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Biogen

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FY2016 Annual Report · Biogen
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 2016 ANNUAL  REP OR T

BIOGEN FORWARD

CORPORATE INFORMATION

Board of Directors

Stelios Papadopoulos, Ph.D.
Chairman, Biogen
Chairman, Exelixis, Inc. and 
Regulus Therapeutics, Inc.

Michel Vounatsos
Chief Executive Officer, Biogen

Alexander J. Denner, Ph.D.
Founding Partner, Sarissa Capital

Shareholder Information

Corporate Headquarters 
Biogen Inc.
225 Binney Street 
Cambridge, MA 02142 
Phone: (617) 679-2000

SEC Form 10-K
A copy of Biogen’s Annual 
Report on Form 10-K filed with 
the Securities and Exchange 
Commission is available at sec.gov 
and upon request to:

Investor Relations Department 
Biogen Inc.
225 Binney Street
Cambridge, MA 02142
Phone: (781) 464-2442

Common Stock Price

Caroline D. Dorsa
Retired Executive Vice President 
and Chief Financial Officer, 
Public Service Enterprise Group, 
Incorporated 

Richard C. Mulligan, Ph.D.
Portfolio Manager, Icahn Capital 
LP and Mallinckrodt Professor 
of Genetics, Emeritus, Harvard 
Medical School 

Nancy L. Leaming
Retired Chief Executive Officer and 
President, Tufts Health Plan

Robert W. Pangia
Partner, Ivy Capital Partners, LLC

Brian S. Posner
President, Point Rider Group LLC 
and Private Investor

Eric K. Rowinsky, M.D.
President and Executive Chairman, 
RGenix, Inc.

The Honorable Lynn Schenk
Attorney, Former Chief of Staff 
to the Governor of California 
and Former U.S. Congresswoman

Stephen A. Sherwin, M.D.
Clinical Professor of Medicine,
University of California, San 
Francisco, and advisor to life 
sciences companies

Transfer Agent
To keep your contact information 
current and for shareholder 
questions regarding lost stock 
certificates, address changes and 
changes of ownership or names in 
which the shares are held, direct 
inquiries to:

Computershare Trust
Company NA
250 Royall Street
Canton, MA 02021
Phone: (781) 575-2879 
computershare.com

Independent Account 
PricewaterhouseCoopers LLP 
101 Seaport Boulevard 
Boston, MA 02210

Market Information
Our common stock trades on 
the NASDAQ Global Select Market 
under the symbol “BIIB.”

The table below shows the 
high and low sales price for our 
common stock as reported by the 
NASDAQ Global Select Market for 
each quarter in the years ended 
December 31, 2016 and 2015.

News Releases
As a service to our shareholders 
and prospective investors, copies 
of Biogen news releases issued 
in the last 12 months are now 
available almost immediately 24 
hours a day, seven days a week, 
on the Web at businesswire.com. 
Biogen’s news releases are usually 
posted within one hour of being 
issued and are available at no cost 
at biogen.com.

HIGH          

LOW 

HIGH          

LOW 

   Q1  

$301.02 

$242.07

   Q1  

$480.18 

$334.40

2016

   Q2  

$292.69 

$223.02

2015

   Q2  

$432.88 

$368.88

   Q3  

$333.65 

$240.07

   Q3  

$412.24 

$265.00

   Q4  

$329.83 

$268.00

   Q4  

$311.65 

$254.00

About the Cover

Kernen and Braeden, siblings who both have spinal muscular atrophy (SMA). In 2016, Biogen launched the 

fi rst and only treatment for SMA in the US and today is working to bring the therapy to patients worldwide.

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FINANCIAL  
HIGHLIGHTS

Revenues
($ in millions)

GAAP Diluted EPS

Non-GAAP Diluted EPS*

Free Cash Flow*
($ in millions)

2012

2013

2014

2015

2016

2012

2013

2014

2015

2016

2012

2013

2014

2015

2016

2012

2013

2014

2015

2016

$5,516

$6,932 

$9,703

$10,764

$11,449

+6%

$5.76

$7.81

$12.37

$15.34

$16.93

$6.53

$8.96

$13.83

$17.01

$20.22

+10%

+19%

$1,625

$2,084

$2,279

$2,223

$2,706

+22%

*  Non-GAAP diluted Earnings Per Share (EPS) and free cash flow are non-GAAP financial measures. A reconciliation of GAAP 

to non-GAAP diluted EPS and free cash flow amounts is set forth on pages 15 and 16 of this annual report.

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DEAR FELLOW 
SHAREHOLDERS:

I am honored and humbled to write to you as the new CEO of Biogen, a company that for nearly four 
decades has maintained an unwavering commitment to transforming the lives of patients and pursuing 
some of the most diffi cult challenges in medicine. It is a remarkable time to lead this company as we 
move into the next phase of our evolution and expand our focus on developing breakthrough treatments 
with a priority in neurology and neurodegeneration. 

  “

Today we are working to 

reinforce the core of our 

business, optimizing the 

value of our portfolio and 

increasing our overall 

commitment to long-term 

Biogen’s heritage is rooted in an ability to translate innovative science into real 

patient benefi ts. This has been central to our mission and vital to our growth. Under 

my predecessor, George Scangos, Biogen had the most productive years in its 

history, both in its growth and the introduction of new medicines. I am fortunate to 

have inherited a company with a strong and healthy commercial business and a rich 

foundation in science; one that is well-positioned to pursue a promising pipeline with 

value creation for our 

shareholders.

  “

truly novel programs.

Today we are working to reinforce the core of our business, optimizing the value of 

our portfolio and increasing our overall commitment to long-term value creation for 

our shareholders. As a company we need to be increasingly nimble and agile, working 

to meet the needs of our worldwide customer base and dedicated to compliance 

and integrity. We need to be an organization that attracts the very best people and 

develops the remarkable talent that is the foundation and future of our company.  

In 2016 we delivered strong performance, with $11.4 billion in full year total 

revenues, a six percent increase over 2015. During this period, full year GAAP diluted 

earnings per share (EPS) grew 10 percent as compared with 2015. Throughout 2016, 

we launched four new therapies, continued to be the leader in multiple sclerosis (MS), 

and saw strong uptake in our emerging biosimilars business. 

But it was the approval of SPINRAZATM for the treatment of spinal muscular atrophy 

(SMA) that demonstrated the kind of breakthrough medicine we aspire to develop 

as we pursue truly transformative therapies in critical areas of unmet need. Through 

novel science, innovative trial design, and collaborative relationships with patient 

advocates and industry partners, we brought forth the fi rst and only approved therapy 

2           2 0 1 6   A N N U A L   R E P O R T

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MICHEL VOUNATSOS 

Chief Executive Officer

Landon & Ruby
Spinal muscular atrophy patients

  “ We all have challenges and if I knew what  

other people’s challenges were, I’d probably 

keep my own.

  “

Dany, mother of Landon and Ruby

4           2 0 1 6   A N N U A L   R E P O R T

to treat this rare motor neuron disease. And we 

did so with remarkable efficiency, moving from 

initial dosing in patients to US approval in only 

five years. 

The successful launch of SPINRAZA in the US 

and markets around the world is a key priority 

for us in 2017 as we work with the utmost 

urgency to deliver this therapy to the patients 

and families who so desperately need it.

As we continue to advance our neurology 

research, we will be assertive, deliberate, 

and disciplined in setting a path forward 

for the company. We demonstrated that 

mindset with the successful spin off of our 

hemophilia business. By putting that portion 

of the company in the hands of a dedicated 

management team, we believe the new 

company – Bioverativ – can deliver greater 

advancements for patients and returns for 

its shareholders. Earlier this year we also 

made the important decision to enter into 

a settlement and license agreement with 

Forward Pharma that we believe clarifies 

and strengthens the intellectual property for 

TECFIDERA®, the leading oral therapy for MS. 

The agreement brings greater certainty to  

our business and allows us to focus on  

our priorities.

We are working to improve commercial 

execution, enhance our geographic footprint, 

and continue to bolster our MS franchise. As 

CEO, I will work with our senior management to 

evaluate all aspects of our business to ensure 

that we are acting in the best interests of our 

shareholders. 

We will focus on building our pipeline and 

are actively pursuing a mix of pre-clinical 

MS PATIENTS 
Treated with our Medicines

38%

MS PATIENTS GLOBALLY

42%

MS PATIENTS IN OUR  
DIRECT MARKETS

and early-stage compounds. There is little 

As competition intensifi es, we anticipate that 

question that today we are a company at the 

price will be a key focus in the MS market. 

forefront of research and development in 

We are committed to working with payers to 

neuroscience – and we remain committed 

explore innovative value-based approaches 

to this critical area where there is so much 

to contracting, while generating real-world 

unmet need, as we look to turn our leading 

data on the value our products provide. 

science into novel therapies. Developing and 

expanding our neurology portfolio is core 

I believe our most exciting commercial 

to our mission. This is an area where we 

opportunity in 2017 is the launch of 

believe we have both the world-class team 

SPINRAZA for SMA. There is signifi cant 

and the development experience to lead. 

demand for SPINRAZA and we anticipate 

Commercial Performance 
and Opportunities 

a gradual uptake throughout the year as 

treatment centers manage the complexities 

in administration and insurers develop 

coverage policies. Our goal is that no patient 

Today, Biogen remains the global leader in 

will forgo treatment because of fi nancial 

all three segments of the MS market: oral, 

limitations or insurance status. Navigating 

high-effi cacy, and interferons. In 2016, 

these dynamics will be our central focus over 

we continued to increase the number of 

the next 12 months. We are also working 

patients treated with a Biogen product even 

to make SPINRAZA available to a broad 

in the face of growing competition. At the 

global patient population, with regulatory 

end of 2016, 38 percent of all MS patients 

applications pending in the EU, Japan, 

globally and 42 percent of all MS patients in 

Australia, and Canada.

our direct markets were treated with one of 

our medicines. 

We are also very pleased with the launch 

of our biosimilars portfolio in Europe. 

TECFIDERA was a major driver of our revenue 

We believe that this business – which is 

growth in 2016, with total patient growth of 

already profi table and includes the anti-

nine percent globally. In addition, TYSABRI® 

TNFs BENEPALI® (an etanercept biosimilar 

further strengthened its position in the 

referencing Enbrel®) and FLIXABI® (an 

market. We believe this is due to an improved 

infl iximab biosimilar referencing Remicade®) 

safety perception in the US and a shift away 

– can be a key contributor to our business 

from platform therapies to high-effi cacy and 

in the future. In some European markets, we 

oral products. Moving forward, we expect 

are already the overall etanercept segment 

our ongoing rollout of ZINBRYTA® in global 

leader, a testament to the quality of the 

markets to further strengthen our position 

product and the value it brings to patients. 

in the high-effi cacy segment. We are also 

looking at new approaches to commercial 

As we go forward, we will closely evaluate 

growth and strengthening our MS leadership, 

opportunities to optimize our biosimilars 

including an increased emphasis on life-cycle 

joint venture with Samsung Bioepis, which 

management opportunities. 

has a broad pipeline including biosimilars 

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B I O G E N      5

  “

2016 was a positive 

year for the company but 

also put a spotlight on 

areas that demand more 

referencing top-selling therapies such as 

of this neurodegenerative disease and fi nd 

Lantus®, Herceptin®, and Avastin®. Our 

Herce

treatments will be a tremendous public 

biosimilar referencing Humira® has been 

health breakthrough, and we intend to be 

fi led with European regulators and in 2017 

among the fi rst companies to do so.

attention. I believe we can 

we will evaluate additional opportunities, 

become a more efficient 

company, making greater 

use of technology and 

digital insights to build 

our portfolio and work to 

create more innovative 

and personalized 

customer engagements.

  “

including our option to acquire a 49.9 

Based on the recent outcomes of our own 

percent equity stake in the joint venture. We 

research – as well as certain fi ndings from 

have seen strong demand for these high-

others – we continue to believe that beta 

quality biosimilar offerings and the potential 

amyloid represents a valid and important 

for further growth and we will continue our 

therape
therapeutic target. Early data suggest that 

work to increase access to these therapeutic 

treatment with aducanumab, our most 

options for patients, payers, and providers 

advanced Alzheimer’s candidate, may have 

throughout Europe.  

a clinically meaningful effect on cognitive 

decline. We have committed signifi cant 

2016 was a positive year for the company 

resources to two large-scale Phase 3 trials 

but also put a spotlight on areas that 

to confi rm these benefi ts and the enrollment 

demand more attention. I believe we can 
demand

in these studies is a top priority. Our partner 

become a more effi cient company, making 

Eisai has also commenced a Phase 3 trial for 

greater use of technology and digital insights 

elenbecestat, a BACE inhibitor, which targets 

to build our portfolio and work to create 

amyloid through a different mechanism than 

more innovative and personalized customer 

aducanumab. 

engagements. To continue to expand our MS 

franchise, I believe we need to evolve our 

We believe that the underpinnings 

customer-centered engagement strategy, 

of Alzheimer’s pathophysiology may 

operating in new channels and leveraging 

be multifaceted, perhaps requiring a 

deeper analytics. Biogen’s advantage is its 

combination or sequence of therapies, and 

leading therapeutic portfolio and its science 

we continue to investigate other therapeutic 

focus and we must build on those strengths 

approaches. These include an anti-tau 

with a growth and winning mindset. 

antibody developed using the same reverse-

Our Pipeline and Focus 
on Transforming Neurology

translational medicine program that was used 

to create aducanumab, and an antisense 

oligonucleotide being developed with Ionis 

Pharmaceuticals, also targeting tau.  

SPINRAZA is an example of the kind of 

transformative advance we look to pursue 

We also remain fully committed to new 

in neurology. And we believe we are at 

therapeutic approaches for transforming the 

the forefront of a similar transformation 

treatment of MS and unlocking a pathway to 

in the treatment of Alzheimer’s disease. 

neuro-repair through remyelination. Although 

Alzheimer’s disease is unquestionably 

we reported in 2016 that a Phase 2 study of 

one of today’s leading epidemiologic 

our remyelination candidate opicinumab did 

priorities; to better understand the puzzle 

not meet its primary endpoints, a post-hoc 

6           2 0 1 6   A N N U A L   R E P O R T

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JULIE
Multiple sclerosis patient

    “As I learned to manage my health care and 

my condition, I learned that it’s not only being 

transparent about what’s going on in my life 

and my physical responses, but your emotional 

responses when you’re living with MS are just as 

important.   “

8           2 0 1 6   A N N U A L   R E P O R T

analysis of that trial demonstrated a benefit in 

a study subgroup. We believe there is a path 

forward and are planning to initiate a Phase 2b 

study based on this analysis in 2017. 

Beyond our novel pipeline compounds, we 

are exploring the potential of natalizumab 

(TYSABRI) to address cognitive and functional 

deficits caused by acute ischemic stroke, 

one of the leading causes of death and 

neurological disability worldwide. 

We also have several exciting early-stage 

assets to treat other neurological diseases 

with enormous unmet medical need. In 

Parkinson’s disease and amyotrophic lateral 

sclerosis (ALS) – two debilitating diseases for 

which few if any effective treatments exist –  

we hope to demonstrate clinical effect in 

Phase 1 trials that are currently underway,  

with an eye toward advancing those 

development programs in the coming years.  

Finally, as we look to advance our ability to 

transform outcomes for chronic diseases, we 

have forged a multi-year alliance with one of 

the leading institutions in the field of gene 

therapy – the University of Pennsylvania –  

to create a therapeutic platform for a broad 

range of diseases. Working with pioneers 

in the field, we will explore next-generation 

delivery in various tissues such as the retina, 

skeletal muscle, and central nervous system 

to determine the potential for extending gene 

therapy into a broader spectrum of complex 

diseases, including neurological conditions 

with SMA as a priority. 

The strength of our current pipeline is one 

of the reasons why I chose to join Biogen. It 

has the vast potential to help underserved 

patients while driving future shareholder value. 

But good is never good enough. In the coming 

year, we will seek opportunities to augment 

the pipeline through strategic acquisitions and 

research collaborations as we work to become 

the partner of choice in the study and creation 

of new therapies for previously untreatable 

neurologic conditions. 

Honoring our Commitments 
to Patients and Society

As we continue to evolve as an organization, 

we remain fully committed to excellence in all 

areas of our performance, including corporate 

citizenship. Thanks to the dedication of our 

employees and the strength of our programs 

in such areas as diversity, inclusion, and 

environmental sustainability, Biogen continues 

to garner the respect and admiration of its peers 

and the communities in which it operates. 

Recognizing a societal obligation to inspire and 

train the next generation of innovators, Biogen’s 

pioneering Community Labs continue to lead 

the way in STEM education. During 2016, 

nearly 5,000 young students trained in our 

laboratories in Cambridge, Massachusetts and 

Research Triangle Park, North Carolina, gaining 

invaluable hands-on experience and exposure 

to the breadth of career opportunities in the 

life sciences. Since Biogen’s first Community 

Lab opened its doors in 2002, more than 

40,000 students have learned through scientific 

experimentation in our facilities and it has 

become a model for the industry. 

The Biogen Foundation continues its important 

work to train the next generation of scientists 

and educators by partnering with organizations 

that provide key learning opportunities for 

underprivileged students, develop teacher 

KAI
Multiple sclerosis patient

  “ I realize that my slow walk might be the best 
and everything will happen in its own time.   “

sprint of my life. I just have to keep my own pace 

B I O G E N           9

Leading the Way
 in STEM Education

training programs, and help increase the 

within view. As members of the vibrant 

number of under-represented minorities 

r of und

biopharmaceuticals industry, we are working 

in the health profession and biomedical 

constantly to defi ne the value of our therapies 

40,000+

STUDENTS TRAINED IN 
OUR LABORATORIES

sciences. 

to patients, payers, and health care systems. 

And as global citizens, we are facing potential 

Our patient assistance programs and 

changes that may impact the ways in which 

services also remain a critical resource for 

we do business. 

our patients. We continued this commitment 

with the launch of a substantial Expanded 

Today, we are in a position to attract, partner 

Access Program for SPINRAZA in markets 

with, and acquire assets and opportunities 

around the world and the rollout of a 

that complement our core business as we 

comprehensive patient program in the US 

prioritize our work in neuroscience. This 

called SMA 360oTM.  AboveMS®, our support 

is where public health is mandating that 

program for MS patients, served thousands 

the industry lead and we intend to answer 

last year and Biogen continues to offer 

that call. An evolving payer landscape 

co-pay assistance – and in some instances 

and possible changes to the regulatory 

free drugs – to ensure that all those who 

environment are likely to impact our industry, 

need our medicines can get them.

but we will approach these variables with the 

same precision, diligence, and determination 

As a carbon neutral company, we continue 

that we apply to our pursuit of new medicines. 

to work proactively to improve the quality of 

our environment and measure the impact 

In the year ahead, we will look to take 

of our footprint. We are proud to remain a 

calculated risks as we add to our pipeline 

leader in key measures including the Dow 

and expand our global footprint. We will 

Jones Sustainability Index. By thoughtfully 

evolve our commercial model and bolster our 

deploying our resources – whether through 

business development capabilities to execute 

our capital, our medicines, or human talent – 

on new opportunities. As we approach 

we will succeed not only as a company but as 

Biogen’s 40th anniversary, I am energized by 

a valued and valuable contributor to society 

the opportunity to translate our mission into 

as a whole. 

Looking Ahead

Biogen is at the center of a dynamic and 

growing industry. As scientists and drug 

developers, we are on the precipice of 

unlocking the mysteries of many diseases 

of the brain, which means life-changing 

medicines for millions of people are 

a compelling vision of growth and innovation 

and to work with our employees around the 

world to defi ne the next 40 years for our 

company, our patients, and society.  

Michel Vounatsos 
Chief Executive Officer

1 0           2 0 1 6   A N N U A L   R E P O R T

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PHASE 1 

PHASE 2      PHASE 3       FILED

PRODUCT PIPELINE

Targeting Areas of High Unmet Medical Need

Aducanumab (Aß mAb)*

ALZHEIMER’S 
DISEASE

E2609 (BACE inhibitor)*

BAN2401 (Aß mAb)*

TRIGEMINAL 
NEURALGIA

BIIB074‡ (Nav1.7 inhibitor)

LUMBOSACRAL 
RADICULOPATHY

BIIB074‡ (Nav1.7 inhibitor)

ERYTHROMELALGIA

BIIB074‡ (Nav1.7 inhibitor)

MULTIPLE 
SCLEROSIS

ACUTE 
ISCHEMIC 
STROKE

Opicinumab (anti-LINGO-1)

BIIB061 (Oral remyelination)

Natalizumab (4-integrin inhibitor)

1 2       2 0 1 6  A N N U A L  R E P O R T

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PHASE 1 

PHASE 2      PHASE 3       FILED

X-LINKED 
RETINOSCHISIS 
(PHASE 1/2)

IDIOPATHIC 
PULMONARY 
FIBROSIS

LUPUS

XLRS Gene Therapy*

BG00011 (STX-100)

Dapirolizumab pegol (anti-CD40L)*

BIIB059 (anti-BDCA2)

PARKINSON’S 
DISEASE

BIIB054 (anti-a-synuclein) 

SOD1-ALS#

BIIB067 (IONIS-SOD-1Rx)*

AUTOIMMUNE

BIIB068 (BTK inhibitor)

MULTIPLE 
IMMUNOLOGY 
INDICATIONS 
IN EUROPE

Biosimilar adalimumab*

NOTE: OCREVUS® (ocrelizumab) has been approved in the US and filed in the EU by Roche for primary progressive and relapsing forms of  
MS. Roche also reported positive Phase 3 data for GAZYVA ® (obinutuzumab) in front-line indolent Non-Hodgkin’s Lymphoma. Biogen has  
a financial interest in both OCREVUS and GAZYVA.
*  Collaboration programs  
‡ Formerly referred to as Raxatrigine 
# Amyotrophic Lateral Sclerosis 

B I O G E N      1 3

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EXECUTIVE COMMITTEE

 (Left to Right)

Paul McKenzie, Ph.D.
Executive Vice President,
Pharmaceutical Operations & Technology

Alfred W. Sandrock, Jr., M.D., Ph.D.
Executive Vice President and Chief Medical Officer

Susan H. Alexander
Executive Vice President, Chief Legal,  
Corporate Services and Secretary

Michel Vounatsos
Chief Executive Officer 

Kenneth DiPietro
Executive Vice President,
Human Resources

Michael Ehlers, M.D., Ph.D.
Executive Vice President,  
Research & Development

Paul J. Clancy
Executive Vice President,  
Finance and Chief Financial Officer

 
 
FINANCIALS

GAAP to Non-GAAP Reconciliation

DILUTED EPS AND NET INCOME ATTRIBUTABLE TO BIOGEN INC.  
(Unaudited, $ in millions, except per share amounts)  

FY              2012  

2013 

2014      2015     

2016

GAAP Diluted EPS 

$5.76  

 $7.81  

 $12.37  

 $15.34   $16.93

Adjustments to net income attributable to Biogen Inc. (see below)  

0.77  

 1.15  

 1.46  

 1.67  

3.29 

Non-GAAP diluted EPS    

$6.53  

 $8.96  

 $13.83  

 $17.01  

$20.22

GAAP Net Income Attributable to Bio gen Inc. 

 $1,380  

 $1,862  

 $2,935  

 $3,547  

 $3,703 

TECFIDERA litigation settlement and license charges A 

 -    

 -    

 -    

 -    

 455 

Amortization of acquired intangible assets 

 194  

 331  

 473  

 365  

 374 

(Gain) loss on fair value remeasurement of contingent consideration  

 27  

 (1) 

 (39) 

 31  

(Gain) loss on deconsolidation of variable interest entities 

Hemophilia business separation costs 

Restructuring, business transformation and other cost-saving initiatives:  

Restructuring chargesB 

Cambridge manufacturing facility rationalization costs C 

Weston exit costs D 

Donation to Biogen Foundation 

 -    

 -    

2  

 -    

 -    

 -    

 -    

 -    

 -    

 -    

 27  

 -    

Stock option expense and other    

17  

 10  

 -    

 -    

 -    

 -    

 -    

 35  

 12  

 -    

 -    

 93  

 -    

 -    

 -    

 -    

 15 

 (4)

 18 

 33 

 55 

 -   

 -   

 -   

Income tax effect related to reconciling items 

 (53) 

 (93) 

 (135) 

 (104) 

 (225)

Non-GAAP Net Income Attributable to Biogen Inc.  

 $1,567  

 $2,136  

 $3,281  

 $3,932  

 $4,423

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B I O G E N      1 5

 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
FINANCIALS

 (Continued from previous page)

FREE CASH FLOW RECONCILIATION   
(unaudited, $ in millions) 

FY              2012  

2013 

2014      2015     

2016

Net cash flows provided by operating activities   

 $1,880  

 $2,345  

 $2,942  

 $3,716  

 $4,522 

Purchases of property, plant and equipment (Capital Expenditures) 

 255  

 246  

 288  

 643  

 616 

Contingent consideration related to Fumapharm AG acquisition 

 -    

 15  

 375  

 850  

 1,200 

Free Cash Flow 

 $1,625  

 $2,084  

 $2,279  

 $2,223  

 $2,706 

A  Under our settlement and license agreement with Forward Pharma A/S (Forward Pharma), we paid Forward Pharma $1.25 billion in cash.  

The $455 million pre-tax charge recognized during the twelve  months ended December 31, 2016 represents the portion of the $1.25  

billion cash payment that is attributable to our sales of TECFIDERA during the period April 2014 through December 31, 2016.   

B  Restructuring charges for the twelve months ended December 31, 2016 and 2015 include $8 million and $93 million, respectively,  of 

costs incurred in connection with our 2015 corporate restructuring.  Restructuring charges for the twelve  months ended December 31, 

2016 also includes charges of $18 million incurred in connection with additional cost-savings measures primarily intended to realign  

our organizational structure in anticipation of the changes in roles and workforce resulting from our decision to  spin off our hemophilia 

business, and to achieve further targeted cost reductions and $7 million related to employee separation costs as a result of our decision  

to vacate and cease manufacturing in Cambridge, MA and vacate our warehouse in Somerville, MA.

C   Cambridge manufacturing facility rationalization costs reflect additional depreciation, the write-down of excess inventory and other direct  

costs associated with our decision to vacate and cease manufacturing in Cambridge, MA and vacate our warehouse in Somerville, MA.  

Additional depreciation expense, which totaled $46 million for the twelve months ended December 31, 2016, is included in cost of  sales, 

excluding amortization of acquired intangible assets in our condensed consolidated statements  of income. Also reflected in this  amount 

for the twelve months ended December 31, 2016 are charges of $7 million for the write-down of excess inventory, which are included in  
cost of sales, excluding amortization of acquired intangible assets in our condensed consolidated statements of income.

D   This change represents the remaining lease obligation for the vacated portion of our Weston facility, net of sublease income upon reloca-

tion of our headquarters to Cambridge, MA.

NOTES: Our “Non-GAAP net income attributable to Biogen Inc.” and “Non-GAAP earnings per share - Diluted” fi nancial measures exclude the 

following items from “GAAP net income attributable to Biogen Inc.” and “GAAP earnings per share - Diluted”: (1) purchase accounting and  

merger-related adjustments, (2) hemophilia business separation costs, (3) restructuring, business  transformation and other cost-saving ini-

tiatives, (4) stock option expense, (5) other select items, and (6) their related tax effects. Free cash fl  ow is defi ned as net cash fl ows provided 

by operating activities less purchases of property, plant and equipment and contingent consideration related to acquisition of Fumapharm  

AG as disclosed within our Form 10-K. We believe that the disclosure of these Non-GAAP fi nancial measures provides additional insight into 

the ongoing economics of our business and refl ects how we manage our business internally, set operational goals and forms the basis of our  

management incentive programs. These Non-GAAP fi nancial measures are not in accordance with generally accepted accounting principles  

in the United States and should not be viewed in isolation or as a substitute  for reported, or GAAP, net income attributable to  Biogen Inc. and 

diluted earnings per share. Numbers may not foot due to rounding. Additional reconciliations of our Non-GAAP fi nancial measures can be 

found in the Investors section of www.biogen.com. 

1 6       2 0 1 6  A N N U A L  R E P O R T

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SAFE HARBOR: This annual report contains forward-looking statements, including statements regarding our goals, prospects and business 

strategies, potential of recently launched products, our pipeline and the development of new treatments and biosimilars, anticipated regulatory 

filings and actions, anticipated data readouts, and research and development and business development activities. These forward-looking  

statements may be accompanied by such words as “anticipate,” “believe,” “could,” “estimate,” “expect,” “forecast,” “intend,” “may,” 

“plan,” “potential,” “project,” “target,” “will” and other words and terms of similar meaning. You should not place undue reliance on these 

statements. These statements involve risks and uncertainties that could cause actual results to differ materially from those reflected in 

such statements, including: our dependence on sales from our principal products; failure to compete effectively due to significant product 

competition in the markets for our products; difficulties in obtaining and maintaining adequate coverage, pricing and reimbursement for 

our products; risks associated with current and potential future health care reforms; the occurrence of adverse safety events, restrictions 

on use with our products or product liability claims; failure to protect and enforce our data, intellectual property and other proprietary rights 

and the risks and uncertainties relating to intellectual property claims and challenges; uncertainty of long-term success in developing, 

licensing or acquiring other product candidates or additional indications for existing products; risks associated with clinical trials, including 

our ability to adequately manage clinical activities, unexpected concerns that may arise from additional data or analysis obtained during 

clinical trials, regulatory authorities may require additional information or further studies or may fail to approve or may delay approval of 

our drug candidates; the risk that positive results in a clinical trial may not be replicated in subsequent or confirmatory trials or success in 

early-stage clinical trials may not be predictive of results in later-stage or large-scale clinical trials or trials in other potential indications; 
problems with our manufacturing processes; our dependence on collaborators and other third parties for the development and commer-

cialization of products and other aspects of our business, which are outside of our control; failure to manage our growth and execute our 

growth initiatives; failure to achieve the anticipated benefits and savings from our corporate restructuring efforts; risks relating to technolo-

gy failures or breaches; failure to comply with legal and regulatory requirements; risks related to indebtedness; the risks of doing business 

internationally, including currency exchange rate fluctuations; charges and other costs relating to our properties; fluctuations in our effective 

tax rate; risks relating to investment in and expansion of manufacturing capacity for future clinical and commercial requirements; the mar-

ket, interest and credit risks associated with our portfolio of marketable securities; risks relating to our ability to repurchase stock, including 

at favorable prices; risks relating to access to capital and credit markets; environmental risks; risks relating to the sale and distribution by 

third parties of counterfeit versions of our products; risks relating to the use of social media for our business; change in control provisions 

in certain of our collaboration agreements; and the other risks and uncertainties that are described in the Risk Factors section of our most 

recent annual or quarterly report and in other reports we have filed with the SEC. These statements are based on our current beliefs and 

expectations and speak only as of April 1, 2017. We do not undertake any obligation to publicly update any forward-looking statements. 

NOTE REGARDING TRADEMARKS: BENEPALI®, BIOGEN®, FLIXABI®, TECFIDERA®, TYSABRI®, and ZINBRYTA® are registered trademarks of 
Biogen. SPINRAZATM is a trademark of Biogen. All other trademarks are the intellectual property of their respective owners.

B I O G E N           1 7

1 8       2 0 1 6  A N N U A L  R E P O R T

B I O G E N      1 6

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 10-K

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2016

or

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
(State or other jurisdiction of incorporation or organization)

33-0112644
(I.R.S. Employer Identification No.)

225 Binney Street, Cambridge, Massachusetts 02142
(617) 679-2000
(Address, including zip code, and telephone number, including area code, of Registrant’s principal executive offices)
Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class
Common Stock, $0.0005 par value

Name of Each Exchange on Which Registered
The Nasdaq Global Select Market

Securities registered pursuant to Section 12(g) of the Act:
None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities

Act.    Yes 

       No

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the 

Act.    Yes

        No 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of 
the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was 
required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes

      No 
Indicate by check mark whether the registrant has submitted electronically 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 

        No

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained 

herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements 
incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.   

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 

or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting
company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer 

  Accelerated filer 

Non-accelerated filer 
(Do not check if a smaller reporting company)

  Smaller reporting company 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the 

Act).    Yes 

        No 

The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant (without admitting

that any person whose shares are not included in such calculation is an affiliate) computed by reference to the price at
which the common stock was last sold as of the last business day of the registrant’s most recently completed second
fiscal quarter was $52,843,669,823.

As of January 27, 2017, the registrant had 215,951,945 shares of common stock, $0.0005 par value, outstanding.

Portions of the definitive proxy statement for our 2017 Annual Meeting of Stockholders are incorporated by reference 

into Part III of this report.

DOCUMENTS INCORPORATED BY REFERENCE

 
 
 
BIOGEN INC.
ANNUAL REPORT ON FORM 10-K
For the Year Ended December 31, 2016
TABLE OF CONTENTS

Item 1.

Business

Item 1A.
Item 1B. Unresolved Staff Comments

Risk Factors

Properties

p

Legal Proceedings

g

g

y
Mine Safety Disclosures

Item 2.

Item 3.

Item 4.

Item 5.

Item 6.

Item 7.

PART I

PART II

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer 
g
Purchases of Equity Securities
q
Selected Financial Data

y,

q

y

Management’s Discussion and Analysis of Financial Condition and Results of 
g
Operations
Q

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Q

p

y

Item 8.
Item 9.

Item 9A.

Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial 
g
Disclosure
Controls and Procedures

pp

g

g

y

Item 9B. Other Information

PART III

Item 10. Directors, Executive Officers and Corporate Governance

p

,

Item 11.
Item 12.

Item 13.

p

Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related 
Stockholder Matters
p
Certain Relationships and Related Transactions, and Director Independence

p

p

g

y

,

Item 14.

g
Principal Accounting Fees and Services

p

Item 15.

Exhibits and Financial Statement Schedules

PART IV

g

Signatures
Consolidated Financial Statements
Exhibit Index

Page

1
29

41

42

43

43

44

46

48

79

81

81

82
82

83

83

83

83

83

84

85
F- 1

A- 1

 
 
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,” “project,” “target,” “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 spin off of our hemophilia business, including its anticipated benefits, costs and tax treatment;

the anticipated amount and timing of payments under the Settlement and License Agreement with Forward
Pharma A/S (Forward Pharma) and the timing, outcome and impact of administrative, regulatory, legal and other 
proceedings related to our patents and other proprietary intellectual property rights under our agreement with 
Forward Pharma;

•  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;

•  potential costs and expenses incurred in connection with corporate restructurings and to execute business

transformation and optimization initiatives;

•  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 expected financial impact of ceasing manufacturing activities and vacating our biologics manufacturing 
facility in Cambridge, MA and warehouse space in Somerville, MA;

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 constrain 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 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.

