BIIB 10-Q Quarterly Report March 31, 2017

BIOGEN INC.

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10-Q 1 biib-2017331x10q.htm 10-Q Document

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q



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

For the quarterly period ended March 31, 2017



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

Commission File Number 0-19311

BIOGEN INC.

(Exact name of registrant as specified in its charter)



Delaware		33-0112644
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

225 Binney Street, Cambridge, MA 02142

(617) 679-2000

(Address, including zip code, and telephone number, including

area code, of registrant’s principal executive offices)

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 x No o

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 during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files): Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an 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 (Check One):



Large accelerated filer x		Accelerated filer o
Non-accelerated filer o		Smaller reporting company o
(Do not check if a smaller reporting company)		Emerging growth company o

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. o

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

The number of shares of the issuer’s Common Stock, $0.0005 par value, outstanding as of April 21, 2017 was 212,115,203 shares.

Table of Contents

BIOGEN INC.

FORM 10-Q — Quarterly Report

For the Quarterly Period Ended March 31, 2017

TABLE OF CONTENTS



		Page
PART I — FINANCIAL INFORMATION

Item 1.	Financial Statements (unaudited)

	Condensed Consolidated Statements of Income — For the Three Months Ended March 31, 2017 and 2016	5

	Condensed Consolidated Statements of Comprehensive Income — For the Three Months Ended March 31, 2017 and 2016	6

	Condensed Consolidated Balance Sheets — As of March 31, 2017 and December 31, 2016	7

	Condensed Consolidated Statements of Cash Flows — For the Three Months Ended March 31, 2017 and 2016	8

	Notes to Condensed Consolidated Financial Statements	9

Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	33

Item 3.	Quantitative and Qualitative Disclosures About Market Risk	53

Item 4.	Controls and Procedures	55

PART II — OTHER INFORMATION

Item 1.	Legal Proceedings	56

Item 1A.	Risk Factors	56

Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	70

Item 6.	Exhibits	70

Signatures		71

Table of Contents

NOTE REGARDING FORWARD-LOOKING STATEMENTS

This report contains forward-looking statements that are being made pursuant to the provisions of the Private Securities Litigation Reform Act of 1995 (the Act) with the intention of obtaining the benefits of the “Safe Harbor” provisions of the Act. These forward-looking statements may be accompanied by such words as “anticipate,” “believe,” “could,” “estimate,” “expect,” “forecast,” “intend,” “may,” “plan,” “potential,” “possible,” “will” and other words and terms of similar meaning. Reference is made in particular to forward-looking statements regarding:

•

the anticipated amount, timing and accounting of revenues, contingent payments, milestone, royalty and other payments under licensing, collaboration or acquisition agreements, tax positions and contingencies, collectability of receivables, pre-approval inventory, cost of sales, research and development costs, compensation and other selling, general and administrative expenses, amortization of intangible assets, foreign currency exchange risk, estimated fair value of assets and liabilities and impairment assessments;


•	expectations, plans and prospects relating to sales, pricing, growth and launch of our marketed and pipeline products;


•	the potential impact of increased product competition in the markets in which we compete;


•	the anticipated benefits, costs and tax treatment of the spin-off of our hemophilia business;


•	patent terms, patent term extensions, patent office actions and expected availability and period of regulatory exclusivity;


•	the costs and timing of potential clinical trials, filing and approvals, and the potential therapeutic scope of the development and commercialization of our and our collaborators’ pipeline products;


•	the drivers for growing our business, including our plans and intent to commit resources relating to business development opportunities and research and development programs;


•	our manufacturing capacity, use of third-party contract manufacturing organizations and plans and timing relating to the expansion of our manufacturing capabilities, including anticipated investments and activities in new manufacturing facilities;


•	the potential impact on our results of operations and liquidity of the United Kingdom's (U.K.'s) intent to voluntarily depart from the European Union (E.U.);


•	the impact of the continued uncertainty of the credit and economic conditions in certain countries in Europe and our collection of accounts receivable in such countries;


•	the potential impact of healthcare reform in the United States (U.S.) and measures being taken worldwide designed to reduce healthcare costs to limit the overall level of government expenditures, including the impact of pricing actions and reduced reimbursement for our products;


•	the timing, outcome and impact of administrative, regulatory, legal and other proceedings related to our patents and other proprietary and intellectual property rights, tax audits, assessments and settlements, pricing matters, sales and promotional practices, product liability and other matters;


•	lease commitments, purchase obligations and the timing and satisfaction of other contractual obligations;


•	our ability to finance our operations and business initiatives and obtain funding for such activities; and


•	the impact of new laws and accounting standards.

These forward-looking statements involve risks and uncertainties, including those that are described in the “ Risk Factors ” section of this report and elsewhere in this report, that could cause actual results to differ materially from those reflected in such statements. You should not place undue reliance on these statements. Forward-looking statements speak only as of the date of this report. Except as required by law, we do not undertake any obligation to publicly update any forward-looking statements, whether as a result of new information, future developments or otherwise.

Table of Contents

NOTE REGARDING COMPANY AND PRODUCT REFERENCES

References in this report to:


•	“Biogen,” the “company,” “we,” “us” and “our” refer to Biogen Inc. and its consolidated subsidiaries;


•	“RITUXAN” refers to both RITUXAN (the trade name for rituximab in the U.S., Canada and Japan) and MabThera (the trade name for rituximab outside the U.S., Canada and Japan);


•	"ELOCTATE" refers to both ELOCTATE (the trade name for Antihemophilic Factor (Recombinant), Fc Fusion Protein in the U.S., Canada and Japan) and ELOCTA (the trade name for Antihemophilic Factor (Recombinant), Fc Fusion Protein in the E.U.).

NOTE REGARDING TRADEMARKS

AVONEX®, BENEPALI®, FLIXABI®, PLEGRIDY®, RITUXAN®, SPINRAZA®, TECFIDERA®, TYSABRI® and ZINBRYTA® are registered trademarks of Biogen. FUMADERM ^TM is a trademark of Biogen. ALPROLIX®, ELOCTATE®, ENBREL®, FAMPYRA ^TM , GAZYVA®, OCREVUS®, REMICADE® and other trademarks referenced in this report are the property of their respective owners.

Table of Contents

PART I FINANCIAL INFORMATION

BIOGEN INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(unaudited, in millions, except per share amounts)



	For the Three Months Ended March 31,
	2017			2016
Revenues:
Product, net	$	2,380.1		$	2,309.4
Revenues from anti-CD20 therapeutic programs	340.6			329.5
Other	90.0			87.9
Total revenues	2,810.7			2,726.8
Cost and expenses:
Cost of sales, excluding amortization of acquired intangible assets	384.6			313.0
Research and development	423.4			437.3
Selling, general and administrative	499.1			497.3
Amortization of acquired intangible assets	448.5			88.8
Collaboration profit (loss) sharing	20.8			—
(Gain) loss on fair value remeasurement of contingent consideration	10.0			2.3
Restructuring charges	—			9.7
Total cost and expenses	1,786.4			1,348.4
Income from operations	1,024.3			1,378.4
Other income (expense), net	(37.6		)	(52.8		)
Income before income tax expense and equity in loss of investee, net of tax	986.7			1,325.6
Income tax expense	239.2			356.4
Equity in loss of investee, net of tax	—			—
Net income	747.5			969.2
Net income (loss) attributable to noncontrolling interests, net of tax	(0.1		)	(1.7		)
Net income attributable to Biogen Inc.	$	747.6		$	970.9
Net income per share:
Basic earnings per share attributable to Biogen Inc.	$	3.47		$	4.44
Diluted earnings per share attributable to Biogen Inc.	$	3.46		$	4.43
Weighted-average shares used in calculating:
Basic earnings per share attributable to Biogen Inc.	215.6			218.9
Diluted earnings per share attributable to Biogen Inc.	215.9			219.3

See accompanying notes to these unaudited condensed consolidated financial statements.

Table of Contents

BIOGEN INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in millions)



	For the Three Months Ended March 31,
	2017			2016
Net income attributable to Biogen Inc.	$	747.6		$	970.9
Other comprehensive income:
Unrealized gains (losses) on securities available for sale, net of tax	(1.6		)	2.5
Unrealized gains (losses) on cash flow hedges, net of tax	(23.8		)	(47.6		)
Unrealized gains (losses) on pension benefit obligation, net of tax	0.1			0.2
Currency translation adjustment	20.0			9.6
Total other comprehensive income (loss), net of tax	(5.3		)	(35.3		)
Comprehensive income attributable to Biogen Inc.	742.3			935.6
Comprehensive income (loss) attributable to noncontrolling interests, net of tax	(0.1		)	(1.7		)
Comprehensive income	$	742.2		$	933.9

See accompanying notes to these unaudited condensed consolidated financial statements.

Table of Contents

BIOGEN INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited, in millions, except per share amounts)



	As of March 31, 2017			As of December 31, 2016
ASSETS
Current assets:
Cash and cash equivalents	$	924.0		$	2,326.5
Marketable securities	1,956.2			2,568.6
Accounts receivable, net	1,501.5			1,441.6
Due from anti-CD20 therapeutic programs	324.5			300.6
Inventory	921.6			1,001.6
Other current assets	1,231.9			1,093.3
Total current assets	6,859.7			8,732.2
Marketable securities	2,825.2			2,829.4
Property, plant and equipment, net	2,610.9			2,501.8
Intangible assets, net	4,103.9			3,808.3
Goodwill	3,611.7			3,669.3
Investments and other assets	1,184.5			1,335.8
Total assets	$	21,195.9		$	22,876.8
LIABILITIES AND EQUITY
Current liabilities:
Current portion of notes payable and other financing arrangements	$	561.5		$	4.7
Taxes payable	70.0			231.9
Accounts payable	316.4			279.8
Accrued expenses and other	2,044.6			2,903.5
Total current liabilities	2,992.5			3,419.9
Notes payable and other financing arrangements	5,952.7			6,512.7
Deferred tax liability	94.5			93.1
Other long-term liabilities	688.8			722.5
Total liabilities	9,728.5			10,748.2
Commitments and contingencies
Equity:
Biogen Inc. shareholders’ equity
Preferred stock, par value $0.001 per share	—			—
Common stock, par value $0.0005 per share	0.1			0.1
Additional paid-in capital	—			—
Accumulated other comprehensive loss	(325.2		)	(319.9		)
Retained earnings	14,781.2			15,071.6
Treasury stock, at cost	(2,977.1		)	(2,611.7		)
Total Biogen Inc. shareholders’ equity	11,479.0			12,140.1
Noncontrolling interests	(11.6		)	(11.5		)
Total equity	11,467.4			12,128.6
Total liabilities and equity	$	21,195.9		$	22,876.8

See accompanying notes to these unaudited condensed consolidated financial statements.

Table of Contents

BIOGEN INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in millions)



	For the Three Months Ended March 31,
	2017			2016
Cash flows from operating activities:
Net income	$	747.5		$	969.2
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	512.0			149.7
Share-based compensation	37.0			45.3
Deferred income taxes	76.1			8.9
Other	18.1			(11.9		)
Changes in operating assets and liabilities, net:
Accounts receivable	(195.7		)	(160.0		)
Inventory	(46.2		)	(88.6		)
Accrued expenses and other current liabilities	(684.2		)	(136.7		)
Income tax assets and liabilities	(195.1		)	276.8
Other changes in operating assets and liabilities, net	(34.3		)	(36.9		)
Net cash flows provided by operating activities	235.2			1,015.8
Cash flows from investing activities:
Proceeds from sales and maturities of marketable securities	1,884.3			1,181.1
Purchases of marketable securities	(1,256.7		)	(1,914.4		)
Contingent consideration related to Fumapharm AG acquisition	(300.0		)	(300.0		)
Purchases of property, plant and equipment	(210.0		)	(126.9		)
Acquisitions of intangible assets	(855.2		)	(28.6		)
Other	(6.6		)	(14.4		)
Net cash flows used in investing activities	(744.2		)	(1,203.2		)
Cash flows from financing activities:
Purchases of treasury stock	(583.6		)	—
Payments related to issuance of stock for share-based compensation arrangements, net	(25.5		)	(29.6		)
Net cash contribution to Bioverativ	(302.7		)	—
Other	10.4			24.6
Net cash flows used in financing activities	(901.4		)	(5.0		)
Net decrease in cash and cash equivalents	(1,410.4		)	(192.4		)
Effect of exchange rate changes on cash and cash equivalents	7.9			15.1
Cash and cash equivalents, beginning of the period	2,326.5			1,308.0
Cash and cash equivalents, end of the period	$	924.0		$	1,130.7

See accompanying notes to these unaudited condensed consolidated financial statements.

Table of Contents

BIOGEN INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. Summary of Significant Accounting Policies

Business Overview

Biogen is a global biopharmaceutical company focused on discovering, developing, manufacturing and delivering therapies to people living with serious neurological and neurodegenerative diseases.

Our marketed products include TECFIDERA, AVONEX, PLEGRIDY, TYSABRI, ZINBRYTA and FAMPYRA for multiple sclerosis (MS), SPINRAZA for the treatment of spinal muscular atrophy (SMA) and FUMADERM for the treatment of severe plaque psoriasis. We also have certain business and financial rights with respect to RITUXAN for the treatment of non-Hodgkin's lymphoma, chronic lymphocytic leukemia (CLL) and other conditions, GAZYVA indicated for the treatment of CLL and follicular lymphoma, OCREVUS indicated for the treatment of primary progressive MS (PPMS) and relapsing MS (RMS), and other potential anti-CD20 therapies under a collaboration agreement with Genentech, Inc. (Genentech), a wholly-owned member of the Roche Group.

We support our drug discovery and development efforts through the commitment of significant resources to discovery, research and development programs and business development opportunities, particularly within areas of our scientific, manufacturing and technical capabilities. Our research is currently focused on additional improvements in the treatment of MS, solving some of the most challenging and complex diseases, including Alzheimer's disease, Parkinson's disease and amyotrophic lateral sclerosis (ALS), and employing innovative technologies to discover potential treatments for rare and genetic disorders, including new ways of treating diseases through gene therapy.

Our innovative drug development and commercialization activities are complemented by our biosimilar therapies that expand access to medicines and reduce the cost burden for healthcare systems. We are leveraging our manufacturing capabilities and know-how to develop, manufacture and market biosimilars through Samsung Bioepis, our joint venture with Samsung BioLogics Co. Ltd. (Samsung Biologics). Under our commercial agreement, we market and sell BENEPALI, an etanercept biosimilar referencing ENBREL, and FLIXABI, an infliximab biosimilar referencing REMICADE, in the European Union (E.U.).

Hemophilia Spin-Off

On February 1, 2017, we completed the spin-off of our hemophilia business, Bioverativ Inc. (Bioverativ), as an independent, publicly traded company. Our consolidated results of operations and financial position included in these unaudited condensed consolidated financial statements reflect the financial results of our hemophilia business for all periods through January 31, 2017.

For additional information related to the spin-off of our hemophilia business, please read Note 2, Hemophilia Spin-Off, to these condensed consolidated financial statements.

Basis of Presentation

In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring accruals, necessary for a fair presentation of our financial statements for interim periods in accordance with accounting principles generally accepted in the United States (U.S. GAAP). The information included in this quarterly report on Form 10-Q should be read in conjunction with our consolidated financial statements and the accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2016 ( 2016 Form 10-K). Our accounting policies are described in the “ Notes to Consolidated Financial Statements ” in our 2016 Form 10-K and updated, as necessary, in this Form 10-Q. The year-end condensed consolidated balance sheet data presented for comparative purposes was derived from our audited financial statements, but does not include all disclosures required by U.S. GAAP. The results of operations for the three months ended March 31, 2017 are not necessarily indicative of the operating results for the full year or for any other subsequent interim period.

We operate as one operating segment, which is focused on discovering, developing, manufacturing and delivering therapies to people living with serious neurological and neurodegenerative diseases.

Table of Contents

BIOGEN INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited, continued)

Consolidation

Our condensed consolidated financial statements reflect our financial statements, those of our wholly-owned subsidiaries and those of certain variable interest entities where we are the primary beneficiary. For consolidated entities where we own or are exposed to less than 100% of the economics, we record net income (loss) attributable to noncontrolling interests in our condensed consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. Intercompany balances and transactions are eliminated in consolidation.

In determining whether we are the primary beneficiary of an entity, we apply a qualitative approach that determines whether we have both (1) the power to direct the economically significant activities of the entity and (2) the obligation to absorb losses of, or the right to receive benefits from, the entity that could potentially be significant to that entity. These considerations impact the way we account for our existing collaborative relationships and other arrangements. We continuously assess whether we are the primary beneficiary of a variable interest entity as changes to existing relationships or future transactions may result in us consolidating or deconsolidating one or more of our collaborators or partners.

Use of Estimates

The preparation of our condensed consolidated financial statements requires us to make estimates, judgments and assumptions that may affect the reported amounts of assets, liabilities, equity, revenues and expenses and related disclosure of contingent assets and liabilities. On an ongoing basis we evaluate our estimates, judgments and methodologies. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable, the results of which form the basis for making judgments about the carrying values of assets, liabilities and equity and the amount of revenues and expenses. Actual results may differ from these estimates under different assumptions or conditions.

New Accounting Pronouncements

From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (FASB) or other standard setting bodies that we adopt as of the specified effective date. Unless otherwise discussed, we do not believe that the impact of recently issued standards that are not yet effective will have a material impact on our financial position or results of operations upon adoption.

In May 2014 the FASB issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes all existing revenue recognition requirements, including most industry-specific guidance. The new standard requires a company to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. The FASB has subsequently issued amendments to ASU No. 2014-09 that have the same effective date and transition date of January 1, 2018. We expect to adopt these standards using the modified retrospective method and continue to evaluate the potential impact that this standard may have on our financial position, results of operations and disclosures.

During 2016 the FASB issued the following new standards, which we adopted on January 1, 2017:


•	ASU No. 2016-06, Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments.


•	ASU No. 2016-07, Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting.


•	ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.

The adoption of these standards did not have a material impact on our financial position, results of operations or statement of cash flows; however, the adoption of ASU No. 2016-09 resulted in the reclassification of certain prior year amounts in our condensed consolidated statements of cash flows to conform to our current year presentation. Specifically, amounts previously disclosed in net cash flows used in financing activities related to our excess tax benefit from share-based compensation have been reclassified to net cash flows provided by operating activities and amounts related to cash paid when withholding shares for tax withholding purposes, previously disclosed in net cash flows provided by operating activities, have been reclassified to net cash flows used in financing activities.

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BIOGEN INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited, continued)

For additional information related to these standards, please read Note 1, Summary of Significant Accounting Policies: New Accounting Pronouncements , to our consolidated financial statements included in our 2016 Form 10-K.

In January 2016 the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The new standard amends certain aspects of accounting and disclosure requirements of financial instruments, including the requirement that equity investments with readily determinable fair values be measured at fair value with changes in fair value recognized in a company's results of operations. The new standard does not apply to investments accounted for under the equity method of accounting or those that result in consolidation of the investee. Equity investments that do not have readily determinable fair values may be measured at fair value or at cost minus impairment adjusted for changes in observable prices. A financial liability that is measured at fair value in accordance with the fair value option is required to be presented separately in other comprehensive income for the portion of the total change in the fair value resulting from change in the instrument-specific credit risk. In addition, a valuation allowance should be evaluated on deferred tax assets related to available-for-sale debt securities in combination with other deferred tax assets. The new standard will be effective for us on January 1, 2018. Based on our current investment holdings, the adoption of this standard is not expected to have a material impact on our financial position or results of operations; however, it will result in the reclassification of certain investments.

In February 2016 the FASB issued ASU No. 2016-02, Leases (Topic 842). The new standard requires that all lessees recognize the assets and liabilities that arise from leases on their balance sheet and disclose qualitative and quantitative information about their leasing arrangements. The new standard will be effective for us on January 1, 2019. We are currently evaluating the impact that this standard may have on our results of operations, financial position and disclosures. As of March 31, 2017, the adoption of this standard is not expected to have a material impact on our net financial position, but may materially impact the reported amount of total assets and total liabilities.

In June 2016 the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The new standard changes the impairment model for most financial assets and certain other instruments. Under the new standard, entities holding financial assets and net investment in leases that are not accounted for at fair value through net income are to be presented at the net amount expected to be collected. An allowance for credit losses will be a valuation account that will be deducted from the amortized cost basis of the financial asset to present the net carrying value at the amount expected to be collected on the financial asset. The new standard will be effective for us on January 1, 2020. The adoption of this standard is not expected to have a material impact on our financial position or results of operations.

In August 2016 the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The new standard clarifies certain aspects of the statement of cash flows, including the classification of debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investees and beneficial interests in securitization transactions. The new standard also clarifies that an entity should determine each separately identifiable source or use within the cash receipts and cash payments on the basis of the nature of the underlying cash flows. In situations in which cash receipts and payments have aspects of more than one class of cash flows and cannot be separated by source or use, the appropriate classification should depend on the activity that is likely to be the predominant source or use of cash flows for the item. The new standard will be effective for us on January 1, 2018. The adoption of this standard is not expected to have a material impact on our statements of cash flows upon adoption.

In October 2016 the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfer of Assets Other Than Inventory. This new standard eliminates the deferral of the tax effects of intra-entity transfers of an asset other than inventory. Under the new standard, entities should recognize the income tax consequences on an intra-entity transfer of an asset other than inventory when the transfer occurs. This new standard will be effective for us on January 1, 2018 and will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this standard is expected to have a material impact on our net financial position; however, the final effect of the adoption of this standard will depend on the nature and amount of future transactions.

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In January 2017 the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. This new standard clarifies the definition of a business and provides a screen to determine when an integrated set of assets and activities is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This new standard will be effective for us on January 1, 2018; however, we have adopted this standard as of January 1, 2017, with prospective application to any business development transaction.

