SKY 10-K Fiscal year ended May 31, 2013

Table of Contents

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended May 31, 2013

or

For the transition period from                  to

Commission file number: 1-4714

SKYLINE CORPORATION

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code:

(574) 294-6521

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

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 þ

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

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 þ No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes þ No ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or an amendment to this Form 10-K. ¨

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

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

The aggregate market value of the common stock held by non-affiliates of the registrant (6,853,780 shares) based on the closing price on the New York Stock Exchange on November 30, 2012 was $28,100,498.

Indicate the number of shares outstanding of each of the registrant’s classes of common stock, as of the latest practicable date.

DOCUMENTS INCORPORATED BY REFERENCE

Table of Contents

FORM 10-K

DOCUMENTS INCORPORATED BY REFERENCE

Certain information required to be included in Part III of this Form 10-K is also included in the registrant’s Proxy Statement used in connection with its 2013 Annual Meeting of Shareholders to be held on September 23, 2013 (“2013 Proxy Statement”).

TABLE OF CONTENTS

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General Development of Business

Skyline Corporation was originally incorporated in Indiana in 1959, as successor to a business founded in 1951. Skyline Corporation and its consolidated subsidiaries (the “Corporation”) designs, produces and markets manufactured housing, modular housing and recreational vehicles (travel trailers, fifth wheels and park models) to independent dealers and manufactured housing communities located throughout the United States and Canada. Manufactured housing represents homes built according to a national building code; modular housing represents homes built to a local building code.

The Corporation, which is one of the largest producers of manufactured and modular housing in the United States, sold 1,851 manufactured homes and 370 modular homes in fiscal 2013.

The Corporation’s housing products are marketed under a number of trademarks. They are available in lengths ranging from 30’ to 76’ and in singlewide widths from 12’ to 16’, doublewide widths from 18’ to 32’, and triplewide widths from 36’ to 46’. The area of a singlewide ranges from approximately 400 to 1,200 square feet, a doublewide from approximately 700 to 2,400 square feet, and a triplewide from approximately 1,600 to 2,900 square feet.

The Corporation also sold 4,336 recreational vehicles in fiscal 2013, which are sold under a number of trademarks for travel trailers, fifth wheels and park models.

Financial Information about Segments

Net sales, operating results and total assets for the housing and recreational vehicle segments are included in Note 15, Industry Segment Information, in the Notes to Consolidated Financial Statements included in this document under Item 8.

Narrative Description of Business

Principal Products and Markets

The Corporation’s homes are marketed under a number of trademarks, and are available in a variety of dimensions. Manufactured housing models are built according to standards established by the U.S. Department of Housing and Urban Development. Modular homes are built according to state, provincial or local building codes. Each home typically includes two to four bedrooms, kitchen, dining area, living room, one or two bathrooms, kitchen appliances, central heating and cooling. Custom options may include but are not limited to: exterior dormers and windows; interior or exterior accent columns; fireplaces and whirlpool tubs. Materials used to construct a manufactured or a modular home are similar to those used in site-built housing. The Corporation also sells homes that are “Energy-Star” compliant.

The Corporation’s recreational vehicles include travel trailers, fifth wheels and park models. Travel trailers and fifth wheels are marketed under the following trademarks: “Aljo”; “AlumaSky”; “Koala”; “Layton”; “Mountain View”; “Nomad”; “Skycat”; “Texan”; “Wagoneer”; “Walkabout”; and “Weekender”. Park models are marketed under the following trademarks: “Cabin Series”; “Cedar Cove”; “Kensington”; “Shore Park Homes”; “Stone Harbor”; and “Vacation Villa”. The Corporation’s recreational vehicles are intended to provide temporary living accommodations for individuals seeking leisure travel and outdoor recreation. A recreational vehicle typically includes sleeping, kitchen, dining and bath areas.

The principal markets for manufactured and modular housing are the suburban and rural areas of the continental United States and Canada. The principal buyers continue to be individuals over the age of fifty, but the market tends to broaden when conventional housing becomes more difficult to purchase and finance.

The recreational vehicle market is made up of primarily vacationing families, traveling retired couples and sports enthusiasts pursuing four-season hobbies.

