MLM 10-K Fiscal year ended Dec. 31, 2024

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K

( Mark One)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31 , 2024

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number 1-12744

MARTIN MARIETTA MATERIALS, INC.

(Exact name of registrant as specified in its charter)

North Carolina		56-1848578
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)
4123 Parklake Avenue , Raleigh , North Carolina		27612
(Address of principal executive offices)		(Zip Code)

( 919 ) 781-4550

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock (par value $.01 per share)		MLM		New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S- T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of June 30, 2024, the last business day of the registrant’s most recently completed second fiscal quarter, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was $ 29,035,890,412 based on the closing sale price as reported on the New York Stock Exchange.

Indicate the number of shares outstanding of each of the issuer’s classes of common stock on the latest practicable date.

Class		Outstanding at February 17, 2025
Common Stock, $.01 par value per share		60,974,146 shares

Auditor Firm Id:	238	Auditor Name:	PricewaterhouseCoopers LLP	Auditor Location:	Raleigh, North Carolina, United States

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TABLE OF CONTENTS

PART I		1
ITEM 1.	BUSINESS	1
ITEM 1A.	RISK FACTORS	13
ITEM 1B.	UNRESOLVED STAFF COMMENTS	25
ITEM 1C.	CYBERSECURITY	26
ITEM 2.	PROPERTIES	27
ITEM 3.	LEGAL PROCEEDINGS	31
ITEM 4.	MINE SAFETY DISCLOSURES	31
INFORMATION ABOUT OUR EXECUTIVE OFFICERS		31
PART II		32
ITEM 5.	MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES	32
ITEM 6.	RESERVED	33
ITEM 7.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	34
ITEM 7A.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	62
ITEM 8.	FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA	63
ITEM 9.	CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE	104
ITEM 9A.	CONTROLS AND PROCEDURES	104
ITEM 9B.	OTHER INFORMATION	105
ITEM 9C.	DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS	105
PART III		106
ITEM 10.	DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE	106
ITEM 11.	EXECUTIVE COMPENSATION	106
ITEM 12.	SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS	106
ITEM 13.	CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE	106
ITEM 14.	PRINCIPAL ACCOUNTANT FEES AND SERVICES	106

PART IV		107
ITEM 15.	EXHIBITS AND FINANCIAL STATEMENT SCHEDULES	107
ITEM 16.	FORM 10-K SUMMARY	113
SIGNATURES		114

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PAR T I

ITEM 1 – BUSINESS

General

Martin Marietta Materials, Inc. (the Company or Martin Marietta) is a natural resource-based building materials company. The Company supplies aggregates (crushed stone, sand and gravel) through its network of approximately 390 quarries, mines and distribution yards in 28 states, Canada and The Bahamas. In 2024, aggregates gross profit accounted for 76% of the Company’s total reportable segment gross profit. Martin Marietta also provides cement and downstream products, namely, ready mixed concrete, asphalt and paving services, in targeted markets where the Company has a leading aggregates position. The Company’s heavy-side building materials are used in infrastructure, nonresidential and residential construction projects. Aggregates are also used in agricultural, utility and environmental applications and as railroad ballast. The aggregates, cement, ready mixed concrete, asphalt and paving operations are reported collectively as the “Building Materials business”. The Company also operates a Magnesia Specialties business with production facilities in Michigan and Ohio. The Magnesia Specialties business produces magnesia-based chemical products that are used in industrial, agricultural and environmental applications. It also produces dolomitic lime sold primarily to customers for steel production and soil stabilization. Magnesia Specialties’ products are shipped to customers domestically and worldwide.

The Company was formed in 1993 as a North Carolina corporation to serve as successor to the operations of the materials group of the organization that is now Lockheed Martin Corporation. An initial public offering of a portion of the Company’s common stock was completed in 1994, followed by a tax-free exchange transaction in 1996 that resulted in 100% of the Company’s common stock being publicly traded. The Company completed over 100 acquisitions, as well as a number of strategic dispositions, from the time of its initial public offering until the present, which allowed the Company to enhance and expand its aggregates-led presence in the building materials marketplace.

On January 12, 2024, the Company acquired Albert Frei & Sons, Inc., a leading aggregates producer in Colorado. This acquisition provides more than 60 years (at current production levels) of high-quality, hard rock reserves to better serve new and existing customers and enhances the Company's aggregates platform in the Denver metropolitan area.

On February 9, 2024, the Company completed the sale of its South Texas cement business and certain of its related ready mixed concrete operations to CRH Americas Materials, Inc., a subsidiary of CRH plc, for $2.1 billion in cash. Specifically, the divested facilities included the Hunter cement plant in New Braunfels, Texas, related cement distribution terminals and 20 ready mixed concrete plants that served the Austin and San Antonio region. This divestiture optimized the Company's portfolio and product mix and provided proceeds the Company used to consummate the Blue Water Industries LLC acquisition discussed below. The transaction resulted in a pretax gain of $1.3 billion.

On April 5, 2024, the Company completed the acquisition of 20 active aggregates operations in Alabama, South Carolina, South Florida, Tennessee and Virginia from affiliates of Blue Water Industries LLC (BWI Southeast) for $2.05 billion in cash. The BWI Southeast acquisition complements Martin Marietta’s existing geographic footprint in the southeast region by expanding into new growth platforms in target markets, including Tennessee and South Florida.

During October 2024, the Company acquired pure aggregates assets in South Florida and Southern California. In December 2024, the Company completed an aggregates-led, bolt-on acquisition in West Texas.

Business Segment Information

The Company conducts its Building Materials business through two reportable segments, organized by geography: East Group and West Group. The East Group provides aggregates and asphalt products. The West Group provides aggregates, cement, downstream products and paving services. The Company’s Magnesia Specialties business is reported as a separate segment and includes its magnesia-based chemicals and dolomitic lime businesses. For more information on the organization and geographic area of the Company’s business segments, see Note A: Accounting Policies and Note O: Segments of the Notes to Financial Statements of the Company’s consolidated financial statements, which appear in Item 8, Financial Statements and Supplementary Data of this Annual Report on Form 10-K (this Form 10-K), which information is incorporated by reference.

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Building Materials Business

The profitability of the Building Materials business, which serves customers in the construction marketplace, is sensitive to national, regional and local economic conditions and construction cyclicality, which are in turn affected by fluctuations in levels of public-sector infrastructure funding; interest rates; access to capital markets; and demographic, geographic, employment and population dynamics. The heavy-side construction business is conducted outdoors, as are much of the Building Materials business’ operations. Therefore, erratic weather patterns, seasonal changes and other weather-related conditions, including precipitation, flooding, hurricanes, snowstorms, extreme temperatures, wildfires, earthquakes and droughts, can significantly affect production schedules, shipments, costs, efficiencies and profitability. Generally, the financial results for the first and fourth quarters are subject to the impacts of winter weather, while the second and third quarters are subject to the impacts of heavy precipitation.

The Building Materials business markets its products primarily to the construction industry, with 37% of its 2024 aggregates shipments sold to customers in connection with highway and other public infrastructure projects and the balance of its shipments sold primarily to customers for nonresidential and residential construction projects. The Company believes the business’ mix of public sector-related shipments lessens the impacts of fluctuations in nonresidential and residential, or private-sector, construction spending.

Funding of public infrastructure, historically the Company’s largest end-use market, is discussed in greater detail under Building Materials Business’ Key Considerations—Public Infrastructure in Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations of this Form 10-K.

The Building Materials business covers a wide geographic area. The ten largest revenue-generating states (Texas, North Carolina, Colorado, California, Georgia, Florida, Minnesota, Arizona, South Carolina and Iowa) accounted for 81% of the Building Materials business’ revenues in 2024. The Building Materials business is accordingly affected by the economies in these regions and has been adversely affected in part by episodic recessions and weaknesses in these economies and may be affected by future declines in economic conditions, such as recessions, economic downturns or inflationary conditions.

Aggregates

Aggregates, consisting of crushed stone, sand and gravel, are an engineered, granular material that is manufactured to specific sizes, grades and chemistry for use primarily in construction applications. The Company’s operations consist primarily of open pit quarries; however, the Company is the largest operator of underground aggregates mines in the United States, with 14 active underground mines located in the East Group.

Natural aggregates sources can be found in relatively homogeneous deposits in certain areas of the United States. Proximity of quarry facilities to customers’ plants, construction sites or long-haul transportation corridors is an important factor in competition for the sale of aggregates products. Generally, the distance shipments travel by truck from a given quarry is limited because the cost of transporting processed aggregates to customers is high in relation to the price of the product itself. The Company’s distribution system mainly uses trucks, but also has access to rail and waterborne networks where the per-mile unit costs of transporting aggregates are lower.

The Company’s distribution network moves aggregates materials from certain domestic and offshore sources via its long-haul rail and waterborne distribution network to markets where aggregates supply is limited. The Company’s rail network primarily serves its Texas, Southeast and Gulf Coast markets, while the Company’s locations in The Bahamas and Nova Scotia transport materials via oceangoing ships. The Company’s strategic focus includes expanding inland and offshore capacity and acquiring distribution facilities and port locations to offload and sell transported material. As of December 31, 2024, the Company’s aggregates distribution facilities consisted of 78 distribution yards. The Company’s rail-based distribution network, coupled with the extensive use of rail service, increases the Company’s dependence on and exposure to railroad performance, including track congestion, crew availability, railcar availability, locomotive availability and the ability to negotiate favorable railroad shipping contracts. The waterborne distribution network also increases the Company’s exposure to certain risks, including, among other items, meeting minimum tonnage requirements of shipping contracts, demurrage costs, fuel costs, ship availability and weather disruptions. The Company has agreements with shipping companies to provide vessels to transport its aggregates to various coastal ports.

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The Company generally acquires contiguous property around existing quarry locations. Such parcels can serve as buffer property or additional mineral reserves, assuming the underlying geology supports economical aggregates mining. In either instance, the acquisition of additional property around an existing quarry typically allows the expansion of the quarry footprint and extension of quarry life. Some locations having limited reserves may be unable to expand.

Due to the nature of the indigenous aggregates supply in the midwestern United States, a long-term capital focus for the Company is underground limestone aggregates mines. Production costs are generally higher at underground mines than surface quarries because the depth of the aggregates deposits and the access to the reserves result in higher costs related to development, explosives and depreciation costs. However, these locations often possess marketplace transportation advantages that can lead to higher average selling prices than more distant surface quarries.

The construction aggregates industry has been consolidating, and the Company has actively participated in the industry’s consolidation. The Company’s Board of Directors and management continue to review and monitor the Company’s long-term strategic plans, commonly referred to as SOAR ( S trategic O perating A nalysis and R eview), which include assessing portfolio optimization strategies such as business combinations and arrangements with other companies engaged in similar businesses, investing in internal expansion projects in high-growth markets, divesting businesses or nonoperating assets that are not core or do not further management’s strategy and pursuing new opportunities in the Company’s existing markets or new markets. Acquisition opportunities include public companies, public company carve-outs and private sponsor-owned and family-owned businesses, as well as asset swaps and divestitures from companies executing their strategic plans, rationalizing non-core assets and repairing financially-constrained balance sheets. When acquired, new locations sometimes do not satisfy the Company’s internal safety, maintenance, pit development or other standards, and may require additional investments before benefits of the acquisitions are fully realized.

Management believes its aggregates reserves are sufficient to permit production at present operational levels for the foreseeable future. The Company does not anticipate any significant difficulty in accessing reserves used for production. The Company’s aggregates reserves average more than 85 years, based on the 2024 annual production level. However, certain locations may be subject to limited reserves and may not be able to expand. Moreover, environmental, zoning and land use regulations will likely make it more difficult for the Company to expand its existing quarries or develop new quarry operations. Although it cannot be predicted what policies will be adopted in the future by federal, state and local governmental bodies regarding these matters, the Company anticipates that future restrictions will likely make zoning and permitting more difficult, thereby potentially enhancing the value of the Company’s existing mineral reserves.

The Company generally sells its aggregates upon receipt of customer orders or requests. The Company generally maintains inventories of aggregates products in sufficient quantities to meet customer requirements.

Cement and Downstream Operations

Cement is the basic agent used to bind aggregates, sand and water in the production of ready mixed concrete. Similar to aggregates, cement is used in infrastructure projects, nonresidential and residential construction, and the railroad, agricultural, utility and environmental industries. Consequently, the cement industry is cyclical and dependent on the strength of the construction sector. As of December 31, 2024, the Company has one production facility in Midlothian, Texas, south of Dallas/Fort Worth, which produces Portland and specialty cements. Clinker is the intermediate product in cement production, and the Texas production facility has an annual clinker capacity of 2.4 million tons. The Company completed a finishing capacity expansion project at the Midlothian plant in August 2024, which will provide 0.45 million tons of incremental annual cement production capacity. Further, the Company has converted its Midlothian plant to manufacture a less carbon-intensive Portland limestone cement, known as Type 1L, which has been approved by the Texas Department of Transportation and allows the production of more cement with less clinker.

Calcium carbonate in the form of limestone is the principal raw material used in the production of cement. Management believes that its reserves of limestone are sufficient to permit production at its cement plant at the current operational levels for the foreseeable future.

Cement consumption is dependent on the time of year and prevalent weather conditions. According to the Portland Cement Association, nearly two-thirds of U.S. cement consumption occurs in the six months between May and October. Approximately 70% to 75% of all cement shipments are sent to ready mixed concrete operators. The remainder is shipped to manufacturers of concrete-related products, contractors, materials dealers and oil well/mining/drilling companies. The Company's cement operation generally delivers its products upon receipt of customer orders or requests. Inventory for products is generally maintained in sufficient quantities to meet customers' rapid delivery requirements.

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Ready mixed concrete is measured in cubic yards and specifically batched or produced for customers’ construction projects and then typically transported by mixer trucks and poured at the project site. The aggregate used for ready mixed concrete is a washed material with limited amounts of fines (such as dirt and clay). As of December 31, 2024, the Company operated 72 ready mixed concrete plants in Arizona and Texas. Asphalt is most commonly used in surfacing roads and parking lots and consists of liquid asphalt, or bitumen (the binding medium), and aggregates. Similar to ready mixed concrete, each asphalt batch is produced to customer specifications. As of December 31, 2024, the Company operated 38 asphalt plants in Arizona, California, Colorado and Minnesota. The Company also offers paving services in California and Colorado. Market dynamics for these downstream product lines include a highly competitive environment and lower barriers to entry compared with aggregates and cement.

The cement and downstream operations results are affected by volatile factors, including energy-related costs, operating efficiencies and weather, to a greater extent than the Company’s aggregates operations. Liquid asphalt and cement serve as key raw materials in the production of hot mix asphalt and ready mixed concrete, respectively. Therefore, fluctuations in prices for these raw materials directly affect the Company’s operating results.

Magnesia Specialties Business

The Magnesia Specialties business produces and sells dolomitic lime from its Woodville, Ohio facility and manufactures magnesia-based chemical products for industrial, agricultural and environmental applications at its Manistee, Michigan facility. These magnesia-based chemical products have varying uses, including flame retardants, wastewater treatment, pulp and paper production and other applications. In 2024, 59% of Magnesia Specialties’ revenues were attributable to chemical products, 40% to lime, and 1% to stone sold as construction materials.

Magnesia Specialties generally delivers its products upon receipt of customer orders or requests. Inventory for products is generally maintained in sufficient quantities to meet customers' rapid delivery requirements. Dolomitic lime products sold to external customers are used primarily by the steel industry. Accordingly, a portion of the revenues and profitability of the Magnesia Specialties business is affected by the steel industry's production and inventory trends. These trends are guided by the rate of consumer consumption, the flow of offshore imports and other economic factors.

The principal raw materials used in the Magnesia Specialties business are dolomitic limestone and magnesium-rich brine. Management believes that its reserves of dolomitic limestone and brine are sufficient to permit production at the current operational levels for the foreseeable future.

In the Magnesia Specialties business, a significant portion of costs is of a fixed or semi-fixed nature. The production process requires the use of natural gas, coal and petroleum coke. Therefore, fluctuations in their pricing directly affect operating results.

Given high fixed costs, low capacity utilization can negatively affect the segment’s results from operations. Management has shifted the strategic focus of the magnesia-based business to grow and diversify the specialty chemicals product portfolio to reliably produce at volume levels that support efficient operations. Accordingly, these products are less dependent on the steel industry than the dolomitic lime product line. Management expects future organic profit growth to result from increased pricing, commercialization of new products, entry into new or adjacent markets and optimization of overall product mix.

The Magnesia Specialties business is highly dependent on rail transportation, particularly for movement of dolomitic lime from Woodville to Manistee and direct customer shipments of dolomitic lime and magnesia chemicals products from both Woodville and Manistee. The segment can be affected by the specific transportation and other risks and uncertainties outlined under Item 1A, Risk Factors of this Form 10-K.

Patents and Trademarks

As of January 31, 2025, the Company owns, has the right to use, or has pending applications for patents pending or granted by the United States and various countries and trademarks related to its business. The Company believes that its rights under its existing patents, patent applications and trademarks are of value to its operations, but no one patent or trademark or group of patents or trademarks is material to the conduct of the Company’s business as a whole.

Customers

The Company’s products are sold principally to commercial customers in private industry. Although large amounts of construction materials are used in public works projects, relatively insignificant sales are made directly to federal, state, county or municipal governments, or agencies thereof. No material part of the business as a whole, or of any segment of the Company,

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is dependent upon a single customer or upon a few customers. The loss of any single customer would not have a material adverse effect on the Company.

Competition

The nature of the Company’s competition varies among its products due to the widely differing amounts of capital necessary to build and maintain production facilities. Crushed stone production from quarries or mines and sand and gravel production by dredging or otherwise are moderately capital intensive. Construction of cement production facilities is highly capital intensive and requires long lead times to complete engineering design, obtain regulatory permits, acquire equipment and construct a plant. Most domestic cement producers are subsidiaries of large multinational companies that operate in multiple international markets. Many of these producers maintain the capability to import cement from foreign production facilities. Producing ready mixed concrete involves relatively low capital investment to build a concrete batching plant and acquire delivery trucks. Accordingly, economics can lead to lower barriers to entry in some concrete markets. As a result, depending on the local market, the Company may face competition from small producers as well as large, vertically-integrated companies with facilities in many markets.

The Company operates in a highly fragmented industry, including large, public companies and a significant number of small privately-held companies. In 2024, other publicly traded companies among the ten-largest U.S. aggregates producers included the following:

Due to the localized nature of the industry resulting from the high cost of transportation relative to the price of the product, the Building Materials business primarily operates in smaller distinct areas that can vary from one another. The Company believes that its ability to transport materials by rail and waterborne vessels has enhanced its ability to compete in the building materials industry.

The Magnesia Specialties business competes with various companies in different geographic and product areas principally on the basis of quality, price, technological advances and technical support for its products. While the revenues of the Magnesia Specialties business in 2024 were predominantly domestic, a portion was derived from customers located outside the United States.

Environmental and Governmental Regulations

Overview

The Company’s operations are subject to and affected by federal, state and local laws, rules and regulations relating to zoning, land use, mining, air emissions (including carbon dioxide and other greenhouse gases), water use, allocation and discharges, waste management, noise and dust exposure control, reclamation and other environmental, health and safety, and regulatory matters. Certain of the Company’s operations may occasionally involve the use of substances that are classified as toxic or hazardous within the meaning of these laws and regulations. Environmental operating permits are, or may be, required for certain of the Company’s operations, and such permits are subject to modification, renewal and revocation.

Environmental Compliance and Costs

The Company regularly monitors and reviews its operations, procedures and policies for compliance with existing laws, rules and regulations, changes in interpretations of existing laws and enforcement policies, new laws that are adopted and new laws that the Company anticipates will be adopted that could affect its operations, including with respect to climate change. The Company has a full-time team of environmental engineers and managers that perform these responsibilities. The direct costs

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of ongoing environmental compliance were approximately $58 million in 2024 and $45 million in 2023 and are related to the Company’s environmental staff, ongoing monitoring costs for various matters (including those matters disclosed in this Form 10-K) and asset retirement costs. Capitalized costs related to environmental control facilities were $32 million in 2024 and are expected to be approximately $35 million in both 2025 and 2026. The Company’s capital expenditures for environmental matters were not material to its results of operations or financial condition in 2024 and 2023. However, the Company’s expenditures for environmental matters generally have increased over time and are likely to increase in the future. Despite the Company’s compliance efforts, the risk of environmental liability is inherent in the Company’s businesses, and environmental liabilities could have a material adverse effect on the Company in the future. Complying with governmental and environmental regulations did not have and is not expected to have a material effect on the Company’s capital expenditures, earnings and competitive position, other than as discussed in this section.

Many of the applicable requirements of environmental laws are satisfied by procedures that the Company adopts as best practices in the ordinary course of its business. For example, plant equipment that is used to crush aggregates products may, in the ordinary course of operations, have an attached water spray bar that is used to clean the stone. The water spray bar also serves as a dust control mechanism that complies with applicable environmental laws. Moreover, the Company does not separate the portion of the cost, depreciation and other financial information relating to the water spray bar that is attributable only to environmental purposes, because such an allocation would be arbitrary. The incremental portion of such operating costs that is attributable to environmental compliance rather than best operating practices is impractical to quantify. Accordingly, the Company records costs in that category when incurred as operating expenses.

Consistent with other cement producers, the Company’s cement operation produces varying quantities of cement kiln dust (CKD). This production by-product consists of fine-grained, solid, highly alkaline material removed from cement kiln exhaust gas by air pollution control devices. Because much of the CKD is unreacted raw materials, it is generally permissible to recycle the CKD back into the production process, and large amounts often are treated in such manner. CKD that is not returned to the production process or sold as a separate product is disposed in landfills. CKD is currently exempted from federal hazardous waste regulations under Subtitle C of the Resource Conservation and Recovery Act.

The environmental accruals recorded by the Company are based on internal studies of the required remediation costs and estimates of potential costs that arise from time to time under federal, state and/or local environmental protection laws. Many of these laws and their attendant regulations are complex and are subject to challenges and new interpretations by regulators and the courts. In addition, new laws are also enacted from time to time. It is often difficult to accurately and fully quantify the costs to comply with new rules until it is determined to which type of operations they will apply and the manner in which they will be implemented is more accurately defined. This process typically takes years to finalize, and the rules often change significantly from the time they are proposed to the time they are final. The Company typically has several appropriate alternatives available to satisfy compliance requirements, which could range from nominal costs to some alternatives that may be satisfied in conjunction with equipment replacement or expansion that also benefit operating efficiencies or capacities and carry significantly higher costs.

Management believes that its current accrual for environmental costs is reasonable, although those amounts may increase or decrease depending on the impact of applicable rules as they are finalized or amended from time to time and changes in facts and circumstances. The Company believes that its operations and facilities, both owned or leased, are in substantial compliance with applicable laws and regulations and any potential noncompliance is not likely to have a material adverse effect on the Company’s operations or financial condition. See Legal Proceedings under Item 3 of this Form 10-K, Note N: Commitments and Contingencies of the Notes to Financial Statements of the Company’s consolidated financial statements included under Item 8, Financial Statements and Supplemental Data of this Form 10-K, and the Environmental Regulation and Litigation section included under Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations of this Form 10-K. However, future events, such as changes in or modified interpretations of existing laws and regulations or enforcement policies, or further investigation or evaluation of the potential health hazards of certain products or business activities, may give rise to additional compliance and other costs that could have a material adverse effect on the Company.

Mine Safety and Land Reclamation

In general, mining, production and distribution facilities for aggregates, cement, ready mixed concrete and asphalt must comply with air quality, water quality and other environmental regulations, zoning and special use permitting requirements, applicable mining regulations, and federal health and safety requirements. As the Company locates and acquires new production and distribution facilities, the Company works closely with local authorities during the zoning and permitting processes to design new quarries, mines, production and distribution facilities in such a way as to minimize disturbances. The Company frequently

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acquires large tracts of land so that quarry, mine, production and distribution facilities can be situated at a substantial distance from surrounding property owners. Also, in certain markets, the Company’s ability to transport material by rail or water allows it to locate its facilities further away from residential areas. The Company has established policies designed to minimize disturbances to surrounding property owners from its operations.

As is the case with other similarly situated companies, some of the Company’s products contain varying amounts of crystalline silica, a common mineral also known as quartz. Excessive, prolonged inhalation of very small-sized particles of crystalline silica has been associated with lung diseases, including silicosis, and several scientific organizations and some states, such as California, have reported that crystalline silica can cause lung cancer. The Mine Safety and Health Administration (MSHA) and the Occupational Safety and Health Administration (OSHA) have established occupational thresholds for crystalline silica exposure as respirable dust. The Company monitors occupational exposures at its facilities and implements dust control procedures and/or makes available appropriate respiratory protective equipment to maintain the occupational exposures at or below the required levels. The Company, through safety information sheets and other means, also communicates appropriate warnings and cautions its employees and customers about the risks associated with excessive, prolonged inhalation of mineral dust in general and crystalline silica in particular.

The Company is generally required by state or local laws or pursuant to the terms of an applicable lease to reclaim quarry sites after use. Future reclamation costs are estimated using statutory reclamation requirements and management’s experience and knowledge in the industry, and are discounted to their present value using a credit-adjusted, risk-free interest rate. The future reclamation costs are not offset by potential recoveries. For additional information regarding compliance with legal requirements, see Note N: Commitments and Contingencies of the Notes to Financial Statements of the Company’s consolidated financial statements included in Item 8, Financial Statements and Supplemental Data of this Form 10-K. The Company performs activities on an ongoing basis, as an integral part of the normal quarrying process, that may reduce the ultimate reclamation obligations. For example, the perimeter and interior walls of an open pit quarry are sloped and benched as they are developed to prevent erosion and provide stabilization. This sloping and benching meets both safety regulations required by MSHA for ongoing operations as well as final reclamation requirements. Therefore, these types of activities are included in normal operating costs and are not a part of the asset retirement obligation. Reclaimed quarry sites owned by the Company are from time to time available for sale, typically for commercial development or use as water reservoirs, or have been converted for recreational use by the local community.

Sustainability Risks and Opportunities

The Board and management have identified certain risks related to a lower-carbon economy, risks related to the physical impacts of climate change and other climate-related opportunities.

Board Oversight and the Role of Management The Board of Directors has an essential role in determining the Company's strategic priorities, and sustainability matters are an integral part of its governance and oversight of the business. In 1994, the Company established an Ethics, Environment, Safety and Health (EESH) Committee, which currently meets at least four times annually. The EESH Committee receives reports directly from management relating to environmental, safety, ethics and other sustainability matters, including greenhouse gas (GHG) emissions, reviews input and engagement with investors on these matters, and monitors the Company's compliance with environmental, health and safety laws and regulations, as well as its public reporting and disclosure with respect to sustainability risks and opportunities and other environmental issues. The EESH Committee reports to the full Board. A number of other Board committees have overlapping responsibility for sustainability matters, including the Audit Committee, which reviews the Company's significant environmental matters and assesses the potential risks and liabilities they may pose to its business, and the Management Development and Compensation Committee, which reviews management's performance with regard to its sustainability goals and considers those achievements in determining incentive pay. While the Board oversees Martin Marietta's risk management, the executive officers are responsible for the day-to-day risk management processes, and management receives at least quarterly updates from operating personnel directly responsible for compliance relating to EESH matters. Management believes this division of responsibilities is the most effective approach for addressing the risks facing the Company. The Company also has a Head of Sustainability, who reports directly to the General Counsel on environmental and other sustainability matters. The Company believes the above approach has been effective in integrating sustainability as a core element of its corporate governance.