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.); and

•  “ANGIOMAX” refers to both ANGIOMAX (the trade name for bivalirudin in the U.S., Canada and Latin America) 

and ANGIOX (the trade name for bivalirudin in Europe).

NOTE REGARDING TRADEMARKS

AVONEX®, BENEPALI®, FLIXABI®, PLEGRIDY®, RITUXAN®, TECFIDERA®, TYSABRI® and ZINBRYTA® are

registered trademarks of Biogen. FUMADERMTM and SPINRAZATM are trademarks of Biogen. ALPROLIX®, ELOCTATE®,
ENBREL®, FAMPYRATM, GAZYVA®, HUMIRA®, OCREVUS®, REMICADE® and other trademarks referenced in this 
report are the property of their respective owners.

Item 1.  

Business

Overview

PART I

Biogen is a global biopharmaceutical company focused on discovering, developing, manufacturing and 

delivering therapies to people living with serious neurological, rare and autoimmune diseases.

Our marketed products include TECFIDERA, AVONEX, PLEGRIDY, TYSABRI, ZINBRYTA and FAMPYRA for multiple
sclerosis (MS), FUMADERM for the treatment of severe plaque psoriasis and SPINRAZA for the treatment of spinal
muscular atrophy (SMA). 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 and other potential anti-CD20 therapies under a collaboration
agreement with Genentech, Inc. (Genentech), a wholly-owned member of the Roche Group (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. For nearly two decades we have led in the research and 
development of new therapies to treat MS, resulting in our leading portfolio of MS treatments. Now our research is
focused on additional improvements in the treatment of MS, such as the development of next generation therapies
for MS, with a goal to reverse or possibly repair damage caused by the disease. We are also applying our scientific 
expertise to solve some of the most challenging and complex diseases, including Alzheimer's disease, Parkinson's 
disease and amyotrophic lateral sclerosis (ALS), and are 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 this agreement, we are currently 
manufacturing and commercializing two anti-tumor necrosis factor (TNF) biosimilars in certain European Union (E.U.)
countries.

1

Key Developments

During 2016 we had a number of key developments affecting our business.

Corporate Matters

Hemophilia Spin-Off

Management Changes 

In May 2016 we announced our intention to spin 

During 2016 we appointed several new 

off our hemophilia business, Bioverativ Inc. 
(Bioverativ), as an independent, publicly traded 
company. 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. 
Bioverativ will also assume 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. (Sangamo).

On February 1, 2017, we completed the
distribution of all the then outstanding shares of 
common stock of Bioverativ to Biogen stockholders, 
who received one share of Bioverativ common stock 
for every two shares of Biogen common stock. As a 
result of the distribution, Bioverativ is now an
independent public company whose shares of 
common stock are trading under the symbol "BIVV" 
on the Nasdaq Global Select Market.

The financial results of Bioverativ are included in 

our consolidated results of operations and financial
position in our audited consolidated financial 
statements for the periods presented in this Form 10-
K. The financial results of Bioverativ will be excluded 
from our consolidated results of operations and 
financial position commencing February 1, 2017. For 
additional information regarding the separation of 
Bioverativ, please read Note 26, Subsequent Events to
our consolidated financial statements included in this 
report.

executives, each of whom has significant experience 
in the biopharmaceutical industry and is a leader in 
his or her functional area. These include Michel 
Vounatsos, Chief Executive Officer, Michael D. Ehlers, 
Executive Vice President, Research and Development
and Paul McKenzie, Executive Vice President, 
Pharmaceutical Operations and Technology. For 
additional information related to these and our other 
Executive Officers, please read "Our Executive 
Officers" included in this report.

Cost Saving Initiatives

In 2016 we initiated cost saving measures

intended to realign our organizational structure in 
anticipation of the changes in roles and workforce 
resulting from our decision to spin off our hemophilia
business, as well as to achieve further targeted cost 
reductions. 

In December 2016 after an evaluation of our 

manufacturing capacity and needs, we ceased
manufacturing at our Cambridge, MA manufacturing 
facility and subleased our rights to this facility to
Brammer Bio MA, LLC (Brammer). In addition to the
sublease, Brammer purchased certain leasehold 
improvements and other assets at this facility and
agreed to provide certain manufacturing and other 
transition and support services to us.

TECFIDERA Settlement and License Agreement

In January 2017 we agreed to enter into a 
settlement and license agreement with Forward 
Pharma A/S (Forward Pharma). The settlement and 
license agreement provides us an irrevocable license 
to all intellectual property owned by Forward Pharma 
and results in the termination of the German
Infringement Litigation. Under the terms of the
settlement and license agreement with Forward 
Pharma, 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 matter. For more information on the settlement
and license agreement please read Note 21, 
Commitments and Contingencies to our consolidated 
financial statements included in this report.

2

Product/Pipeline Developments

TYSABRI (natalizumab)

Multiple Sclerosis

In June 2016 the European Commission (EC) approved a variation to the marketing authorization of TYSABRI,
which extended its indication to include relapsing-remitting MS patients with highly active disease activity
despite a full and adequate course of treatment with at least one disease modifying therapy. TYSABRI was
previously indicated only for patients who had failed to respond to beta-interferon or glatiramer acetate in the
E.U.

ZINBRYTA (daclizumab)

ZINBRYTA was approved for the treatment of relapsing forms of MS in the U.S. in May 2016 and the E.U. in
July 2016.

Opicinumab (Anti-LINGO-1)

In June 2016 we reported top-line results from SYNERGY, our Phase 2 trial evaluating opicinumab in people
with relapsing forms of MS. Opicinumab did not meet the primary endpoint or its secondary efficacy endpoint.
However, based on these results, there was a subset of patients within the study that we believe have
potential to benefit from treatment, and we are therefore planning another Phase 2 clinical trial related to
opicinumab.

Aducanumab (BIIB037)

Neurodegeneration

In June 2016 we announced that aducanumab, our investigational treatment for early Alzheimer’s disease,
was accepted into the European Medicines Agency's (EMA's) Priority Medicines (PRIME) program. PRIME aims
to bring treatments to patients more quickly by enhancing the EMA's support for the development of
investigational medicines for diseases without available treatments or in need of better treatment options.

In September 2016 aducanumab was granted "Fast Track" designation by the U.S. Food and Drug
Administration (FDA). The FDA’s Fast Track program supports the development of new treatments for serious
conditions with an unmet medical need such as Alzheimer’s disease.

In September 2016 we announced that efficacy and safety data from an additional interim analysis from our
Phase 1b study of aducanumab in early Alzheimer's disease were consistent with results previously reported
from the Phase 1b study.

In December 2016 we presented new data from the Phase 1b study of aducanumab, which included interim
results from the titration cohort of the placebo-controlled period of the Phase 1b study as well as data from
the first year of the long-term extension. The results supported the ongoing Phase 3 studies of aducanumab
for early Alzheimer’s disease.

SPINRAZA (nusinersen)

Rare Diseases

In August 2016 we and Ionis Pharmaceuticals, Inc. (Ionis) announced that SPINRAZA met the primary
endpoint for the interim analysis of ENDEAR, the Phase 3 trial evaluating SPINRAZA in infantile-onset
(consistent with Type 1) SMA. Based on these results, we exercised our option under our collaboration
agreement with Ionis to assume development and commercialization of SPINRAZA, and paid Ionis a $75.0
million license fee in connection with our option exercise.

In September 2016 we completed the rolling submission of a New Drug Application (NDA) to the FDA for the
approval of SPINRAZA, and in October 2016 we filed a marketing authorization application (MAA) with the
EMA, which had already granted Accelerated Assessment status to SPINRAZA. These applications have been
accepted for review by the applicable regulatory authorities.

In October 2016 we dosed our first patient in our infantile-onset SMA Expanded Access Program to provide
patient access to SPINRAZA.

In November 2016 we and Ionis announced that SPINRAZA met the primary endpoint for the interim analysis
of CHERISH, the Phase 3 trial evaluating SPINRAZA in later-onset (consistent with Type 2) SMA. The analysis
found that children receiving SPINRAZA experienced a highly statistically significant improvement in motor
function compared to those who did not receive treatment. SPINRAZA demonstrated a favorable safety profile
in the study.

In December 2016 SPINRAZA was approved by the FDA for the treatment of SMA in pediatric and adult
patients in the U.S. The FDA also issued us a rare pediatric disease priority review voucher with the approval
of SPINRAZA, which confers priority review to a subsequent drug application that would not otherwise qualify
for priority review.

3

Biosimilars (Samsung Bioepis - Biogen's Joint Venture with Samsung Biologics)

BENEPALI

In January 2016 the EC approved Samsung Bioepis' MAA for BENEPALI, an etanercept biosimilar referencing
ENBREL, for marketing in the E.U. Under our agreement with Samsung Bioepis, we are manufacturing and
commercializing BENEPALI in specified E.U. countries.

FLIXABI

In May 2016 the EC approved Samsung Bioepis' MAA for FLIXABI, an infliximab biosimilar candidate
referencing REMICADE, for marketing in the E.U. Under our agreement with Samsung Bioepis, we are
manufacturing and commercializing FLIXABI in specified E.U. countries.

Adalimumab (SB5)

In July 2016 the EMA accepted Samsung Bioepis' MAA for SB5, an adalimumab biosimilar candidate
referencing HUMIRA.

GAZYVA (obinutuzumab)

Genentech Relationships

In February 2016 the Roche Group announced that the FDA approved GAZYVA plus bendamustine
chemotherapy followed by GAZYVA alone as a new treatment for people with follicular lymphoma who did not
respond to a RITUXAN-containing regiment, or whose follicular lymphoma returned after such treatment.

In May 2016 the Roche Group announced positive results from the Phase 3 GALLIUM study, which
investigated the efficacy and safety of GAZYVA in combination with chemotherapy followed by maintenance
with GAZYVA alone, compared to RITUXAN in combination with chemotherapy followed by maintenance with
RITUXAN alone in previously untreated patients with follicular lymphoma. Results from pre-planned interim
analysis showed that GAZYVA-based treatment significantly reduced the risk of disease worsening or death
compared to RITUXAN-based treatment.

In July 2016 the Roche Group announced that the Phase 3 GOYA study evaluating GAZYVA plus CHOP
chemotherapy in people with previously untreated diffuse large B-cell lymphoma did not meet its primary
endpoint of significantly reducing the risk of disease worsening or death compared to RITUXAN plus CHOP
chemotherapy. Adverse events with GAZYVA and RITUXAN were consistent with those seen in previous clinical
trials when each was combined with various chemotherapies.

OCREVUS (ocrelizumab)

In June 2016 the Roche Group announced that the EMA validated its MAA of OCREVUS for the treatment of
relapsing multiple sclerosis (RMS) and primary progressive multiple sclerosis (PPMS) in the E.U. The FDA has
also accepted for review the Roche Group's Biologics License Application (BLA) for OCREVUS for the
treatment of RMS and PPMS.

RITUXAN (rituximab)

In November 2016 Genentech announced the FDA accepted its BLA for a subcutaneous formulation of
RITUXAN.

During 2016 we discontinued development of amiselimod (MT-1303) under our agreement with Mitsubishi 
Tanabe Pharma Corporation, and IONIS-DMPKRx under one of our collaboration agreements with Ionis.
Additionally, we terminated our collaboration agreements with Rodin Therapeutics, Inc. and Ataxion Inc.

Discontinued Programs

4

Marketed Products

The following graphs show our revenues by product and revenues from anti-CD20 therapeutic programs and

geography as a percentage of revenue for the years ended December 31, 2016, 2015 and 2014.

i

f

d PLEGRIDY
(1) Interferon includes AVONEX and PLEGRIDY
(1) I t
(2) Other includes ZINBRYTA, FAMPYRA, ELOCTATE, ALPROLIX, 
FUMADERM, SPINRAZA, BENEPALI and FLIXABI

AVONEX

l d

Product sales for TECFIDERA, AVONEX and TYSABRI and anti-CD20 therapeutic programs for RITUXAN each

accounted for more than 10% of our total revenue for the years ended December 31, 2016, 2015 and 2014. For 
additional financial information about our product and other revenues and geographic areas in which we operate,
please read Note 24, Segment Information to our consolidated financial statements, Item 6. Selected Financial Data
and Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations included in this 
report. A discussion of the risks attendant to our operations is set forth in the “Risk Factors” section of this report.

5

Multiple Sclerosis

We develop, manufacture and market a number of products designed to treat patients with MS. MS is a 
progressive neurological disease in which the body loses the ability to transmit messages along nerve cells, leading
to a loss of muscle control, paralysis and, in some cases, death. Patients with active relapsing MS experience an
uneven pattern of disease progression characterized by periods of stability that are interrupted by flare-ups of the 
disease after which the patient returns to a new baseline of functioning.

Our MS products and major markets include:

Product

Indication

Collaborator

Major Markets

Relapsing forms of MS in the U.S.

Relapsing-remitting MS (RRMS) in 
the E.U.

None

Relapsing forms of MS

None

Relapsing forms of MS in the U.S.

RRMS in the E.U.

Relapsing forms of MS

Crohn's disease in the U.S.

None

None

Relapsing forms of MS

AbbVie Inc. (AbbVie)

U.S.
France
Germany
Italy
Spain
United Kingdom

U.S.
France
Germany
Italy
Spain
United Kingdom

U.S.
France
Germany
Italy
Spain
United Kingdom

U.S.
France
Germany
Italy
Spain
United Kingdom

U.S.
Germany

Walking ability for patients with MS

Acorda Therapeutics, Inc.
(Acorda)

France
Germany
Spain

Spinal Muscular Atrophy

SMA is characterized by loss of motor neurons in the spinal cord and lower brain stem, resulting in severe and 

progressive muscular atrophy and weakness. Ultimately, individuals with the most severe type of SMA can become 
paralyzed and have difficulty performing the basic functions of life, like breathing and swallowing. Due to a loss of, or 
defect in the SMN1 gene, people with SMA do not produce enough survival motor neuron (SMN) protein, which is 
critical for the maintenance of motor neurons. The severity of SMA correlates with the amount of SMN protein.
People with Type 1 SMA, the most severe life-threatening form, produce very little SMN protein and do not achieve 
the ability to sit without support or live beyond two years without respiratory support. People with Type 2 and Type 3
produce greater amounts of SMN protein and have less severe, but still life-altering, forms of SMA.

In December 2016 the FDA approved SPINRAZA for the treatment of SMA in pediatric and adult patients. We 

are currently in the early stages of commercial launch in the U.S.

6

Our products for SMA and major markets include: 

Product

Indication

Collaborator

Major Markets

Spinal muscular atrophy

Ionis

U.S.

Other

Product

Biosimilars

Indication

Collaborator

Major Markets

Moderate to severe plaque
psoriasis

None

Germany

Biosimilars are a group of biologic medicines that are similar to currently available biologic therapies known as
originators. Under our agreement with Samsung Bioepis, we manufacture and commercialize two anti-TNF biosimilars
in certain countries in the E.U.: BENEPALI, an etanercept biosimilar referencing ENBREL and FLIXABI, an infliximab 
biosimilar referencing REMICADE:

Product

Indication

Moderate to severe rheumatoid arthritis
Progressive psoriatic arthritis
Axial spondyloarthritis
Moderate to severe plaque psoriasis

Rheumatoid arthritis
Moderate to severe Crohn's disease
Severe ulcerative colitis
Severe ankylosing spondylitis
Psoriatic arthritis
Moderate to severe plaque psoriasis

Major Markets

Denmark
Germany
Netherlands
Norway
United Kingdom

Germany
Netherlands
United Kingdom

Genentech Relationships

We have a collaboration agreement with Genentech that entitles us to certain business and financial rights 

with respect to RITUXAN, GAZYVA and other anti-CD20 product candidates. Current products include:

Product

Indication

Non-Hodgkin's lymphoma
CLL
Rheumatoid arthritis
Two forms of ANCA-associated vasculitis

Major Markets

U.S.
Canada

In combination with chlorambucil for previously untreated CLL
Follicular lymphoma

U.S.

For information about our anti-CD20 therapeutic programs and related agreements with Genentech, please 

read Note 1, Summary of Significant Accounting Policies and Note 19, Collaborative and Other Relationships to our 
consolidated financial statements included in this report.

7

Patient Support and Access

Marketing and Distribution

We interact with patients, advocacy 

Sales Force and Marketing

organizations and healthcare societies in order to gain 
insights into unmet needs. The insights gained from
these engagements help us support patients with
services, programs and applications that are designed
to help patients lead better lives. Among other things,
we provide customer service and other related
programs for our products, such as disease and
product specific websites, insurance research
services, financial assistance programs, and the
facilitation of the procurement of our marketed
products. 

We are dedicated to helping patients obtain 

access to our therapies. Our patient representatives
have access to a comprehensive suite of financial 
assistance tools. With those tools, we help patients 
understand their insurance coverage and, if needed,
help patients compare and select new insurance 
options and programs. In the U.S., we have 
established programs that provide co-pay assistance
or free marketed product for qualified uninsured or 
underinsured patients, based on specific eligibility 
criteria. We also provide charitable contributions to
independent charitable organizations that assist 
patients with out-of-pocket expenses associated with
their therapy.

We promote our products worldwide, including in
the U.S., most of the major countries of the E.U. and 
Japan, primarily through our own sales forces and
marketing groups. In some countries, particularly in 
areas where we continue to expand into new
geographic areas, we partner with third parties. We
co-promote ZINBRYTA with AbbVie in the U.S., E.U.
and Canadian territories.

We focus our sales and marketing efforts on 
specialist physicians in private practice or at major 
medical centers. We use customary pharmaceutical
company practices to market our products and to
educate physicians, such as sales representatives
calling on individual physicians, advertisements,
professional symposia, direct mail, public relations
and other methods.

Distribution Arrangements

We distribute our products in the U.S. principally 

through wholesale distributors of pharmaceutical
products, mail order specialty distributors or shipping
service providers. In other countries, the distribution
of our products varies from country to country,
including through wholesale distributors of 
pharmaceutical products and third-party distribution
partners who are responsible for most marketing and
distribution activities.

AbbVie distributes ZINBRYTA in the U.S., and we

distribute ZINBRYTA in ex-U.S. markets.

RITUXAN and GAZYVA are marketed and
distributed by the Roche Group and its sublicensees.

Our product sales to two wholesale distributors,
AmerisourceBergen and McKesson, each accounted 
for more than 10% of our total revenues for the years
ended December 31, 2016, 2015 and 2014, and on
a combined basis, accounted for approximately 60%
of our gross product revenues for such years,
respectively. For additional information, please read
Note 1, Summary of Significant Accounting Policies to
our consolidated financial statements included in this
report.

8

Patents and Other Proprietary Rights

Patents are important to obtaining and 

protecting exclusive rights in our products and product 
candidates. We regularly seek patent protection in the 
U.S. and in selected countries outside the U.S. for 
inventions originating from our research and 
development efforts. In addition, we license rights to
various patents and patent applications. 

U.S. patents, as well as most foreign patents,

are generally effective for 20 years from the date the
earliest application was filed; however, U.S. patents
that issue on applications filed before June 8, 
1995 may be effective until 17 years from the issue 
date, if that is later than the 20 year date. In some
cases, the patent term may be extended to recapture 
a portion of the term lost during regulatory review of 
the claimed therapeutic or, in the case of the U.S., 
because of U.S. Patent and Trademark Office (USPTO) 
delays in prosecuting the application. Specifically, in 
the U.S., under the Drug Price Competition and Patent 
Term Restoration Act of 1984, commonly known as
the Hatch-Waxman Act, a patent that covers an FDA-
approved drug may be eligible for patent term 
extension (for up to five years, but not beyond a total 
of 14 years from the date of product approval) as 
compensation for patent term lost during the FDA
regulatory review process. The duration and extension 
of the term of foreign patents varies, in accordance 
with local law. For example, supplementary protection 
certificates (SPCs) on some of our products have 
been granted in a number of European countries,
compensating in part for delays in obtaining 
marketing approval.

Regulatory exclusivity, which may consist of 
regulatory data protection and market protection, also 
can provide meaningful protection for our products. 
Regulatory data protection provides to the holder of a 
drug or biologic marketing authorization, for a set
period of time, the exclusive use of the proprietary 
pre-clinical and clinical data that it created at 
significant cost and submitted to the applicable 
regulatory authority to obtain approval of its product. 
After the applicable set period of time, third parties
are then permitted to rely upon our data to file for 
approval of their abbreviated applications for, and to 
market (subject to any applicable market protection), 
their generic drugs and biosimilars referencing our 
data. Market protection provides to the holder of a 
drug or biologic marketing authorization the exclusive 
right to commercialize its product for a set period of 

time, thereby preventing the commercialization of 
another product containing the same active  
ingredient(s) during that period. Although the World 
Trade Organization's agreement on trade-related 
aspects of intellectual property rights (TRIPS) requires 
signatory countries to provide regulatory exclusivity to
innovative pharmaceutical products, implementation 
and enforcement varies widely from country to 
country.

We also rely upon other forms of unpatented 
confidential information to remain competitive. We
protect such information principally through 
confidentiality agreements with our employees, 
consultants, outside scientific collaborators, 
scientists whose research we sponsor and other 
advisers. In the case of our employees, these 
agreements also provide, in compliance with relevant 
law, that inventions and other intellectual property 
conceived by such employees during their employment
shall be our exclusive property.

Our trademarks are important to us and are

generally covered by trademark applications or 
registrations in the USPTO and the patent or 
trademark offices of other countries. We also use 
trademarks licensed from third parties, such as the
trademark FAMPYRA which we license from Acorda. 
Trademark protection varies in accordance with local 
law, and continues in some countries as long as the 
trademark is used and in other countries as long as 
the trademark is registered. Trademark registrations 
generally are for fixed but renewable terms.

Our Patent Portfolio

The following table describes our patents in the 
U.S. and Europe that we currently consider of primary 
importance to our marketed products, including the 
territory, patent number, general subject matter and 
expected expiration dates. Except as otherwise noted,
the expected expiration dates include any granted
patent term extensions and issued SPCs. In some 
instances, there are later-expiring patents relating to
our products directed to, among other things, 
particular forms or compositions, methods of 
manufacturing, or use of the drug in the treatment of 
particular diseases or conditions. We also continue to 
pursue additional patents and patent term extensions 
in the U.S. and other territories covering various
aspects of our products that may, if issued, extend 
exclusivity beyond the expiration of the patents listed 
in the table.

9

Product
TECFIDERA

AVONEX and
PLEGRIDY
PLEGRIDY

TYSABRI

FAMPYRA

ZINBRYTA

SPINRAZA

Territory
U.S.
U.S.
U.S.
U.S.
U.S.

U.S.
U.S.
Europe

Europe
U.S.

U.S.
U.S.
U.S.
Europe

Europe

U.S.

U.S.

U.S.
U.S.
Europe

Europe
Europe

Europe

U.S.
U.S.
U.S.
Europe

U.S.
U.S.

U.S.
U.S.

U.S.

U.S.

U.S.

Europe

Europe

Footnotes follow on next page.

Patent No.
7,619,001
7,803,840
8,399,514
8,524,773
6,509,376

8,759,393
7,320,999
1131065

2137537
7,588,755

7,446,173
8,524,660
8,017,733
1656952

1476181

5,840,299

6,602,503

7,807,167
9,493,567
0804237

1485127
1732548

23775536

8,454,965
7,258,859
9,340,619
1539200

6,166,197
6,210,892

7,101,993
7,838,657

8,110,560

8,361,977

8,980,853

1910395

2548560

General Subject Matter
Methods of treatment
Methods of treatment
Methods of treatment
Methods of treatment
Formulations of dialkyl fumarates for use in the
treatment of autoimmune diseases
Formulations
Methods of treatment
Formulations of dialkyl fumarates and their use for
treating autoimmune diseases
Methods of use
Use of recombinant beta interferon for
immunomodulation
Polymer conjugates of interferon beta-1a
Methods of treatment
Polymer conjugates of interferon beta-1a
Polymer conjugates of interferon-beta-1a and uses
thereof
Polymer conjugates of interferon-beta-1a and uses
thereof
Humanized immunoglobulins; nucleic acids;
pharmaceutical compositions; methods of use
Humanized recombinant antibodies; nucleic acids and
host cells; processes for production; therapeutic
compositions; methods of use
Methods of treatment
Methods of treatment
Humanized immunoglobulins; nucleic acids;
pharmaceutical compositions; medical uses
Methods of use
Sustained-release aminopyridine compositions for
increasing walking speed in patients with MS
Sustained-release aminopyridine compositions for
treating MS
Methods of treatment
Methods of treatment
Daclizumab HYP compositions
Anti-IL-2-receptor antibody for use in a method of
treating a subject with MS
Oligomeric Compounds Having Pyrimidine Nucleotide(s)
Alteration of Cellular Behavior By Antisense Modulation
of MRNA Processing
Oligonucleotides Containing 2’-O-Modified Purines
SMA Treatment Via Targeting of SMN2 Splice Site
Inhibitory Sequences
SMA Treatment Via Targeting of SMN2 Splice Site
Inhibitory Sequences
Compositions And Methods For Modulation of SMN2
Splicing
Compositions And Methods For Modulation of SMN2
Splicing
Compositions And Methods For Modulation of SMN2
Splicing
Compositions And Methods For Modulation of SMN2
Splicing

10

Patent
Expiration(1)
2018
2018
2028
2018
2019

2019
2020
2019(2)

2028(3)
2026

2022
2023
2025
2019

2023

2017

2020

2023
2027
2020(4)

2023
2025(5)

2025(6)

2024
2024
2032
2023

2017
2018

2023
2027

2025

2030

2030

2026

2026

(1)  In addition to patent protection, certain of our products are entitled to regulatory exclusivity in the U.S. and the E.U. expected 

until the dates set forth below:

Territory

TYSABRI

PLEGRIDY

Product
TECFIDERA U.S.
E.U.
U.S.
E.U.
U.S.
E.U.
E.U.
U.S.
E.U.
U.S.

FAMPYRA
ZINBRYTA

SPINRAZA

Expected Expiration
2018
2024
2026
2024
2016
2016
2021
2028
*
2023

*ZINBRYTA was not designated a new active substance at the time of its approval in the E.U. and is not automatically entitled to regulatory 
exclusivity. Regulatory exclusivity may, however, be available for independent development of known active substances. We intend to assert
the protection of its data on this basis.

(2)  This patent is subject to granted SPCs in certain European countries, which extended the patent term in those countries 

to 2024.

(3)  This patent was revoked in a European opposition. This decision is being appealed. The patent is subject to granted

SPCs in certain European countries, which extended the patent term in those countries to 2029.

(4)  Reflects SPCs granted in most European countries.

(5)  This patent is subject to granted SPCs in certain European countries, which extended the patent term in those countries 

to 2026.

(6)  This patent is subject to granted SPCs in certain European countries, which extended the patent term in those countries 

to 2026.

The existence of patents does not guarantee our right to practice the patented technology or commercialize the 

patented product. Patents relating to pharmaceutical, biopharmaceutical and biotechnology products, compounds
and processes, such as those that cover our existing compounds, products and processes and those that we will
likely file in the future, do not always provide complete or adequate protection. 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 patents, regulatory exclusivities or other 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 patents, 
regulatory exclusivities and other proprietary rights covering our products by manufacturers of generics and 
biosimilars. A discussion of certain risks and uncertainties that may affect our patent position, regulatory 
exclusivities and other proprietary rights is set forth in the “Risk Factors” section of this report, and a discussion of 
legal proceedings related to certain patents described above is set forth in Note 20, Litigation to our consolidated 
financial statements included in this report.

”

11

Additional information about the competition that 

our marketed products face is set forth below.

Multiple Sclerosis

TECFIDERA, AVONEX, PLEGRIDY, TYSABRI and

ZINBRYTA each compete with one or more of the
following products: 

Competing Product
AUBAGIO (teriflunomide)
BETASERON/BETAFERON
(interferon-beta-1b)
COPAXONE
(glatiramer acetate)
EXTAVIA
(interferon-beta-1b)
GLATOPA (glatiramer
acetate)
GILENYA (fingolimod)
LEMTRADA
(alemtuzumab)
REBIF 
(interferon-beta-1)

Competitor
Sanofi
Bayer Group

Teva Pharmaceuticals
Industries Ltd.
Novartis AG

Sandoz, a division of
Novartis AG
Novartis AG
Sanofi

Merck KGaA (and co-
promoted with Pfizer Inc.
in the U.S.)

FAMPYRA is indicated as a treatment to improve

walking in adult patients with MS who have walking
disability and is the first treatment that addresses
this unmet medical need with demonstrated efficacy 
in people with all types of MS. FAMPYRA is currently 
the only therapy approved to improve walking in
patients with MS.

Competition in the MS market is intense. Along

with us, a number of companies are working to 
develop additional treatments for MS that may in the 
future compete with our MS products. One such
product candidate is OCREVUS, a potential treatment
for RMS and PPMS being developed by Genentech.
While we have a financial interest in OCREVUS, future 
sales of our MS products may be adversely affected
by the commercialization of OCREVUS, as well as by 
other MS products we or our competitors are 
developing. Future sales may also be negatively 
impacted by the introduction of generics, prodrugs of 
existing therapeutics or biosimilars of existing
products.

Competition

Competition in the biopharmaceutical industry is 

intense and comes from many sources, including 
specialized biotechnology firms and large 
pharmaceutical companies. Many of our competitors 
are working to develop products similar to those we
are developing or already market and have 
considerable experience in undertaking clinical trials 
and in obtaining regulatory approval to market 
pharmaceutical products. Certain of these companies 
have substantially greater financial, marketing and 
research and development resources than we do.

We believe that competition and leadership in 

the industry is based on managerial and technological
excellence and innovation as well as establishing 
patent and other proprietary positions through 
research and development. The achievement of a
leadership position also depends largely upon our 
ability to maximize the approval, acceptance and use 
of products resulting from research and the 
availability of adequate financial resources to fund 
facilities, equipment, personnel, clinical testing,
manufacturing and marketing. Another key aspect of 
remaining competitive within the industry is recruiting 
and retaining leading scientists and technicians. We 
believe that we have been successful in attracting and 
retaining skilled and experienced scientific personnel.

Competition among products approved for sale 

may be based, among other things, on patent 
position, product efficacy, safety, convenience/delivery 
devices, reliability, availability and price. In addition,
early entry of a new pharmaceutical product into the 
market may have important advantages in gaining 
product acceptance and market share. Accordingly,
the relative speed with which we can develop 
products, complete the testing and approval process 
and supply commercial quantities of products will 
have a significant impact on our competitive position.

The introduction of new products or 
technologies, including the development of new 
processes or technologies by competitors or new 
information about existing products or technologies, 
may result in increased competition for our marketed 
products or pricing pressure on our marketed 
products. It is also possible that the development of 
new or improved treatment options or standards of 
care or cures for the diseases our products treat 
could reduce or eliminate the use of our products or 
may limit the utility and application of ongoing clinical
trials for our product candidates. We may also face 
increased competitive pressures as a result of 
generics and the emergence of biosimilars in the U.S. 
and E.U. If a generic or biosimilar version of one of 
our products were approved, it could reduce our sales 
of that product.

12

Spinal Muscular Atrophy

Genentech Relationships in Other Indications

SPINRAZA is the only approved treatment for 

SMA. We are aware of other products in development
that, if successfully developed and approved, may 
compete with SPINRAZA in the SMA market.

Psoriasis

FUMADERM competes with several different 
types of therapies in the psoriasis market within 
Germany, including oral systemics such as 
methotrexate and cyclosporine.

Biosimilars

BENEPALI and FLIXABI, the two biosimilars we
currently manufacture and commercialize in the E.U.
for Samsung Bioepis, compete with their applicable
reference products, ENBREL and REMICADE,
respectively, as well as other biosimilars of those 
reference products.

RITUXAN and GAZYVA in Oncology

RITUXAN and GAZYVA compete with a number of 

therapies in the oncology market, including TREANDA
(bendamustine HCL), ARZERRA (ofatumumab),
IMBRUVICA (ibrutinib) and ZYDELIG (idelalisib).

We also expect that over time GAZYVA will
increasingly compete with RITUXAN in the oncology 
market. In addition, we are aware of other anti-CD20 
molecules, including biosimilars, in development that, 
if successfully developed and approved, may compete
with RITUXAN and GAZYVA in the oncology market.

RITUXAN in Rheumatoid Arthritis

RITUXAN competes with several different types

of therapies in the rheumatoid arthritis market,
including, among others, traditional disease-modifying
anti-rheumatic drugs such as steroids, methotrexate
and cyclosporine, TNF inhibitors, ORENCIA
(abatacept), ACTEMRA (tocilizumab) and XELJANZ
(tofacitinib).

We are also aware of other products, including

biosimilars, in development that, if successfully 
developed and approved, may compete with RITUXAN
in the rheumatoid arthritis market.

13

Research and Development Programs

A commitment to research is fundamental to our 

mission. Our research efforts are focused on better 
understanding the underlying biology of diseases so 
we can discover and deliver treatments that have the 
potential to make a real difference in the lives of 
patients with high unmet medical needs. By applying 
our expertise in biologics and our growing capabilities 
in small molecule, antisense, gene therapy, gene 
editing and other technologies, we target specific 
medical needs where we believe new or better 
treatments are needed.

We intend to continue committing significant
resources to research and development opportunities. 
As part of our ongoing research and development
efforts, we have devoted significant resources to 
conducting clinical studies to advance the
development of new pharmaceutical products and
technologies and to explore the utility of our existing 
products in treating disorders beyond those currently 
approved in their labels.

The table below highlights our current research
and development programs that are in clinical trials
and the current phase of such programs. Drug
development involves a high degree of risk and
investment, and the status, timing and scope of our 
development programs are subject to change.
Important factors that could adversely affect our drug
development efforts are discussed in the “Risk 
Factors” section of this report.