In January 2017 the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test of Goodwill Impairment. This new standard simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. This new standard will be effective for us on January 1, 2020; however, early adoption is permitted. The adoption of this standard is not expected to have a material impact on our financial position or results of operations.

In March 2017 the FASB issued ASU No. 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This new standard will require that an employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allow only the service cost component of net benefit cost to be eligible for capitalization. The other components of the net periodic benefit cost must be presented separately from the line items that include service cost and outside of any subtotal of operating income on the condensed consolidated statements of income. The new standard will be effective for us on January 1, 2018. The adoption of this standard is not expected to have a material impact on our financial position or results of operations.

In March 2017 the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This new standard amends the amortization period for certain purchased callable debt securities held at a premium by shortening the amortization period for the premium to the earliest call date. The new standard will be effective for us on January 1, 2019. We are currently evaluating the potential impact that this standard may have on our financial position and results of operations.

2. Hemophilia Spin-Off

On February 1, 2017, we completed the spin-off of our hemophilia business, Bioverativ, as an independent, publicly traded company trading under the symbol "BIVV" on the Nasdaq Global Select Market. The spin-off was accomplished through the distribution of all the then outstanding shares of common stock of Bioverativ to Biogen shareholders, who received one share of Bioverativ common stock for every two shares of Biogen common stock. The separation and distribution was structured to be tax-free for shareholders for federal income tax purposes. Bioverativ assumed all of our rights and obligations under our collaboration agreement with Swedish Orphan Biovitrum AB and our collaboration and license agreement with Sangamo Biosciences Inc.

In connection with the distribution, Biogen and Bioverativ entered into a separation agreement and various other agreements (including a transition services agreement, a tax matters agreement, a manufacturing and supply agreement, an employee matters agreement, an intellectual property matters agreement and certain other commercial agreements). These agreements govern the separation and distribution and the relationship between the two companies going forward. They also provide for the performance of services by each company for the benefit of the other for a period of time. In addition, under the terms of the separation agreement, Bioverativ is obligated to indemnify us for many liabilities that may exist relating to its business activities, whether incurred prior to or after the distribution, including any pending or future litigation.

The services under these agreements generally commenced on February 1, 2017 (the distribution date) and are expected to terminate within 12 months of the distribution date, with the exception of the manufacturing and supply agreement which has an initial term of five years , with a five year extension at Bioverativ's sole discretion and a further five year extension with Bioverativ and our consent.

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(unaudited, continued)

In connection with the distribution we made a net cash contribution to Bioverativ, during the first quarter of 2017, totalling $302.7 million . The following table summarizes the assets and liabilities that were charged against equity as a result of the spin-off of our hemophilia business:



(In millions)
Assets
Cash	$	302.7
Accounts receivable	144.7
Inventory	116.1
Property, plant and equipment, net	20.2
Intangible assets, net	56.8
Goodwill	314.1
Other, net	53.7
Assets transferred, net	$	1,008.3

Liabilities
Accrued expenses and other current liabilities	$	87.8
Other long-term liabilities	67.7
Liabilities transferred, net	$	155.5

Under the manufacturing and supply agreement, we manufacture and supply certain products and materials to Bioverativ. During the first quarter of 2017, we recognized $3.1 million in revenues in relation to these services which is reflected as a component of other revenues in our condensed consolidated statements of income. We also recorded $2.9 million as cost of sales in relation to these services during the first quarter of 2017.

Pursuant to the terms of our agreements with Bioverativ, upon completion of the spin-off, we have continued to distribute ALPROLIX and ELOCTATE on behalf of Bioverativ and expect to do so until Bioverativ obtains appropriate regulatory authorizations in certain countries, including the United States (U.S.) and Canada. Under this arrangement, we are distributing these products as an agent of Bioverativ and will also provide related cash management services in connection with sales transactions, including the collection of receivables and the remittance of applicable discounts and allowances. Our consolidated financial position and results of operations do not reflect recognition of activity or balances related to these transactions.

Amounts earned under the non-manufacturing and supply related transaction service agreements are recorded as a reduction of costs and expenses in their respective expense line items, primarily in selling, general and administrative expenses, in our condensed consolidated statements of income. In the first quarter of 2017 these amounts were not significant.

Hemophilia related product revenues reflected in our condensed consolidated statements of income for the three months ended March 31, 2017 and 2016 totaled $74.4 million and $182.7 million , respectively. Results for the three months ended March 31, 2017 , only reflect hemophilia-related product revenues through January 31, 2017.

Patents

Prior to the spin-off of our hemophilia business, we were awarded various methods of treatment and composition of matter patents related to ELOCTATE and ALPROLIX. Upon completion of the spin-off, these patents were transferred to the patent portfolio of Bioverativ.

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3. Reserves for Discounts and Allowances

An analysis of the change in reserves for discounts and allowances is summarized as follows:



(In millions)	Discounts			Contractual Adjustments			Returns			Total
Balance, as of December 31, 2016	$	71.6		$	482.7		$	51.2		$	605.5
Current provisions relating to sales in current year	131.3			568.2			7.6			707.1
Adjustments relating to prior years	0.7			0.8			(6.3		)	(4.8		)
Payments/credits relating to sales in current year	(62.3		)	(231.7		)	—			(294.0		)
Payments/credits relating to sales in prior years	(64.4		)	(267.5		)	(5.4		)	(337.3		)
Balance, as of March 31, 2017	$	76.9		$	552.5		$	47.1		$	676.5

The total reserves above, included in our condensed consolidated balance sheets, are summarized as follows:



(In millions)	As of March 31, 2017		As of December 31, 2016
Reduction of accounts receivable	$	171.2	$	166.9
Component of accrued expenses and other	505.3		438.6
Total reserves	$	676.5	$	605.5

4. Inventory

The components of inventory are summarized as follows:



(In millions)	As of March 31, 2017		As of December 31, 2016
Raw materials	$	158.2	$	170.4
Work in process	644.4		698.7
Finished goods	156.8		170.3
Total inventory	$	959.4	$	1,039.4

Balance Sheet Classification:
Inventory	$	921.6	$	1,001.6
Investments and other assets	37.8		37.8
Total inventory	$	959.4	$	1,039.4

Long-term inventory, which primarily consists of work in process, is included in investments and other assets in our condensed consolidated balance sheets.

Balances in the table above as of March 31, 2017 , also reflect the elimination of certain amounts transferred to Bioverativ in connection with the completion of the spin-off of our hemophilia business. Balances transferred to Bioverativ were related to work in process and finished goods inventory, totaled $84.5 million and $31.6 million , respectively.

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(unaudited, continued)

5. Intangible Assets and Goodwill

Intangible Assets

Intangible assets, net of accumulated amortization, impairment charges and adjustments, are summarized as follows:



		As of March 31, 2017							As of December 31, 2016
(In millions)	Estimated Life	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization			Net
Out-licensed patents	13-23 years	$	543.3	$	(526.6	)	$	16.7	$	543.3	$	(523.6	)	$	19.7
Developed technology	15-23 years	3,005.3		(2,648.1		)	357.2		3,005.3		(2,634.3		)	371.0
In-process research and development	Indefinite until commercialization	653.7		—			653.7		648.0		—			648.0
Trademarks and tradenames	Indefinite	64.0		—			64.0		64.0		—			64.0
Acquired and in-licensed rights and patents	4-18 years	3,887.1		(874.8		)	3,012.3		3,481.7		(776.1		)	2,705.6
Total intangible assets		$	8,153.4	$	(4,049.5	)	$	4,103.9	$	7,742.3	$	(3,934.0	)	$	3,808.3

For the three months ended March 31, 2017 , amortization of acquired intangible assets totaled $448.5 million , as compared to $88.8 million in the prior year comparative period. Amortization of acquired intangible assets for the three months ended March 31, 2017 , includes $353.6 million of impairment and amortization charges related to our U.S. and rest of world licenses to Forward Pharma's intellectual property related to TECFIDERA, as further discussed below. In-process research and development balances include adjustments related to foreign currency exchange rate fluctuations.

Balances in the table above as of March 31, 2017 also reflect the elimination of certain amounts transferred to Bioverativ in connection with the completion of the spin-off of our hemophilia business. For additional information relating to the spin-off of our hemophilia business, please read Note 2, Hemophilia Spin-Off, to these condensed consolidated financial statements.

Developed Technology

Developed technology primarily relates to our AVONEX product, which was recorded in connection with the merger of Biogen, Inc. and IDEC Pharmaceuticals Corporation in 2003. The net book value of this asset as of March 31, 2017 was $349.8 million .

Acquired and In-licensed Rights and Patents

Acquired and in-licensed rights and patents primarily relate to our acquisition of all remaining rights to TYSABRI from Elan Corporation plc. The net book value of this asset as of March 31, 2017 was $2,418.6 million .

In January 2017 we entered into a settlement and license agreement among Biogen Swiss Manufacturing GmbH, Biogen International Holding Ltd., Forward Pharma A/S (Forward Pharma) and certain related parties, which was effective as of February 1, 2017. Pursuant to the agreement, we obtained U.S. and rest of world licenses to Forward Pharma's intellectual property, including Forward Pharma's intellectual property related to TECFIDERA. In exchange, we agreed to pay Forward Pharma $1.25 billion in cash. During the fourth quarter of 2016, we recognized a pre-tax charge of $454.8 million related to this agreement, representing the fair value of our license to Forward Pharma’s intellectual property for the period April 2014, when we started selling TECFIDERA, through December 31, 2016. For additional information related to this agreement, please read Note 21, Commitments and Contingencies , to our consolidated financial statements included in our 2016 Form 10-K.

We paid the $1.25 billion in February 2017 and recognized an intangible asset of $795.2 million . The asset represented the fair value of the U.S. and rest of world licenses to Forward Pharma’s intellectual property related to TECFIDERA revenues for the period January 2017, the month in which we entered into the agreement, through December 2020, the last month before royalty payments could first commence pursuant to the agreement.

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(unaudited, continued)

We have two intellectual property disputes with Forward Pharma, one in the U.S. and one in the E.U., concerning intellectual property related to TECFIDERA. On March 31, 2017, the U.S. intellectual property dispute was decided in our favor. Forward Pharma has announced that it intends to appeal this decision. For additional information related to these disputes, please read Note 18, Litigation , to these condensed consolidated financial statements.

As we prevailed in the U.S. proceeding in March 2017, we evaluated the recoverability of the U.S. asset acquired from Forward Pharma and recorded an impairment charge to adjust the carrying value of the acquired U.S. asset to fair value reflecting the impact of the developments in the U.S. legal dispute. We also continued to amortize the remaining net book value of the U.S. and rest of world intangible assets in our condensed consolidated statements of income utilizing an economic consumption model.

Estimated Future Amortization of Intangible Assets

Our amortization expense is based on the economic consumption of intangible assets. Our most significant intangible assets are related to our AVONEX and TYSABRI products. Annually, during our long-range planning cycle, we perform an analysis of anticipated lifetime revenues of AVONEX and TYSABRI. This analysis is also updated whenever we determine events or changes in circumstances would significantly affect the anticipated lifetime revenues of either product. Our most recent long range planning cycle was completed in the third quarter of 2016.

Based upon the above, the estimated future amortization of acquired intangible assets is expected to be as follows:



(In millions)	As of March 31, 2017
2017 (remaining nine months)	$	346.5
2018	425.5
2019	412.4
2020	378.5
2021	239.2
2022	216.7

Goodwill

The following table provides a roll forward of the changes in our goodwill balance:



(In millions)	As of March 31, 2017
Goodwill, beginning of period	$	3,669.3
Elimination of goodwill allocated to our hemophilia business	(314.1		)
Increase to goodwill	254.7
Other	1.8
Goodwill, end of period	$	3,611.7

The elimination of goodwill represents an allocation based upon the relative enterprise fair value of the hemophilia business as of the distribution date. For additional information relating to the spin-off of our hemophilia business, please read Note 2, Hemophilia Spin-Off, to these condensed consolidated financial statements.

The increase in goodwill during the three months ended March 31, 2017 was related to $300.0 million in contingent milestones achieved (exclusive of $45.3 million in tax benefits) and payable to the former shareholders of Fumapharm AG or holders of their rights. Other includes changes in foreign currency exchange rates. For additional information related to future contingent payments to the former shareholders of Fumapharm AG or holders of their rights, please read Note 21, Commitments and Contingencies, to our consolidated financial statements included in our 2016 Form 10-K.

As of March 31, 2017 , we had no accumulated impairment losses related to goodwill.

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(unaudited, continued)

6. Fair Value Measurements

The tables below present information about our assets and liabilities that are regularly measured and carried at fair value and indicate the level within the fair value hierarchy of the valuation techniques we utilized to determine such fair value:



As of March 31, 2017 (In millions)	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	$	645.1	$	—	$	645.1	$	—
Marketable debt securities:
Corporate debt securities	2,500.7		—		2,500.7		—
Government securities	1,738.2		—		1,738.2		—
Mortgage and other asset backed securities	542.5		—		542.5		—
Marketable equity securities	18.7		18.7		—		—
Derivative contracts	44.5		—		44.5		—
Plan assets for deferred compensation	31.0		—		31.0		—
Total	$	5,520.7	$	18.7	$	5,502.0	$	—
Liabilities:
Derivative contracts	$	13.6	$	—	$	13.6	$	—
Contingent consideration obligations	470.9		—		—		470.9
Total	$	484.5	$	—	$	13.6	$	470.9



As of December 31, 2016 (In millions)	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	$	2,039.6	$	—	$	2,039.6	$	—
Marketable debt securities:
Corporate debt securities	2,663.8		—		2,663.8		—
Government securities	2,172.5		—		2,172.5		—
Mortgage and other asset backed securities	561.7		—		561.7		—
Marketable equity securities	24.9		24.9		—		—
Derivative contracts	61.0		—		61.0		—
Plan assets for deferred compensation	34.5		—		34.5		—
Total	$	7,558.0	$	24.9	$	7,533.1	$	—
Liabilities:
Derivative contracts	$	13.6	$	—	$	13.6	$	—
Contingent consideration obligations	467.6		—		—		467.6
Total	$	481.2	$	—	$	13.6	$	467.6

There have been no material impairments of our assets measured and carried at fair value during the three months ended March 31, 2017 . In addition, there were no changes in valuation techniques or inputs utilized or transfers between fair value measurement levels during the three months ended March 31, 2017 . The fair values of Level 2 instruments classified as cash equivalents and marketable debt securities were determined through third party pricing services. For a description of our validation procedures related to prices provided by third party pricing services, please read Note 1, Summary of Significant Accounting Policies: Fair Value Measurements, to our consolidated financial statements included in our 2016 Form 10-K.

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(unaudited, continued)

Debt Instruments

The fair and carrying values of our debt instruments, which are Level 2 liabilities, are summarized as follows:



	As of March 31, 2017				As of December 31, 2016
(In millions)	Fair Value		Carrying Value		Fair Value		Carrying Value
Notes payable to Fumedica AG	$	6.3	$	6.3	$	6.1	$	6.0
6.875% Senior Notes due March 1, 2018	575.7		556.7		583.7		558.5
2.900% Senior Notes due September 15, 2020	1,528.1		1,483.2		1,521.5		1,485.3
3.625% Senior Notes due September 15, 2022	1,032.4		993.5		1,026.6		993.2
4.050% Senior Notes due September 15, 2025	1,812.9		1,735.2		1,796.0		1,734.8
5.200% Senior Notes due September 15, 2045	1,890.0		1,721.6		1,874.5		1,721.5
Total	$	6,845.4	$	6,496.5	$	6,808.4	$	6,499.3

The fair value of our notes payable to Fumedica AG was estimated using market observable inputs, including current interest and foreign currency exchange rates. The fair values of each of our series of Senior Notes were determined through market, observable and corroborated sources. For additional information related to our debt instruments, please read Note 11, Indebtedness, to our consolidated financial statements included in our 2016 Form 10-K.

Contingent Consideration Obligations

The following table provides a roll forward of the fair values of our contingent consideration obligations that includes Level 3 measurements:



	For the Three Months Ended March 31,
(In millions)	2017			2016
Fair value, beginning of period	$	467.6		$	506.0
Additions	—			—
Changes in fair value	10.0			2.3
Payments	(6.7		)	—
Fair value, end of period	$	470.9		$	508.3

As of March 31, 2017 and December 31, 2016 , approximately $254.1 million and $246.8 million , respectively, of our contingent consideration obligations valued using Level 3 measurements were reflected as components of other long-term liabilities in our condensed consolidated balance sheets with the remaining balances reflected as a component of accrued expenses and other.

7. Financial Instruments

The following table summarizes our financial assets with maturities of less than 90 days from the date of purchase included in cash and cash equivalents on the accompanying condensed consolidated balance sheets:



(In millions)	As of March 31, 2017		As of December 31, 2016
Commercial paper	$	71.9	$	31.0
Money market funds	519.2		741.7
Short-term debt securities	54.0		1,266.9
Total	$	645.1	$	2,039.6

The carrying values of our commercial paper, including accrued interest, money market funds and short-term debt securities approximate fair value due to their short-term maturities.

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The following tables summarize our marketable debt and equity securities, classified as available-for-sale:



As of March 31, 2017 (In millions)	Fair Value		Gross Unrealized Gains		Gross Unrealized Losses			Amortized Cost
Corporate debt securities
Current	$	1,288.5	$	0.1	$	(0.8	)	$	1,289.2
Non-current	1,212.2		2.1		(3.3		)	1,213.4
Government securities
Current	664.4		0.2		(0.4		)	664.6
Non-current	1,073.8		0.8		(3.0		)	1,076.0
Mortgage and other asset backed securities
Current	3.3		—		—			3.3
Non-current	539.2		1.1		(1.4		)	539.5
Total marketable debt securities	$	4,781.4	$	4.3	$	(8.9	)	$	4,786.0
Marketable equity securities, non-current	$	18.7	$	—	$	(14.9	)	$	33.6



As of December 31, 2016 (In millions)	Fair Value		Gross Unrealized Gains		Gross Unrealized Losses			Amortized Cost
Corporate debt securities
Current	$	1,408.6	$	0.2	$	(0.6	)	$	1,409.0
Non-current	1,255.2		1.2		(4.7		)	1,258.7
Government securities
Current	1,156.0		0.2		(0.3		)	1,156.1
Non-current	1,016.5		0.5		(3.4		)	1,019.4
Mortgage and other asset backed securities
Current	4.0		—		—			4.0
Non-current	557.7		0.8		(2.2		)	559.1
Total marketable debt securities	$	5,398.0	$	2.9	$	(11.2	)	$	5,406.3
Marketable equity securities, non-current	$	24.9	$	0.7	$	(9.3	)	$	33.5

Summary of Contractual Maturities: Available-for-Sale Securities

The estimated fair value and amortized cost of our marketable debt securities available-for-sale by contractual maturity are summarized as follows:



	As of March 31, 2017				As of December 31, 2016
(In millions)	Estimated Fair Value		Amortized Cost		Estimated Fair Value		Amortized Cost
Due in one year or less	$	1,956.2	$	1,957.1	$	2,568.6	$	2,569.1
Due after one year through five years	2,561.9		2,565.4		2,552.6		2,559.7
Due after five years	263.3		263.5		276.8		277.5
Total available-for-sale securities	$	4,781.4	$	4,786.0	$	5,398.0	$	5,406.3

The average maturity of our marketable debt securities available-for-sale as of March 31, 2017 and December 31, 2016 was approximately 17 months and 12 months , respectively.

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(unaudited, continued)

Proceeds from Marketable Debt Securities

The proceeds from maturities and sales of marketable debt securities and resulting realized gains and losses are summarized as follows:



	For the Three Months Ended March 31,
(In millions)	2017			2016
Proceeds from maturities and sales	$	1,884.3		$	1,181.1
Realized gains	$	1.2		$	0.4
Realized losses	$	(1.9	)	$	(0.4	)

Strategic Investments

As of March 31, 2017 and December 31, 2016 , our strategic investment portfolio was comprised of investments totaling $99.5 million and $99.9 million , respectively, which are included in investments and other assets in our condensed consolidated balance sheets. Our strategic investment portfolio includes investments in equity securities of certain biotechnology companies and investments in venture capital funds where the underlying investments are in equity securities of biotechnology companies.

8. Derivative Instruments

Foreign Currency Forward Contracts - Hedging Instruments

Due to the global nature of our operations, portions of our revenues and operating expenses are recorded in currencies other than the U.S. dollar. The value of revenues and operating expenses measured in U.S. dollars is therefore subject to changes in foreign currency exchange rates. In order to mitigate these changes we use foreign currency forward contracts to lock in exchange rates associated with a portion of our forecasted international revenues and operating expenses.

Foreign currency forward contracts in effect as of March 31, 2017 and December 31, 2016 , had durations of 1 to 18 months . These contracts have been designated as cash flow hedges, and, accordingly, to the extent effective, any unrealized gains or losses on these foreign currency forward contracts are reported in accumulated other comprehensive income (loss) (referred to as AOCI in the tables below). Realized gains and losses for the effective portion of such contracts are recognized in revenue when the sale of product in the currency being hedged is recognized and in operating expenses when the expense in the currency being hedged is recorded. To the extent ineffective, hedge transaction gains and losses are reported in other income (expense), net.

The notional value of foreign currency forward contracts that were entered into to hedge forecasted revenues and operating expenses is summarized as follows:



	Notional Amount
Foreign Currency: (In millions)	As of March 31, 2017		As of December 31, 2016
Euro	$	1,215.7	$	871.7
British pound	113.1		—
Canadian dollar	59.6		—
Swiss franc	58.2		—
Total foreign currency forward contracts	$	1,446.6	$	871.7

The portion of the fair value of these foreign currency forward contracts that was included in accumulated other comprehensive income (loss) in total equity reflected net gains of $26.0 million and $49.8 million as of March 31, 2017 and December 31, 2016 , respectively. We expect all contracts outstanding as of March 31, 2017 , to be settled over the next 18 months and any amounts in accumulated other comprehensive income (loss) to be reported as an adjustment to revenue or operating expense. We consider the impact of our and our counterparties’ credit risk on the fair value of the contracts as well as the ability of each party to execute its contractual obligations. As of March 31, 2017 and December 31, 2016 , credit risk did not change the fair value of our foreign currency forward contracts.