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Principal Products and Markets — (Continued)

The Corporation provides the retail purchaser of its homes with a full fifteen-month warranty against defects in design, materials and workmanship. Recreational vehicles are covered by a one-year warranty. The warranties are backed by service departments located at the Corporation’s manufacturing facilities and an extensive field service system.

The amount and percentage of net sales contributed by the housing and recreational vehicle segments is noted in Items 7 and 8.

Method of Distribution

The Corporation’s homes are distributed by approximately 190 independent dealers at 310 locations throughout the United States and Canada, and recreational vehicles are distributed by approximately 200 independent dealers at 430 locations throughout the United States and Canada. These are generally not exclusive dealerships and it is believed that most dealers also sell products of other manufacturers.

The Corporation’s products are sold to dealers either through floor plan financing with various financial institutions or on a cash basis. Payments to the Corporation are made either directly by the dealer or by financial institutions, which have agreed to finance dealer purchases of the Corporation’s products. In accordance with industry practice, certain financial institutions which finance dealer purchases require the Corporation to execute repurchase agreements in which the Corporation agrees, that in the event a dealer defaults on its repayment of the financing, the Corporation will repurchase its products from the financial institution in accordance with a declining repurchase price schedule agreed to by the financial institution and the Corporation. Any loss under these agreements is the difference between the repurchase cost and the resale value of the units repurchased. Further, the risk of loss is spread over numerous dealers.

The Corporation had no losses related to repurchases in fiscal years 2013 and 2012. Additional information regarding these repurchase agreements is included in Note 11, Commitments and Contingencies, in the Notes to Consolidated Financial Statements included in this document under Item 8.

Raw Materials and Supplies

The Corporation is basically an assembler and installer of components purchased from outside sources. The major components used by the Corporation are electrical components, lumber, plywood, shingles, vinyl and wood siding, steel, aluminum, insulation, home appliances, furnaces, plumbing fixtures, hardware, floor coverings and furniture. The suppliers are many and range in size from large national companies to very small local companies. At the present time the Corporation is obtaining sufficient materials to fulfill its needs.

Patents, Trademarks, Licenses, Franchises and Concessions

The Corporation does not rely upon any terminable or nonrenewable rights such as patents, licenses or franchises under the trademarks or patents of others, in the conduct of either segment of its business.

Seasonal Fluctuations

While the Corporation maintains production of homes and recreational vehicles throughout the year, seasonal fluctuations in sales do occur. Sales and production of homes are affected by winter weather conditions at the Corporation’s northern plants. Recreational vehicle sales are generally higher in the spring and summer months than in the fall and winter months.

Inventory

The Corporation does not maintain significant inventories of either raw materials or finished goods. In addition, there are no inventories sold on consignment.

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Dependence Upon Individual Customers

The Corporation does not rely upon any single dealer for a significant percentage of its business in any industry segment.

Backlog

The Corporation does not consider the existence and extent of backlog to be significant in its business. The Corporation’s production is based on a relatively short manufacturing cycle and dealers’ orders, which continuously fluctuate. As such, the existence of backlog is insignificant at any given date and does not typically provide a reliable indication of the status of the Corporation’s business.

Government Contracts

The Corporation has had no government contracts during the past two years.

Competitive Conditions

The industries in which the Corporation operates are highly competitive, with particular emphasis on price and features offered. The Corporation’s competitors are numerous, ranging from multi-billion dollar corporations to relatively small and specialized manufacturers. In addition, the housing segment also competes with companies that provide other forms of housing, such as new and existing site-built homes, apartments, condominiums and townhouses.

The following tables show the Corporation’s competitive position on a calendar and fiscal year basis in the product lines it sells.

The competitive position for park models and Canadian modular housing is not listed because industry data is not available.

The competitive position for modular housing is not listed because industry data is not available.

Both the housing and recreational vehicle segments of the Corporation’s business are dependent upon the availability of wholesale and retail financing. Consequently, increases in interest rates and the availability of credit through governmental action or otherwise, have adversely affected the Corporation’s business in the past and may do so in the future.