Product Candidate

Collaborator

PHASE 1

PHASE 2

PHASE 3

FILED

OCREVUS

Genentech (Roche Group)

Primary Progressive & Relapsing Multiple Sclerosis

Biosimilar adalimumab

Samsung Bioepis

Multiple Immunology Indications in Europe

GAZYVA

Genentech (Roche Group)

Front-Line Indolent Non Hodgkin’s Lymphoma

Aducanumab

Neurimmune SubOne AG

Alzheimer's Disease

E2609

BIIB074

BIIB074

BIIB074

BAN2401

Eisai Co., Ltd. (Eisai)

Alzheimer's Disease

None

None

None

Eisai

Trigeminal Neuralgia

Lumbosacral Radiculopathy

Erythromelalgia

Alzheimer's Disease

Opicinumab (anti-LINGO-1) None

Multiple Sclerosis

TYSABRI

rAAV-XLRS

BG00011 (STX-100)

None

AGTC

None

Dapirolizumab pegol

UCB Pharma

BIIB059 (Anti-BDCA02)

None

BIIB061

BIIB054

None

None

BIIB067 (IONIS-SOD1Rx) 

Ionis

BIIB068 (BTK Inhibitor)

None

* Parkinson's Disease
** Amyotrophic Lateral Sclerosis
*** Autoimmune

Acute Ischemic Stroke

X-linked Juvenile Retinoschisis

Idiopathic Pulmonary Fibrosis

Lupus

Lupus

MS

PD*

ALS**

A***

For information about certain of our agreements with collaborators and other third parties, please read the 

subsection entitled “Business Relationships” below and Note 19, Collaborative and Other Relationships to our 
consolidated financial statements included in this report.

14

Late Stage Product Candidates

Additional information about our late stage product candidates, which includes programs in Phase 3 

development or in registration stage, is set forth below. 

Aducanumab (BIIB037)

Neurodegeneration

In September 2015 we enrolled our first patient in our two global Phase 3 studies, ENGAGE and EMERGE.
ENGAGE and EMERGE will assess the efficacy and safety of aducanumab, our investigational treatment for
early Alzheimer's disease, in approximately 2,700 people with early Alzheimer's disease. The studies are
identical in design and eligibility criteria. Each study will be conducted in more than 20 countries in North
America, Europe and Asia. In October 2015 we announced that we received FDA agreement on a special
protocol assessment on the Phase 3 study protocols.

In June 2016 we announced that aducanumab was accepted into the European Medicines Agency's (EMA's)
Priority Medicines (PRIME) program. PRIME aims to bring treatments to patients more quickly by enhancing
the EMA's support for the development of investigational medicines for diseases without available treatments
or in need of better treatment options.

In September 2016 aducanumab was granted Fast Track designation by the FDA. The FDA’s Fast Track
program supports the development of new treatments for serious conditions with an unmet medical need
such as Alzheimer’s disease. We also announced that in a recently completed interim analysis from our
Phase 1b study of aducanumab in early Alzheimer's disease efficacy and safety data were consistent with
results previously reported.

In December 2016 we presented new data from the Phase 1b study of aducanumab, which included interim
results from the titration cohort of the placebo-controlled period of the Phase 1b study as well as data from
the first year of the long-term extension. The results supported the ongoing Phase 3 studies of aducanumab
for early Alzheimer’s disease.

E2609

In October 2016 Eisai announced enrollment has commenced in MISSION AD, a Phase 3 clinical program of
the beta secretase cleaving enzyme (BACE) inhibitor E2609 in patients with early Alzheimer's disease in the
U.S.

Biosimilars (Samsung Bioepis - Biogen's Joint Venture with Samsung Biologics)

Adalimumab (SB5)

In July 2016 the EMA accepted Samsung Bioepis' MAA for SB5, an adalimumab biosimilar candidate
referencing HUMIRA. If approved by the EC, we will manufacture and commercialize SB5 in specified E.U.
countries.

GAZYVA (obinutuzumab)

Genentech Relationships

The Roche Group is managing GALLIUM, a Phase 3 study examining the efficacy and safety of GAZYVA plus
chemotherapy followed by GAZYVA alone for up to two years, as compared head-to-head against RITUXAN plus
chemotherapy followed by RITUXAN alone for up to two years. At a pre-planned interim analysis in May 2016,
an independent data monitoring committee determined that the study met its primary endpoint early. The
results showed GAZYVA-based treatment significantly reduced the risk of disease worsening or death
(progression-free survival) compared to RITUXAN-based treatment.

OCREVUS (ocrelizumab)

In June 2015 the Roche Group announced positive results from two Phase 3 studies evaluating OCREVUS
compared with interferon beta-1a in people with relapsing forms of MS. Treatment with OCREVUS compared
with interferon beta-1a significantly reduced the annualized relapse rate over a two-year period; significantly
reduced the progression of clinical disability; and led to a significant reduction in the number of lesions in the
brain as measured by MRI.

In September 2015 the Roche Group announced positive results from a Phase 3 study evaluating OCREVUS
in people with PPMS. Treatment with OCREVUS significantly reduced the progression of clinical disability
compared with placebo, as measured by the Expanded Disability Status Scale.

In June 2016 the Roche Group announced that the EMA validated its MAA of OCREVUS for the treatment of
RMS and PPMS in the E.U. The FDA has also accepted for review its BLA for OCREVUS for the treatment of
RMS and PPMS, and has granted the application priority review designation. Under our agreement with
Genentech, if OCREVUS is approved, we will receive tiered royalty payments on sales of OCREVUS in the U.S.

15

Business Relationships

Eisai Co., Ltd.

We have a collaboration with Eisai to jointly 
develop and commercialize E2609 and BAN2401, two
Eisai product candidates for the treatment of 
Alzheimer’s disease. Eisai serves as the global
operational and regulatory lead for E2609 and 
BAN2401 and all costs, including research, 
development, sales and marketing expenses, are 
shared equally between us and Eisai. Following 
marketing approval in major markets, we will co-
promote E2609 and BAN2401 with Eisai and share
profits equally. In smaller markets, Eisai will distribute 
these products and pay us a royalty.

The agreement also provides Eisai with options 

to jointly develop and commercialize two of our 
candidates for Alzheimer’s disease, aducanumab and
an anti-tau monoclonal antibody, upon the exchange 
or provision of clinical data. Upon exercise of the 
applicable option, we will execute a separate 
collaboration agreement with Eisai on terms and 
conditions that mirror the financial arrangements we
have with Eisai with respect to E2609 and BAN2401.

Genentech (Roche Group)

We have a collaboration agreement with 
Genentech which entitles us to certain financial and 
other rights with respect to RITUXAN, GAZYVA and 
other anti-CD20 product candidates. Additionally, 
under our agreement with Genentech, if OCREVUS is 
approved, we will receive tiered royalty payments on 
sales of OCREVUS in the U.S.

Ionis Pharmaceuticals, Inc.

We have an exclusive, worldwide option and 
collaboration agreement with Ionis relating to the 
development and commercialization of up to three 
gene targets, and an exclusive worldwide option and
collaboration agreement with Ionis under which both
companies are developing and commercializing
SPINRAZA for the treatment of SMA.

We also have a six-year research collaboration 
agreement with Ionis, under which both companies 
perform discovery level research and will develop and 
commercialize antisense and other therapeutics for 
the treatment of neurological disorders.

As part of our business strategy, we establish

business relationships, including joint ventures and 
collaborative arrangements with other companies, 
universities and medical research institutions, to
assist in the clinical development and/or 
commercialization of certain of our products and 
product candidates and to provide support for our 
research programs. We also evaluate opportunities for 
acquiring products or rights to products and 
technologies that are complementary to our business 
from other companies, universities and medical
research institutions.

Below is a brief description of certain business 

relationships and collaborations that expand our 
pipeline and provide us with certain rights to existing
and potential new products and technologies. For 
more information regarding certain of these
relationships, including their ongoing financial and 
accounting impact on our business, please read Note 
19, Collaborative and Other Relationships to our 
consolidated financial statements included in this 
report.

AbbVie, Inc.

We have a collaboration agreement with AbbVie 

aimed at advancing the development and
commercialization of ZINBRYTA in MS. Under the 
agreement, we and AbbVie conduct ZINBRYTA co-
promotion activities in the U.S., E.U. and Canadian 
territories, and we are responsible for manufacturing
and research and development activities.

Acorda Therapeutics, Inc.

We collaborate with Acorda to develop and
commercialize products containing fampridine, such 
as FAMPYRA, in markets outside the U.S. We also
have responsibility for regulatory activities and the
future clinical development of related products in 
those markets.

Applied Genetic Technologies Corporation

We have a collaboration agreement with Applied 

Genetic Technologies Corporation (AGTC) to develop
gene-based therapies for multiple ophthalmic 
diseases. The collaboration focuses on the 
development of a clinical-stage candidate for X-linked
Retinoschisis (XLRS) and a preclinical candidate for 
the treatment of X-linked Retinitis Pigmentosa (XLRP),
for which we were granted worldwide
commercialization rights. The agreement also
provides us with options to early stage discovery 
programs in two ophthalmic diseases and one non-
ophthalmic condition.

16

Samsung Bioepis

Regulatory

We and Samsung Biologics established a joint
venture, Samsung Bioepis, to develop, manufacture
and market biosimilar pharmaceuticals. We also have 
an agreement with Samsung Bioepis to
commercialize, over a 10-year term, three anti-TNF 
biosimilar product candidates in specified E.U.
countries and, in the case of BENEPALI, Japan. Under 
this agreement, we are manufacturing and
commercializing BENEPALI, an etanercept biosimilar 
referencing ENBREL and FLIXABI, an infliximab
biosimilar referencing REMICADE. 

In addition to our joint venture and

commercialization agreement with Samsung Bioepis, 
we license certain of our proprietary technology to
Samsung Bioepis in connection with Samsung
Bioepis' development, manufacture and
commercialization of its biosimilar products. We also
provide technical development and technology 
transfer services to Samsung Bioepis, and 
manufacture clinical and commercial quantities of 
bulk drug substance of Samsung Bioepis' biosimilar 
products.

University of Pennsylvania

We have a collaboration and alliance with the

University of Pennsylvania to advance gene therapy 
and gene editing technologies. The collaboration will
primarily focus on the development of therapeutic
approaches that target the eye, skeletal muscle and
the central nervous system. The alliance is also 
expected to focus on the research and validation of 
next-generation gene transfer technology using adeno-
associated virus gene delivery vectors and exploring
the expanded use of genome editing technology as a 
potential therapeutic platform.

Our current and contemplated activities and the

products, technologies and processes that result from
such activities are subject to substantial government 
regulation.

Regulation of Pharmaceuticals

Product Approval and Post-Approval Regulation in 

the U.S.

APPROVAL PROCESS

Before new pharmaceutical products may be
sold in the U.S., preclinical studies and clinical trials
of the products must be conducted and the results
submitted to the FDA for approval. With limited
exceptions, the FDA requires companies to register 
both pre-approval and post-approval clinical trials and
disclose clinical trial results in public databases.
Failure to register a trial or disclose study results
within the required time periods could result in
penalties, including civil monetary penalties. Clinical 
trial programs must establish efficacy, determine an
appropriate dose and dosing regimen, and define the
conditions for safe use. This is a high-risk process
that requires stepwise clinical studies in which the
candidate product must successfully meet
predetermined endpoints. The results of the
preclinical and clinical testing of a product are then
submitted to the FDA in the form of a BLA or a NDA.
In response to a BLA or NDA, the FDA may grant 
marketing approval, request additional information or 
deny the application if it determines the application
does not provide an adequate basis for approval.

Product development and receipt of regulatory 

approval takes a number of years, involves the
expenditure of substantial resources and depends on
a number of factors, including the severity of the 
disease in question, the availability of alternative 
treatments, potential safety signals observed in
preclinical or clinical tests, and the risks and benefits
of the product as demonstrated in clinical trials. The 
FDA has substantial discretion in the product approval
process, and it is impossible to predict with any 
certainty whether and when the FDA will grant 
marketing approval. The agency may require the
sponsor of a BLA or NDA to conduct additional clinical
studies or to provide other scientific or technical 
information about the product, and these additional
requirements may lead to unanticipated delay or 
expense. Furthermore, even if a product is approved,
the approval may be subject to limitations based on
the FDA's interpretation of the existing pre-clinical or 
clinical data. 

17

The FDA has developed four distinct approaches 

•  Breakthrough Therapy: The FDA may grant 

intended to make therapeutically important drugs
available as rapidly as possible, especially when the
drugs are the first available treatment or have 
advantages over existing treatments: accelerated
approval, fast track, breakthrough therapy and priority 
review.

•  Accelerated Approval: The FDA may grant 

“accelerated approval” status to products that
treat serious or life-threatening illnesses and 
that provide meaningful therapeutic benefits to
patients over existing treatments. Under this 
pathway, the FDA may approve a product based 
on surrogate endpoints, or clinical endpoints
other than survival or irreversible morbidity.
When approval is based on surrogate endpoints 
or clinical endpoints other than survival or 
morbidity, the sponsor will be required to conduct
additional post-approval clinical studies to verify 
and describe clinical benefit. Under the agency's 
accelerated approval regulations, if the FDA
concludes that a drug that has been shown to be 
effective can be safely used only if distribution or 
use is restricted, it may require certain post-
marketing restrictions as necessary to assure 
safe use. In addition, for products approved
under accelerated approval, sponsors may be 
required to submit all copies of their promotional 
materials, including advertisements, to the FDA 
at least thirty days prior to initial dissemination.
The FDA may withdraw approval under 
accelerated approval after a hearing if, for 
instance, post-marketing studies fail to verify any 
clinical benefit, it becomes clear that restrictions 
on the distribution of the product are inadequate 
to ensure its safe use, or if a sponsor fails to 
comply with the conditions of the accelerated
approval.

•  Fast Track Status: The FDA may grant "fast track"
status to products that treat a serious condition 
and have data demonstrating the potential to
address an unmet medical need or a drug that
has been designated as a qualified infectious 
disease product.

“breakthrough therapy” status to drugs designed
to treat, alone or in combination with another 
drug or drugs, a serious or life-threatening
disease or condition and for which preliminary 
clinical evidence suggests a substantial
improvement over existing therapies. Such drugs 
need not address an unmet need, but are
nevertheless eligible for expedited review if they 
offer the potential for an improvement.
Breakthrough therapy status entitles the sponsor 
to earlier and more frequent meetings with the 
FDA regarding the development of nonclinical
and clinical data and permits the FDA to offer 
product development or regulatory advice for the
purpose of shortening the time to product
approval. Breakthrough therapy status does not
guarantee that a product will be developed or 
reviewed more quickly and does not ensure FDA
approval.

•  Priority Review: Priority Review only applies to

applications (original or efficacy supplement) for 
a drug that treats a serious condition and, if 
approved, would provide a significant
improvement in safety or effectiveness. Priority 
Review may also be granted for any supplement
that proposes a labeling change due to studies
completed in response to a written request from 
FDA for pediatric studies, for an application for a 
drug that has been designated as a qualified
infectious disease product, or any application or 
supplement for a drug submitted with a priority 
review voucher.

POST-MARKETING STUDIES

Regardless of the approval pathway employed,
the FDA may require a sponsor to conduct additional
post-marketing studies as a condition of approval to
provide data on safety and effectiveness. If a sponsor 
fails to conduct the required studies, the agency may 
withdraw its approval. In addition, if the FDA
concludes that a drug that has been shown to be
effective can be safely used only if distribution or use
is restricted, it can mandate post-marketing
restrictions as necessary to assure safe use. In such
a case, the sponsor may be required to establish
rigorous systems to assure use of the product under 
safe conditions. These systems are usually referred 
to as Risk Evaluation and Mitigation Strategies
(REMS). The FDA can impose financial penalties for 
failing to comply with certain post-marketing
commitments, including REMS. In addition, any 
changes to an approved REMS must be reviewed and
approved by the FDA prior to implementation.

18

ADVERSE EVENT REPORTING

Regulation of Combination Products

We monitor information on side effects and

adverse events reported during clinical studies and
after marketing approval and report such information 
and events to regulatory agencies. Non-compliance 
with the FDA's safety reporting requirements may 
result in civil or criminal penalties. Side effects or 
adverse events that are reported during clinical trials 
can delay, impede, or prevent marketing approval.
Based on new safety information that emerges after 
approval, the FDA can mandate product labeling 
changes, impose a new REMS or the addition of 
elements to an existing REMS, require new post-
marketing studies (including additional clinical trials), 
or suspend or withdraw approval of the product. These 
requirements may affect our ability to maintain 
marketing approval of our products or require us to
make significant expenditures to obtain or maintain
such approvals.

APPROVAL OF CHANGES TO AN APPROVED 

PRODUCT

If we seek to make certain types of changes to
an approved product, such as adding a new indication, 
making certain manufacturing changes, or changing
manufacturers or suppliers of certain ingredients or 
components, the FDA will need to review and approve
such changes in advance. In the case of a new 
indication, we are required to demonstrate with 
additional clinical data that the product is safe and
effective for a use other than that initially approved.
FDA regulatory review may result in denial or 
modification of the planned changes, or requirements
to conduct additional tests or evaluations that can
substantially delay or increase the cost of the planned
changes.

REGULATION OF PRODUCT ADVERTISING AND 

PROMOTION

The FDA regulates all advertising and promotion
activities and communications for products under its 
jurisdiction both before and after approval. A company 
can make only those claims relating to safety and
efficacy that are approved by the FDA. However,
physicians may prescribe legally available drugs for 
uses that are not described in the drug's labeling.
Such off-label uses are common across medical
specialties, and often reflect a physician's belief that
the off-label use is the best treatment for patients. 
The FDA does not regulate the behavior of physicians 
in their choice of treatments, but FDA regulations do 
impose stringent restrictions on manufacturers' 
communications regarding off-label uses. Failure to
comply with applicable FDA requirements may subject
a company to adverse publicity, enforcement action by 
the FDA, corrective advertising, and the full range of 
civil and criminal penalties available to the 
government.

19

Combination products are defined by the FDA to

include products comprising two or more regulated 
components (e.g., a biologic and a device). Biologics
and devices each have their own regulatory 
requirements, and combination products may have
additional requirements. Some of our marketed
products meet this definition and are regulated under 
this framework and similar regulations outside the
U.S., and we expect that some of our pipeline product
candidates may be evaluated for regulatory approval
under this framework as well.

Product Approval and Post-Approval Regulation 

Outside the U.S.

We market our products in numerous
jurisdictions outside the U.S. Most of these
jurisdictions have product approval and post-approval
regulatory processes that are similar in principle to
those in the U.S. In Europe, for example, where a
substantial part of our ex-U.S. efforts are focused, 
there are several tracks for marketing approval,
depending on the type of product for which approval is
sought. Under the centralized procedure, a company 
submits a single application to the EMA. The 
marketing application is similar to the NDA or BLA in
the U.S. and is evaluated by the Committee for 
Medicinal Products for Human Use (CHMP), the expert
scientific committee of the EMA. If the CHMP
determines that the marketing application fulfills the
requirements for quality, safety, and efficacy, it will
submit a favorable opinion to the EC. The CHMP
opinion is not binding, but is typically adopted by the
EC. A marketing application approved by the EC is
valid in all member states. The centralized procedure
is required for all biological products, orphan
medicinal products, and new treatments for 
neurodegenerative disorders, and it is available for 
certain other products, including those which
constitute a significant therapeutic, scientific or 
technical innovation.

In addition to the centralized procedure, Europe

also has: 

•  a nationalized procedure, which requires a
separate application to and approval
determination by each country;

•  a decentralized procedure, whereby applicants

submit identical applications to several countries 
and receive simultaneous approval; and

•  a mutual recognition procedure, where applicants
submit an application to one country for review
and other countries may accept or reject the
initial decision.

Regardless of the approval process employed,

Approval of Biosimilars

The Patient Protection and Affordable Care Act

(PPACA) amended the Public Health Service Act
(PHSA) to authorize the FDA to approve biological
products, referred to as biosimilars or follow-on
biologics, that are shown to be highly similar to
previously approved biological products based upon
potentially abbreviated data packages. The biosimilar 
must show it has no clinically meaningful differences 
in terms of safety and effectiveness from the
reference product, and only minor differences in
clinically inactive components are allowable in
biosimilars products. The approval pathway for 
biosimilars does, however, grant a biologics
manufacturer a 12-year period of exclusivity from the 
date of approval of its biological product before
biosimilar competition can be introduced. There is
uncertainty, however, as the approval framework for 
biosimilars originally was enacted as part of the
PPACA. In 2017, there are likely to be federal 
legislative and administrative efforts to repeal,
substantially modify or invalidate some or all of the
provisions of the PPACA. If the PPACA is repealed,
substantially modified or invalidated, it is unclear 
what, if any, impact such action would have on
biosimilar regulation.

Biosimilars legislation has also been in place in 

the E.U. since 2003. In December 2012 guidelines
issued by the EMA for approving biosimilars of 
marketed monoclonal antibody products became
effective. In the E.U., biosimilars have been approved
under a specialized pathway of centralized
procedures. The pathway allows sponsors of a
biosimilar to seek and obtain regulatory approval
based in part on the clinical trial data of an innovator 
product to which the biosimilar has been
demonstrated to be “similar”. In many cases, this
allows biosimilars to be brought to market without
conducting the full complement of clinical trials 
typically required for novel biologic drugs.

various parties share responsibilities for the 
monitoring, detection, and evaluation of adverse
events post-approval, including national authorities,
the EMA, the EC, and the marketing authorization
holder. In some regions, it is possible to receive an 
“accelerated” review whereby the national regulatory 
authority will commit to truncated review timelines for 
products that meet specific medical needs.

Good Manufacturing Practices

Regulatory agencies regulate and inspect
equipment, facilities and processes used in the
manufacturing and testing of pharmaceutical and
biologic products prior to approving a product. If, after 
receiving clearance from regulatory agencies, a
company makes a material change in manufacturing
equipment, location or process, additional regulatory 
review and approval may be required. We also must
adhere to current Good Manufacturing Practices
(cGMP) and product-specific regulations enforced by 
regulatory agencies following product approval. The
FDA, the EMA and other regulatory agencies also
conduct periodic visits to re-inspect equipment, 
facilities and processes following the initial approval 
of a product. If, as a result of these inspections, it is 
determined that our equipment, facilities or processes
do not comply with applicable regulations and
conditions of product approval, regulatory agencies 
may seek civil, criminal or administrative sanctions or 
remedies against us, including significant financial 
penalties and the suspension of our manufacturing 
operations.

Good Clinical Practices

The FDA, the EMA and other regulatory agencies

promulgate regulations and standards for designing,
conducting, monitoring, auditing and reporting the
results of clinical trials to ensure that the data and 
results are accurate and that the rights and welfare of 
trial participants are adequately protected (commonly 
referred to as current Good Clinical Practices (cGCP)). 
Regulatory agencies enforce cGCP through periodic 
inspections of trial sponsors, principal investigators 
and trial sites, contract research organizations 
(CROs), and institutional review boards. If our studies 
fail to comply with applicable cGCP the clinical data
generated in our clinical trials may be deemed
unreliable and relevant regulatory agencies may 
require us to perform additional clinical trials before 
approving our marketing applications. Noncompliance
can also result in civil or criminal sanctions. We rely 
on third parties, including CROs, to carry out many of 
our clinical trial-related activities. Failure of such third 
parties to comply with cGCP can likewise result in 
rejection of our clinical trial data or other sanctions.

PP

20

Orphan Drug Act

Within the U.S.

Under the U.S. Orphan Drug Act, the FDA may 
grant orphan drug designation to drugs or biologics
intended to treat a “rare disease or condition,” which
generally is a disease or condition that affects fewer 
than 200,000 individuals in the U.S. If a product 
which has an orphan drug designation subsequently 
receives the first FDA approval for the indication for 
which it has such designation, the product is entitled
to orphan exclusivity, i.e., the FDA may not approve 
any other applications to market the same drug for 
the same indication for a period of seven years
following marketing approval, except in certain very 
limited circumstances, such as if the later product is 
shown to be clinically superior to the orphan product.
Legislation similar to the U.S. Orphan Drug Act has 
been enacted in other countries to encourage the 
research, development and marketing of medicines to
treat, prevent or diagnose rare diseases. In the E.U.,
medicinal products intended for diagnosis, prevention
or treatment of life-threatening or very serious 
diseases affecting less than five in 10,000 people 
receive 10-year market exclusivity, protocol assistance 
and access to the centralized procedure for marketing
authorization. SPINRAZA has been granted orphan 
drug designation in the U.S., E.U. and Japan.

Regulation Pertaining to Pricing and 

Reimbursement

In both domestic and foreign markets, sales of 
our products depend, in part, on the availability and
amount of reimbursement by third-party payors,
including governments, private health plans and other 
organizations. Substantial uncertainty exists regarding 
the pricing reimbursement of our products, and drug
prices continue to receive significant scrutiny. 
Governments may regulate coverage, reimbursement
and pricing of our products to control cost or affect
utilization of our products. Challenges to our pricing
strategies, by either government or private 
stakeholders, could harm our business. The U.S. and
foreign governments have enacted and regularly 
consider additional reform measures that affect 
health care coverage and costs. Private health plans
may also seek to manage cost and utilization by 
implementing coverage and reimbursement
limitations. Other payors, including managed care
organizations, health insurers, pharmacy benefit
managers, government health administration 
authorities and private health insurers, seek 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.

• Medicaid: Medicaid is a joint federal and state 
program that is administered by the states for 
low income and disabled beneficiaries. Under 
the Medicaid Drug Rebate Program, we are
required to pay a rebate for each unit of product
reimbursed by the state Medicaid programs. The
amount of the rebate is established by law and
is adjusted upward if average manufacture price
(AMP) increases more than inflation (measured
by the Consumer Price Index - Urban). The rebate
amount is calculated each quarter based on our 
report of current AMP and best price for each of 
our products to the Centers for Medicare &
Medicaid Services (CMS). The requirements for 
calculating AMP and best price are complex. We
are required to report any revisions to AMP or 
best price previously reported within a certain
period, which revisions could affect our rebate
liability for prior quarters. In addition, if we fail to
provide information timely or we are found to 
have knowingly submitted false information to
the government, the statute governing the
Medicaid Drug Rebate Program provides for civil
monetary penalties.

•  Medicare: Medicare is a federal program that is
administered by the federal government that
covers individuals age 65 and over as well as
those with certain disabilities. Medicare Part B
generally covers drugs that must be 
administered by physicians or other health care
practitioners; are provided in connection with
certain durable medical equipment; or are
certain oral anti-cancer drugs and certain oral
immunosuppressive drugs. In addition, clotting 
factors for hemophilia are typically paid under 
Medicare Part B. Medicare Part B pays for such
drugs under a payment methodology based on
the average sales price (ASP) of the drugs.
Manufacturers, including us, are required to
provide ASP information to the CMS on a
quarterly basis. The manufacturer-submitted
information is used to calculate Medicare
payment rates. If a manufacturer is found to
have made a misrepresentation in the reporting
of ASP, the governing statute provides for civil
monetary penalties.

PP

•  Medicare Part D provides coverage to enrolled 

Medicare patients for self-administered drugs
(i.e., drugs that are not administered by a
physician). Medicare Part D is administered by 
private prescription drug plans approved by the
U.S. government and each drug plan establishes
its own Medicare Part D formulary for 
prescription drug coverage and pricing, which the
drug plan may modify from time-to-time. The
prescription drug plans negotiate pricing with

21

manufacturers and pharmacies, and may 
condition formulary placement on the availability 
of manufacturer discounts. In addition,
manufacturers, including us, are required to
provide to CMS a 50% discount on brand name
prescription drugs utilized by Medicare Part D 
beneficiaries when those beneficiaries reach the 
coverage gap in their drug benefits.

•  Federal Agency Discounted Pricing: Our products 

are subject to discounted pricing when
purchased by federal agencies via the Federal 
Supply Schedule (FSS). FSS participation is 
required for our products to be covered and 
reimbursed by the Veterans Administration (VA), 
Department of Defense, Coast Guard and Public
Health Service (PHS). Coverage under Medicaid,
Medicare and the PHS pharmaceutical pricing
program is also conditioned upon FSS
participation. FSS pricing is intended not to
exceed the price that we charge our most-favored
non-federal customer for a product. In addition,
prices for drugs purchased by the VA,
Department of Defense (including drugs
purchased by military personnel and dependents 
through the TriCare retail pharmacy program), 
Coast Guard and PHS are subject to a cap on 
pricing equal to 76% of the non-federal average
manufacturer price (non-FAMP). An additional
discount applies if non-FAMP increases more
than inflation (measured by the Consumer Price
Index - Urban). In addition, if we fail to provide
information timely or we are found to have
knowingly submitted false information to the 
government, the governing statute provides for 
civil monetary penalties.

•  340B Discounted Pricing: To maintain coverage

of our products under the Medicaid Drug Rebate 
Program and Medicare Part B, we are required to
extend significant discounts to certain covered
entities that purchase products under Section
340B of the PHS pharmaceutical pricing 
program. Purchasers eligible for discounts 
include hospitals that serve a disproportionate
share of financially needy patients, community 
health clinics, hemophilia treatment centers and
other entities that receive certain types of grants 
under the PHSA. For all of our products, we must 
agree to charge a price that will not exceed the
amount determined under statute (the “ceiling 
price”) when we sell outpatient drugs to these 
covered entities. In addition, we may, but are not
required to, offer these covered entities a price
lower than the 340B ceiling price. The 340B 
discount formula is based on AMP and is
generally similar to the level of rebates 
calculated under the Medicaid Drug Rebate 
Program. 

22

Outside the U.S.

Outside the U.S., the E.U. represents a major 

market. Within the E.U., our products are paid for by a
variety of payors, with governments being the primary 
source of payment. Governments may determine or 
influence reimbursement of products. Governments
may also set prices or otherwise regulate pricing.
Negotiating prices with governmental authorities can 
delay commercialization of our products. Governments
may use a variety of cost-containment measures to
control the cost of products, including price cuts,
mandatory rebates, value-based pricing, and reference
pricing (i.e., referencing prices in other countries and 
using those reference prices to set a price). 
Budgetary pressures in many E.U. countries are
continuing to cause governments to consider or 
implement various cost-containment measures, such
as price freezes, increased price cuts and rebates,
and expanded generic substitution and patient cost-
sharing. 

Regulation Pertaining to Sales and Marketing

We are subject to various federal and state laws
pertaining to health care “fraud and abuse,” including
anti-kickback laws and false claims laws. Anti-
kickback laws generally prohibit a prescription drug
manufacturer from soliciting, offering, receiving, or 
paying any remuneration to generate business,
including the purchase or prescription of a particular 
drug. Although the specific provisions of these laws
vary, their scope is generally broad and there may be
no regulations, guidance or court decisions that clarify 
how the laws apply to particular industry practices. 
There is therefore a possibility that our practices
might be challenged under the anti-kickback or similar 
laws. False claims laws prohibit anyone from
knowingly and willingly presenting, or causing to be
presented for payment to third-party payors (including
Medicare and Medicaid) claims for reimbursed drugs
or services that are false or fraudulent, claims for 
items or services not provided as claimed, or claims
for medically unnecessary items or services. Our 
activities relating to the sale and marketing of our 
products may be subject to scrutiny under these laws.
Violations of fraud and abuse laws may be punishable
by criminal or civil sanctions, including fines and civil
monetary penalties, and exclusion from federal health
care programs (including Medicare and Medicaid). In
the U.S., federal and state authorities are paying
increased attention to enforcement of these laws
within the pharmaceutical industry and private
individuals have been active in alleging violations of 
the laws and bringing suits on behalf of the
government under the federal civil False Claims Act. If 
we were subject to allegations concerning, or were
convicted of violating, these laws, our business could
be harmed.

Laws and regulations have been enacted by the 
federal government and various states to regulate the
sales and marketing practices of pharmaceutical
manufacturers. The laws and regulations generally 
limit financial interactions between manufacturers and
health care providers or require disclosure to the
government and public of such interactions. The laws
include federal “sunshine” provisions. The sunshine
provisions apply to pharmaceutical manufacturers
with products reimbursed under certain government
programs and require those manufacturers to
disclose annually to the federal government (for re-
disclosure to the public) certain payments made to
physicians and certain other healthcare practitioners
or to teaching hospitals. State laws may also require 
disclosure of pharmaceutical pricing information and
marketing expenditures. Many of these laws and
regulations contain ambiguous requirements. Given
the lack of clarity in laws and their implementation, 
our reporting actions could be subject to the penalty 
provisions of the pertinent federal and state laws and
regulations. Outside the U.S., other countries have
implemented requirements for disclosure of financial 
interactions with healthcare providers and additional
countries may consider or implement such laws.

Other Regulations

Foreign Anti-Corruption

We are subject to various federal and foreign

laws that govern our international business practices
with respect to payments to government officials. 
Those laws include the U.S. Foreign Corrupt Practices
Act (FCPA), which prohibits U.S. companies and their 
representatives from paying, offering to pay, 
promising, or authorizing the payment of anything of 
value to any foreign government official, government
staff member, political party, or political candidate for 
the purpose of obtaining or retaining business or to
otherwise obtain favorable treatment or influence a
person working in an official capacity. In many 
countries, the health care professionals we regularly 
interact with may meet the FCPA's definition of a 
foreign government official. The FCPA also requires
public companies to make and keep books and 
records that accurately and fairly reflect their 
transactions and to devise and maintain an adequate 
system of internal accounting controls.

The laws to which we are subject also include

the U.K. Bribery Act 2010 (Bribery Act) which
proscribes giving and receiving bribes in the public
and private sectors, bribing a foreign public official, 
and failing to have adequate procedures to prevent
employees and other agents from giving bribes. U.S.
companies that conduct business in the United
Kingdom generally will be subject to the Bribery Act. 
Penalties under the Bribery Act include potentially 
unlimited fines for companies and criminal sanctions 
for corporate officers under certain circumstances.

NIH Guidelines

We seek to conduct research at our U.S.
facilities in compliance with the current U.S. National
Institutes of Health Guidelines for Research Involving
Recombinant DNA Molecules (NIH Guidelines). By 
local ordinance, we are required to, among other 
things, comply with the NIH Guidelines in relation to
PP
our facilities in RTP, North Carolina and are required to
operate pursuant to certain permits.

Other Laws

Our present and future business has been and
will continue to be subject to various other laws and
regulations. Various laws, regulations and
recommendations relating to data privacy and
protection, safe working conditions, laboratory 
practices, the experimental use of animals, and the
purchase, storage, movement, import, export and use
and disposal of hazardous or potentially hazardous
substances, including radioactive compounds and
infectious disease agents, used in connection with
our research work are or may be applicable to our 
activities. Certain agreements entered into by us
involving exclusive license rights may be subject to
national or international antitrust regulatory control,
the effect of which cannot be predicted. The extent of 
government regulation, which might result from future
legislation or administrative action, cannot accurately 
be predicted.