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Transition Risks

The Company's sustainability risk management framework is designed to identify various transition risks, including policy and legal risks, technology risks, market risks and reputation risks, associated with a lower-carbon economy.

Policy and Legal Risks A number of governmental bodies, including U.S. regulatory agencies and various U.S. states, have proposed, enacted or are contemplating legislative and regulatory changes to mitigate or address the potential impacts of climate change, including provisions for GHG emissions reporting or reductions, the use of alternative fuels, carbon credits (such as a cap-and-trade system) and a carbon tax. For example, in the United States, the United States Environmental Protection Agency (USEPA) promulgated a rule mandating that companies considered to be large emitters of GHGs report those emissions. The manufacturing operations of the Company’s Magnesia Specialties business release carbon dioxide, methane and nitrous oxides during the production of lime, magnesium oxide and hydroxide products. The Company’s two magnesia-based chemicals facilities, as well as its cement plant in Texas, file annual reports of their GHG emissions in accordance with the USEPA reporting rule. The primary business and operations of the Company, however, including its aggregates, ready mixed concrete and asphalt and paving product lines, are not considered “major” sources of GHG emissions subject to the USEPA reporting rule. Most of the GHG emissions from aggregates plant operations are tailpipe emissions from mobile sources, such as heavy construction and earth-moving equipment.

The Company’s cement plant and its Magnesia Specialties plants are strictly regulated with respect to GHG emissions and hold Title V Permits, and each (other than the Manistee, Michigan facility) is also subject to the U.S. Clean Air Act's Prevention of Significant Deterioration (PSD) requirements, which require a permit program for certain new or modified sources of emissions. Although several large-scale projects for carbon capture are in the development phase, no technologies or methods of operation for reducing or capturing GHGs have yet been proven successful in large-scale applications, other than improvements in fuel efficiency. If future modifications to the Company's facilities require PSD review for other pollutants, GHG permitting requirements may be triggered and may require significant additional costs, which the Company expects would be passed on to customers. It is not currently possible to estimate the cost of any such future requirements. In addition, the USEPA and the U.S. Supreme Court have taken different positions with respect to the USEPA's authority to make rules in these and other areas which could create uncertainty regarding regulatory compliance on these matters in the future.

Various states where the Company has operations have enacted or are considering climate change initiatives that apply to the Company. In October 2023, California adopted its California Climate Accountability Package which includes annual reporting of Scope 1, Scope 2 and Scope 3 emissions on a phased-in implementation schedule, climate-related risk reporting for certain companies and heightened disclosure standards around net zero emissions claims, carbon-neutral claims or significant GHG emissions reduction claims and the purchase or use of voluntary carbon offsets used to achieve those claims. These and other state or federal climate-related or anti-climate, social and governance regulations may result in significantly higher compliance costs and risks.

The Company's cement operation, like those of other cement producers, requires combustion of significant amounts of fuel to generate high kiln temperatures and create carbon dioxide as a product of the calcination process, which is presently an unavoidable step in making clinker, the essential component for cement production. Accordingly, the Company continues to closely monitor GHG regulations and legislation and its potential impact on the Company's cement business, financial condition and product demand. The Company anticipates that any increased operating costs or taxes relating to GHG emission limitations at the Woodville lime plant or Midlothian cement plant would be passed on to customers. The magnesium oxide products produced at the Manistee operation, however, compete against other products that, due to the form and/or structure of the source material, require less energy in the calcination process, resulting in the generation of fewer GHGs per ton of production. The Manistee facility may be required to absorb additional costs, including for taxes or capital investments, in order to maintain competitive pricing in that market. In addition, the cement produced by the Company’s cement operation, like other U.S. producers, is subject to strict limits set by the U.S. Department of Transportation (USDOT) and other agencies, including those relating to “clinker substitution”, or the replacement of ground clinker in cement with alternate materials such as pozzolan, slag and fly ash, which has implications for the Company’s fuel use and efforts to reduce GHG emissions from its cement operations. For example, various industry associations are engaged in an effort requesting the USDOT and other agencies to further revise their standards allowing for greater rates of clinker substitution, similar to the rates currently permitted for European cement producers. If higher rates of substitution and blending are, in fact, permitted in the future, the result is likely to be both reduced clinker and power consumption in cement production, which would, in turn, reduce GHGs emitted in connection with each ton of cement produced in the United States. The Company has continued its rollout of Portland

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Limestone Cement (PLC cement) with more than 90% of its Type I/II customers converted to the PLC product. PLC cement has reduced the GHG footprint of the Company's cement product line by greater than 10%.

In light of the various regulatory uncertainties, the Company cannot presently reasonably predict the costs of any future compliance requirements. Nonetheless, the Company does not believe it will have a material adverse effect on the financial condition or results of the operations of either the Magnesia Specialties business or Building Materials business.

Technology Risks Consideration of the impact of technology is integrated into the Company’s risk management process. The Company has adopted a corporate-wide sustainability risk management strategy, which has resulted in multiple initiatives to identify and implement or evaluate GHG reduction processes and technologies that also improve operational efficiencies, including: using alternative fuels such as biodiesel; reducing overall fuel use by converting from quarry trucks to conveyor systems; right-sizing quarry trucks to match the appropriately sized truck with the size of production to reduce the number of required trips; replacing older railcars with more efficient, high-capacity models that reduce the number of required trips; adding rail capacity in lieu of truck movements; and installing state-of-the-art emissions control equipment at the Company’s magnesia plant and tire processing systems for fuel at the Company’s cement plant. The Company’s Midlothian cement plant has been recognized by the USEPA as a high-performing, energy-efficient facility following investments in innovative air pollution control technologies and usage of alternative fuels. The road to Net Zero for the Company and others in its industry requires operational changes, investments in sustainable energy, and in some cases, technology that is not yet available. The Company continues to monitor various pilot projects being conducted relating to the development of carbon capture technology; however, no technologies or methods of operation for reducing or capturing GHGs from cement manufacture have yet been proven successful in a full production environment, other than improvements in fuel efficiency. While awaiting further development of carbon capture technology, the Company has invested heavily and continues to look for opportunities to invest in its sustainability practices.

Market Risks The nature of the Company’s competition varies among its products due to the differing amounts of capital necessary to build and maintain production facilities and can be influenced by sustainability risks and opportunities particularly with respect to the Company’s small-but-strategic heritage cement business. Most domestic cement producers are owned by large non-U.S. companies operating in multiple international markets that report their results (including sustainability and emissions-related metrics) on a world-wide consolidated basis. The Company is subject to U.S. environmental regulations and there are critical regulatory differences between the U.S. and the European Union and differing calculation methodologies for carbon intensity calculations, blending and fuel choice that result in meaningful differences in the makeup of corresponding end-products and reported emissions metrics. Those differences, in turn, make like-for-like comparisons of the emissions performance of non-U.S. companies with the performance of the Company's heritage cement business challenging. To the extent that investors or consumers decide to use world-wide comparisons of these metrics in making investment and purchase decisions, the Company could be at a competitive disadvantage. Geography is critically important when assessing market attractiveness and growth opportunities for the Company. Attractive geographies generally exhibit (a) population growth and/or high population density, both of which are drivers of heavy-side building materials consumption; (b) business and employment diversity, drivers of greater economic stability, and (c) a superior state financial position, a driver of public infrastructure investment. All of these factors can be and are influenced by weather patterns and physical risk and opportunities.

Reputation Disruptions to the Company’s operations and to its customers' transportation activities by weather-related risks could impact the Company’s reputation and result in additional costs to the Company. Any failure or perceived failure to achieve or accurately report on the Company's current or future sustainability commitments, including its GHG reduction and net zero ambition and targets, and any differences between its commitments and those of any companies to which the Company is compared, could harm the Company's reputation, adversely affect its ability to effectively compete (including as a result of disclosure of proprietary information regarding its plants or changes in its ability to raise capital), adversely affect its recruitment and retention efforts or expose the Company to potential legal liability. In addition, while the Company is committed to pursuing its sustainability objectives, there is no assurance that it will achieve any of its sustainability goals or commitments, that low- or non-carbon-based energy sources and technologies required to meet long-term emissions reductions in some of the sectors in which it operates will be available at scale in the United States on an economically feasible basis or that its suppliers can meet sustainability, emissions reductions and other standards that are required by current or future laws or established by its investors and other stakeholders. Failure to meet these commitments could result in reputational harm to the Company and changes regarding sustainability risk management and practices may result in higher regulatory and compliance risks and costs. Any violations of law (including environmental law) or improper conduct could damage the Company's reputation.

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Physical Impacts In addition to impacts from increased regulation, weather patterns may result in physical impacts that could have adverse effects on the Company’s operations or financial condition. Physical impacts may include disruptions in production and/or regional supply or product distribution networks due to major storm events and shifts in regional rainfall and temperature patterns and intensities, as well as flooding from sea level changes. In addition, production and shipment levels for the Building Materials business correlate with general construction activity, which occurs outdoors and, as a result, is affected by erratic weather patterns, seasonal changes and other unusual or unexpected weather-related conditions, which can significantly affect that business. In the Company's cement and downstream operations, the physical impacts of weather may result in disruptions to its operations or its customers’ transportation activities, including impacts on production capabilities and capacities, supply chain interruptions and project delays that can impact the Company's reputation and result in additional costs to the Company. Excessive rainfall and other severe weather jeopardize production, shipments and profitability in all markets served by the Company in its Building Materials business. In addition, inclement weather can reduce the useful life of an asset. In particular, the Company’s operations near the Atlantic Ocean and Gulf Coast regions of the United States and The Bahamas are at risk for hurricane activity, most notably in August, September and October. The Company is also at risk for Pacific Ocean storm activity. The last several years brought an unprecedented amount of precipitation to the United States and particularly to Texas and the southeastern United States, notably the Carolinas, Florida and Georgia, where it impacted the Company’s facilities. In addition, the Company's California operations are at risk for wildfires and water use restrictions in the event of severe drought conditions. An insufficient supply of water for the Company's operations in those areas could impact production. While reconstruction activities may offset some or most of the financial impacts on sales and demand, any of these events could have a material adverse effect on the Company’s business and operations.

As the Company's footprint of quarries and aggregates facilities has grown nationwide, management believes it has bolstered resilience in its operations by maintaining a geographically diverse business and distribution network that is increasingly able to adjust to local disruptions and source materials from different facilities. In addition, because the Company transports aggregates products by various methods, including rail and water, it may be able to mitigate supply or transportation issues in any location caused by severe weather or disruptions in any transport modality.

Sustainability Opportunities Notwithstanding the foregoing risks and uncertainties relating to climate change, there may also be opportunities for the Company to increase its business or revenues through sustainability opportunities. For example, warm and/or moderate temperatures in March and November allow the construction season to start earlier and end later, respectively, which could have meaningfully positive impacts on the Company’s first- and fourth-quarter results, respectively. From a regulatory standpoint, the Infrastructure Investment and Jobs Act (IIJ Act), which was signed into law in November 2021, provides billions of dollars in new funding for roads, bridges and other major infrastructure projects which require aggregates and cement for construction. New public transit and clean energy projects that address climate change may also result in increased demand for the Company's products. Other opportunities are likely to result from the passing of the $1.2 trillion IIJ Act, the Cornyn-Padilla Amendment that allows $104 billion of unused COVID-19 dollars to be directed to infrastructure projects, and $41 billion of voter-approved state and local transportation-related 2024 ballot initiatives, all of which will fund infrastructure growth, repair and development. In addition, the Company’s magnesium hydroxide products are used to increase fuel efficiency in various industries, including both coal- and gas-fired electricity generation, which has a direct impact on reducing energy use and GHG emissions by more GHG-intense companies. Finally, the desire for sustainable building solutions has led to greater recognition of the benefits of concrete construction in the effort to move to a circular economy through innovative products, longevity and recyclability, and increased demand for green construction projects would have a direct impact on the Company’s cement and concrete business.

Land Management

The Company owns approximately 170,000 acres of land, the vast majority of which is used in connection with active facilities. The Company regularly reviews its land holdings to determine their highest and best use based on its management expertise. Land holdings that do not have economically recoverable reserves for current or future mining or are otherwise not in locations that complement the Company’s operating facilities are considered candidates for sale or development for sale.

Human Capital Resources

As of January 31, 2025, the Company has approximately 9,400 employees, of which approximately 7,000 are hourly employees and approximately 2,400 are salaried employees. Approximately 1,200 hourly employees (13% of the Company’s employees) are represented by labor unions, representing 14% of the Building Materials business’ hourly employees and 100% of the Magnesia Specialties segment’s hourly employees. The Company’s principal union contracts for the Magnesia Specialties

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business cover employees at the Manistee, Michigan, magnesia-based chemicals plant and the Woodville, Ohio, lime plant. The Woodville and Manistee collective bargaining agreements expire in June 2026 and August 2027, respectively. The Company believes it has good relations with its employees, including its unionized workforce.

Management believes the Company’s success depends on its ability to attract, develop and retain key personnel. Martin Marietta offers a comprehensive benefits package that includes:

The Company significantly enhanced company-provided benefits for its hourly employees in 2022 and 2023. The Company increased the benefit value for hourly employees in its currently fully funded pension plan by 76% in 2022. In conjunction with this increase, the Company embarked on a comprehensive education campaign to help employees better understand their retirement benefits and how that impacts their individual decisions to save for retirement. Additionally, in 2023, the Company added Company-paid, long-term disability insurance for its hourly employees and implemented a more robust paid time off (PTO) policy, which increased PTO benefits for the vast majority of employees.

The Company’s management oversees various employee initiatives to develop its employees and the Management Development and Compensation Committee regularly reviews the compensation and development programs to achieve those objectives. The Company offers many training and development opportunities, including the following:

The Company believes that a diverse employee base strengthens its talent pipeline and increases employee engagement and retention. The Company completed an associated awareness communications campaign helping managers and employees better understand how inclusion and engagement are ingrained in Martin Marietta’s culture and values. The campaign supports the Company's employer brand — ONE , which brings together its employees’ unique perspectives, experiences and talents to

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evolve a shared vision and future. The Company offers three employee resource groups — Military and Veterans Community, Multicultural Employee Resource Group (MERGE) and Women Who Build — that provide opportunities for all employees to share their varied perspectives and experiences, grow their internal networks, develop their careers and give back to their communities. The Company also has expanded its academic outreach by partnering with Shaw University, a historically black university in Raleigh, North Carolina.

Workplace health and safety is one of the Company’s core values. The Guardian Angel safety program provides that every employee has the right, and the obligation, to stop any unsafe condition and that zero safety incidents is achievable. It includes the notion that every employee acts as a wingman for other employees, to observe and act on any situation that potentially creates unsafe circumstances. The Company-wide safety performance achieved the eighth consecutive year of world class or better lost-time incident rate and the fourth consecutive year for total injury incidence rate.

Available Information

The Company maintains an internet address at www.martinmarietta.com . The Company makes available free of charge through its internet website its Annual Report on Form 10‑K, Quarterly Reports on Form 10‑Q, Current Reports on Form 8‑K, and amendments to those reports, if any, filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (Exchange Act), which are available as soon as reasonably possible after they are submitted to the Securities and Exchange Commission (SEC). You can access the Company’s filings with the SEC through the SEC website at www.sec.gov or through the Company's website, and the Company strongly encourages you to do so. Martin Marietta routinely posts information that may be important to investors on its website at www.ir.martinmarietta.com , and it uses this website address as a means of disclosing material information to the public in a broad, non-exclusionary manner for purposes of the SEC’s Regulation Fair Disclosure (Reg FD). The contents of the Company's website are not incorporated by reference in this Form 10-K and shall not be deemed “filed” under the Securities Exchange Act of 1934, as amended. The Company undertakes no obligation to update any statements herein for revisions or changes after the filing date of this Form 10-K other than as required by law.

The Company has adopted a Code of Ethical Business Conduct that applies to all of its Board of Directors, officers and employees. The Company’s code of ethics is available on the Company’s website www.martinmarietta.com . The Company will disclose on its internet website any waivers of or amendments to its code of ethics as it applies to its directors and executive officers.

The Company has adopted a set of Corporate Governance Guidelines to address matters of fundamental importance relating to the corporate governance of the Company, including director qualifications and responsibilities, responsibilities of key board committees, director compensation and similar matters. Each of the Audit Committee, the Management Development and Compensation Committee, and the Nominating and Corporate Governance Committee of the Board of Directors has adopted a written charter addressing various matters of importance relating to each committee, including the committee’s purposes and responsibilities, an annual performance evaluation of each committee and similar matters. These Corporate Governance Guidelines , and the charters of each of these committees, are available on the Company’s website at www.martinmarietta.com .

The Company’s Chief Executive Officer and Chief Financial Officer are required to file with the SEC each quarter and each year certifications regarding the quality of the Company’s public disclosure of its financial condition. The annual certifications are included as exhibits to this Form 10‑K. The Company’s Chief Executive Officer is also required to certify to the New York Stock Exchange each year that he is not aware of any violation by the Company of the New York Stock Exchange corporate governance listing standards.

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ITEM 1A – RISK FACTORS

An investment in Martin Marietta common stock or debt securities involves risks and uncertainties. You should consider the following factors carefully, in addition to the other information contained in this Form 10-K, before deciding to purchase or otherwise trade the Company’s securities.

This Form 10-K and other written reports and oral statements made from time to time by the Company contain statements that, to the extent they are not recitations of historical fact, constitute forward-looking statements within the meaning of federal securities law. Investors are cautioned that all forward-looking statements involve risks and uncertainties, and are based on assumptions that the Company believes in good faith are reasonable, but which may be materially different from actual results. Investors can identify these statements by the fact that they do not relate only to historic or current facts. The words “may,” “will,” “could,” “should,” “anticipate,” “believe,” “estimate,” “expect,” “forecast,” “intend,” “outlook,” “plan,” “project,” “scheduled,” and similar expressions in connection with future events or future operating or financial performance are intended to identify forward-looking statements. Any or all of the Company’s forward-looking statements in this Form 10‑K and in other publications may turn out to be wrong.

Statements and assumptions on future revenues, income and cash flows, performance, economic trends, the outcome of litigation, regulatory compliance, and environmental remediation cost estimates are examples of forward-looking statements. Numerous factors, including potentially the risk factors described in this section, could affect the Company's forward-looking statements and actual performance.

Investors are also cautioned that it is not possible to predict or identify all such factors. Consequently, the reader should not consider any such list to be a complete statement of all potential risks or uncertainties. Other factors besides those listed may also adversely affect the Company and may be material to the Company. The Company has listed the known material risks it considers relevant in evaluating the Company and its operations. The forward-looking statements in this document are intended to be subject to the safe harbor protection provided by Section 27A of the Securities Act of 1933 and Section 21E of the Exchange Act. These forward-looking statements are made as of the date hereof based on management’s current expectations, and the Company does not undertake an obligation to update such statements, whether as a result of new information, future events, or otherwise, other than as required by law.

For a discussion identifying some important factors that could cause actual results to vary materially from those anticipated in the forward-looking statements, see the factors listed below, along with the discussion of Competition under Item 1 of this Form 10-K, Management’s Discussion and Analysis of Financial Condition and Results of Operations under Item 7 of this Form 10-K, and Note A: Accounting Policies and Note N: Commitments and Contingencies of the Notes to Financial Statements of the Company’s consolidated financial statements included under Item 8, Financial Statements and Supplemental Data of this Form 10-K.

Industry Risk Factors

Our business depends on activity within the construction industry, which can be cyclical.

Economic and political uncertainty can impede growth in the markets in which we operate. Demand for our products, particularly in the private nonresidential and residential construction markets, could decline if companies and consumers are unable to obtain credit for construction projects or if an economic slowdown causes delays or cancellations of capital projects. State and federal budget issues sometimes undermine the funding available for infrastructure spending. The lack of available credit may limit the ability of states to issue bonds to finance construction projects. As a result of these issues, several of our top revenue-generating states, from time to time, stop bidding or slow bid projects in their transportation departments.

We sell most of our aggregates (our primary business) and our cement products to the construction industry and, therefore, our results depend on that industry’s strength. Since our businesses depend on construction spending, which can be cyclical, our profits are sensitive to national, regional and local economic conditions and the intensity of the underlying spending on aggregates and cement products. Construction spending is affected by economic conditions, changes in interest rates, inflation, employment levels, demographic and population shifts, and changes in construction budgets by federal, state and local governments. If economic conditions worsen, a recession in the construction industry may occur and affect the demand for our products. The recession of the late 2000s (the Great Recession) and continued decline in construction spending in the early 2010s were examples, and our shipment volumes were significantly reduced and remain below peak shipment levels, excluding the contribution of acquisitions. Construction spending can also be disrupted by terrorist activity and armed conflicts.

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While our business operations cover a wide geographic area, our earnings depend on the strength of the local economies in which we operate due to the high cost to transport our products relative to their selling price. If economic conditions and construction spending decline significantly in one or more areas, particularly in our Building Materials business’ top ten revenue-generating states of Texas, North Carolina, Colorado, California, Georgia, Florida, Minnesota, Arizona, South Carolina and Iowa, our profitability will decrease. We experienced this situation during the Great Recession.

Demand for aggregates products, particularly in the infrastructure construction market, is affected by federal, state and local budget and deficit issues. Remote working trends or other factors that reduce vehicle miles driven can have a negative impact on various revenue streams that fund roadway projects. Further, delays or cancellations of projects in the nonresidential and residential construction markets, which combined accounted for 58% of aggregates shipments in 2024, could occur if companies and consumers are unable to obtain financing for construction projects or if consumer confidence continues to be eroded by economic uncertainty.

Our Building Materials business is seasonal and subject to the weather, which can significantly impact operations.

The heavy-side construction business is conducted outdoors. Accordingly, erratic weather patterns, seasonal changes and other weather-related conditions affect our business. Adverse weather conditions, including hurricanes and tropical storms, extreme temperatures, snow, heavy or sustained rainfall, wildfires and earthquakes, reduce construction activity, restrict the demand for our products and impede our ability to efficiently transport material. Adverse weather conditions also increase our costs and reduce our production output as a result of power loss, needed plant and equipment repairs, time required to remove water from flooded operations and similar events. Severe drought conditions can restrict available water supplies and restrict production. Production and shipment levels of the Building Materials business’ products follow activity in the construction industry, which typically is strongest in the spring, summer and fall. Because of the weather’s effect on the construction industry’s activity, the production and shipment levels for our Building Materials business, including all of our aggregates-related downstream operations, vary by quarter. The second and third quarters are generally subject to heavy precipitation, and, thus, are more profitable if precipitation is lighter. The first and fourth quarters, which are subject to the impacts of winter weather, are generally the least profitable, but can be more profitable if the impact of winter weather is less. Our operations near the Atlantic Ocean and Gulf Coast regions of the United States and The Bahamas are at risk for hurricane activity, most notably in August, September and October. Our California operations are at risk for Pacific Ocean storms, wildfire activity and water use restrictions in the event of severe drought conditions. These weather events and conditions may be exacerbated by climate change in the near and long term.

Competition and Growth Risk Factors

Our Building Materials business depends on the availability of quality aggregates reserves or deposits and our ability to mine them economically.

Our challenge is to find quality aggregates deposits that we can mine economically, with appropriate permits, near either growing markets or long-haul transportation corridors that can economically serve applicable markets. As communities in many of our geographic markets have grown, they have settled in and around attractive quarrying locations and have imposed restrictions on mining. We try to meet this challenge by identifying and permitting sites prior to economic expansion, buying more land around our existing quarries to increase our mineral reserves, developing underground mines and expanding a distribution network that transports aggregates products by various methods, including rail and water. While our distribution network allows us to transport our products longer distances than would normally be considered economical, we can give no assurances that we will continue to be successful at this strategy.

Our businesses face many competitors.

Our businesses have many competitors, some of which are larger and have more resources than we do. Some of our competitors operate on a worldwide basis. Our results are affected by the number of competitors in a market, the production capacity that a particular market can accommodate, the pricing practices of other competitors and the entry of new competitors in a market. We also face competition for some of our products from alternative products. For example, our Magnesia Specialties business competes with other chemical products that could be used instead of our magnesia-based products. In addition, our aggregates, ready mixed concrete, asphalt and paving businesses compete with recycled asphalt and concrete products that could be used in certain applications instead of new products and our cement operations compete with

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international competitors who import products into the United States from jurisdictions with lower production and regulatory costs and burdens.

Our future growth depends in part on acquiring other businesses in our industry, and we have the ability to acquire businesses by paying all or in part with shares of our common stock.

We expect to continue to grow, in part, by acquiring other businesses. In the past, we have made acquisitions to strengthen our existing locations, expand our operations and enter new geographic markets. We will continue to pursue selective acquisitions, joint ventures or other business arrangements we believe will help our Company grow. However, the continued success of our acquisition program will depend on our ability to find and buy other attractive businesses at an appropriate price and our ability to integrate acquired businesses into our existing operations. We cannot assume there will continue to be attractive acquisition opportunities for sale at reasonable prices that we can successfully integrate into our operations.

We have the ability to pay all or part of the purchase price of any future acquisition with shares of our common stock. We also have the ability to use our stock to make strategic investments in other companies to complement and expand our operations. If we use our common stock in this way, the ownership interests of our existing shareholders at that time will be diluted and the price of our stock could decline. We operate our businesses with the objective of maximizing long-term shareholder return.

Our integration of the acquisition or business combination with other businesses may not be as successful as projected.

We have a successful history of business combinations and integration of these businesses into our heritage operations. However, in connection with the integration of any other business that we acquire, there is a risk that we will not be able to achieve such integration in a successful manner or on the time schedule we have projected or in a way that will achieve the level of synergies, cost savings or operating efficiencies we forecast from the acquisition.

Any significant business acquisition or combination we might choose to undertake may require that we devote significant management attention and resources to preparing for and then integrating our business practices and operations. Based on our history, we believe we would be successful in this integration process. Nevertheless, we may fail to realize some of the anticipated benefits of any potential acquisition or other business combination that we pursue in the future if the integration process takes longer or is more costly than expected. Potential difficulties we may encounter in the integration process include the following:

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Our acquisitions and divestitures could harm our results of operations.

In pursuing our business strategy, we conduct discussions, evaluate opportunities and enter into acquisition and divestiture agreements. Acquisitions involve significant challenges and risks, including risks that:

Divestitures also involve significant challenges and risks, including risks that:

Our cement and Magnesia Specialties businesses may become capacity-constrained.