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Regulation

The manufacture, distribution and sale of manufactured housing, modular housing and recreational vehicles are subject to government regulations in both the United States and Canada, at federal, state or provincial and local levels.

Environmental Quality

The Corporation believes that compliance with federal, state and local requirements with respect to environmental quality will not require any material capital expenditures for plant or equipment modifications which would adversely affect earnings.

Other Regulations

The U.S. Department of Housing and Urban Development (HUD) has set national manufactured home construction and safety standards and implemented recall and other regulations since 1976. The National Manufactured Housing Construction and Safety Standards Act of 1974, as amended, under which such standards and regulations are promulgated, prohibits states from establishing or continuing in effect any manufactured home standard that is not identical to the federal standards as to any covered aspect of performance. Implementation of these standards and regulations involves inspection agency approval of manufactured home designs, plant and home inspection by states or other HUD-approved third parties, manufacturer certification that the standards are met, and possible recalls if they are not or if homes contain safety hazards.

HUD has promulgated rules requiring producers of manufactured homes to utilize wood products certified by their suppliers to meet HUD’s established limits on formaldehyde emissions, and to place in each home written notice to prospective purchasers of possible adverse reaction from airborne formaldehyde in the homes. These rules are designated as preemptive of state regulation. Some components of manufactured and modular housing may also be subject to Consumer Product Safety Commission standards and recall requirements.

Regarding recreational vehicles, the Corporation has voluntarily subjected itself to third party inspection of all of its recreational vehicle products nationwide in order to further assure the Corporation, its dealers, and customers of compliance with established standards.

Manufactured housing, modular housing and recreational vehicles may be subject to the Magnuson-Moss Warranty — Federal Trade Commission Improvement Act, which regulates warranties on consumer products.

The Corporation’s travel trailers continue to be subject to safety standards and recall and other regulations promulgated by the U.S. Department of Transportation under the National Traffic and Motor Vehicle Safety Act of 1966 and the Transportation Recall Enhancement, Accountability and Documentation (TREAD) Act, as well as state laws and regulations.

The Corporation’s operations are subject to the Federal Occupational Safety and Health Act, and are routinely inspected thereunder.

The transportation and placement (in the case of manufactured and modular housing) of the Corporation’s products are subject to state highway use regulations and local ordinances which control the size of units that may be transported, the roads to be used, speed limits, hours of travel, and allowable locations for manufactured homes and communities.

The Corporation is also subject to many state manufacturer licensing and bonding requirements, and to dealer day in court requirements in some states.

The Corporation believes that it is currently in compliance with the above regulations.

Number of Employees

The Corporation employs approximately 1,100 people at the present time.

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Executive Officers of the Corporation

Information regarding the Corporation’s executive officers is located in this document under Part III, Item 10.

Available Information

The Corporation makes available, free of charge, through the Investors section of its internet website its annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, Proxy Statements and all amendments to those reports as soon as practicable after such material is electronically filed or furnished to the United States Securities and Exchange Commission (SEC). The Corporation’s internet site is http://www.skylinecorp.com. A copy of the Corporation’s annual report on Form 10-K will be provided without charge upon written request to Skyline Corporation, Investor Relations Department, Post Office Box 743, Elkhart, Indiana 46515.

The public may read and copy any materials the Corporation has filed with the SEC at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549. The public may also obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC maintains an internet website (http://www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

Investors or potential investors should carefully consider the risks described below. Additional risks of which the Corporation is presently unaware or that the Corporation considers immaterial may also impair business operations and hinder financial performance.

Retail Financing Availability

Customers who purchase the Corporation’s products generally obtain retail financing from third party lenders. The availability, terms and cost of retail financing depend on the lending practices of financial institutions, governmental policies and economic and other conditions, all of which are beyond the Corporation’s control. A customer seeking to purchase a manufactured home without land will generally pay a higher interest rate and have a shorter loan maturity versus a customer financing the purchase of land and a home. This difference is due to most states classifying home-only manufactured housing loans as personal property rather than real property for purposes of taxation and lien perfection.