Environmental Matters

We strive to comply in all material respects with

applicable laws and regulations concerning the
environment. While it is impossible to predict
accurately the future costs associated with 
environmental compliance and potential remediation
activities, compliance with environmental laws is not
expected to require significant capital expenditures
and has not had, and is not expected to have, a
material adverse effect on our operations or 
competitive position.

23

Genentech is responsible for all worldwide 
manufacturing activities for bulk RITUXAN and GAZYVA 
and has sourced the manufacture of certain bulk
RITUXAN and GAZYVA requirements to a third party, 
Acorda Therapeutics supplies FAMPYRA to us 
pursuant to its supply agreement with Alkermes, Inc.
and Ionis supplies the active pharmaceutical 
ingredient (API) for SPINRAZA.

Third-Party Suppliers and Manufacturers

We principally use third parties to manufacture 
the API, except as noted above for SPINRAZA, and, to
a lesser extent, the final product for our small
molecule products and product candidates, including
TECFIDERA and FUMADERM and the final drug product
for our large molecule products and product
candidates, including SPINRAZA.

We source all of our fill-finish and the majority of 
final product assembly and storage operations for our 
products, along with a substantial part of our 
packaging operations, to a concentrated group of 
third-party contract manufacturing organizations. We 
have internal label and packaging capability for clinical
and commercial products at our Hillerød facility. Raw
materials, delivery devices, such as syringes and 
auto-injectors, and other supplies required for the 
production of our products and product candidates 
are procured from various third-party suppliers and 
manufacturers in quantities adequate to meet our 
needs. Continuity of supply of such raw materials, 
devices and supplies is assured using a strategy of 
dual sourcing where possible or by a risk-based 
inventory strategy. Our third-party service providers,
suppliers and manufacturers may be subject to 
routine cGMP inspections by the FDA or comparable 
agencies in other jurisdictions and undergo 
assessment and certification by our quality 
management group.

Manufacturing

We are committed to ensuring an uninterrupted 
supply of medicines to patients around the world. To 
that end, we continually review our manufacturing 
capacity, capabilities, processes and facilities. We
believe that our manufacturing facilities, together with
the third-party contract manufacturing organizations 
we outsource to, currently provide sufficient capacity 
for our products and the contract manufacturing 
services we provide to Samsung Bioepis, our joint 
venture that develops, manufactures and markets 
biosimilars, and other strategic contract
manufacturing partners. In light of the development of 
our pipeline, we are expanding our production capacity 
by building a large-scale biologics manufacturing 
facility in Solothurn, Switzerland, which is expected to
be operational by the end of the decade.

Manufacturing Facilities

Our drug substance manufacturing facilities 

include:

Facility
RTP, North Carolina

Hillerød, Denmark

Drug Substance Manufactured
ALPROLIX
AVONEX
ELOCTATE
PLEGRIDY
TYSABRI
ZINBRYTA
Other*

TYSABRI
Biosimilars

* Other includes products manufactured for contract

manufacturing partners

In addition to our drug substance manufacturing

facilities, we have a drug product manufacturing 
facility and supporting infrastructure in RTP North
Carolina. This parenteral facility adds capabilities and 
capacity for filling biologics into vials.

PP

PP

We also lease from Eisai an oral solid dose
products manufacturing facility in RTP North Carolina,
where we manufacture TECFIDERA and other oral solid
dose products, including products for Eisai. This 
facility supplements our outsourced small molecule 
manufacturing capabilities. Under our lease 
arrangement, Eisai may provide us with packaging 
services for oral solid dose products. In August 2015
we agreed to purchase this facility following the
expiration of our current three-year lease in the third 
quarter of 2018 and Eisai's completion of certain
activities.

For a period of time following the spin-off of 
Bioverativ, we agreed to manufacture and supply, 
exclusively for Bioverativ, drug substance, drug
product and finished goods with respect to ELOCTATE 
and ALPROLIX and pipeline product candidates.

24

Our Employees

As of December 31, 2016, we had approximately 7,400 employees worldwide.

Our Executive Officers (as of February 2, 2017)

Officer
Michel Vounatsos

Susan H. Alexander

Paul J. Clancy
Gregory F. Covino

Michael D. Ehlers
Paul McKenzie

Kenneth DiPietro

Adriana (Andi) Karaboutis

Current Position
Chief Executive Officer

Executive Vice President, Chief Legal Officer and Corporate
Secretary
Executive Vice President, Finance and Chief Financial Officer
Vice President, Finance and Chief Accounting Officer

Executive Vice President, Research and Development
Executive Vice President, Pharmaceutical Operations and
Technology
Executive Vice President, Human Resources

Executive Vice President, Technology, Business Solutions and
Corporate Affairs

Year
Joined
Biogen
2016

2006

2001
2012

2016
2016

2012

2014

Age
55

60

55
51

48
51

58

54

Alfred W. Sandrock, Jr., M.D., Ph.D. Chief Medical Officer and Executive Vice President of Neurology
Discovery and Development

59

1998

Michel Vounatsos
Experience
Mr. Vounatsos has served as our Chief Executive Officer since January 2017. Prior to that, from April 2016 to
December 2016, Mr. Vounatsos served as our Executive Vice President and Chief Commercial Officer. Prior to
joining Biogen, Mr. Vounatsos spent 20 years at Merck where he most recently served as President, Primary Care,
Customer Business Line. In this role, he led Merck’s global primary care business unit, a role which encompassed
Merck’s cardiology-metabolic, general medicine, women’s health and biosimilars groups and developed and
instituted a strategic framework for enhancing the company’s relationships with key constituents, including the
most significant providers, payers and retailers and the world’s largest governments. Mr. Vounatsos previously held
leadership positions across Europe and in China for Merck. Prior to that, Mr. Vounatsos held management
positions at Ciba-Geigy.
Education

Universite Victor Segalen, Bordeaux II, France, C.S.C.T. Certificate in Medicine
HEC School of Management - Paris, M.B.A.

Susan H. Alexander
Experience
Ms. Alexander has served as our Executive Vice President, Chief Legal Officer and Corporate Secretary since
December 2011. Prior to that, from 2006 to December 2011, Ms. Alexander served as our Executive Vice
President, General Counsel and Corporate Secretary. From 2003 to January 2006, Ms. Alexander served as the
Senior Vice President, General Counsel and Corporate Secretary of PAREXEL International Corporation, a
biopharmaceutical services company. From 2001 to 2003, Ms. Alexander served as General Counsel of IONA
Technologies, a software company. From 1995 to 2001, Ms. Alexander served as Counsel at Cabot Corporation, a
specialty chemicals and performance materials company. Prior to that, Ms. Alexander was a partner at the law
firms of Hinckley, Allen & Snyder and Fine & Ambrogne.
Public Company Boards

Board of Directors of Invacare Corporation, a medical and healthcare product company

Education

Wellesley College, B.A
Boston University School of Law, J.D.

25

Paul J. Clancy
Experience
Mr. Clancy has served as our Executive Vice President, Finance and Chief Financial Officer since August 2007. Mr.
Clancy joined Biogen, Inc. in 2001 and has held several senior executive positions with us, including Vice President
of Business Planning, Portfolio Management and U.S. Marketing, and Senior Vice President of Finance with
responsibilities for leading the Treasury, Tax, Investor Relations and Business Planning groups. Prior to that, he
spent 13 years at PepsiCo, a food and beverage company, serving in a range of financial and general management
positions.
Public Company Boards

Board of Directors of Agios Pharmaceuticals, Inc., a biopharmaceutical company
Board of Directors of Incyte Corporation, a biopharmaceutical company

Education

Babson College, B.S. in Finance
Columbia University, M.B.A.

Gregory F. Covino
Experience
Mr. Covino has served as our Vice President, Finance and Chief Accounting Officer since April 2012. Prior to that,
Mr. Covino served at Boston Scientific Corporation, a medical device company, as Vice President, Corporate
Analysis and Control since March 2010, having responsibility for the company's internal audit function, and as Vice
President, Finance, International from February 2008 to March 2010, having responsibility for the financial
activities of the company's international division. Prior to that, Mr. Covino held several finance positions at Hubbell
Incorporated, an electrical products company, including Vice President, Chief Accounting Officer and Controller from
2002 to January 2008, Interim Chief Financial Officer from 2004 to 2005, and Director, Corporate Accounting from
1999 to 2002.
Education

Bryant University, B.S. in Business Administration

Michael D. Ehlers
Experience
Dr. Ehlers has served as our Executive Vice President, Head of R&D since May 2016. Prior to joining Biogen, Dr.
Ehlers served in leadership positions at Pfizer, Inc., including Senior Vice President & Head BioTherapeutics R&D
and Chief Scientific Officer, Neuroscience & Pain. Prior to that, Dr. Ehlers was the George Barth Geller Professor of
Neurobiology and an Investigator of the Howard Hughes Medical Institute at Duke University Medical Center. He is
the recipient of numerous awards including the Eppendorf & Science Prize in Neurobiology, the John J. Abel Award
in Pharmacology, the Society for Neuroscience Young Investigator Award, a National Institute of Mental Health
MERIT Award, the National Alliance for Schizophrenia and Depression Distinguished Investigator Award, and the
Massachusetts Medical Society Honored Business Leader Award. In 2013, Dr. Ehlers became the 11th recipient of
the Thudichum Medal of the Biochemical Society of the United Kingdom. Past recipients include two Nobel
laureates. Dr. Ehlers has authored over 100 scientific papers, has served on the Editorial Boards of Annual
Reviews in Medicine, Annual Reviews in Pharmacology and Toxicology, the Journal of Neuroscience, the Journal of
Biological Chemistry, the Journal of Molecular and Cellular Neuroscience, and has sat on advisory committees of
the National Institutes of Health.
Outside Affiliations

PhRMA Foundation Basic Pharmacology Advisory Committee
Janelia Research Institute Advisory Committee
McKnight Endowment Fund for Neuroscience Board
World Economic Forum Global Agenda Council on Brain Research

Education

California Institute of Technology, B.S. Chemistry
The John Hopkins University School of Medicine, M.D.
The John Hopkins University School of Medicine, Ph.D. Neuroscience

26

Paul McKenzie
Experience
Dr. McKenzie has served as our Executive Vice President, Pharmaceutical Operations and Technology since July
2016. Prior to that, from February 2016 to June 2016, he served as our Senior Vice President for Global Biologics
Manufacturing & Technical Operations. Prior to joining Biogen, since 2008, Dr. McKenzie held a number of positions
of increasing responsibility at Johnson & Johnson (J&J), including Vice President of R&D for J&J’s Ethicon business
where he led the manufacturing and technical operations team responsible for internal and external manufacturing
of Janssen’s pharmaceutical portfolio. He also ran global Development for Janssen R&D, helping to manage
pipeline activities from discovery through clinical development and commercialization. Prior to J&J, Dr. McKenzie
also held various R&D and manufacturing positions at Bristol-Myers Squibb and Merck & Co.
Education

University of Pennsylvania, B.S. Chemical Engineering
Carnegie Mellon University, Ph.D. Chemical Engineering

Kenneth DiPietro
Experience
Mr. DiPietro has served as our Executive Vice President, Human Resources since January 2012. Mr. DiPietro joined
Biogen from Lenovo Group, a technology company, where he served as Senior Vice President, Human Resources
from 2005 to June 2011. From 2003 to 2005, he served as Corporate Vice President, Human Resources at
Microsoft Corporation, a technology company. From 1999 to 2002, Mr. DiPietro worked as Vice President, Human
Resources at Dell Inc., a technology company. Prior to that, he spent 17 years at PepsiCo, a food and beverage
company, serving in a range of human resource and general management positions.
Public Company Boards

Board of Directors of InVivo Therapeutics Corporation, a medical device company

Education

Cornell University, B.S. in Industrial and Labor Relations

Adriana (Andi) Karaboutis
Experience
Ms. Karaboutis has served as our Executive Vice President, Technology, Business Solutions and Corporate Affairs
since December 2015 and prior to that served as our Executive Vice President, Technology and Business Solutions
since joining Biogen in September 2014. Prior to that, Ms. Karaboutis was Vice President and Global Chief
Information Officer of Dell, Inc., where she was responsible for leading a global IT organization focused on powering
Dell as an end-to-end technology solutions provider. Prior to joining Dell in 2010, Ms. Karaboutis spent over 20
years at General Motors and Ford Motor Company in various international leadership positions including computer-
integrated manufacturing, supply chain operations, and information technology.
Public Company Boards

Board of Directors of Advance Auto Parts, an automotive aftermarket parts provider

Education

Wayne State University, B.S. in Computer Science

Alfred W. Sandrock, Jr., M.D., Ph.D.
Experience
Dr. Sandrock has served as our Chief Medical Officer and Executive Vice President of Neurology Discovery and
Development since November 2015. Prior to that, Dr. Sandrock served as our Chief Medical Officer and Group
Senior Vice President from May 2013 to October 2015, and as our Chief Medical Officer and Senior Vice President
of Development Sciences from February 2012 to April 2013. Prior to that, Dr. Sandrock held several senior
executive positions since joining us in 1998, including Senior Vice President of Neurology Research and
Development and Vice President of Clinical Development, Neurology.
Public Company Boards

Board of Directors of Neurocrine Biosciences, Inc., a life sciences company

Education

Stanford University, B.A. in Human Biology
Harvard Medical School, M.D.
Harvard University, Ph.D. in Neurobiology
Massachusetts General Hospital, internship in Medicine, residency and chief residency in Neurology, and
clinical fellowship in Neuromuscular Disease and Clinical Neurophysiology (electromyography)

27

Available Information

Our principal executive offices are located at 225 Binney Street, Cambridge, MA 02142 and our telephone 
number is (617) 679-2000. Our website address is www.biogen.com. We make available free of charge through the 
Investors section of our website our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports
on Form 8-K and all amendments to those reports as soon as reasonably practicable after such material is 
electronically filed with or furnished to the Securities and Exchange Commission (SEC). We include our website 
address in this report only as an inactive textual reference and do not intend it to be an active link to our website.
The contents of our website are not incorporated into this report.

28

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 will be further 
reliant and concentrated on sales of our MS products in an increasingly competitive market, and revenue from sales
of our product for spinal muscular atrophy. 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; 

•  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 spinal muscular atrophy 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 spinal muscular atrophy;

• 

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 spinal 
muscular atrophy 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 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 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:

• 

• 

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; 

29

•  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. 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. 

30

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 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. In 2017, we may face uncertainties 
as a result of likely 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.

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.

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 (PML), 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.

31

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.

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 extensive current
Good Clinical Practices. If we or our third-party clinical trial providers or third-party contract research organizations 
(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.

32

We have opened clinical sites and are enrolling patients in a number of countries where our experience is more 

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 do 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 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 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.

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.

33

• 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 several 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 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 the development, regulatory 

approval, commercialization and marketing of certain products, which are outside of our full control.

We rely on a number of significant collaborative relationships for revenue, and 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;

•  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, 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

34

•  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 manage 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 
stockholders 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 two companies 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).

There could be significant liability if the separation and distribution is determined to be a taxable transaction.

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.

35

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 expected benefits of the separation and distribution, and such events may 

adversely affect our business.

We may not be able to achieve the full strategic and financial benefits expected to result from the separation 

and distribution, 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 and "hacktivists." 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.

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 greater 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. 

36

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

•  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; 

• 

requirements that provide for increased transparency of clinical trial results and quality data, such as the EMA’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.

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” (BEPS) 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.

37

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;

•  collectability of accounts receivable;

• 

fluctuations in foreign currency exchange rates, in particular the recent strength of the U.S. dollar versus
foreign currencies that 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;

• 

• 

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.

38

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 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.

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 incur significant investment 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; 

39

•

•

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 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 biosimilars is complex. If we encounter any manufacturing or 

supply chain difficulties, we may be unable to meet higher than anticipated demand; and

•  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.

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 a $5.0 

billion stock repurchase program in July 2016. 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 stockholders 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, results of operations, 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.

40

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.

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.  

Item  1B.  

Unresolved Staff Comments

None.

41

Item  2.  

Properties

Below is a summary of our owned and leased properties as of December 31, 2016.

Massachusetts

In Cambridge, Massachusetts, we own approximately 508,000 square feet of real estate space, consisting of a 
building that houses a research laboratory and a cogeneration plant totaling approximately 263,000 square feet and
a building that contains research, development and quality laboratories which total approximately 245,000 square 
feet.

In addition, we lease a total of approximately 1,250,000 square feet in Massachusetts, which is summarized as

follows:

•  893,000 square feet in Cambridge, Massachusetts, which is comprised of a 67,000 square foot biologics 

manufacturing facility, which is subleased by Brammer, and 826,000 square feet for our corporate
headquarters, laboratory and additional office space; and

•  357,000 square feet of office space in Weston, Massachusetts, of which 175,000 square feet has been

subleased through the remaining term of our lease agreement.

Our Massachusetts lease agreements expire at various dates through the year 2028.

North Carolina

In RTP, North Carolina, we own approximately 834,000 square feet of real estate space, which is summarized

PP
as follows:

•  357,000 square feet of laboratory and office space;

•  175,000 square feet related to a large-scale biologics manufacturing facility;

•  105,000 square feet related to a biologics manufacturing facility;

•  84,000 square feet of warehouse space and utilities;

•  70,000 square feet related to a parenteral fill-finish facility; and

•  43,000 square feet related to a large-scale purification facility.

In addition, we lease 188,000 square feet of a facility in RTP North Carolina from Eisai to manufacture our and 

PP

Eisai's oral solid dose products and 40,000 square feet of warehouse space in Durham, North Carolina. 

Denmark

We own a large-scale biologics manufacturing facility totaling approximately 228,000 square feet located in

Hillerød, Denmark.

We also own approximately 306,000 square feet of additional space, which is summarized as follows:

•  139,000 square feet of warehouse, utilities and support space;

•  70,000 square feet related to a label and packaging facility;

•  50,000 square feet related to a laboratory facility; and

•  47,000 square feet of administrative space.

Switzerland

In December 2015 we acquired land in Solothurn, Switzerland where we are building a biologics manufacturing

facility in the Commune of Luterbach over the next several years.

Other International

We lease office space in Zug, Switzerland, our international headquarters, the U.K., Germany, France, Denmark

and numerous other countries. Our international lease agreements expire at various dates through the year 2028.

42

Item  3.  

Legal Proceedings

For a discussion of legal matters as of December 31, 2016, please read Note 20, Litigation to our consolidated 

financial statements included in this report, which is incorporated into this item by reference.

Item  4.  

Mine Safety Disclosures

Not applicable.

43

Item 5.  
Purchases of Equity Securities

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer 

PART II

Market and Stockholder Information

Our common stock trades on The NASDAQ Global Select Market under the symbol “BIIB.” The following table 

shows the high and low sales price for our common stock as reported by The NASDAQ Global Select Market for each 
quarter in the years ended December 31, 2016 and 2015:

First Quarter ....................................................... $
Second Quarter .................................................. $
Third Quarter ...................................................... $
Fourth Quarter .................................................... $

Common Stock Price

2016

High

301.02 $
292.69 $
333.65 $
329.83 $

Low
242.07 $
223.02 $
240.07 $
268.00 $

2015

High

Low

480.18 $
432.88 $
412.24 $
311.65 $

334.40
368.88
265.00
254.00

As of January 27, 2017, there were approximately 700 stockholders of record of our common stock.

Dividends

We have not paid cash dividends since our inception. While we historically have not paid cash dividends and do 

not have a current intention to pay cash dividends, we continually review our capital allocation strategies, including,
among other things, payment of cash dividends, stock repurchases or acquisitions.

Issuer Purchases of Equity Securities

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. Repurchased shares will be
retired.

 The following table summarizes our common stock repurchase activity under our 2016 Share Repurchase 

Program during the fourth quarter of 2016:

Period
October 2016 ..........
November 2016 .......
December 2016 .......
Total......................

Total Number of
Shares Purchased
(#)
1,254,818
939,046
—
2,193,864

Average Price
Paid per Share
($)

298.71
294.24
—
296.80

Total Number of
Shares Purchased
as Part of Publicly
Announced  Programs
(#)
1,254,818 $
939,046 $
— $

Maximum
Approximate Dollar Value
of Shares That May Yet Be
Purchased Under
Our Programs ($ in
millions)

4,276.3
4,000.0
4,000.0

As of December 31, 2016, we repurchased and retired approximately 3.3 million shares of common stock at a

cost of $1.0 billion under the 2016 Share Repurchase Program.

In February 2011 our Board of Directors authorized a program to repurchase up to 20.0 million shares of our 

common stock (2011 Share Repurchase Program), which has been used principally to offset common stock
issuances under our share-based compensation plans. The 2011 Share Repurchase Program does not have an
expiration date. We did not repurchase any shares of common stock under our 2011 Share Repurchase Program
during the year ended December 31, 2016, and have approximately 1.3 million shares remaining available for 
repurchase under this authorization.

44

 
Stock Performance Graph

The graph below compares the five-year cumulative total stockholder return on our common stock, the S&P
500 Index, the Nasdaq Pharmaceutical Index and the Nasdaq Biotechnology Index assuming the investment of 
$100.00 on December 31, 2011 with dividends being reinvested. The stock price performance in the graph below is
not necessarily indicative of future price performance.

2011

2012

2013

2014

2015

2016

Biogen Inc.

NASDAQ Pharmaceutical

S&P 500 Index

NASDAQ Biotechnology

100.00

100.00

100.00

100.00

133.00

114.32

116.00

132.74

254.04

155.11

153.57

220.37

308.45

188.95

174.60

296.19

278.37

199.22

177.01

331.05

257.68

197.05

198.18

260.37

45

Item 6.  

Selected Financial Data

BIOGEN INC. AND SUBSIDIARIES
SELECTED FINANCIAL DATA

Our results of operations are summarized as follows:

(In millions, except per share amounts)
Results of Operations
Product revenues, net (a)......................... $
Revenues from anti-CD20 therapeutic
programs................................................
Other revenues .......................................
Total revenues..................................
Total cost and expenses..........................
Gain on sale of rights ..............................
Income from operations...........................
Other income (expense), net ....................
Income before income tax expense and
equity in loss of investee, net of tax .........
Income tax expense ................................
Equity in loss of investee, net of tax .........
Net income.............................................
Net income (loss) attributable to
noncontrolling interests, net of tax ...........
Net income attributable to Biogen Inc. ...... $

Diluted Earnings Per Share
Diluted earnings per share attributable to
Biogen Inc. ............................................. $
Weighted-average shares used in
calculating diluted earnings per share
attributable to Biogen Inc. .......................

For the Years Ended December 31,

2016

(d) (e)

2015

(d)

2014

(f)

2013

(g)

2012

(h)

9,817.9 $

9,188.5 $

8,203.4 $

5,542.3 $

4,166.1

1,314.5
316.4
11,448.8
6,298.4
—
5,150.4
(217.4)

4,933.0
1,237.3
—
3,695.7

1,339.2
236.1
10,763.8
5,872.8
—
4,891.0
(123.7)

4,767.3
1,161.6
12.5
3,593.2

1,195.4
304.5
9,703.3
5,747.7
16.8
3,972.4
(25.8)

3,946.6
989.9
15.1
2,941.6

1,126.0
263.9
6,932.2
4,441.6
24.9
2,515.5
(34.9)

2,480.6
601.0
17.2
1,862.3

(7.1)
3,702.8 $

46.2
3,547.0 $

6.8
2,934.8 $

—

1,862.3 $

1,137.9
212.5
5,516.5
3,707.4
46.8
1,855.9
(0.7)

1,855.1
470.6
4.5
1,380.0

—
1,380.0

16.93 $

15.34 $

12.37 $

7.81 $

5.76

218.8

231.2

237.2

238.3

239.7

Our financial condition is summarized as follows:

2016

2015

2014

2013

2012

As of December 31,

(In millions)
Financial Condition
Cash, cash equivalents and marketable
securities ............................................... $
3,742.4
Total assets............................................ $ 22,876.8 $ 19,504.8 $ 14,314.7 $ 11,863.3 $ 10,130.1
Notes payable and other financing
arrangements, less current portion (b)...... $
6,512.7 $
Total Biogen Inc. shareholders’ equity (c) .. $ 12,140.1 $

580.3 $
6,521.5 $
9,372.8 $ 10,809.0 $

592.4 $
8,620.2 $

687.4
6,961.5

1,848.5 $

7,724.5 $

3,316.0 $

6,188.9 $

In addition to the following notes, the financial data included within the tables above should be read in 
conjunction with our consolidated financial statements and related notes and the “Management’s Discussion and 
Analysis of Financial Condition and Results of Operations” sections of this report and our previously filed Form 10-Ks.

(a)  Product revenues, net reflect the impact of the following product launches:

•  Commercial sales of SPINRAZA began in the fourth quarter of 2016.

46

•  Under the terms of our collaboration agreement with AbbVie, we began to recognize revenues on sales of 

ZINBRYTA to third parties in the E.U. in the third quarter of 2016. 

•  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 quarter of 2016 and third quarter of 
2016, respectively. 

•  Commercial sales of ALPROLIX commenced in the second quarter of 2014 and commercial sales of 

ELOCTATE and PLEGRIDY commenced in the third quarter of 2014. 

•  TECFIDERA began in April 2013.  

(b)  Notes payable and other financing arrangements reflects the issuance of our senior unsecured notes for an

aggregate principal amount of $6.0 billion in September 2015, and the 2013 repayment of our 6.0% notes that 
were issued in 2008 for an aggregate principal amount of $450.0 million.

(c)  Total Biogen Inc.'s shareholders' equity reflects the repurchase of approximately 32.8 million shares of our 

common stock at a cost of approximately $8.3 billion between 2012 and 2016:

•  During 2016 we repurchased and retired approximately 3.3 million shares of our common stock at a cost 

of $1.0 billion under our 2016 Share Repurchase Program.

•  During 2015 we repurchased and retired approximately 16.8 million shares of our common stock at a 

cost of $5.0 billion under our 2015 Share Repurchase Program.

•  During 2014, 2013 and 2012 we repurchased approximately 2.9 million, 2.0 million and 7.8 million 

shares, respectively of our common stock at a cost of approximately $2.3 billion under our 2011 Share 
Repurchase Program of which approximately 3.7 million of these shares were retired.

(d)  Total cost and expenses for the years ended December 31, 2016 and 2015, include restructuring charges of 

$33.1 million and $93.4 million, respectively. In addition, total cost and expenses for the year ended December 
31, 2016, also include charges to cost of sales totaling $52.4 million of expenses incurred as a result of our 
determination to vacate and cease manufacturing in our small-scale biologics facility in Cambridge, MA as well
as vacate our warehouse in Somerville, MA. Total cost and expenses for year ended December 31, 2016, also
include $18.1 million of costs incurred directly related to our separation of our hemophilia business into an
independent, publicly traded company.  

(e)  Total cost and expenses for the year ended December 31, 2016, includes a pre-tax charge of $454.8 million
related to the January 2017 settlement and license agreement with Forward Pharma A/S (Forward Pharma).

(f) 

In June 2014 AIFA approved a resolution affirming that there is no reimbursement limit from and after February 
2013. As a result, we recognized $53.5 million of TYSABRI revenues in the second quarter of 2014 related to 
the periods beginning February 2013 that were previously deferred.

(g)  Our share of revenues from anti-CD20 therapeutic programs reflects charges of $49.7 million in 2013 for 

damages and interest awarded to Hoechst in Genentech's arbitration with Hoechst for RITUXAN.

(h)  Commencing in the second quarter of 2013 product and total revenues include 100% of net revenues related 

to sales of TYSABRI as a result of our acquisition of all remaining rights to TYSABRI from Elan Pharma 
International, Ltd (Elan), an affiliate of Elan Corporation, plc. Upon the closing, our collaboration agreement was 
terminated, and we no longer record collaboration profit sharing expense. We recognized collaboration profit 
sharing expense of $85.4 million and $317.9 million during the years ended December 31, 2013 and 2012,
respectively. 

47

Management’s Discussion and 

Item 7.  
Analysis of Financial Condition and Results
of Operations

The following discussion should be read in 

conjunction with our consolidated financial 
statements and related notes beginning on page F-1
of this report. Certain totals may not sum due to
rounding.

Executive Summary

Introduction

Biogen is a global biopharmaceutical company 

focused on discovering, developing, manufacturing
and delivering therapies to people living with serious 
neurological, rare and autoimmune diseases.

Our marketed products include TECFIDERA, 
AVONEX, PLEGRIDY, TYSABRI, ZINBRYTA and FAMPYRA
for multiple sclerosis (MS), FUMADERM for the 
treatment of severe plaque psoriasis and SPINRAZA 
for the treatment of spinal muscular atrophy (SMA).
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, and other 
potential anti-CD20 therapies under a collaboration 
agreement with Genentech, Inc. (Genentech), a wholly-
owned member of the Roche Group.

In May 2016 we announced our intention to spin 

off our hemophilia business, Bioverativ Inc. 
(Bioverativ), as an independent, publicly traded 
company. Bioverativ will focus on the discovery, 
development and commercialization of therapies for 
the treatment of hemophilia and other blood 
disorders, including ELOCTATE for the treatment of 
hemophilia A and ALPROLIX for the treatment of 
hemophilia B. Bioverativ will also assume 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. (Sangamo).

On February 1, 2017, we completed the
distribution of all the then outstanding shares of 
common stock of Bioverativ to Biogen stockholders, 
who received one share of Bioverativ common stock 
for every two shares of Biogen common stock. As a 
result of the distribution, Bioverativ is now an
independent public company whose shares of 
common stock are trading under the symbol "BIVV" 
on the Nasdaq Global Select Market.

The financial results of Bioverativ are included in 

our consolidated results of operations and financial
position in our audited consolidated financial
statements for the periods presented in this Form 10-
K. The financial results of Bioverativ will be excluded 
from our consolidated results of operations and 
financial position commencing February 1, 2017. For 
additional information regarding the separation of 
Bioverativ, please read Note 26, Subsequent Events to
our 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 will 
be 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. 

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. For nearly 
two decades we have led in the research and
development of new therapies to treat MS, resulting in 
our leading portfolio of MS treatments. Now our 
research is focused on additional improvements in 
the treatment of MS, such as, the development of 
next generation therapies for MS with a goal to 
reverse or possibly repair damage caused by the 
disease. We are also applying our scientific expertise 
to solve some of the most challenging and complex 
diseases, including Alzheimer's disease, Parkinson's 
disease and amyotrophic lateral sclerosis (ALS), and 
are 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 by developing, manufacturing and marketing

48

were also negatively impacted by a $167.8
million decrease in hedge gains recognized 
under our foreign currency hedging program in 
comparative periods.

•  Revenues from anti-CD20 therapeutic programs 
totaled $1,314.5 million for 2016, representing 
a decrease of 1.8% over the same period in 
2015.

•  Other revenues totaled $316.4 million for 2016, 
representing an increase of 34.0% from the
same period in 2015. This increase was
primarily driven by an increase in other corporate 
revenues, which includes amounts earned with 
respect to our contract manufacturing activities.

•  Total cost and expenses totaled $6,298.4

million for 2016, representing an increase of 
7.2%, compared to the same period in 2015.
This increase was driven by a $454.8 million 
litigation settlement and license charge and a 
19.2% increase in cost of sales, which includes 
a charge of $45.5 million for accelerated
depreciation as a result of the determination to 
cease manufacturing in Cambridge, MA and 
vacate our biologics manufacturing facility in 
Cambridge, MA and warehouse space in 
Somerville, MA. These increases were partially 
offset by a 7.8% decrease in selling, general and 
administrative expenses and a decrease in 
restructuring charges.

We generated $4,522.4 million of net cash
flows from operations for 2016, which were primarily 
driven by earnings. Cash, cash equivalents and
marketable securities totaled approximately $7,724.5
million as of December 31, 2016.

During the year ended December 31, 2016, we 

repurchased and retired approximately 3.3 million 
shares of common stock at a cost of $1.0 billion
under our share repurchase programs. 

Collaborative and Other Relationships

In May 2016 we entered into a collaboration and 
alliance with the University of Pennsylvania (UPenn) to 
advance gene therapy and gene editing technologies. 
For additional information related to this transaction,
please read Note 19, Collaborative and Other 
Relationships to our consolidated financial statements 
included in this report.

biosimilars through Samsung Bioepis, our joint 
venture with Samsung BioLogics Co. Ltd. (Samsung
Biologics). Under our commercial agreement with 
Samsung Bioepis, we market and sell BENEPALI, an
etanercept biosimilar referencing ENBREL, and
FLIXABI, an infliximab biosimilar referencing 
REMICADE, in the European Union (E.U.).

Financial Highlights

Diluted earnings per share attributable to Biogen 

Inc. were $16.93 for 2016, representing an increase
of 10.4% over the same period in 2015.

As described below under “Results of 

Operations,” our income from operations for the year 
ended December 31, 2016, reflects the following:

•  Total revenues were $11,448.8 million for 2016,
representing an increase of 6.4% over the same 
period in 2015.

•  Product revenues, net totaled $9,817.9 million

for 2016, representing an increase of 6.8% over 
the same period in 2015. This increase was
driven by a 9.1% increase in worldwide
TECFIDERA revenues, a 52.8% increase in 
worldwide hemophilia revenues, a 4.1% increase 
in worldwide TYSABRI revenues and revenues
from BENEPALI. These increases are partially 
offset by a 5.8% decrease in worldwide 
Interferon revenues. Product revenues, net for 
2016, compared to the same period in 2015,

49

Restructuring and Cost Saving Initiatives

Business Environment

During the third quarter of 2016 we initiated cost

saving measures primarily intended to realign our 
organizational structure due to the changes in roles
and workforce resulting from our decision to spin off 
our hemophilia business, and to achieve further 
targeted cost reductions. 

Additionally, in connection with the transaction to

sublease our rights to the manufacturing facility in 
Cambridge, MA to Brammer Bio MA, LLC (Brammer),
certain employees were separated from Biogen.

For additional information related to our 
restructuring and cost saving initiatives, please read 
Note 3, Restructuring, Business Transformation and 
Other Cost Saving Initiatives to our consolidated
financial statements included in this report.

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, prodrugs of existing therapeutics or 
biosimilars of existing products and other 
technologies, such as gene therapies and bispecific
antibodies. 

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 intense
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.

Results of Operations

Revenues

Revenues are summarized as follows:

(In millions, except percentages)
Product Revenues:

For the Years Ended
December 31,

2016

2015

2014

% Change

2016 
compared to
2015

2015
compared to
2014

United States ..................................... $
Rest of world......................................
Total product revenues....................