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The following tables summarize the effect of foreign currency forward contracts designated as hedging instruments on our condensed consolidated statements of income:



For the Three Months Ended March 31,
Net Gains/(Losses) Reclassified from AOCI into Operating Income (Effective Portion)							Net Gains/(Losses) Recognized into Net Income (Ineffective Portion)
Location	2017			2016			Location	2017			2016
Revenue	$	6.7		$	8.8		Other income (expense)	$	4.0		$	1.9
Operating expenses	$	(0.1	)	$	(0.1	)	Other income (expense)	$	(0.2	)	$	(0.3	)

Interest Rate Contracts - Hedging Instruments

We have entered into interest rate swap contracts on certain borrowing transactions to manage our exposure to interest rate changes.

In connection with the issuance of our 2.90% Senior Notes, we entered into interest rate swaps with an aggregate notional amount of $675.0 million , which expire on September 15, 2020. The interest rate swap contracts are designated as hedges of the fair value changes in the 2.90% Senior Notes attributable to changes in interest rates. Since the specific terms and notional amount of the swaps match the debt being hedged, it is assumed to be a highly effective hedge and all changes in the fair value of the swaps are recorded as a component of our 2.90% Senior Notes with no net impact recorded in income. Any net interest payments made or received on the interest rate swap contracts are recognized as a component of interest expense in our condensed consolidated statements of income.

Foreign Currency Forward Contracts - Other Derivatives

We also enter into other foreign currency forward contracts, usually with durations of one month or less, to mitigate the foreign currency risk related to certain balance sheet positions. We have not elected hedge accounting for these transactions.

The aggregate notional amount of these outstanding foreign currency contracts was $332.9 million and $902.1 million as of March 31, 2017 and December 31, 2016 , respectively. A net gain of $1.6 million related to these contracts was recognized as a component of other income (expense), net for the three months ended March 31, 2017 , as compared to a net gain of $2.4 million in the prior year comparative period.

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Summary of Derivatives

While certain of our derivatives are subject to netting arrangements with our counterparties, we do not offset derivative assets and liabilities in our condensed consolidated balance sheets.

The following table summarizes the fair value and presentation in our condensed consolidated balance sheets of our outstanding derivatives including those designated as hedging instruments:



		Fair Value
(In millions)	Balance Sheet Location	As of March 31, 2017
Hedging Instruments:
Asset derivatives	Other current assets	$	38.3
	Investments and other assets	$	3.3
Liability derivatives	Accrued expenses and other	$	4.2
	Other long-term liabilities	$	7.7
Other Derivatives:
Asset derivatives	Other current assets	$	2.9
Liability derivatives	Accrued expenses and other	$	1.7

		Fair Value
(In millions)	Balance Sheet Location	As of December 31, 2016
Hedging Instruments:
Asset derivatives	Other current assets	$	50.4
	Investments and other assets	$	6.6
Liability derivatives	Other long-term liabilities	$	4.6
Other Derivatives:
Asset derivatives	Other current assets	$	4.0
Liability derivatives	Accrued expenses and other	$	9.0

9. Property, Plant and Equipment

Property, plant and equipment are recorded at historical cost, net of accumulated depreciation. Accumulated depreciation on property, plant and equipment was $1,438.1 million and $1,439.3 million as of March 31, 2017 and December 31, 2016 , respectively.

Solothurn, Switzerland Facility

During the first quarter of 2016 we purchased land in Solothurn, Switzerland for 64.4 million Swiss Francs (approximately $62.5 million ), where we are building a biologics manufacturing facility over the next several years. As of March 31, 2017 and December 31, 2016 , we had $609.8 million and $481.5 million , respectively, capitalized as construction in progress related to the construction of this facility. As of March 31, 2017 , we had contractual commitments of approximately $216.0 million for the construction of this facility.

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10. Equity

Total equity as of March 31, 2017 decreased $661.2 million compared to December 31, 2016 . This decrease was primarily driven by an adjustment to retained earnings of $852.8 million reflecting the spin-off of our hemophilia business, as described in Note 2, Hemophilia Spin-Off, to these condensed consolidated financial statements and share repurchases of $583.6 million , as described below. These decrease were partially offset by net income attributable to Biogen Inc. of $747.6 million .

Share Repurchases

In July 2016 our Board of Directors authorized a program to repurchase up to $5.0 billion of our common stock (2016 Share Repurchase Program). This authorization does not have an expiration date. All share repurchases under this authorization will be retired. During the three months ended March 31, 2017 , we repurchased and retired 0.8 million shares of common stock at a cost of $218.2 million under this program. As of March 31, 2017 , we have repurchased 4.1 million shares of common stock at a cost of $1.2 billion under our 2016 Share Repurchase Program.

In February 2011 our Board of Directors authorized a program to repurchase up to 20.0 million shares of common stock (2011 Share Repurchase Program). During the three months ended March 31, 2017 , we repurchased 1.3 million shares of common stock at a cost of $365.4 million to complete this program. During the three months ended March 31, 2016 , we did not repurchase any shares of common stock under our 2011 Share Repurchase Program.

Noncontrolling Interests

The following table reconciles equity (deficit) attributable to noncontrolling interests (NCI):



	For the Three Months Ended March 31,
(In millions)	2017			2016
NCI, beginning of period	$	(11.5	)	$	2.1
Net income (loss) attributable to NCI, net of tax	(0.1		)	(1.7		)
Fair value of net assets and liabilities acquired and assigned to NCI	—			0.9
NCI, end of period	$	(11.6	)	$	1.3

11. Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in accumulated other comprehensive income (loss), net of tax by component:



(In millions)	Unrealized Gains (Losses) on Securities Available for Sale, Net of Tax			Unrealized Gains (Losses) on Cash Flow Hedges, Net of Tax			Unfunded Status of Postretirement Benefit Plans, Net of Tax			Translation Adjustments			Total
Balance, as of December 31, 2016	$	(10.8	)	$	57.8		$	(32.7	)	$	(334.2	)	$	(319.9	)
Other comprehensive income (loss) before reclassifications	(2.0		)	(17.1		)	0.1			20.0			1.0
Amounts reclassified from accumulated other comprehensive income (loss)	0.4			(6.7		)	—			—			(6.3		)
Net current period other comprehensive income (loss)	(1.6		)	(23.8		)	0.1			20.0			(5.3		)
Balance, as of March 31, 2017	$	(12.4	)	$	34.0		$	(32.6	)	$	(314.2	)	$	(325.2	)

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(In millions)	Unrealized Gains (Losses) on Securities Available for Sale, Net of Tax			Unrealized Gains (Losses) on Cash Flow Hedges, Net of Tax			Unfunded Status of Postretirement Benefit Plans, Net of Tax			Translation Adjustments			Total
Balance, as of December 31, 2015	$	(0.8	)	$	10.2		$	(37.8	)	$	(195.6	)	$	(224.0	)
Other comprehensive income (loss) before reclassifications	2.5			(38.9		)	0.2			9.6			(26.6		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			(8.7		)	—			—			(8.7		)
Net current period other comprehensive income (loss)	2.5			(47.6		)	0.2			9.6			(35.3		)
Balance, as of March 31, 2016	$	1.7		$	(37.4	)	$	(37.6	)	$	(186.0	)	$	(259.3	)

The following table summarizes the amounts reclassified from accumulated other comprehensive income:



(In millions)	Income Statement Location	Amounts Reclassified from Accumulated Other Comprehensive Income
		For the Three Months Ended March 31,
		2017			2016
Gains (losses) on securities available for sale	Other income (expense)	$	(0.7	)	$	—
	Income tax benefit (expense)	0.3			—

Gains (losses) on cash flow hedges	Revenues	6.7			8.8
	Operating expenses	(0.1		)	(0.1		)
	Other income (expense)	0.1			0.1
	Income tax benefit (expense)	—			(0.1		)

Total reclassifications, net of tax		$	6.3		$	8.7

12. Earnings per Share

Basic and diluted earnings per share are calculated as follows:



	For the Three Months Ended March 31,
(In millions)	2017		2016
Numerator:
Net income attributable to Biogen Inc.	$	747.6	$	970.9
Denominator:
Weighted-average number of common shares outstanding	215.6		218.9
Effect of dilutive securities:
Stock options and employee stock purchase plan	—		0.1
Time-vested restricted stock units	0.2		0.2
Market stock units	0.1		0.1
Dilutive potential common shares	0.3		0.4
Shares used in calculating diluted earnings per share	215.9		219.3

Amounts excluded from the calculation of net income per diluted share because their effects were anti-dilutive were insignificant.

The adjustments related to the spin-off of our hemophilia business did not have a material impact on the potentially dilutive securities to be considered in the calculation of diluted earnings per share of common stock.

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13. Share-based Payments

Share-based Compensation Expense

The following table summarizes share-based compensation expense included in our condensed consolidated statements of income:



	For the Three Months Ended March 31,
(In millions)	2017			2016
Research and development	$	18.7		$	21.4
Selling, general and administrative	29.4			34.7
Restructuring charges	—			(1.8		)
Subtotal	48.1			54.3
Capitalized share-based compensation costs	(2.7		)	(3.1		)
Share-based compensation expense included in total cost and expenses	45.4			51.2
Income tax effect	(12.4		)	(15.2		)
Share-based compensation expense included in net income attributable to Biogen Inc.	$	33.0		$	36.0

The following table summarizes share-based compensation expense associated with each of our share-based compensation programs:



	For the Three Months Ended March 31,
(In millions)	2017			2016
Market stock units	$	9.6		$	13.4
Time-vested restricted stock units	26.9			30.1
Cash settled performance units	3.5			0.2
Performance units	4.5			6.9
Employee stock purchase plan	3.6			3.7
Subtotal	48.1			54.3
Capitalized share-based compensation costs	(2.7		)	(3.1		)
Share-based compensation expense included in total cost and expenses	$	45.4		$	51.2

We estimate the fair value of our obligations associated with our performance units and cash settled performance units at the end of each reporting period through expected settlement. Cumulative adjustments to these obligations are recorded each quarter to reflect changes in the stock price and estimated outcome of the performance-related conditions.

Spin-off Related Equity Adjustments

Pursuant to an employee matters agreement entered into in connection with the spin-off of our hemophilia business and the provisions of our existing stock-based compensation arrangements, we made certain adjustments to the number and terms of our outstanding stock options, restricted stock units, cash settled performance units and other share-based awards to preserve the intrinsic value of the awards immediately before and after the spin-off. For purposes of the vesting of these equity awards, continued employment or service with Biogen or with Bioverativ was treated as continued employment for purposes of both Biogen’s and Bioverativ’s equity awards with the outstanding awards continuing to vest over their respective original vesting periods. Outstanding unvested awards for employees transferring to Bioverativ were converted to unvested Bioverativ awards.

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Adjustments to the number of our share-based compensation awards were made using an adjustment ratio based upon the weighted-average closing price of our common stock for the 10 calendar days prior to the effective date of the spin-off and the volume weighted-average prices for the 10 calendar days of our common stock following the effective date of the spin-off. For stock options, the exercise prices of the awards were modified to maintain the pre-spin intrinsic value of the awards in relation to the post-spin stock price of Biogen. The difference between the fair value of the awards based upon the adjustment ratio and the opening price on the distribution date was not material.

14. Income Taxes

A reconciliation between the U.S. federal statutory tax rate and our effective tax rate is summarized as follows:



	For the Three Months Ended March 31,
	2017		2016
Statutory rate	35.0	%	35.0	%
State taxes	0.1		1.0
Taxes on foreign earnings	(11.2	)	(8.1	)
Credits and net operating loss utilization	(0.7	)	(1.2	)
Purchased intangible assets	1.4		1.1
Manufacturing deduction	(2.1	)	(1.8	)
Other permanent items	0.7		0.6
Other	1.0		0.3
Effective tax rate	24.2	%	26.9	%

For the three months ended March 31, 2017 , compared to the same period in 2016 , the decrease in our effective tax rate was primarily due to a lower relative percentage of our earnings being recognized in the U.S., a high tax jurisdiction, along with a higher deduction for U.S. manufacturing activities and the favorable settlement of a state tax matter.

Accounting for Uncertainty in Income Taxes

We and our subsidiaries are routinely examined by various taxing authorities. We file income tax returns in various U.S. states and in U.S. federal and other foreign jurisdictions. With few exceptions, we are no longer subject to U.S. federal tax examination for years before 2013 or state, local or non-U.S. income tax examinations for years before 2005.

We made payments totaling approximately $56.0 million to the Danish Tax Authority (SKAT) for assessments received for fiscal 2009, 2011 and 2013 regarding withholding taxes and the treatment of certain intercompany transactions involving a Danish affiliate and another of our affiliates. We continue to dispute the assessments for all of these periods and believe that the positions taken in our historical filings are valid.

15. Other Consolidated Financial Statement Detail

Other Income (Expense), Net

Components of other income (expense), net, are summarized as follows:



	For the Three Months Ended March 31,
(In millions)	2017			2016
Interest income	$	16.7		$	11.2
Interest expense	(63.4		)	(63.3		)
Gain (loss) on investments, net	2.4			1.6
Foreign exchange gains (losses), net	4.0			2.1
Other, net	2.7			(4.4		)
Total other income (expense), net	$	(37.6	)	$	(52.8	)

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Other Current Assets

Other current assets include prepaid taxes totaling approximately $935.6 million and $817.0 million as of March 31, 2017 and December 31, 2016 , respectively.

Accrued Expenses and Other

Accrued expenses and other consists of the following:



(In millions)	As of March 31, 2017		As of December 31, 2016
Current portion of contingent consideration obligations and milestones	$	516.8	$	580.8
Revenue-related reserves for discounts and allowances	505.3		438.6
Royalties and licensing fees	181.0		195.8
Employee compensation and benefits	160.5		282.9
Construction in progress	116.2		134.0
Collaboration expenses	89.8		130.9
Accrued TECFIDERA litigation settlement and license charges	—		454.8
Other	475.0		685.7
Total accrued expenses and other	$	2,044.6	$	2,903.5

Pricing of TYSABRI in Italy - AIFA

In the first quarter of 2017, we reached an agreement with the Price and Reimbursement Committee of the Italian National Medicines Agency (Agenzia Italiana del Farmaco, or AIFA) resolving all of AIFA's claims relating to sales of TYSABRI in excess of the reimbursement limit for prior periods for an aggregate repayment of approximately EUR 37.4 million . As a result of this agreement we have agreed to dismiss the appeal and in the first quarter of 2017 we recognized EUR 41.8 million (approximately $44.6 million ) in revenues for sales which were previously deferred. These amounts were previously accrued for and included in the table above in Other.

For additional information regarding our agreement with AIFA relating to sales of TYSABRI in Italy, please read Note 18, Litigation, to these financial statements.

16. Investments in Variable Interest Entities

Consolidated Variable Interest Entities

Our condensed consolidated financial statements include the financial results of variable interest entities in which we are the primary beneficiary.

Neurimmune SubOne AG

In 2007 we entered into a collaboration agreement with Neurimmune SubOne AG (Neurimmune), a subsidiary of Neurimmune AG, for the development and commercialization of antibodies for the treatment of Alzheimer’s disease. Neurimmune conducts research to identify potential therapeutic antibodies and we are responsible for the development, manufacturing and commercialization of all products.

We consolidate the results of Neurimmune as we determined that we are the primary beneficiary of Neurimmune because we have the power through the collaboration to direct the activities that most significantly impact the entity’s economic performance and are required to fund 100% of the research and development costs incurred in support of the collaboration agreement.

Amounts incurred by Neurimmune for research and development expenses in support of the collaboration and reimbursed by us were immaterial for the three months ended March 31, 2017 and 2016 .

The assets and liabilities of Neurimmune are not significant to our financial position or results of operations as it is a research and development organization. We have provided no financing to Neurimmune other than previously contractually required amounts.

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Unconsolidated Variable Interest Entities

We have relationships with other variable interest entities that we do not consolidate as we lack the power to direct the activities that significantly impact the economic success of these entities. These relationships include investments in certain biotechnology companies and research collaboration agreements.

As of March 31, 2017 and December 31, 2016 , the total carrying value of our investments in biotechnology companies totaled $53.5 million and $47.4 million , respectively. Our maximum exposure to loss related to these variable interest entities is limited to the carrying value of our investments.

We have also entered into research collaboration agreements with certain variable interest entities where we are required to fund certain development activities. These development activities are included in research and development expense in our condensed consolidated statements of income as they are incurred. We have provided no financing to these variable interest entities other than previously contractually required amounts.

For additional information related to our investments in Neurimmune and other variable interest entities, please read Note 18, Investments in Variable Interest Entities, to our consolidated financial statements included in our 2016 Form 10-K.

17. Collaborative and Other Relationships

Bristol-Myers Squibb Company

On April 13, 2017, we entered into an agreement to exclusively license BMS-986168, a Phase 2-ready experimental medicine with potential in Alzheimer’s disease (AD) and progressive supranuclear palsy (PSP), from Bristol-Myers Squibb Company (BMS). BMS-986168 is an antibody targeting tau, the protein that forms the deposits, or tangles, in the brain associated with AD and other neurodegenerative tauopathies such as PSP. PSP is a rare condition that affects movement, speech, vision and cognitive function.

Under the agreement, we will receive worldwide rights to BMS-986168 and will be responsible for the full development and global commercialization of BMS-986168 in AD and PSP. In exchange, we will make an upfront payment of $300.0 million and BMS may receive up to $410.0 million in additional milestone payments, and potential royalties. We will also assume all remaining obligations to the former stockholders of iPierian, Inc. related to BMS’s acquisition of the company in 2014. We may pay up to $550.0 million in remaining milestones, including a $60.0 million milestone which may become payable in 2017, and potential royalties.

The transaction is subject to customary closing conditions, including the expiration of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 in the U.S., and is expected to close in the second quarter of 2017.

AbbVie Inc.

We have a collaboration agreement with AbbVie Inc. (AbbVie) aimed at advancing the development and commercialization of ZINBRYTA in MS, which was approved for the treatment of relapsing forms of MS in the U.S. in May 2016 and in the E.U. in July 2016. Under the agreement, we and AbbVie conduct ZINBRYTA co-promotion activities in the U.S., E.U. and Canadian territories (Collaboration Territory), where development and commercialization costs and profits are shared equally. Outside of the Collaboration Territory, we are solely responsible for development and commercialization of ZINBRYTA and will pay a tiered royalty to AbbVie as a percentage of net sales in the low to high teens.

Co-promotion Profits and Losses

In the U.S., AbbVie recognizes revenues on sales to third parties and we recognize our 50% share of the co-promotion profits or losses as a component of total revenues in our condensed consolidated statements of income. The collaboration began selling ZINBRYTA in the U.S. in the third quarter of 2016. During the three months ended March 31, 2017 , we recognized a net reduction in revenue of $5.9 million to reflect our share of an overall net loss within the collaboration.

In the E.U. and Canada, we recognize revenues on sales to third parties in product revenues, net in our condensed consolidated statements of income. We also record the related cost of revenues and sales and marketing expenses to their respective line items in our condensed consolidated statements of income as these

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costs are incurred. We reimburse AbbVie for their 50% share of the co-promotion profits or losses in the E.U. and Canada. This reimbursement is recognized in collaboration profit (loss) sharing in our condensed consolidated statements of income. We began to recognize product revenues on sales of ZINBRYTA in the E.U. in the third quarter of 2016. For the three months ended March 31, 2017 , our recognition of income to reflect AbbVie's 50% sharing of the net collaboration losses in the E.U. and Canada was not significant.

Ionis Pharmaceuticals, Inc.

SPINRAZA (nusinersen)

In January 2012 we entered into an exclusive worldwide option and collaboration agreement with Ionis Pharmaceuticals, Inc. (Ionis) under which both companies will develop and commercialize the antisense investigational drug candidate, SPINRAZA, for the treatment of SMA.

Under the terms of the agreement, during the third quarter of 2016, we exercised our option to develop and commercialize SPINRAZA and paid Ionis a $75.0 million license fee in connection with the option exercise. This amount was recognized as research and development expense in our condensed consolidated statements of income. In December 2016 SPINRAZA was approved by the U.S. Food and Drug Administration for the treatment of SMA in pediatric and adult patients in the U.S. triggering a $60.0 million milestone payment due to Ionis, which was capitalized in intangible assets, net in our condensed consolidated balance sheets. This amount was paid during the first quarter of 2017. We may pay Ionis up to approximately $90.0 million in additional milestone payments upon the achievement of certain other regulatory milestones, including approval in the E.U.

For the three months ended March 31, 2017 , we recognized revenues totaling $46.4 million on our sales of SPINRAZA in the U.S. and $1.0 million on our sales of SPINRAZA outside of the U.S. Pursuant to our agreement with Ionis, we will make royalty payments to Ionis on annual worldwide net sales of SPINRAZA using a tiered royalty rate between 11% and 15% .

Samsung Bioepis

Joint Venture Agreement

In February 2012 we entered into a joint venture agreement with Samsung Biologics, establishing an entity, Samsung Bioepis, to develop, manufacture and market biosimilar pharmaceuticals. As of March 31, 2017 , our ownership interest was approximately 6.7% , which reflects the effect of additional equity financings in which we did not participate. We maintain an option to purchase additional stock in Samsung Bioepis that would allow us to increase our ownership percentage up to 49.9% . The exercise of this option is within our control.

We recognize our share of the results of operations related to our investment in Samsung Bioepis one quarter in arrears when the results of the entity become available, which is reflected as equity in loss of investee, net of tax in our condensed consolidated statements of income. During 2015, as our share of losses exceeded the carrying value of our investment, we suspended recognizing additional losses and will continue to do so unless we commit to providing additional funding.