In recent years, many lenders of home-only financing have tightened credit underwriting standards, with some deciding to exit the industry. These actions resulted in decreased availability of retail financing, causing a negative effect on sales and operating results. If retail financing were to be further curtailed, net sales, operating results and cash flows could be adversely affected.

Wholesale Financing Availability

Independent dealers of the Corporation’s products generally finance their inventory purchases with wholesale floor plan financing provided by lending institutions. A dealer’s ability to obtain financing is significantly affected by the number of lending institutions offering floor planning, and by an institution’s lending limits. In recent years, the industries in which the Corporation operates experienced a reduction in both the number of lenders offering floor planning and the amount of money available for financing. These events could have a negative impact on a dealer’s ability to purchase manufactured housing, modular housing and recreational vehicle products, resulting in lower net sales, operating results and cash flows.

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Dependence on Independent Dealers

The Corporation sells its manufactured homes, modular homes and recreational vehicles to independent dealers. These dealers are not obligated to exclusively sell the Corporation’s products, and may choose to sell competitor’s products. In addition, a dealer may become financially insolvent and be forced to close its business. Both scenarios could have an adverse effect on net sales, operating results and cash flows.

Dealer Inventories

As wholesale shipments of manufactured homes, modular homes and recreational vehicles exceed retail sales, dealer inventories increase to a level where dealers decrease orders from manufacturers. As manufacturers respond to reduced demand, many either offer discounts to maintain production volumes or curtail production levels. Both outcomes could have a negative impact on net sales, operating results and cash flows.

Contingent Repurchase Agreements

As referenced in Note 11 to the Notes to the Consolidated Financial Statements in Item 8, the Corporation is contingently liable under repurchase agreements with certain financial institutions providing inventory financing for retailers of its products. The Corporation could be required to fulfill some or all of the repurchase agreements, resulting in increased expense and reduced cash flows.

Cost and Availability of Raw Materials

Prices and availability of raw materials used to manufacture the Corporation’s products can change significantly due to fluctuations in supply and demand. In addition, the cost of raw materials is also influenced by transportation costs. The Corporation has historically been able to have an adequate supply of raw materials by maintaining good relations with its vendors. Increased prices have historically been passed on to dealers by raising the price of manufactured housing, modular housing and recreational vehicles. There is no certainty that the Corporation will be able to pass on future price increases and maintain an adequate supply of raw materials. The inability to raise the price of its products and to maintain a proper supply of materials could have a negative impact on net sales, operating results and cash flows.

Competition

As noted in Item 1, the manufactured housing, modular housing and recreational vehicle industries are highly competitive with particular emphasis on price and features offered. Some of the Corporation’s competitors are vertically integrated by owning retail, consumer finance and insurance operations. This integration may provide competitors with an advantage. In addition, the Corporation’s housing products compete with other forms of housing, such as new and existing site-built homes, apartments, condominiums and townhouses. The inability to effectively compete in this environment could result in lower net sales, operating results and cash flows.

Cyclical and Seasonal Nature of Business

The industries in which the Corporation operates are highly cyclical, and are impacted by but not limited to the following conditions:

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Cyclical and Seasonal Nature of Business — (Continued)

Sales of manufactured housing, modular housing and recreational vehicle industries are also seasonal in nature with sales being lowest in the winter months. Seasonal changes, in addition to weakness in demand in one or both of the Corporation’s market segments, could materially impact the Corporation’s net sales, operating results and cash flows.

Changing Consumer Preferences

Changes in consumer preferences for manufactured housing, modular housing and recreational vehicles occur over time, and consequently the Corporation responds to changing demand by evaluating the market acceptability of its products. Delays in responding to changing consumer preferences could have an adverse effect on net sales, operating results and cash flows.

Increased Fuel Prices

The Corporation’s recreational vehicle products depend on the use of vehicles that operate on gasoline or diesel fuel. In the Corporation’s history there have been periods where the price of gasoline and diesel fuel dramatically increased. These increases resulted in greater cost associated with recreational vehicle travel. This trend could result in decreased net sales, operating results and cash flows.