If our cement or Magnesia Specialties businesses becomes and/or remains capacity-constrained, we may be unable to timely satisfy the demand for some of our products, and any resulting changes in customers would introduce volatility to the earnings of these segments. We can address capacity needs by enhancing our manufacturing productivity, increasing the operational availability of equipment, reducing machinery down time and extending machinery useful life. Future demand for our products may require us to expand our manufacturing capacity further, particularly through the purchase of additional manufacturing equipment. However, we may not be able to increase our capacity in time to satisfy increases in demand that may occur from time to time. Our Texas cement operation is capacity constrained from time to time, which may prevent us from satisfying customer orders and result in a loss of sales to competitors that are not capacity-constrained. In August 2024, we completed a finishing capacity expansion project at our Midlothian cement facility that added 0.45 million tons of annual incremental cement production capacity. However, we may suffer excess capacity if we increase our capacity to meet actual or anticipated demand and that demand decreases or does not materialize in a timely manner or at all.

Our cement business could suffer if cement or clinker imports from other countries significantly increase or are sold in the United States in violation of U.S. fair trade laws.

In the past, the U.S. cement industry has benefited from antidumping orders imposing duties on imports of cement and clinker from other countries that violated U.S. fair trade laws. Cement operators with import facilities can purchase cement from other countries, such as those in Latin America and Asia, which could compete with domestic producers. In addition, if environmental regulations increase the costs of domestic producers compared to foreign producers that are not subject to similar regulations, imported cement could achieve a significant cost advantage over domestically produced cement. An influx of cement or clinker products from countries not subject to antidumping orders, or sales of imported cement or clinker in violation of U.S. fair trade laws, could adversely affect our cement product line.

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Economic, Political and Legal Risk Factors

Changes in legal requirements and governmental policies concerning zoning, land use, the environment, health and safety and other areas of the law, as well as litigation relating to these matters, affect our businesses. Our operations expose us to the risk of material environmental liabilities.

Many federal, state and local laws and regulations relating to zoning, land use, air emissions (including carbon dioxide and other greenhouse gases), water use, allocation and discharges, waste management, noise and dust control, mining, land reclamation and other environmental, health and safety matters govern our operations. Some of our operations require permits, which may impose additional operating standards and are subject to modification, renewal and revocation. Certain of our operations may from time to time involve the use of substances that are classified as toxic or hazardous within the meaning of these laws and regulations. Despite our extensive efforts to remain in strict compliance at all times with all applicable laws and regulations, the risk of liabilities, particularly environmental liabilities, is inherent in the operation of our businesses. These potential liabilities could result in material costs, including fines or personal injury or damages claims, which could have an adverse impact on our operations and profitability.

Future events, including changes in existing laws or regulations or enforcement policies, or further investigation or evaluation of the potential health hazards of some of our products or business activities may result in additional or unanticipated compliance and other costs. We could be required to invest in preventive or remedial action, like pollution control facilities, which could be substantial or which could result in restrictions on our operations or delays in obtaining required permits or other approvals.

Our operations are subject to manufacturing, operating and handling risks associated with the products we produce and the products we use in our operations, including the related storage and transportation of raw materials, explosives, products, hazardous substances and wastes. We are exposed to hazards, including storage tank leaks, explosions, discharges or releases of hazardous substances, exposure to dust, and the operation of mobile equipment and manufacturing machinery.

These risks can subject us to potentially significant liabilities relating to personal injury, death or property damage, and may result in significant civil or criminal penalties, which could damage our productivity or profitability. For example, from time to time, we investigate and remediate environmental contamination relating to our prior or current operations, as well as operations we have acquired from others, and, in some cases, we have been or could be named as a defendant in litigation brought by governmental agencies or private parties to investigate or clean up such contamination.

We are involved from time to time in litigation and claims arising from our operations. While we do not believe the outcome of pending or threatened litigation will have a material adverse effect on our operations or our financial condition, an unexpected and material adverse outcome in a pending or future legal action could potentially have a negative effect on our Company.

Legislation or regulations to address climate change and transition to a low-carbon economy may adversely impact our business, including financial impacts.

A number of governmental bodies, including U.S. regulatory agencies and various U.S. states, have proposed, enacted or are contemplating legislative and regulatory changes to mitigate or address the potential impacts of climate change, including provisions for greenhouse gas (GHG) emissions reductions or the use of alternative fuels, carbon credits (such as a cap-and-trade system) and a carbon tax. For example, in the United States, the United States Environmental Protection Agency (USEPA) promulgated a mandatory reporting rule covering GHG emissions from sources considered to be large emitters. Our cement plant and our Magnesia Specialties plants are strictly regulated with respect to GHG emissions and hold Title V Permits under USEPA regulations, and each (other than the Manistee Michigan facility) is also subject to the U.S. Clean Air Act’s Prevention of Significant Deterioration (PSD) requirements which require a permit program for certain new or modified sources of emissions. If future modifications to our Magnesia Specialties or cement facilities require PSD review for other pollutants, GHG permitting requirements may also be triggered, which could require us to incur significant additional costs. It is not possible, however, to estimate the cost of any future requirements at this time.

Various states where we have operations have enacted or are considering climate change initiatives as well, and we have been and may continue to be subject to state regulations in addition to any federal laws and rules that are passed. For example, California has had a cap-and-trade program for emissions rights since 2012. In addition, in October 2023, California adopted its California Climate Accountability Package which includes annual reporting of Scope 1, Scope 2 and Scope 3 emissions on a

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phased-in implementation schedule, climate-related risk reporting for certain companies and heightened disclosure standards around net zero emissions claims, carbon-neutral claims or significant GHG emissions reduction claims and the purchase or use of voluntary carbon offsets used to achieve those claims. These and other state climate-related regulations may result in significantly higher compliance costs and risks.

In addition, although our aggregates, ready mixed concrete, asphalt and paving operations are not considered “major” sources of GHG emissions subject to the USEPA reporting rule, any additional regulatory restrictions on emissions of GHGs imposed by the USEPA would likely impact our magnesia-based chemicals operations in Woodville, Ohio, and Manistee, Michigan, as well as our cement operation in Texas, which in 2024 filed annual reports of GHG emissions as required by the USEPA reporting rule. We may not be able to recover any increased operating costs, taxes or capital investments (other than with respect to any carbon reduction or capture technologies) relating to GHG emission limitations at those plants from our customers in order to remain competitive in pricing in the relevant markets. Our businesses also are dependent on reliable sources of energy and fuels. We could incur increased costs or disruptions in our operations if climate change legislation and regulation (including regulatory changes with respect to alternative fuel use) or severe weather affect the price or availability of purchased energy or fuels or other materials used in our operations.

While we do not currently believe such requirements will have a material adverse effect on the financial condition or results of the operations of either the Magnesia Specialties business or Building Materials business, in light of the various regulatory uncertainties, the Company cannot presently predict the costs of any future compliance requirements. We continue to monitor GHG regulations and legislation and its potential impact on our business, financial condition and product demand.

Weather patterns may result in physical impacts that could have adverse effects on our operations or financial condition.

Given the nature of our operations, physical impacts of weather patterns may include disruptions in production, regional supply or product distribution networks, as well as negative impacts on the price or availability of purchased energy or fuels, due to major storm events or other severe weather, shifts in regional rainfall and temperature patterns and intensities, and flooding from sea level changes. In addition, production and shipment demand for our Building Materials business correlate with general construction activity and rely on road, rail and water transportation networks, most of which occurs outdoors and, as a result, is affected by erratic weather patterns, seasonal changes and other unusual or unexpected weather-related conditions, which can significantly affect that business. In our cement and downstream businesses, the physical impacts of weather patterns may result in disruptions to our operations and to our customers’ transportation activities, including impacts on production capabilities and capacities, supply chain interruptions and project delays, which can impact our reputation and result in additional costs to our Company. Excessive rainfall and other severe weather events also jeopardize production, shipments and profitability in all markets served by our Building Materials business. In particular, our operations in the Atlantic Ocean and Gulf Coast regions of the United States and The Bahamas are at risk for hurricane activity, most notably in August, September and October. In addition, our California operations are at risk for wildfires, which is exacerbated by drought, which may also result in water restrictions. Throughout 2024, unprecedented storms and flooding caused operational delays and challenges across much of the Company's geographic footprint. Inclement weather can also reduce the useful life of an asset. These and other weather-related risks, such as a downturn in the construction sector due to harsh weather, significant precipitation or other changes in weather, could impact our customers, which could lead to reduced demand for our products. We may not be able to pass on to our customers all the costs related to mitigating these risks.

Our business is dependent on funding from a combination of federal, state and local sources.

Our products are used in public infrastructure projects, which include the construction, maintenance and improvement of highways, streets, roads, bridges, schools and similar projects. Accordingly, our business is dependent on the level of federal, state and local government spending on these projects. We cannot be assured, however, of the amount and timing of appropriations for spending on infrastructure projects.

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Our businesses could be impacted by rising or sustained high interest rates.

Our operations are highly dependent upon the interest rate-sensitive construction and steelmaking industries. Therefore, our business in these industries may experience declines from sustained high or rising interest rates and cost increases.

Notably, demand in the residential construction market in which we sell our aggregates products is affected by interest rates. While the Federal Reserve lowered interest rates several times during 2024, they remain above historical levels. Sustained high interest rates may affect our business in an adverse manner. The residential construction market accounted for 23% of our 2024 aggregates shipments.

Rising interest rates could also result in disruptions in the credit markets, which could affect our business, as described in greater detail under " Disruptions in the credit markets could affect our business" risk factor.

Increases in our effective income tax rate may harm our results of operations.

A number of factors may increase our future effective income tax rate, including:

Any significant increase in our future effective income tax rate could reduce our net earnings and free cash flow for future periods.

Investor and stakeholder focus on climate change and sustainability matters and any related reporting obligations may impact our businesses.

Investors, other stakeholders, and U.S. and international regulators are often focused on climate change and sustainability matters. For example, new and proposed laws, regulations and investor and proxy advisory guidelines relating to and requiring disclosure of such matters, including those relating to sustainability, emissions, supply chain, and human capital management, are under consideration or being adopted, or may be proposed in the future. These requirements have resulted in and may continue to result in our need to make additional investments and implement new practices and reporting processes, all entailing management attention and additional compliance risk. Any failure or perceived failure to achieve or accurately report on our current or future sustainability-related commitments, including our GHG reduction and net zero ambition and targets, and any differences between our commitments and those of any companies to which we are compared, could harm our reputation, adversely affect our ability to effectively compete (including as a result of disclosure of proprietary information regarding our plants or changes in our ability to raise capital), adversely affect our recruitment and retention efforts or expose us to potential legal liability. In addition, while we are committed to pursuing our sustainability objectives, there is no assurance that we will achieve any of our sustainability goals or commitments, that low- or non-carbon-based energy sources and technologies required to meet long-term emissions reductions in some of the sectors in which we operate will be available at scale in the United States on an economically feasible basis or that we or our suppliers can meet sustainability, emissions reductions and other standards that are required by current or future laws or established as investment criteria, voting guidelines or activism triggers by our investors and other stakeholders. Failure to meet these commitments could result in reputational harm to our Company and changes regarding climate risk management and practices may result in higher regulatory and compliance risks and costs.

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Our businesses could be adversely affected by outbreak of disease, epidemic or pandemic, or similar public health threat, or fear of such an event and its related economic and societal response.

Our businesses could be negatively impacted by the widespread outbreak of an illness or other communicable disease, or any other public health crisis that results in economic and trade disruptions. Public health threats can negatively impact economic activity, consumer confidence and discretionary spending, and overall market conditions and these conditions could have an impact on our Company to the extent that they occur in regions where our Building Materials business principally operates. Further, outbreaks of illnesses could negatively affect the health of our employees, employee productivity, customer purchasing patterns and fulfillment of purchase orders, availability of supplies, pricing for raw materials and the ability to transport materials via the Company’s distribution network. We actively monitor public health situations as part of our health and safety measures to comply with federal, state and local mandates and to protect the health and safety of our employees. We may take further actions that alter our business operations, including any that may be required by federal, state or local authorities or that we determine are in the best interests of our employees, customers, suppliers, vendors, communities and other stakeholders as we adapt to public health events from time to time.

Personnel Risks

Labor disputes could disrupt operations of our businesses.

Labor unions represented 14% of the hourly employees of our Building Materials business and all of the hourly employees of our Magnesia Specialties business as of December 31, 2024. Our collective bargaining agreements for employees of our Magnesia Specialties business at the Woodville, Ohio, lime plant and the Manistee, Michigan magnesia chemicals plant expire in June 2026 and August 2027, respectively.

Disputes with our trade unions, or the inability to renew our labor agreements, could lead to work stoppages or other actions that could disrupt our businesses, raise costs and reduce revenues and earnings from the affected locations.

We depend on the recruitment and retention of qualified personnel, and our failure to attract and retain such personnel could adversely affect our business.

Our success depends to a significant degree upon the continued services of, and on our ability to attract and retain, our key personnel and executive officers, including qualified management, technical, marketing and sales, and support personnel. Competition for such personnel is intense, and we may not be successful in attracting or retaining such qualified personnel, which could negatively affect our business. In addition, because of our reliance on our senior management team, the unanticipated departure of any key member could have an adverse effect on our business. Our future success depends, in part, on our ability to identify and develop or recruit talent to succeed our senior management and other key positions throughout the organization. If we fail to identify and develop or recruit successors, we are at risk of being harmed by the departures of these key employees. Effective succession planning is also important to our long-term success. Failure to ensure effective transfer of knowledge and smooth transitions involving key employees could hinder our strategic planning and execution.

Our reputation, ability to do business and results of operations could be impaired by improper conduct by any of our employees, agents or business partners.

We are subject to regulation under a wide variety of U.S. federal and state and some non-U.S. laws, regulations and policies, including laws related to anticorruption, antibribery, export and import compliance, antitrust and money laundering, due to our operations. We cannot provide assurance that our compliance policies and internal controls will always protect us from the improper conduct of our employees, agents and business partners. Any violations of law or improper conduct could damage our reputation and, depending on the circumstances, subject us to, among other things, civil and criminal penalties, material fines, equitable remedies (including profit disgorgement and injunctions on future conduct), securities litigation and a general loss of investor confidence, any one of which could have a material adverse impact on our business prospects, financial condition, results of operations, cash flows and the market value of our stock.

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Investment returns on our pension assets may be lower than expected, or interest rates may decline, requiring us to make significant additional cash contributions to our benefit plans.

A portion of our current and former employees has accrued benefits under our defined benefit pension plans. Requirements for funding our pension plan liabilities are based on a number of actuarial assumptions, including the expected rate of return on our plan assets and the discount rate applied to our pension plan obligations. Fluctuations in equity market returns and changes in long-term interest rates could increase our costs under our defined benefit pension plans and may significantly affect future contribution requirements. It is unknown what the actual investment return on our pension assets will be in future years and what interest rates may be at any given point in time. We cannot therefore provide any assurance of what our actual pension plan costs will be in the future, or whether we will be required under applicable law to make future material plan contributions.

Financial, Accounting and Cost Management Risk Factors

Our business is capital intensive.

The property and machinery needed to produce our products are very expensive. Therefore, we require large amounts of cash to operate our businesses. We believe that our cash on hand, along with our projected operating cash flows and our available financing resources, is adequate to support our anticipated operating and capital needs. Our ability to generate sufficient cash flow depends on future performance, which will be subject to general economic conditions, industry cycles and financial, business and other factors affecting our operations, many of which are beyond our control. If we are unable to generate sufficient cash to operate our business, we may be required, among other things, to reduce or delay planned capital or operating expenditures.

Our earnings are affected by the application of accounting standards and our critical accounting policies, which involve subjective judgments and estimates by our management. Our estimates and assumptions could be wrong.

The accounting standards we use in preparing our financial statements are often complex and require that we make significant estimates and assumptions in interpreting and applying those standards. These estimates and assumptions involve matters that are inherently uncertain and require our subjective and complex judgments. If we used different estimates and assumptions or used different ways to determine these estimates, our financial results could differ.

While we believe our estimates and assumptions are appropriate, we could be wrong. Accordingly, our financial results could be different, either higher or lower. We urge you to read Critical Accounting Policies and Estimates included under Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations of the Form 10-K.

The adoption of new accounting standards may affect our financial results.

The accounting standards we apply in preparing our financial statements are reviewed by regulatory bodies and are periodically changed. New or revised accounting standards could, either positively or negatively, affect results reported for periods after adoption of the standards as compared with the prior periods, or require retrospective application changing results reported for prior periods. We urge you to read about our accounting policies and new accounting pronouncements in Note A: Accounting Policies of our consolidated financial statements included under Item 8, Financial Statements and Supplementary Data of this Form 10-K.

Reports from the Public Company Accounting Oversight Board’s (PCAOB) inspections of public accounting firms continue to outline findings and recommendations that could require these firms to perform additional work as part of their financial statement audits. Our costs to respond to these additional requirements may increase.

Impairment charges could have a material adverse effect on our financial results.

Goodwill and other certain acquired intangible assets expected to contribute indefinitely to our cash flows are not amortized, but must be evaluated for impairment by management at least annually. If the carrying value of a reporting unit exceeds its fair value, the reporting unit's goodwill is considered impaired and a non-cash charge to earnings is recorded for the difference. If the carrying value of an indefinite-lived intangible asset is greater than its fair value, the intangible asset is considered impaired and is reduced to fair value via a non-cash charge to earnings. Future events may occur that would adversely affect the fair value of our goodwill or other acquired intangible assets and require impairment charges. Such events may include,

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but are not limited to, lower-than-forecasted revenues or profitability, construction growth rates that fall below our assumptions, actions of key customers, increases in interest rates, continued economic uncertainty, higher levels of unemployment, weak consumer confidence, lower levels of discretionary consumer spending and a decline in the trading price of our common stock. We continue to evaluate the impact of economic and other developments to assess whether impairment indicators are present. Accordingly, we may be required to perform impairment tests based on changes in the economic environment and other factors, and these tests could result in impairment charges in the future.

Disruptions in the credit markets could affect our business.

Demand for aggregates products, particularly in the infrastructure construction market, has historically been negatively affected by federal and state budget challenges and the uncertainty over future highway funding levels. Further, delays to or cancellations of capital projects in the nonresidential and residential construction markets could occur if companies and consumers are unable to obtain financing for construction projects or if consumer confidence is eroded by economic uncertainty.

A recessionary construction economy can also increase the likelihood we will not be able to collect all our accounts receivable from our customers. While we are protected in part by payment bonds posted by many of our customers or end-users, as well as statutory lien rights, we have experienced delays in payment from some of our customers during downturns especially in the construction markets and expect that we would experience such delays in the future, which would negatively affect operating cash flows.

The credit environment could impact our ability to borrow money in the future. Additional financing or refinancing might not be available and, if available, may not be at economically favorable terms. Further, an increase in leverage could lead to deterioration in our credit ratings. A reduction in our credit ratings, regardless of the cause, could also limit our ability to obtain additional financing and/or increase our cost of obtaining financing. There is no guarantee we will be able to access the capital markets at financially economical interest rates, which could negatively affect our business.

We may be required to obtain financing in order to fund certain strategic acquisitions, if they arise, or to refinance our outstanding debt or for other corporate purposes. It is possible a large strategic acquisition would require that we issue new equity and debt securities in order to maintain our investment-grade credit rating and could result in a ratings downgrade notwithstanding our issuance of equity securities to fund the transaction. We are also exposed to risks from tightening credit markets, through the interest payable on any variable-rate debt, including the interest cost on future borrowings under our credit facilities. While we believe our credit ratings will remain at a composite investment-grade level, we cannot be assured these ratings will remain at those levels. Also, while we believe the Company will continue to have adequate credit available to meet its needs, there can be no assurance that such credit will be available on acceptable terms or on a timely basis.

Our Magnesia Specialties business faces currency risks from its overseas activities.

Our Magnesia Specialties business sells some of its products outside the United States. Therefore, the operations of the Magnesia Specialties business are affected from time to time by the fluctuating values of the currency exchange rates of the countries in which it does business in relation to the value of the U.S. Dollar. The business tries to mitigate the short-term effects of currency exchange rates by denominating sales in the U.S. Dollar. This still leaves the business subject to certain risks, depending on the strength of the U.S. Dollar.

Unexpected equipment failures, catastrophic events and scheduled maintenance may lead to production curtailments or shutdowns.

Our manufacturing processes are dependent upon critical pieces of equipment, such as our kilns and finishing mills. This equipment, on occasion, is out of service as a result of planned or unplanned maintenance, failures or damage during accidents. In addition to equipment failures, our facilities are also subject to the risk of catastrophic loss due to unanticipated events, such as fires, explosions or violent weather conditions. We have scheduled outages that can range from one to several weeks at least once a year to refurbish our cement and dolomitic lime production facilities. In 2024, our cement and Magnesia Specialties operations incurred shutdown costs of $22 million and $9 million, respectively. Any significant interruption in production capability may require us to make significant capital expenditures to remedy problems or damage as well as cause us to lose revenue due to lost production time.

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Our paving operations present additional risks to our business.

Our paving operations face challenges when our contracts have penalties for late completion. In some instances, including many of our fixed-price contracts, we guarantee project completion by a certain date. If we subsequently fail to complete the project as scheduled, we may be held responsible for costs resulting from the delay, generally in the form of contractually agreed-upon liquidated damages. Under these circumstances, the total project cost could exceed our original estimate, and we could experience a lower profit or a loss on the project. In our paving operations, we also have fixed-price and fixed-unit-price contracts where our profits can be adversely affected by a number of factors beyond our control, which can cause our actual costs to materially exceed the costs estimated at the time of our original bid. These same issues and risks can also impact some of our contracts in our asphalt and ready mixed concrete operations. These risks are somewhat mitigated by the fact that a majority of our road paving contracts are for short-term projects.

Our ready mixed concrete and asphalt and paving product lines have lower profit margins and operating results can be more volatile.

Our ready mixed concrete and asphalt and paving operations typically generate lower profit margins than our aggregates and cement operations due to potentially volatile input costs, highly competitive market dynamics and lower barriers to entry. To reduce our exposure to fluctuations in raw materials costs, we divested 20 ready mixed concrete plants serving the Austin and San Antonio, Texas regions in February 2024.

Suppliers, Raw Materials and Energy Costs Risk Factors

Short supplies and high costs of fuel, energy and raw materials affect our businesses.

Our businesses require a continued supply of diesel fuel, natural gas, coal, petroleum coke and other energy. Our financial results have historically been affected by the short supply or high costs of these fuels and energy. Changes in energy costs also affect the prices that we pay for related supplies, including explosives, conveyor belting and tires. While we can contract for some fuels and sources of energy, such as fixed-price supply contracts for natural gas, coal and petroleum coke, significant increases in costs or reduced availability of these items have and may in the future reduce our financial results. Moreover, fluctuations in the supply and costs of these fuels and energy can make planning for our businesses more difficult. Because of the fluctuating trends in diesel fuel prices, we may enter into fixed-price fuel agreements from time to time for a portion of our diesel fuel to reduce our diesel fuel price risk.

Cement production requires large amounts of energy, including electricity and fossil fuels. Therefore, the cost of energy is one of our largest expenses. Prices for energy are subject to market forces largely beyond our control and can be volatile. Cost increases that we are unable to pass through to the customer in the form of price increases for our products or disruption of the uninterrupted supply of fuel and electricity could adversely affect us. Accordingly, energy cost volatility can adversely affect the financial results of our cement business. The Midlothian cement operation has fixed-price agreements for a portion of its anticipated 2025 coal, electricity and natural gas needs.

Similarly, our downstream operations also require a continued supply of liquid asphalt and cement, which serve as key raw materials in the production of hot mix asphalt and ready mixed concrete, respectively. Some of these raw materials we produce internally, but most are purchased from third parties. These purchased raw materials are subject to potential supply constraints and significant price fluctuations, which are beyond our control. The financial results of our ready mixed concrete and asphalt and paving operations have been affected by the short supply or high costs of these raw materials. We generally see frequent volatility in the prices for these raw materials.

Our Magnesia Specialties business has fixed-price agreements for 43% of its anticipated 2025 coal, petroleum coke and natural gas needs.

Cement is sensitive to supply and price volatility.

Cement competition is often based primarily on price, which is highly sensitive to changes in supply and demand. Prices fluctuate significantly in response to relatively minor changes in supply and demand, general economic conditions and other market conditions, which we cannot control. When cement producers increase production capacity or more cement is imported into the market, an oversupply of cement in the market may occur if supply exceeds demand. In that case, cement prices generally decline. We cannot be assured that prices for our cement products will not decline in the future or that such decline will not have a material adverse effect on our cement product line.

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Our Magnesia Specialties business depends in part on the steel industry and the supply of reasonably priced fuels.

Our Magnesia Specialties business sells some of its products to companies in the steel industry. Accordingly, this business is dependent, in part, on the strength of the cyclical steel industry. Our Magnesia Specialties business also requires significant amounts of natural gas, coal and petroleum coke, and financial results are negatively affected by increases in fuel prices or shortages.

Cyber and Information Security Risk Factors

We are dependent on information technology and our systems and infrastructure face certain risks, including cybersecurity risks and data leakage risks.

We rely on information technology systems and networks, some of which are managed by third-party vendors, including cloud-based systems and managed service providers, to operate our business and to securely process, store and transmit confidential, sensitive and proprietary information relating to our business operations including sensitive information about our customers and employees. Cyber threats are rapidly evolving as threat actors have become increasingly sophisticated and carry out direct large-scale, complex attacks against a company and are reportedly using artificial intelligence to increase the virulence of attacks. In addition, we have relied on our information technology infrastructure to support remote work from time to time and may need to do so in the future, which can increase cyber risks. We are not able to anticipate or prevent all such attacks and could be held liable for any resulting material security breach or data loss. In addition, it is not always possible to deter or detect misconduct by employees or third-party vendors.

While we have experienced attacks to breach the security of our information technology systems, we are not aware that we have experienced a material cybersecurity incident during the 2024 fiscal year. Breaches of our technology systems, or those of our vendors and customers, whether from circumvention of security systems, denial-of-service attacks or other cyber-attacks, hacking, “phishing” or "quishing" attacks, computer viruses, ransomware or malware, employee or insider error, malfeasance, social engineering, vendor software supply chain compromises, physical breaches or other actions, may result in manipulation or corruption of sensitive data, material interruptions or malfunctions in our Company’s or such vendors’ and customers’ websites, applications, data processing and certain products and services, or disruption of other business operations. Furthermore, any such breaches could compromise the confidentiality and integrity of material information held by our Company (including information about our business, employees or customers), as well as sensitive personally identifiable information, the disclosure of which could lead to identity theft and liability under data privacy laws. Breaches of our products that rely on technology and internet connectivity can expose our Company to product and other liability risk and reputational harm. Measures that we take to avoid, detect, mitigate or recover from material incidents may be insufficient, circumvented, or may become ineffective.