Commercial Agreement

We began to recognize revenue on sales of BENEPALI in the E.U. in the first quarter of 2016 and FLIXABI in the E.U. in the third quarter of 2016. We reflect revenues on sales of BENEPALI and FLIXABI to third parties in product revenues, net in our condensed consolidated statements of income and record the related cost of revenues and sales and marketing expenses in our condensed consolidated statements of income to their respective line items when these costs are incurred. We share 50% of the profit or loss related to our commercial agreement with Samsung Bioepis. This profit share with Samsung Bioepis is recognized in collaboration profit (loss) sharing in our condensed consolidated statements of income. For the three months ended March 31, 2017 , we recognized a net expense of $20.8 million related to the collaboration profit share in our condensed consolidated statements of income.

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Other Services

Simultaneous with the formation of Samsung Bioepis, we also entered into a license agreement, a technical development services agreement and a manufacturing agreement with Samsung Bioepis. For the three months ended March 31, 2017 , we recognized $2.2 million in connection with these services as a component of other revenues in our condensed consolidated statements of income, as compared to $2.7 million in the prior year comparative period.

For additional information related to these and our other significant collaboration arrangements, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in our 2016 Form 10-K.

18. Litigation

We are currently involved in various claims and legal proceedings, including the matters described below. For information as to our accounting policies relating to claims and legal proceedings, including use of estimates and contingencies, please read Note 1, Summary of Significant Accounting Policies, to our consolidated financial statements included in our 2016 Form 10-K.

With respect to some loss contingencies, an estimate of the possible loss or range of loss cannot be made until management has further information, including, for example, (i) which claims, if any, will survive dispositive motion practice; (ii) information to be obtained through discovery; (iii) information as to the parties' damages claims and supporting evidence; (iv) the parties’ legal theories; and (v) the parties' settlement positions.

The claims and legal proceedings in which we are involved also include challenges to the scope, validity or enforceability of the patents relating to our products, pipeline or processes, and challenges to the scope, validity or enforceability of the patents held by others. These include claims by third parties that we infringe their patents. An adverse outcome in any of these proceedings could result in one or more of the following and have a material impact on our business or consolidated results of operations and financial position: (i) loss of patent protection; (ii) inability to continue to engage in certain activities; and (iii) payment of significant damages, royalties, penalties and/or license fees to third parties.

Loss Contingencies

Italian National Medicines Agency

In the fourth quarter of 2011, Biogen Italia SRL received notice from AIFA that sales of TYSABRI after mid-February 2009 exceeded a reimbursement limit established pursuant to a Price Determination Resolution granted by AIFA in December 2006. In June 2014 AIFA approved a resolution affirming that there is no reimbursement limit from and after February 2013. In the first quarter of 2017, we reached an agreement resolving all of AIFA's claims relating to sales of TYSABRI in excess of the reimbursement limit for prior periods for an aggregate repayment of approximately EUR 37.4 million .

For additional information regarding this matter, please read Note 17, Other Consolidated Financial Statement Detail, to our consolidated financial statements included in our 2016 Form 10-K.

Qui Tam Litigation

On July 6, 2015, a qui tam action filed on behalf of the United States and certain states was unsealed by the U.S. District Court for the District of Massachusetts. The action alleges sales and promotional activities in violation of the federal False Claims Act and state law counterparts, and seeks single and treble damages, civil penalties, interest, attorneys’ fees and costs. Our motion to dismiss is pending. The United States has not made an intervention decision. An estimate of the possible loss or range of loss cannot be made at this time.

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BIOGEN INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited, continued)

Securities Litigation

We and certain current and former officers are defendants in In re Biogen Inc. Securities Litigation, filed by a shareholder on August 18, 2015, in the U.S. District Court for the District of Massachusetts. The amended complaint alleges violations of federal securities laws under 15 U.S.C. §78j(b) and §78t(a) and 17 C.F.R. §240.10b-5. The lead plaintiff sought a declaration of the action as a class action, certification as a representative of the class and its counsel as class counsel, and an award of damages, interest and attorneys' fees. On July 1, 2016 the U.S. District Court dismissed the case and in September 2016 denied the plaintiff's motion to vacate the order of dismissal. The plaintiff has appealed. An estimate of the possible loss or range of loss cannot be made at this time.

We and certain current and former officers are also defendants in an action filed by another shareholder on October 20, 2016, in the U.S. District Court for the District of Massachusetts related to the matter described above. The complaint alleges violations of federal securities laws under 15 U.S.C §78j(b) and §78t(a) and 17 C.F.R. §240.10b-5 and seeks a declaration of the action as a class action and an award of damages, interest and attorneys' fees. An estimate of the possible loss or range of loss cannot be made at this time.

Other Matters

Interference Proceeding with Forward Pharma

In April 2015 the U.S. Patent and Trademark Office (USPTO) declared an interference between Forward Pharma’s pending U.S. Patent Application No. 11/576,871 and our U.S. Patent No. 8,399,514 (the '514 patent). The '514 patent includes claims covering the treatment of MS with 480 mg of dimethyl fumarate as provided for in our TECFIDERA label. In March 2017 the USPTO ruled against Forward Pharma. Forward Pharma has announced that it intends to appeal this decision.

For additional information regarding this matter, please read Note 5, Intangibles Assets and Goodwill, to these condensed consolidated financial statements.

Inter Partes Review Petitions and Proceeding

On March 22, 2016, the USPTO instituted inter partes review of the '514 patent on the petition of the Coalition for Affordable Drugs V LLC, an entity associated with a hedge fund. In March 2017 the USPTO ruled against the petitioner. The petitioner has filed a request for rehearing, which is pending.

On April 18, 2016, Swiss Pharma International AG (Swiss Pharma) filed petitions in the USPTO for inter partes review of U.S. Patent Nos. 8,349,321 and, 8,900,577, relating to specific formulations of natalizumab (TYSABRI), and U.S. Patent No. 8,815,236, relating to methods for treating MS and Crohn’s disease using specific formulations of natalizumab (TYSABRI). In October 2016 the USPTO declined to institute proceedings under all three petitions and in February 2017 denied Swiss Pharma's requests for rehearing.

European Patent Office Oppositions

In June 2016 the European Patent Office (EPO) issued a written decision confirming its earlier revocation of our European patent number 2 137 537 (the '537 patent), which we have appealed. The '537 patent includes claims covering the treatment of MS with 480 mg of dimethyl fumarate as provided for in our TECFIDERA label.

The EPO has scheduled a hearing for November 2017 on Biogen’s and others’ oppositions to Forward Pharma’s European Patent No. 2 801 355, which was issued in May 2015 and expires in October 2025. The settlement and license agreement that we entered with Forward Pharma in January 2017 did not resolve the issues pending in this proceeding and we and Forward Pharma intend to permit the EPO and the Technical Board of Appeal and the Enlarged Board of Appeal, as applicable, to make a final determination. For additional information about this matter, please read Note 21, Commitments and Contingencies , to our consolidated financial statements included in our 2016 Form 10-K.

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BIOGEN INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited, continued)

Patent Revocation Matter

Swiss Pharma filed actions in the District Court of The Hague (on January 11, 2016) and the German Patents Court (on March 3, 2016) to invalidate the Dutch and German counterparts of our European Patent Number 1 485 127 (“Administration of agents to treat inflammation”), which was issued in June 2011 and concerns administration of natalizumab (TYSABRI) to treat MS. The patent expires in February 2023. A hearing was held in the Dutch action in February 2017 and the decision is pending. A hearing has been scheduled in the German action for early 2018.

'755 Patent Litigation

On May 28, 2010, Biogen MA Inc. (formerly Biogen Idec MA Inc.) filed a complaint in the U.S. District Court for the District of New Jersey alleging infringement by Bayer Healthcare Pharmaceuticals Inc. (Bayer) (manufacturer, marketer and seller of BETASERON and manufacturer of EXTAVIA), EMD Serono, Inc. (EMD Serono) (manufacturer, marketer and seller of REBIF), Pfizer Inc. (co-marketer of REBIF) and Novartis Pharmaceuticals Corp. (Novartis) (marketer and seller of EXTAVIA) of our U.S. Patent No. 7,588,755 ('755 Patent), which claims the use of interferon beta for immunomodulation or treating a viral condition, viral disease, cancers or tumors. The complaint seeks monetary damages, including lost profits and royalties. Bayer had previously filed a complaint against us in the same court, on May 27, 2010, seeking a declaratory judgment that it does not infringe the '755 Patent and that the patent is invalid, and seeking monetary relief in the form of attorneys' fees, costs and expenses. The court has consolidated the two lawsuits, and we refer to the two actions as the “Consolidated '755 Patent Actions.”

Bayer, Pfizer, Novartis and EMD Serono have all filed counterclaims in the Consolidated '755 Patent Actions seeking declaratory judgments of patent invalidity and non-infringement, and seeking monetary relief in the form of costs and attorneys' fees, and EMD Serono and Bayer have each filed a counterclaim seeking a declaratory judgment that the '755 Patent is unenforceable based on alleged inequitable conduct. Bayer has also amended its complaint to seek such a declaration. Trial has been set for September 2017.

Government Matters

We have learned that state and federal governmental authorities are investigating our sales and promotional practices and have received related subpoenas. We are cooperating with the government.

On March 4, 2016, we received a subpoena from the federal government for documents relating to our relationship with non-profit organizations that provide assistance to patients taking drugs sold by Biogen. We are cooperating with the government.

On July 1, 2016, we received civil investigative demands from the federal government for documents and information relating to our treatment of certain service agreements with wholesalers when calculating and reporting Average Manufacturer Prices in connection with the Medicaid Drug Rebate Program. We are cooperating with the government.

On December 5, 2016, we received a subpoena from the federal government for documents relating to government price reporting, rebate payments and Biogen's co-pay assistance programs for AVONEX, TECFIDERA, TYSABRI and PLEGRIDY. We are cooperating with the government.

On December 29, 2016, we received a civil investigative demand from the federal government for documents and information relating to our relationships with entities providing clinical education and reimbursement support services. We are cooperating with the government.

Product Liability and Other Legal Proceedings

We are also involved in product liability claims and other legal proceedings generally incidental to our normal business activities. While the outcome of any of these proceedings cannot be accurately predicted, we do not believe the ultimate resolution of any of these existing matters would have a material adverse effect on our business or financial condition.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with our condensed consolidated financial statements and accompanying notes beginning on page 5 of this quarterly report on Form 10-Q and our audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2016 ( 2016 Form 10-K).

Executive Summary

Introduction

Biogen is a global biopharmaceutical company focused on discovering, developing, manufacturing and delivering therapies to people living with serious neurological and neurodegenerative diseases.

On February 1, 2017, we completed the spin-off of our hemophilia business, Bioverativ Inc. (Bioverativ), as an independent publicly traded company trading under the symbol "BIVV" on the Nasdaq Global Select Market. The spin-off was accomplished through the distribution of all the then outstanding shares of common stock of Bioverativ to Biogen shareholders, who received one share of Bioverativ common stock for every two shares of Biogen common stock. The separation and distribution was structured to be tax-free for shareholders for federal income tax purposes. Bioverativ will focus on the discovery, development and commercialization of therapies for treatment of hemophilia and other blood disorders, including ELOCTATE for the treatment of hemophilia A and ALPROLIX for the treatment of hemophilia B, and assumed all of our rights and obligations under our collaboration agreement with Swedish Orphan Biovitrum AB (Sobi) and our collaboration and license agreement with Sangamo Biosciences Inc.

Our consolidated results of operations and financial position included in these unaudited condensed consolidated financial statements reflect the financial results of our hemophilia business for all periods through January 31, 2017. For additional information related to the spin-off of our hemophilia business, please read Note 2, Hemophilia Spin-Off, to our condensed consolidated financial statements included in this report.

Our current revenues depend upon continued sales of our principal products and, unless we develop, acquire rights to and commercialize new products and technologies, we may be substantially dependent on sales from our principal products for many years. Further, following the completion of the spin-off of our hemophilia business, our revenues are further reliant and concentrated on sales of our MS products in an increasingly competitive market.

In the longer term, our revenue growth will be dependent upon the successful clinical development, regulatory approval and launch of new commercial products as well as additional indications for our existing products, our ability to obtain and maintain patents and other rights related to our marketed products, assets originating from our research and development efforts and successful execution of external business development opportunities.

Our innovative drug development and commercialization activities are complemented by our biosimilar therapies that expand access to medicines and reduce the cost burden for healthcare systems. We are leveraging our manufacturing capabilities and know-how by developing, manufacturing and marketing biosimilars through Samsung Bioepis, our joint venture with Samsung BioLogics Co. Ltd. (Samsung Biologics). Under our commercial agreement, we market and sell BENEPALI, an etanercept biosimilar referencing ENBREL, and FLIXABI, an infliximab biosimilar referencing REMICADE, in the European Union (E.U.).

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Financial Highlights

Diluted earnings per share attributable to Biogen Inc. was $3.46 for the three months ended March 31, 2017 , representing a decrease of 21.9% over the same period in 2016 .

Our income from operations for the three months ended March 31, 2017 , reflects the following:


•	Total revenues were $2,810.7 million for the first quarter of 2017 , representing an increase of 3.1% over the same period in 2016 .

•

Product revenues, net totaled $2,380.1 million for the first quarter of 2017 , representing an increase of 3.1% over the same period in 2016 . This increase was driven by a 14.3% increase in worldwide TYSABRI revenues and revenues from BENEPALI and SPINRAZA. Product revenues, net for the first quarter of 2017 , compared to the same period in 2016 , were negatively impacted by a decrease in worldwide ALPROLIX and ELOCTATE revenues resulting from the spin-off of our hemophilia business on February 1, 2017.


•	Revenues from anti-CD20 therapeutic programs totaled $340.6 million for the first quarter of 2017 , representing an increase of 3.4% over the same period in 2016 .


•	Other revenues totaled $90.0 million for the first quarter of 2017 , representing an increase of 2.4% over the same period in 2016 .


•	Total cost and expenses totaled $1,786.4 million for the first quarter of 2017 , representing an increase of 32.5% over the same period in 2016 . This increase was primarily driven by the $353.6 million impairment and amortization charges recorded in relation to our intellectual property related to TECFIDERA and a 22.9% increase in cost of sales.

We generated $235.2 million of net cash flows from operations for the three months ended March 31, 2017 . Cash, cash equivalents and marketable securities totaled approximately $5,705.4 million as of March 31, 2017 .

Business Environment

The biopharmaceutical industry and the markets in which we operate are intensely competitive. Many of our competitors are working to develop or have commercialized products similar to those we market or are developing. In addition, the commercialization of certain of our own approved MS products, products of our collaborators and pipeline product candidates may negatively impact future sales of our existing MS products. Our products may also face increased competitive pressures from the introduction of generic versions or biosimilars of existing products and other technologies.

In addition, sales of our products are dependent, in large part, on the availability and extent of coverage, pricing and reimbursement from government health administration authorities, private health insurers and other organizations. Drug prices are under significant scrutiny in the markets in which our products are prescribed. Drug pricing and other health care costs continue to be subject to political and societal pressures.

For additional information related to our competition and pricing risks that could negatively impact our product sales, please read the “Risk Factors” section of this report.

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Key Pipeline and Product Developments

SPINRAZA (nusinersen)

In April 2017 the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency adopted a positive opinion recommending the granting of a marketing authorization in the E.U for SPINRAZA for the treatment of SMA. The CHMP reviewed SPINRAZA under an accelerated assessment procedure, which is a regulatory mechanism to facilitate earlier access to patients for medicines that fulfill unmet medical needs. SPINRAZA is the first treatment for SMA to be recommended by the CHMP for approval in the E.U.

OCREVUS (Ocrelizumab)

In March 2017 the Roche Group announced that the U.S. Food and Drug Administration (FDA) approved OCREVUS for the treatment of RMS and PPMS. Under the terms of our agreement with Genentech, we will receive a tiered royalty on U.S. net sales ranging from 13.5% and increasing up to 24% if annual net sales exceed $900.0 million.

Results of Operations

Revenues

Revenues are summarized as follows:



	For the Three Months Ended March 31,
(In millions, except percentages)	2017				2016
Product revenues:
United States	$	1,631.0	58.0	%	$	1,663.3	61.0	%
Rest of world	749.1		26.7	%	646.1		23.7	%
Total product revenues	2,380.1		84.7	%	2,309.4		84.7	%
Revenues from anti-CD20 therapeutic programs	340.6		12.1	%	329.5		12.1	%
Other revenues	90.0		3.2	%	87.9		3.2	%
Total revenues	$	2,810.7	100.0	%	$	2,726.8	100.0	%

Product Revenues

Product revenues are summarized as follows:



	For the Three Months Ended March 31,
(In millions, except percentages)	2017				2016
Multiple Sclerosis:
TECFIDERA	$	958.2	40.3	%	$	945.9	41.0	%
Interferon*	648.3		27.2	%	670.4		29.0	%
TYSABRI	545.0		23.0	%	477.0		20.6	%
FAMPYRA	20.5		0.9	%	20.2		0.9	%
ZINBRYTA	10.7		0.4	%	—		—	%
Hemophilia:
ELOCTATE	48.4		2.0	%	107.7		4.7	%
ALPROLIX	26.0		1.1	%	75.0		3.2	%
Spinal Muscular Atrophy:
SPINRAZA	47.4		2.0	%	—		—	%
Other Product Revenues:
FUMADERM	9.7		0.4	%	11.4		0.5	%
BENEPALI	65.3		2.7	%	1.8		0.1	%
FLIXABI	0.6		—	%	—		—	%
Total product revenues	$	2,380.1	100.0	%	$	2,309.4	100.0	%

*Interferon includes AVONEX and PLEGRIDY.

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Multiple Sclerosis (MS)

TECFIDERA

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in U.S. TECFIDERA revenues was primarily due to price increases, partially offset by higher discounts and allowances and a 7% decrease in unit sales volume.

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in rest of world TECFIDERA revenues was primarily due to a 14% increase in unit sales volume in existing markets and new markets where we continue to launch the product and expand our presence around the world. These increases were partially offset by pricing reductions in certain European countries.

We anticipate relatively stable demand for TECFIDERA in 2017 on a global basis, with patient growth in our international markets offsetting modest patient declines in the U.S., primarily resulting from increasing competition from additional treatments for MS, including OCREVUS.

Interferon

AVONEX and PLEGRIDY

For the three months ended March 31, 2017 , U.S. AVONEX and PLEGRIDY revenues totaled $400.1 million and $64.7 million, respectively, as compared to $400.0 million and $67.5 million, respectively, in the prior year comparative period.

The decrease in U.S. Interferon revenues was primarily due to an overall 13% decrease in Interferon unit sales volume, which was primarily attributable to patients transitioning to other oral MS therapies, partially offset by price increases.

For the three months ended March 31, 2017 , rest of world AVONEX and PLEGRIDY revenues totaled $136.4 million and $47.1 million, respectively, as compared to $164.1 million and $38.8 million, respectively, in the prior year comparative period.

The decrease in rest of world Interferon revenues was primarily due to an overall 14% decrease in AVONEX unit sales volume primarily due to patients transitioning to other oral MS therapies.

We expect that overall Interferon revenues will continue to decline compared to prior year periods as a result of increasing competition from our other products as well as other treatments for MS.

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TYSABRI

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in U.S. TYSABRI revenues was primarily due to a 4% increase in unit sales volume and price increases, partially offset by higher discounts and allowances.

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in rest of world TYSABRI revenues was primarily due to the recognition of approximately $44.6 million of previously deferred revenue in Italy relating to the pricing agreement with the Italian National Medicines Agency (Agenzia Italiana del Farmaco, or AIFA), as discussed below, and a 14% increase in unit sales volume.

In the first quarter of 2017, we reached an agreement with AIFA's Price and Reimbursement Committee resolving all of AIFA's claims relating to sales of TYSABRI in excess of the reimbursement limit for prior periods for an aggregate repayment of approximately EUR37.4 million.

For information regarding our agreement with AIFA relating to sales of TYSABRI in Italy, please read Note 18, Litigation, to our condensed consolidated financial statements included in this report.

We anticipate relatively stable demand for TYSABRI in 2017 on a global basis, with patient growth in our international markets offsetting modest patient declines in the U.S. primarily resulting from increasing competition from additional treatments for MS, including ZINBRYTA and OCREVUS.

ZINBRYTA

Under the terms of our collaboration agreement with AbbVie Inc. (AbbVie), we began to recognize revenues on sales of ZINBRYTA to third parties in the E.U. in the third quarter of 2016.

For additional information on our relationship with AbbVie, please read Note 17, Collaborative and Other Relationships, to our condensed consolidated financial statements included in this report.

Spinal Muscular Atrophy (SMA)

SPINRAZA

We began to recognize revenues on sales of SPINRAZA in the U.S. in the fourth quarter of 2016 and the rest of world in the first quarter of 2017.

For additional information on our relationship with Ionis, please read Note 17, Collaborative and Other Relationships, to our condensed consolidated financial statements included in this report.

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Biosimilars

Under the terms of our commercial agreement with Samsung Bioepis, we began to recognize revenues on sales of BENEPALI and FLIXABI to third parties in the E.U. in the first and third quarters of 2016, respectively.

For additional information on our relationship with Samsung Bioepis, please read Note 17, Collaborative and Other Relationships, to our condensed consolidated financial statements included in this report.

Revenues from Anti-CD20 Therapeutic Programs

Genentech (Roche Group)

Our share of RITUXAN and GAZYVA operating profits are summarized as follows:

Biogen’s Share of Pre-tax Profits in the U.S. for RITUXAN and GAZYVA

The following tables provide a summary of amounts comprising our share of pre-tax profits on RITUXAN and GAZYVA in the U.S.:



	For the Three Months Ended March 31,
(In millions)	2017		2016
Product revenues, net	$	1,041.0	$	974.7
Cost and expenses	201.3		175.1
Pre-tax profits in the U.S.	839.7		799.6
Biogen's share of pre-tax profits	$	323.5	$	312.7

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in U.S. product revenues was primarily due to selling price increases, an increase in GAZYVA unit sales volume of 26% and an increase in RITUXAN unit sales volume of 1%, partially offset by higher RITUXAN discounts and allowances.