Governmental Regulations

As noted in Item 1, the Corporation is subject to various governmental regulations. Implementation of new regulations or amendments to existing regulations could significantly increase the cost of the Corporation’s products. In addition, failure to comply with present or future regulations could result in fines or potential civil or criminal liability. Both scenarios could negatively impact net sales, operating results and cash flows.

Dependence on Executive Officers and Other Key Personnel

The Corporation depends on the efforts of its executive officers and certain key employees. The loss of the service of one or more of these individuals could have an adverse effect on net sales, operating results and cash flows of the Corporation.

Incurrence of Net Losses

Due to negative economic conditions that impacted the manufactured housing, modular housing and recreational vehicle industries, the Corporation incurred net losses from fiscal year 2008 to 2013. While the Corporation’s management is pursuing strategies as referenced in Item 7 to increase sales and decrease costs, no one can predict with certainty what the future may hold. Continued losses could negatively affect the Corporation’s liquidity.

None

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The Corporation’s 11 operating manufacturing facilities, 4 idle facilities and 3 corporate facilities, all of which are owned, are as follows:

In addition, the Corporation owns undeveloped land in Elkhart, Indiana and McMinnville, Oregon. In the second quarter of fiscal 2013, two idle recreational vehicle facilities located in Hemet, California were sold for a gain of $1,411,000. In the fourth quarter of fiscal 2013, an idle manufactured housing facility located in Mocksville, North Carolina was sold for a gain of $230,000. In the second quarter of fiscal 2012, one idle housing facility located in Ocala, Florida and one located in Ephrata, Pennsylvania were sold for gains of $1,114,000 and $1,386,000, respectively.

It is extremely difficult to determine the unit productive capacity of the Corporation because of the ever-changing product mix. The Corporation believes that its plant facilities, machinery and equipment are well maintained and are in good operating condition.

The Corporation is a party to various pending legal proceedings in the normal course of business. Management believes that any losses resulting from such proceedings would not have a material adverse effect on the Corporation’s results of operations or financial position.

Not applicable.

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Skyline Corporation (SKY) is traded on the New York Stock Exchange. At May 31, 2013, there were 746 shareholders of record of Skyline Corporation common stock. A quarterly summary of the market price and dividends declared per share are listed for the fiscal years ended May 31, 2013 and 2012. In the third quarter of fiscal 2012, the Board of Directors approved a resolution to suspend dividend payments on the outstanding shares of the Corporation’s common stock until further notice. The suspension was for cash preservation purposes. The Board will evaluate financial performance and liquidity needs in determining the timing and amount of future dividend payments.

The name, address and phone number of the Corporation’s stock transfer agent and registrar is:

Computershare Trust Company, N.A.

P. O. Box 43078

Providence, RI 02940

(312) 588-4237

Not applicable.

Overview

The Corporation designs, produces and markets manufactured housing, modular housing and recreational vehicles (travel trailers, fifth wheels and park models) to independent dealers and manufactured housing communities located throughout the United States and Canada. To better serve the needs of its dealers and communities, the Corporation has eleven manufacturing facilities in nine states. Manufactured housing, modular housing and recreational vehicles are sold to dealers and communities either through floor plan financing with various financial institutions or on a cash basis. While the Corporation maintains production of manufactured housing, modular homes and recreational vehicles throughout the year, seasonal fluctuations in sales do occur. Sales and production of manufactured housing and modular housing are affected by winter weather conditions at the Corporation’s northern plants. Recreational vehicle sales are generally higher in the spring and summer months than in the fall and winter months.

As referenced in Item 1, manufactured and modular housing are marketed under a number of trademarks, and are available in a variety of dimensions. Manufactured housing products are built according to standards established by the U.S. Department of Housing and Urban Development. Modular homes are built according to state, provincial or local building codes. Recreational vehicles include travel trailers, fifth wheels and park models. Travel trailers and fifth wheels are marketed under the following trademarks: “Aljo”; “AlumaSky”; “Koala”; “Layton”; “Mountain View”; “Nomad”; “Skycat”; “Texan”; “Wagoneer”; “Walkabout”; and “Weekender”. Park models are marketed under the following trademarks: “Cabin Series”; “Cedar Cove”; “Kensington”; “Shore Park Homes”; “Stone Harbor”; and “Vacation Villa”. The Corporation’s recreational vehicles are intended to provide temporary living accommodations for individuals seeking leisure travel and outdoor recreation.