7,050.4 $
2,767.5
9,817.9

6,545.8 $
2,642.7
9,188.5

Revenues from anti-CD20 therapeutic
programs .............................................
Other revenues.....................................

1,314.5
316.4

1,339.2
236.1

Total revenues................................ $ 11,448.8 $ 10,763.8 $

5,566.7
2,636.7
8,203.4

1,195.4
304.5
9,703.3

7.7 %
4.7 %
6.8 %

(1.8)%
34.0 %
6.4 %

17.6 %
0.2 %
12.0 %

12.0 %
(22.5)%
10.9 %

50

Product Revenues

Product revenues are summarized as follows:

(In millions, except percentages)
Multiple Sclerosis:

TECFIDERA ........................................ $
Interferon* ........................................
TYSABRI............................................
FAMPYRA...........................................
ZINBRYTA..........................................
Hemophilia: .........................................
ELOCTATE..........................................
ALPROLIX ..........................................

Other product revenues:

513.2
333.7

FUMADERM .......................................
SPINRAZA..........................................
BENEPALI ..........................................
FLIXABI .............................................

Total product revenues ..................... $

45.9
4.6
100.6
0.1
9,817.9 $

* Interferon includes AVONEX and PLEGRIDY.
** Percentage not meaningful.

Multiple Sclerosis (MS)

TECFIDERA

For 2016 compared to 2015, the increase in
U.S. TECFIDERA revenues was primarily due to price 
increases, partially offset by higher discounts and 
allowances and a decrease in unit sales volume of 
1%. 

For 2015 compared to 2014, the increase in

U.S. TECFIDERA revenues was primarily due to 
increases in unit sales volume of 13% as TECFIDERA 
penetrated the U.S. market, and increases in gross 

51

For the Years Ended
December 31,

2016

2015

2014

% Change

2016 
compared to
2015

2015
compared to
2014

3,968.1 $
2,795.2
1,963.8
84.9
7.8

3,638.4 $
2,968.7
1,886.1
89.7
—

2,909.2
3,057.6
1,959.5
80.2
—

9.1 %
(5.8)%
4.1 %
(5.4)%
**

25.1 %
(2.9)%
(3.7)%
11.8 %
**

319.7
234.5

51.4
—
—
—

9,188.5 $

58.4
76.0

60.5 %
42.3 %

447.4 %
208.6 %

62.5
—
—
—
8,203.4

(10.7)%
**
**
**
6.8 %

(17.8)%
**
**
**
12.0 %

price partially offset by higher discounts and 
allowances.

For 2016 compared to 2015, the increase in rest 

of world TECFIDERA revenues was primarily due to 
increases in unit sales volume of 32% 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. Rest 
of world TECFIDERA revenues for 2016, compared to 
2015, were also negatively impacted by a $50.2
million decrease in hedge gains recognized under our 
foreign currency hedging program in the comparative 
period. 

For 2015 compared to 2014, the increase in rest 

of world TECFIDERA revenues was primarily due to 
increases in unit sales volume in existing markets
and in new markets as we continue to launch the
product and expand our presence around the world. 
These increases were partially offset by pricing 
reductions in Germany as described below. Rest of 
world TECFIDERA revenues for 2015, compared to 
2014, were also negatively impacted by foreign 
currency exchange losses totaling $74.1 million.
These foreign currency exchange losses were partially 
offset by comparative net gains recognized under our 
foreign currency hedging program totaling $47.5
million.

Under German legislation related to the pricing 

For 2015 compared to 2014, the increase in

U.S. Interferon revenues was primarily due to gross 
price increases for AVONEX and an increase in 
PLEGRIDY unit sales volume as sales of PLEGRIDY 
began in the U.S. in fourth quarter of 2014. These 
increases were partially offset by a decrease in 
AVONEX unit sales volume of 17%, which was
attributable in part to patients transitioning to other 
oral MS therapies, including TECFIDERA.

For 2016, 2015 and 2014 rest of world AVONEX 

revenues totaled $638.2 million, $840.0 million and 
$1,056.4 million, respectively.

For 2016, 2015 and 2014, rest of world 
PLEGRIDY revenues totaled $176.7 million, $111.4 
million and $16.7 million, respectively.

For 2016 compared to 2015, the decrease in

rest of world Interferon revenues was primarily due to 
pricing reductions in certain European countries and
an overall decrease in AVONEX unit sales volume of 
10% due primarily to patients transitioning to other 
oral MS therapies, including TECFIDERA. Rest of world 
Interferon revenues for 2016, compared to 2015,
were also negatively impacted by a $66.1 million
decrease in hedge gains recognized under our 
hedging program in the comparative period.

For 2015 compared to 2014, the decrease in

rest of world Interferon revenues was due to a 
decrease in AVONEX unit sales volume of 11% 
primarily in Europe attributable to patients
transitioning to other oral MS therapies, including 
TECFIDERA. These increases were partially offset by 
an increase in PLEGRIDY unit sales volume as sales 
of PLEGRIDY began in the E.U. in the third quarter of 
2014. Rest of world Interferon revenues for 2015,
compared to 2014, were also negatively impacted by 
foreign currency exchange losses of $153.1 million.
These foreign currency exchange losses were partially 
offset by comparative net gains recognized under our 
foreign currency hedging program of $58.4 million.

We expect that overall Interferon revenues will 
continue to decline as a result of competition from 
our other products as well as other MS therapies.

of new drug products introduced in the German
market, pricing is unregulated for the first 12 months
after launch. We launched TECFIDERA in Germany in 
February 2014 and our unregulated pricing ended in
the first quarter of 2015, at which time we began
recognizing revenue at the fixed price established
through our negotiations with the German regulatory 
authorities. The negotiated annual price is fixed for 
three years.

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 and
product candidates for MS, including OCREVUS.

Interferon

AVONEX and PLEGRIDY

For 2016, 2015 and 2014, U.S. AVONEX 
revenues totaled $1,675.3 million, $1,790.2 million
and $1,956.7 million, respectively.

For 2016, 2015 and 2014, U.S. PLEGRIDY 
revenues totaled $305.0 million, $227.1 million and 
$27.8 million, respectively.

For 2016 compared to 2015, the decrease in

U.S. Interferon revenues was primarily due to an 
overall decrease in Interferon unit sales volume of 
10%, which was attributable to a decrease in AVONEX 
unit sales volume primarily due to patients
transitioning to other oral MS therapies, as well as
higher discounts and allowances. These decreases
were partially offset by price increases.

52

TYSABRI

For 2016 compared to 2015, the increase in

U.S. TYSABRI revenues was primarily due to an 
increase in unit sales volume of 4% and increases in 
price, partially offset by higher discounts and 
allowances. 

For 2015 compared to 2014, the increase in

U.S. TYSABRI revenues was primarily due to an 
increase in unit sales volume of 4% and increases in 
gross price, partially offset by higher discounts and
allowances. 

For 2016 compared to 2015, the slight 
decrease in rest of world TYSABRI revenues was 
primarily due to the impact of a $46.1 million 
decrease in hedge gains recognized under our 
hedging program in the comparative period. This 
decrease was partially offset by an increase in unit 
sales volume of 8%, primarily in Europe.

For 2015 compared to 2014, the decrease in
rest of world TYSABRI revenues was due to pricing 
reductions in some European countries and the prior 
year recognition of $53.5 million of revenue previously 
deferred in Italy relating to the pricing agreement with
the Italian National Medicines Agency (Agenzia 
Italiana del Farmaco or AIFA) as discussed below.

Rest of world TYSABRI revenues for 2015,
compared to 2014, were negatively impacted by 
foreign currency exchange losses of $136.3 million.
These foreign currency exchange losses were partially 
offset by comparative net gains recognized under our 
foreign currency hedging program of $45.9 million.

In the fourth quarter of 2011 Biogen Italia SRL, 
our Italian subsidiary, received a notice from AIFA that 
sales of TYSABRI after mid-February 2009 exceeded a 
reimbursement limit established pursuant to a Price
Determination Resolution (Price Resolution) granted 
by AIFA in December 2006. In January 2017, we 
negotiated an agreement in principle with AIFA's Price 
and Reimbursement Committee to settle all of AIFA's
existing claims relating to sales of TYSABRI in excess
of the reimbursement limit for the periods from 
February 2009 through January 2013 for an 
aggregate repayment of EUR37.4 million. The 
agreement is subject to ratification by AIFA. If this
most recent settlement agreement is accepted, we 
could recognize approximately EUR42 million in 
revenue upon resolution of this matter. For 
information regarding our agreement with AIFA relating 
to sales of TYSABRI in Italy, please read Note 17, 
Other Consolidated Financial Statement Detail to our 
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 and 
product candidates for MS, including ZINBRYTA and
OCREVUS.

ZINBRYTA

Under the terms of our collaboration agreement

with 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 19, Collaborative and
Other Relationships to our consolidated financial
statements included in this report.

53

Hemophilia

ELOCTATE

ALPROLIX

For 2016 compared to 2015, the increase in
U.S. ELOCTATE revenues was primarily due to an 
increase in unit sales volume of 45%.

For 2015 compared to 2014, the increase in

U.S. ELOCTATE revenues was primarily due to
increases in unit sales volume. Sales of ELOCTATE in 
the U.S. began in the third quarter of 2014.

For 2016 compared to 2015, the increase in rest

of world ELOCTATE revenues was primarily due to an 
increase in unit sales volume, primarily in Japan.

For 2015 compared to 2014, the increase in rest

of world ELOCTATE revenues was primarily due to
increases in unit sales volume. Sales of ELOCTATE in 
Japan began in the first quarter of 2015.

For 2016 compared to 2015, the increase in

U.S. ALPROLIX revenues was primarily due to an
increase in unit sales volume of 28%.

For 2015 compared to 2014, the increase in

U.S. ALPROLIX revenues was primarily due to 
increases in unit sales volume. Sales of ALPROLIX in
the U.S. began in the second quarter of 2014.

For 2016 compared to 2015, the increase in rest

of world ALPROLIX revenues was primarily due to an 
increase in unit sales volume, primarily in Japan.

For 2015 compared to 2014, the increase in rest

of world ALPROLIX revenues was primarily due to 
increases in unit sales volume. Sales of ALPROLIX in
Japan began in the fourth quarter of 2014.

On February 1, 2017, we completed the
distribution of the then outstanding shares of 
common stock of Bioverativ to Biogen stockholders.
As a result of the distribution, Bioverativ will assume
discovery, development and commercialization of 
ELOCTATE and ALPROLIX in the U.S.

For additional information on the transaction to
separate from and spin off our hemophilia business
as a separate independent public company, please 
read Note 26, Subsequent Events to our consolidated
financial statements included in this report.

54

Biosimilars

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

RITUXAN and GAZYVA

The following table provides a summary of 

amounts comprising our share of pre-tax profits on
RITUXAN and GAZYVA in the U.S.:

For the Years Ended
December 31,

2014

2016

2015

(In millions)
Product
revenues, net ..... $3,941.8 $3,847.9 $3,556.6
Cost and
expenses ...........
Pre-tax profits in
the U.S. ............. $3,197.3 $3,174.2 $2,785.5
Biogen's share of
pre-tax profits ..... $1,249.5 $1,269.8 $1,117.1

673.7

744.5

771.1

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 quarter of 2016 and 
third quarter of 2016, respectively.

For additional information on our relationship 

with Samsung Bioepis, please read Note 19, 
Collaborative and Other Relationships to our 
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:

Our share of RITUXAN pre-tax profits in the U.S.

decreased to 39% from 40% as GAZYVA was approved
by the FDA in follicular lymphoma in February 2016.

For 2016 compared to 2015, the increase in

U.S. product revenues was primarily due to an
increase in GAZYVA unit sales volume of 41%, an 
increase in RITUXAN unit sales of 1% and selling price
increases, partially offset by higher RITUXAN
discounts and allowances.

For 2015 compared to 2014, the increase in

U.S. product revenues was primarily due to a 4%
increase in RITUXAN unit sales volume and selling
price increases, partially offset by higher discounts
and allowances.

Collaboration costs and expenses for 2016 
compared to 2015 increased primarily due to an
increase in RITUXAN product cost of sales.

Collaboration costs and expenses for 2015
compared to 2014 decreased primarily due to the
2014 recognition of $53.9 million of additional
Branded Pharmaceutical Drug (BPD) fee expense as
well as lower RITUXAN cost of sales, partially offset by 
higher GAZYVA sales and marketing expenses. During
2014 the Internal Revenue Service issued final
regulations related to the BPD fee, which had the
effect of changing the recognition of the fee for 
accounting purposes, from the period in which the fee
was paid, to the period when the sale occurs. As a
result of these final regulations, we recognized an
incremental BPD fee in 2014 for the periods 2013
through the end of the third quarter of 2014. The final 
regulations did not change the timing of payments.

55

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 this report.

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 2016 compared to 2015, and 2015
compared to 2014, revenue on sales in the rest of 
world for RITUXAN decreased as a result of lower pre-
tax co-promotion profits on RITUXAN in Canada.

Other Revenues

Other revenues are summarized as follows:

(In millions, except percentages)
Revenues from collaborative and other
relationships .......................................... $
Other royalty and corporate revenues .......
Total other revenues ............................... $

Ended December 31,

2016

2015

2014

% Change

2016
compared to
2015

2015
compared to
2014

39.3 $

277.1
316.4 $

69.1 $

167.0
236.1 $

58.5
246.0
304.5

(43.1)%
65.9 %
34.0 %

18.1 %
(32.1)%
(22.5)%

For additional information on our collaborative 

and other relationships, please read Note 19, 
Collaborative and Other Relationships to our 
consolidated financial statements included in this 
report.

Other Royalty and Corporate Revenues

Revenues from Collaborative and Other 

Relationships

Revenues from collaborative and other 
relationships include revenues earned under our 
manufacturing services agreement with Sobi on 
shipments of ELOCTA and ALPROLIX to Sobi, royalties 
from Sobi on sales of ELOCTA and ALPROLIX in their 
territory, which includes substantially all of Europe,
Russia and certain markets in Northern Africa and the 
Middle East (the Sobi Territory), 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.

For 2016 compared to 2015, the decrease in
revenues from collaborative and other relationships is 
primarily due to a net overall loss in the collaboration
with AbbVie of $21.9 million within the U.S. territory 
and lower revenues earned under our manufacturing
services agreement with Samsung Bioepis, partially 
offset by an increase in ELOCTA shipments made 
under our manufacturing services agreement with 
Sobi. 

For 2015 compared to 2014, the increase in

revenues from collaborative and other relationships 
was primarily due to the start of product shipments to
Sobi in relation to our collaboration agreement, as 
well as increased revenues earned under our 
manufacturing services agreement with Samsung 
Bioepis.

56

Royalty Revenues

We receive royalties from net sales on products 

related to patents that we have out-licensed. Prior to
2015, our most significant source of royalty revenue 
had been derived from net worldwide sales of 
ANGIOMAX, which was out-licensed to The Medicines
Company. On December 15, 2014 we ceased 
recognizing royalty revenues from U.S. sales of 
ANGIOMAX, contemporaneous with the U.S. patent's
expiration.

For 2016 compared to 2015, royalty revenues 

were relatively consistent.

For 2015 compared to 2014, royalty revenues 

decreased primarily due to the expiration of U.S.
patent rights that gave rise to royalty payments 
related to ANGIOMAX.

Other Corporate Revenues

Our corporate partner revenues include amounts

earned under contract manufacturing agreements.

For 2016 compared to 2015, as well as 2015

compared to 2014, to the increase in other corporate
revenues was primarily due to higher contract 
manufacturing revenues related to drug substance
manufacturing provided to a strategic partner.

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 years ended December 31, 2016, 2015
and 2014, reserves for discounts and allowances as
a percentage of gross product revenues were 21.3%,
19.3% and 16.6%, respectively.

Discounts

Discounts include trade term discounts and

wholesaler incentives. 

For 2016 compared to 2015, the increase in

discounts was primarily driven by increases in gross
selling price, contractual discount rates and volume 
related to our hemophilia products.

For 2015 compared to 2014, the increase in

discounts was primarily driven by our recent product 
additions, gross price increases and increases in
contractual rates

Contractual Adjustments

Contractual adjustments relate to Medicaid and

managed care rebates, co-payment assistance
(copay), Veterans Administration (VA), Public Health 
Service (PHS) discounts, specialty pharmacy program 
fees and other government rebates or applicable
allowances. 

For 2016 compared to 2015, 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.

57

For 2015 compared to 2014, the increase in 

contractual adjustments was primarily due to our 
recent product additions, higher Medicaid and other 
governmental rebates and allowances in the U.S. and 
managed care rebates as a result of an increase in
contracted business and gross prices.

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

Cost and Expenses

A summary of total cost and expenses is as follows:

product expiration. Provisions for product returns are
recorded in the period the related revenue is
recognized, resulting in a reduction to product sales.

For 2016 compared to 2015, and 2015

compared to 2014, return reserves decreased
primarily due to a reduction in return rates based on
recent experiences of returned products.

For additional information related to our 
reserves, please read Note 4, Reserves for Discounts
and Allowances to our consolidated financial
statements included in this report.

(In millions, except percentages)
Cost of sales, excluding amortization of
acquired intangible assets ...................... $
Research and development.....................
Selling, general and administrative ..........
Amortization of acquired intangible
assets...................................................
Restructuring charges.............................
(Gain) loss on fair value remeasurement
of contingent consideration.....................
Collaboration profit sharing .....................
TECFIDERA litigation settlement and
license charges......................................

Total cost and expenses................... $

For the Years Ended
December 31,

2016

2015

2014

% Change

2016 
compared to 
2015

2015
compared to 
2014

1,478.7 $
1,973.3
1,947.9

1,240.4 $
2,012.8
2,113.1

1,171.0
1,893.4
2,232.3

385.6
33.1

14.8
10.2

454.8
6,298.4 $

382.6
93.4

30.5
—

—

5,872.8 $

489.8
—

(38.9)
—

—
5,747.7

19.2 %
(2.0)%
(7.8)%

0.8 %
(64.6)%

(51.5)%
**

**
7.2 %

5.9 %
6.3 %
(5.3)%

(21.9)%
**

(178.4)%
**

**
2.2 %

** Percentage not meaningful.

58

Cost of Sales, Excluding Amortization of Acquired 

Royalty Cost of Sales

For 2016 compared to 2015, the increase in

royalty cost of sales was primarily driven by the
increase in royalty rates payable to Sobi, increased 
sales of our hemophilia products and higher royalties 
on sales of AVONEX and PLEGRIDY in the U.S., 
partially offset by a decrease in TYSABRI royalties due 
to the expiration of certain third party royalties.

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. This 
patent 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 the life of the patent.

For 2015 compared to 2014, the increase in

royalty cost of sales was primarily driven by the
increase in royalties due to Sobi on increased sales 
of our hemophilia products and an increase in the
contractual rate of TYSABRI contingent payments due
to Perrigo Company plc (Perrigo), which is based on 
the expected level of annual worldwide net sales of 
TYSABRI, partially offset by a decrease in TYSABRI
revenues and the expiration of certain third-party 
royalties related to TYSABRI. 

For additional information on our relationship 

with Sobi, please read Note 19, Collaborative and
Other Relationships to our consolidated financial 
statements included in this report.

Intangible Assets (Cost of Sales)

Product Cost of Sales

For 2016 compared to 2015, the increase in

product cost of sales was primarily driven by 
increased contract manufacturing shipments and 
higher unit sales volume related to our biosimilars
and hemophilia products, partially offset by favorable 
production costs and mix of products. 

Product cost of sales for 2016 also reflects the

recognition of $45.5 million of accelerated
depreciation as a result of the determination to cease 
manufacturing in Cambridge, MA and vacate our 
biologics manufacturing facility in Cambridge, MA and 
warehouse space in Somerville, MA.

For 2015 compared to 2014, the increase in

product cost of sales was primarily driven by 
increased contract manufacturing production and
higher unit sales volume of our marketed products, 
including newly launched products.

Inventory amounts written down as a result of 

excess, obsolescence, unmarketability or other 
reasons totaled $48.2 million, $41.9 million and 
$50.6 million for the years ended December 31,
2016, 2015 and 2014, respectively.

59

Research and Development

60

Research and development expense incurred in 

The increase in spending associated with our 

late stage programs for 2016 compared to 2015 was
primarily driven by costs incurred to advance our 
aducanumab program for Alzheimer's disease, the
increased costs incurred to advance our SPINRAZA
program for the treatment of SMA and the 
advancement of E2609 to a late stage program in the 
fourth quarter of 2016, partially offset by the approval
of ZINBRYTA in the third quarter of 2016.

For 2015 compared to 2014, the increase in
research and development expense was primarily 
related to increases in costs incurred in connection
with our late and early stage programs and research
and discovery, partially offset by a decrease in
milestone and upfront expenses and the positive
impact of foreign currency translation of $34.0
million.

The increase in spending associated with our 

late stage programs for 2015 compared to 2014 was
primarily driven by costs incurred to advance our 
aducanumab program for Alzheimer's disease and the
SPINRAZA program for the treatment of SMA, partially 
offset by a decrease in costs related to ZINBRYTA and
the approvals of PLEGRIDY and ELOCTATE in 2014.

The increase in spending associated with our 

early stage programs for 2015 compared to 2014
was primarily due to costs incurred in connection with 
our aducanumab program for Alzheimer's disease,
which advanced to a late stage program during the
third quarter of 2015, the BAN2401 program for 
Alzheimer’s disease related to our collaboration with
Eisai and our BIIB074 program for TGN. These 
increases were partially offset by a decrease in costs
incurred in connection with the SPINRAZA program for 
the treatment of SMA as the program advanced to a
late stage program during the first quarter of 2015.

We intend to continue committing significant

resources to targeted research and development
opportunities where there is a significant unmet need
and where the drug candidate has the potential to be
highly differentiated. Specifically, we intend to
continue to invest in our MS pipeline, our 
aducanumab program, the BAN2401 and E2609
programs and our BIIB074 program.

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. Other 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 and other 
facility-based expenses. Costs are reflected in the
development stage based upon the program status
when incurred. Therefore, the same program 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 2016 compared to 2015, the decrease in 

research and development expense was primarily 
related to decreases in costs incurred in connection
with our early stage programs, marketed products and
other research and development costs. These
decreases were partially offset by increased costs
incurred in connection with our late stage programs
and research and discovery.

The decrease in spending associated with our 

early stage programs for 2016 compared to 2015
was primarily due to the advancement of our 
aducanumab program for Alzheimer's disease to a
late stage program in the third quarter of 2015,
decreased costs incurred in connection with
opicinumab in MS and the discontinuance of 
development of anti-TWEAK in lupus nephritis. These
decreases were partially offset by increased costs of 
BIIB074 (formerly known as Raxatrigine) in trigeminal 
neuralgia (TGN) and increased costs associated with
our discontinuance of development of amiselimod in
the third quarter of 2016.

The decrease in spending associated with our 
marketed products for 2016 compared to 2015 was 
primarily due to the discontinuance of development of 
TYSABRI and TECFIDERA in secondary primary 
multiple sclerosis (SPMS) in the third and fourth 
quarters of 2015, respectively, and decreased costs 
incurred in connection with our hemophilia products.
These decreases were partially offset by the
approvals of ZINBRYTA and SPINRAZA in the third and 
fourth quarters of 2016, respectively.

61

Milestone and Upfront Expenses included in 

Selling, General and Administrative

Research and Development Expense

Research and development expense for 2016

includes a $75.0 million license fee paid to Ionis as 
we exercised our option to develop and commercialize
SPINRAZA from Ionis, a $50.0 million milestone 
payment due to Eisai related to the initiation of a
Phase 3 trial for E2609 and a $20.0 million upfront
milestone paid to the UPenn upon entering into a
collaboration and alliance. For additional information 
about these transactions, please read Note 19,
Collaborative and Other Relationships to our 
consolidated financial statements included in this
report. 

Research and development expense for 2015
includes $60.0 million recorded upon entering into 
our collaboration with Mitsubishi Tanabe Pharma
Corporation (MTPC), $48.1 million recorded upon 
entering into our collaboration with Applied Genetic
Technologies Corporation (AGTC), $30.0 million 
recorded as milestones in relation to our collaboration
agreements with Ionis and $16.0 million paid to 
AbbVie related to milestones for the development of 
ZINBRYTA as a result of filing with the FDA and EMA 
during the year. For additional information about these
transactions, please read Note 19, Collaborative and
Other Relationships to our consolidated financial
statements included in this report. 

Research and development expense for 2014

includes $139.3 million recorded in connection with 
our collaboration agreement with Eisai Co., Ltd. 
(Eisai), $25.0 million recorded as milestones in
relation to our collaboration agreements with Ionis 
and an aggregate of $60.0 million related to upfront 
payments made to Sangamo and Google Inc. and for 
other strategic business arrangements. 

These payments are classified as research and
development expense as the programs they relate to
had not achieved regulatory approval as of the 
payment date.

For 2016 compared to 2015, the decrease in

selling, general and administrative expenses reflects 
cost savings in connection with our corporate
restructuring, which are described below under the
heading "Restructuring Charges," partially offset by 
an increase in costs associated with developing
commercial capabilities for ZINBRYTA and SPINRAZA.

For 2015 compared to 2014, the decrease in
selling, general and administrative expenses was 
driven by a decrease in corporate giving, incentive
compensation and the positive impact of foreign
currency translation of $87.6 million, partially offset
by an increase of $38.9 million of BPD fee expense. 

Amortization of Acquired 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.

62

Our most recent long range planning cycle was
completed in the third quarter of 2016. Based upon
this analysis, the estimated future amortization of 
acquired intangible assets is expected to be as
follows:

(In millions)
2017 ........................................... $
2018 ...........................................
2019 ...........................................
2020 ...........................................
2021 ...........................................

As of December 31,
2016

334.8

312.7

295.2

259.7

242.8

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.

For 2016 compared to 2015, the amortization of 

acquired intangible assets was relatively consistent
as our most recent analysis completed during the 
third quarter of 2016 resulted in no significant net
change in our expected rate of amortization for 
acquired intangible assets.

For 2015 compared to 2014, the decrease in

amortization of acquired intangible assets was 
primarily driven by a decrease in AVONEX revenues 
during the comparative periods and the impact of 
higher expected lifetime revenues of AVONEX due to a 
slower than previously expected adoption of 
PLEGRIDY. Amortization of acquired intangible assets 
during 2014 included total impairment charges of 
$50.9 million related to one of our out-licensed
patents and one of our in-process research and
development (IPR&D) intangible assets.

For additional information related to the 
amortization of acquired intangible assets, please 
read Note 6, Intangible Assets and Goodwill to our 
consolidated financial statements included in this 
report.

Impairment of Intangible Assets

We record charges associated with impairments

of intangible assets in amortization of intangible 
assets.

During 2016 we terminated our collaboration
agreements with Rodin Therapeutics, Inc. and Ataxion 
Inc., resulting in impairment losses of $8.7 million 
and $3.5 million, respectively, related to the IPR&D
assets recorded upon entering into the collaboration
agreements.

 Impairment charges related to our intangible 

assets during 2015 were insignificant.

During 2014 we recorded a charge of $34.7
million related to the impairment of one of our out-
licensed patents to reflect a change in its estimated 
fair value, due to a change in the underlying
competitive market for that product.

During 2014 we updated the probabilities of 
success related to the early stage programs acquired 
through our recent acquisitions. This change in 
probability of success, combined with a delay in one
of the projects, resulted in an impairment loss of 
$16.2 million. 

For additional information, please read Note 6, 

Intangible Assets and Goodwill to our consolidated 
financial statements included in this report.

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 or life cycle management 
strategies are evaluated regularly. We review amounts 

63

capitalized as acquired IPR&D for impairment at least
annually, as of October 31, and whenever events or 
changes in circumstances indicate 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.

Restructuring, Business Transformation and Other 

Cost Saving Initiatives

2015 Cost Saving Initiatives

2015 Restructuring Charges

On October 21, 2015, we announced a 

corporate restructuring, which included the 
termination of certain pipeline programs and an 11% 
reduction in workforce. As a result of these initiatives,
we reduced our annual run rate of operating expenses
by $250 million and reinvested these savings to
support the advancement of our high potential 
pipeline candidates and key commercial activities. 

Under this restructuring, cash payments were

estimated to total $120 million, of which $15.9 
million were related to previously accrued 2015
incentive compensation, resulting in net restructuring
charges totaling approximately $102.0 million. These
amounts were substantially incurred and paid by the 
end of 2016. 

For the years ended December 31, 2016 and 
2015, we recognized total net restructuring charges of 
$8.0 million and $93.4 million, respectively.

The following table summarizes the charges and 

spending related to our 2015 restructuring program
during 2016:

Workforce
Reduction

Pipeline
Programs

Total

Restructuring reserve
as of December 31,
2015 ......................... $ 33.7 $
Expense .....................
Payment.....................
Adjustments to
previous estimates,
net.............................
Restructuring reserve
as of December 31,
2016 ......................... $

4.9
(31.2)

2.2 $

(5.2)

3.6 $ 37.3
10.3
5.4
(40.2)
(9.0)

2.9

(2.3)

2.9 $

5.1

2016 Organizational Changes and Cost Saving 

Initiatives

2016 Restructuring Charges

During the third quarter of 2016 we initiated
additional cost saving measures primarily intended to 
realign our organizational structure due to the
changes in roles and workforce resulting from our 
decision to spin off our hemophilia business, and to
achieve further targeted cost reductions. For 2016 we
recognized charges totaling $17.7 million related to
this effort, which are in addition to, and separate
from, the 2015 corporate restructuring described
above. These amounts, which were substantially 
incurred and paid by the end of 2016, are primarily 
related to severance and are reflected in restructuring
charges in our consolidated statements of income.

Cambridge, MA Manufacturing Facility

In June 2016 following an evaluation of our 
current and future manufacturing capabilities and
capacity needs, we determined that we intend to
vacate and cease manufacturing in our 67,000
square foot small-scale biologics manufacturing
facility in Cambridge, MA and also vacate our 46,000
square foot warehouse space in Somerville, MA.

In December 2016 we subleased our rights to 

the manufacturing facility in Cambridge, MA to
Brammer. Brammer also purchased from us certain
manufacturing equipment, leasehold improvements
and other assets in exchange for shares of Brammer 
common LLC interests and assumed manufacturing
operations effective January 1, 2017. In December 
2016 we also closed and vacated our warehouse
space in Somerville, MA.

64

The loss on fair value remeasurement of 
contingent consideration for 2015 was primarily due
to changes in the expected timing and probabilities of 
success related to the achievement of certain 
developmental milestones and in the discount rate.

The gain on fair value remeasurement of 
contingent consideration for 2014 was primarily due
to an adjustment to the value of our contingent 
consideration liabilities as we updated the 
probabilities of success related to the early stage 
programs acquired through our recent acquisitions. 
For additional information, please read Note 7, Fair 
Value Measurements to our consolidated financial 
statements included in this report.

Collaboration Profit (Loss) Sharing

Our departure from these facilities shortened the 

expected useful lives of certain leasehold
improvements and other assets at these facilities. As 
a result, we recorded additional depreciation expense 
to reflect the assets' new shorter useful lives. For the 
year ended December 31, 2016, we recognized
approximately $45.5 million of this additional
depreciation, which was recorded as cost of sales in
our consolidated statement of income.

Under the terms of the agreement, Brammer will 

also provide manufacturing and other transition and
support services to us.

In the fourth quarter of 2016 we recognized
charges totaling $7.4 million for severance costs 
related to certain employees separated from Biogen
in connection with this transaction. These amounts
will be substantially incurred and paid by the end of 
the first quarter of 2017 and are reflected in 
restructuring charges in our consolidated statements
of income.

(Gain) Loss on Fair Value Remeasurement of 

Contingent Consideration

Collaboration profit (loss) sharing includes our 

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

The consideration for certain of our business 

We began to recognize revenues on sales of 

combinations includes future payments that are 
contingent upon the occurrence of a particular factor 
or factors. We record an obligation for such contingent 
consideration payments at fair value on the 
acquisition date. We then revalue our contingent 
consideration obligations each reporting period. 
Changes in the fair value of our contingent 
consideration obligations, other than changes due to
payments, are recognized as a (gain) loss on fair 
value remeasurement of contingent consideration in 
our consolidated statements of income. 

The loss on fair value remeasurement of 
contingent consideration for 2016 was primarily due
to changes in the probability of achieving certain 
developmental milestones and changes in the
discount rate.

65

biosimilars in the first quarter of 2016. For 2016 we
recognized net expense of $15.1 million related to 
our biosimilars commercial agreement with Samsung.

We began to recognize revenues on sales of 
ZINBRYTA in the E.U. in the third quarter of 2016. For 
2016 we also recognized income of $4.9 million to
reflect AbbVie's 50% share of net collaboration losses 
in the E.U. and Canada.

 For additional information related to these
arrangements, please read Note 19, Collaborative and
Other Relationships to our consolidated financial
statements included in this report.

TECFIDERA Litigation Settlement and License

For 2016 compared to 2015, the change in other 

income (expense), net was primarily due to an
increase in interest expense as a result of the
issuance of our senior unsecured notes in the third
quarter of 2015. This increase was partially offset by 
an increase in interest income on higher yields and
cash, cash equivalents and marketable securities
balances as well as a decrease in foreign exchange
losses recognized during the year ended December 
31, 2016, compared to the prior year comparative
period. 

For 2015 compared to 2014, the change in other 

income (expense), net was primarily due to an
increase in interest expense as a result of the
issuance of our senior unsecured notes in the third
quarter of 2015, higher foreign exchange losses and 
a decrease in net gains recognized on the sale of our 
strategic investments and marketable securities.

For additional information related to our senior 

unsecured notes, please read Note 11, Indebtedness, 
to our consolidated financial statements included in
this report.

Income Tax Provision

Charges

In January 2017 we agreed to enter into a 
settlement and license agreement with Forward
Pharma A/S (Forward Pharma) that will provide us an
irrevocable license to all intellectual property owned 
by Forward Pharma and results in the termination of 
the German Infringement Litigation. Under the terms
of the settlement and license agreement with Forward 
Pharma, we have 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 matter. This amount represents 
the fair value of estimated royalties on our sales of 
TECFIDERA during the period April 2014 through 
December 31, 2016. For additional information
related to the agreement, please read Note 21, 
Commitments and Contingencies to our consolidated 
financial statements included in this report.

Other Income (Expense), Net

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.

66

For additional information related to this
transaction, please read Note 19, Collaborative and
Other Relationships to our consolidated financial 
statements included in this report.