We have invested and continue to invest in risk management and information security and data privacy measures in order to protect our systems and data, including employee training, organizational investments, incident response plans, table top exercises and technical defenses. The cost and operational consequences of implementing, maintaining and enhancing further data or system protection measures could increase significantly to overcome increasingly intense, complex and sophisticated global cyber threats. Despite our best efforts, we are not fully insulated from data breaches and system disruptions. In addition, we are subject to complex and evolving laws, rules and regulations related to cybersecurity. These laws or regulations may be subject to uncertain or inconsistent interpretations and enforcement.

Any material breaches of cybersecurity, including the accidental loss, inadvertent disclosure or unapproved dissemination of proprietary information or sensitive or confidential data, or failure or perceived failure by us to comply with applicable laws, rules, or regulations, or any media reports of perceived security vulnerabilities to our systems, products and services or those of third parties relied upon by our Company could cause us to experience reputational harm, loss of customers and revenue, fines, regulatory actions and scrutiny, sanctions or other statutory penalties, litigation, liability for failure to safeguard our customers’ information or financial losses that are either not insured against or not fully covered through any insurance maintained by our Company. The report, rumor or assumption regarding a potential breach may have similar results, even if no breach has been attempted or occurred. Any of the foregoing may have a material adverse effect on our business, operating results and financial condition.

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Other Risk Factors

Delays or interruptions in shipping products of our businesses could affect our operations.

Transportation logistics play an important role in allowing us to supply products to our customers, whether by road, rail or water. We also rely heavily on third-party truck and rail transportation to ship coal, natural gas and other fuels to our plants. Any significant delays, disruptions or the non-availability of our transportation support system could negatively affect our operations. Transportation operations are subject to capacity constraints, high fuel costs and various hazards, including extreme weather conditions and slowdowns due to labor strikes and other work stoppages. In Texas, we compete for third-party trucking services with operations in the oil and gas fields, which can significantly constrain the availability of those services to us. If there are material changes in the availability or cost of transportation services, we may not be able to arrange alternative and timely means to transport our products or fuels at a reasonable cost, which could lead to interruptions or slowdowns in our businesses or increases in our costs.

The availability of railcars can also affect our ability to transport our products. Railcars can be used to transport many different types of products across all of our segments. If owners sell or lease railcars for use in other industries, we may not have enough railcars to transport our products.

We have agreements with shipping companies to provide ships to transport our aggregates products from our Bahamas and Nova Scotia operations to various coastal ports that expire in 2026 and 2027, respectively. Our inability to renew these agreements or enter into new ones with other shipping companies could affect our ability to transport our products.

Some of our products are distributed by barges along rivers in Ohio and West Virginia. We may experience, to a lesser degree, risks associated with distributing our products by barges, including significant delays, disruptions or the non-availability of our barge transportation system that could negatively affect our operations, water levels that could affect our ability to transport our products by barge, and barges that may not be available in quantities that we might need from time to time to support our operations.

Our articles of incorporation and bylaws and North Carolina law may inhibit a change in control that you may favor.

Our restated articles of incorporation and restated bylaws and North Carolina law contain provisions that may delay, deter or inhibit a future acquisition of us not approved by our Board of Directors. This could occur even if our shareholders are offered an attractive value for their shares or if many or even a majority of our shareholders believe the takeover is in their best interest. These provisions are intended to encourage any person interested in acquiring us to negotiate with and obtain the approval of our Board of Directors in connection with the transaction. Provisions that could delay, deter or inhibit a future acquisition include the following:

Additionally, the occurrence of certain change-of-control events could result in an event of default under certain of our existing or future debt instruments.

ITEM 1B – UNRESOLV ED STAFF COMMENTS

There are no unresolved written comments that were received from the staff of the SEC one hundred and eighty (180) days or more before the end of the Company's fiscal year relating to its periodic or current reports under the Exchange Act.

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I TEM 1C – CYBERSECURITY

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ITEM 2 – P ROPERTIES

Building Materials Business

As of December 31, 2024, the Company processed or shipped aggregates from 389 quarries, mines and distribution yards in 28 states, Canada and The Bahamas. No individual quarry or mine is material to the Company’s business or financial condition. The Company’s aggregates reserves, on average, represent more than 85 years at the 2024 annual production level. However, certain locations may be subject to more limited reserves and may not be able to expand. As of December 31, 2024, the Company operated 78 aggregates distribution yards. In total, aggregates locations (quarries, mines and distribution yards) include 191 located on land owned by the Company free of major encumbrances, 121 on leased land, 64 on land owned in part and leased in part and 13 on facilities neither owned nor leased where raw materials are removed under an agreement. In addition, as of December 31, 2024, the Company processed and shipped ready mixed concrete and asphalt products from 110 properties in five states, of which 84 are located on land owned by the Company free of major encumbrances, 22 are on leased land and 4 are on land owned in part and leased in part.

An overview of the Company’s quarrying and mining operations is included in Business—Building Materials Business and Business—Environmental and Governmental Regulations included in Item 1, Business of this Form 10-K, which is incorporated herein by reference. The following map presents the locations of these quarries and underground mines as of December 31, 2024:

Mineral reserves and mineral resources for the Company’s aggregates and cement businesses have been prepared in accordance with the disclosure requirements of subpart 1300 of U.S. Securities and Exchange Commission Regulation S-K. Mineral resources represent concentrations or occurrences of material of economic interest in or on the Earth's crust in such form, grade or quality, and quantity that there are reasonable prospects for economic extraction. A mineral resource is a

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reasonable estimate of mineralization, taking into account relevant factors such as cut-off grade, likely mining dimensions, location or continuity, that, with the assumed and justifiable technical and economic conditions, is likely to, in whole or in part, become economically extractable. A measured mineral resource is that part of the mineral resource for which quantity and grade or quality are estimated on the basis of conclusive geological evidence and sampling in sufficient detail to support detailed extraction planning and final evaluation of the economic viability of the deposit to be quarried or mined. An indicated mineral resource is that part of a mineral resource for which quantity and grade or quality are estimated on the basis of adequate geological evidence and sampling in sufficient detail to support mine planning and evaluation of the economic viability of the deposit of the material to be quarried or mined. Inferred mineral resources are that part of a mineral resource for which quantity and grade or quality are estimated on the basis of limited geological evidence and sampling.

A mineral reserve is an estimate of tonnage and grade or quality of indicated and measured mineral resources that, in the opinion of the qualified person, can be the basis of an economically viable project. More specifically, it is the economically mineable part of a measured or indicated mineral resource, which includes diluting materials and allowances for losses that may occur when the material is mined or extracted. A probable mineral reserve is the economically mineable part of an indicated and, in some cases, a measured mineral resource. A proven mineral reserve is the economically mineable part of a measured mineral resource and can only result from the conversion of a measured mineral resource. The Company estimates proven and probable mineral reserves based on the results of drilling and testing completed by or under the supervision of qualified persons.

The Company uses various exploratory drilling methods, depending on the type of deposit, to estimate mineral reserves that are economically mineable. The extent of drilling varies depending on the complexity of the mineral deposit and whether the location is a potential new site (greensite), an existing location or a potential acquisition. More extensive drilling is performed for potential greensites and acquisitions, and, in certain cases, the Company may rely on existing geological data or results of prior drilling by reputable third parties. Subsequent to drilling, selected drill samples are tested by an accredited laboratory for soundness, abrasion resistance and other physical properties relevant to the aggregates industry. If the mineral reserves meet the Company’s standards and are economically mineable, they are either leased or purchased. Once in operation, routine quality control testing is performed to ensure the quality grade of aggregates continues to meet specifications.

In determining the amount of reserves, evaluations are completed by or under the supervision of qualified Company personnel using industry best practices and internal controls defined by the Company. Reserve estimates represent net tons after consideration of applicable losses incurred during mining and plant processing. The Company’s policy is to exclude from reserve estimates the portions of a mineral deposit that are not available due to property boundaries, set-backs and plant configurations, as deemed appropriate when estimating reserves. The Company uses the same methods of analysis to evaluate and estimate the amount of its mineral reserves used in the cement manufacturing process for its cement operations as it does for its aggregates operations. For additional information on the Company’s assessment of reserves, see Management’s Discussion and Analysis of Financial Condition and Results of Operations – Other Financial Information - Critical Accounting Policies and Estimates - Property, Plant and Equipment included under Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations of this Form 10-K. While the mineral reserve and resource classification categories (proven and probable) identify relative confidence of reserve estimates, there is inherent risk associated with such estimates. The Company bases estimates on the information known at the time of determination and regularly reevaluates reserves whenever new information indicates a material change in reserves at one of the Company’s sites.

In general, quarry and mining facilities must comply with air quality, water quality, noise regulations, zoning and special-use permitting requirements, applicable mining regulations, and federal health and safety requirements. As new quarry and mining sites are located and acquired, the Company works closely with local authorities during the zoning and permitting processes to design new quarries and mines in such a way as to minimize disturbances. The Company frequently acquires large tracts of land so that quarry, mine and production facilities can be situated substantial distances from surrounding property owners.

Set forth in the tables below are the Company’s estimates as of December 31, 2024 of proven and probable mineral reserves of aggregates (crushed stone and sand and gravel) and measured, indicated and inferred mineral resources of aggregates (exclusive of proven and probable reserves), shown on a geographic division basis. The East Division includes Alabama, Florida, Georgia, Maryland, North Carolina, Pennsylvania, South Carolina, Tennessee, Virginia, Canada and The Bahamas. The Central Division includes Indiana, Iowa, Kansas, Kentucky, Minnesota, Missouri, Nebraska, Ohio, Tennessee and West Virginia. The Southwest Division includes Arkansas, Louisiana, Oklahoma and Texas. The West Division includes Arizona, California, Colorado, Utah, Washington and Wyoming. The reserve estimates shown were determined to be economically mineable using a reasonable and justifiable price for salable product based on the average selling price for the year ended December 31, 2023

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with respect to each division for each product category of aggregates resources. The Company’s estimate of resources and reserves of aggregates shown in the tables below includes resources and reserves that would be devoted for use in the Company’s cement product line and Magnesia Specialties business.

Summary Mineral Resources At End of Fiscal Year Ended December 31, 2024 1,2
	Measured Mineral Resources				Indicated Mineral Resources				Measured + Indicated Mineral Resources				Inferred Mineral Resources
	Tons (in thousands)			Grades/Qualities	Tons (in thousands)			Grades/Qualities	Tons (in thousands)			Grades/Qualities	Tons (in thousands)			Grades/Qualities
Crushed Stone
East Division		144,299		Crushed Stone		442,984		Crushed Stone		587,283		Crushed Stone		695,850		Crushed Stone
Central Division		—		Crushed Stone		22,730		Crushed Stone		22,730		Crushed Stone		—		Crushed Stone
Southwest Division		—		Crushed Stone		—		Crushed Stone		—		Crushed Stone		—		Crushed Stone
West Division		61,320		Crushed Stone		7,572		Crushed Stone		68,892		Crushed Stone		—		Crushed Stone
Total crushed stone		205,619				473,286				678,905				695,850
Sand & Gravel
East Division		—		Sand & Gravel		—		Sand & Gravel		—		Sand & Gravel		11,270		Sand & Gravel
Central Division		1,102		Sand & Gravel		35,390		Sand & Gravel		36,492		Sand & Gravel		—		Sand & Gravel
Southwest Division		—		Sand & Gravel		—		Sand & Gravel		—		Sand & Gravel		—		Sand & Gravel
West Division		68,839		Sand & Gravel		125,091		Sand & Gravel		193,930		Sand & Gravel		—		Sand & Gravel
Total sand & gravel		69,941				160,481				230,422				11,270

Summary Mineral Reserves At End of Fiscal Year Ended December 31, 2024 1,2

Proven Mineral Reserves

Probable Mineral Reserves

Total Mineral Reserves

Tons (in thousands)

Grades/Qualities

Tons (in thousands)

Grades/Qualities

Tons (in thousands)

Grades/Qualities

Crushed Stone

East Division

4,510,536

Crushed Stone

4,181,925

Crushed Stone

8,692,461

Crushed Stone

Central Division

1,546,300

Crushed Stone

1,219,615

Crushed Stone

2,765,915

Crushed Stone

Southwest Division

1,999,687

Crushed Stone

1,506,529

Crushed Stone

3,506,216

Crushed Stone

West Division

413,766

Crushed Stone

526,325

Crushed Stone

940,091

Crushed Stone

Total crushed stone

8,470,289

7,434,394

15,904,683

Sand & Gravel

East Division

87,809

Sand & Gravel

98,374

Sand & Gravel

186,183

Sand & Gravel

Central Division

211,857

Sand & Gravel

94,472

Sand & Gravel

306,329

Sand & Gravel

Southwest Division

52,373

Sand & Gravel

146,416

Sand & Gravel

198,789

Sand & Gravel

West Division

227,561

Sand & Gravel

16,522

Sand & Gravel

244,083

Sand & Gravel

Total sand & gravel

579,600

355,784

935,384

The following presents the Company’s total annual production for the last three years shown on a product line-by-product line basis.

		Total Annual Production (tons in millions) For year ended December 31
		2024				2023				2022
Aggregates			190.8				208.5				214.5
Cement limestone			3.3				6.1				6.6
Magnesia Specialties limestone			3.1				3.5				2.9
Total			197.2				218.1				224.0

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Cement

As of December 31, 2024, the Company processed or shipped cement from three properties, all of which are located on land owned by the Company free of major encumbrances, in Midlothian, Texas, south of Dallas/Fort Worth. The following table summarizes certain information about the Company’s cement production facility, at December 31, 2024:

Plant

Rated Annual Productive Capacity-Tons of Clinker (in millions)

Manufacturing Process

Service Date

Internally Estimated Reserves—Years

Midlothian, TX

2.4

Dry

2001

60

Reserves identified with the facility shown above are contained on approximately 1,400 acres of land owned by the Company. As of December 31, 2024, the Company estimated its total proven and probable limestone reserves on such land to be approximately 215 million tons, which are included in the Summary Mineral Reserves table.

The Company’s cement manufacturing facility includes kilns, crushers, pre-heaters/calciners, coolers, finish mills and other equipment used to process limestone and other raw materials into cement, as well as equipment used to extract and transport the limestone from the adjacent quarries. This cement manufacturing facility is served by rail and truck.

As of December 31, 2024, the Company also operated, directly or through third parties, 2 cement distribution terminals.

Magnesia Specialties Business

The Magnesia Specialties business currently operates major manufacturing facilities in Manistee, Michigan, and Woodville, Ohio. Both of these facilities are owned.

Other Properties

The Company’s principal corporate office, which it leases, is located in Raleigh, North Carolina. The Company owns and leases various administrative offices for its five operating business segments.

Condition and Utilization

The Company’s principal properties, which are of varying ages and construction types, are believed to be generally in good condition, are generally well maintained, and are generally suitable and adequate for the purposes for which they are used.

During 2024, the principal properties of the aggregates operations were believed to be utilized at average productive capacities of approximately 71% and were capable of supporting a higher level of market demand. The Company adjusts its production schedules to meet volume demand for its products.

During 2024, the Midlothian, Texas cement kiln operated on average at 72% utilization. The cement business’ leadership, in collaboration with the aggregates and ready mixed concrete teams, has developed strategic plans regarding inter-plant efficiencies, as well as tactical plans addressing plant utilization and efficiency.

The Company’s Magnesia Specialties business expects future organic profit growth to result from increased pricing, commercialization of new products, entry into new or adjacent markets and optimization of overall product mix. Any unplanned change in costs or customers introduces volatility to the earnings of the Magnesia Specialties segment. The dolomitic lime business of the Magnesia Specialties segment operated at 73% utilization in 2024.

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ITEM 3 – LEGAL PROCEEDINGS

From time to time, claims of various types are asserted against the Company arising out of its operations in the normal course of business, including claims relating to land use and permits, safety, health, and environmental matters (such as noise abatement, blasting, vibrations, air emissions and water discharges). Such matters are subject to many uncertainties, and it is not possible to determine the probable outcome of, or the amount of liability, if any, from these matters. In the opinion of management of the Company (which opinion is based in part upon consideration of the opinion of counsel), based upon currently-available facts, it is remote that the ultimate outcome of any litigation and other proceedings will have a material adverse effect on the overall results of the Company's operations, its cash flows or its financial condition. However, management cannot assure that an adverse outcome in any of such litigation would not have a material adverse effect on the Company or its operating segments.

The Company was not required to pay any penalties in 2024 for failure to disclose certain “reportable transactions” under Section 6707A of the Internal Revenue Code.

See also Note N: Commitments and Contingencies of the Notes to Financial Statements of the Company’s consolidated financial statements included under Item 8, Financial Statements and Supplemental Data of this Form 10-K and the Environmental Regulation and Litigation section included under Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations of this Form 10-K.

ITEM 4 – MINE SAFE TY DISCLOSURES

The information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K (17 CFR 229.104) is included in Exhibit 95 to this Form 10-K.

In formation about our Executive Officers

The following sets forth certain information regarding the executive officers of Martin Marietta as of February 21, 2025:

Name	Age	Present Position	Year Assumed Present Position	Other Positions and Other Business Experience Within the Last Five Years
C. Howard Nye	62	Chair of the Board,	2014
		Chief Executive Officer,	2010
		President,	2006
		President of Aggregates Business,	2010
		Chair of Magnesia Specialties Business	2007
James A. J. Nickolas	54	Executive Vice President, Chief Financial Officer	2023	Senior Vice President, Chief Financial Officer (2017-2023)
Roselyn R. Bar	66	Executive Vice President	2015	General Counsel (2001-2024); Corporate Secretary (1997-2024)
Donald A. McCunniff	67	Executive Vice President, Chief Human Resources Officer	2024
Oliver W. Brooks	39	Senior Vice President, Enterprise Excellence	2022	Vice President, Strategic Planning for Southwest Division (2020-2022); General Manager, North Texas/Oklahoma District (2018-2020)
Robert J. Cardin	61	Senior Vice President, Controller and Chief Accounting Officer	2019
Bradley D. Kohn	56	Senior Vice President, General Counsel and Corporate Secretary	2024	Senior Vice President, General Counsel, Head of Government Affairs and Corporate Secretary, Wolfspeed Inc. (2013-2024)
Michael J. Petro	41	Senior Vice President, Strategy & Development	2021	Vice President, Strategy and Development (2018-2021)

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PART II

ITEM 5 – MARKET FOR REGISTRAN T’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information and Holders

The Company’s common stock, $0.01 par value, is traded on the New York Stock Exchange (NYSE) (Symbol: MLM). There were 652 holders of record of the Company’s common stock as of February 17, 2025.

Common Stock Performance Graph

The following graph and accompanying table compare the five-year cumulative total return from December 31, 2019 to December 31, 2024 for (a) the Company’s common stock, (b) the Standard & Poor’s 500 Index, and (c) the Standard & Poor’s 500 Materials Index.

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Recent Sales of Unregistered Securities

None.

Issuer Purchases of Equity Securities

Period		Total Number of Shares Purchased				Average Price Paid per Share				Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (1)				Maximum Number of Shares that May Yet be Purchased Under the Plans or Programs
October 1, 2024 — October 31, 2024			—			$	—				—				11,935,338
November 1, 2024 — November 30, 2024			—			$	—				—				11,935,338
December 1, 2024 — December 31, 2024			—			$	—				—				11,935,338
Total			—			$	—				—				11,935,338

ITEM 6 – RESERVED

Not required.

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ITEM 7 – MANAGEMENT’S DISCUSSI ON AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

INTRODUCTORY OVERVIEW

Martin Marietta Materials, Inc. (the Company or Martin Marietta) is a natural resource-based building materials company, with 2024 revenues of $6.5 billion and 2024 net earnings from continuing operations attributable to Martin Marietta of $2.0 billion, inclusive of a $976 million after-tax nonrecurring gain on the divestiture of the Company's South Texas cement plant and related ready mixed concrete operations (the Divestiture). These results were achieved in part by supplying aggregates (crushed stone, sand and gravel) through its network of approximately 390 quarries, mines and distribution yards in 28 states, Canada and The Bahamas. Martin Marietta also provides cement and downstream products, namely ready mixed concrete, asphalt and paving services, in certain markets where the Company has a leading aggregates position. Specifically, the Company has one cement plant and two cement distribution facilities in Texas, ready mixed concrete operations in Arizona and Texas, and asphalt operations in Arizona, California, Colorado and Minnesota. Paving services are offered in California and Colorado.

The Company’s heavy-side building materials are used in infrastructure, nonresidential and residential construction projects. Aggregates are also used in agricultural, utility and environmental applications and as railroad ballast. The aggregates, cement, ready mixed concrete and asphalt and paving product lines are reported collectively as the “Building Materials” business.

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As more fully discussed in the Strategic Objectives section, geography is critically important for the Building Materials business. The Company conducts its Building Materials business through two reportable segments, organized by geography: East Group and West Group. The East Group, consisting of the East and Central divisions, provides aggregates and asphalt products. The West Group is comprised of the Southwest and West divisions and provides aggregates, cement, ready mixed concrete, asphalt and paving services.

The following ten states accounted for 81% of the Building Materials business 2024 revenues: Texas, North Carolina, Colorado, California, Georgia, Florida, Minnesota, Arizona, South Carolina and Iowa.

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Magnesia Specialties

The Company operates a Magnesia Specialties business with production facilities in Michigan and Ohio. The Magnesia Specialties business produces magnesia-based chemicals products used in industrial, agricultural and environmental applications. It also produces dolomitic lime sold primarily to customers for steel production and soil stabilization. Magnesia Specialties’ products are shipped to customers domestically and worldwide.

Strategic Objectives

The Company’s strategic planning process, or S trategic O perating A nalysis and R eview (SOAR), provides the framework for execution of Martin Marietta’s long-term strategic plan. Guided by this framework and considering the cyclicality of the Building Materials business, the Company determines capital allocation priorities to maximize long-term shareholder value creation. The Company’s strategy includes ongoing evaluation of aggregates-led opportunities of scale in new domestic markets ( i.e. , platform acquisitions) and expansion through acquisitions that complement existing operations ( i.e. , bolt-on acquisitions). The Company finances such opportunities with the goal of preserving its financial flexibility by having a leverage ratio (consolidated net debt to consolidated earnings before interest, taxes, depreciation, depletion and amortization, earnings/loss from nonconsolidated equity affiliates and certain other adjustments as specified in the Results of Operations section, or Adjusted EBITDA) within a range of 2.0 times to 2.5 times within a reasonable period of time (typically within 18 months) following the completion of a debt-financed transaction. SOAR also includes the identification and potential disposition of assets that are not consistent with stated strategic goals. Notably, the Company completed nearly $6.0 billion worth of portfolio-optimizing transactions in 2024, divesting non-strategic cement and related ready mixed concrete businesses and redeploying the net proceeds into aggregates-led acquisitions in attractive markets (see Note B to the consolidated financial statements).

The Company, by purposeful design, will continue to be an aggregates-led business that focuses on markets with strong, underlying growth fundamentals where it can sustain or achieve a leading market position. Aggregates gross profit represented 76% of 2024 total reportable segment gross profit. For Martin Marietta, strategic cement and targeted downstream operations are located where the Company has, or envisions, among other things, a clear path toward a leading aggregates position. Additionally, strategic cement operations are geared toward markets in which supply cannot be meaningfully interdicted by waterborne product deliveries.

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Generally, the Company’s building materials are both sourced and sold locally. As a result, geography is critically important when assessing market attractiveness and growth opportunities. Attractive geographies generally exhibit (a) population growth and/or high population density, both of which are drivers of heavy-side building materials consumption; (b) business and employment diversity, drivers of greater economic stability; and (c) a superior state financial position, a driver of public infrastructure investment.

Population growth and density are typically assessed based on a site’s proximity to one of the megaregions in the United States. Megaregions are large networks of metropolitan population centers covering thousands of square miles. According to America 2050 , a planning and policy program of the Regional Plan Association, most of the nation’s population and economic growth through 2050 will occur in 11 megaregions. The Company has a meaningful presence in ten megaregions. As evidence of the successful execution of SOAR, the Company’s leading positions in the Texas Triangle, Colorado’s Front Range, northern and southern California and Arizona’s Sun Corridor megaregions and its growth platform in the southern portion of the Northeast megaregion are the results of acquisitions since 2011. The Company's enhanced positions in the Piedmont Atlantic megaregion and Florida megaregion were expanded with the Blue Water Industries LLC (BWI Southeast) acquisition completed during 2024. The Company has a legacy presence in the southeastern portion of the Great Lakes megaregion, encompassing operations in Indiana and Ohio, as well as the Gulf Coast megaregion in Texas.

The Company focuses its geographic footprint along significant transportation and commerce corridors, particularly in key Sunbelt metropolitan statistical areas (MSAs) across the Southeast and Southwest. The retail sector (both e-commerce as well as brick and mortar) values transportation corridors, as logistics and distribution are critical considerations for construction supporting that industry. In addition, technology companies view these areas as attractive locations for data centers.

The Company considers a state’s financial health rating, as issued by S&P Global Ratings, in determining the opportunities and attractiveness of areas for both expansion and/or development. The Company’s top ten revenue-generating states have been evaluated and scored a financial health rating of AA- or higher, where AAA is the highest score. The Company also reviews the state’s ability to secure additional infrastructure funding and financing.

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In line with the Company’s strategic objectives, management’s overall focus includes:

Safety Performance

The Company’s safety culture and performance sets the foundation for its long-term strategic plan and its financial and operational strength. For 2024, the Company achieved a record company-wide Lost-Time Incident Rate (LTIR) of 0.129, the eighth consecutive year of world-class or better LTIR thresholds, and a company-wide Total Injury Incident Rate (TIIR) of 0.650, the fourth consecutive year of world-class or better TIIR thresholds.

BUSINESS ENVIRONMENT

Building Materials Business

The Building Materials business serves customers in the construction marketplace. The business’ profitability is sensitive to national, regional and local economic conditions and cyclical swings in construction spending, which are affected by fluctuations in levels of public-sector infrastructure funding; interest rates; access to capital markets; and demographic, geographic, employment and population dynamics.

The heavy-side construction business, inclusive of much of the Company’s operations, is conducted outdoors. Therefore, erratic weather patterns, precipitation and other weather-related conditions, including flooding, hurricanes, extreme hot and cold temperatures, earthquakes, droughts and wildfires, can significantly affect production schedules, shipments, costs, efficiencies and profitability. Generally, the financial results for the first and fourth quarters are influenced by the impacts of winter weather, while the second and third quarters can be subject to the impacts of heavy precipitation and excessive heat. The impacts of erratic weather patterns are more fully discussed in the Building Materials Business’ Key Considerations section.

Product Lines

Aggregates are an engineered, granular material consisting of crushed stone, sand and gravel, manufactured to specific sizes, grades and chemistry for use primarily in construction applications. The Company’s operations consist mostly of open pit quarries; however, the Company is also the largest operator of underground aggregates mines in the United States, with 14 active underground mines located in the East Group. The Company’s aggregates reserves average more than 85 years at the 2024 annual production level.