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Manufactured Housing, Modular Housing and Recreational Vehicle Industry Conditions

Sales of manufactured housing, modular housing and recreational vehicles are affected by the strength of the U.S. economy, interest rate and employment levels, consumer confidence and the availability of wholesale and retail financing. The manufactured housing industry has until recently been affected by declining or stagnating unit shipments. This decline or stagnation, caused primarily by adverse economic conditions, tightening retail and wholesale credit markets and a depressed site-built housing market, is resulting in historically low industry shipments. Total shipments for calendar 2012 were approximately 55,000 units, a 6 percent increase from the previous year’s total of approximately 52,000 units. In addition, total shipments from January to May 2013 were approximately 24,000 units, an approximately 5 percent increase from the same period a year ago.

Tight credit markets for retail and wholesale financing have become a significant challenge for the manufactured housing industry. According to the Manufactured Housing Institute, a lack of retail financing options and restrictive credit standards has negatively affected manufactured home buyers. In addition, a significant decline has occurred in wholesale financing, especially as national floor plan lenders have decreased lending to industry dealers.

The domestic modular housing industry has challenges similar to the manufactured housing industry, such as restrictive retail and wholesale financing, and a depressed site-built housing market. From calendar 2006 to 2012, total shipments decreased from approximately 39,000 to 13,000 units, a decline of 67 percent. Information related to the Canadian modular housing industry is not available.

Sales of recreational vehicles are influenced by changes in consumer confidence, employment levels, the availability of retail and wholesale financing and gasoline prices. Industry unit sales of travel trailers and fifth wheels have varied in recent years. From calendar 2007 to the first half of 2009 unit sales decreased as a result of recessionary conditions, decreased household wealth, tightening credit markets for retail and wholesale financing, and excess inventory of new recreational vehicles. Unit sales, however, started increasing in the last half of calendar 2009 and continue to date. The Recreational Vehicle Industry Association (RVIA) notes that continued growth in recreational vehicle shipments is due to a combination of easing credit terms and availability of loans, gains in household wealth and employment. These positive factors, however, could be negatively affected by adverse changes in federal policies and regulations in addition to adverse global economic conditions.

Fiscal 2013 Results

The Corporation experienced the following results during fiscal 2013:

The Corporation’s housing segment experienced increased net sales in fiscal 2013 as compared to fiscal 2012, and management cannot determine with certainty if this trend will continue. This uncertainty is based on continuing negative economic conditions previously referenced.

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Fiscal 2013 Results — (Continued)

The recreational vehicle segment experienced decreased net sales in fiscal 2013. Regarding the business environment for fiscal 2014, the RVIA forecasts calendar 2013 travel trailer and fifth wheel shipments of approximately 262,000 units; an 8 percent increase from calendar 2012’s total of approximately 243,000 units. In addition, the RVIA forecasts 2014 travel trailer and fifth wheel shipments of approximately 271,000 units; a 3 percent increase from 2013’s estimated total. Despite this favorable trend, business conditions for fiscal 2014 could be negatively impacted by adverse factors previously referenced by the RVIA.

Management’s Plan

Due to recent losses, the Corporation is actively pursuing strategies to increase sales and decrease costs. These strategies include but are not limited to:

By implementing these strategies, and having a significant position of its working capital in cash and U.S. Treasury Bills, the Corporation’s management believes the Corporation will have sufficient liquidity to meet its obligations through the next operating cycle.