Noncontrolling Interest

For 2016 compared to 2015, the change in net
income (loss) attributable to noncontrolling interests,
net of tax, was primarily related to a $60.0 million
milestone payment made to Neurimmune SubOne AG
(Neurimmune) in 2015.

For 2015 compared to 2014, the change in net
income (loss) attributable to noncontrolling interests,
net of tax, was primarily related to a $60.0 million
milestone payment made to Neurimmune, partially 
offset by increases in research expenses attributable
to noncontrolling interests.

For additional information about Neurimmune,

please read Note 18, Investments in Variable Interest 
Entities to our consolidated financial statements
included in this report.

Our effective tax rate for 2016 compared to 

2015 increased primarily due to a net state tax 
benefit in 2015 of $27.0 million resulting from the 
remeasurement of one of our uncertain tax positions
and a higher relative percentage of our earnings being 
attributed to the U.S., a higher tax jurisdiction.

Our effective tax rate for 2015 compared to 

2014 benefited from lower anticipated taxes on 
foreign earnings and reflects a $27.0 million benefit 
from the 2015 remeasurement of one of our 
uncertain tax positions.

Accounting for Uncertainty in Income Taxes

For more information on our uncertain tax
positions and income tax rate reconciliation for 2016, 
2015 and 2014, please read Note 16, Income Taxes
to our consolidated financial statements included in
this report.

Equity in Loss of Investee, Net of Tax

In February 2012 we entered into an agreement 

with Samsung Biologics, establishing an entity,
Samsung Bioepis, to develop, manufacture and
market biosimilar pharmaceuticals. We account for 
this investment under the equity method of 
accounting. We recognize our share of the results of 
operations related to our investment in Samsung 
Bioepis one quarter in arrears. 

During 2015 our share of losses exceeded the 

carrying value of our investment. We therefore 
suspended recognizing additional losses and will 
continue to do so unless we commit to providing 
additional funding. 

For 2015 compared to 2014, the decrease in
our equity in loss of investee, net of tax, was due to
the suspension of equity method investment losses 
due to our share of losses exceeding the carrying 
value of our investment in 2015 and a decrease in 
our ownership interest.

67

Financial Condition, Liquidity and Capital Resources

Our financial condition is summarized as follows:

(In millions, except percentages)
Financial assets:

As of December 31,

2016

2015

% Change

2016 
compared to
2015

Cash and cash equivalents ....................................................... $
Marketable securities — current ...............................................
Marketable securities — non-current .........................................

Total cash, cash equivalents and marketable securities .......... $

2,326.5 $
2,568.6
2,829.4
7,724.5 $

1,308.0
2,120.5
2,760.4
6,188.9

Borrowings:

Current portion of notes payable and other financing
arrangements .......................................................................... $
Notes payable and other financing arrangements........................

Total borrowings................................................................... $

4.7 $

6,512.7
6,517.4 $

4.8
6,521.5
6,526.3

Working Capital:

Current assets ......................................................................... $
Current liabilities ......................................................................

Total working capital............................................................. $

8,732.2 $
(3,419.9)
5,312.3 $

6,700.3
(2,577.7)
4,122.6

77.9 %
21.1 %
2.5 %
24.8 %

(2.1)%
(0.1)%
(0.1)%

30.3 %
32.7 %
28.9 %

For the year ended December 31, 2016, certain 

For the year ended December 31, 2015, certain 

significant cash flows were as follows:

significant cash flows were as follows:

•  $4.5 billion in net cash flows provided by 

•  $3.7 billion in net cash flows provided by 

operating activities;

operating activities;

•  $1.0 billion used for share repurchases;

•  $5.9 billion in proceeds from the issuance of our 

•  $1.6 billion in total net payments for income

taxes;

•  $1.2 billion in contingent payments made to
former shareholders of Fumapharm AG and 
holders of their rights; and

•  $616.1 million used for purchases of property,

plant and equipment.

•  $102.0 million used for upfront and milestone
payments to Samsung Bioepis, AbbVie and 
UPenn; and

•  $75.0 million license fee payment made to Ionis.

senior unsecured notes;

•  $5.0 billion used for share repurchases;

•  $1.7 billion in total net payments for income

taxes;

•  $850.0 million in contingent payments made to 
former shareholders of Fumapharm AG and 
holders of their rights;

•  $643.0 million used for purchases of property, 

plant and equipment, including $104.8 million
related to the acquisition of Eisai's drug product 
manufacturing facility in Research Triangle Park 
(RTP), North Carolina and $62.5 million related
to the acquisition of land in Solothurn, 
Switzerland;

•  $198.8 million net cash paid for the acquisition

of Convergence; and

•

$244.0 million used for upfront and milestone
payments to AGTC, MTPC and Neurimmune.

68

In May 2015 our Board of Directors authorized a 

program to repurchase up to $5.0 billion of our 
common stock (2015 Share Repurchase Program), 
which was completed as of December 31, 2015. As
of December 31, 2015, we repurchased and retired 
approximately 16.8 million shares of common stock
at a cost of $5.0 billion under our 2015 Share
Repurchase Program.

In February 2011 our Board of Directors 

authorized a program to repurchase up to 20.0 million 
of our common stock (2011 Share Repurchase
Program), which has been used principally to offset
common stock issuances under our share-based
compensation plans. The 2011 Share Repurchase
Program does not have an expiration date. We did not
repurchase any shares of common stock under our 
2011 Share Repurchase Program during the years
ended December 31, 2016 and 2015. During the year 
ended December 31, 2014, we purchased
approximately 2.9 million shares of common stock at
a cost of $886.8 million under our 2011 Share
Repurchase Program. We have approximately 1.3
million shares remaining available for repurchase
under the 2011 Share Repurchase 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 increase in cash, cash equivalents and

marketable securities at December 31, 2016, from
December 31, 2015, is primarily due to net cash
flows provided by operating activities, partially offset
by purchases of our common stock, payments for 
income taxes, contingent payments made to former 
shareholders of Fumapharm AG and holders of their 
rights, the net purchases of property, plant and
equipment and upfront and milestone payments
related to our collaboration agreements.

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 December 31, 2016,
approximately $5.5 billion was generated in foreign 
jurisdictions and is primarily intended for use in our 
foreign operations or in connection with business
development transactions outside of 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

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.
Repurchased shares will be retired. During the year 
ended December 31, 2016, we repurchased and
retired 3.3 million shares of common stock at a cost
of $1.0 billion under our 2016 Share Repurchase
Program.

69

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, five-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 
December 31, 2016, we had no outstanding 
borrowings and were in compliance with all covenants
under this facility.

Cash Flows

The following table summarizes our cash flow activity:

In connection with our 2006 distribution
agreement with Fumedica AG (Fumedica), we issued
notes totaling 61.4 million Swiss Francs that were
payable to Fumedica in varying amounts from June
2008 through June 2018. Our remaining note payable 
to Fumedica had a carrying value of 6.2 million Swiss
Francs ($6.0 million) and 8.9 million Swiss Francs
($9.0 million) as of December 31, 2016 and 2015, 
respectively.

For a summary of the fair values of our 

outstanding borrowings as of December 31, 2016 and 
2015, please read Note 7, Fair Value Measurements
to our consolidated financial statements included in
this report.

Working Capital

We define working capital as current assets less

current liabilities. The increase in working capital at
December 31, 2016, from December 31, 2015,
reflects an increase in total current assets of 
$2,031.9 million, partially offset by an increase in
current liabilities of $842.2 million. The increase in
total current assets was primarily driven by an
increase in cash, cash equivalents and marketable
securities due to net cash flows provided by operating
activities. The increase in total current liabilities
primarily resulted from litigation settlement and
license charges and an increase in accrued
collaboration expenses.

(In millions, except percentages)
Net cash flows provided by operating
activities................................................ $
Net cash flows used in by investing
activities................................................ $
Net cash flows provided by (used in)
financing activities ................................. $

For the Years Ended
December 31,

2016

2015

2014

% Change

2016 
compared to 
2015

2015
compared to 
2014

4,522.4 $

3,716.1 $

2,942.1

21.7 %

26.3 %

(2,484.8) $

(4,553.6) $

(1,543.0)

(45.4)%

195.1 %

(987.8) $

986.4 $

(755.9)

(200.1)%

(230.5)%

Operating Activities

Operating cash flow is derived by adjusting our 

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.

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

70

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

For 2016 compared to 2015, the increase in 
cash provided by operating activities was primarily 
driven by higher net income, non-cash charges for 
depreciation and amortization, a comparative increase
in accrued expenses and other liabilities, partially 
offset by a comparative increase in accounts
receivable.

For 2015 compared to 2014, the increase in 
cash provided by operating activities was primarily 
driven by higher net income and accounts receivable 
collections, partially offset by income tax payments.

Investing Activities

For 2016 compared to 2015, the decrease in 

net cash flows used in investing activities was 
primarily due to a decrease in net purchases of 
marketable securities and cash paid for the
acquisition of Convergence in February 2015, partially 
offset by an increase in the contingent consideration 
related to the Fumapharm AG acquisition.

For 2015 compared to 2014, the increase in net

cash flows used in investing activities was primarily 
due to an increase in net purchases of marketable
securities, an increase in the total amount of 
contingent consideration paid to the former 
shareholders of Fumapharm AG, an increase in
purchases of property, plant and equipment and cash
paid for the acquisition of Convergence.

Financing Activities

For 2016 compared to 2015, the decrease in
net cash flows provided by financing activities was
primarily due to the issuance of our senior unsecured
notes issued in the third quarter of 2015, partially 
offset by a decrease in the purchases of common
stock.

For 2015 compared to 2014, the change in net 

cash flows provided by financing activities was
primarily due to the issuance of our 2015 Senior 
Notes, partially offset by an increase in the amount of 
common stock we repurchased.

Contractual Obligations and Off-Balance Sheet Arrangements

Contractual Obligations

The following table summarizes our contractual obligations as of December 31, 2016, 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.

(In millions)
Capital leases (1) .................................. $
Non-cancellable operating leases (2), (3) .
Long-term debt obligations (4) ................
Purchase and other obligations (5) ..........
Defined benefit obligation.......................

Payments Due by Period

Total

Less than
1 Year

1 to 3
Years

3 to 5
Years

After
5 Years

18.7 $

2.0 $

16.7 $

— $

549.5
10,281.1
1,740.1
74.5

66.4
282.5
1,598.2
—

108.2
1,055.1
88.5
—

98.4
1,939.7
43.9
—

—
276.5
7,003.8
9.5
74.5
7,364.3

Total contractual obligations ................. $ 12,663.9 $

1,949.1 $

1,268.5 $

2,082.0 $

PP

(1)  During 2015 we amended our existing lease
related to Eisai's oral solid dose products
manufacturing facility in RTP North Carolina,
where we manufacture our and Eisai's oral solid 
dose products. Amounts reflected within the 
table above include the future contractual 
commitments. For additional information, please
read Note 10, Property, Plant and Equipment tot
our consolidated financial statements included 
in this report.

(2)  We lease properties and equipment for use in 

our operations. Amounts reflected within the 
table above detail future minimum rental
commitments under non-cancelable operating
leases as of December 31 for each of the 
periods presented. In addition to the minimum 
rental commitments, these leases may require
us to pay additional amounts for taxes, 
insurance, maintenance and other operating
expenses. 

71

(3)  Obligations are presented net of sublease

income expected to be received for the vacated 
manufacturing facility in Cambridge, MA, the 
vacated portion of our Weston, Massachusetts 
facility and other facilities throughout the world. 
For additional information related to the 
sublease of the vacated manufacturing facility in
Cambridge, MA, please read Note 3,
Restructuring, Business Transformation and Other 
Cost Savings Initiatives to our consolidated
financial statements included in this report.

(4)  Long-term debt obligations are primarily related 
to our Senior Notes, including principal and
interest payments. 

(5)  Purchase and other obligations primarily includes
our obligations to purchase direct materials, our 
obligation of $1.25 billion under the litigation 
settlement and license agreement with Forward 
Pharma, $176.3 million in contractual 
commitments for the construction of a biologics 
manufacturing facility in Solothurn, Switzerland 
and $13.6 million related to the fair value of net 
liabilities on derivative contracts. For additional 
information on the litigation settlement and 
license agreement with Forward Pharma please
read Note 21, Commitments and Contingencies
to our consolidated financial statements
included in this report.

TYSABRI Contingent Payments

In 2013 we acquired from 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 consolidated statements of income.
Elan was acquired by Perrigo in December 2013. 
Following that acquisition, we began making these
royalty payments to Perrigo.

Contingent Consideration related to Business 

Combinations

In connection with our acquisitions of 

Convergence, Stromedix, Inc. (Stromedix) and Biogen
International Neuroscience GmbH (BIN), 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 

72

related to these acquisitions. For additional
information related to our acquisition of Convergence
please read Note 2, Acquisitions, to our consolidated
financial statements included in this report.

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 
twelve month period, as defined in the acquisition
agreement.

During 2016 we paid $1.2 billion in contingent

payments as we reached the $7.0 billion, $8.0 billion,
$9.0 billion and $10.0 billion cumulative sales levels
related to the Fumapharm Products in the fourth
quarter of 2015 and the first, second and third
quarters of 2016, respectively, and accrued $300.0
million upon reaching $11.0 billion in total cumulative
sales of Fumapharm Products in the fourth quarter of 
2016.

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 
shall 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 will be accounted for as
an increase to goodwill as incurred, in accordance
with the accounting standard applicable to business
combinations when we acquired Fumapharm. Any 
portion of the payment which 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 
December 31, 2016, we could make potential future
milestone payments to third parties of up to
approximately $3.1 billion, including approximately 
$0.5 billion in development milestones, approximately 
$0.8 billion in regulatory milestones and
approximately $1.8 billion in commercial milestones
as part of our various collaborations, including
licensing and development programs. Payments under 
these agreements generally become due and payable 

Critical Accounting Estimates

The preparation of our 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 on-going basis
we evaluate our estimates, judgments and 
methodologies. We base our estimates on historical 
experience and on various other assumptions that we
believe are reasonable, the results of which form the
basis for making judgments about the carrying values 
of assets, liabilities and equity and the amount of 
revenue and expenses. Actual results may differ from
these estimates under different assumptions or 
conditions.

Revenue Recognition and Related Allowances

We recognize revenue when all of the following

criteria are met: persuasive evidence of an 
arrangement exists; delivery has occurred or services
have been rendered; our price to the customer is fixed
or determinable; and collectability is reasonably 
assured. For additional information related to the new
accounting standard for revenues from contracts with
customers please read Note 1, Summary of 
Significant Accounting Policies: New Accounting 
Pronouncements to our consolidated financial
statements included in this report.

Product Revenues

Revenues from product sales are recognized

when title and risk of loss have passed to the 
customer, which is typically upon delivery. Product 
revenues are recorded net of applicable reserves for 
discounts and allowances. The timing of distributor 
orders and shipments can cause variability in
earnings.

upon achievement of certain development, regulatory 
or commercial milestones. Because the achievement
of these milestones had not occurred as of 
December 31, 2016, 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 successful achievement of certain 
development, regulatory approval and commercial
milestones.

We anticipate that we may pay approximately 

$157.0 million of milestone payments in 2017,
provided various development, regulatory or 
commercial milestones are achieved. 

Other Funding Commitments

As of December 31, 2016, we have several on-
going 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 have recorded accrued expenses of 
approximately $21.0 million on our consolidated 
balance sheet for expenditures incurred by CROs as 
of December 31, 2016. We have approximately 
$500.0 million in cancellable future commitments
based on existing CRO contracts as of December 31,
2016.

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 December 31, 2016, we have 
approximately $47.8 million of net 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.

Legal Matters

For a discussion of legal matters as of 
December 31, 2016, please read Note 20, Litigation
to our consolidated financial statements included in 
this report.

73

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 of the
international markets in which 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 could have an
effect on earnings in the period of adjustment.

In addition to the discounts and rebates
described above and classified as a reduction of 
revenue, we also maintain certain customer service
contracts with distributors and other customers in the 
distribution channel that provide us with inventory 
management, data and distribution services, which
are generally reflected as a reduction of revenue. To
the extent we can demonstrate a separable benefit
and fair value for these services, we classify these 
payments within selling, general and administrative 
expenses.

Revenues from Anti-CD20 Therapeutic Programs

Revenues from anti-CD20 therapeutic programs

consist of:

(i)   our share of pre-tax profits and losses in the 

U.S. for RITUXAN and GAZYVA;

(ii)  reimbursement of our selling and 

development expenses in the U.S. for 
RITUXAN; and

(iii)  revenues on sales in the rest of world for 

RITUXAN, which consist of our share of pre-
tax co-promotion profits on RITUXAN in 
Canada and royalty revenue on RITUXAN 
sales outside the U.S. and Canada by the 
Roche Group and its sublicensees.

Pre-tax co-promotion profits on RITUXAN and
GAZYVA are calculated and paid to us by Genentech in 
the U.S. Pre-tax co-promotion profits on RITUXAN are 
calculated and paid to us by the Roche Group in
Canada. Pre-tax co-promotion profits consist of U.S.
and Canadian net sales to third-party customers less
applicable costs to manufacture, third-party royalty 
expenses, distribution, selling and marketing
expenses, and joint development expenses incurred
by Genentech, the Roche Group and us. We record our 
share of the pre-tax co-promotion profits on RITUXAN
in Canada and royalty revenues on RITUXAN sales
outside the U.S. on a cash basis as we do not have
the ability to estimate these profits or royalty revenue
in the period incurred. Our share of the pre-tax profits
on RITUXAN and GAZYVA in the U.S. includes
estimates made by Genentech and those estimates
are subject to change. Actual results may differ from 
our estimates.

Concentrations of Credit Risk

The majority of our accounts receivable arise
from product sales in the U.S. and Europe and 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 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. Credit and economic
conditions in the E.U. continue to remain uncertain,
which has, from time to time, led to longer collection
periods for our accounts receivable and greater 
collection risk in certain countries.

 Where our collections continue to be subject to
significant payment delays due to government funding
and reimbursement practices and a portion of these
receivables are routinely being collected beyond our 
contractual payment terms and over periods in excess
of one year, we have discounted our receivables and
reduced related revenues based on the period of time
that we estimate those amounts will be paid, to the
extent such period exceeds one year, using the
country’s market-based borrowing rate for such
period. The related receivables are classified at the
time of sale as non-current assets.

To date, we have not experienced any significant

losses with respect to the collection of our accounts
receivable. If economic conditions worsen and/or the
financial condition of our customers were to further 
deteriorate, our risk of collectability may increase,
which may result in additional allowances and/or 
significant bad debts.

74

For additional information related to our 

concentration of credit risk associated with our 
accounts receivable balances, please read the 
subsection entitled “Credit Risk” in the “Quantitative
and Qualitative Disclosures About Market Risk” section 
of this report.

”

Collaborative and Other Relationships

Our development and commercialization
arrangements with Sobi and AbbVie represent
collaborative arrangements as each party is an active
participant and exposed to significant risks and
rewards of the arrangements. Where we are the
principal on sales transactions with third parties, we 
recognize revenue, cost of sales and sales and 
marketing expenses on a gross basis in their 
respective lines in our consolidated statements of 
income. Where we are not the principal on sales
transactions with third parties, we record our share of 
the revenues, cost of sales and sales and marketing
expenses on a net basis in collaborative and other 
relationships in our consolidated statements of 
income. 

For additional information related to our 

collaborations with Sobi and AbbVie, please read Note 
19, Collaborative and Other Relationships to these 
consolidated financial statements.

Capitalization of Inventory Costs

We capitalize inventory costs associated with 

our products prior to regulatory approval, when, based
on management’s judgment, future commercialization
is considered probable and the future economic 
benefit is expected to be realized. We consider 
numerous attributes in evaluating whether the costs 
to manufacture a particular product should be
capitalized as an asset. We assess the regulatory 
approval process and where the particular product
stands in relation to that approval process, including
any known safety or efficacy concerns, potential
labeling restrictions and other impediments to 
approval. We evaluate our anticipated research and 
development initiatives and constraints relating to the 
product and the indication in which it will be used. We
consider our manufacturing environment including our 
supply chain in determining logistical constraints that 
could hamper approval or commercialization. We
consider the shelf life of the product in relation to the
expected timeline for approval and we consider patent 
related or contract issues that may prevent or delay 
commercialization. We also base our judgment on the
viability of commercialization, trends in the 
marketplace and market acceptance criteria. Finally,
we consider the reimbursement strategies that may 
prevail with respect to the product and assess the 
economic benefit that we are likely to realize. We 
expense previously capitalized costs related to pre-
approval inventory upon a change in such judgment, 

75

due to, among other potential factors, a denial or 
significant delay of approval by necessary regulatory 
bodies. All changes in judgment in relation to pre-
approval inventory have historically been insignificant.

Acquired Intangible Assets, including In-process 

Research and Development (IPR&D)

Effective January 1, 2009, when we purchase a

business, the acquired IPR&D is measured at fair 
value, capitalized as an intangible asset and tested
for impairment at least annually, as of October 31,
until commercialization, after which time the IPR&D is
amortized over its estimated useful life. If we acquire
an asset or group of assets that do not meet the
definition of a business under applicable accounting
standards, the acquired IPR&D is expensed on its
acquisition date. Future costs to develop these
assets are recorded to research and development
expense as they are incurred.

We have acquired, and expect to continue to

acquire, intangible assets through the acquisition of 
biotechnology companies or through the consolidation
of variable interest entities. These intangible assets
primarily consist of technology associated with human
therapeutic products and IPR&D product candidates.
When significant identifiable intangible assets are 
acquired, we generally engage an independent third-
party valuation firm to assist in determining the fair 
values of these assets as of the acquisition date.
Management will determine the fair value of less
significant identifiable intangible assets acquired.
Discounted cash flow models are typically used in
these valuations, and these models require the use of 
significant estimates and assumptions including but 
not limited to:

•  estimating the timing of and expected costs to

complete the in-process projects;

•  projecting regulatory approvals;

•  estimating future cash flows from product sales
resulting from completed products and in 
process projects; and

•  developing appropriate discount rates and

probability rates by project.

We believe the fair values assigned to the 

intangible assets acquired are based upon
reasonable estimates and assumptions given
available facts and circumstances as of the
acquisition dates.

would significantly affect the anticipated lifetime
revenues of TYSABRI or AVONEX.

For additional information on the impairment 

charges related to our long-lived assets during 2016
and 2014, please read Note 6, Intangible Assets and
Goodwill to our consolidated financial statements
included in this report. Impairment charges related to
our long-lived assets during 2015 were insignificant.

Goodwill

Goodwill relates largely to amounts that arose in

connection with the merger of Biogen, Inc. and IDEC
Pharmaceuticals Corporation in 2003 and amounts
that are being paid in connection with the acquisition
of Fumapharm AG. Our goodwill balances represent
the difference between the purchase price and the fair 
value of the identifiable tangible and intangible net
assets when accounted for using the purchase
method of accounting.

We assess our goodwill balance within our 
single reporting unit annually, as of October 31, and 
whenever events or changes in circumstances
indicate the carrying value of goodwill may not be
recoverable to determine whether any impairment in
this asset may exist and, if so, the extent of such
impairment. We compare the fair value of our 
reporting unit to its carrying value. If the carrying
value of the net assets assigned to the reporting unit 
exceeds the fair value of our reporting unit, then we
would need to determine the implied fair value of our 
reporting unit’s goodwill. If the carrying value of our 
reporting unit’s goodwill exceeds its implied fair value,
then we would record an impairment loss equal to the
difference.

We completed our required annual impairment

test in the fourth quarters of 2016, 2015 and 2014, 
respectively, and determined in each of those periods
that the carrying value of goodwill was not impaired.
In each year, the fair value of our reporting unit, which
includes goodwill, was significantly in excess of the 
carrying value of our reporting unit.

If these projects are not successfully developed,

the sales and profitability of the company may be
adversely affected in future periods. Additionally, the
value of the acquired intangible assets may become
impaired. We believe that the foregoing assumptions
used in the IPR&D analysis were reasonable at the
time of the respective acquisition. No assurance can
be given that the underlying assumptions used to
estimate expected project sales, development costs
or profitability, or the events associated with such 
projects, will transpire as estimated.

Certain IPR&D programs have a fair value that is 

not significantly in excess of carrying value, including
our program for the treatment of TGN. Such programs 
could become impaired if assumptions used in
determining the fair value change.

Impairment and Amortization of Long-lived Assets 

and Accounting for Goodwill

Long-lived Assets Other than Goodwill

Long-lived assets to be held and used include 
property, plant and equipment as well as intangible
assets, including IPR&D and trademarks. Property,
plant and equipment are reviewed for impairment
whenever events or changes in circumstances
indicate that the carrying amount of the assets may 
not be recoverable. We review our intangible assets
with indefinite lives for impairment annually, as of 
October 31, and whenever events or changes in
circumstances indicate that the carrying value of an
asset may not be recoverable.

When performing our impairment assessment, 

we calculate the fair value using the same
methodology as described above under "Acquired 
Intangible Assets, including In-process Research and 
Development (IPR&D)". If the carrying value of our 
intangible assets with indefinite lives exceeds its fair 
value, then the intangible asset is written-down to its 
fair value. 

Our most significant intangible assets are our 

acquired and in-licensed rights and patents and 
developed technology. Acquired and in-licensed rights 
and patents primarily relates to our acquisition of all 
remaining rights to TYSABRI from Elan. 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. We amortize the intangible assets related to 
TYSABRI and AVONEX using the economic 
consumption method based on revenue generated 
from the products underlying the related intangible
assets. An analysis of the anticipated lifetime 
revenues of TYSABRI and AVONEX is performed
annually during our long range planning cycle, which is 
generally updated in the third quarter of each year,
and whenever events or changes in circumstances 

76

Investments, including Fair Value Measures and

Impairments

We invest in various types of securities, 
including short-term and long-term marketable 
securities, principally corporate notes, government 
securities including government sponsored enterprise
mortgage-backed securities and credit card and auto 
loan asset-backed securities, in which our excess
cash balances are invested.

In accordance with the accounting standard for 

fair value measurements, we have classified our 
financial assets as Level 1, 2 or 3 within the fair value
hierarchy. Fair values determined by Level 1 inputs 
utilize quoted prices (unadjusted) in active markets for 
identical assets that we have the ability to access. 
Fair values determined by Level 2 inputs utilize data 
points that are observable such as quoted prices,
interest rates, yield curves and foreign currency spot 
rates. Fair values determined by Level 3 inputs utilize 
unobservable data points for the asset.

As noted in Note 7, Fair Value Measurements to
our consolidated financial statements, a majority of 
our financial assets have been classified as Level 2.
These assets have been initially valued at the
transaction price and subsequently valued utilizing
third-party pricing services. The pricing services use 
many observable market inputs to determine value, 
including reportable trades, benchmark yields, credit
spreads, broker/dealer quotes, bids, offers, current
spot rates and other industry and economic events.
We validate the prices provided by our third-party 
pricing services by understanding the models used,
obtaining market values from other pricing sources 
and analyzing pricing data in certain instances.

Impairment

We conduct periodic reviews to identify and
evaluate each investment that has an unrealized loss,
in accordance with the meaning of other-than-
temporary impairment and its application to certain 
investments. An unrealized loss exists when the 
current fair value of an individual security is less than 
its amortized cost basis. Unrealized losses on 
available-for-sale debt securities that are determined
to be temporary, and not related to credit loss, are
recorded, net of tax, in accumulated other 
comprehensive income.

For available-for-sale debt securities with
unrealized losses, management performs an analysis
to assess whether we intend to sell or whether we
would more likely than not be required to sell the
security before the expected recovery of the
amortized cost basis. Where we intend to sell a
security, or may be required to do so, the security’s 
decline in fair value is deemed to be other-than-
temporary and the full amount of the unrealized loss
is reflected within earnings as an impairment loss.

Regardless of our intent to sell a security, we

perform additional analysis on all securities with
unrealized losses to evaluate losses associated with
the creditworthiness of the security. Credit losses are
identified where we do not expect to receive cash
flows sufficient to recover the amortized cost basis of 
a security and are reflected within earnings as an
impairment loss.

Share-Based Compensation

We make certain assumptions in order to value

and record expense associated with awards made
under our share-based compensation arrangements.
Changes in these assumptions may lead to variability 
with respect to the amount of expense we recognize
in connection with share-based payments.

Determining the appropriate valuation model and

related assumptions requires judgment, and includes
estimating the expected market price of our stock on
vesting date and stock price volatility as well as the
term of the expected awards. Determining the
appropriate amount to expense based on the
anticipated achievement of performance targets
requires judgment, including forecasting the
achievement of future financial targets. The estimate
of expense is revised periodically based on the
probability of achieving the required performance
targets and adjustments are made throughout the
term as appropriate. The cumulative impact of any 
revision is reflected in the period of change.

We also estimate forfeitures over the requisite

service period when recognizing share-based
compensation expense based on historical rates and
forward-looking factors. These estimates are adjusted
to the extent that actual forfeitures differ, or are
expected to materially differ, from our estimates.

77

Contingent Consideration

Income Taxes

For acquisitions completed before January 1,

2009, we record contingent consideration resulting 
from a business combination when the contingency is
resolved. For acquisitions completed after January 1,
2009, we record contingent consideration resulting 
from a business combination at its fair value on the 
acquisition date. Each reporting period thereafter, we
revalue these obligations and record increases or 
decreases in their fair value as an adjustment to
contingent consideration expense in our consolidated 
statements of income. Changes in the fair value of 
the contingent consideration obligations can result
from changes to one or multiple inputs including
adjustments to the discount rates and achievement
and timing of any cumulative sales-based and
development milestones, or changes in the probability 
of certain clinical events and changes in the assumed
probability associated with regulatory approval. These
fair value measurements represent Level 3 
measurements as they are based on significant
inputs not observable in the market.

Significant judgment is employed in determining
the appropriateness of these assumptions as of the
acquisition date and for each subsequent period. 
Accordingly, changes in assumptions described above, 
could have a material impact on the amount of 
contingent consideration expense we record in any 
given period.

Restructuring Charges

We have made estimates and judgments
regarding the amount and timing of our restructuring 
expense and liability, including current and future
period termination benefits, pipeline program
termination costs and other exit costs to be incurred 
when related actions take place. Severance and other 
related costs are reflected in our consolidated
statements of income as a component of total
restructuring charges incurred. Actual results may 
differ from these estimates.

We prepare and file income tax returns based on

our interpretation of each jurisdiction’s tax laws and
regulations. In preparing our consolidated financial
statements, we estimate our income tax liability in
each of the jurisdictions in which we operate by 
estimating our actual current tax expense together 
with assessing temporary differences resulting from
differing treatment of items for tax and financial
reporting purposes. These differences result in
deferred tax assets and liabilities, which are included
in our consolidated balance sheets. Significant
management judgment is required in assessing the 
realizability of our deferred tax assets. In performing
this assessment, we consider whether it is more likely 
than not that some portion or all of the deferred tax
assets will not be realized. The ultimate realization of 
deferred tax assets is dependent upon the generation
of future taxable income during the periods in which
those temporary differences become deductible. In
making this determination, under the applicable
financial accounting standards, we are allowed to
consider the scheduled reversal of deferred tax
liabilities, projected future taxable income and the
effects of tax planning strategies. Our estimates of 
future taxable income include, among other items, our 
estimates of future income tax deductions related to
the exercise of stock options. In the event that actual
results differ from our estimates, we adjust our 
estimates in future periods and we may need to
establish a valuation allowance, which could
materially impact our financial position and results of 
operations.

All tax effects associated with intercompany 
transfers of assets within our consolidated group,
both current and deferred, are recorded as a prepaid
tax or deferred charge and recognized through our 
consolidated statements of income when the asset
transferred is sold to a third-party or otherwise
recovered through amortization of the asset's
remaining economic life. If the asset transferred 
becomes impaired, for example through the
obsolescence of inventory or the discontinuation of a
research program, we will expense any remaining 
deferred charge or prepaid tax. As of December 31,
2016, total deferred charges and prepaid taxes were
$989.8 million. For additional information related to
the new accounting standard on tax effects
associated with intercompany transfers of assets
within our consolidated group please read Note 1,
Summary of Significant Accounting Policies: New 
Accounting Pronouncements to our consolidated
financial statements included in this report.

78

If we decide to repatriate funds in the future to

execute our growth initiatives or to fund any other 
liquidity needs, the resulting tax consequences would
negatively impact our results of operations through a
higher effective tax rate and dilution of our 
earnings. The residual U.S. tax liability, if cumulative
amounts were repatriated, would be between $1.8
billion to $2.3 billion as of December 31, 2016.

New Accounting Standards

For a discussion of new accounting standards

please read Note 1, Summary of Significant 
Accounting Principles to our consolidated financial
statements included in this report.

Item 7A.      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, 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 exchange
rates, primarily with respect to the Euro, British pound
sterling, Canadian dollar, Swiss franc, Danish krone 
and Japanese yen.

We account for uncertain tax positions using a
“more-likely-than-not” threshold for recognizing and
resolving uncertain tax positions. We evaluate 
uncertain tax positions on a quarterly basis and
consider various factors that include, but are not
limited to, changes in tax law, the measurement of tax 
positions taken or expected to be taken in tax returns,
the effective settlement of matters subject to audit, 
information obtained during in process audit activities 
and changes in facts or circumstances related to a
tax position. We adjust the level of the liability to 
reflect any subsequent changes in the relevant facts
surrounding the uncertain positions. Our liabilities for 
uncertain tax positions can be relieved only if the
contingency becomes legally extinguished, through 
either payment to the taxing authority or the expiration 
of the statute of limitations, the recognition of the 
benefits associated with the position meet the “more-
likely-than-not” threshold or the liability becomes 
effectively settled through the examination process. 
We consider matters to be effectively settled once the
taxing authority has completed all of its required or 
expected examination procedures, including all 
appeals and administrative reviews, we have no plans
to appeal or litigate any aspect of the tax position, 
and we believe that it is highly unlikely that the taxing 
authority would examine or re-examine the related tax
position. We also accrue for potential interest and
penalties related to unrecognized tax benefits in
income tax expense.

We earn a significant amount of our operating

income outside the U.S. As a result, a portion of our 
cash, cash equivalents and marketable securities are
held by foreign subsidiaries. We currently do not
intend or foresee a need to repatriate these funds.
We expect existing domestic cash, cash equivalents,
marketable securities and cash flows from operations
to continue to be sufficient to fund our domestic
operating activities and cash commitments for 
investing and financing activities for the foreseeable
future.