Collaboration costs and expenses for the three months ended March 31, 2017 , compared to the same period in 2016 , increased primarily due to an increase in RITUXAN product cost of sales.

Our share of RITUXAN pre-tax profits in the U.S. decreased to 39% from 40% as GAZYVA was approved by the FDA as a new treatment for follicular lymphoma in February 2016.

Revenue on Sales in the Rest of World for RITUXAN

Revenue on sales in the rest of world for RITUXAN primarily consists of our share of pre-tax co-promotion profits on RITUXAN in Canada. For the three months ended March 31, 2017 , compared to the same period in 2016 , revenues on sales in the rest of world for RITUXAN were relatively consistent.

OCREVUS (Ocrelizumab)

Genentech is solely responsible for development and commercialization of OCREVUS, a humanized anti-CD20 monoclonal antibody, and funding future costs. In March 2017, the FDA approved OCREVUS for the treatment of RMS and PPMS. Under the terms of our agreement with Genentech, we will receive a tiered royalty on U.S. net sales ranging from 13.5% and increasing up to 24% if annual net sales exceed $900.0 million.

Commercialization of OCREVUS will not impact the percentage of the co-promotion profits we receive for RITUXAN or GAZYVA.

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For additional information related to our collaboration with Genentech, including information regarding the pre-tax profit sharing formula and its impact on future revenues from anti-CD20 therapeutic

programs, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in our 2016 Form 10-K.

Other Revenues

Other revenues are summarized as follows:



	For the Three Months Ended March 31,
(In millions, except percentages)	2017				2016
Revenues from collaborative and other relationships	$	6.3	7.0	%	$	11.5	13.1	%
Other royalty and corporate revenues	83.7		93.0	%	76.4		86.9	%
Total other revenues	$	90.0	100.0	%	$	87.9	100.0	%

Revenues from Collaborative and Other Relationships

Revenues from collaborative and other relationships include revenues earned under our 50% share of the co-promotion profits or losses of ZINBRYTA in the U.S. with AbbVie and revenues from our technical development and manufacturing services agreements with Samsung Bioepis. Prior to the spin-off of our hemophilia business, revenues from collaborative and other relationships also included revenues earned under our manufacturing services agreement with Sobi on shipments of ELOCTA and ALPROLIX to Sobi and royalties from Sobi on sales of ELOCTA and ALPROLIX in their territory, which included substantially all of Europe, Russia and certain markets in Northern Africa and the Middle East. Bioverativ assumed all of our rights and obligations under our agreement with Sobi on February 1, 2017.

For the three months ended March 31, 2017 , compared to the same period in 2016 , the decrease in revenues from collaborative and other relationships were primarily due to a net overall loss in the collaboration with AbbVie of $5.9 million within the U.S. territory.

For additional information on our collaboration agreements with Samsung Bioepis and AbbVie, please read Note 17, Collaborative and Other Relationships, to our condensed consolidated financial statements included in this report.

Other Royalty and Corporate Revenues

Royalty Revenues

We receive royalties from net sales on products related to patents that we have out-licensed.

For the three months ended March 31, 2017 , compared to the same period in 2016 , royalty revenues were relatively consistent.

Other Corporate Revenues

Our other corporate revenues include amounts earned under contract manufacturing agreements.

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in other corporate revenues was primarily due to higher contract manufacturing revenues related to drug substance manufacturing provided to a strategic partner.

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Reserves for Discounts and Allowances

Revenues from product sales are recorded net of reserves established for applicable discounts and allowances, including those associated with the implementation of pricing actions in certain international markets where we operate.

These reserves are based on estimates of the amounts earned or to be claimed on the related sales and are classified as reductions of accounts receivable (if the amount is payable to our customer) or a liability (if the amount is payable to a party other than our customer). Our estimates take into consideration our historical experience, current contractual and statutory requirements, specific known market events and trends, industry data and forecasted customer buying and payment patterns. Actual amounts may ultimately differ from our estimates. If actual results vary, we adjust these estimates, which will have an effect on earnings in the period of adjustment.

Reserves for discounts, contractual adjustments and returns that reduced gross product revenues are summarized as follows:

For the three months ended March 31, 2017 , reserves for discounts and allowances as a percentage of gross product revenues were 22.8%, as compared to 21.0% in the prior year comparative period.

Discounts

Discounts include trade term discounts and wholesaler incentives.

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in

discounts was primarily driven by increases in gross

selling prices, partially offset by the impact from the spin-off of our hemophilia business on February 1, 2017.

Contractual Adjustments

Contractual adjustments relate to Medicaid and managed care rebates, co-payment assistance, Veterans Administration, Public Health Service discounts, specialty pharmacy program fees and other government rebates or applicable allowances.

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in contractual adjustments was primarily due to higher Medicaid and other governmental rebates and allowances in the U.S. and managed care rebates, due in part to an increase in gross selling prices, partially offset by the impact from the spin-off of our hemophilia business on February 1, 2017.

Returns

Product return reserves are established for returns made by wholesalers. In accordance with contractual terms, wholesalers are permitted to return product for reasons such as damaged or expired product. The majority of wholesaler returns are due to product expiration. Provisions for product returns are recorded in the period the related revenue is recognized, resulting in a reduction to product sales.

For the three months ended March 31, 2017 , compared to the same period in 2016 , return provisions decreased primarily due to a reduction in U.S. return rates based on recent experiences of returned products.

For additional information related to our reserves, please read Note 3, Reserves for Discounts and Allowances, to our condensed consolidated financial statements included in this report.

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Cost and Expenses

A summary of total cost and expenses is as follows:



	For the Three Months Ended March 31,
(In millions, except percentages)	2017		2016		Change %
Cost of sales, excluding amortization of acquired intangible assets	$	384.6	$	313.0	22.9	%
Research and development	423.4		437.3		(3.2	)%
Selling, general and administrative	499.1		497.3		0.4	%
Amortization of acquired intangible assets	448.5		88.8		405.1	%
Collaboration profit (loss) sharing	20.8		—		**
(Gain) loss on fair value remeasurement of contingent consideration	10.0		2.3		334.8	%
Restructuring charges	—		9.7		(100.0	)%
Total cost and expenses	$	1,786.4	$	1,348.4	32.5	%

** Percentage not meaningful.

Cost of Sales, Excluding Amortization of Acquired Intangible Assets

Product Cost of Sales

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in product cost of sales was primarily driven by higher unit sales volume related to our biosimilar product shipments and inventory amounts written down as a result of excess, obsolescence, unmarketability or other reasons. These increases were partially offset by the impact from the spin-off of our hemophilia business on February 1, 2017.

Royalty Cost of Sales

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in royalty cost of sales was primarily driven by higher royalties on sales of AVONEX and PLEGRIDY in the U.S., as noted below, and the recognition of royalties on sales of SPINRAZA. These increases were partially offset by the impact from the spin-off of our hemophilia business on February 1, 2017.

On June 28, 2016, the U.S. Patent and Trademark Office issued to the Japanese Foundation for Cancer Research (JFCR) a patent related to recombinant interferon-beta protein. This patent, U.S. Patent No. 9,376,478, expires in June 2033, and was issued following an interference proceeding between JFCR and us. This patent is relevant to AVONEX and PLEGRIDY, and we will pay royalties in the mid-single digits in relation to this patent during its life.

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Research and Development

A significant amount of our research and development costs consist of indirect costs incurred in support of overall research and development activities and non-specific programs, including activities that benefit multiple programs, such as management costs, as well as depreciation, information technology and facility-based expenses. These costs are considered other research and development costs in the table above and are not allocated to a specific program or stage.

Research and development expense incurred in support of our marketed products includes costs associated with product lifecycle management activities including, if applicable, costs associated with the development of new indications for existing products. Late stage programs are programs in Phase 3 development or in registration stage. Early stage programs are programs in Phase 1 or Phase 2 development. Research and discovery represents costs incurred to support our discovery research and translational science efforts. Costs are reflected in the development stage based upon the program status when incurred. Therefore, the same program

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could be reflected in different development stages in the same year. For several of our programs, the research and development activities are part of our collaborative and other relationships. Our costs reflect our share of the total costs incurred.

For the three months ended March 31, 2017 , compared to the same period in 2016 , the decrease in research and development expense was primarily related to decreased costs incurred in connection with our early stage programs, marketed products and late stage programs, partially offset by an increase in other research and development.

The decrease in spending associated with our early stage programs for the three months ended March 31, 2017 , compared to the same period in 2016 , was primarily due to the discontinuance of development of amiselimod in the third quarter of 2016 and a reduction in spending of opicinumab in MS, partially offset by increased costs for the advancement of BIIB076 in Alzheimer's disease and BIIB074 in trigeminal neuralgia (TGN).

The decrease in spending associated with our marketed products for the three months ended March 31, 2017 , compared to the same period in 2016 , was primarily due to a reduction in spending of TECFIDERA and the impact from the spin-off of our hemophilia business on February 1, 2017, partially offset by the approvals of ZINBRYTA and SPINRAZA in the third and fourth quarters of 2016, respectively.

The decrease in spending associated with our late stage programs for the three months ended March 31, 2017 , compared to the same period in 2016 , was primarily driven by the approvals of ZINBRYTA and SPINRAZA in the third and fourth quarters of 2016, respectively, partially offset by costs incurred to advance our aducanumab and E2609 programs for Alzheimer's disease.

We intend to continue committing significant resources to targeted research and development opportunities where there is a significant unmet need and where a drug candidate has the potential to be highly differentiated. Specifically, we intend to continue to invest in our Alzheimer's disease programs and MS pipeline.

On April 13, 2017, we entered into an agreement to exclusively license BMS-986168, a Phase 2-ready experimental medicine with potential in Alzheimer's disease and progressive supranuclear palsy (PSP), from Bristol-Myers Squibb Company (BMS). Upon closing we will make an upfront payment of $300.0 million. In addition, a $60.0 million milestone to the former stockholders of iPierian, Inc. may become payable in 2017. The transaction is subject to customary closing conditions, including the

expiration of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 in the U.S., and is expected to close in the second quarter of 2017.

For additional information please read Note 17, Collaborative and Other Relationships, to our condensed consolidated financial statements included in this report.

Selling, General and Administrative

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in selling, general and administrative expenses was primarily due to an increase in corporate giving and an increase in costs associated with developing commercial capabilities for SPINRAZA and our biosimilar candidates, as well as incremental costs incurred directly associated with the set-up and spin- off of our hemophilia business into an independent, publicly-traded company. These increases were offset by a reduction in operational spending associated with our hemophilia business and the discontinuance of our TECFIDERA television advertising campaign in the second quarter of 2016.

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Amortization of Acquired Intangible Assets

Our amortization expense is based on the economic consumption and impairment of intangible assets. Our most significant intangible assets are related to our AVONEX and TYSABRI products. Annually, during our long-range planning cycle, we perform an analysis of anticipated lifetime revenues of AVONEX and TYSABRI. This analysis is also updated whenever we determine events or changes in circumstances would significantly affect the anticipated lifetime revenues of either product.

Our most recent long range planning cycle was updated in the third quarter of 2016 . Based upon this analysis, there was not a significant net change in our expected rate of amortization for acquired intangible assets.

We monitor events and expectations regarding product performance. If new information indicates that the assumptions underlying our most recent analysis are substantially different than those utilized in our current estimates, our analysis would be updated and may result in a significant change in the anticipated lifetime revenues of the relevant process. The occurrence of an adverse event could substantially increase the amount of amortization expense associated with our acquired intangible assets as compared to previous periods or our current expectations, which may result in a significant negative impact on our future results of operations.

Amortization of acquired intangible assets for the three months ended March 31, 2017 , includes $353.6 million of impairment and amortization charges associated with our U.S. and rest of world licenses to Forward Pharma A/S's (Forward Pharma) intellectual property related to TECFIDERA acquired in the first quarter of 2017, as discussed further below.

TECFIDERA License Rights

In January 2017 we entered into a settlement and license agreement. Pursuant to this agreement, we obtained U.S. and rest of world licenses to Forward Pharma's intellectual property, including Forward Pharma's intellectual property related to TECFIDERA. In exchange, we paid Forward Pharma $1.25 billion in cash. During the fourth quarter of 2016, we recognized a pre-tax charge of $454.8 million and in the first quarter of 2017 we recognized an intangible asset of $795.2 million related to this agreement. The pre-tax charge recognized in the fourth quarter of 2016 represented the fair value of our licenses to Forward Pharma’s intellectual property for the period April 2014, when we started selling TECFIDERA, through December 31, 2016. The intangible asset represented the fair value of the U.S. and rest of world licenses to Forward Pharma’s intellectual property related to TECFIDERA revenues for the period January 2017, the month in which we entered into the agreement, through December 2020, the last month before royalty payments could first commence pursuant to the agreement.

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In Process Research & Development (IPR&D)

Overall, the value of our acquired IPR&D assets is dependent upon a number of variables, including estimates of future revenues and the effects of competition, the level of anticipated development costs and the probability and timing of successfully advancing a particular research program from a clinical trial phase to the next. We are continually reevaluating our estimates concerning these variables and evaluating industry data regarding the productivity of clinical research and the development process. Changes in our estimates of items may result in a significant change to our valuation of these assets.

The field of developing treatments for forms of neuropathic pain, such as TGN and idiopathic pulmonary fibrosis (IPF) are highly competitive and can be affected by changes to expected market candidates and changes in timing and the clinical development of our product candidates. There can be no assurance that we will be able to successfully develop BIIB074 for the treatment of TGN or STX-100 for the treatment of IPF, or other indications or that a successfully developed therapy will be able to secure sufficient pricing in a competitive market. Changes to clinical development plans, life cycle management strategies and changes in program economics, including foreign currency exchange rates, are evaluated regularly. We review amounts capitalized as acquired IPR&D for impairment at least annually, as of October 31, and whenever events or changes in circumstances indicate to us that the carrying value of the assets might not be recoverable. Our most recent impairment assessment as of October 31, 2016 resulted in no impairments.

For additional information related to the amortization of acquired intangible assets and our TECFIDERA settlement and license agreement please read Note 5, Intangible Assets and Goodwill, to our condensed consolidated financial statements included in this report.

Collaboration Profit (Loss) Sharing

Collaboration profit (loss) reflects the sharing of 50% of the profit or loss related to our biosimilars commercial agreement with Samsung Bioepis and our 50% sharing of the co-promotion profits or losses in the E.U. and Canada related to our collaboration agreement with AbbVie in the commercialization of ZINBRYTA.

We began to recognize revenues on sales of biosimilars in the first quarter of 2016. For the three months ended March 31, 2017 , we shared collaboration profits and therefore recognized net expense of $20.8 million related to our biosimilars commercial agreement with Samsung Bioepis.

We began to recognize revenues on sales of ZINBRYTA in the E.U. in the third quarter of 2016. For the three months ended March 31, 2017 , our recognition of income to reflect AbbVie's 50% sharing of the net collaboration losses in the E.U. and Canada was not significant.

For additional information related to our agreements with Samsung Bioepis and AbbVie please read Note 17, Collaborative and Other Relationships, to our condensed consolidated financial statements included in this report.

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Other Income (Expense), Net

For the three months ended March 31, 2017 , compared to the same period in 2016 , the change in other income (expense), net was primarily due to an increase in interest income and the impact of foreign currency exchange gains recorded in the first quarter of 2017, compared to the prior year comparative period.

Income Tax Provision

Our effective tax rate fluctuates from year to year due to the global nature of our operations. The factors that most significantly impact our effective tax rate include variability in the allocation of our taxable earnings among multiple jurisdictions, changes in tax laws, the amount and characterization of our research and development expenses, the levels of certain deductions and credits, acquisitions and licensing transactions.

For more information on our uncertain tax positions and income tax rate reconciliation for the three months ended March 31, 2017 and 2016 , please read Note 14, Income Taxes, to our condensed consolidated financial statements included in this report.

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Financial Condition, Liquidity and Capital Resources

Our financial condition is summarized as follows:



(In millions, except percentages)	As of March 31, 2017			As of December 31, 2016			Change %
Financial assets:
Cash and cash equivalents	$	924.0		$	2,326.5		(60.3	)%
Marketable securities — current	1,956.2			2,568.6			(23.8	)%
Marketable securities — non-current	2,825.2			2,829.4			(0.1	)%
Total cash, cash equivalents and marketable securities	$	5,705.4		$	7,724.5		(26.1	)%
Borrowings:
Current portion of notes payable and other financing arrangements	$	561.5		$	4.7		**
Notes payable and other financing arrangements	5,952.7			6,512.7			(8.6	)%
Total borrowings	$	6,514.2		$	6,517.4		—	%
Working capital:
Current assets	$	6,859.7		$	8,732.2		(21.4	)%
Current liabilities	(2,992.5		)	(3,419.9		)	(12.5	)%
Total working capital	$	3,867.2		$	5,312.3		(27.2	)%

** Percentage not meaningful.

For the three months ended March 31, 2017 , certain significant cash flows were as follows:


•	$235.2 million in net cash flows provided by operating activities, including:


◦	$454.8 million payment made to Forward Pharma for the litigation and settlement charges that were accrued as of December 31, 2016; and


◦	$360.0 million in total payments for income taxes;


•	$795.2 million payment made to Forward Pharma to license intellectual property related to TECFIDERA ;


•	$583.6 million used for share repurchases;


•	$302.7 million net cash contribution made to Bioverativ;


•	$300.0 million in contingent payments made to former shareholders of Fumapharm AG and holders of their rights; and


•	$210.0 million used for purchases of property, plant and equipment.

For the three months ended March 31, 2016 , certain significant cash flows were as follows:


•	$1,015.8 million in net cash flows provided by operating activities, including:


◦	$97.2 million in total payments for income taxes;


•	$300.0 million in contingent payments made to former shareholders of Fumapharm AG and holders of their rights; and


•	$126.9 million used for purchases of property, plant and equipment.

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Overview

We have historically financed our operating and capital expenditures primarily through cash flows earned through our operations. We expect to continue funding our current and planned operating requirements principally through our cash flows from operations, as well as our existing cash resources. We believe that our existing funds, when combined with cash generated from operations and our access to additional financing resources, if needed, are sufficient to satisfy our operating, working capital, strategic alliance, milestone payment, capital expenditure and debt service requirements for the foreseeable future. In addition, we may choose to opportunistically return cash to shareholders and pursue other business initiatives, including acquisition and licensing activities. We may, from time to time, also seek additional funding through a combination of new collaborative agreements, strategic alliances and additional equity and debt financings or from other sources should we identify a significant new opportunity.

The undistributed cumulative foreign earnings of certain of our foreign subsidiaries, exclusive of earnings that would result in little or no net income tax expense under current U.S. tax law or which has already been subject to tax under U.S. tax law, are invested indefinitely outside the U.S.

Of the total cash, cash equivalents and marketable securities at March 31, 2017 , approximately $4.3 billion was generated in foreign jurisdictions and is primarily intended for use in our foreign operations or in connection with business development transactions outside the U.S. In managing our day-to-day liquidity in the U.S., we do not rely on the unrepatriated earnings as a source of funds and we have not provided for U.S. federal or state income taxes on these undistributed foreign earnings.

For additional information related to certain risks that could negatively impact our financial position or future results of operations, please read the “ Risk Factors ” and “ Quantitative and Qualitative Disclosures About Market Risk ” sections of this report.

Share Repurchase Programs

From April 1, 2017 through April 25, 2017, we repurchased and expect to retire approximately 2.0 million shares of common stock at a cost of $542.5 million under our 2016 Share Repurchase Program. As of April 25, 2017, approximately $3.2 billion remains available to repurchase shares under this program.

Cash, Cash Equivalents and Marketable Securities

Until required for another use in our business, we typically invest our cash reserves in bank deposits, certificates of deposit, commercial paper, corporate notes, U.S. and foreign government instruments and other interest bearing marketable debt instruments in accordance with our investment policy. It is our policy to mitigate credit risk in our cash reserves and marketable securities by maintaining a well-diversified portfolio that limits the amount of exposure as to institution, maturity and investment type.

The net decrease in cash, cash equivalents and marketable securities at March 31, 2017 from December 31, 2016 was primarily due to the payment made to Forward Pharma in connection with our January 2017 settlement and license agreement, cash used for share repurchases, the net cash contribution made to Bioverativ, contingent payments made to former shareholders of Fumapharm AG and holders of their rights and net purchases of property, plant and equipment. These cash outflows were partially offset by cash flows provided by operating activities.

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Borrowings

The following is a summary of our principal indebtedness:


•	$550.0 million aggregate principal amount of 6.875% Senior Notes due March 1, 2018;


•	$1.5 billion aggregate principal amount of 2.90% Senior Notes due September 15, 2020;


•	$1.0 billion aggregate principal amount of 3.625% Senior Notes due September 15, 2022;


•	$1.75 billion aggregate principal amount of 4.05% Senior Notes due September 15, 2025; and


•	$1.75 billion aggregate principal amount of 5.20% Senior Notes due September 15, 2045.

These senior unsecured notes were issued at a discount and are amortized as additional interest expense over the period from issuance through maturity.

During the third quarter of 2015, we entered into a $1.0 billion, 5-year senior unsecured revolving credit facility under which we are permitted to draw funds for working capital and general corporate purposes. The terms of the revolving credit facility include a financial covenant that requires us not to exceed a maximum consolidated leverage ratio. As of March 31, 2017 , we had no outstanding borrowings and were in compliance with all covenants under this facility.

For a summary of the fair and carrying values of our outstanding borrowings as of March 31, 2017 and December 31, 2016 , please read Note 6, Fair Value Measurements, to our condensed consolidated financial statements included in this report.

Working Capital

We define working capital as current assets less current liabilities. The decrease in working capital at March 31, 2017 from December 31, 2016 reflects a decrease in total current assets of $1.9 billion, partially offset by a $427.4 million decrease in current liabilities.