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Results of Operations — Fiscal 2013 Compared to Fiscal 2012

Net Sales and Unit Shipments

Housing net sales increased approximately 2 percent. The increase was the outcome of the following factors:

Housing unit shipments decreased approximately 5 percent. The decrease was the outcome of the following factors:

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Results of Operations — Fiscal 2013 Compared to Fiscal 2012 — (Continued)

Net Sales and Unit Shipments — (Continued)

Total domestic manufactured housing unit shipments decreased approximately 5 percent. Industry unit shipments for these products remained relatively unchanged from fiscal 2012 to fiscal 2013. Current industry unit shipment data for modular housing is not available. Adverse conditions that caused the Corporation’s unit shipments to lag the industry include:

Compared to prior year, the average net sales price for domestic manufactured housing increased approximately 5 percent primarily due to sales price adjustments resulting from higher material costs. The average net sales price for domestic modular and Canadian modular housing products increased approximately 13 percent and 11 percent, respectively. These increases are the result of homes sold with larger square footage and greater amenities; in addition to sales price adjustments resulting from higher material costs.

Recreational vehicles net sales revenue decreased approximately 10 percent. The decrease was the outcome of the following factors:

Recreational vehicle unit shipments decreased approximately 13 percent. The decrease was the outcome of the following factors:

Unit shipments for travel trailers and fifth wheels decreased approximately 14 percent. Industry shipments for these products in fiscal 2013 as compared to fiscal 2012 increased approximately 15 percent. The Corporation’s unit shipments lagged the industry due to decreased demand from Canadian dealers. In addition, some competitors maintained larger quantities of finished goods inventory; resulting in the ability to meet dealer demand immediately. Current industry unit shipment data for park models is not available.

Compared to prior year, the average net sales price per unit for recreational vehicles sold domestically increased approximately 4 percent; primarily due to models sold with larger square footage and greater amenities.

Cost of Sales

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Results of Operations — Fiscal 2013 Compared to Fiscal 2012 — (Continued)

Cost of Sales — (Continued)

Housing cost of sales, in dollars and as a percentage of net sales, decreased due to lower manufacturing expenses and improved margins on products sold. Recreational vehicle cost of sales declined due to decreased unit shipments and lower manufacturing expenses. As a percentage of net sales, cost of sales decreased as a result of lower manufacturing expenses and improved margins on products sold.

Selling and Administrative Expenses

Selling and administrative expenses, in dollars and as a percent of net sales, decreased primarily as a result of a decline in salaries and wages due to staff reductions, performance based compensation, dealer and trade show expenses, and the closure of the Corporation’s aviation department.

Gain on Sale of Idle Property, Plant and Equipment

In the second quarter of fiscal 2013, the Corporation sold two idle recreational vehicle facilities in Hemet, California for a gain of $1,411,000. In the fourth quarter of fiscal 2013, an idle manufactured housing facility located in Mocksville, North Carolina was sold for a gain of $230,000.

In the second quarter of fiscal 2012, the Corporation sold idle housing facilities located in Ocala, Florida and Ephrata, Pennsylvania for gains of $1,114,000 and $1,386,000, respectively. In addition, the Corporation sold its aircraft in the fourth quarter of fiscal 2012 for a gain of $684,000.

Loss Before Income Taxes

The operating loss for the housing segment decreased due to increased net sales, improved margins on products sold, and decreased manufacturing, selling and administrative expenses.

Recreational vehicle operating loss decreased primarily due to improved margins on products sold, and decreased manufacturing, selling and administrative expenses.

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Results of Operations — Fiscal 2013 Compared to Fiscal 2012 — (Continued)

Loss Before Income Taxes — (Continued)

General corporate expenses decreased primarily as a result of the closure of the Corporation’s aviation department.

Interest income for fiscal 2013 consisted of $55,000 from the Corporation’s note receivable and $9,000 from investment in U.S Treasury Bills. Interest income for fiscal 2012 consisted of $17,000 from investment in U.S. Treasury Bills.

Liquidity and Capital Resources

The Corporation’s policy is to invest its excess cash, which exceeds its operating needs, in U.S. Government Securities. Cash and U.S. Treasury Bills decreased primarily due to a net loss of $10,513,000. Current assets, exclusive of cash and U.S. Treasury Bills, increased mainly due to a $2,273,000 increase in accounts receivable and a $373,000 increase in inventories. Accounts receivable increased mainly due to money owed from Stewart Homes, Inc. for the purchase of homes as referenced in Note 2, Restricted Cash, in the Notes to Consolidated Financial Statements included in this document under Item 8. Inventories increased primarily as a result of greater production occurring at May 31, 2013 as compared to May 31, 2012.