As of December 31, 2016, our non-U.S. 
subsidiaries’ undistributed foreign earnings included
in consolidated retained earnings and other basis 
differences aggregated to approximately $7.6 
billion. All undistributed foreign earnings of non-
U.S. subsidiaries, exclusive of earnings that would 
result in little or no net income tax expense or which 
were previously taxed under current U.S. tax law, are
reinvested indefinitely in operations outside the
U.S. This determination is made on a jurisdiction-by-
jurisdiction basis and takes into the account the
liquidity requirements in both the U.S. and within our 
foreign subsidiaries.  

79

While the financial results of our global activities 

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 consolidated statement of cash flows.

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 December 31,
2016 and 2015, 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 $172.0 million and
$185.0 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 the 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 December 31,
2016 and 2015, we estimate that such hypothetical
100 basis point adverse movement would result in a
hypothetical loss in fair value of approximately $50.0
million and $43.0 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.

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 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 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 exchange rates.

In June 2016 the U.K. voted in a referendum to
voluntarily depart from the E.U., known as Brexit. The 
macroeconomic impact on our results of operations
from this vote remains unknown. To date, the foreign 
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 9, Derivative
Instruments to our 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 consolidated statements of cash 
flows.

80

To achieve a desired mix of fixed and floating

Credit Risk

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 December 31, 2016 and 2015, a 100 basis-point
adverse movement (increase in LIBOR) would increase
annual interest expense by approximately $6.8 million 
in each case. 

Pricing Pressure

Governments in some international markets in 

which we operate have implemented measures aimed
at reducing healthcare costs to constrain 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.

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.

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, specialty 
pharmacies 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 December 31, 2016
and 2015. 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 8.     
Supplementary Data

Financial Statements and

The information required by this Item 8 is
contained on pages F-1 through F-75 of this report
and is incorporated herein by reference.

Changes in and Disagreements

Item 9.     
with Accountants on Accounting and 
Financial Disclosure

None.

81

Item 9A.      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 December 31, 2016. 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 
SEC’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.

U.S. GAAP. Our internal control over financial reporting
includes those policies and procedures that:

PP

•  pertain to the maintenance of records that, in 
reasonable detail, accurately and fairly reflect 
our transactions and dispositions of our assets;

•  provide reasonable assurance that transactions 
are recorded as necessary to permit preparation 
of financial statements in accordance with 
U.S. GAAP, and that our receipts and 
expenditures are being made only in accordance 
with authorizations of our management and 
directors; and

PP

•  provide reasonable assurance regarding 

prevention or timely detection of unauthorized 
acquisition, use or disposition of our assets that
could have a material effect on our financial 
statements.

Because of its inherent limitations, internal

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

Our management assessed the effectiveness of 

our internal control over financial reporting as of 
December 31, 2016. In making this assessment, 
management used the criteria set forth by the 
Committee of Sponsoring Organizations of the 
Treadway Commission (COSO) in its 2013 Internal
Control — Integrated Framework.

Changes in Internal Control over Financial Reporting

Based on our assessment, our management has 

concluded that, as of December 31, 2016, our 
internal control over financial reporting is effective
based on those criteria.

The effectiveness of our internal control over 

financial reporting as of December 31, 2016 has
been audited by PricewaterhouseCoopers LLP an 
independent registered public accounting firm, as
stated in their attestation report, which is included
herein.

PP

Item 9B.      Other Information

None.

There were no changes in our internal control 

over financial reporting during the quarter ended 
December 31, 2016 that have materially affected, or 
are reasonably likely to materially affect, our internal
control over financial reporting.

Management’s Annual Report on Internal Control 

over Financial Reporting

Our management is responsible for establishing

and maintaining adequate internal control over our 
financial reporting. Internal control over financial 
reporting is defined in Rules 13a-15(f) and 15d-15(f)
under the Securities Exchange Act as a process 
designed by, or under the supervision of, a company’s 
principal executive and principal financial officers and 
effected by a company’s board of directors, 
management and other personnel to provide 
reasonable assurance regarding the reliability of 
financial reporting and the preparation of financial 
statements for external purposes in accordance with 

82

PART III

Item 13.      Certain Relationships and
Related Transactions, and Director 
Independence

The response to this item is incorporated by 

reference from the discussion responsive thereto in
the sections entitled “Certain Relationships and
Related Person Transactions” and “Corporate
Governance at Biogen” contained in the proxy 
statement for our 2017 annual meeting of 
stockholders.

Item 14.      Principal Accounting Fees and
Services

The response to this item is incorporated by 

reference from the discussion responsive thereto in
the section entitled “Proposal 2 — Ratification of the 
Selection of our Independent Registered Public
Accounting Firm” contained in the proxy statement for 
our 2017 annual meeting of stockholders.

Item 10.      Directors, Executive Officers
and Corporate Governance

”

The information concerning our executive 
officers is set forth under the heading “Our Executive
Officers” in Part I of this report. The text of our code
of business conduct, which includes the code of 
ethics that applies to our principal executive officer, 
principal financial officer, principal accounting officer 
or controller, and persons performing similar 
functions, is posted on our website, www.biogen.com, 
under the “Corporate Governance” subsection of the 
“About Us” section of the site. We intend to make all
required disclosures regarding any amendments to, or 
waivers from, provisions of our code of business
conduct at the same location of our website. 

The response to the remainder of this item is

incorporated by reference from the discussion 
responsive thereto in the sections entitled 
“Proposal 1 - Election of Directors,” “Corporate
Governance at Biogen,” “Stock Ownership - Section 16
(a) Beneficial Ownership Reporting Compliance” and 
“Miscellaneous - Stockholder Proposals” contained in 
the proxy statement for our 2017 annual meeting of 
stockholders.

Item 11.      Executive Compensation

The response to this item is incorporated by 

reference from the discussion responsive thereto in 
the sections entitled “Executive Compensation
Matters” and “Corporate Governance at Biogen”
contained in the proxy statement for our 2017 annual 
meeting of stockholders.

Item 12.      Security Ownership of Certain
Beneficial Owners and Management and 
Related Stockholder Matters

The response to this item is incorporated by 

reference from the discussion responsive thereto in 
“Equity 
the sections entitled “Stock Ownership” and 
Compensation Plan Information” contained in the proxy 
statement for our 2017 annual meeting of 
stockholders.

”

”

83

PART IV

Item 15.  

Exhibits and Financial Statement Schedules

a.  

(1) Consolidated Financial Statements:

The following financial statements are filed as part of this report:

Financial Statements
Consolidated Statements of Income
Consolidated Statements of Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Equity
Notes to Consolidated Financial Statements
Report of Independent Registered Public Accounting Firm

Certain totals may not sum due to rounding.

(2) Financial Statement Schedules

Page Number

F-2
F-3
F-4
F-5
F-6
F-9
F-75

Schedules are omitted because they are not applicable, or are not required, or because the information is 

included in the consolidated financial statements and notes thereto.

(3) Exhibits

The exhibits listed on the Exhibit Index beginning on page A-1, which is incorporated herein by reference, are

filed or furnished as part of this report or are incorporated into this report by reference.

84

  
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has

duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

BIOGEN INC.

By:

/S/    MICHEL VOUNATSOS
Michel Vounatsos
Chief Executive Officer

Date: February 2, 2017 

85

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the 

following persons on behalf of the registrant and in the capacities and on the dates indicated.

Name

y
Capacity
p

Date

/S/    MICHEL VOUNATSOS
Michel Vounatsos

/S/    PAUL J. CLANCY
Paul J. Clancy

/S/    GREGORY F. COVINO

Gregory F. Covino

/S/    STELIOS PAPADOPOULOS
Stelios Papadopoulos

/S/    ALEXANDER J. DENNER
 Alexander J. Denner

/S/    CAROLINE D. DORSA
Caroline D. Dorsa

/S/    NANCY L. LEAMING
Nancy L. Leaming

/S/    RICHARD C. MULLIGAN
Richard C. Mulligan

/S/    ROBERT W. PANGIA
Robert W. Pangia

/S/    BRIAN S. POSNER
Brian S. Posner

/S/    ERIC K. ROWINSKY
Eric K. Rowinsky

/S/    LYNN SCHENK
Lynn Schenk

/S/    STEPHEN A. SHERWIN
Stephen A. Sherwin

Director and Chief Executive Officer
(principal executive officer)

February 2, 2017

Executive Vice President, Finance and
Chief Financial Officer (principal
financial officer)

February 2, 2017

Vice President, Finance, Chief
Accounting Officer (principal
accounting officer)

February 2, 2017

Director and Chairman of the Board of
Directors

February 2, 2017

Director

February 2, 2017

Director

February 2, 2017

Director

February 2, 2017

Director

February 2, 2017

Director

February 2, 2017

Director

February 2, 2017

Director

February 2, 2017

Director

February 2, 2017

Director

February 2, 2017

86

 
 
 
 
  
  
 
 
  
BIOGEN INC. AND SUBSIDIARIES
CONSOLIDATED FINANCIAL STATEMENTS

Consolidated Statements of Income
Consolidated Statements of Comprehensive Income
Consolidated Balance Sheets
Consolidated Statements of Cash Flows
Consolidated Statements of Equity
Notes to Consolidated Financial Statements
Report of Independent Registered Public Accounting Firm  

Page Number

F-2
F-3
F-4
F-5
F-6
F-9
F-75

F- 1

  
 
 
 
 
BIOGEN INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF INCOME
(In millions, except per share amounts)

For the Years Ended December 31,
2015

2014

2016

Revenues:

Product, net ........................................................................ $
Revenues from anti-CD20 therapeutic programs ....................
Other..................................................................................
Total revenues ................................................................

9,817.9 $
1,314.5
316.4
11,448.8

9,188.5 $
1,339.2
236.1
10,763.8

Cost and expenses:

Cost of sales, excluding amortization of acquired intangible
assets................................................................................

Research and development..................................................
Selling, general and administrative .......................................
Amortization of acquired intangible assets ............................
Restructuring charges..........................................................
Loss (gain) on fair value remeasurement of contingent
consideration ......................................................................
Collaboration profit (loss) sharing .........................................
TECFIDERA litigation settlement and license charges .............
Total cost and expenses ..................................................
Gain on sale of rights ............................................................
Income from operations .........................................................
Other income (expense), net ..................................................
Income before income tax expense and equity in loss of
investee, net of tax................................................................
Income tax expense ..............................................................
Equity in loss of investee, net of tax .......................................
Net income ...........................................................................
Net (loss) income attributable to noncontrolling interests, net
of tax ...................................................................................
Net income attributable to Biogen Inc. .................................... $
Net income per share:

1,478.7
1,973.3
1,947.9
385.6
33.1

14.8
10.2
454.8
6,298.4
—
5,150.4
(217.4)

4,933.0
1,237.3
—
3,695.7

1,240.4
2,012.8
2,113.1
382.6
93.4

30.5
—
—
5,872.8
—
4,891.0
(123.7)

4,767.3
1,161.6
12.5
3,593.2

(7.1)
3,702.8 $

46.2
3,547.0 $

Basic earnings per share attributable to Biogen Inc. .............. $
Diluted earnings per share attributable to Biogen Inc. ............ $

16.96 $
16.93 $

15.38 $
15.34 $

Weighted-average shares used in calculating:

Basic earnings per share attributable to Biogen Inc. ..............
Diluted earnings per share attributable to Biogen Inc. ............

218.4
218.8

230.7
231.2

8,203.4
1,195.4
304.5
9,703.3

1,171.0
1,893.4
2,232.3
489.8
—

(38.9)
—
—
5,747.7
16.8
3,972.4
(25.8)

3,946.6
989.9
15.1
2,941.6

6.8
2,934.8

12.42
12.37

236.4
237.2

See accompanying notes to these consolidated financial statements.

F- 2

BIOGEN INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(In millions)

Net income attributable to Biogen Inc. .................................... $
Other comprehensive income:

Unrealized gains (losses) on securities available for sale:

Unrealized gains (losses) recognized during the period, net
of tax ...............................................................................
Less: reclassification adjustment for (gains) losses included
in net income, net of tax ....................................................
Unrealized gains (losses) on securities available for sale,
net of tax........................................................................

Unrealized gains (losses) on cash flow hedges:

Unrealized gains (losses) recognized during the period, net
of tax ...............................................................................
Less: reclassification adjustment for (gains) losses included
in net income, net of tax ....................................................
Unrealized gains (losses) on cash flow hedges, net of tax ..
Unrealized gains (losses) on pension benefit obligation..........
Currency translation adjustment ...........................................
Total other comprehensive income (loss), net of tax.................
Comprehensive income attributable to Biogen Inc....................
Comprehensive income (loss) attributable to noncontrolling
interests, net of tax ...............................................................
Comprehensive income ......................................................... $

2016

2015

2014

3,702.8 $

3,547.0 $

2,934.8

(10.6)

0.6

(10.0)

(1.7)

1.3

(0.4)

0.4

(6.4)

(6.0)

51.6

110.8

101.7

(4.0)
47.6
5.1
(138.6)
(95.9)
3,606.9

(172.3)
(61.5)
(6.2)
(96.4)
(164.5)
3,382.5

(6.3)
95.4
(12.0)
(109.2)
(31.8)
2,903.0

(7.1)
3,599.8 $

46.2
3,428.7 $

6.8
2,909.8

See accompanying notes to these consolidated financial statements.

F- 3

BIOGEN INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(In millions, except per share amounts)

As of December 31,

2016

2015

ASSETS

Current assets:

Cash and cash equivalents ........................................................................ $
Marketable securities ................................................................................
Accounts receivable, net ............................................................................
Due from anti-CD20 therapeutic programs, net ............................................
Inventory ..................................................................................................
Other current assets .................................................................................
Total current assets...............................................................................
Marketable securities ..................................................................................
Property, plant and equipment, net ...............................................................
Intangible assets, net..................................................................................
Goodwill .....................................................................................................
Investments and other assets ......................................................................

2,326.5 $
2,568.6
1,441.6
300.6
1,001.6
1,093.3
8,732.2
2,829.4
2,501.8
3,808.3
3,669.3
1,335.8

Total assets.......................................................................................... $

22,876.8 $

LIABILITIES AND EQUITY

Current liabilities:

Current portion of notes payable and other financing arrangements .............. $
Taxes payable ...........................................................................................
Accounts payable ......................................................................................
Accrued expenses and other ......................................................................
Total current liabilities ...........................................................................
Notes payable and other financing arrangements...........................................
Deferred tax liability.....................................................................................
Other long-term liabilities .............................................................................
Total liabilities.......................................................................................

Commitments and contingencies
Equity:
Biogen Inc. shareholders’ equity

Preferred stock, par value $0.001 per share ...............................................
Common stock, par value $0.0005 per share..............................................
Additional paid-in capital ............................................................................
Accumulated other comprehensive loss ......................................................
Retained earnings .....................................................................................
Treasury stock, at cost; 22.6 million shares, respectively.............................
Total Biogen Inc. shareholders’ equity.....................................................
Noncontrolling interests ...............................................................................
Total equity...........................................................................................
Total liabilities and equity....................................................................... $

4.7 $

231.9
279.8
2,903.5
3,419.9
6,512.7
93.1
722.5
10,748.2

—
0.1
—
(319.9)
15,071.6
(2,611.7)
12,140.1
(11.5)
12,128.6
22,876.8 $

1,308.0
2,120.5
1,227.0
314.5
893.4
836.9
6,700.3
2,760.4
2,187.6
4,085.1
2,663.8
1,107.6
19,504.8

4.8
208.7
267.4
2,096.8
2,577.7
6,521.5
124.9
905.8
10,129.9

—
0.1
—
(224.0)
12,208.4
(2,611.7)
9,372.8
2.1
9,374.9
19,504.8

See accompanying notes to these consolidated financial statements.

F- 4

BIOGEN INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In millions)

Cash flows from operating activities:

Net income ...................................................................................... $
Adjustments to reconcile net income to net cash flows from operating
activities:

Depreciation and amortization .......................................................
Share-based compensation ...........................................................

Deferred income taxes ..................................................................

Other ...........................................................................................

Changes in operating assets and liabilities, net:

Accounts receivable ..................................................................
Due from anti-CD20 therapeutic programs ..................................
Inventory..................................................................................
Other assets ............................................................................
Accrued expenses and other current liabilities ............................
Income tax assets and liabilities................................................
Other liabilities .........................................................................
Net cash flows provided by operating activities .........................

Cash flows from investing activities:

Proceeds from sales and maturities of marketable securities...............
Purchases of marketable securities ...................................................
Contingent consideration related to Fumapharm AG acquisition............
Acquisitions of businesses, net of cash acquired ................................
Purchases of property, plant and equipment .......................................
Acquisitions of intangible assets .......................................................
Other ...............................................................................................
Net cash flows used in investing activities................................

Cash flows from financing activities:

For the Years Ended December 31,

2016

2015

2014

3,695.7 $

3,593.2 $

2,941.6

682.7

154.8

(175.0)
91.2

(241.4)

13.9
(165.6)
59.1
570.1
(232.6)
69.5
4,522.4

7,378.9
(7,913.2)
(1,200.0)
—
(616.1)
(111.6)
(22.8)
(2,484.8)

600.4

161.4

(145.6)
82.2

29.0

(31.1)
(174.4)
(127.0)
74.2
(429.4)
83.2
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4,063.0
(6,864.9)
(850.0)
(198.8)
(643.0)
(15.4)
(44.5)
(4,553.6)

688.1

155.3

(308.2)
(50.3)

(512.4)

(30.7)
(185.9)
(108.7)
244.3
40.3
68.7
2,942.1

2,718.9
(3,583.1)
(375.0)
—
(287.8)
(28.2)
12.2
(1,543.0)

Purchases of treasury stock ..............................................................

(1,000.0)

(5,000.0)

(886.8)

Proceeds from issuance of stock for share-based compensation
arrangements...................................................................................
Proceeds from borrowings .................................................................

Repayments of borrowings ................................................................
Excess tax benefit from share-based compensation ............................

Contingent consideration payments ...................................................
Other ...............................................................................................
Net cash flows provided by (used in) financing activities ............

Net increase in cash and cash equivalents ...........................................
Effect of exchange rate changes on cash and cash equivalents..............

Cash and cash equivalents, beginning of the year .................................
Cash and cash equivalents, end of the year.......................................... $

43.7
—

(2.7)

12.6
(38.6)

(2.8)

(987.8)

1,049.8

(31.3)

54.2
5,930.5

(2.1)

78.2
(13.1)

(61.3)

986.4

148.9

(45.8)

1,308.0

1,204.9

54.9

—
(2.7)

96.4
(20.5)

2.8

(755.9)

643.2

(40.9)

602.6

2,326.5 $

1,308.0 $

1,204.9

See accompanying notes to these consolidated financial statements.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

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, rare and autoimmune diseases.

Our marketed products include TECFIDERA, AVONEX, PLEGRIDY, TYSABRI, ZINBRYTA and FAMPYRA for multiple
sclerosis (MS), FUMADERM for the treatment of severe plaque psoriasis and SPINRAZA for the treatment of spinal 
muscular atrophy (SMA). 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, and other potential anti-CD20 therapies under a collaboration
agreement with Genentech, Inc. (Genentech), a wholly-owned member of the Roche Group (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 this agreement, we are currently 
manufacturing and commercializing BENEPALI, an etanercept biosimilar referencing ENBREL, and FLIXABI, an 
infliximab biosimilar referencing REMICADE, in the European Union (E.U.).

Hemophilia Spin-Off

In May 2016 we announced our intention to spin off our hemophilia business, Bioverativ Inc. (Bioverativ), as an 
independent, publicly traded company. 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. Bioverativ will also assume 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. (Sangamo).

On February 1, 2017, we completed the distribution of all the then outstanding shares of common stock of 

Bioverativ to Biogen stockholders, who received one share of Bioverativ common stock for every two shares of 
Biogen common stock. As a result of the distribution, Bioverativ is now an independent public company whose 
shares of common stock are trading under the symbol "BIVV" on the Nasdaq Global Select Market.

The financial results of Bioverativ are reflected in our consolidated results of operations and financial position 

included in these audited consolidated financial statements for the periods presented in this Form 10-K. The 
financial results of Bioverativ will be excluded from our consolidated results of operations and financial position 
commencing February 1, 2017. For additional information regarding the separation of Bioverativ, please read Note 
26, Subsequent Events to these consolidated financial statements.

Consolidation

Our 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 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) 
F- 9

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

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 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 on-going 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.

Revenue Recognition

We recognize revenue when all of the following criteria are met: persuasive evidence of an arrangement exists; 

delivery has occurred or services have been rendered; our price to the customer is fixed or determinable; and
collectability is reasonably assured.

Product Revenues

Revenues from product sales are recognized when title and risk of loss have passed to the customer, which is

typically upon delivery. 

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 of the international
markets in which 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 could have an effect on earnings in the period of 
adjustment.

Product revenue reserves are categorized as follows: discounts, contractual adjustments and returns.

Discounts include trade term discounts and wholesaler incentives. Trade term discounts and wholesaler 
incentives primarily relate to estimated obligations for credits to be granted to wholesalers for remitting payment on 
their purchases within established incentive periods and credits to be granted to wholesalers for compliance with
various contractually-defined inventory management practices, respectively. We determine these reserves based on 
our historical experience, including the timing of customer payments.

Contractual adjustments primarily relate to Medicaid and managed care rebates, co-payment (copay) 
assistance, Veterans Administration (VA) and Public Health Service (PHS) discounts, specialty pharmacy program 
fees and other governmental rebates or applicable allowances.

•  Medicaid rebates relate to our estimated obligations to states under established reimbursement arrangements.

Rebate accruals are recorded in the same period the related revenue is recognized, resulting in a reduction of 
product revenue and the establishment of a liability which is included in other current liabilities. Our liability for 
Medicaid rebates consists of estimates for claims that a state will make for the current quarter, claims for prior 
quarters that have been estimated for which an invoice has not been received, invoices received for claims from 
the prior quarters that have not been paid, and an estimate of potential claims that will be made for inventory 
that exists in the distribution channel at period end.

•  Governmental rebates or chargebacks, including VA and PHS discounts, represent our estimated obligations

resulting from contractual commitments to sell products to qualified healthcare providers at prices lower than 
the list prices we charge to wholesalers which provide those products. The wholesaler charges us for the 

F- 10

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

difference between what the wholesaler pays for the products and the ultimate selling price to the qualified
healthcare providers. Rebate and chargeback reserves are established in the same period as the related
revenue is recognized, resulting in a reduction in product revenue and accounts receivable. Chargeback 
amounts are generally determined at the time of resale to the qualified healthcare provider from the wholesaler,
and we generally issue credits for such amounts within a few weeks of the wholesaler notifying us about the 
resale. Our reserves for VA, PHS and chargebacks consist of amounts that we expect to issue for inventory that 
exists at the wholesalers that we expect will be sold to qualified healthcare providers and chargebacks that
wholesalers have claimed for which we have not issued a credit.

•  Managed care rebates represent our estimated obligations to third parties, primarily pharmacy benefit 

managers. Rebate accruals are recorded in the same period the related revenue is recognized, resulting in a 
reduction of product revenue and the establishment of a liability which is included in accrued expenses and 
other current liabilities. These rebates result from performance-based goals, formulary position and price 
increase limit allowances (price protection). The calculation of the accrual for these rebates is based on an 
estimate of the customer’s buying patterns and the resulting applicable contractual rebate rate(s) to be earned 
over a contractual period.

•  Copay assistance represents financial assistance to qualified patients, assisting them with prescription drug co-
payments required by insurance. The calculation of the accrual for copay is based on an estimate of claims and 
the cost per claim that we expect to receive associated with inventory that exists in the distribution channel at
period end.

•  Other governmental rebates or applicable allowances primarily relate to mandatory rebates and discounts in 

international markets where government-sponsored healthcare systems are the primary payors for healthcare.

Product returns are established for returns expected to be made by wholesalers and are recorded in the period 

the related revenue is recognized, resulting in a reduction to product sales. 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. Expired product return reserves are estimated through a
comparison of historical return data to their related sales on a production lot basis. Historical rates of return are 
determined for each product and are adjusted for known or expected changes in the marketplace specific to each
product.

In addition to the discounts, rebates and product returns described above and classified as a reduction of 

revenue, we also maintain certain customer service contracts with distributors and other customers in the 
distribution channel that provide us with inventory management, data and distribution services, which are generally 
reflected as a reduction of revenue. To the extent we can demonstrate a separable benefit and fair value for these 
services, we classify these payments in selling, general and administrative expenses.

Revenues from Anti-CD20 Therapeutic Programs

Revenues from anti-CD20 therapeutic programs consist of:

(i)   our share of pre-tax profits and losses in the U.S. for RITUXAN and GAZYVA; 

(ii)   reimbursement of our selling and development expenses in the U.S. for RITUXAN; and

(iii)  revenues on sales in the rest of world for RITUXAN, which consist of our share of pre-tax co-promotion

profits on RITUXAN in Canada and royalty revenue on RITUXAN sales outside the U.S. and Canada by the
Roche Group and its sublicensees.

Pre-tax co-promotion profits on RITUXAN and GAZYVA are calculated and paid to us by Genentech in the U.S. 

Pre-tax co-promotion profits on RITUXAN are calculated and paid to us by the Roche Group in Canada. Pre-tax co-
promotion profits consist of U.S. and Canadian net sales to third-party customers less applicable costs to 
manufacture, third-party royalty expenses, distribution, selling and marketing expenses, and joint development
expenses incurred by Genentech, the Roche Group and us. We record our share of the pre-tax co-promotion profits on
RITUXAN in Canada and royalty revenues on RITUXAN sales outside the U.S. on a cash basis as we do not have the
ability to estimate these profits or royalty revenue in the period incurred. Our share of the pre-tax profits on RITUXAN
and GAZYVA in the U.S. includes estimates made by Genentech and those estimates are subject to change. Actual 
results may differ from our estimates. For additional information related to our collaboration with Genentech, please
read Note 19, Collaborative and Other Relationships to these consolidated financial statements. 

F- 11

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Royalty Revenues

We receive royalty revenues on sales by our licensees of other products covered under patents that we own. We 

do not have future performance obligations under these license arrangements. We record these revenues based on 
estimates of the sales that occurred during the relevant period as a component of other revenues. The relevant
period estimates of sales are based on interim data provided by licensees and analysis of historical royalties that 
have been paid to us, adjusted for any changes in facts and circumstances, as appropriate. Differences between
actual and estimated royalty revenues are adjusted for in the period in which they become known, typically the 
following quarter. Historically, adjustments have not been material when compared to actual amounts paid by 
licensees. If we are unable to reasonably estimate royalty revenue or do not have access to the information, then we 
record royalty revenues on a cash basis. 

Multiple-Element Revenue Arrangements

We may enter into transactions that involve the sale of products and related services under multiple element 

arrangements. In accounting for these transactions, we assess the elements of the contract and whether each
element has standalone value and allocate revenue to the various elements based on their estimated selling price
as a component of total revenues. The selling price of a revenue generating element can be based on current selling 
prices offered by us or another party for current products or management’s best estimate of a selling price. Revenue
allocated to an individual element is recognized when all other revenue recognition criteria are met for that element.

Collaborative and Other Relationships

Our development and commercialization arrangements with Sobi and AbbVie Inc. (AbbVie) represent 

collaborative arrangements as each party is an active participant and exposed to significant risks and rewards of the
arrangements. Where we are the principal on sales transactions with third parties, we recognize revenue, cost of 
sales and operating expenses on a gross basis in their respective lines in our consolidated statements of income. 
Where we are not the principal on sales transactions with third parties, we record our share of the revenues, cost of 
sales and operating expenses on a net basis in collaborative and other relationships included in other revenue in our 
consolidated statements of income.

For additional information related to our collaborations with Sobi and AbbVie, please read Note 19, Collaborative

and Other Relationships, to these consolidated financial statements.

Fair Value Measurements

We have certain financial assets and liabilities recorded at fair value which have been classified as Level 1, 2 

or 3 within the fair value hierarchy as described in the accounting standards for fair value measurements.

•  Level 1 — Fair values are determined utilizing quoted prices (unadjusted) in active markets for identical assets 

or liabilities that we have the ability to access;

•  Level 2 — Fair values are determined by utilizing quoted prices for identical or similar assets and liabilities in

active markets or other market observable inputs such as interest rates, yield curves and foreign currency spot 
rates; and

•  Level 3 — Prices or valuations that require inputs that are both significant to the fair value measurement and

unobservable.

The majority of our financial assets have been classified as Level 2. Our financial assets (which include our 

cash equivalents, derivative contracts, marketable debt securities and plan assets for deferred compensation) have 
been initially valued at the transaction price and subsequently valued, at the end of each reporting period, utilizing
third-party pricing services or other market observable data. The pricing services utilize industry standard valuation 
models, including both income and market-based approaches and observable market inputs to determine value.
These observable market inputs include reportable trades, benchmark yields, credit spreads, broker/dealer quotes, 
bids, offers, current spot rates and other industry and economic events.

We validate the prices provided by our third-party pricing services by reviewing their pricing methods and 
matrices, obtaining market values from other pricing sources and analyzing pricing data in certain instances. After 
completing our validation procedures, we did not adjust or override any fair value measurements provided by our 
pricing services as of December 31, 2016 and 2015, respectively.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Other Assets and Liabilities

The carrying amounts reflected in the consolidated balance sheets for current accounts receivable, due from

anti-CD20 therapeutic programs, other current assets, accounts payable and accrued expenses and other,
approximate fair value due to their short-term maturities.

Cash and Cash Equivalents

We consider only those investments which are highly liquid, readily convertible to cash and that mature within 
three months from date of purchase to be cash equivalents. As of December 31, 2016 and 2015, cash equivalents
were comprised of money market funds and commercial paper, overnight reverse repurchase agreements and other 
debt securities with maturities less than 90 days from the date of purchase.

Accounts Receivable

The majority of our accounts receivable arise from product sales and primarily represent amounts due from our 

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 
provide reserves against trade receivables for estimated losses that may result from a customer’s inability to pay. 
Amounts determined to be uncollectible are charged or written-off against the reserve. To date, our historical
reserves and write-offs of accounts receivable have not been significant.

In countries where we have experienced a pattern of payments extending beyond our contractual payment term 
and we expect to collect receivables greater than one year from the time of sale, we have discounted our receivables 
and reduced related revenues over the period of time that we estimate those amounts will be paid using the
country’s market-based borrowing rate for such period. The related receivables are classified at the time of sale as
non-current assets. We accrete interest income on these receivables, which is recognized as a component of other 
income (expense), net in our consolidated statements of income.

Concentration of Credit Risk

Financial instruments that potentially subject us to concentrations of credit risk include cash and cash

equivalents, investments, derivatives and accounts receivable. We attempt to minimize the risks related to cash and
cash equivalents and investments by investing in a broad and diverse range of financial instruments as previously 
defined by us. We have established guidelines related to credit ratings and maturities intended to safeguard principal
balances and maintain liquidity. Our investment portfolio is maintained in accordance with our investment policy, 
which defines allowable investments, specifies credit quality standards and limits the credit exposure of any single
issuer. We minimize credit risk resulting from derivative instruments by choosing only highly rated financial
institutions as counterparties.

Concentrations of credit risk with respect to receivables, which are typically unsecured, are somewhat mitigated

due to the wide variety of customers and markets using our products, as well as their dispersion across many 
different geographic areas. The majority of our accounts receivable arise from product sales in the U.S. and Europe
and have standard payment terms which generally require payment within 30 to 90 days. 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 continue to monitor these conditions and assess their possible impact on our business.

As of December 31, 2016 and 2015, two wholesale distributors individually accounted for approximately 37.2%

and 19.2%, and 35.4% and 23.1%, of accounts receivable, net, respectively. 

Marketable Securities and Other Investments

Marketable Debt Securities

Available-for-sale debt securities are recorded at fair market value and unrealized gains and losses are included

in accumulated other comprehensive income (loss) in equity, net of related tax effects, unless the security has 
experienced a credit loss, we have determined that we have the intent to sell the security or we have determined that
it is more likely than not that we will have to sell the security before its expected recovery. Realized gains and losses 
are reported in other income (expense), net, on a specific identification basis.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Marketable Equity Securities

Our marketable equity securities represent investments in publicly traded equity securities and are included in 
investments and other assets in our consolidated balance sheet. When assessing whether a decline in the fair value
of a marketable equity security is other-than-temporary, we consider the fair market value of the security, the duration
of the security’s decline and prospects for the underlying business, including favorable or adverse clinical trial 
results, new product initiatives and new collaborative agreements with the companies in which we have invested.

Non-Marketable Equity Securities

We also invest in equity securities of companies whose securities are not publicly traded and where fair value 

is not readily available. These investments are recorded using either the cost method or the equity method of 
accounting, depending on our ownership percentage and other factors that suggest we have significant influence. We 
monitor these investments to evaluate whether any decline in their value has occurred that would be other-than-
temporary, based on the implied value of recent company financings, public market prices of comparable companies
and general market conditions and are included in investments and other assets in our consolidated balance sheet.

Evaluating Investments for Other-than-Temporary Impairments

We conduct periodic reviews to identify and evaluate each investment that has an unrealized loss, in
accordance with the meaning of other-than-temporary impairment and its application to certain investments. An
unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis. 
Unrealized losses on available-for-sale securities that are determined to be temporary, and not related to credit loss,
are recorded, net of tax, in accumulated other comprehensive income.

For available-for-sale debt securities with unrealized losses, management performs an analysis to assess

whether we intend to sell or whether we would more likely than not be required to sell the security before the 
expected recovery of the amortized cost basis. Where we intend to sell a security, or may be required to do so, the 
security’s decline in fair value is deemed to be other-than-temporary and the full amount of the unrealized loss is 
reflected in earnings as an impairment loss.

Regardless of our intent to sell a security, we perform additional analysis on all securities with unrealized
losses to evaluate losses associated with the creditworthiness of the security. Credit losses are identified where we 
do not expect to receive cash flows sufficient to recover the amortized cost basis of a security.

For equity securities, when assessing whether a decline in value is other-than-temporary, we consider the fair 
market value of the security, the duration of the security’s decline, and the financial condition of the issuer. We then
consider our intent and ability to hold the equity security for a period of time sufficient to recover our carrying value.
Where we have determined that we lack the intent and ability to hold an equity security to its expected recovery, the 
security’s decline in fair value is deemed to be other-than-temporary and is reflected in earnings as an impairment 
loss.