The decrease in total current assets was driven by a decrease in cash and cash equivalents and short-term marketable securities, as described above, and the contribution of certain accounts receivable, inventory, and other current assets to Bioverativ. These decreases were partially offset by an increase in accounts receivable related to our ongoing operations.

The decrease in current liabilities was driven by a reduction in accrued expenses primarily due to the payment of the $454.8 million charge that was accrued as of December 31, 2016 in relation to our settlement and license agreement with Forward Pharma and the payment of incentive compensation. These decreases were partially offset by the reclassification to current liabilities of $550.0 million of our 6.875% Senior Notes due March 1, 2018, as these notes are now due within one year.

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Cash Flows

The following table summarizes our cash flow activity:



	For the Three Months Ended March 31,
(In millions, except percentages)	2017			2016			% Change
Net cash flows provided by operating activities	$	235.2		$	1,015.8		(76.8	)%
Net cash flows used in investing activities	$	(744.2	)	$	(1,203.2	)	(38.1	)%
Net cash flows used in financing activities	$	(901.4	)	$	(5.0	)	17,928.0	%

Operating Activities

Cash flows from operating activities represent the cash receipts and disbursements related to all of our activities other than investing and financing activities. We expect cash provided from operating activities will continue to be our primary source of funds to finance operating needs and capital expenditures for the foreseeable future.

Operating cash flow is derived by adjusting our net income for:


•	Non-cash operating items such as depreciation and amortization, impairment charges and share-based compensation charges;


•	Changes in operating assets and liabilities which reflect timing differences between the receipt and payment of cash associated with transactions and when they are recognized in results of operations; and


•	Changes associated with the fair value of contingent payments associated with our acquisitions of businesses and payments related to collaborations.

For the three months ended March 31, 2017 , compared to the same period in 2016 , the decrease in net cash flows provided by operating activities was primarily due to the $454.8 million payment that was accrued as of December 31, 2016, in relation to our settlement and license agreement with Forward Pharma, and an increase in net payments for income taxes of approximately $263.0 million over the prior year comparative period.

Investing Activities

For the three months ended March 31, 2017 , compared to the same period in 2016 , the decrease in net cash flows used in investing activities was primarily due to an increase in net proceeds from sales of marketable securities, partially offset by the $795.2 million payment made to license Forward Pharma's intellectual property related to TECFIDERA, the $60.0 million milestone paid to Ionis and an increase in purchases of property, plant and equipment primarily related to the construction of our Solothurn, Switzerland facility.

Financing Activities

For the three months ended March 31, 2017 , compared to the same period in 2016 , the increase in net cash flows used by financing activities was primarily due to $583.6 million of cash used for share repurchases and the $302.7 million net cash contribution made to Bioverativ in connection with the spin-off of our hemophilia business.

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Contractual Obligations and Off-Balance Sheet Arrangements

Contractual Obligations

Our contractual obligations primarily consist of our obligations under non-cancellable operating leases, capital leases, long-term debt obligations and defined benefit and other purchase obligations, excluding amounts related to uncertain tax positions, funding commitments, contingent development, regulatory and commercial milestone payments, TYSABRI contingent payments and contingent consideration related to our business combinations, as described below.

There have been no material changes in our contractual obligations since December 31, 2016 .

TYSABRI Contingent Payments

In 2013 we acquired from Elan Corporation plc (Elan) full ownership of all remaining rights to TYSABRI that we did not already own or control. Under the terms of the acquisition agreement, we are obligated to make contingent payments to Elan of 18% on annual worldwide net sales up to $2.0 billion and 25% on annual worldwide net sales that exceed $2.0 billion. Royalty payments to Elan and other third parties are recognized as cost of sales in our condensed consolidated statements of income. Elan was acquired by Perrigo Company plc (Perrigo) in December 2013, and Perrigo subsequently sold its rights to these payments to another third party effective January 2017.

Contingent Consideration related to Business Combinations

In connection with our acquisitions of Convergence, Stromedix, Inc. (Stromedix) and Biogen International Neuroscience GmbH (BIN), formerly Panima Pharmaceuticals AG, we agreed to make additional payments based upon the achievement of certain milestone events.

As the acquisitions of Convergence, Stromedix and BIN occurred after January 1, 2009, we record contingent consideration liabilities at their fair value on the acquisition date and revalue these obligations each reporting period.

We may pay up to approximately $1.2 billion in remaining milestones related to these acquisitions.

Fumapharm AG

In 2006 we acquired Fumapharm AG. As part of this acquisition we acquired FUMADERM and TECFIDERA (together, Fumapharm Products). We are required to make contingent payments to former shareholders of Fumapharm AG or holders of their rights based on the attainment of certain cumulative sales levels of Fumapharm Products and the level of total net sales of Fumapharm Products in the prior 12 month period.

During the three months ended March 31, 2017 , we paid $300.0 million in contingent payments as we reached the $11.0 billion cumulative sales level related to the Fumapharm Products in the fourth quarter of 2016 and accrued $300.0 million upon reaching $12.0 billion in total cumulative sales of Fumapharm Products in the first quarter of 2017 .

We will owe an additional $300.0 million contingent payment for every additional $1.0 billion in cumulative sales level of Fumapharm Products reached if the prior 12 months sales of the Fumapharm Products exceed $3.0 billion , until such time as the cumulative sales level reaches $20.0 billion , at which time no further contingent payments will be due. If the prior 12 months sales of Fumapharm Products are less than $3.0 billion , contingent payments remain payable on a decreasing tiered basis. These payments would be accounted for as an increase to goodwill as incurred, in accordance with the accounting standard applicable to business combinations when we acquired Fumapharm AG. Any portion of the payment that is tax deductible will be recorded as a reduction to goodwill. Payments are due within 60 days following the end of the quarter in which the applicable cumulative sales level has been reached.

Contingent Development, Regulatory and Commercial Milestone Payments

Based on our development plans as of March 31, 2017 , we could make potential future milestone payments to third parties of up to approximately $2.7 billion, including approximately $0.4 billion in development milestones, approximately $0.7 billion in regulatory milestones and approximately $1.6 billion in commercial milestones, as part of our various collaborations, including licensing and development programs. Payments under these agreements generally become due and payable upon achievement of certain development, regulatory or commercial milestones. Because the achievement of these milestones had not occurred as of March 31, 2017 , such contingencies have not been recorded in our financial statements. Amounts related to contingent milestone payments are not considered contractual obligations as they are contingent on the

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successful achievement of certain development, regulatory approval or commercial milestones.

We anticipate that we may pay approximately $138.0 million of milestone payments during the remainder of 2017 , provided various development, regulatory or commercial milestones are achieved.

On April 13, 2017, we entered into an agreement to exclusively license BMS-986168, a Phase 2-ready experimental medicine with potential in Alzheimer's disease and PSP, from BMS. In exchange, we will make an upfront payment of $300.0 million and BMS may receive up to $410.0 million in additional milestone payments, and potential royalties. We will also assume all remaining obligations to the former stockholders of iPierian, Inc. related to BMS’s acquisition of the company in 2014. We may pay up to $550.0 million in remaining milestones, including a $60.0 million milestone, which may become payable in 2017, and potential royalties. The transaction is subject to customary closing conditions, including the expiration of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 in the U.S., and is expected to close in the second quarter of 2017.

For additional information please read Note 17, Collaborative and Other Relationships, to our condensed consolidated financial statements included in this report.

Other Funding Commitments

As of March 31, 2017 , we have several ongoing clinical studies in various clinical trial stages. Our most significant clinical trial expenditures are to contract research organizations (CROs). The contracts with CROs are generally cancellable, with notice, at our option. We recorded accrued expenses of approximately $30.0 million in our condensed consolidated balance sheet for expenditures incurred by CROs as of March 31, 2017 . We have approximately $460.0 million in cancellable future commitments based on existing CRO contracts as of March 31, 2017 .

Tax Related Obligations

We exclude liabilities pertaining to uncertain tax positions from our summary of contractual obligations as we cannot make a reliable estimate of the period of cash settlement with the respective taxing authorities. As of March 31, 2017 , we have approximately $40.0 million of liabilities associated with uncertain tax positions.

Other Off-Balance Sheet Arrangements

We do not have any relationships with entities often referred to as structured finance or special purpose entities that were established for the purpose of facilitating off-balance sheet arrangements. As such, we are not exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in such relationships. We consolidate variable interest entities if we are the primary beneficiary.

New Accounting Standards

For a discussion of new accounting standards please read Note 1, Summary of Significant Accounting Policies - New Accounting Pronouncements, to our condensed consolidated financial statements included in this report.

Critical Accounting Estimates

The preparation of our condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the U.S. (U.S. GAAP), requires us to make estimates, judgments and assumptions that may affect the reported amounts of assets, liabilities, equity, revenues and expenses and related disclosure of contingent assets and liabilities. On an ongoing basis we evaluate our estimates, judgments and methodologies. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable, the results of which form the basis for making judgments about the carrying values of assets, liabilities and equity and the amount of revenues and expenses. Actual results may differ from these estimates under different assumptions or conditions.

For a discussion of our critical accounting estimates, please read Part II, Item 7 “ Management’s Discussion and Analysis of Financial Condition and Results of Operations ” of our 2016 Form 10-K. There have been no material changes to these critical accounting estimates since our 2016 Form 10-K.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

Market Risk

We are subject to certain risks which may affect our results of operations, cash flows and fair values of assets and liabilities, including volatility in foreign currency exchange rates, interest rate movements, pricing pressures worldwide and weak economic conditions in the foreign markets in which we operate. We manage the impact of foreign currency exchange rates and interest rates through various financial instruments, including derivative instruments such as foreign currency forward contracts, interest rate lock contracts and interest rate swap contracts. We do not enter into financial instruments for trading or speculative purposes. The counter-parties to these contracts are major financial institutions and there is no significant concentration of exposure with any one counter-party.

Foreign Currency Exchange Risk

Our results of operations are subject to foreign currency exchange rate fluctuations due to the global nature of our operations. We have operations or maintain distribution relationships in the U.S., Europe, Canada, Asia, and Central and South America. In addition, we recognize our share of pre-tax co-promotion profits on RITUXAN in Canada. As a result, our financial position, results of operations and cash flows can be affected by market fluctuations in foreign currency exchange rates, primarily with respect to the Euro, British pound sterling, Canadian dollar, Swiss franc, Danish krone and Japanese yen.

While the financial results of our global activities are reported in U.S. dollars, the functional currency for most of our foreign subsidiaries is their respective local currency. Fluctuations in the foreign currency exchange rates of the countries in which we do business will affect our operating results, often in ways that are difficult to predict. In particular, as the U.S. dollar strengthens versus other currencies, the value of the non-U.S. revenue will decline when reported in U.S. dollars. The impact to net income as a result of a strengthening U.S. dollar will be partially mitigated by the value of non-U.S. expense which will also decline when reported in U.S. dollars. As the U.S. dollar weakens versus other currencies, the value of the non-U.S. revenue and expenses will increase when reported in U.S. dollars.

We have established revenue and operating expense hedging and balance sheet risk management programs to protect against volatility of future foreign currency cash flows and changes in fair value caused by volatility in foreign currency exchange rates.

In June 2016 the U.K. voted in a referendum to voluntarily depart from the E.U., known as Brexit, and in March 2017, the U.K. formally started the process for the U.K. to leave the E.U. The macroeconomic impact on our results of operations from these developments remains unknown. To date, the foreign currency exchange impact has been negligible since we hedged the balance sheet foreign currency exchange risk.

Revenue and Operating Expense Hedging Program

Our foreign currency hedging program is designed to mitigate, over time, a portion of the impact resulting from volatility in exchange rate changes on revenues and operating expenses. We use foreign currency forward contracts to manage foreign currency risk, with the majority of our forward contracts used to hedge certain forecasted revenue and operating expense transactions denominated in foreign currencies in the next 18 months . We do not engage in currency speculation. For a more detailed disclosure of our revenue and operating expense hedging program, please read Note 8, Derivative Instruments, to our condensed consolidated financial statements included in this report.

Our ability to mitigate the impact of exchange rate changes on revenues and net income diminishes as significant exchange rate fluctuations are sustained over extended periods of time. In particular, devaluation or significant deterioration of foreign currency exchange rates are difficult to mitigate and likely to negatively impact earnings. The cash flows from these contracts are reported as operating activities in our condensed consolidated statements of cash flows.

Balance Sheet Risk Management Hedging Program

We also use forward contracts to mitigate the foreign currency exposure related to certain balance sheet items. The primary objective of our balance sheet risk management program is to mitigate the exposure of foreign currency denominated net monetary assets of foreign affiliates. In these instances, we principally utilize currency forward contracts. We have not elected hedge accounting for the balance sheet related items. The cash flows from these contracts are reported as operating activities in our condensed consolidated statement of cash flows.

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The following quantitative information includes the impact of currency movements on forward contracts used in our revenue, operating expense and balance sheet hedging programs. As of March 31, 2017 and December 31, 2016 , a hypothetical adverse 10% movement in foreign currency rates compared to the U.S. dollar across all maturities would result in a hypothetical decrease in the fair value of forward contracts of approximately $174.0 million and $172.0 million, respectively. The estimated fair value change was determined by measuring the impact of the hypothetical exchange rate movement on outstanding forward contracts. Our use of this methodology to quantify the market risk of such instruments is subject to assumptions and actual impact could be significantly different. The quantitative information about market risk is limited because it does not take into account all foreign currency operating transactions.

Interest Rate Risk

Our investment portfolio includes cash equivalents and short-term investments. The fair value of our marketable securities is subject to change as a result of potential changes in market interest rates. The potential change in fair value for interest rate sensitive instruments has been assessed on a hypothetical 100 basis point adverse movement across all maturities. As of March 31, 2017 and December 31, 2016 , we estimate that such hypothetical 100 basis point adverse movement would result in a hypothetical loss in fair value of approximately $47.0 million and $50.0 million, respectively, to our interest rate sensitive instruments. The fair values of our investments were determined using third-party pricing services or other market observable data.

To achieve a desired mix of fixed and floating interest rate debt, we entered into interest rate swap contracts during 2015 for certain of our fixed-rate debt. These derivative contracts effectively converted a fixed-rate interest coupon to a floating-rate LIBOR-based coupon over the life of the respective note. As of March 31, 2017 and December 31, 2016 , a 100 basis-point adverse movement (increase in LIBOR) would increase annual interest expense by approximately $6.8 million.

Pricing Pressure

Governments in some international markets in which we operate have implemented measures aimed at reducing healthcare costs to limit the overall level of government expenditures. These implemented measures vary by country and include, among other things, mandatory rebates and discounts, prospective and possible retroactive price reductions and suspensions on price increases of pharmaceuticals.

In addition, certain countries set prices by reference to the prices in other countries where our products are marketed. Thus, our inability to secure favorable prices in a particular country may impair our ability to obtain acceptable prices in existing and potential new markets, which may limit market growth. The continued implementation of pricing actions throughout Europe may also lead to higher levels of parallel trade.

In the U.S., federal and state legislatures, health agencies and third-party payors continue to focus on containing the cost of health care. Legislative and regulatory proposals, enactments to reform health care insurance programs and increasing pressure from social sources could significantly influence the manner in which our products are prescribed and purchased. It is possible that additional federal health care reform measures will be adopted in the future, which could result in increased pricing pressure and reduced reimbursement for our products and otherwise have an adverse impact on our financial position or results of operations.

Our products are also susceptible to increasing competition from generics and biosimilars in many markets. Generic versions of drugs and biosimilars are likely to be sold at substantially lower prices than branded products. Accordingly, the introduction of generic or biosimilar versions of our marketed products, as well as lower-priced competing products likely would significantly reduce both the price that we receive for such marketed products and the volume of products that we sell, which may have an adverse impact on our results of operations.

There is also significant economic pressure on state budgets that may result in states increasingly seeking to achieve budget savings through mechanisms that limit coverage or payment for our drugs. Managed care organizations are also continuing to seek price discounts and, in some cases, to impose restrictions on the coverage of particular drugs.

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Credit Risk

We are subject to credit risk from our accounts receivable related to our product sales. The majority of our accounts receivable arise from product sales in the U.S. and Europe with concentrations of credit risk limited due to the wide variety of customers and markets using our products, as well as their dispersion across many different geographic areas. Our accounts receivable are primarily due from wholesale distributors, public hospitals and other government entities. We monitor the financial performance and creditworthiness of our customers so that we can properly assess and respond to changes in their credit profile. We operate in certain countries where weakness in economic conditions can result in extended collection periods. We continue to monitor these conditions, including the volatility associated with international economies and the relevant financial markets, and assess their possible impact on our business. To date, we have not experienced any significant losses with respect to the collection of our accounts receivable.

Credit and economic conditions in the E.U. continue to remain uncertain, which has, from time to time, led to long collection periods for our accounts receivable and greater collection risk in certain countries.

We believe that our allowance for doubtful accounts was adequate as of March 31, 2017 and December 31, 2016 . However, if significant changes occur in the availability of government funding or the reimbursement practices of these or other governments, we may not be able to collect on amounts due to us from customers in such countries and our results of operations could be adversely affected.

Item 4. Controls and Procedures

Disclosure Controls and Procedures and Internal Control over Financial Reporting

Controls and Procedures

We have carried out an evaluation, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended), as of March 31, 2017 . Based upon that evaluation, our principal executive officer and principal financial officer concluded that, as of the end of the period covered by this report, our disclosure controls and procedures are effective in ensuring that (a) the information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities Exchange Commission’s rules and forms, and (b) such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating our disclosure controls and procedures, our management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and our management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended March 31, 2017 , that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Part II — OTHER INFORMATION

Item 1. Legal Proceedings

Please refer to Note 18, Litigation, to our condensed consolidated financial statements included in this report, which is incorporated into this item by reference.

Item 1A. Risk Factors

We are substantially dependent on revenues from our principal products.

Our current revenues depend upon continued sales of our principal products, and, unless we develop or acquire rights to new products and technologies, we may be substantially dependent on sales from our principal products for many years. Further, following the completion of the spin-off of our hemophilia business, our revenues are further reliant and concentrated on sales of our MS products in an increasingly competitive market, and revenue from sales of our product for SMA. Any of the following negative developments relating to any of our principal products may adversely affect our revenues and results of operations or could cause a decline in our stock price:


•	safety or efficacy issues;


•	the introduction or greater acceptance of competing products, including lower-priced competing products;


•	constraints and additional pressures on product pricing or price increases, including those resulting from governmental or regulatory requirements, increased competition, or changes in, or, implementation of, reimbursement policies and practices of payors and other third parties; or


•	adverse legal, administrative, regulatory or legislative developments.

SPINRAZA was recently approved by the FDA, and is in the early stages of commercial launch. In addition to risks associated with new product launches and the other factors described in these “ Risk Factors ”, our ability to successfully commercialize SPINRAZA may be adversely affected due to:


•	our limited marketing experience within the SMA market, which may impact our ability to develop relationships with the associated medical and scientific community;


•	the lack of readiness of healthcare providers to treat patients with SMA;


•	the effectiveness of our commercial strategy for marketing SPINRAZA; and


•	our ability to maintain a positive reputation among patients, healthcare providers and others in the SMA community, which may be impacted by pricing and reimbursement decisions relating to SPINRAZA.

If we fail to compete effectively, our business and market position would suffer.

The biopharmaceutical industry and the markets in which we operate are intensely competitive. We compete in the marketing and sale of our products, the development of new products and processes, the acquisition of rights to new products with commercial potential and the hiring and retention of personnel. We compete with biotechnology and pharmaceutical companies that have a greater number of products on the market and in the product pipeline, greater financial and other resources and other technological or competitive advantages. One or more of our competitors may benefit from significantly greater sales and marketing capabilities, may develop products that are accepted more widely than ours or may receive patent protection that dominates, blocks or adversely affects our product development or business.

Our products are also susceptible to increasing competition from generics and biosimilars in many markets. Generic versions of drugs and biosimilars are likely to be sold at substantially lower prices than branded products. Accordingly, the introduction of generic or biosimilar versions of our marketed products, as well as lower-priced competing products, likely would significantly reduce both the price that we receive for such marketed products and the volume of products that we sell, which may have an adverse impact on our results of operations.

In the MS market, we face intense competition as the number of products and competitors continues to expand. Due to our significant reliance on sales of our MS products, our business may be harmed if we are unable to successfully compete in the MS market. More specifically, our ability to compete, maintain and grow our share in the MS market may be adversely affected due to a number of factors, including:

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•	the introduction of more efficacious, safer, less expensive or more convenient alternatives to our MS products, including our own products and products of our collaborators;


•	the introduction of lower-cost biosimilars, follow-on products or generic versions of branded MS products sold by our competitors, and the possibility of future competition from generic versions or prodrugs of existing therapeutics or from off-label use by physicians of therapies indicated for other conditions to treat MS patients;


•	patient dynamics, including the size of the patient population and our ability to attract new patients to our therapies;


•	damage to physician and patient confidence in any of our MS products or to our sales and reputation as a result of label changes or adverse experiences or events that may occur with patients treated with our MS products;


•	inability to obtain appropriate pricing and reimbursement for our MS products compared to our competitors in key international markets; or


•	our ability to obtain and maintain patent, data or market exclusivity for our MS products.

Sales of our products depend, to a significant extent, on adequate coverage, pricing and reimbursement from third-party payors, which are subject to increasing and intense pressure from political, social, competitive and other sources. Our inability to maintain adequate coverage, or a reduction in pricing or reimbursement, could have an adverse effect on our business, revenues and results of operations, and could cause a decline in our stock price.

Sales of our products are dependent, in large part, on the availability and extent of coverage, pricing and reimbursement from government health administration authorities, private health insurers and other organizations. When a new pharmaceutical product is approved, the availability of government and private reimbursement for that product may be uncertain, as is the pricing and amount for which that product will be reimbursed.