Current liabilities decreased primarily as a result of a $366,000 decrease in accrued salaries and wages. This decrease is due to the timing of payments to employees at May 31, 2013 as compared to May 31, 2012.

Capital expenditures totaled $75,000 for fiscal 2013 as compared to $614,000 for fiscal 2012. Capital expenditures were made primarily to replace or refurbish machinery and equipment.

The Corporation’s current cash and other short-term investments are expected to be adequate to fund operating cash needs in addition to any capital expenditures for the upcoming fiscal year. Although the Corporation has experienced decreased liquidity, its financing needs have been met with a combination of cash on hand and funds generated through the sale of assets. In addition, various strategies are being pursued to improve financial performance. These strategies are referenced in the “Fiscal 2013” section of Item 7.

Critical Accounting Policies

The preparation of financial statements in conformity with generally accepted accounting principles requires the Corporation to make certain estimates that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures. Estimates are periodically evaluated using historical experience and various other factors believed to be reasonable under the circumstances. Actual results could differ from these estimates under different assumptions or conditions. The following accounting policies are considered to require a significant estimate:

Deferred Tax Assets

Net deferred tax assets and liabilities are computed based on the difference between the financial statement and income tax bases of assets and liabilities using the enacted tax rates.

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Critical Accounting Policies  — (Continued)

Deferred Tax Assets — (Continued)

The Corporation has a full valuation allowance against its deferred tax assets. In addition, net deferred tax assets consist of federal net operating loss and tax credit carryfowards, state net operating loss carryfowards and temporary differences between financial and tax reporting. Additional information regarding the increase in the valuation allowance is referenced in Note 10 of the Notes to Consolidated Financial Statements.

Revenue Recognition

The Corporation’s accounting for revenue recognition is referenced in Note 1 of the Notes to Consolidated Financial Statements.

Product Warranties

As referenced in Note 1 of the Notes to Consolidated Financial Statements, homes are sold with a fifteen-month warranty and recreational vehicles are sold with a one-year warranty. Estimated warranty costs are accrued at the time of sale based upon sales, historical claims experience and management’s judgment regarding anticipated rates of warranty claims. Significant changes in these factors could have a material impact on future results of operations.

Newly Issued Accounting Standards

The effect of newly issued accounting standards on the Corporation is addressed in Note 1 of the Notes to Consolidated Financial Statements.

Impact of Inflation

The consolidated financial statements included in this report reflect transactions in the dollar values in which they were incurred and, therefore, do not attempt to measure the impact of inflation. On a long-term basis, the Corporation has adjusted selling prices in reaction to changing costs due to inflation.

Forward Looking Information

Certain statements in this report are considered forward looking as indicated by the Private Securities Litigation Reform Act of 1995. These statements involve uncertainties that may cause actual results to materially differ from expectations as of the report date. These uncertainties include but are not limited to:

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Forward Looking Information — (Continued)

Not applicable.

Index to Consolidated Financial Statements

All other supplementary data is omitted because it is not applicable or the required information is shown in the financial statements or notes thereto.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors of Skyline Corporation:

We have audited the accompanying consolidated balance sheets of Skyline Corporation and subsidiary companies (the “Corporation”) as of May 31, 2013 and 2012, and the related consolidated statements of operations and retained earnings, and cash flows for the years then ended. These financial statements are the responsibility of the Corporation’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Corporation is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Corporation’s internal control over financial reporting. Accordingly, we express no such opinion. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Corporation as of May 31, 2013 and 2012, and the results of its operations and its cash flows for the years then ended, in conformity with U.S. generally accepted accounting principles.

Crowe Horwath LLP

Fort Wayne, Indiana

July 26, 2013

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Skyline Corporation and Subsidiary Companies

May 31, 2013 and 2012

(Dollars in thousands)

The accompanying notes are an integral part of the consolidated financial statements.

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Skyline Corporation and Subsidiary Companies

Consolidated Balance Sheets — (Continued)

May 31, 2013 and 2012

(Dollars in thousands, except share and per share amounts)