Cement is the basic agent used to bind coarse aggregates, sand and water in the production of ready mixed concrete. Calcium carbonate in the form of limestone is the principal raw material used in the production of cement. The Company has a cement production facility in Midlothian, Texas, south of Dallas/Fort Worth, and operates two related distribution terminals. This production facility produces Portland limestone and specialty cements, with an annual clinker (an intermediary product of cement production) capacity at December 31, 2024 of approximately 2.4 million tons. The facility operated at approximately 72% utilization for clinker production in 2024. The Company completed a finishing capacity expansion project at the Midlothian plant in August 2024, which will provide 0.45 million tons of incremental annual cement production capacity. Further, the Company has converted its Midlothian plant to manufacture a less carbon-intensive Portland limestone cement, known as Type 1L, which has been approved by the Texas Department of Transportation and allows the production of more cement with less clinker.

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Ready mixed concrete is measured in cubic yards and specifically batched or produced for customers’ construction projects and then typically transported by mixer trucks and poured at the project site of a customer of the Company. The coarse aggregates used for ready mixed concrete are a washed material with limited amounts of fines ( i.e. , dirt and clay). The Company operates ready mixed concrete plants in Arizona and Texas.

Asphalt is typically used in surfacing roads and parking lots and consists of liquid asphalt, or bitumen (the binding medium), and aggregates. Similar to ready mixed concrete, each asphalt batch is produced to customer specifications. The Company’s asphalt operations are in Arizona, California, Colorado and Minnesota and related paving services are offered in California and Colorado.

Market dynamics for the downstream ready mixed concrete and asphalt product lines include a highly competitive environment and lower barriers to entry compared with the Company’s upstream product lines of aggregates and cement.

End-Use Trends

The principal end-use markets of the Building Materials business are public infrastructure ( i.e. , highways; streets; roads; bridges; and schools); nonresidential construction ( i.e. , manufacturing and distribution facilities; data centers; industrial complexes; office buildings; large retailers and wholesalers; healthcare; hospitality; and energy-related activity); and residential construction ( i.e. , subdivision development; and single- and multi-family housing). Aggregates are also used in agricultural, utility and environmental applications and as railroad ballast, collectively comprising the ChemRock/Rail market.

Public infrastructure projects can require several years to complete, while residential and nonresidential construction projects are usually completed within one year. Generally, customer purchase orders do not contain firm quantity commitments, regardless of end-use market.

Infrastructure

The public infrastructure market accounted for 37% of the Company’s aggregates shipments in 2024. The Company’s shipments to this end-use market are in line with the most recent five-year average of 36% and the most recent ten-year average of 37%.

Public construction projects, once awarded, are typically seen through to completion. Thus, delays from weather or other factors can serve to extend the duration of the construction cycle. While construction spending in the public and private market sectors is affected by economic cycles, public infrastructure spending has been comparatively more stable due to the predictability of funding from federal, state and local governments. The Infrastructure Investments and Jobs Act (IIJ Act) was signed into law on November 15, 2021 and contains a five-year surface transportation reauthorization plus $110 billion in new funding for roads, bridges and other hard infrastructure projects.

State and local initiatives that support infrastructure funding, including gas tax increases, new funding mechanisms and other ballot initiatives, are increasing in size and number as these governments recognize the need for their expanded role in public infrastructure investment. In November 2024, 77% of all infrastructure funding measures up for vote were approved. These approved infrastructure initiatives are estimated to generate $41 billion in one-time and recurring revenues, with initiatives in Texas, the Company’s largest revenue-generating state, accounting for $5 billion of this total.

Nonresidential

The nonresidential construction market accounted for 35% of the Company’s aggregates shipments in 2024. Large industrial projects of scale led by energy and domestic manufacturing continue to lead the segment, accounting for the majority of total nonresidential shipments. The Company expects enhanced federal investments will further support and accelerate growth trends in this end use, with a renewed focus on data centers for artificial intelligence infrastructure. While light nonresidential demand remained resilient through 2024, despite higher interest rates, high office vacancy rates and tighter commercial lending conditions, the Company expects 2025 demand in this segment to moderate, as it generally follows single-family residential development with a lag.

Residential

The residential construction market accounted for 23% of the Company’s aggregates shipments in 2024. This end use typically moves in direct correlation with economic cycles. The Company’s exposure to residential construction is split between aggregates used in the construction of subdivisions (including streets, sidewalks, utilities and storm and sewage drainage), single-family homes and multi-family units. Construction of both subdivisions and single-family homes is nearly three times

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more aggregates intensive than construction of multi-family units. Therefore, the level of new subdivision starts, as well as new single-family housing permits, is a strong leading indicator of residential volumes. According to the United States Census Bureau, for the year ended December 31, 2024, seasonally-adjusted national single-family housing starts decreased 3% to approximately 1.1 million units compared with 2023 and seasonally-adjusted national single-family housing permits decreased 3% versus 2023. Housing demand far exceeds supply in the Company’s key markets; however, a housing recovery is not expected until mortgage rates decline and/or affordability headwinds recede.

ChemRock/Rail

The remaining 5% of the Company’s 2024 aggregates shipments was to the ChemRock/Rail market, which includes ballast and agricultural limestone. Ballast is an aggregates product used to stabilize railroad track beds. Agricultural lime, a high-calcium carbonate material, is used as a supplement in animal feed, a soil acidity neutralizer and agricultural growth enhancer. Additionally, ChemRock/Rail includes rip rap (used as a stabilizing material to control erosion caused by water runoff at embankments, ocean beaches, inlets, rivers and streams) and high-calcium limestone (used as filler in glass, plastic, paint, rubber, adhesives, grease and paper). Chemical-grade, high-calcium limestone is used as a desulfurization material in utility plants.

Pricing Trends

Materials pricing for construction projects is generally based on terms committing to the availability of specified products of a stated quantity at an agreed-upon price during a definitive period. Because infrastructure projects often span multiple years, announced price changes can have a lag time before taking effect while the Company sells products under existing price agreements. Pricing escalators included in multi-year infrastructure contracts serve to somewhat mitigate this effect. However, during periods of heightened or rapid increases in production costs, multi-year infrastructure contract pricing may provide only nominal pricing growth. Additionally, the Company may implement multiple price increases throughout the year, on a market-by-market basis, where appropriate. Pricing is determined locally and is affected by supply and demand characteristics of the local market. For further information on pricing, see the discussion in the Financial Overview section.

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Cost Structure

Costs of revenues for the Building Materials business are components of costs incurred at the quarries, mines, cement plants, ready mixed concrete plants, asphalt plants, paving operations and distribution yards and facilities. Cost of revenues also includes the cost of resale materials, freight expenses to transport materials from a producing quarry or cement plant to a distribution yard or facility (internal freight), third-party freight and delivery costs incurred by the Company and then billed to customers (external freight) and production overhead costs.

Generally, the significant components of cost of revenues for the aggregates product line are (1) labor and benefits; (2) depreciation, depletion and amortization; (3) repairs and maintenance; (4) internal freight; (5) external freight; (6) supplies; (7) energy; and (8) contract services. In 2024, these categories represented 89% of the aggregates product line's total cost of revenues.

Variable costs are expenses that fluctuate with the level of production volume, while fixed costs are expenses that do not vary based on production or sales volume. Production is the key driver in determining the levels of variable costs, as it affects the number of hourly employees and related labor hours. Further, components of energy, supplies and repairs and maintenance costs also increase in connection with higher production volumes. Accordingly, the Company’s operating leverage can be meaningful.

Generally, when the Company invests capital in facilities and equipment, increased capacity and productivity reduce labor and repair costs serving to offset increased fixed depreciation costs. However, the increased productivity and related efficiencies may not be fully realized in a lower-demand environment, resulting in under-absorption of fixed costs.

Wage and benefit inflation as well as other increases in labor costs may be somewhat mitigated by enhanced productivity in an expanding economy. During economic downturns, the Company reviews its operations and, where practical, temporarily idles certain sites. The Company then serves these markets with other open and proximate facilities. In certain markets, management can create production “super crews” that work on a rotating basis at various locations. For example, within a market, a crew may work three days per week at one quarry and the other two workdays at another quarry. This has allowed the Company to responsibly manage headcount in periods of lower product demand.

Typically, diesel fuel represents the single-largest component of energy costs for the Building Materials business. The average cost per gallon was $2.82 and $3.25 in 2024 and 2023, respectively. Changes in energy costs also affect the prices that the Company pays for related supplies, including explosives, conveyor belting and tires. Further, the Company’s contracts for shipping products on its rail and waterborne distribution network typically include provisions for escalations or reductions in the amounts paid by the Company if the price of fuel moves outside a stated range.

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Cement production is a capital-intensive operation with high fixed costs requiring plants to operate continuously, except during maintenance shutdowns. Maintenance of kiln and finishing mills typically necessitates a temporary plant shut-down for repairs. The Company adjusts production levels in anticipation of these planned maintenance periods.

The production of ready mixed concrete and asphalt requires the use of cement and liquid asphalt raw materials, respectively. Therefore, fluctuations in availability and prices for these raw materials directly affect the Company’s operating results.

Building Materials Business’ Key Considerations

Growth markets with limited supply of indigenous stone must be served via a long-haul distribution network

The U.S. Department of the Interior identified possible sources of indigenous rock and documented its limited supply in certain areas of the United States, including the coastal areas from Virginia to Texas. Further, certain interior United States markets may experience limited availability of locally sourced aggregates resulting from increasingly restrictive zoning, permitting and/or environmental laws and regulations. The Company’s long-haul distribution network is used to supplement or, in many cases, wholly supply, the local crushed stone needs of these areas and provides the Company with the flexibility to effectively serve customers primarily in the Southwest and Southeast coastal markets.

The long-haul distribution network can also diversify market risk for locations that engage in long-haul transportation of aggregates products. This is particularly true where a producing quarry both serves a local market and transports products via rail, water and/or truck to be sold in other markets. The risk of a downturn in one market may be somewhat mitigated by other distant markets served by the location.

Product shipments are moved by truck, rail and water through the Company’s long-haul distribution network. The Company’s rail network primarily serves its Texas, Southeast and Gulf Coast markets, while the Company’s Bahamas and Nova Scotia locations transport materials via oceangoing ships. The Company’s strategic focus includes expanding inland and offshore capacity and acquiring distribution yards and port locations to offload transported material. As of December 31, 2024, the Company's distribution network consisted of 78 aggregates yards and 2 cement terminals.

The Company’s rail shipments result in continued reliance on railroad operations, which are impacted by track congestion, crew and locomotive availability, the effects of adverse weather conditions and the ability to negotiate favorable railroad shipping contracts. Further, changes in the operating strategy of rail transportation providers can create operational inefficiencies and increased costs from the Company’s rail network.

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A portion of railcars and all ships in the Company’s long-haul distribution network are under short- and long-term leases, some with purchase options, and contracts of affreightment. The limited availability of water and rail transportation providers, coupled with limited distribution sites, can adversely affect lease rates for such services and ultimately the freight rates.

The Company has agreements providing dedicated shipping capacity from its Bahamas and Nova Scotia operations to its coastal ports that expire in 2026 and 2027, respectively. These contracts of affreightment are take-or-pay contracts with minimum and maximum shipping requirements. The minimum requirements were met in 2024. There can be no assurance that such contracts will be renewed upon expiration or that terms will continue without significant increases.

Public infrastructure, historically the Company’s largest end-use market, is funded through a combination of federal, state and local sources

Transportation investments generally boost the economy by creating jobs and enhancing mobility and access, which are priorities of many of the government’s economic plans. Public-sector construction related to transportation infrastructure is funded through a combination of federal, state and local sources. The federal highway bill, currently the IIJ Act, provides annual funding for public-sector highway construction projects and includes spending authorizations, which represent the maximum financial obligation that will result from the immediate or future outlays of federal funds for highway and transit programs. The federal government’s surface transportation programs are funded mostly through the receipts of highway user taxes placed in the Highway Trust Fund, which is divided into the Highway Account and the Mass Transit Account. Revenues credited to the Highway Trust Fund are primarily derived from a federal gas tax, a federal tax on certain other motor fuels and interest on the accounts’ accumulated balances. Of the currently imposed federal gas tax of $0.184 per gallon, which has been static since 1993, $0.15 is allocated to the Highway Account of the Highway Trust Fund.

Since most states are required to balance their budgets, reductions in revenues generally require a reduction in states’ expenditures. However, the impact of state revenue reductions on highway investment will vary depending on whether the monies come from dedicated revenue sources, such as highway user fees, or whether portions are paid for with general funds.

In addition to federal appropriations, each state typically funds its infrastructure investment from specifically allocated amounts collected from various user fees, typically gasoline taxes and vehicle fees. States have assumed a significantly larger role in funding infrastructure investment, including initiating special-purpose taxes and raising state gas taxes. Management believes that financing at the state and local levels, such as bond issuances, toll roads, vehicle miles traveled fees and tax initiatives, will continue to grow and have a fundamental role in advancing infrastructure projects. State infrastructure investment generally leads to increased growth opportunities for the Company. The level of state public-works spending is varied across the nation and dependent upon individual state economies; the degree to which the Company could be affected by a reduction or slowdown in infrastructure spending varies by state. The state economies of the Building Materials business’ ten largest revenue-generating states may disproportionately affect the Company’s financial performance.

Governmental appropriations and expenditures are typically less interest rate-sensitive than private-sector spending. Obligations of federal funds are a leading indicator of highway construction activity in the United States. Before a state or local department of transportation can solicit bids on an eligible construction project, it enters into an agreement with the Federal Highway Administration to obligate the federal government to pay its portion of the project cost. These Federal obligations are subject to annual funding appropriation reviews by Congress.

In addition to highways and bridges, transportation infrastructure includes aviation, mass transit, ports and waterways. Railroad construction continues to benefit from economic growth, which ultimately generates a need for additional maintenance and improvements.

Erratic weather can significantly impact operations

Production and shipment levels for the Building Materials business correlate with general construction activity, most of which occurs outdoors and, as a result, is affected by erratic weather, seasonal changes and other environmental conditions. Typically, due to a general slowdown in heavy construction activity during winter months, the first and fourth quarters experience lower production and shipment activity. As such, temperatures in the months of March and November can meaningfully affect the Company’s first- and fourth-quarter results, respectively, where warm and/or moderate temperatures in March and November allow the construction season to start earlier and end later, respectively. Additionally, extreme heat during summer months can impact construction activities, as outdoor work may be limited to protect the health and safety of construction workers.

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Excessive rainfall jeopardizes production efficiencies, shipments and profitability in all markets served by the Company. In particular, the Company’s operations near the Atlantic Ocean and Gulf Coast regions of the United States and The Bahamas are at risk for hurricane activity from June through November, but most notably in August, September and October. The Company’s California operations are at risk for flooding, wildfire activity and water use restrictions in severe drought conditions.

Capital investment decisions are driven by capital intensity of the Building Materials business and focus on land

The Company’s organic capital program is designed to leverage construction market growth through investment in both permanent and portable facilities at the Company’s operations. Over an economic cycle, the Company typically invests organic capital at an annual level that approximates depreciation expense. At mid-cycle and through cyclical peaks, organic capital investment usually exceeds depreciation expense, as the Company supports current capacity needs and future growth. Conversely, at a cyclical trough, the Company may reduce levels of capital investment. Regardless of cycle, the Company sets a priority of investing capital to ensure safe, environmentally sound and efficient operations, as well as to provide the highest quality of customer service and establish a foundation for future growth.

The Company is diligent in its focus on land opportunities, including potential new sites (greensites) and existing site expansion. Land purchases are usually opportunistic and can include contiguous property around existing quarry locations. Such property can serve as buffer property or additional mineral reserves, assuming regulatory hurdles can be cleared and the underlying geology supports economical aggregates mining. In either instance, the acquisition of additional property around an existing quarry typically allows the expansion of the quarry footprint and an extension of quarry life.

Magnesia Specialties Business

The Magnesia Specialties business manufactures magnesia-based chemicals products for industrial, agricultural and environmental applications at its Manistee, Michigan facility. The chemical products business focuses on higher-margin specialty chemicals that can be produced at volumes that support efficient operations. The Magnesia Specialties business also produces and sells dolomitic lime from its Woodville, Ohio facility. Dolomitic lime products sold to external customers are primarily used by the domestic steel industry, while the remaining lime shipments are used internally as a raw material for the manufacturing of chemical products.

With 44% of Magnesia Specialties’ 2024 revenues related to products used in the steel industry, a portion of the segment’s revenues and profits is affected by production and inventory trends within the steel industry, which are guided by the rate of consumer consumption, the flow of offshore imports and other economic factors. The dolomitic lime business runs most profitably at 70% or greater steel capacity utilization. Domestic steel production averaged 70% of capacity in 2024 and 74% in 2023.

While revenues of the Magnesia Specialties business were predominantly derived from domestic customers in 2024, financial results can be affected by foreign currency exchange rates, increasing transportation costs or weak economic conditions in

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foreign markets. To mitigate the short-term effect of currency exchange rates, foreign transactions are denominated in United States dollars.

A significant portion of the Magnesia Specialties business’ costs is of a fixed or semi-fixed nature. The production process requires the use of natural gas, coal and petroleum coke; therefore, fluctuations in their pricing directly affect operating results. To help mitigate this risk, the Company has fixed-price agreements for 43% of its anticipated 2025 energy needs for coal, petroleum coke and natural gas. Given inherently high fixed costs, low capacity utilization can negatively affect the segment’s results of operations. Management expects future organic profit growth to result from increased pricing, commercialization of new products, entry into new markets and optimization of overall product mix.

In 2024, direct production costs represented 81% of the Magnesia Specialties business' total cost of revenues:

The Magnesia Specialties business is highly dependent on rail transportation, particularly for movement of dolomitic lime from Woodville to Manistee and direct customer shipments of dolomitic lime and magnesia chemicals products from both Woodville and Manistee. The segment can be affected by the risks mentioned in the long-haul distribution discussion in the Building Materials Business’ Key Considerations section.

Environmental Regulation and Litigation

The expansion and growth of the aggregates industry is subject to increasing challenges from environmental and political advocates aiming to control the pace and direction of future development. Certain environmental groups have published lists of targeted municipal areas, including areas within the Company’s marketplace, for environmental and suburban growth control. The effect of these initiatives on the Company’s growth is typically localized. Further challenges are expected as the momentum of these initiatives ebb and flow. Rail and other transportation alternatives are being heralded by these special-interest groups as solutions to mitigate road traffic congestion and overcrowding.

The Company’s operations are subject to and affected by federal, state and local laws, rules and regulations relating to the environment, health and safety and other regulatory matters. Certain of the Company’s operations may occasionally use substances classified as toxic or hazardous. The Company regularly monitors and reviews its operations, procedures and policies for compliance with these laws and regulations. Despite these compliance efforts, risk of environmental liability is inherent in the operation of the Company’s businesses, as it is with other entities engaged in similar businesses.

Environmental operating permits are, or may be, required for certain of the Company’s operations; such permits are subject to modification, renewal and revocation. New permits are generally required for opening new sites or for expansion at existing operations and can take several years to obtain. Moreover, land use, rezoning and special or conditional use permits are increasingly difficult to obtain. Once a permit is issued, the location is required to generally operate in accordance with the approved site plan.

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The Clean Air Act, originally passed in 1963 and periodically updated by amendments, is the United States’ national air pollution control program that granted the United States Environmental Protection Agency (USEPA) authority to set limits on the level of various air pollutants. To meet National Ambient Air Quality Standards, a defined geographic area must be below established limits for six pollutants. Environmental groups have been successful in proceedings against the federal and certain state departments of transportation, delaying highway construction in municipal areas not in compliance with the Clean Air Act. The USEPA designates geographic areas as nonattainment areas when the level of air pollutants exceeds the national standard. Nonattainment areas receive deadlines to reduce air pollutants by instituting various control strategies or otherwise face fines or control by the USEPA. Included as nonattainment areas are several major metropolitan areas in the Company’s markets, such as Houston/Brazoria/Galveston, Texas; Dallas/Fort Worth, Texas; Bexar County in San Antonio/New Braunfels, Texas; Denver, Colorado; Boulder, Colorado; Fort Collins/Greeley/Loveland, Colorado; Baltimore, Maryland; Los Angeles-San Bernardino Counties, California; Los Angeles – South Coast Basin, California; Phoenix/Mesa, Arizona; San Diego County, California; San Francisco Bay Area, California; San Joaquin Valley, California; and Sacramento County, California. Federal transportation funding has been directly tied to compliance with the Clean Air Act.

Large emitters (facilities that emit 25,000 metric tons or more per year) of greenhouse gases (GHG) must report GHG generation to comply with the USEPA’s Mandatory Greenhouse Gases Reporting Rule (GHG Rule). In 2024, the Company filed annual reports in accordance with the GHG Rule relating to operations at its cement plant in Texas, as well as its Magnesia Specialties facilities in Woodville, Ohio, and Manistee, Michigan, each of which emit certain GHG, including carbon dioxide, methane and nitrous oxide. If Congress passes additional legislation limiting GHG emissions, these operations will likely be subject to such legislation. The Company believes that any increased operating costs or taxes related to GHG emission limitations at its cement or Woodville operations would be passed on to its customers. The Manistee facility may have to absorb extra costs due to the regulation of GHG emissions to maintain competitive pricing in its markets. The Company cannot reasonably predict the amount of those potential increased costs.

The Company is engaged in certain legal and administrative proceedings incidental to its normal business activities. In management's and counsel's opinion, based upon currently available facts, the likelihood is remote that the ultimate outcome of any litigation or other proceedings, including those pertaining to environmental matters, relating to the Company and its subsidiaries, will have a material adverse effect on the overall results of the Company’s operations, cash flows or financial position.

FINANCIAL OVERVIEW

Results of Operations

The following discussion and analysis reflect management’s assessment of the financial condition and results of operations (MD&A) of the Company for continuing operations and should be read in conjunction with the audited consolidated financial statements ( Item 8, Financial Statements and Supplementary Data ). As discussed in more detail, the Company’s operating results are highly dependent upon activity within the construction marketplace, economic cycles within the public and private business sectors, and seasonal and other weather-related conditions. Accordingly, financial results for any year presented, or year-to-year comparisons of reported results, may not be indicative of future operating results. As permitted by the Securities and Exchange Commission (SEC) under the FAST Act Modernization and Simplification of Regulation S-K, the Company has elected to omit the discussion of the earliest period (2022) presented because it was included in its MD&A in its 2023 Annual Report on Form 10-K filed on February 23, 2024, incorporated by reference from Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations thereto.

The Company’s Building Materials business generated the majority of consolidated revenues and earnings from continuing operations. The following comparative analysis and discussion should be read within this context. Further, sensitivity analysis and certain other data are provided to enhance the reader’s understanding of MD&A and are not intended to be indicative of management’s judgment of materiality.

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The Company’s consolidated operating results and operating results as a percentage of revenues are as follows:

years ended December 31 (in millions, except for % of revenues)		2024				% of Revenues				2023				% of Revenues
Revenues		$	6,536				100			$	6,777				100
Cost of revenues			4,658				71				4,754				70
Gross Profit			1,878				29				2,023				30
Selling, general and administrative expenses			447				7				443				7
Acquisition, divestiture and integration expenses			50								12
Other operating income, net			(1,326	)							(28	)
Earnings from Operations			2,707				41				1,596				24
Interest expense			169								165
Other nonoperating income, net			(58	)							(62	)
Earnings from continuing operations before income tax expense			2,596								1,493
Income tax expense			600								293
Earnings from continuing operations			1,996				31				1,200				18
Loss from discontinued operations, net of income tax benefit			—								(30	)
Consolidated net earnings			1,996								1,170
Less: Net earnings attributable to noncontrolling interests			1								1
Net Earnings Attributable to Martin Marietta		$	1,995				31			$	1,169				17

Consolidated Adjusted EBITDA

Earnings from continuing operations before interest; income taxes; depreciation, depletion and amortization; earnings/loss from nonconsolidated equity affiliates; acquisition, divestiture and integration expenses; the impact of selling acquired inventory after its markup to fair value as part of acquisition accounting (Inventory Markup); nonrecurring gain on divestiture; and noncash asset and portfolio rationalization charge, or Adjusted EBITDA, is an indicator used by the Company and investors to evaluate the Company’s operating performance from period to period. Effective January 1, 2024, the Company has elected to add back, for purposes of its Adjusted EBITDA calculation, acquisition, divestiture and integration expenses and the Inventory Markup only for transactions with consideration of $2.0 billion or more and expected acquisition, divestiture and integration expenses of at least $15 million. For 2024, this includes the acquisition of 20 active aggregates operations from affiliates of Blue Water Industries LLC (BWI Southeast) and the Divestiture. See Note B to the consolidated financial statements for additional information regarding the BWI Southeast acquisition and the Divestiture.

Adjusted EBITDA is not defined by U.S. generally accepted accounting principles (GAAP) and, as such, should not be construed as an alternative to net earnings attributable to Martin Marietta, earnings from operations or operating cash flow. Because Adjusted EBITDA excludes some, but not all, items that affect net earnings and may vary among businesses, Adjusted EBITDA as presented by the Company may not be comparable to similarly titled measures of other companies.

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The following table presents a reconciliation of net earnings from continuing operations attributable to Martin Marietta to consolidated Adjusted EBITDA:

years ended December 31
(in millions)		2024				2023
Net earnings from continuing operations attributable to Martin Marietta		$	1,995			$	1,199
Add back (deduct):
Interest expense, net of interest income			128				119
Income tax expense for controlling interests			600				293
Depreciation, depletion and amortization expense and earnings/loss from nonconsolidated equity affiliates			564				505
Acquisition, divestiture and integration expenses			40				12
Impact of selling acquired inventory after markup to fair value as part of acquisition accounting			20				—
Nonrecurring gain on divestiture			(1,331	)			—
Noncash asset and portfolio rationalization charge			50				—
Consolidated Adjusted EBITDA		$	2,066			$	2,128

Mix-Adjusted Average Selling Price

Mix-adjusted average selling price (mix-adjusted ASP) is a non-GAAP measure that excludes the impact of period-over-period product, geographic and other mix on the Company's average selling price. Mix-adjusted ASP is calculated by comparing current-period shipments to like-for-like shipments in the comparable prior period. Management uses this metric to evaluate the realization of pricing changes and believes this information is useful to investors because it provides same-on-same pricing trends.