Pricing and reimbursement for our products may be adversely affected by a number of factors, including:


•	changes in, and implementation of, federal, state or foreign government regulations or private third-party payors' reimbursement policies;


•	pressure by employers on private health insurance plans to reduce costs; and

•

consolidation and increasing assertiveness of payors, including managed care organizations, health insurers, pharmacy benefit managers, government health administration authorities, private health insurers and other organizations, seeking price discounts or rebates in connection with the placement of our products on their formularies and, in some cases, the imposition of restrictions on access or coverage of particular drugs or pricing determined based on perceived value.

Our ability to set the price for our products can vary significantly from country to country and as a result so can the price of our products. Certain countries set prices by reference to the prices in other countries where our products are marketed. Thus, our inability to secure adequate prices in a particular country may not only limit the revenue from our products within that country, but may also adversely affect our ability to obtain acceptable prices in other markets. This may create the opportunity for third-party cross-border trade or influence our decision to sell or not to sell a product, thus adversely affecting our geographic expansion plans and revenues.

Our failure to maintain adequate coverage, pricing or reimbursement for our products would have an adverse effect on our business, revenues and results of operations, could curtail or eliminate our ability to adequately fund research and development programs for the discovery and commercialization of new products, and could cause a decline in our stock price.

Drug prices are under significant scrutiny in the markets in which our products are prescribed. We expect drug pricing and other health care costs to continue to be subject to intense political and societal pressures on a global basis. In addition, competition from current and future competitors may negatively impact our ability to maintain pricing and our market share. New products or treatments brought to market by our competitors could cause revenues for our products to decrease due to potential price reductions and lower sales volumes. As a result, our business and reputation may be harmed, our stock price may be adversely impacted and experience periods of volatility and our results of operations may be adversely impacted.

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Our results of operations may be adversely affected by current and potential future healthcare reforms.

In the U.S., federal and state legislatures, health agencies and third-party payors continue to focus on containing the cost of health care. Legislative and regulatory proposals and enactments to reform health care insurance programs could significantly influence the manner in which our products are prescribed and purchased. For example, provisions of the Patient Protection and Affordable Care Act (PPACA) have resulted in changes in the way health care is paid for by both governmental and private insurers, including increased rebates owed by manufacturers under the Medicaid Drug Rebate Program, annual fees and taxes on manufacturers of certain branded prescription drugs, the requirement that manufacturers participate in a discount program for certain outpatient drugs under Medicare Part D and the expansion of the number of hospitals eligible for discounts under Section 340B of the Public Health Service Act. These changes have had and are expected to continue to have a significant impact on our business.

We may face uncertainties as a result of federal and administrative efforts to repeal, substantially modify or invalidate some or all of the provisions of the PPACA. There is no assurance that the PPACA, as currently enacted or as amended in the future, will not adversely affect our business and financial results, and we cannot predict how future federal or state legislative or administrative changes relating to healthcare reform will affect our business.

The administration has also indicated an intent to address prescription drug pricing and recent Congressional hearings have brought increased public attention to the costs of prescription drugs. These actions and the uncertainty about the future of the PPACA and healthcare laws may put downward pressure on pharmaceutical pricing and increase our regulatory burdens and operating costs.

There is also significant economic pressure on state budgets that may result in states increasingly seeking to achieve budget savings through mechanisms that limit coverage or payment for our drugs. In recent years, some states have considered legislation and ballot initiatives that would control the prices of drugs, including laws to allow importation of pharmaceutical products from lower cost jurisdictions outside the U.S. and laws intended to impose price controls on state drug purchases. State Medicaid programs are increasingly requesting manufacturers to pay supplemental rebates and requiring prior authorization by the state program for use of any drug for which supplemental rebates are not being paid. Government efforts to reduce Medicaid expenses may lead to increased use of managed care organizations by Medicaid programs. This may result in managed care organizations influencing prescription decisions for a larger segment of the population and a corresponding constraint on prices and reimbursement for our products.

In the E.U. and some other international markets, the government provides health care at low cost to consumers and regulates pharmaceutical prices, patient eligibility or reimbursement levels to control costs for the government-sponsored health care system. Many countries have announced or implemented measures to reduce health care costs to constrain their overall level of government expenditures. These measures vary by country and may include, among other things, patient access restrictions, suspensions on price increases, prospective and possibly retroactive price reductions and other recoupments and increased mandatory discounts or rebates, recoveries of past price increases and greater importation of drugs from lower-cost countries to higher-cost countries. These measures have negatively impacted our revenues, and may continue to adversely affect our revenues and results of operations in the future.

Adverse safety events or restrictions on use and safety warnings for our products can negatively affect our business, product sales and stock price.

Adverse safety events involving our marketed products may have a negative impact on our business. Discovery of safety issues with our products could create product liability and could cause additional regulatory scrutiny and requirements for additional labeling or safety monitoring, withdrawal of products from the market and the imposition of fines or criminal penalties. Adverse safety events may also damage physician and patient confidence in our products and our reputation. Any of these could result in liabilities, loss of revenue, material write-offs of inventory, material impairments of intangible assets, goodwill and fixed assets, material restructuring charges and other adverse impacts on our results of operations.

Regulatory authorities are making greater amounts of stand-alone safety information directly available to the public through periodic safety update reports, patient registries and other reporting requirements. The reporting of adverse safety events involving our products or products similar to ours and public rumors about such events may increase claims against us and may also cause our product sales or stock price to decline or experience periods of volatility.

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Restrictions on use or significant safety warnings that may be required to be included in the label of our products, such as the risk of developing progressive multifocal leukoencephalopathy, a serious brain infection, in the label for certain of our products, may significantly reduce expected revenues for those products and require significant expense and management time.

If we are unable to obtain and maintain adequate protection for our data, intellectual property and other proprietary rights, our business may be harmed.

Our success depends in part on our ability to obtain and defend patent and other intellectual property rights that are important to the commercialization of our products and product candidates. The degree of patent protection that will be afforded to our products and processes in the U.S. and in other important markets remains uncertain and is dependent upon the scope of protection decided upon by the patent offices, courts, administrative bodies and lawmakers in these countries. We can provide no assurance that we will successfully obtain or preserve patent protection for the technologies incorporated into our products and processes, or that the protection obtained will be of sufficient breadth and degree to protect our commercial interests in all countries where we conduct business. If we cannot prevent others from exploiting our inventions, we will not derive the benefit from them that we currently expect. Furthermore, we can provide no assurance that our products will not infringe patents or other intellectual property rights held by third parties.

We also rely on regulatory exclusivity for protection of our products. Implementation and enforcement of regulatory exclusivity, which may consist of regulatory data protection and market protection, varies widely from country to country. Failure to qualify for regulatory exclusivity, or failure to obtain or maintain the extent or duration of such protections that we expect in each of the markets for our products due to challenges, changes or interpretations in the law or otherwise, could affect our revenue for our products or our decision on whether to market our products in a particular country or countries or could otherwise have an adverse impact on our results of operations.

Litigation, interferences, oppositions, inter partes reviews or other proceedings are, have been and may in the future be necessary in some instances to determine the validity and scope of certain of our proprietary rights, and in other instances to determine the validity, scope or non-infringement of certain patent rights claimed by third parties to be pertinent to the manufacture, use or sale of our products. We may also face challenges to our patent and regulatory protections covering our products by third parties, including manufacturers of generics and biosimilars that may choose to launch or attempt to launch their products before the expiration of our patent or regulatory exclusivity. Litigation, interference, oppositions, inter partes reviews, administrative challenges or other similar types of proceedings are unpredictable and may be protracted, expensive and distracting to management. The outcome of such proceedings could adversely affect the validity and scope of our patent or other proprietary rights, hinder our ability to manufacture and market our products, require us to seek a license for the infringed product or technology or result in the assessment of significant monetary damages against us that may exceed amounts, if any, accrued in our financial statements. An adverse determination in a judicial or administrative proceeding or a failure to obtain necessary licenses could prevent us from manufacturing or selling our products. Furthermore, payments under any licenses that we are able to obtain would reduce our profits derived from the covered products and services.

Our long-term success depends upon the successful development of new products and additional indications for existing products.

Our long-term viability and growth will depend upon successful development of additional indications for our existing products as well as successful development of new products and technologies from our research and development activities, our biosimilars joint venture with Samsung Biologics or licenses or acquisitions from third parties.

Product development is very expensive and involves a high degree of risk. Only a small number of research and development programs result in the commercialization of a product. Clinical trials may indicate that our product candidates lack efficacy, have harmful side effects, result in unexpected adverse events or raise other concerns that may significantly reduce the likelihood of regulatory approval. This may result in terminated programs, significant restrictions on use and safety warnings in an approved label, adverse placement within the treatment paradigm or significant reduction in the commercial potential of the product candidate.

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Clinical trials and the development of biopharmaceutical products is a lengthy and complex process. If we fail to adequately manage our clinical activities, our clinical trials or potential regulatory approvals may be delayed or denied.

Conducting clinical trials is a complex, time-consuming and expensive process. Our ability to complete clinical trials in a timely fashion depends in large part on a number of key factors. These factors include protocol design, regulatory and institutional review board approval, patient enrollment rates and compliance with current Good Clinical Practices. If we or our third-party clinical trial providers or third-party CROs do not successfully carry out these clinical activities, our clinical trials or the potential regulatory approval of a product candidate may be delayed or be unsuccessful.

We have opened clinical sites and are enrolling patients in a number of countries where our experience is limited. In most cases, we use the services of third parties to carry out our clinical trial related activities and rely on such parties to accurately report their results. Our reliance on third parties for these activities may impact our ability to control the timing, conduct, expense and quality of our clinical trials. One CRO has responsibility for a substantial portion of our clinical trial related activities and reporting. If this CRO does not adequately perform, many of our trials may be affected. We may need to replace our CROs. Although we believe there are a number of other CROs we could engage to continue these activities, the replacement of an existing CRO may result in the delay of the affected trials or otherwise adversely affect our efforts to obtain regulatory approvals and commercialize our product candidates.

Successful preclinical work or early stage clinical trials does not ensure success in later stage trials, regulatory approval or commercial viability of a product.

Positive results in a trial may not be replicated in subsequent or confirmatory trials. Additionally, success in preclinical work or early stage clinical trials does not ensure that later stage or larger scale clinical trials will be successful or that regulatory approval will be obtained. In addition, even if later stage clinical trials are successful, regulatory authorities may delay or decline approval of our product candidates. Regulatory authorities may disagree with our view of the data, require additional studies or disagree with our trial design or endpoints. Regulatory authorities may also fail to approve the facilities or the processes used to manufacture a product candidate, our dosing or delivery methods or companion devices. Regulatory authorities may grant marketing approval that is more restricted than anticipated. These restrictions may include limiting indications to narrow patient populations and the imposition of safety monitoring, educational requirements and risk evaluation and mitigation strategies. The occurrence of any of these events could result in significant costs and expenses, have an adverse effect on our business, financial condition and results of operations and cause our stock price to decline or experience periods of volatility.

Even if we are able to successfully develop new products or indications, sales of new products or products with additional indications may not meet investor expectations. We may also make a strategic decision to discontinue development of a product or indication if, for example, we believe commercialization will be difficult relative to the standard of care or other opportunities in our pipeline.

Management and key personnel changes may disrupt our operations, and we may have difficulty retaining key personnel or attracting and retaining qualified replacements on a timely basis for management and other key personnel who may leave the Company.

We have experienced changes in management and other key personnel in critical functions across our organization, including our chief executive officer, and our heads of research and development and pharmaceutical operations and technology. Changes in management and other key personnel have the potential to disrupt our business, and any such disruption could adversely affect our operations, programs, growth, financial condition and results of operations. Further, new members of management may have different perspectives on programs and opportunities for our business, which may cause us to focus on new business opportunities or reduce or change emphasis on our existing business programs.

Our success is dependent upon our ability to attract and retain qualified management and key personnel in a highly competitive environment. Qualified individuals are in high demand, and we may incur significant costs to attract them, particularly at the executive level. We may face difficulty in attracting and retaining key talent for a number of reasons, such as management changes, the underperformance or discontinuation of one or more late stage programs or recruitment by competitors. We cannot assure you that we will be able to hire or retain the personnel necessary for our operations or that the loss of any such personnel will not have a material impact on our financial condition and results of operations.

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Manufacturing issues could substantially increase our costs, limit supply of our products and reduce our revenues.

The process of manufacturing our products is complex, highly regulated and subject to numerous risks, including:

•

Risk of Product Loss. The manufacturing process for our products is extremely susceptible to product loss due to contamination, oxidation, equipment failure or improper installation or operation of equipment, or vendor or operator error. Even minor deviations from normal manufacturing processes could result in reduced production yields, product defects and other supply disruptions. If microbial, viral or other contaminations are discovered in our products or manufacturing facilities, we may need to close our manufacturing facilities for an extended period of time to investigate and remediate the contaminant.

•

Risks of Reliance on Third Parties and Single Source Providers. We rely on third-party suppliers and manufacturers for many aspects of our manufacturing process for our products and product candidates. In some cases, due to the unique manner in which our products are manufactured, we rely on single source providers of raw materials and manufacturing supplies. These third parties are independent entities subject to their own unique operational and financial risks that are outside of our control. These third parties may not perform their obligations in a timely and cost-effective manner or in compliance with applicable regulations, and they may be unable or unwilling to increase production capacity commensurate with demand for our existing or future products. Finding alternative providers could take a significant amount of time and involve significant expense due to the specialized nature of the services and the need to obtain regulatory approval of any significant changes to our suppliers or manufacturing methods. We cannot be certain that we could reach agreement with alternative providers or that the FDA or other regulatory authorities would approve our use of such alternatives.

•

Global Bulk Supply Risks. We rely on our principal manufacturing facilities for the production of drug substance for our large molecule products and product candidates. Our global bulk supply of these products and product candidates depends on the uninterrupted and efficient operation of these facilities, which could be adversely affected by equipment failures, labor shortages, natural disasters, power failures and numerous other factors.

•

Risks Relating to Compliance with current Good Manufacturing Practices (cGMP). We and our third-party providers are generally required to maintain compliance with cGMP and other stringent requirements and are subject to inspections by the FDA and comparable agencies in other jurisdictions to confirm such compliance. Any delay, interruption or other issues that arise in the manufacture, fill-finish, packaging or storage of our products as a result of a failure of our facilities or the facilities or operations of third parties to pass any regulatory agency inspection could significantly impair our ability to develop and commercialize our products. Significant noncompliance could also result in the imposition of monetary penalties or other civil or criminal sanctions and damage our reputation.

Any adverse developments affecting our manufacturing operations or the operations of our third-party suppliers and manufacturers may result in shipment delays, inventory shortages, lot failures, product withdrawals or recalls or other interruptions in the commercial supply of our products. We may also have to take inventory write-offs and incur other charges and expenses for products that fail to meet specifications, undertake costly remediation efforts or seek more costly manufacturing alternatives. Such developments could increase our manufacturing costs, cause us to lose revenue or market share as patients and physicians turn to competing therapeutics, diminish our profitability or damage our reputation.

We depend on relationships with collaborators and other third parties for revenue, and for the development, regulatory approval, commercialization and marketing of certain products and product candidates, which are outside of our full control.

We rely on a number of significant collaborative and other third-party relationships for revenue, and for the development, regulatory approval, commercialization and marketing of certain of our products and product candidates. We also outsource to third parties certain aspects of our regulatory affairs and clinical development relating to our products and product candidates. Reliance on collaborative and other third-party relationships subjects us to a number of risks, including:


•	we may be unable to control the resources our collaborators or third parties devote to our programs or products;

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•

disputes may arise under the agreement, including with respect to the achievement and payment of milestones or ownership of rights to technology developed with our collaborators or other third parties, and the underlying contract with our collaborators or other third parties may fail to provide significant protection or may fail to be effectively enforced if the collaborators or third parties fail to perform;


•	the interests of our collaborators or third parties may not always be aligned with our interests, and such parties may not pursue regulatory approvals or market a product in the same manner or to the same extent that we would, which could adversely affect our revenues;


•	third-party relationships and collaborations often require the parties to cooperate, and failure to do so effectively could adversely affect product sales, or the clinical development or regulatory approvals of products under joint control or could result in termination of the research, development or commercialization of product candidates or result in litigation or arbitration; and

•

any failure on the part of our collaborators or other third parties to comply with applicable laws and regulatory requirements in the marketing, sale and maintenance of the marketing authorization of our products or to fulfill any responsibilities our collaborators or other third parties may have to protect and enforce any intellectual property rights underlying our products could have an adverse effect on our revenues as well as involve us in possible legal proceedings.

Given these risks, there is considerable uncertainty regarding the success of our current and future collaborative efforts. If these efforts fail, our product development or commercialization of new products could be delayed or revenues from products could decline.

Our business may be adversely affected if we do not successfully execute our growth initiatives.

We anticipate growth through internal development projects, commercial initiatives and external opportunities, which may include the acquisition, partnering and in-licensing of products, technologies and companies or the entry into strategic alliances and collaborations. While we believe we have a number of promising programs in our pipeline, failure of internal development projects to advance or difficulties in executing on our commercial initiatives could impact our current and future growth, resulting in additional reliance on external development opportunities for growth. The availability of high quality, cost-effective development opportunities is limited and competitive, and we are not certain that we will be able to identify candidates that we and our shareholders consider suitable or complete transactions on terms that are acceptable to us and our shareholders. We may fail to complete transactions for other reasons, including if we are unable to obtain desired financing on favorable terms, if at all. Even if we are able to successfully identify and complete acquisitions and other strategic alliances and collaborations, we may face unanticipated costs or liabilities in connection with the transaction or we may not be able to integrate them or take full advantage of them or otherwise realize the benefits that we expect.

Supporting our growth initiatives and the further development of our existing products and potential new products in our pipeline will require significant capital expenditures and management resources, including investments in research and development, sales and marketing, manufacturing capabilities and other areas of our business. If we do not successfully execute our growth initiatives, then our business and financial results may be adversely affected and we may incur asset impairment or restructuring charges.

We may incur operational difficulties or be exposed to claims and liabilities as a result of the separation and distribution of Bioverativ.

On February 1, 2017, we distributed all of the then outstanding shares of Bioverativ common stock to Biogen shareholders in connection with the separation of our hemophilia business. In connection with the distribution, we entered into a separation and distribution agreement and various other agreements (including a transition services agreement, a tax matters agreement, a manufacturing and supply agreement, an employee matters agreement, an intellectual property matters agreement and certain other commercial agreements). These agreements govern the separation and distribution and the relationship between the us and Bioverativ going forward, including with respect to potential tax-related losses associated with the separation and distribution. They also provide for the performance of services by each company for the benefit of the other for a period of time (including under the manufacturing and supply agreement pursuant to which we will manufacture and supply certain products and materials to Bioverativ).

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The spin-off of our hemophilia business as an independent public company is intended to qualify for tax-free treatment to Biogen and its shareholders under the Internal Revenue Code. Completion of the spin-off was conditioned upon, among other things, our receipt of a favorable opinion from our tax advisors with respect to the tax-free nature of the transaction. The opinion is not binding on the U.S. Internal Revenue Service, or the courts, and there can be no assurance that the IRS or the courts will not challenge the qualification of the spin-off as a tax-free transaction or that any such challenge would not prevail. If the spin-off is determined to be taxable, Biogen and its shareholders could incur significant tax liabilities, which could adversely affect our business, financial condition, or results of operations.

Bioverativ has agreed to indemnify us for certain potential liabilities that may arise, but we cannot guarantee that Bioverativ will be able to satisfy its indemnification obligations.

The separation and distribution agreement provides for indemnification obligations designed to make Bioverativ financially responsible for many liabilities that may exist relating to its business activities, whether incurred prior to or after the distribution, including any pending or future litigation. It is possible that a court would disregard the allocation agreed to between us and Bioverativ and require us to assume responsibility for obligations allocated to Bioverativ. Third parties could also seek to hold us responsible for any of these liabilities or obligations, and the indemnity rights we have under the separation and distribution agreement may not be sufficient to fully cover all of these liabilities and obligations. Even if we are successful in obtaining indemnification, we may have to bear costs temporarily. In addition, our indemnity obligations to Bioverativ may be significant. These risks could negatively affect our business, financial condition or results of operations.

The separation of Bioverativ continues to involve a number of risks, including, among other things, the indemnification risks described above and the potential that management’s and our employees’ attention will be significantly diverted by the provision of transitional services. Certain of the agreements described above provide for the performance of services by each company for the benefit of the other for a period of time. If Bioverativ is unable to satisfy its obligations under these agreements, including its indemnification obligations, we could incur losses. These arrangements could also lead to disputes over rights to certain shared property and over the allocation of costs and revenues for products and operations. Our inability to effectively manage the separation activities and related events could adversely affect our business, financial condition or results of operations.

We may not achieve some or all of the anticipated benefits of the separation of Bioverativ, which may adversely affect our business.

We may not be able to achieve the full strategic and financial benefits expected to result from the separation of Bioverativ, or such benefits may be delayed or not occur at all. If we fail to achieve some or all of the expected benefits of the separation, or if such benefits are delayed, our business, financial condition, results of operations and the value of our stock could be adversely impacted.

A breakdown or breach of our technology systems could subject us to liability or interrupt the operation of our business.

We are increasingly dependent upon technology systems and data. Our computer systems continue to increase in multitude and complexity due to the growth in our business, making them potentially vulnerable to breakdown, malicious intrusion and random attack. Likewise, data privacy or security breaches by individuals authorized to access our technology systems or others may pose a risk that sensitive data, including intellectual property, trade secrets or personal information belonging to us, our patients, customers or other business partners, may be exposed to unauthorized persons or to the public. Cyber-attacks are increasing in their frequency, sophistication and intensity, and are becoming increasingly difficult to detect. They are often carried out by motivated, well-resourced, skilled and persistent actors including nation states, organized crime groups, “hacktivists" and employees or contractors acting with malicious intent. Cyber-attacks could include the deployment of harmful malware and key loggers, a denial-of-service attack, a malicious website, the use of social engineering and other means to affect the confidentiality, integrity and availability of our technology systems and data. Our key business partners face similar risks and any security breach of their systems could adversely affect our security posture. While we continue to build and improve our systems and infrastructure and believe we have taken appropriate security measures to reduce these risks to our data and information technology systems, there can be no assurance that our efforts will prevent breakdowns or breaches in our systems that could adversely affect our business and operations and/or result in the loss of critical or sensitive information, which could result in financial, legal, business or reputational harm to us. In addition, our liability insurance may not be sufficient in type or amount to cover us against claims related to security breaches, cyber-attacks and other related breaches.

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If we fail to comply with the extensive legal and regulatory requirements affecting the health care industry, we could face increased costs, penalties and a loss of business.

Our activities, and the activities of our collaborators, distributors and other third-party providers, are subject to extensive government regulation and oversight both in the U.S. and in foreign jurisdictions. The FDA and comparable agencies in other jurisdictions directly regulate many of our most critical business activities, including the conduct of preclinical and clinical studies, product manufacturing, advertising and promotion, product distribution, adverse event reporting and product risk management. Our interactions in the U.S. or abroad with physicians and other health care providers that prescribe or purchase our products are also subject to government regulation designed to prevent fraud and abuse in the sale and use of the products and place significant restrictions on the marketing practices of health care companies. Health care companies such as ours are facing heightened scrutiny of their relationships with health care providers from anti-corruption enforcement officials. In addition, health care companies such as ours have been the target of lawsuits and investigations alleging violations of government regulation, including claims asserting submission of incorrect pricing information, impermissible off-label promotion of pharmaceutical products, payments intended to influence the referral of health care business, submission of false claims for government reimbursement, antitrust violations or violations related to environmental matters. There is also enhanced scrutiny of company-sponsored patient assistance programs, including insurance premium and co-pay assistance programs and donations to third-party charities that provide such assistance. If we or our vendors or donation recipients are deemed to fail to comply with relevant laws, regulations or government guidance in the operation of these programs, we could be subject to significant fines or penalties. Risks relating to compliance with laws and regulations may be heightened as we continue to expand our global operations and enter new therapeutic areas with different patient populations, which may have different product distribution methods, marketing programs or patient assistance programs from those we currently utilize or support.

Regulations governing the health care industry are subject to change, with possibly retroactive effect, including:

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new laws, regulations or judicial decisions, or new interpretations of existing laws, regulations or decisions, related to health care availability, pricing or marketing practices, compliance with wage and hour laws and other employment practices, method of delivery, payment for health care products and services, compliance with health information and data privacy and security laws and regulations, tracking and reporting payments and other transfers of value made to physicians and teaching hospitals, extensive anti-bribery and anti-corruption prohibitions, product serialization and labeling requirements and used product take-back requirements;


•	changes in the FDA and foreign regulatory approval processes that may delay or prevent the approval of new products and result in lost market opportunity;


•	the hiring freeze implemented by the federal government in 2017, including at the FDA, could impact the review and potential approval of new products, which may adversely affect our business and financial condition;

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requirements that provide for increased transparency of clinical trial results and quality data, such as the European Medicines Agency's clinical transparency policy, which could impact our ability to protect trade secrets and competitively-sensitive information contained in approval applications or could be misinterpreted leading to reputational damage, misperception or legal action, which could harm our business; and


•	changes in FDA and foreign regulations that may require additional safety monitoring, labeling changes, restrictions on product distribution or use, or other measures after the introduction of our products to market, which could increase our costs of doing business, adversely affect the future permitted uses of approved products or otherwise adversely affect the market for our products.

Violations of governmental regulation may be punishable by criminal and civil sanctions against us, including fines and civil monetary penalties and exclusion from participation in government programs, including Medicare and Medicaid, as well as against executives overseeing our business. In addition to penalties for violation of laws and regulations, we could be required to repay amounts we received from government payors, or pay additional rebates and interest if we are found to have miscalculated the pricing information we have submitted to the government. We cannot ensure that our compliance controls, policies and procedures will in every instance protect us from acts committed by our employees, collaborators, partners or third-party providers that would violate the laws or regulations of the jurisdictions in which we operate. Whether or not we have complied with the law, an investigation into alleged unlawful conduct could increase our expenses, damage our reputation, divert management time and attention and adversely affect our business.

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Our effective tax rate may fluctuate and we may incur obligations in tax jurisdictions in excess of accrued amounts.

As a global biopharmaceutical company, we are subject to taxation in numerous countries, states and other jurisdictions. As a result, our effective tax rate is derived from a combination of applicable tax rates in the various places that we operate. In preparing our financial statements, we estimate the amount of tax that will become payable in each of such places. Our effective tax rate, however, may be different than experienced in the past due to numerous factors, including changes in the mix of our profitability from country to country, the results of examinations and audits of our tax filings, adjustments to the value of our uncertain tax positions, changes in accounting for income taxes and changes in tax laws. Any of these factors could cause us to experience an effective tax rate significantly different from previous periods or our current expectations.

In addition, our inability to secure or sustain acceptable arrangements with tax authorities and future changes in the tax laws, among other things, may result in tax obligations in excess of amounts accrued in our financial statements.

In the U.S., there are several proposals under consideration to reform tax law, including proposals that may reduce or eliminate the deferral of U.S. income tax on our unrepatriated earnings, penalize certain transfer pricing structures and reduce or eliminate certain foreign or domestic tax credits or deductions. Our future reported financial results may be adversely affected by tax law changes which restrict or eliminate certain foreign tax credits or our ability to deduct expenses attributable to foreign earnings, or otherwise affect the treatment of our unrepatriated earnings.

In addition to U.S. tax reform proposals, the adoption of some or all of the recommendations set forth in the Organization for Economic Co-operation and Development’s project on “Base Erosion and Profit Shifting” by tax authorities in the countries in which we operate could negatively impact our effective tax rate. These recommendations focus on payments from affiliates in high tax jurisdictions to affiliates in lower tax jurisdictions and the activities that give rise to a taxable presence in a particular country.

Our indebtedness could adversely affect our business and limit our ability to plan for or respond to changes in our business.

Our indebtedness, together with our significant contingent liabilities, including milestone and royalty payment obligations, could have important consequences to our business; for example, such obligations could:


•	increase our vulnerability to general adverse economic and industry conditions;


•	limit our ability to access capital markets and incur additional debt in the future;


•	require us to dedicate a substantial portion of our cash flow from operations to payments on our indebtedness, thereby reducing the availability of our cash flow for other purposes, including business development efforts, research and development and mergers and acquisitions; and


•	limit our flexibility in planning for, or reacting to, changes in our business and the industry in which we operate, thereby placing us at a competitive disadvantage compared to our competitors that have less debt.

Our sales and operations are subject to the risks of doing business internationally.

We are increasing our presence in international markets, particularly emerging markets, subjecting us to many risks that could adversely affect our business and revenues, such as:


•	the inability to obtain necessary foreign regulatory or pricing approvals of products in a timely manner;


•	uncertainties regarding the collectability of accounts receivable;


•	fluctuations in foreign currency exchange rates, in particular the recent strength of the U.S. dollar versus foreign currencies, which has adversely impacted our revenues and net income;


•	difficulties in staffing and managing international operations;


•	the imposition of governmental controls;


•	less favorable intellectual property or other applicable laws;

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•	increasingly complex standards for complying with foreign laws and regulations that may differ substantially from country to country and may conflict with corresponding U.S. laws and regulations;


•	the far-reaching anti-bribery and anti-corruption legislation in the U.K., including the U.K. Bribery Act 2010, and elsewhere and escalation of investigations and prosecutions pursuant to such laws;


•	compliance with complex import and export control laws;


•	restrictions on direct investments by foreign entities and trade restrictions;


•	greater political or economic instability; and


•	changes in tax laws and tariffs.

In addition, our international operations are subject to regulation under U.S. law. For example, the Foreign Corrupt Practices Act prohibits U.S. companies and their representatives from offering, promising, authorizing or making payments to foreign officials for the purpose of obtaining or retaining business abroad. In many countries, the health care professionals we regularly interact with may meet the definition of a foreign government official for purposes of the Foreign Corrupt Practices Act. Failure to comply with domestic or foreign laws could result in various adverse consequences, including: possible delay in approval or refusal to approve a product; recalls, seizures or withdrawal of an approved product from the market; disruption in the supply or availability of our products or suspension of export or import privileges; the imposition of civil or criminal sanctions; the prosecution of executives overseeing our international operations; and damage to our reputation. Any significant impairment of our ability to sell products outside of the U.S. could adversely impact our business and financial results.

Our operating results are subject to significant fluctuations.

Our quarterly revenues, expenses and net income (loss) have fluctuated in the past and are likely to fluctuate significantly in the future due to the risks described in these “Risk Factors” as well as the timing of charges and expenses that we may take. We have recorded, or may be required to record, charges that include:


•	the cost of restructurings;


•	impairments with respect to investments, fixed assets and long-lived assets, including in-process R&D and other intangible assets;


•	inventory write-downs for failed quality specifications, charges for excess or obsolete inventory and charges for inventory write downs relating to product suspensions, expirations or recalls;


•	changes in the fair value of contingent consideration;


•	bad debt expenses and increased bad debt reserves;


•	outcomes of litigation and other legal or administrative proceedings, regulatory matters and tax matters;


•	milestone payments under license and collaboration agreements; and


•	payments in connection with acquisitions and other business development activities.

Our revenues are also subject to foreign currency exchange rate fluctuations due to the global nature of our operations. Although we have foreign currency forward contracts to hedge specific forecasted transactions denominated in foreign currencies, our efforts to mitigate the impact of fluctuating currency exchange rates may not be successful. As a result, currency fluctuations among our reporting currency, the U.S. dollar and the currencies in which we do business will affect our operating results, often in unpredictable ways. Our net income may also fluctuate due to the impact of charges we may be required to take with respect to foreign currency hedge transactions. In particular, we may incur higher than expected charges from hedge ineffectiveness or from the termination of a hedge relationship.

Our operating results during any one period do not necessarily suggest the anticipated results of future periods.

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We are pursuing opportunities to expand our manufacturing capacity for future clinical and commercial requirements for product candidates, which will result in the incurrence of significant investment with no assurance that such investment will be recouped.

While we believe we currently have sufficient large scale manufacturing capacity to meet our near-term manufacturing requirements, it is probable that we would need additional large scale manufacturing capacity to support future clinical and commercial manufacturing requirements for product candidates in our pipeline, if such candidates are successful and approved. We are building a large scale biologics manufacturing facility in Solothurn, Switzerland and acquired an additional manufacturing facility in Research Triangle Park, North Carolina. Due to the long lead times necessary for the expansion of manufacturing capacity, we expect to make significant investments to build or expand our facilities or obtain third-party contract manufacturers with no assurance that such investment will be recouped. If we are unable to adequately and timely manufacture and supply our products and product candidates or if we do not fully utilize our manufacturing facilities, our business may be harmed.

Our investment in Samsung Bioepis, and our success in commercializing biosimilars developed by Samsung Bioepis, are subject to risks and uncertainties inherent in the development, manufacture and commercialization of biosimilars.

Our investment in Samsung Bioepis, and our success in commercializing biosimilars developed by Samsung Bioepis, are subject to a number of risks, including:


•	Reliance on Third Parties. We are dependent on the efforts of Samsung Bioepis and other third parties over whom we have limited or no control in the development and manufacturing of biosimilars products. If Samsung Bioepis or such other third parties fail to perform successfully, we may not realize the anticipated benefits of our investment in Samsung Bioepis;


•	Regulatory Compliance. Biosimilar products may face regulatory hurdles or delays due to the evolving and uncertain regulatory and commercial pathway of biosimilars products in certain jurisdictions;


•	Intellectual Property and Regulatory Challenges. Biosimilar products may face extensive patent clearances, patent infringement litigation, injunctions or regulatory challenges, which could prevent the commercial launch of a product or delay it for many years;


•	Failure to Gain Market and Patient Acceptance. Market success of biosimilar products will be adversely affected if patients, physicians and/or payers do not accept biosimilar products as safe and efficacious products offering a more competitive price or other benefit over existing therapies;


•	Ability to Provide Adequate Supply. Manufacturing biosimlars is complex. If we encounter any manufacturing or supply chain difficulties, we may be unable to meet higher than anticipated demand; and

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Competitive Challenges. Biosimilar products face significant competition, including from innovator products and from biosimilar products offered by other companies. In some jurisdictions, local tendering processes may restrict biosimilar products from being marketed and sold in those jurisdictions. The number of competitors in a jurisdiction, the timing of approval and the ability to market biosimilar products successfully in a timely and cost-effective matter are additional factors that may impact our success and/or the success of Samsung Bioepis in this business area.

Our investments in properties may not be fully realized.

We own or lease real estate primarily consisting of buildings that contain research laboratories, office space and manufacturing operations. For strategic or other operational reasons, we may decide to further consolidate or co-locate certain aspects of our business operations or dispose of one or more of our properties, some of which may be located in markets that are experiencing high vacancy rates and decreasing property values. If we determine that the fair value of any of our owned properties is lower than their book value we may not realize the full investment in these properties and incur significant impairment charges or additional depreciation when the expected useful lives of certain assets have been shortened due to the anticipated closing of facilities. If we decide to fully or partially vacate a leased property, such as ceasing manufacturing at our facility in Cambridge, Massachusetts, we may incur significant cost, including facility closing costs, employee separation and retention expenses, lease termination fees, rent expense in excess of sublease income and impairment of leasehold improvements and accelerated depreciation of assets. Any of these events may have an adverse impact on our results of operations.

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Our portfolio of marketable securities is subject to market, interest and credit risk that may reduce its value.

We maintain a portfolio of marketable securities for investment of our cash. Changes in the value of our portfolio of marketable securities could adversely affect our earnings. In particular, the value of our investments may decline due to increases in interest rates, downgrades of the bonds and other securities included in our portfolio, instability in the global financial markets that reduces the liquidity of securities included in our portfolio, declines in the value of collateral underlying the securities included in our portfolio and other factors. Each of these events may cause us to record charges to reduce the carrying value of our investment portfolio or sell investments for less than our acquisition cost. Although we attempt to mitigate these risks through diversification of our investments and continuous monitoring of our portfolio's overall risk profile, the value of our investments may nevertheless decline.

There can be no assurance that we will continue to repurchase stock or that we will repurchase stock at favorable prices.

From time to time our Board of Directors authorizes stock repurchase programs, including most recently our 2016 Share Repurchase Program. The amount and timing of stock repurchases are subject to capital availability and our determination that stock repurchases are in the best interest of our shareholders and are in compliance with all respective laws and our agreements applicable to the repurchase of stock. Our ability to repurchase stock will depend upon, among other factors, our cash balances and potential future capital requirements for strategic transactions, our results of operations, our financial condition and other factors beyond our control that we may deem relevant. A reduction in, or the completion or expiration of, our stock repurchase programs could have a negative effect on our stock price. We can provide no assurance that we will repurchase stock at favorable prices, if at all.

We may not be able to access the capital and credit markets on terms that are favorable to us.

We may seek access to the capital markets to supplement our existing funds and cash generated from operations for working capital, capital expenditure and debt service requirements and other business initiatives. The capital and credit markets have experienced extreme volatility and disruption, which leads to uncertainty and liquidity issues for both borrowers and investors. In the event of adverse capital and credit market conditions, we may be unable to obtain capital market financing on favorable terms. Changes in credit ratings issued by nationally recognized credit rating agencies could also adversely affect our cost of financing and the market price of our securities.

Our business involves environmental risks, which include the cost of compliance and the risk of contamination or injury.

Our business and the business of several of our strategic partners involve the controlled use of hazardous materials, chemicals, biologics and radioactive compounds. Although we believe that our safety procedures for handling and disposing of such materials comply with state, federal and foreign standards, there will always be the risk of accidental contamination or injury. If we were to become liable for an accident, or if we were to suffer an extended facility shutdown, we could incur significant costs, damages and penalties that could harm our business. Manufacturing of our products and product candidates also requires permits from government agencies for water supply and wastewater discharge. If we do not obtain appropriate permits, including permits for sufficient quantities of water and wastewater, we could incur significant costs and limits on our manufacturing volumes that could harm our business.

The illegal distribution and sale by third parties of counterfeit versions of our products or stolen products could have a negative impact on our reputation and business.

Third parties might illegally distribute and sell counterfeit or unfit versions of our products, which do not meet our rigorous manufacturing, distribution and testing standards. A patient who receives a counterfeit or unfit drug may be at risk for a number of dangerous health consequences. Our reputation and business could suffer harm as a result of counterfeit or unfit drugs sold under our brand name. Stolen inventory that is not properly stored or sold through unauthorized channels could adversely impact patient safety, our reputation and our business. In addition, inventory that is stolen from warehouses, plants or while in-transit, and that is subsequently improperly stored and sold through unauthorized channels, could adversely impact patient safety, our reputation and our business.

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The increasing use of social media platforms presents new risks and challenges.

Social media is increasingly being used to communicate about our products and the diseases our therapies are designed to treat. Social media practices in the biopharmaceutical industry continue to evolve and regulations relating to such use are not always clear. This evolution creates uncertainty and risk of noncompliance with regulations applicable to our business. For example, patients may use social media channels to comment on the effectiveness of a product or to report an alleged adverse event. When such disclosures occur, there is a risk that we fail to monitor and comply with applicable adverse event reporting obligations or we may not be able to defend the company or the public's legitimate interests in the face of the political and market pressures generated by social media due to restrictions on what we may say about our products. There is also a risk of inappropriate disclosure of sensitive information or negative or inaccurate posts or comments about us on any social networking website. If any of these events were to occur or we otherwise fail to comply with applicable regulations, we could incur liability, face overly restrictive regulatory actions or incur other harm to our business.

Some of our collaboration agreements contain change in control provisions that may discourage a third party from attempting to acquire us.

Some of our collaboration agreements include change in control provisions that could reduce the potential acquisition price an acquirer is willing to pay or discourage a takeover attempt that could be viewed as beneficial to shareholders. Upon a change in control, some of these provisions could trigger reduced milestone, profit or royalty payments to us or give our collaboration partner rights to terminate our collaboration agreement, acquire operational control or force the purchase or sale of the programs that are the subject of the collaboration.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

The following table summarizes our common stock repurchase activity under our 2016 Share Repurchase Program during the first quarter of 2017:



Period	Total Number of Shares Purchased (#)	Average Price Paid per Share ($)	Total Number of Shares Purchased as Part of Publicly Announced Programs (#)	Maximum Approximate Dollar Value of Shares That May Yet Be Purchased Under Our Programs ($ in millions)
January 2017	—	—	—	$	4,000.0
February 2017	—	—	—	$	4,000.0
March 2017	775,000	281.57	775,000	$	3,781.8
Total	775,000	281.57

The following table summarizes our common stock repurchase activity under our 2011 Share Repurchase Program during the first quarter of 2017:



Period	Total Number of Shares Purchased (#)	Average Price Paid per Share ($)	Total Number of Shares Purchased as Part of Publicly Announced Programs (#)	Maximum Number of Shares That May Yet Be Purchased Under Our Programs (#)
January 2017	—	—	—	1,264,156
February 2017	600,000	286.02	600,000	664,156
March 2017	664,156	291.72	664,156	—
Total	1,264,156	289.02

From April 1, 2017 through April 25, 2017, we repurchased and expect to retire approximately 2.0 million shares of common stock at a cost of $542.5 million under our 2016 Share Repurchase Program. During this time, we paid an average price per share of $271.26. As of April 25, 2017, approximately $3.2 billion remains available to repurchase shares under this program.

In February 2011 our Board of Directors authorized a program to repurchase up to 20.0 million shares of common stock (2011 Share Repurchase Program). This authorization did not have an expiration date. During the three months ended March 31, 2017 , we repurchased 1.3 million shares of common stock at a cost of $365.4 million to complete this program. During the three months ended March 31, 2016 , we did not repurchase any shares of common stock under our 2011 Share Repurchase Program.

Item 6. Exhibits

The exhibits listed on the Exhibit Index immediately preceding such exhibits, which is incorporated herein by reference, are filed or furnished as part of this Quarterly Report on Form 10-Q.

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SIGNATURES

Pursuant to the requirements 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.

BIOGEN INC.

/s/ Paul J. Clancy

Paul J. Clancy

Executive Vice President and

Chief Financial Officer

(principal financial officer)

April 25, 2017

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EXHIBIT INDEX



Exhibit Number		Description of Exhibit

2.1		Separation Agreement between Biogen Inc. and Bioverativ Inc. Filed as Exhibit 2.1 to our Current Report on Form 8-K filed February 2, 2017.

10.1		Settlement and License Agreement, dated January 17, 2017, between Biogen Swiss Manufacturing GmbH, Biogen International Holding Ltd, Forward Pharma A/S and the other parties thereto. Filed as Exhibit 10.1 to our Current Report on Form 8-K filed on February 1, 2017.

31.1+		Certification of the Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2+		Certification of the Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1++		Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101++		The following materials from Biogen Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017, formatted in XBRL (Extensible Business Reporting Language): (i) the Condensed Consolidated Statements of Income, (ii) the Condensed Consolidated Statements of Comprehensive Income, (iii) the Condensed Consolidated Balance Sheets, (iv) the Condensed Consolidated Statements of Cash Flows, and (v) Notes to Condensed Consolidated Financial Statements.

+ Filed herewith

++ Furnished herewith

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Part I Financial Information Item 2. Management S Discussion and Analysis Of Financial Condition and Results Of Operations Item 3. Quantitative and Qualitative Disclosures About Market Risk Item 4. Controls and Procedures Part II Other Information Item 1. Legal Proceedings Item 1A. Risk Factors Item 2. Unregistered Sales Of Equity Securities and Use Of Proceeds Item 6. Exhibits

BIIB 10-Q Quarter ended March 31, 2017