The following reconciles reported average selling price per ton to organic mix-adjusted ASP and corresponding variances:

years ended December 31		2024				2023
Aggregates:
Reported average selling price		$	21.80			$	19.84
Adjustment for impact of acquisitions			0.22				—
Organic average selling price		$	22.02			$	19.84
Adjustment for impact of product, geographic and other mix			(0.07	)
Organic mix-adjusted ASP		$	21.95
Reported average selling price variance			9.9	%
Organic average selling price variance			11.0	%
Organic mix-adjusted ASP variance			10.7	%

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Revenues

The following table presents revenues for the Company and its reportable segments by product line for continuing operations:

years ended December 31
(in millions)		2024				2023
Building Materials business:
East Group:
Aggregates		$	2,787			$	2,593
Asphalt			184				199
Less: interproduct revenues			(30	)			(29	)
East Group Total			2,941				2,763
West Group:
Aggregates			1,727				1,709
Cement and ready mixed concrete			1,083				1,518
Asphalt and paving services			685				688
Less: interproduct revenues			(220	)			(216	)
West Group Total			3,275				3,699
Total Building Materials business			6,216				6,462
Magnesia Specialties			320				315
Total		$	6,536			$	6,777

Gross Profit

The following table presents gross profit and gross margin data for the Company by product line for continuing operations:

		2024							2023
years ended December 31 (dollars in millions)		Amount			% of Revenues				Amount			% of Revenues
Building Materials business:
Aggregates		$	1,449			32	%		$	1,378			32	%
Cement and ready mixed concrete			260			24	%			436			29	%
Asphalt and paving services			101			12	%			109			12	%
Total Building Materials business			1,810			29	%			1,923			30	%
Magnesia Specialties			107			33	%			97			31	%
Corporate			(39	)	NM					3		NM
Total		$	1,878			29	%		$	2,023			30	%

The decrease in Building Materials business gross profit in 2024 compared with 2023 was primarily attributable to the Divestiture and the $20 million Inventory Markup charge associated with the BWI Southeast acquisition, partially offset by pricing gains across all product lines and lower energy costs. Aggregates gross profit increased due to contributions from acquired operations and pricing growth, despite lower shipments and the Inventory Markup.

The increase in gross profit in Magnesia Specialties was driven by pricing gains in both the lime and chemical product lines, coupled with lower energy costs, which more than offset lower shipments.

Corporate gross profit includes intercompany royalty and rental revenues and expenses; depreciation and amortization for corporate owned assets; and unallocated operational expenses excluded from the Company’s evaluation of business segment performance.

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Building Materials. Shipment data and volume variances by product line for the Building Materials business are as follows:

years ended December 31 (in millions)		2024				2023				% Change
Aggregates tons			191.1				198.8				(3.8	%)
Cement tons			2.3				4.0				(43.5	%)
Ready mixed concrete cubic yards			5.0				6.5				(24.2	%)
Asphalt tons			8.8				9.4				(5.9	%)

Aggregates shipments decreased 3.8% in 2024, driven by the Company's value-over-volume pricing strategy, unfavorable weather and softer residential, warehouse and manufacturing demand, which were partially offset by shipments from acquired operations. Aggregates pricing increased 9.9%, or 10.7% on an organic mix-adjusted basis, compared with 2023, due to the cumulative effect of 2023 and 2024 pricing actions. During 2024, aggregates shipments to the infrastructure, nonresidential and residential end use markets decreased 2%, 4% and 5%, respectively.

Cement shipments and ready mixed concrete shipments decreased 43.5% and 24.2%, respectively, versus prior year, primarily due to the Divestiture and significant precipitation in Texas in 2024 relative to 2023.

In 2024, asphalt shipments decreased 5.9% from 2023, driven by unfavorable weather and softer market demand. Asphalt and paving gross profit decreased 7% in 2024 versus prior year, due to lower shipments and general inflationary impacts that more than offset pricing gains and lower asphalt cement raw material costs.

Magnesia Specialties. In 2024, Magnesia Specialties reported revenues of $320 million and gross profit of $107 million, representing increases of 2% and 10%, respectively, compared with 2023. The profitability increase in 2024 reflects pricing gains in both the lime and chemical product lines and lower energy costs, which more than offset the impact of lower shipments.

Selling, General and Administrative Expenses

SG&A expenses for 2024 and 2023 were 6.8% and 6.5% of revenues, respectively.

Other Operating Income, Net

Other operating income, net, represented income of $1.3 billion in 2024 and $28 million in 2023. The 2024 amount included a $1.3 billion pretax gain on the Divestiture and $28 million of gains on land sales, which were partially offset by a $50 million pretax, noncash asset and portfolio rationalization charge (Rationalization Charge; see Note R to the consolidated financial statements). In 2023, other operating income, net, included $20 million of gains on land sales.

Earnings from Operations

Consolidated earnings from operations were $2.7 billion and $1.6 billion in 2024 and 2023, respectively. The 2024 amount included a $1.3 billion pretax gain on the Divestiture.

Interest Expense

Interest expense was $169 million in 2024 and $165 million in 2023.

Other Nonoperating Income, Net

Consolidated other nonoperating income, net, was $58 million in 2024 and $62 million in 2023, inclusive of interest income of $40 million and $47 million, respectively.

Income Tax Expense

The Company’s estimated effective income tax rate for the years ended December 31, 2024 and 2023 was 23.1% and 19.6%, respectively. The higher 2024 effective income tax rate versus 2023 was driven by the impact of the Divestiture, which included the write-off of certain nondeductible goodwill. For further information, see Note I to the consolidated financial statements.

The Company does not anticipate that the tax law changes due to Pillar Two will have a material impact on its estimated effective income tax rate.

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Discontinued Operations

Through their respective divestiture dates, the financial results of the Company's California cement businesses and certain California ready mixed concrete operations, which were acquired in 2021, were reported as discontinued operations. The Company sold the Tehachapi, California cement plant on October 31, 2023 and the Stockton, California cement import terminal on May 3, 2023. The collective businesses generated a loss of $30 million in 2023, net of expenses associated with the divestitures and income tax benefit.

Net Earnings and Earnings Per Diluted Share From Continuing Operations Attributable to Martin Marietta

Net earnings from continuing operations attributable to Martin Marietta were $2.0 billion, or $32.41 per diluted share, for 2024 and $1.2 billion, or $19.32 per diluted share, for 2023. 2024 included an after-tax gain of $976 million, or $15.85 per diluted share, on the Divestiture, an after-tax loss of $37 million, or $0.61 per diluted share, for the Rationalization Charge, an after-tax charge of $15 million, or $0.24 per diluted share, for the Inventory Markup and after-tax acquisition, divestiture and integration expenses of $32 million, or $0.51 per diluted share, related to the BWI Southeast acquisition and the Divestiture.

Liquidity and Cash Flows

Operating Activities

Generally, the Company’s primary source of liquidity is cash generated from operating activities. Operating cash flow is substantially derived from consolidated net earnings, before deducting depreciation, depletion and amortization, after adjusting for noncash gains and losses, and offset by working capital requirements. Cash provided by operations was $1.5 billion in each of 2024 and 2023.

The Internal Revenue Service has provided certain disaster tax relief for North Carolina businesses affected by Hurricanes Debby and Helene, which allows the Company to defer estimated federal and certain state income, payroll and excise tax payments for the period from August 2024 through April 2025. The deferred obligation will be due May 1, 2025. For the year ended December 31, 2024, operating cash flow benefited from deferred income tax payments of $102 million under this provision.

Investing Activities

Net cash used for investing activities was $2.4 billion in 2024 and net cash provided by investing activities was $459 million in 2023.

Pretax proceeds from divestitures and sales of assets were $2.2 billion in 2024 and $427 million in 2023. The 2024 amount includes the Divestiture. On April 5, 2024, the Company used $2.05 billion of cash on hand to fund the BWI Southeast acquisition. Subsequently, the Company used available liquidity to fund the South Florida aggregates acquisition on October 25, 2024 and the West Texas aggregates acquisition on December 13, 2024.

Cash paid for property, plant and equipment additions was $855 million in 2024, which included a purchase of land, aggregates reserves and processing plants in Southern California, and $650 million in 2023.

In 2023, net cash provided by investing activities included $700 million in proceeds from the sale of restricted investments, which the Company had invested during 2022 and were used to repay discharged debt and related interest in 2023.

Financing Activities

Net cash provided by financing activities was $373 million in 2024 and net cash used for financing activities was $1.1 billion in 2023. In November 2024, the Company issued $1.5 billion of publicly traded debt and in July 2024, repaid the $400 million of 4.250% Senior Notes that matured by their own terms. Additionally, during 2024, the Company borrowed and repaid $1.3 billion on its short-term facilities. In 2023, the Company used $700 million to repay discharged debt and related interest.

For the years ended December 31, 2024 and 2023, the Board of Directors approved total cash dividends on the Company’s common stock of $3.06 per share and $2.80 per share, respectively. Total cash dividends paid were $189 million in 2024 and $174 million in 2023.

During 2024, the Company repurchased 0.8 million shares of its common stock for a total cost of $450 million. During 2023, the Company repurchased 0.4 million shares of its common stock for a total cost of $150 million. In 2024 and 2023, the average cost was $572.70 per share and $393.16 per share, respectively.

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Capital Structure and Resources

Long-term debt, including current maturities, was $5.4 billion at December 31, 2024, and was in the form of publicly-issued long-term notes and debentures. On November 4, 2024, the Company issued $750 million aggregate principal amount of 5.150% Senior Notes due 2034 and $750 million aggregate principal amount of 5.500% Senior Notes due 2054. The Company used the net proceeds to repay the borrowings outstanding under its revolving credit facility and trade securitization facility. The remaining net proceeds were used for general corporate purposes and acquisitions.

The Company, through a wholly-owned special-purpose subsidiary, has a $400 million trade receivable securitization facility (the Trade Receivable Facility) that matures on September 17, 2025. The Trade Receivable Facility contains a cross-default provision to the Company’s other debt agreements. There were no outstanding borrowings on the Trade Receivable Facility as of December 31, 2024.

The Company has an $800 million five-year senior unsecured revolving facility (the Revolving Facility), which matures in December 2029. There were no outstanding borrowings on the Revolving Facility as of December 31, 2024. The Revolving Facility requires the Company’s ratio of consolidated net debt-to-consolidated EBITDA, as defined, for the trailing-twelve months (the Ratio) to not exceed 3.50x as of the end of any fiscal quarter, provided that the Company may exclude from the Ratio debt incurred in connection with certain acquisitions during the quarter (or the three preceding quarters) so long as the Ratio calculated without such exclusion does not exceed 4.00x. Additionally, if there are no amounts outstanding under the Revolving Facility and the Trade Receivable Facility, consolidated debt, including debt for which the Company is a guarantor, shall be reduced in an amount equal to the lesser of $500 million or the sum of the Company’s unrestricted cash and temporary investments, for purposes of the covenant calculation. The Company was in compliance with the Ratio and other requirements under the Revolving Facility at December 31, 2024.

Pursuant to authority granted by its Board of Directors, the Company can repurchase up to 20 million shares of common stock. As of December 31, 2024, the Company had 11.9 million shares remaining under the repurchase authorization. Future share repurchases are at management's discretion.

At December 31, 2024, the Company had $670 million in unrestricted cash and short-term investments that are considered cash equivalents. The Company manages its cash and cash equivalents to ensure short-term operating cash needs are met and excess funds are managed efficiently. The Company’s investments in bank funds generally exceed the FDIC insurance limit.

Cash on hand, along with the Company’s projected internal cash flows and availability of financing resources, including its access to debt and equity capital markets, is expected to continue to be sufficient to provide the capital resources necessary to support anticipated operating needs, cover debt service requirements, meet capital expenditures and discretionary investment needs, fund certain acquisition opportunities that may arise and allow for payment of dividends for the foreseeable future. Borrowings under the Revolving Facility are unsecured and may be used for general corporate purposes. The Company’s ability to borrow or issue securities is dependent upon, among other things, prevailing economic, financial and market conditions. At December 31, 2024, the Company had $1.2 billion of unused borrowing capacity under its Revolving Facility and Trade Receivable Facility.

The Company is exposed to credit markets through the interest cost related to borrowings under its Revolving Facility and Trade Receivable Facility.

Contractual and Off-Balance Sheet Obligations

The Company has retirement benefits related to pension plans. At December 31, 2024, the fair value of the qualified pension plans’ assets exceeded the projected benefit obligation by $371 million. The Company estimates making contributions of $25 million to qualified pension plans in 2025. Any contributions beyond 2025 are currently undeterminable and will depend on the investment return on the related pension assets. At December 31, 2024, the Company had a total obligation of $100 million related to unfunded nonqualified pension plans and expects to make contributions of $15 million to these plans in 2025.

In connection with normal, ongoing operations, the Company enters into market-rate leases for property, plant and equipment and royalty commitments principally associated with leased land and mineral reserves. Additionally, the Company enters into equipment rentals to meet shorter-term, nonrecurring and intermittent needs. At December 31, 2024, the Company had $391 million in operating lease obligations and $221 million in finance lease obligations, representing the present value of future payments. The imputed interest on operating and finance lease obligations was $189 million. Management anticipates that, in the ordinary course of business, the Company will enter into additional royalty agreements for land and mineral reserves during

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2025. As permitted, short-term leases are excluded from Accounting Standards Codification 842, Leases (ASC 842) requirements and future noncancelable obligations for these leases as of December 31, 2024 are immaterial.

As of December 31, 2024, future interest payable on the Company’s publicly-traded debt through the various maturity dates was $3.4 billion. The Company had obligations related to a contract of affreightment not accounted for as a lease, and royalty agreements, totaling $52 million and $165 million, respectively, as of December 31, 2024. The Company had purchase commitments for property, plant and equipment of $162 million as of December 31, 2024 and other purchase obligations related to energy and service contracts totaling $158 million as of December 31, 2024.

The Company invests in renewable energy investment entities which qualify for tax credits and other tax benefits. As of December 31, 2024, the Company has committed to an additional $44 million of tax equity investments related to renewable energy tax credit projects. These amounts are expected to be paid in 2025 and are recorded in the Other current liabilities line item on the consolidated balance sheet.

Contingent Liabilities and Commitments

The Company has entered into standby letter of credit agreements relating to certain insurance claims, contract performance and permit requirements. At December 31, 2024, the Company had contingent liabilities guaranteeing its own performance under these outstanding letters of credit of $37 million.

In the normal course of business, at December 31, 2024, the Company was contingently liable for $818 million in surety bonds, which guarantee its own performance and are required by certain states and municipalities and their related agencies. The Company has indemnified the underwriting insurance companies against any exposure under the surety bonds. In the Company’s experience, no material claims have been made against these financial instruments.

Other Financial Information

Critical Accounting Policies and Estimates

The Company uses certain significant accounting policies to prepare its audited consolidated financial statements and related disclosures in conformity with U.S. generally accepted accounting principles. These accounting policies are described in Note A: Accounting Policies of the Notes to Financial Statements of the Company’s consolidated financial statements included under Item 8, Financial Statements and Supplemental Data of this Form 10-K.

The Company’s audited consolidated financial statements include certain critical estimates regarding the effect of matters that are inherently uncertain. Management bases its estimates on historical experience and on various other assumptions it believes to be reasonable under the circumstances, the results of which form the basis for making subjective and complex judgments about the carrying values of assets and liabilities. Amounts reported in the Company’s consolidated financial statements could differ materially if management used different assumptions in making these estimates, resulting in actual results differing from those estimates. Methodologies used and assumptions selected by management in making these estimates, as well as the related disclosures, have been reviewed by and discussed with the Company’s Audit Committee. Management’s determination of the critical nature of accounting estimates and judgments may change from time to time depending on facts and circumstances that management cannot currently predict.

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Business Combinations – Allocation of Purchase Price

The Company’s Board of Directors and management regularly review long-term strategic plans, including potential investments in value-added acquisitions of related or similar businesses, which would increase the Company’s market presence and/or are related to the Company’s existing markets. When an acquisition is completed, the Company’s consolidated statements of earnings include the operating results of the acquired business starting from the date of acquisition, which is the date control is obtained. The purchase price is determined based on the fair value of assets and equity interests given to the seller and any future obligations to the seller as of the date of acquisition. The Company allocates the purchase price to the fair values of the tangible and intangible assets acquired and liabilities assumed as valued at the date of acquisition. Goodwill is recorded for the excess of the purchase price over the net of the fair value of the identifiable assets acquired and liabilities assumed as of the acquisition date. The purchase price allocation is a critical accounting policy because the estimation of fair values of acquired assets and assumed liabilities is judgmental and requires various assumptions. Further, the amounts and useful lives assigned to depreciable and amortizable assets versus amounts assigned to goodwill and indefinite-lived intangible assets, which are not amortized, can significantly affect the results of operations in the period of and for periods following a business combination.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction, and, therefore, represents an exit price. Fair value measurement assumes the highest and best use of the asset by market participants, considering the use of the asset that is physically possible, legally permissible, and financially feasible at the measurement date. The Company assigns the highest level of fair value available to assets acquired and liabilities assumed based on the following options:

Level 1 fair values are used to value investments in publicly traded entities and assumed obligations for publicly traded long-term debt.

Level 2 fair values are typically used to value acquired receivables, inventories, machinery and equipment, land, buildings, deferred income tax assets and liabilities, and accruals for payables, asset retirement obligations, environmental remediation and compliance obligations, and contingencies. Additionally, Level 2 fair values are typically used to value assumed contracts at other-than-market rates.

Level 3 fair values are used to value acquired mineral reserves and mineral interests produced and sold as final products, and separately-identifiable intangible assets. The fair values of mineral reserves and mineral interests are determined using an excess earnings approach, which requires significant judgment to estimate future cash flows, net of capital investments in the specific operation and contributory asset charges. The estimate of future cash flows is based on available historical information and future expectations and assumptions determined by management, but is inherently uncertain. Significant assumptions used to estimate future cash flows include changes in forecasted revenues based on sales price and shipment volumes, EBITDA margin and forecasted expenses inclusive of production costs and capital needs. The present value of the projected net cash flows represents the fair value assigned to mineral reserves and mineral interests. The discount rate is a significant assumption used in the valuation model and is based on the required rate of return that a hypothetical market participant would require if purchasing the acquired business, with an adjustment for the risk of these assets not generating the projected cash flows.

The Company values separately-identifiable acquired intangible assets which may include, but are not limited to, permits, customer relationships, water rights and noncompetition agreements. The fair values of these assets are typically determined by an excess earnings method, a replacement cost method or, in the case of water rights, a market approach.

The useful lives of amortizable intangible assets and the remaining useful lives for acquired machinery and equipment have a significant impact on earnings. The selected lives are based on the expected periods that the assets will provide value to the Company following the business combination.

The Company may adjust the amounts recognized for a business combination during a measurement period after the acquisition date. Any such adjustments are based on the Company obtaining additional information that existed at the acquisition date regarding the assets acquired or the liabilities assumed. Measurement-period adjustments are generally recorded as increases or decreases to the goodwill recognized in the transaction. The measurement period ends once the Company has obtained all necessary information that existed as of the acquisition date, but does not extend beyond one year

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from the date of acquisition. Any adjustments to assets acquired or liabilities assumed beyond the measurement period are recorded through earnings.

For additional information about business combinations and purchase price allocations, see Note B to the consolidated financial statements.

Impairment Review of Goodwill

Goodwill is required to be tested annually for impairment by comparing a reporting unit’s fair value to its carrying value. An interim review is performed between annual tests if facts and circumstances indicate a potential impairment. The impairment review of goodwill is a critical accounting estimate because goodwill (excluding any goodwill allocated to assets held for sale) represented 21% of the Company’s total assets at December 31, 2024; the review requires management to apply judgment and make key assumptions; and an impairment charge could be material to the Company’s financial condition and results of operations.

As part of any qualitative assessment, or Step-0 analysis, the Company evaluates macroeconomic conditions, industry and market conditions, cost factors, overall financial performance and other business or reporting unit-specific events that could impact the fair values of its reporting units.

For reporting units evaluated using a qualitative assessment, or Step-1 analysis, the Company calculates its reporting units' fair values using both an income and market approach. The income approach determines fair values based on discounted cash flow models whereas the market approach involves the application of revenues and EBITDA multiples of comparable companies. Significant assumptions used in the Company's discounted cash flow model include management’s estimates of changes in average selling price, shipment volumes and production costs as well as assumptions of future profitability, capital requirements, discount rates and a terminal growth rate. Price, cost and volume assumptions are based on various factors, including historical averages and current forecasts, external sources, and market conditions, while also considering any production capacity constraints. Future profitability and capital requirements are, by their nature, estimates. Capital requirements include maintenance-level needs and known efficiency- and capacity-increasing investments. The calculation of a reporting unit's discount rate includes the following components, which are primarily based on published sources: equity risk premium, historical beta, risk-free interest rate, size premium and borrowing rate. To assess the reasonableness of the reporting units' fair values, the Company's compares the total of the reporting unit fair values to its market capitalization.

Changes in these estimates and assumptions could materially affect the determination of fair value and goodwill impairment. Further, mineral reserves, which represent underlying assets producing the reporting units’ cash flows for the aggregates product line, are depleting assets by their nature. Any potential impairment charges from future evaluations represent a risk to the Company.

For the 2024 annual impairment evaluation, the Company performed a Step-0 analysis for all reporting units as of October 1, 2024 and concluded that it is more-likely-than-not that each of the reporting units’ fair value exceeded its carrying value.

For additional information about goodwill, see Note C to the consolidated financial statements.

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Pension Benefit Obligation and Pension Expense – Selection of Assumptions

The Company sponsors noncontributory defined benefit pension plans that cover substantially all employees and a Supplemental Excess Retirement Plan (SERP) for certain retirees. Annually, as of December 31, management remeasures the defined benefit pension plans’ projected benefit obligation based on the present value of the projected future benefit payments to all participants for services rendered to date, reflecting expected future pay increases through the participants’ expected retirement dates.

Annual pension expense (inclusive of SERP expense), referred to as net periodic benefit cost within the consolidated financial statements, consists of several components, which are calculated annually:

Management believes the selection of assumptions related to the annual pension expense and related projected benefit obligation is a critical accounting estimate due to the high degree of volatility in the expense and obligation dependent on selected assumptions. The key assumptions include the discount rate, rate of increase in future compensation levels, expected long-term rate of return on pension plan assets and mortality table and mortality improvement scale.

Management’s selection of the discount rate is based on an analysis that estimates the current rate of return for high-quality, fixed-income investments with maturities matching the payment of pension benefits that could be purchased to settle the obligations. The Company selected a hypothetical portfolio of Moody’s Aa bonds, with maturities that match the benefit obligations, to determine the discount rate. At December 31, 2024, the Company selected a discount rate assumption of 6.00%, a 42-basis-point increase compared with the December 31, 2023 assumption. Of the four key assumptions, the discount rate is generally the most volatile and sensitive estimate. Accordingly, a change in this assumption can have a significant impact on the annual pension expense and the projected benefit obligation.

Management’s selection of the rate of increase in future compensation levels, which reflects cost of living adjustments and merit and promotion increases, is generally based on the Company’s historical increases in pensionable earnings, while giving consideration to any future expectations. A higher rate of increase results in higher pension expense and a higher projected benefit obligation. The assumed long-term rate of increase is 4.50%.

Management’s selection of the expected long-term rate of return on pension fund assets is based on the current asset class mix of the Company's pension plan assets, current capital market conditions and a stochastic forecast of future conditions. Based on the currently projected returns on these assets and related expenses, the Company selected an expected return on assets of 6.75%, the same as the prior-year rate.

The difference between the expected return and the actual return on pension assets is included in actuarial gains and losses, which are amortized into annual pension expense as previously described.

At December 31, 2024 and 2023, the Company estimated the remaining lives of participants in the pension plans using the Society of Actuaries’ Pri-2012 Base Mortality Table. The no-collar table was used for salaried participants and the blue-collar table was used for hourly participants, both adjusted to reflect the historical experience of the Company’s participants and a geospatial mortality analysis. The Company selected the MP-2020 scale for mortality improvement at December 31, 2024 and 2023.

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Assumptions are selected on December 31 to calculate the succeeding year’s expense. The assumptions selected at December 31, 2024 are as follows:

Discount rate		6.00%
Rate of increase in future compensation levels		4.50%
Expected long-term rate of return on assets		6.75%
Average remaining service period for participants		9 years
Mortality Tables:
Base Table		Pri-2012
Mortality Improvement Scale		MP-2020

Using these assumptions, the Company's pension benefit obligation as of December 31, 2024 was $967 million and 2025 pension expense is expected to be approximately $23 million based on current demographics and structure of the plans. Changes in the underlying assumptions would have the following estimated impact on the obligation and expected expense:

The Company made pension plan and SERP contributions of $34 million in 2024 and $328 million during the five-year period ended December 31, 2024. In total, the Company’s pension plans are overfunded (fair value of plan assets exceeds the projected benefit obligation) by $271 million at December 31, 2024. The Company expects to make pension plan and SERP contributions of $40 million in 2025, of which $25 million is voluntary.

For additional information about pension benefit obligation and pension expense, see Note J to the consolidated financial statements.

Estimated Effective Income Tax Rate

The Company uses the liability method to determine its provision for income taxes. Accordingly, the annual provision for income taxes reflects estimates of the current liability for income taxes, estimates of the tax effect of financial reporting versus tax basis differences using statutory income tax rates and management’s judgment with respect to any valuation allowances on deferred tax assets and accruals for uncertain tax positions. The result is management’s estimate of the annual effective tax rate (the ETR).

Income for tax purposes is determined through the application of the rules and regulations under the United States Internal Revenue Code and the statutes of various foreign, state and local tax jurisdictions in which the Company conducts business. Changes in the statutory tax rates and/or tax laws in these jurisdictions, as well as changes in the geographic mix of earnings, can have a material impact on the ETR and the carrying value of deferred tax assets and liabilities. The effect of statutory tax law changes, if material, is recognized when the change is enacted.

Deferred tax assets representing future tax benefits are analyzed by evaluating all available evidence, both positive and negative, to determine whether, based on the weight of that evidence, all or a portion of the expected future benefits is more-likely-than-not to be realized by the Company. This analysis requires management to make certain estimates and assumptions about future taxable income and prudent and feasible tax planning strategies. The establishment or increase of a valuation allowance increases income tax expense in the period such a determination is made; conversely, the decrease of a valuation allowance decreases income tax expense in the period such a determination is made.

The Company recognizes a tax benefit when it is judged to be more‐likely‐than‐not, based on the technical merits, that a tax position would be sustained upon examination by a taxing authority. The amount to be recognized is measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information.

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The Company holds equity investments in renewable energy tax credit (RETC) projects which qualify for certain tax benefits. All of the Company's RETC investments are accounted for under the proportional amortization method. Under the proportional amortization method, the equity investment is amortized in proportion to the income tax credits and other income tax benefits received, with the amortization expense and the income tax benefits presented on a net basis in the Income tax expense or benefit line item in the consolidated statements of earnings.

For additional information about income taxes, see Note I to the consolidated financial statements.

Property, Plant and Equipment

Net property, plant and equipment represented 56% of total assets at December 31, 2024. Useful lives of the assets can vary depending on factors, including production levels, geographic location, portability and maintenance practices. Additionally, climate and inclement weather can reduce the useful life of an asset. Historically, the Company has not recognized significant losses on the disposal or retirement of fixed assets.

Aggregates mineral reserves and mineral interests are components within the property, plant and equipment balance on the consolidated balance sheets. The Company evaluates aggregates reserves, including those used in cement manufacturing, in several ways, depending on the geology at a particular location and whether the location is a greensite, an acquisition or an existing operation. Greensites require an extensive drilling program before any significant investment is made in terms of time, site development or efforts to obtain appropriate zoning and permitting (see Environmental Regulation and Litigation section). The depth of overburden (the layer of soil and other materials that lie above a mineral deposit) and the quality and quantity of the aggregates reserves are significant factors in determining whether to pursue opening the site. Further, the estimated average selling price for products in a market is also a significant factor in concluding that reserves are economically mineable. If the Company’s analysis based on these factors is satisfactory, the total aggregates reserves available are calculated and a determination is made whether to open the location. Reserve evaluation at existing locations is typically performed to evaluate purchasing adjoining properties, for quality control, calculating overburden volumes and for mine planning. Reserve evaluation of acquisitions may require a higher degree of sampling to verify the total reserves.

The quality of reserves within a deposit can vary. Construction contracts, for the infrastructure market in particular, include specifications related to the aggregates material properties. If a limiting characteristic in the deposit is discovered, the aggregates material may not meet the required specifications. Although it is possible that the aggregates material can still be used for non-specification uses, this can have an adverse impact on the Company’s ability to serve certain customers or the Company’s profitability. In addition, other factors can arise that influence the Company’s ability to develop reserves, including geological occurrences, mining practices, environmental requirements and zoning ordinances.

In determining the amount of reserves, evaluations are completed by or under the supervision of qualified person(s) using industry best practices and internal controls defined by the Company. The designations the Company uses for reserve categories and those recognized by the aggregate industry are summarized as follows:

Mineral Reserves – Mineral reserves are an estimate of tonnage and grade or quality that, in the opinion of a qualified person, can be the basis of an economically viable project. More specifically, it is the economically mineable part of a mineral resource, which includes diluting materials and allowances for losses that may occur when the material is mined or extracted. Reserves are categorized as Proven and Probable and represent net tons after consideration of applicable losses incurred during mining and plant processing.

Proven Reserves – Proven reserves are the portion of a mineral deposit for which quantity and quality are estimated on the basis of conclusive evidence from closely spaced drilling and sampling.

Probable Reserves – Probable reserves are estimated on the basis of less geologic evidence but are considered adequate for determining the quantity and quality.

The Company’s proven and probable reserves reflect reasonable economic and operating constraints and also include reserves at the Company’s inactive and undeveloped sites, including some sites where permitting and zoning applications will not be pursued until warranted by expected future growth. The Company has historically been successful in obtaining and maintaining appropriate zoning and permitting (see Environmental Regulation and Litigation section). The Company bases estimates on the information known at the time of determination and regularly reevaluates reserves whenever new information indicates a material change in reserves at one of the Company’s sites.

For additional information about property, plant and equipment, see Note F to the consolidated financial statements.

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Forward-Looking Statements – Safe Harbor Provisions Under the Private Securities Litigation Reform Act of 1995

If you are interested in Martin Marietta stock, management recommends that, at a minimum, you read the Company’s current annual report and Forms 10-K, 10-Q and 8-K reports to the Securities and Exchange Commission (SEC) over the past year. The Company’s recent proxy statement for the annual meeting of shareholders also contains important information. These and other materials that have been filed with the SEC are accessible through the Company’s website at www.martinmarietta.com and are also available at the SEC’s website at www.sec.gov . You may also write or call the Company’s Corporate Secretary, who will provide copies of such reports.

Investors are cautioned that all statements in this Annual Report that relate to the future involve risks and uncertainties, and are based on assumptions that the Company believes in good faith are reasonable but which may be materially different from actual results. These statements, which are forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934 and 27A of the Securities Act of 1933, and are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, provide the investor with the Company’s expectations or forecasts of future events. You can identify these statements by the fact that they do not relate only to historical or current facts. They may use words such as “anticipate,” “may,” “expect,” “should,” “believe,” “project,” “intend,” “will,” and other words of similar meaning in connection with future events or future operating or financial performance. In addition to the statements included in this report, we may from time to time make other oral or written forward-looking statements in other filings under the Securities Exchange Act of 1934 or in other public disclosures. Any, or all, of management’s forward-looking statements herein and in other publications may turn out to be wrong.

These forward-looking statements are subject to risks and uncertainties, and are based on assumptions that may be materially different from actual results, and include, but are not limited to:

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Further, increased highway construction funding pressures resulting from either federal or state issues could result in reduced construction spending, which could in turn affect profitability. Cement is subject to cyclical supply and demand and price fluctuations.

The Company’s principal business serves customers in construction markets. This concentration could increase the risk of potential losses on customer receivables; however, payment bonds normally posted on public projects, together with lien rights on private projects, mitigate the risk of uncollectible receivables. The level of demand in the Company’s end-use markets, production levels and the management of production costs will affect the operating leverage of the Building Materials business and, therefore, profitability. Production costs in the Building Materials business are also sensitive to energy and raw material prices, both directly and indirectly. Diesel fuel, natural gas, coal and other consumables change production costs directly through consumption or indirectly by increased energy-related input costs, such as steel, explosives, tires and conveyor belts. Fluctuating diesel fuel pricing also affects transportation costs, primarily through fuel surcharges in the Company’s long-haul distribution network. The Magnesia Specialties business is sensitive to changes in domestic steel capacity utilization as well as the absolute price and fluctuation in the cost of natural gas.

Transportation in the Company’s long-haul network, particularly the supply of railcars and locomotive power and condition of rail infrastructure to move trains, affects the Company’s efficient transportation of aggregates products in certain markets, most notably Texas, the Southeast and the Gulf Coast. In addition, availability of railcars and locomotives affects the Company’s movement of essential dolomitic lime for magnesia chemicals to both the Company’s plant in Manistee, Michigan, and its customers. The availability of trucks, drivers and railcars to transport the Company’s products, particularly in markets experiencing high growth and increased demand, is also a risk and pressures the associated costs.

All of the Company’s businesses are also subject to weather-related risks that can significantly affect production schedules and profitability. The first and fourth quarters are most adversely affected by winter weather. Hurricane and cyclone activity in the Atlantic Ocean, Pacific Ocean and Gulf Coast generally is most active during the second, third and fourth quarters.

In addition to the foregoing, other factors that could cause actual results to differ materially from the forward-looking statements in this Annual Report include but are not limited to those listed above in Item 1, Business – Competition , Item 1A, Risk Factors , and Note A: Accounting Policies and Note N: Commitments and Contingencies of the Notes to Financial Statements of the audited consolidated financial statements included in this Form 10-K.

You should consider these forward-looking statements in light of risk factors discussed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 and other filings made with the SEC. All of the Company’s forward-looking statements should be considered in light of these factors. In addition, other risks and uncertainties not presently known to the Company or that the Company considers immaterial could affect the accuracy of its forward-looking statements, or adversely affect or be material to the Company. All forward-looking statements are made as of the date of filing or publication and we assume no obligation to update any such forward-looking statements.

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ITEM 7A – QUANTITATIVE AND QUALITAT IVE DISCLOSURES ABOUT MARKET RISK

As discussed earlier, the Company’s operations are highly dependent upon the interest rate-sensitive construction and steelmaking industries. Consequently, these marketplaces could experience lower levels of economic activity in an environment of rising interest rates or escalating costs (see Business Environment section included under Item 7 – MD&A of this Form 10-K).

Management has considered the current economic environment and its potential impact to the Company’s business. Demand for aggregates products, particularly in the infrastructure construction market, is affected by federal, state and local budget and deficit issues. Further, delays or cancellations of capital projects in the nonresidential and residential construction markets could occur if companies and consumers are unable to obtain affordable financing for construction projects or if consumer confidence is eroded by economic uncertainty.

Demand in the nonresidential and residential construction markets, which combined accounted for 58% of the Company's 2024 aggregates shipments, is affected by interest rates. While the Federal Reserve lowered the target federal funds rate several times during 2024, it remains above historical levels.

Aside from these inherent risks from within its operations, the Company’s earnings are also affected by changes in short-term interest rates and changes in enacted tax laws.

Variable-Rate Borrowing Facilities

At December 31, 2024, the Company had an $800 million Revolving Facility and a $400 million Trade Receivable Facility. Borrowings under these facilities bear interest at a variable interest rate. As of December 31, 2024, the Company did not have any outstanding variable-rate borrowings. However, any future borrowings under the credit facilities or outstanding variable-rate debt are exposed to interest rate risk.

Pension Expense

The Company’s results of operations are affected by its pension expense. Assumptions that affect pension expense include the discount rate and, for the qualified defined benefit pension plan only, the expected long-term rate of return on pension assets. Therefore, the Company has interest rate risk associated with these factors. The impact of hypothetical changes in these assumptions on the Company’s annual pension expense and accrued pension obligation is discussed in the Critical Accounting Policies and Estimates – Pension Benefit Obligation and Pension Expense – Selection of Assumptions section included under Item 7 – MD&A of this Form 10-K.

Income Tax

Any changes in enacted tax laws, rules or regulatory or judicial interpretation, or any change in the pronouncements relating to accounting for income taxes, could materially impact the Company's effective tax rate, tax payments, cash flow, financial condition and results of operations.

Energy Costs

Energy costs, including diesel fuel, natural gas, electricity, coal and petroleum coke, represent significant production costs of the Company. The cement product line and Magnesia Specialties business each have varying fixed-price agreements for a portion of their future energy requirements. The Company may be unable to pass along increases in the costs of energy to customers in the form of price increases for the Company’s products. A hypothetical 10% change in the Company’s energy prices in 2025 as compared with 2024, assuming constant volumes, would change 2025 energy expense by $32 million.

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ITEM 8 – FINANCIAL STATEMEN TS AND SUPPLEMENTARY DATA

Index to Consolidated Financial Statements			Page
	Statement of Responsibility and Management’s Report on Internal Control over Financial Reporting		63
	Report of Independent Registered Public Accounting Firm		65
	Consolidated Statements of Earnings – for years ended December 31, 2024, 2023 and 2022		67
	Consolidated Statements of Comprehensive Earnings – for years ended December 31, 2024, 2023 and 2022		68
	Consolidated Balance Sheets – at December 31, 2024 and 2023		69
	Consolidated Statements of Cash Flows – for years ended December 31, 2024, 2023 and 2022		70
	Consolidated Statements of Total Equity – for years ended December 31, 2024, 2023 and 2022		71
	Notes to Financial Statements		72

Statement of Responsibility and Management’s Report on Internal Control over Financial Reporting

Management’s Statement of Responsibility

The management of Martin Marietta Materials, Inc. (the Company or Martin Marietta) is responsible for the consolidated financial statements, the related financial information contained in this Form 10-K and the establishment and maintenance of adequate internal control over financial reporting. The consolidated balance sheets for Martin Marietta, at December 31, 2024 and 2023, and the related consolidated statements of earnings, comprehensive earnings, total equity and cash flows for each of the three years in the period ended December 31, 2024, include amounts based on estimates and judgments and have been prepared in accordance with accounting principles generally accepted in the United States applied on a consistent basis.

A system of internal control over financial reporting is designed to provide reasonable assurance, in a cost-effective manner, that assets are safeguarded, transactions are executed and recorded in accordance with management’s authorization, accountability for assets is maintained and financial statements are prepared and presented fairly in accordance with accounting principles generally accepted in the United States. Internal control systems over financial reporting have inherent limitations and may not prevent or detect misstatements. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.

The Company operates in an environment that establishes an appropriate system of internal control over financial reporting and ensures that the system is maintained, assessed and monitored on a periodic basis. This internal control system includes examinations by internal audit staff and oversight by the Audit Committee of the Board of Directors.

The Company’s management recognizes its responsibility to foster a strong ethical climate. Management has issued written policy statements that document the Company’s business code of ethics. The importance of ethical behavior is regularly communicated to all employees through the distribution of the Code of Ethical Business Conduct and through ongoing education and review programs designed to create a strong commitment to ethical business practices.

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The Audit Committee of the Board of Directors, which consists of four independent, nonemployee directors, meets periodically and separately with management, the independent auditors and the internal auditors to review the activities of each. The Audit Committee meets standards established by the Securities and Exchange Commission (SEC) and the New York Stock Exchange as they relate to the composition and practices of audit committees.

Management’s Report on Internal Control over Financial Reporting

The management of Martin Marietta is responsible for establishing and maintaining adequate internal control over financial reporting. Management assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2024. In making this assessment, management used the criteria set forth in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework). Based on management’s assessment under the 2013 framework, management concluded that the Company’s internal control over financial reporting was effective as of December 31, 2024.

The consolidated financial statements of the Company as of December 31, 2024 and 2023, and for each of the three years in the period ended December 31, 2024, and the effectiveness of the Company’s internal control over financial reporting as of December 31, 2024, have been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, whose report appears on the following pages.

C. Howard Nye, Chair, President and Chief Executive Officer	James A. J. Nickolas , Executive Vice President and Chief Financial Officer

February 21, 2025

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Report of Independent Registe red Public Accounting Firm

To the Board of Directors and Shareholders of Martin Marietta Materials, Inc.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the

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company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Acquisition of BWI Southeast – Valuation of Mineral Reserves

As described in Note B to the consolidated financial statements, on April 5, 2024, the Company completed the acquisition of 20 active aggregates operations in Alabama, South Carolina, South Florida, Tennessee, and Virginia from affiliates of Blue Water Industries LLC (BWI Southeast) for $2.05 billion in cash, which resulted in the Company recording mineral reserves of $1.9 billion . As disclosed by management, the fair value of mineral reserves is determined using an excess earnings approach, which requires significant judgment to estimate future cash flows based on available historical information and future expectations, as well as significant assumptions, which include forecasted revenues based on sales price and shipment volumes, EBITDA margin, forecasted expenses inclusive of production costs and capital needs, and the discount rate.

The principal considerations for our determination that performing procedures relating to the valuation of mineral reserves acquired in the acquisition of BWI Southeast is a critical audit matter are (i) the significant judgment by management when developing the fair value estimate of the mineral reserves acquired; (ii) a high degree of auditor judgment, subjectivity and effort in performing procedures and evaluating management’s significant assumptions related to forecasted revenues, EBITDA margin and the discount rate; and (iii) the audit effort involved the use of professionals with specialized skill and knowledge.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included testing the effectiveness of controls relating to the acquisition accounting, including controls over management’s valuation of the mineral reserves acquired. These procedures also included, among others, (i) reading the purchase agreement; (ii) testing management’s process for developing the fair value estimate of the mineral reserves acquired; (iii) evaluating the appropriateness of the excess earnings approach; (iv) testing the completeness and accuracy of the underlying data used in the excess earnings approach; and (v) evaluating the reasonableness of the significant assumptions used by management related to forecasted revenues, EBITDA margin and the discount rate. Evaluating management's assumptions related to forecasted revenues and EBITDA margin involved considering (i) the current and past performance of the BWI Southeast business; (ii) the current and past performance of peer companies; (iii) the consistency with external market and industry data; and (iv) whether the assumptions were consistent with evidence obtained in other areas of the audit. Professionals with specialized skill and knowledge were used to assist in evaluating (i) the appropriateness of the excess earnings approach and (ii) the reasonableness of the discount rate assumption.

/s/ PricewaterhouseCoopers LLP

Raleigh, North Carolina

February 21, 2025

We have served as the Company’s auditor since 2016.

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Financial Statements

Martin Marietta Materials, Inc. and Consolidated Subsidiaries Consolidated Statements of Earnings
years ended December 31 (in millions, except per share data)			2024					2023					2022
Revenues			$	6,536				$	6,777				$	6,161
Cost of revenues				4,658					4,754					4,738
Gross Profit				1,878					2,023					1,423
Selling, general and administrative expenses				447					443					397
Acquisition, divestiture and integration expenses				50					12					9
Other operating income, net				( 1,326	)				( 28	)				( 190	)
Earnings from Operations				2,707					1,596					1,207
Interest expense				169					165					169
Other nonoperating income, net				( 58	)				( 62	)				( 53	)
Earnings from continuing operations before income tax expense				2,596					1,493					1,091
Income tax expense				600					293					235
Earnings from continuing operations				1,996					1,200					856
(Loss) Earnings from discontinued operations, net of income tax (benefit) expense				—					( 30	)				11
Consolidated net earnings				1,996					1,170					867
Less: Net earnings attributable to noncontrolling interests				1					1					—
Net Earnings Attributable to Martin Marietta			$	1,995				$	1,169				$	867
Net Earnings (Loss) Attributable to Martin Marietta Per Common Share (see Note A)
Basic earnings per share from continuing operations attributable to common shareholders			$	32.50				$	19.38				$	13.74
Basic (loss) earnings per share from discontinued operations attributable to common shareholders				—					( 0.50	)				0.17
			$	32.50				$	18.88				$	13.91
Diluted earnings per share from continuing operations attributable to common shareholders			$	32.41				$	19.32				$	13.70
Diluted (loss) earnings per share from discontinued operations attributable to common shareholders				—					( 0.50	)				0.17
			$	32.41				$	18.82				$	13.87
Weighted-Average Common Shares Outstanding
Basic				61.4					61.9					62.3
Diluted				61.6					62.1					62.5

The accompanying Notes to the Financial Statements are an integral part of these statements.

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Martin Marietta Materials, Inc. and Consolidated Subsidiaries Consolidated Statements of Comprehensive Earnings
years ended December 31 (in millions)			2024					2023					2022
Consolidated Net Earnings			$	1,996				$	1,170				$	867
Other comprehensive earnings (loss), net of tax:
Defined benefit pension and postretirement plans:
Net gain (loss) arising during period, net of tax of $ 11 , $( 5 ) and $ 29 , respectively				33					( 16	)				88
Prior service cost arising during period, net of tax of $ 0 , $ 0 and $( 12 ), respectively				—					—					( 36	)
Amortization of prior service cost, net of tax of $ 1 , $ 2 and $ 1 , respectively				5					4					3
Amortization of actuarial loss, net of tax of $ 0 , $ 0 and $ 1 , respectively				1					—					3
Amount recognized in net periodic pension cost due to settlement, net of tax of $ 0 , $ 0 and $ 1 , respectively				—					—					4
				39					( 12	)				62
Foreign currency translation (loss) gain				( 3	)				1					( 2	)
				36					( 11	)				60
Comprehensive Earnings Attributable to Martin Marietta			$	2,032				$	1,159				$	927

The accompanying Notes to the Financial Statements are an integral part of these statements.

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Martin Marietta Materials, Inc. and Consolidated Subsidiaries Consolidated Balance Sheets
December 31 (in millions, except share and par value data)			2024					2023
Assets
Current Assets:
Cash and cash equivalents			$	670				$	1,272
Restricted cash				—					10
Accounts receivable, net				678					753
Inventories, net				1,115					989
Current assets held for sale				8					807
Other current assets				71					88
Total Current Assets				2,542					3,919
Property, plant and equipment, net				10,109					6,186
Goodwill				3,767					3,389
Other intangibles, net				730					698
Operating lease right-of-use assets, net				376					372
Other noncurrent assets				646					561
Total Assets			$	18,170				$	15,125
Liabilities and Equity
Current Liabilities:
Accounts payable			$	375				$	343
Accrued salaries, benefits and payroll taxes				73					102
Accrued income taxes				102					6
Accrued other taxes				50					47
Accrued interest				45					41
Current maturities of long-term debt				125					400
Current operating lease liabilities				56					53
Other current liabilities				190					178
Total Current Liabilities				1,016					1,170
Long-term debt				5,288					3,946
Deferred income taxes, net				1,169					874
Noncurrent operating lease liabilities				335					327
Noncurrent asset retirement obligations				423					383
Other noncurrent liabilities				483					389
Total Liabilities				8,714					7,089
Commitments and Contingent Liabilities - Note N
Equity:
Common stock ($ 0.01 par value; 100,000,000 shares authorized; 61,126,646 shares and 61,821,421 shares outstanding at December 31, 2024 and 2023, respectively)				1					1
Preferred stock ($ 0.01 par value; 10,000,000 shares authorized; no shares outstanding)				—					—
Additional paid-in capital				3,550					3,519
Accumulated other comprehensive loss				( 13	)				( 49	)
Retained earnings				5,915					4,563
Total Shareholders’ Equity				9,453					8,034
Noncontrolling interests				3					2
Total Equity				9,456					8,036
Total Liabilities and Equity			$	18,170				$	15,125

The accompanying Notes to the Financial Statements are an integral part of these statements.

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Martin Marietta Materials, Inc. and Consolidated Subsidiaries Consolidated Statements of Cash Flows
years ended December 31 (in millions)			2024					2023					2022
Cash Flows from Operating Activities:
Consolidated net earnings			$	1,996				$	1,170				$	867
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization				573					513					506
Stock-based compensation expense				58					50					43
Net gains on divestitures, sales of assets and extinguishment of debt				( 1,369	)				( 2	)				( 196	)
Deferred income taxes, net				( 45	)				( 36	)				( 1	)
Noncash portion of asset and portfolio rationalization charge				50					—					—
Other items, net				( 15	)				( 16	)				( 12	)
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net				81					31					( 12	)
Inventories, net				( 52	)				( 189	)				( 132	)
Accounts payable				17					( 17	)				( 31	)
Other assets and liabilities, net				165					24					( 41	)
Net Cash Provided by Operating Activities				1,459					1,528					991
Cash Flows from Investing Activities:
Additions to property, plant and equipment				( 855	)				( 650	)				( 482	)
Acquisitions, net of cash acquired				( 3,642	)				—					11
Proceeds from divestitures and sales of assets				2,160					427					687
Proceeds from sale of restricted investments to discharge long-term debt				—					700					—
Purchase of restricted investments to discharge long-term debt				—					—					( 704	)
Investments in limited liability company				( 117	)				( 27	)				—
Other investing activities, net				10					9					4
Net Cash (Used for) Provided by Investing Activities				( 2,444	)				459					( 484	)
Cash Flows from Financing Activities:
Borrowings of long-term debt				2,758					—					—
Repayments of long-term debt				( 1,690	)				( 700	)				( 54	)
Payments on finance lease obligations				( 20	)				( 17	)				( 15	)
Dividends paid				( 189	)				( 174	)				( 160	)
Repurchases of common stock				( 450	)				( 150	)				( 150	)
Shares withheld for employees’ income tax obligations				( 32	)				( 22	)				( 29	)
Other financing activities, net				( 4	)				( 1	)				1
Net Cash Provided by (Used for) Financing Activities				373					( 1,064	)				( 407	)
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash				( 612	)				923					100
Cash, Cash Equivalents and Restricted Cash, beginning of year				1,282					359					259
Cash, Cash Equivalents and Restricted Cash, end of year			$	670				$	1,282				$	359

The accompanying Notes to the Financial Statements are an integral part of these statements.

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Martin Marietta Materials, Inc. and Consolidated Subsidiaries Consolidated Statements of Total Equity
(in millions, except share and per share data)		Shares of Common Stock				Common Stock				Additional Paid-In Capital				Accumulated Other Comprehensive Loss				Retained Earnings				Total Shareholders’ Equity				Noncontrolling Interests				Total Equity
Balance at December 31, 2021			62,393,990			$	1			$	3,470			$	( 98	)		$	3,162			$	6,535			$	2			$	6,537
Consolidated net earnings			—				—				—				—				867				867				—				867
Other comprehensive earnings			—				—				—				60				—				60				—				60
Dividends declared ($ 2.54 per common share)			—				—				—				—				( 160	)			( 160	)			—				( 160	)
Issuances of common stock for stock award plans			126,699				—				5				—				—				5				—				5
Shares withheld for employees’ income tax obligations			—				—				( 29	)			—				—				( 29	)			—				( 29	)
Repurchases of common stock			( 418,336	)			—				—				—				( 150	)			( 150	)			—				( 150	)
Stock-based compensation expense			—				—				43				—				—				43				—				43
Balance at December 31, 2022			62,102,353				1				3,489				( 38	)			3,719				7,171				2				7,173
Consolidated net earnings			—				—				—				—				1,169				1,169				1				1,170
Other comprehensive loss			—				—				—				( 11	)			—				( 11	)			—				( 11	)
Dividends declared ($ 2.80 per common share)			—				—				—				—				( 174	)			( 174	)			—				( 174	)
Issuances of common stock for stock award plans			100,588				—				2				—				—				2				—				2
Shares withheld for employees’ income tax obligations			—				—				( 22	)			—				—				( 22	)			—				( 22	)
Repurchases of common stock			( 381,520	)			—				—				—				( 151	)			( 151	)			—				( 151	)
Stock-based compensation expense			—				—				50				—				—				50				—				50
Distribution to owners of noncontrolling interest			—				—				—				—				—				—				( 1	)			( 1	)
Balance at December 31, 2023			61,821,421				1				3,519				( 49	)			4,563				8,034				2				8,036
Consolidated net earnings			—				—				—				—				1,995				1,995				1				1,996
Other comprehensive earnings			—				—				—				36				—				36				—				36
Dividends declared ($ 3.06 per common share)			—				—				—				—				( 189	)			( 189	)			—				( 189	)
Issuances of common stock for stock award plans			90,983				—				5				—				—				5				—				5
Shares withheld for employees’ income tax obligations			—				—				( 32	)			—				—				( 32	)			—				( 32	)
Repurchases of common stock			( 785,758	)			—				—				—				( 454	)			( 454	)			—				( 454	)
Stock-based compensation expense			—				—				58				—				—				58				—				58
Balance at December 31, 2024			61,126,646			$	1			$	3,550			$	( 13	)		$	5,915			$	9,453			$	3			$	9,456

The accompanying Notes to the Financial Statements are an integral part of these statements.

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Notes to Financial Statements

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At both December 31, 2024 and 2023, $ 40 million of the Building Materials business’ property, plant and equipment, net, were located in The Bahamas and Canada.

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The carrying value and fair value of the Company’s long-term debt were $ 5.4 billion and $ 4.8 billion, respectively, at December 31, 2024 and $ 4.3 billion and $ 3.9 billion, respectively, at December 31, 2023. The estimated fair value of the Company’s publicly-registered long-term debt was estimated based on Level 1 of the fair value hierarchy using quoted market prices.

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Employees. Approximately 13 % of the Company’s employees are represented by a labor union. All such employees are hourly employees. The Company maintains collective bargaining agreements relating to the union employees within the Building Materials business and Magnesia Specialties segment. All of the hourly employees of the Magnesia Specialties segment, located in Manistee, Michigan, and Woodville, Ohio, are represented by labor unions. The Woodville collective bargaining agreement expires in June 2026 . The Manistee collective bargaining agreement expires in August 2027 .

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Service Revenues. Service revenues, which include paving operations located in California and Colorado, were $ 411 million, $ 411 million and $ 354 million for the years ended December 31, 2024, 2023 and 2022 , respectively.

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ITEM 9 – CHANGES IN AND DISAGREEMENTS WITH ACCO UNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A – CONTROL S AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

As of December 31, 2024, an evaluation was performed under the supervision and with the participation of the Company’s management, including the Chief Executive Officer (CEO) and Chief Financial Officer (CFO), of the effectiveness of the design and operation of the Company’s disclosure controls and procedures. Based on that evaluation, the Company’s CEO and CFO concluded that the Company’s disclosure controls and procedures were effective at the reasonable assurance level.

The foregoing evaluation of the Company’s disclosure controls and procedures was based on the definition in Exchange Act Rule 13a-15(e), which requires that disclosure controls and procedures are effectively designed to provide reasonable assurance that information required to be disclosed by an issuer in the reports that it files or submits with the SEC under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms, and is accumulated and communicated to the issuer’s management, including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

Management’s Report on Internal Control over Financial Reporting

Our management’s report on internal control over financial reporting is included as the Statement of Financial Responsibility and Management’s Report on Internal Controls over Financial Reporting in Item 8, Financial Statements and Supplemental Data of this Form 10-K. The Company’s management concluded that the Company’s internal control over financial reporting was effective in providing reasonable assurance regarding the reliability of financial reporting and the preparation of the Company’s financial statements for external purposes in accordance with U.S. generally accepted accounting principles as of December 31, 2024. PricewaterhouseCoopers LLP, the independent registered public accounting firm that audited the Company’s consolidated financial statements contained herein, also audited the Company’s internal control over financial reporting as of December 31, 2024. The audit report is included in Item 8, Financial Statements and Supplementary Data of this Form 10-K.

Changes in Internal Control over Financial Reporting

There were no changes in the Company’s internal control over financial reporting during the most recently completed fiscal quarter ended December 31, 2024 that materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

Limitations on the Effectiveness of Controls

The Company's management, including the CEO and CFO, does not expect that the Company’s control system will prevent all error and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision making can be faulty and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

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CEO and CFO Certifications

Included among the exhibits to this Form 10-K are forms of “Certifications” of the Company’s CEO and CFO as required in accordance with Section 302 of the Sarbanes-Oxley Act of 2002 (the “Section 302 Certification”). The Section 302 Certifications refer to this evaluation of the Company’s disclosure policies and procedures and internal control over financial reporting. The information in this section should be read in conjunction with the Section 302 Certifications for a more complete understanding of the topics presented.

ITEM 9B – OTHE R INFORMATION

During the three months ended December 31, 2024, no director or officer of the Company adopted or terminated a "Rule 10b5-1 trading arrangement" or adopted or terminated a "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) of Regulation S-K.

ITEM 9C – DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS

Not Applicable.

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PART III

ITEM 10 – DIRECTORS, EXECUTIVE O FFICERS AND CORPORATE GOVERNANCE

The information concerning directors of the Company, the Audit Committee of the Board of Directors, and the Audit Committee financial expert serving on the Audit Committee, all as required in response to this Item 10, is included under the captions "The Board of Directors," "Proposal 1: Election of Directors" and “Corporate Governance Matters” in the Company’s definitive proxy statement to be filed with the SEC pursuant to Regulation 14A within 120 days after the close of the Company’s fiscal year ended December 31, 2024 (the “2025 Proxy Statement”), and that information is hereby incorporated by reference in this Form 10-K. Information concerning Section 16(a) reporting compliance is incorporated by reference to the information appearing under the caption “Section 16(a) Reports” in the 2025 Proxy Statement. Information concerning executive officers of the Company required in response to this Item 10 is included in Part I, under the heading Information about our Executive Officers of this Form 10-K. The information concerning the Company’s code of ethics required in response to this Item 10 is included in Part I, under the heading Available Information of this Form 10‑K.

The Company has adopted an insider trading policy governing the purchase, sale and other dispositions of the Company’s securities that applies to all Company personnel, including directors, officers, employees, and other covered persons. The Company also follows procedures for the repurchase of its securities. The Company believes that its insider trading policy and repurchase procedures are reasonably designed to promote compliance with insider trading laws, rules and regulations, and listing standards applicable to the Company. A copy of the Company’s insider trading policy is filed as Exhibit 19.01 to this Form 10-K.

ITEM 11 – EXECUT IVE COMPENSATION

The information required in response to this Item 11 is included under the captions “Executive Compensation,” “Compensation Discussion and Analysis,” “Required Pay Disclosures,” “Corporate Governance Matters,” “Management Development and Compensation Committee Report,” and “Compensation Committee Interlocks and Insider Participation” in the Company’s 2025 Proxy Statement, and that information is hereby incorporated by reference in this Form 10-K.

ITEM 12 – SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required in response to this Item 12 is included under the captions “General Information,” “Security Ownership of Certain Beneficial Owners and Management,” and “Securities Authorized for Issuance Under Equity Compensation Plans” in the Company’s 2025 Proxy Statement, and that information is hereby incorporated by reference in this Form 10-K.

ITEM 13 – CERTAIN RELATIONSHIPS AND RELATE D TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required in response to this Item 13 is included under the captions “Compensation Committee Interlocks and Insider Participation in Compensation Decisions” and “Corporate Governance Matters” in the Company’s 2025 Proxy Statement, and that information is hereby incorporated by reference in this Form 10-K.

ITEM 14 – PRINCIPAL ACCOU NTANT FEES AND SERVICES

The information required in response to this Item 14 is included under the caption “Independent Auditors” in the Company’s 2025 Proxy Statement, and that information is hereby incorporated by reference in this Form 10-K.

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PART IV

ITEM 15 – EXHIBITS AND FINA NCIAL STATEMENT SCHEDULES

(a) (1) List of financial statements filed as part of this Form 10-K

The consolidated financial statements of Martin Marietta and consolidated subsidiaries, and related notes, appear in Item 8, Financial Statements and Supplemental Data of this Form 10-K.

(a) (2) List of financial statement schedules filed as part of this Form 10-K

The following financial statement schedule of Martin Marietta and consolidated subsidiaries is included in Item 15(c) of this Form 10-K.

Schedule II - Valuation and Qualifying Accounts

All other schedules have been omitted because they are not applicable, not required, or the information has been otherwise supplied in the financial statements or notes to the financial statements.

The report of the Company’s independent registered public accounting firm with respect to the above-referenced financial statements is included in Item 8, Financial Statements and Supplemental Data of this Form 10-K. The consent of the Company’s independent registered public accounting firm is attached as Exhibit 23.01 to this Form 10-K.

(a) (3) Exhibits

The list of Exhibits on the accompanying Index of Exhibits included in Item 15(b) of this Form 10-K is hereby incorporated by reference. Each management contract or compensatory plan or arrangement required to be filed as an exhibit is indicated by asterisks.

(b) Index of Exhibits

Exhibit No.
2.01	Equity and Asset Purchase Agreement, dated as of November 20, 2023, among Martin Marietta Materials, Inc., CRH Americas Materials, Inc. and CRH plc (incorporated by reference to Exhibit 2.1 to the Martin Marietta Materials, Inc., Current Report on Form 8-K filed on November 24, 2023) (Commission File No. 1-12744)
3.01	Restated Articles of Incorporation of the Company, as amended (incorporated by reference to Exhibit 3.01 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filed on February 24, 2017) (Commission File No. 1-12744)
3.02	Restated Bylaws of the Company (incorporated by reference to Exhibit 3.1 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on November 14, 2022) (Commission File No. 1-12744)
4.01	Specimen Common Stock Certificate (incorporated by reference to Exhibit 4.01 to the Martin Marietta Materials, Inc. registration statement on Form S-1, filed on December 8, 1993 (SEC Registration No. 33-72648) (P)
4.02	Article 5 of the Company’s Restated Articles of Incorporation, as amended (incorporated by reference to Exhibit 3.01 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filed on February 24, 2017) (Commission File No. 1-12744)
4.03	Article 1 of the Company’s Restated Bylaws, as amended (incorporated by reference to Exhibit 3.1 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on November 14, 2022) (Commission File No. 1-12744)
4.04	Indenture dated as of December 1, 1995 between Martin Marietta Materials, Inc. and First Union National Bank of North Carolina (incorporated by reference to Exhibit 4(a) to the Martin Marietta Materials, Inc. registration statement on Form S-3 (SEC Registration No. 33-99082)) (P)

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Exhibit No.
4.05	Form of Martin Marietta Materials, Inc. 7% Debenture due 2025 (incorporated by reference to Exhibit 4(a)(i) to the Martin Marietta Materials, Inc. registration statement on Form S-3 (SEC Registration No. 33-99082)) (P)
4.06	Indenture dated as of April 30, 2007 between Martin Marietta Materials, Inc. and Truist Bank (as successor by merger to SunTrust Bank and formerly known as Branch Banking and Trust Company, Inc.), as trustee (incorporated by reference to Exhibit 4.1 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on April 30, 2007 (Commission File No. 1-12744))
4.07	Second Supplemental Indenture, dated as of April 30, 2007, between Martin Marietta Materials, Inc. and Truist Bank, as trustee, to that certain Indenture dated as of April 30, 2007 between Martin Marietta Materials, Inc. and Truist Bank, as trustee, pursuant to which were issued $250,000,000 aggregate principal amount of 6 ¼% Senior Notes due 2037 of Martin Marietta Materials, Inc. (incorporated by reference to Exhibit 4.3 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on April 30, 2007 (Commission File No. 1-12744))
4.08	Purchase Agreement dated as of June 23, 2014 among Martin Marietta Materials, Inc. and Deutsche Bank Securities Inc. and J.P. Morgan Securities LLC, as representatives of the several initial purchasers named in Schedule 1 thereto (incorporated by reference to Exhibit 10.1 of the Company’s Current Report on Form 8-K, filed on June 24, 2014) (Commission File No. 1-12744)
4.09	Indenture, dated as of July 2, 2014, between Martin Marietta Materials, Inc. and Regions Bank, as trustee (incorporated by reference to Exhibit 4.1 of the Company’s Current Report on Form 8-K, filed on July 2, 2014) (Commission File No. 1-12744)
4.10	Form of 4.250% Senior Notes due 2024 (included in Exhibit 4.09)
4.11	Indenture, dated as of May 22, 2017, between Martin Marietta Materials, Inc. and Regions Bank, as trustee (incorporated by reference to Exhibit 4.1 of the Company’s Current Report on Form 8-K, filed on May 22, 2017) (Commission File No. 1-12744)
4.12	First Supplemental Indenture, dated as of May 22, 2017, between Martin Marietta Materials, Inc. and Regions Bank, as trustee, governing the Senior Notes issued by the Company on May 22, 2017, in the form of the $300 million aggregate principal amount of Floating Rate Senior Notes due 2020 and $300 million aggregate principal amount of 3.450% Senior Notes due 2027 (incorporated by reference to Exhibit 4.2 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on May 22, 2017 (Commission File No. 1-12744))
4.13	Form of 3.450% Senior Notes due 2027 (included in Exhibit 4.12)
4.14	Second Supplemental Indenture, dated as of December 20, 2017, between Martin Marietta Materials, Inc. and Regions Bank, as trustee, governing the Senior Notes issued by the Company on December 20, 2017, in the form of the $300 million aggregate principal amount of Floating Rate Senior Notes due 2019, $500 million aggregate principal amount of 3.500% Senior Notes due 2027, and $600 million aggregate principal amount of 4.250% Senior Notes due 2047 (incorporated by reference to Exhibit 4.2 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on December 20, 2017 (Commission File No. 1-12744))
4.15	Form of 3.500% Senior Notes due 2027 (included in Exhibit 4.14)
4.16	Form of 4.250% Senior Notes due 2047 (included in Exhibit 4.14)
4.17	Third Supplemental Indenture, dated as of March 16, 2020, between Martin Marietta Materials, Inc. and Regions Bank, as trustee, governing the Senior Notes issued by the Company on March 16, 2020, in the form of $500 million aggregate principal amount of 2.500% Senior Notes due 2030 (incorporated by reference to Exhibit 4.2 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on March 16, 2020 (Commission File No. 1-12744))
4.18	Form of 2.500% Senior Notes due 2030 (contained in Exhibit 4.17)
4.19	Fourth Supplemental Indenture, dated as of July 2, 2021, between Martin Marietta Materials, Inc. and Regions Bank, as trustee (incorporated by reference to Exhibit 4.2 of the Company’s Current Report on Form 8-K, filed on July 2, 2021) (Commission File No. 1-12744)
4.20	Form of 2.400% Senior Notes due 2031 (contained in Exhibit 4.19)
4.21	Form of 3.200% Senior Notes due 2051 (contained in Exhibit 4.19)

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Exhibit No.
4.22	Fifth Supplemental Indenture, dated as of November 4, 2024, between Martin Marietta Materials, Inc. and Regions Bank, as trustee, (incorporated by reference to Exhibit 4.2 of the Company’s Current Report on Form 8-K, filed on November 4, 2024) (Commission File No. 1-12744)
4.23	Form of 5.150% Senior Notes due 2034 (contained in Exhibit 4.22)
4.24	Form of 5.500% Senior Notes due 2054 (contained in Exhibit 4.22)
4.25	Description of the Company’s Capital Stock (incorporated by reference to Exhibit 4.17 to the Martin Marietta Materials, Inc. Current Report on Form 10-K for the fiscal year ended December 31, 2019 (Commission File No. 1-12744))
10.01	$800,000,000 Credit Agreement dated as of December 21, 2021 among Martin Marietta Materials, Inc., JPMorgan Chase Bank, N.A., as Administrative Agent, and Deutsche Bank AG New York Branch, PNC Bank, National Association, Truist Bank, and Wells Fargo Bank, National Association, as Co-Syndication Agents (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc., Current Report on Form 8-K filed on December 27, 2021) (Commission File No. 1-12744)
10.02	Loan Modification No. 1 and Extension Agreement dated as of December 22, 2022, among Martin Marietta Materials, Inc., the Lenders party thereto and JPMorgan Chase Bank, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc., Current Report on Form 8-K filed on December 22, 2022) (Commission File No. 1-12744)
10.03	Loan Modification No. 2 and Extension Agreement dated as of December 21, 2023 among the Corporation, the Lenders party thereto and JPMorgan Chase Bank, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc., Current Report on Form 8-K filed on December 21, 2023) (Commission File No. 1-12744)
10.04	Loan Modification No. 3 and Extension Agreement dated as of December 20, 2024 among the Corporation, the Lenders party thereto and JPMorgan Chase Bank, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc., Current Report on Form 8-K filed on December 20, 2024) (Commission File No. 1-12744)
10.05	Credit and Security Agreement dated as of April 19, 2013, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, as lender, together with the other lenders from time to time party thereto, and Truist Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on April 24, 2013) (Commission File No. 1-12744)
10.06	Commitment Letter dated as of June 20, 2014 to the Credit and Security Agreement, dated as of April 19, 2013 (as last amended April 18, 2014), among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, as lender, together with the other lenders from time to time party thereto, and Truist Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on June 25, 2014) (Commission File No. 1-12744)
10.07	Second Amendment to Credit and Security Agreement, dated as of April 18, 2014, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, as lender, together with the other lenders from time to time party thereto, and Truist Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on April 24, 2014) (Commission File No. 1-12744)
10.08	Fifth Amendment to Credit and Security Agreement, dated as of September 30, 2014, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, as lender, together with the other lenders from time to time party thereto, and Truist Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on October 3, 2014) (Commission File No. 1-12744)
10.09	Seventh Amendment to Credit and Security Agreement, dated as of September 28, 2016, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, as lender, together with the other lenders from time to time party thereto, and Truist Bank, as

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Exhibit No.
	administrative agent for the lenders (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on September 30, 2016) (Commission File No. 1-12744)
10.10	Ninth Amendment to Credit and Security Agreement, dated as of April 17, 2018, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, as lender, together with the other lenders from time to time party thereto, and Truist Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on April 17, 2018) (Commission File No. 1-12744)
10.11	Tenth Amendment to Credit and Security Agreement, dated as of September 28, 2018, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, as lender, together with the other lenders from time to time party thereto, and Truist Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on September 25, 2018) (Commission File No. 1-12744)
10.12	Eleventh Amendment to Credit and Security Agreement, dated as of September 24, 2019, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, as lender, together with the other lenders from time to time party thereto, and Truist Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on September 24, 2019) (Commission File No. 1-12744)
10.13	Twelfth Amendment to Credit and Security Agreement, dated as of September 23, 2020, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, successor by merger to SunTrust Bank, as lender together with the other lenders from time to time party thereto, and Truist Bank, successor by merger to Sun Trust Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on September 23, 2020) (Commission File No. 1-12744)
10.14	Thirteenth Amendment to Credit and Security Agreement, dated as of September 22, 2021, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, successor by merger to SunTrust Bank, as lender together with the other lenders from time to time party thereto, and Truist Bank, successor by merger to Sun Trust Bank, as administrative agent for the lenders (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on September 23, 2021) (Commission File No. 1-12744)
10.15	Fourteenth Amendment to Credit Agreement, dated as of September 21, 2022, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, successor by merger to SunTrust Bank, as lender together with the other lenders from time to time party thereto, and Truist Bank, successor by merger to Sun Trust Bank, as administrative agent for the lenders (including a conformed copy of the Credit Agreement attached as Exhibit A thereto) (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on September 21, 2022) (Commission File No. 1-12744)
10.16	Fifteenth Amendment to Credit Agreement, dated as of September 20, 2023, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, successor by merger to SunTrust Bank, as lender together with the other lenders from time to time party thereto, and Truist Bank, successor by merger to Sun Trust Bank, as administrative agent for the lenders (including a conformed copy of the Credit Agreement attached as Exhibit A thereto) (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc., Current Report on Form 8-K filed on September 20, 2023) (Commission File No. 1-12744)
10.17	Sixteenth Amendment to Credit Agreement, dated as of September 18, 2024, among Martin Marietta Funding LLC, as borrower, Martin Marietta Materials, Inc., as servicer, and Truist Bank, successor by merger to SunTrust Bank, as lender together with the other lenders from time to time party thereto, and Truist Bank, successor by merger to Sun Trust Bank, as administrative agent for the lenders (including a conformed copy of the Credit Agreement attached as Exhibit A thereto) (incorporated by

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Exhibit No.
	reference to Exhibit 10.1 to the Martin Marietta Materials, Inc., Current Report on Form 8-K filed on September 19, 2024) (Commission File No. 1-12744)
10.18	Purchase and Contribution Agreement dated as of April 19, 2013, between Martin Marietta Materials, Inc., as seller and as servicer, and Martin Marietta Funding LLC, as buyer (incorporated by reference to Exhibit 10.02 to the Martin Marietta Materials, Inc. Current Report on Form 8-K filed on April 24, 2013) (Commission File No. 1-12744)
10.19	Form of Martin Marietta Materials, Inc. Third Amended and Restated Employment Protection Agreement (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Current Report on Form 8‑K, filed on August 19, 2008) (Commission File No. 1-12744)**
10.20	Amended and Restated Martin Marietta Materials, Inc. Common Stock Purchase Plan for Directors (incorporated by reference to Exhibit 10.05 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2013) (Commission File No. 1-12744)**
10.21	Martin Marietta Materials, Inc. Amended and Restated Executive Incentive Plan (incorporated by reference to Exhibit 10.05 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2008) (Commission File No. 1-12744)**
10.22	Martin Marietta Materials, Inc. Incentive Stock Plan, as Amended (incorporated by reference to Exhibit 10.06 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2008) (Commission File No. 1-12744)**
10.23	Martin Marietta Amended and Restated Stock-Based Award Plan last amended and restated February 18, 2016 (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Quarterly Report on Form 10‑Q for the quarter ended June 30, 2016) (Commission File No. 1-12744)**
10.24	Martin Marietta Executive Cash Incentive Plan adopted February 18, 2016 (incorporated by reference to Exhibit 10.02 to the Martin Marietta Materials, Inc. Quarterly Report on Form 10‑Q for the quarter ended June 30, 2016) (Commission File No. 1-12744)**
10.25	Martin Marietta Materials, Inc. Amended Omnibus Securities Award Plan (incorporated by reference to Exhibit 10.16 to the Martin Marietta Materials, Inc. Annual Report on Form 10‑K for the fiscal year ended December 31, 2000) (Commission File No. 1-12744)**
10.26	Martin Marietta Materials, Inc. Third Amended and Restated Supplemental Excess Retirement Plan (incorporated by reference to Exhibit 10 to the Martin Marietta Materials, Inc. Quarterly Report on Form 10-Q for the quarter ended June 30, 2012) (Commission File No. 1-12744)**
10.27	Form of Option Award Agreement under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan (incorporated by reference to Exhibit 10.11 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2008) (Commission File No. 1-12744)**
10.28	Form of Amendment to the Stock Unit Agreement under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan (incorporated by reference to Exhibit 10.13 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2008) (Commission File No. 1-12744)**
10.29	Form of Restricted Stock Unit Agreement for Directors under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan (incorporated by reference to Exhibit 10.14 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2013) (Commission File No. 1-12744)**
10.30	Form of Special Restricted Stock Unit Agreement under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan (incorporated by reference to Exhibit 10.19 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2014) (Commission File No. 1-12744)**
10.31	Form of Performance-Based Restricted Stock Unit Award Agreement under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan (incorporated by reference to Exhibit 10.02 to the Martin Marietta Materials, Inc. Quarterly Report on Form 10-Q for the quarter ended March 31, 2017) (Commission File No. 1-12744)**

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Exhibit No.
10.32	Offer Letter, dated as of June 9, 2017, by and between Martin Marietta Materials, Inc. and James A. J. Nickolas (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Quarterly Report on Form 10‑Q for the quarter ended June 30, 2018) (Commission File No. 1-12744)**
10.33	Form of First Amendment to the Martin Marietta Materials, Inc. Third Amended and Restated Employment Protection Agreement (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc. Current Report on Form 8‑K, filed on December 18, 2018) (Commission File No. 1-12744)**
10.34	Form of Restricted Stock Unit Award Agreement under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan (incorporated by reference to Exhibit 10.2 to the Martin Marietta Materials, Inc. Current Report on Form 8‑K, filed on December 18, 2018) (Commission File No. 1-12744)**
10.35	Form of Performance Share Unit Award Agreement under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan (incorporated by reference to Exhibit 10.3 to the Martin Marietta Materials, Inc. Current Report on Form 8‑K, filed on December 18, 2018) (Commission File No. 1-12744)**
10.36	Form of Directors’ Restricted Stock Unit Award Agreement under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan (incorporated by reference to Exhibit 10.27 to the Martin Marietta Materials, Inc. Annual Report on Form 10-K for the fiscal year ended December 31, 2018) (Commission File No. 1-12744)**
10.37	Martin Marietta Nonqualified Deferred Cash Compensation Plan (incorporated by reference to Exhibit 10.1 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on June 29, 2020 (Commission File No. 1-12744))**
10.38	Martin Marietta Nonqualified Deferred Cash Compensation Plan Adoption Agreement (incorporated by reference to Exhibit 10.2 to the Martin Marietta Materials, Inc. Current Report on Form 8-K, filed on June 29, 2020 (Commission File No. 1-12744))**
10.39	Offer Letter, dated as of January 11, 2019, by and between Martin Marietta Materials, Inc. and Robert J. Cardin (incorporated by reference to Exhibit 10.01 to the Martin Marietta Materials, Inc. Quarterly Report on Form 10‑Q for the quarter ended June 30, 2019) (Commission File No. 1-12744)**
*19.01	Martin Marietta Insider Trading Policy
*21.01	List of subsidiaries of Martin Marietta Materials, Inc.
*23.01	Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm for Martin Marietta Materials, Inc. and consolidated subsidiaries
*24.01	Powers of Attorney (included in this Form 10-K immediately following Signatures)
*31.01	Certification dated February 21, 2025 of Chief Executive Officer pursuant to Securities and Exchange Act of 1934, rule 13a‑14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
*31.02	Certification dated February 21, 2025 of Chief Financial Officer pursuant to Securities and Exchange Act of 1934, rule 13a‑14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
*32.01	Certification dated February 21, 2025 of Chief Executive Officer required by 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
*32.02	Certification dated February 21, 2025 of Chief Financial Officer required by 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
*95	Mine Safety Disclosure Exhibit
97	Executive Clawback Policy (incorporated by reference to Exhibit 97 to the Martin Marietta Materials, Inc. Annual Report on Form 10‑K for the fiscal year ended December 31, 2023) (Commission File No. 1-12744)**
*101	The following financial information formatted in Inline XBRL:
*101.INS	Inline XBRL Instance Document – The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
*101.SCH	Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents
*104	The cover page financial information formatted in Inline XBRL (included as Exhibit 101).

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Other material incorporated by reference:

Martin Marietta Materials, Inc.’s 2025 Proxy Statement to be filed pursuant to Regulation 14A, portions of which are incorporated by reference in this Form 10-K. Those portions of the 2025 Proxy Statement which are not incorporated by reference shall not be deemed to be “filed” as part of this report.

* Filed herewith

** Management contract or compensatory plan or arrangement required to be filed as an exhibit pursuant to Item 14(c) of Form 10-K

(c) Financial Statement Schedule

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

Col A		Col B				Col C									Col D					Col E
						Additions
Description		Balance at beginning of period				(1) Charged to costs and expenses				(2) Charged to other accounts- describe					Deductions- describe					Balance at end of period
		(Amounts in Millions)
Year ended December 31, 2024
Allowance for estimated credit losses		$	12			$	—			$	—				$	4		(a)		$	8
Year ended December 31, 2023
Allowance for estimated credit losses		$	11			$	1			$	—				$	—				$	12
Year ended December 31, 2022
Allowance for estimated credit losses		$	6			$	5			$	—				$	—				$	11

ITEM 16 – FORM 10-K SUMMARY

The Company has chosen not to include an optional summary of the information required by this Form 10-K. For a reference to the information in this Form 10-K, investors should refer to the Table of Contents to this Form 10-K.

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SIGNA TURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

MARTIN MARIETTA MATERIALS, INC.
By:		/s/ Bradley D. Kohn
		Bradley D. Kohn
		Senior Vice President, General Counsel and Corporate Secretary

Dated: February 21, 2025

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below appoints each of Bradley D. Kohn and Sara W. Brown as his or her true and lawful attorney-in-fact, each with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact, full power and authority to do and perform each in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact, or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities and Exchange Act of 1934, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated:

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Signature		Title		Date
/s/ C. Howard Nye		Chair of the Board,		February 21, 2025
C. Howard Nye		President and Chief Executive Officer
/s/ James A. J. Nickolas		Executive Vice President		February 21, 2025
James A. J. Nickolas		and Chief Financial Officer
/s/ Robert J. Cardin		Senior Vice President,		February 21, 2025
Robert J. Cardin		Controller and Chief Accounting Officer
/s/ Dorothy M. Ables		Director		February 21, 2025
Dorothy M. Ables
/s/ Sue W. Cole		Director		February 21, 2025
Sue W. Cole
/s/ Anthony R. Foxx		Director		February 21, 2025
Anthony R. Foxx
/s/ John J. Koraleski		Director		February 21, 2025
John J. Koraleski
/s/ Mary T. Mack		Director		February 21, 2025
Mary T. Mack
/s/ Laree E. Perez		Director		February 21, 2025
Laree E. Perez
/s/ Thomas H. Pike		Director		February 21, 2025
Thomas H. Pike
/s/ Donald W. Slager		Director		February 21, 2025
Donald W. Slager
/s/ David C. Wajsgras		Director		February 21, 2025
David C. Wajsgras

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