Equity Method of Accounting

In circumstances where we have the ability to exercise significant influence over the operating and financial 

policies of a company in which we have an investment, we utilize the equity method of accounting for recording
investment activity. In assessing whether we exercise significant influence, we consider the nature and magnitude of 
our investment, the voting and protective rights we hold, any participation in the governance of the other company,
and other relevant factors such as the presence of a collaboration or other business relationship. Under the equity 
method of accounting, we record in our results of operations our share of income or loss of the other company. If our 
share of losses exceeds the carrying value of our investment, we will suspend recognizing additional losses and will
continue to do so unless we commit to providing additional funding. 

Inventory

Inventories are stated at the lower of cost or market with cost based on the first-in, first-out (FIFO) method. We 

classify our inventory costs as long-term when we expect to utilize the inventory beyond our normal operating cycle 
and include these costs in investments and other assets in our consolidated balance sheets. Inventory that can be
used in either the production of clinical or commercial products is expensed as research and development costs
when identified for use in a clinical manufacturing campaign.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Capitalization of Inventory Costs

We capitalize inventory costs associated with our products prior to regulatory approval, when, based on
management’s judgment, future commercialization is considered probable and the future economic benefit is
expected to be realized. We consider numerous attributes in evaluating whether the costs to manufacture a 
particular product should be capitalized as an asset. We assess the regulatory approval process and where the 
particular product stands in relation to that approval process, including any known safety or efficacy concerns, 
potential labeling restrictions and other impediments to approval. We evaluate our anticipated research and
development initiatives and constraints relating to the product and the indication in which it will be used. We 
consider our manufacturing environment including our supply chain in determining logistical constraints that could
hamper approval or commercialization. We consider the shelf life of the product in relation to the expected timeline
for approval and we consider patent related or contract issues that may prevent or delay commercialization. We also
base our judgment on the viability of commercialization, trends in the marketplace and market acceptance criteria. 
Finally, we consider the reimbursement strategies that may prevail with respect to the product and assess the
economic benefit that we are likely to realize. We expense previously capitalized costs related to pre-approval
inventory upon a change in such judgment, due to, among other potential factors, a denial or significant delay of 
approval by necessary regulatory bodies.

Obsolescence and Unmarketable Inventory

We periodically review our inventories for excess or obsolescence and write-down obsolete or otherwise 

unmarketable inventory to its estimated net realizable value. If the actual net realizable value is less than that 
estimated by us, or if it is determined that inventory utilization will further diminish based on estimates of demand,
additional inventory write-downs may be required. Additionally, our products are subject to strict quality control and 
monitoring which we perform throughout the manufacturing process. In the event that certain batches or units of 
product no longer meet quality specifications, we will record a charge to cost of sales to write-down any 
unmarketable inventory to its estimated net realizable value. In all cases, product inventory is carried at the lower of 
cost or its estimated net realizable value. Amounts written-down due to unmarketable inventory are charged to cost
of sales.

Property, Plant and Equipment

Property, plant and equipment are carried at cost, subject to review for impairment whenever events or changes

in circumstances indicate that the carrying amount of the asset may not be recoverable. The cost of normal, 
recurring, or periodic repairs and maintenance activities related to property, plant and equipment are expensed as
incurred. The cost for planned major maintenance activities, including the related acquisition or construction of 
assets, is capitalized if the repair will result in future economic benefits.

Interest costs incurred during the construction of major capital projects are capitalized until the underlying
asset is ready for its intended use, at which point the interest costs are amortized as depreciation expense over the
life of the underlying asset. We also capitalize certain direct and incremental costs associated with the validation 
effort required for licensing by regulatory agencies of new manufacturing equipment for the production of a 
commercially approved drug. These costs primarily include direct labor and material and are incurred in preparing the
equipment for its intended use. The validation costs are either amortized over the life of the related equipment or 
expensed as cost of sales when the product produced in the validation process is sold.

In addition, we capitalize certain internal use computer software development costs. If the software is an 

integral part of production assets, these costs are included in machinery and equipment and are amortized on a
straight-line basis over the estimated useful lives of the related software, which generally range from three to five
years.

F- 15

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

We generally depreciate or amortize the cost of our property, plant and equipment using the straight-line 

method over the estimated useful lives of the respective assets, which are summarized as follows:

Asset Categoryg y
Land
Buildings
Leasehold Improvements
Furniture and Fixtures
Machinery and Equipment
Computer Software and Hardware

Useful Lives
Not depreciated
15 to 40 years
Lesser of the useful life or the term of the respective lease
5 to 7 years
5 to 20 years
3 to 5 years

When we dispose of property, plant and equipment, we remove the associated cost and accumulated 

depreciation from the related accounts on our consolidated balance sheet and include any resulting gain or loss in 
our consolidated statement of income.

Intangible Assets

Our intangible assets consist of acquired and in-licensed rights and patents, developed technology, out-licensed 

patents, in-process research and development acquired after January 1, 2009, trademarks and trade names. Our 
intangible assets are recorded at fair value at the time of their acquisition and are stated in our consolidated
balance sheets net of accumulated amortization and impairments, if applicable.

Intangible assets related to acquired and in-licensed rights and patents, developed technology and out-licensed
patents are amortized over their estimated useful lives using the economic consumption method if anticipated future 
revenues can be reasonably estimated. The straight-line method is used when revenues cannot be reasonably 
estimated. Amortization is recorded as amortization of acquired intangible assets in our consolidated statements of 
income.

Acquired and in-licensed rights and patents primarily relate to our acquisition of all remaining rights to TYSABRI 

from Elan Pharma International, Ltd (Elan), an affiliate of Elan Corporation, plc. 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. We amortize the intangible assets related to TYSABRI and AVONEX using the 
economic consumption method based on revenue generated from the products underlying the related intangible 
assets. An analysis of the anticipated lifetime revenues of TYSABRI and AVONEX is performed annually during our 
long range planning cycle, which is generally updated in the third quarter of each year, and whenever events or 
changes in circumstances would significantly affect the anticipated lifetime revenues of TYSABRI or AVONEX.

Intangible assets related to trademarks, trade names and in-process research and development prior to

commercialization are not amortized because they have indefinite lives; however, they are subject to review for 
impairment. We review our intangible assets with indefinite lives for impairment annually, as of October 31, and
whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable.

Acquired In-process Research and Development (IPR&D)

Acquired IPR&D represents the fair value assigned to research and development assets that have not reached
technological feasibility. The value assigned to acquired IPR&D is determined by estimating the costs to develop the 
acquired technology into commercially viable products, estimating the resulting revenue from the projects and
discounting the net cash flows to present value. The revenue and costs projections used to value acquired IPR&D
are, as applicable, reduced based on the probability of success of developing a new drug. Additionally, the
projections consider the relevant market sizes and growth factors, expected trends in technology and the nature and
expected timing of new product introductions by us and our competitors. The rates utilized to discount the net cash 
flows to their present value are commensurate with the stage of development of the projects and uncertainties in the 
economic estimates used in the projections. Upon the acquisition of IPR&D, we complete an assessment of whether 
our acquisition constitutes the purchase of a single asset or a group of assets. We consider multiple factors in this
assessment, including the nature of the technology acquired, the presence or absence of separate cash flows, the 
development process and stage of completion, quantitative significance and our rationale for entering into the 
transaction.

F- 16

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

If we acquire a business as defined under applicable accounting standards, then the acquired IPR&D is 

capitalized as an intangible asset. If we acquire an asset or group of assets that do not meet the definition of a
business, then the acquired IPR&D is expensed on its acquisition date. Future costs to develop these assets are
recorded to research and development expense as they are incurred.

When performing our impairment assessment, we calculate the fair value using the same methodology as
described above. If the carrying value of our acquired IPR&D exceeds its fair value, then the intangible asset is
written-down to its fair value. Certain IPR&D programs have a fair value that is not significantly in excess of carrying 
value, including our program for the treatment of trigeminal neuralgia (TGN). Such programs could become impaired if 
assumptions used in determining the fair value change.

Goodwill

Goodwill represents the difference between the purchase price and the fair value of the identifiable tangible

and intangible net assets when accounted for using the purchase method of accounting. Goodwill is not amortized, 
but reviewed for impairment. Goodwill is reviewed annually, as of October 31, and whenever events or changes in 
circumstances indicate that the carrying value of the goodwill might not be recoverable.

We compare the fair value of our reporting unit to its carrying value. If the carrying value of the net assets
assigned to the reporting unit exceeds the fair value of our reporting unit, then we would need to determine the
implied fair value of our reporting unit’s goodwill. If the carrying value of our reporting unit’s goodwill exceeds its 
implied fair value, then we would record an impairment loss equal to the difference. As described in Note 24,
Segment Information to these consolidated financial statements, we operate in one operating segment which we
consider our only reporting unit.

Impairment of Long-Lived Assets

Long-lived assets to be held and used, including property, plant and equipment and definite-lived intangible 
assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount 
of the assets or asset group may not be recoverable.

Determination of recoverability is based on an estimate of undiscounted future cash flows resulting from the 
use of the asset and its eventual disposition. In the event that such cash flows are not expected to be sufficient to
recover the carrying amount of the assets, the assets are written-down to their fair values. Long-lived assets to be
disposed of are carried at fair value less costs to sell.

Contingent Consideration

The consideration for our acquisitions often includes future payments that are contingent upon the occurrence

of a particular event. For acquisitions completed before January 1, 2009, we record contingent consideration 
resulting from a business combination when the contingency is resolved. For acquisitions that qualify as business 
combinations completed after January 1, 2009, we record an obligation for such contingent payments at fair value on
the acquisition date. We estimate the fair value of contingent consideration obligations through valuation models 
that incorporate probability-adjusted assumptions related to the achievement of the milestones and thus likelihood
of making related payments. We revalue these contingent consideration obligations each reporting period. Changes 
in the fair value of our contingent consideration obligations are recognized in our consolidated statements of income.
Changes in the fair value of the contingent consideration obligations can result from changes to one or multiple
inputs, including adjustments to the discount rates, changes in the amount or timing of expected expenditures
associated with product development, changes in the amount or timing of cash flows and reserves associated with 
products upon commercialization, changes in the assumed achievement or timing of any cumulative sales-based and 
development milestones, changes in the probability of certain clinical events and changes in the assumed probability 
associated with regulatory approval. 

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Discount rates in our valuation models represent a measure of the credit risk associated with settling the
liability. The period over which we discount our contingent obligations is based on the current development stage of 
the product candidates, our specific development plan for that product candidate adjusted for the probability of 
completing the development step, and when the contingent payments would be triggered. In estimating the 
probability of success, we utilize data regarding similar milestone events from several sources, including industry 
studies and our own experience. These fair value measurements are based on significant inputs not observable in
the market. Significant judgment is employed in determining the appropriateness of these assumptions as of the 
acquisition date and for each subsequent period. Accordingly, changes in assumptions could have a material impact 
on the amount of contingent consideration expense we record in any given period.

Derivative Instruments and Hedging Activities

We recognize all derivative instruments as either assets or liabilities at fair value in our consolidated balance
sheets. Changes in the fair value of derivatives are recorded each period in current earnings or accumulated other 
comprehensive income (loss), depending on whether a derivative is designated as part of a hedge transaction and, if 
so, the type of hedge transaction. We classify the cash flows from these instruments in the same category as the
cash flows from the hedged items. We do not hold or issue derivative instruments for trading or speculative
purposes.

We assess, both at inception and on an ongoing basis, whether the derivatives that are used in hedging
transactions are highly effective in offsetting the changes in cash flows or fair values of the hedged items. We also
assess hedge ineffectiveness on a quarterly basis and record the gain or loss related to the ineffective portion to 
current earnings. If we determine that a forecasted transaction is no longer probable of occurring, we discontinue
hedge accounting for the affected portion of the hedge instrument, and any related unrealized gain or loss on the 
contract is recognized in current earnings.

Translation of Foreign Currencies

The functional currency for most of our foreign subsidiaries is their local currency. For our non-U.S. subsidiaries 

that transact in a functional currency other than the U.S. dollar, assets and liabilities are translated at current rates
of exchange at the balance sheet date. Income and expense items are translated at the average foreign exchange
rates for the period. Adjustments resulting from the translation of the financial statements of our foreign operations
into U.S. dollars are excluded from the determination of net income and are recorded in accumulated other 
comprehensive income, a separate component of equity. For subsidiaries where the functional currency of the assets
and liabilities differ from the local currency, non-monetary assets and liabilities are translated at the rate of exchange 
in effect on the date assets were acquired while monetary assets and liabilities are translated at current rates of 
exchange as of the balance sheet date. Income and expense items are translated at the average foreign currency 
rates for the period. Translation adjustments of these subsidiaries are included in other income (expense), net, in our 
consolidated statements of income.

Royalty Cost of Sales

We make royalty payments to a number of third parties under license or purchase agreements associated with 
our acquisition of intellectual property. These royalty payments are typically calculated as a percentage (royalty rate) 
of the sales of our products in a particular year. That royalty rate may remain constant, increase or decrease within 
each year based on the total amount of sales during the annual period. Each quarterly period, we estimate our total
royalty obligation for the full year and recognize the proportional amount as cost of sales based on actual quarterly 
sales as a percentage of full year estimated sales. For example, if the level of net sales in any calendar year 
increases the royalty rate within the year, we will record our cost of sales at an even rate over the year, based on the 
estimated blended royalty rate. 

Accounting for Share-Based Compensation

Our share-based compensation programs grant awards that have included stock options, restricted stock units 

which vest based on stock performance known as market stock units (MSUs), performance-vested restricted stock
units which settle in cash (CSPUs), time-vested restricted stock units (RSUs), performance-vested restricted stock
units which can be settled in cash or shares of our common stock (PUs) at the sole discretion of the Compensation 
and Management Development Committee of the Board of Directors and shares issued under our employee stock 
purchase plan (ESPP). We charge the estimated fair value of awards against income over the requisite service period, 
which is generally the vesting period. Where awards are made with non-substantive vesting periods (for instance, 

F- 18

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

where a portion of the award vests upon retirement eligibility), we estimate and recognize expense based on the
period from the grant date to the date on which the employee is retirement eligible.

The fair values of our stock option grants are estimated as of the date of grant using a Black-Scholes option 

valuation model. The estimated fair values of the stock options are then expensed over the options’ vesting periods.

The fair values of our MSUs are estimated using a lattice model with a Monte Carlo simulation. We apply an

accelerated attribution method to recognize share-based compensation expense over the applicable service period,
net of estimated forfeitures, when accounting for our MSUs. The probability of actual shares expected to be earned
is considered in the grant date valuation, therefore the expense is not adjusted to reflect the actual units earned.

The fair values of our RSUs are based on the market value of our stock on the date of grant. Compensation 

expense for RSUs is recognized straight-line over the applicable service period.

We apply an accelerated attribution method to recognize share-based compensation expense when accounting 

for our CSPUs and PUs and the fair value of the liability is remeasured at the end of each reporting period through 
expected settlement. Compensation expense associated with CSPUs and PUs are based upon the stock price and 
the number of units expected to be earned after assessing the probability that certain performance criteria will be 
met and the associated targeted payout level that is forecasted will be achieved, net of estimated forfeitures.
Cumulative adjustments are recorded each quarter to reflect changes in the stock price and estimated outcome of 
the performance-related conditions until the date results are determined and settled.

The purchase price of common stock under our ESPP is equal to 85% of the lesser of (i) the fair market value

per share of the common stock on the first business day of an offering period and (ii) the fair market value per share
of the common stock on the purchase date. The fair value of the discounted purchases made under our ESPP is 
calculated using the Black-Scholes model. The fair value of the look-back provision plus the 15% discount is 
recognized as compensation expense over the 90 day purchase period. 

Research and Development Expenses

Research and development expenses consist of upfront fees and milestones paid to collaborators and 
expenses incurred in performing research and development activities, which include compensation and benefits, 
facilities and overhead expenses, clinical trial expenses and fees paid to contract research organizations (CROs), 
clinical supply and manufacturing expenses, write-offs of inventory that was previously capitalized in anticipation of 
product launch and determined to no longer be realizable, and other outside expenses. Research and development 
expenses are expensed as incurred. Payments we make for research and development services prior to the services
being rendered are recorded as prepaid assets on our consolidated balance sheets and are expensed as the
services are provided. We also accrue the costs of ongoing clinical trials associated with programs that have been 
terminated or discontinued for which there is no future economic benefit at the time the decision is made to
terminate or discontinue the program.

From time to time, we enter into development agreements in which we share expenses with a collaborative

partner. We record payments received from our collaborative partners for their share of the development costs as a
reduction of research and development expense, except as discussed in Note 19, Collaborative and Other 
Relationships to these consolidated financial statements. Because an initial indication has been approved for both 
RITUXAN and GAZYVA, expenses incurred by Genentech in the ongoing development of RITUXAN and GAZYVA are not 
recorded as research and development expense, but rather reduce our share of profits recorded as a component of 
revenues from anti-CD20 therapeutic programs.

For collaborations with commercialized products, if we are the principal, we record revenue and the 

corresponding operating costs in their respective line items in our consolidated statements of income. If we are not 
the principal, we record operating costs as a reduction of revenue.

Selling, General and Administrative Expenses

Selling, general and administrative expenses are primarily comprised of compensation and benefits associated

with sales and marketing, finance, human resources, legal, information technology and other administrative 
personnel, outside marketing, advertising and legal expenses and other general and administrative costs.

Advertising costs are expensed as incurred. For the years ended December 31, 2016, 2015 and 2014,

advertising costs totaled $106.3 million, $108.6 million and $92.9 million, respectively.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Income Taxes

The provision for income taxes includes federal, state, local and foreign taxes. Income taxes are accounted for 

under the liability method. Deferred tax assets and liabilities are recognized for the estimated future tax 
consequences of temporary differences between the financial statement carrying amounts and their respective tax
bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income 
in the year in which the temporary differences are expected to be recovered or settled. We evaluate the realizability 
of our deferred tax assets and establish a valuation allowance when it is more likely than not that all or a portion of 
deferred tax assets will not be realized.

All tax effects associated with intercompany transfers of assets in our consolidated group, both current and 
deferred, are recorded as a prepaid tax or deferred charge and recognized through the consolidated statement of 
income when the asset transferred is sold to a third party or otherwise recovered through amortization of the asset's 
remaining economic life. If the asset transferred becomes impaired, for example through the discontinuation of a
research program, we will expense any remaining deferred charge or prepaid tax.

We account for uncertain tax positions using a “more-likely-than-not” threshold for recognizing and resolving 

uncertain tax positions. We evaluate uncertain tax positions on a quarterly basis and consider various factors
including, but not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken in 
tax returns, the effective settlement of matters subject to audit, information obtained during in process audit 
activities and changes in facts or circumstances related to a tax position. We also accrue for potential interest and
penalties related to unrecognized tax benefits in income tax expense.

Contingencies

We are currently involved in various claims and legal proceedings. Loss contingency provisions are recorded if 

the potential loss from any claim, asserted or unasserted, or legal proceeding is considered probable and the 
amount can be reasonably estimated or a range of loss can be determined. These accruals represent management’s 
best estimate of probable loss. Disclosure also is provided when it is reasonably possible that a loss will be incurred
or when it is reasonably possible that the amount of a loss will exceed the recorded provision. On a quarterly basis,
we review the status of each significant matter and assess its potential financial exposure. Significant judgment is
required in both the determination of probability and the determination as to whether an exposure is reasonably 
estimable. Because of uncertainties related to these matters, accruals are based only on the best information 
available at the time. As additional information becomes available, we reassess the potential liability related to
pending claims and litigation and may change our estimates. These changes in the estimates of the potential 
liabilities could have a material impact on our consolidated results of operations and financial position.

Earnings per Share

Basic earnings per share is computed by dividing undistributed net income attributable to Biogen Inc. by the 

weighted-average number of common shares outstanding during the period.

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 the following amendments to ASU 2014-09 which have the same
effective date and transition date of January 1, 2018:

• 

In August 2015 the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): 
Deferral of the Effective Date, which delayed the effective date of the new standard from January 1, 2017 to
January 1, 2018. The FASB also agreed to allow entities to choose to adopt the standard as of the original 
effective date.

F- 20

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

• 

• 

• 

• 

In March 2016 the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606):
Principal versus Agent Considerations, which clarifies the implementation guidance on principal versus agent 
considerations. 

In April 2016 the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): 
Identifying Performance Obligations and Licensing, which clarifies certain aspects of identifying performance 
obligations and licensing implementation guidance. 

In May 2016 the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-
Scope Improvements and Practical Expedients related to disclosures of remaining performance obligations, as 
well as other amendments to guidance on collectability, non-cash consideration and the presentation of sales 
and other similar taxes collected from customers.

In December 2016 the FASB issued ASU No. 2016-20, Technical Corrections and Improvements to Topic 606,
Revenue from Contracts with Customers, which amends certain narrow aspects of the guidance issued in ASU
2014-09 including guidance related to the disclosure of remaining performance obligations and prior-period
performance obligations, as well as other amendments to the guidance on loan guarantee fees, contract costs, 
refund liabilities, advertising costs and the clarification of certain examples.

We are currently evaluating the method of adoption and the potential impact that Topic 606 may have on our 

financial position and results of operations.

In April 2015 the FASB issued ASU No. 2015-05, Intangibles - Goodwill and Other - Internal-Use Software 
(Subtopic 350-40): Customer's Accounting for Fees Paid in a Cloud Computing Arrangement. Under this standard, if a 
cloud computing arrangement includes a software license, the software license element of the arrangement should 
be accounted for consistent with the acquisition of other software licenses. If a cloud computing arrangement does
not include a software license, the arrangement should be accounted for as a service contract. We adopted this 
standard as of January 1, 2016, which did not have an impact on our financial position or results of operations.

In July 2015 the FASB issued ASU No. 2015-11, Inventory (Topic 330): Simplifying the Measurement of 
Inventory. The new standard applies only to inventory for which cost is determined by methods other than last-in, 
first-out and the retail inventory method, which includes inventory that is measured using first-in, first-out or average 
cost. Inventory within the scope of this standard is required to be measured at the lower of cost and net realizable 
value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably 
predictable costs of completion, disposal and transportation. We adopted this standard as of January 1, 2016, which 
did not have an impact on our financial position or results of operations.

In September 2015 the FASB issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the 

Accounting for Measurement-Period Adjustments. The new standard requires that an acquirer recognize adjustments
to provisional amounts that are identified during the measurement period in the reporting period in which the
adjustment amounts are determined and sets forth new disclosure requirements related to the adjustments. We 
adopted this standard as of January 1, 2016, which did not have an impact on our financial position or results of 
operations.

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. This 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
our results of operations. This 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. This 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.

F- 21

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

In February 2016 the FASB issued ASU No. 2016-02, Leases (Topic 842). This new standard requires that all

lessees recognize the assets and liabilities that arise from leases on the balance sheet and disclose qualitative and
quantitative information about its leasing arrangements. This new standard will be effective for us on January 1,
2019. The adoption of this standard is not expected to have a material impact on our net financial position, but will 
impact the amount of our assets and liabilities. We are currently evaluating the potential impact that this standard 
may have on our results of operations.

In March 2016 the FASB issued ASU No. 2016-06, Derivatives and Hedging (Topic 815): Contingent Put and

Call Options in Debt Instruments. This new standard simplifies the embedded derivative analysis for debt
instruments containing contingent call or put options by removing the requirement to assess whether a contingent
event is related to interest rates or credit risks. This new standard will be effective for us on January 1, 2017. The 
adoption of this standard is not expected to have an impact on our financial position or results of operations.

In March 2016 the FASB issued ASU No. 2016-07, Investments - Equity Method and Joint Ventures (Topic 323): 

Simplifying the Transition to the Equity Method of Accounting. This new standard eliminates the requirement that 
when an investment qualifies for use of the equity method as a result of an increase in the level of ownership
interest or degree of influence, an adjustment must be made to the investment, results of operations and retained 
earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods
that the investment has been held. This new standard will be effective for us on January 1, 2017. The adoption of 
this standard is not expected to have a material impact on our financial position or results of operations.

In March 2016 the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718):

Improvements to Employee Share-Based Payment Accounting. This new standard requires recognition of the income 
tax effects of vested or settled awards in the income statement and involves several other aspects of the accounting 
for share-based payment transactions, including the income tax consequences, classification of awards as either 
equity or liabilities and classification on the statement of cash flows. This new standard will be effective for us on
January 1, 2017. The adoption of this standard is not expected to have a material impact on our financial position,
results of operations or statements of cash flows upon adoption.

In June 2016 the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326):

Measurement of Credit Losses on Financial Instruments. This 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 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. This 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. This new standard clarifies certain aspects of the statement of cash
flows, including the classification of debt prepayment or debt extinguishment costs 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. This new standard also clarifies that an entity 
should determine each separately identifiable source of use within the cash receipts and 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. This 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 exception for an intra-entity transfer 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. We are currently evaluating the potential impact this 
standard may have on our financial position and results of operations.

F- 22

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

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.

2.      Acquisitions

Convergence Pharmaceuticals

On February 12, 2015, we completed our acquisition of all of the outstanding stock of Convergence
Pharmaceuticals (Convergence), a clinical-stage biopharmaceutical company with a focus on developing product 
candidates for neuropathic pain. Convergence’s lead candidate was a Phase 2 clinical candidate BIIB074
(CNV1014802), which had demonstrated clinical activity in proof-of-concept studies for TGN. Additionally, BIIB074
had potential applicability in several other neuropathic pain states, including lumbosacral radiculopathy and 
erythromelalgia.

The purchase price consisted of a $200.1 million cash payment at closing, plus contingent consideration in the

form of development and approval milestones up to a maximum of $450.0 million, of which $350.0 million was 
associated with the development and approval of BIIB074 for the treatment of TGN. The acquisition was funded from 
our existing cash on hand and was accounted for as the acquisition of a business. In addition to obtaining the rights 
to BIIB074 and additional product candidates in preclinical development, we retained the services of key employees
of Convergence. 

In connection with our acquisition of Convergence, we recorded a liability of $274.5 million representing the fair 

value of the contingent consideration. This amount was estimated through a valuation model that incorporated 
industry-based probability adjusted assumptions relating to the achievement of these milestones and thus the
likelihood of making the contingent payments. This fair value measurement was based upon significant inputs not 
observable in the market and therefore represented a Level 3 measurement. 

The purchase price, as adjusted, consisted of the following:

(In millions)
Cash portion of consideration ...................................................................................................... $
Contingent consideration .............................................................................................................

Total purchase price.................................................................................................................. $

200.1
274.5
474.6

During the second quarter of 2015 we adjusted our preliminary estimate of the fair value of the assets acquired 

and contingent consideration as of the date of acquisition as a result of finalizing the purchase price accounting.
This resulted in an increase in the value of our estimated contingent consideration and goodwill by $36.0 million, 
respectively. Our revised purchase price allocation is reflected in the chart below. Our purchase price allocation is 
complete.

Subsequent changes in the fair value of the contingent consideration obligation will be recognized as 
adjustments to contingent consideration and reflected in our consolidated statements of income. In the fourth
quarter of 2016 a $50.0 million milestone related to BIIB074 in an additional neuropathic pain indication was 
earned and paid, resulting in a reduction to the contingent consideration. For additional information related to the fair 
value of this obligation, please read Note 7, Fair Value Measurements to these consolidated financial statements.

F- 23

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The following table summarizes the estimated fair values of the separately identifiable assets acquired and 

liabilities assumed as of February 12, 2015, as adjusted:

(In millions)
In-process research and development........................................................................................... $
Other intangible assets ...............................................................................................................

Goodwill .....................................................................................................................................

Deferred tax liability ....................................................................................................................
Other, net...................................................................................................................................

Total purchase price.................................................................................................................. $

424.6

7.6
128.3

(84.9)

(1.0)
474.6

Our estimate of the fair value of the IPR&D programs acquired was determined through a probability adjusted

discounted cash flow analysis utilizing a discount rate of 11%. This valuation was primarily driven by the value 
associated with the lead candidate, BIIB074, which is in development for the treatment of TGN and was expected to
be completed no earlier than 2020, at a remaining cost of approximately $145.0 million. The fair value associated
with BIIB074 for the treatment of TGN was $200.0 million. We recorded additional IPR&D assets related to the use 
of BIIB074 in two additional neuropathic pain indications, with a total estimated value of $220.0 million. The 
remaining cost of development for these two indications was approximately $415.0 million, with an expected 
completion date of no earlier than 2021. These fair value measurements were based on significant inputs not 
observable in the market and thus represented Level 3 fair value measurements.

We attributed the goodwill recognized to the Convergence workforce's expertise in chronic pain research and 
clinical development and to establishing a deferred tax liability for the acquired IPR&D intangible assets which had
no tax basis. The goodwill was not tax deductible.

Pro forma results of operations would not be materially different as a result of the acquisition of Convergence

and therefore are not presented. Subsequent to the acquisition date, our results of operations include the results of 
operations of Convergence.

3.      Restructuring, Business Transformation and Other Cost Saving Initiatives

2015 Cost Saving Initiatives

2015 Restructuring Charges

On October 21, 2015, we announced a corporate restructuring, which included the termination of certain 
pipeline programs and an 11% reduction in workforce. Under this restructuring, cash payments were estimated to 
total approximately $120.0 million, of which $15.9 million were related to previously accrued 2015 incentive 
compensation, resulting in net restructuring charges totaling approximately $102.0 million. These amounts were
substantially paid by the end of 2016.

For the year ended December 31, 2016, we recognized total net restructuring charges of $8.0 million. We 

previously recognized $93.4 million of restructuring charges in our consolidated statements of income during the 
fourth quarter of 2015. Our restructuring reserve is included in accrued expenses and other in our consolidated 
balance sheets.

The following table summarizes the charges and spending related to our 2015 restructuring program during 

2016:

(In millions)
Restructuring reserve as of December 31, 2015 .................. $
Expense ............................................................................
Payments ..........................................................................
Adjustments to previous estimates, net ...............................
Restructuring reserve as of December 31, 2016 .................. $

Workforce
Reduction

Pipeline
Programs

Total

33.7 $
4.9
(31.2)
(5.2)
2.2 $

3.6 $
5.4
(9.0)
2.9
2.9 $

37.3
10.3
(40.2)
(2.3)
5.1

F- 24

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

2016 Organizational Changes and Cost Saving Initiatives

2016 Restructuring Charges

During the third quarter of 2016 we initiated cost saving measures primarily intended to realign our 
organizational structure due to the changes in roles and workforce resulting from our decision to spin off our 
hemophilia business, and to achieve further targeted cost reductions. For the year ended December 31, 2016, we 
recognized charges totaling $17.7 million related to this effort, which are in addition to, and separate from, the 2015 
corporate restructuring described above. These amounts, which were substantially incurred and paid by the end of 
2016, are primarily related to severance and are reflected in restructuring charges in our consolidated statements of 
income.

Cambridge, MA Manufacturing Facility

In June 2016 following an evaluation of our current and future manufacturing capabilities and capacity needs, 

we determined that we intend to vacate and cease manufacturing in our 67,000 square foot small-scale biologics
manufacturing facility in Cambridge, MA and also vacate our 46,000 square foot warehouse space in Somerville, MA.

In December 2016 we subleased our rights to the manufacturing facility in Cambridge, MA to Brammer Bio 

MA, LLC (Brammer). Brammer also purchased from us certain manufacturing equipment, leasehold improvements
and other assets in exchange for shares of Brammer common LLC interests and assumed manufacturing operations 
effective January 1, 2017. In December 2016 we also closed and vacated our warehouse space in Somerville, MA.

Our departure from these facilities shortened the expected useful lives of certain leasehold improvements and
other assets at these facilities. As a result, we recorded additional depreciation expense to reflect the assets' new
shorter useful lives. For the year ended December 31, 2016, we recognized approximately $45.5 million of this 
additional depreciation, which was recorded as cost of sales in our consolidated statements of income.

Under the terms of the agreement, Brammer will also provide manufacturing and other transition and support

services to us.

In the fourth quarter of 2016 we recognized charges totaling $7.4 million for severance costs related to certain 

employees separated from Biogen in connection with this transaction. These amounts will be substantially incurred 
and paid by the end of first quarter of 2017 and are reflected in restructuring charges in our consolidated
statements of income.

4.    Reserves for Discounts and Allowances

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

(In millions)
2016
Beginning balance ........................................... $

Current provisions relating to sales in current
year..............................................................
Adjustments relating to prior years..................
Payments/returns relating to sales in current
year..............................................................
Payments/returns relating to sales in prior
years ............................................................
Ending balance................................................ $

Discounts

Contractual
Adjustments

Returns

Total

56.1 $

548.7 $

57.9 $

662.7

592.6
(1.4)

2,044.5
1.5

30.9
(16.8)

2,668.0
(16.7)

(522.5)

(1,576.0)

(1.0)

(2,099.5)

(53.2)
71.6 $

(536.0)
482.7 $

(19.8)
51.2 $

(609.0)
605.5

F- 25

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

2015
Beginning balance............................................ $

Current provisions relating to sales in current
year ..............................................................
Adjustments relating to prior years ..................
Payments/returns relating to sales in current
year ..............................................................
Payments/returns relating to sales in prior
years ............................................................
Ending balance ................................................ $

2014
Beginning balance ........................................... $

Current provisions relating to sales in current
year..............................................................
Adjustments relating to prior years..................
Payments/returns relating to sales in current
year..............................................................
Payments/returns relating to sales in prior
years ............................................................
Ending balance................................................ $

Contractual
Adjustments

Returns

Total

47.6 $

387.1 $

49.1 $

483.8

459.7
(1.3)

1,732.1
(16.3)

37.6
(14.7)

2,229.4
(32.3)

(405.9)

(1,258.1)

(2.6)

(1,666.6)

(44.0)
56.1 $

(296.1)
548.7 $

(11.5)
57.9 $

(351.6)
662.7

Contractual
Adjustments

Returns

Total

47.0 $

345.5 $

33.7 $

426.2

347.3
(1.0)

1,265.4
(28.5)

39.1
13.5

1,651.8
(16.0)

(299.7)

(933.4)

(4.1)

(1,237.2)

(46.0)
47.6 $

(261.9)
387.1 $

(33.1)
49.1 $

(341.0)
483.8

The total revenue-related reserves above, included in our consolidated balance sheets, are summarized as

follows:

(In millions)
Reduction of accounts receivable ................................................................. $
Component of accrued expenses and other...................................................

Total revenue-related reserves.................................................................... $

As of December 31,

2016

2015

166.9 $
438.6
605.5 $

144.6
518.1
662.7

5.      Inventory

The components of inventory are summarized as follows:

(In millions)
Raw materials ............................................................................................. $
Work in process ..........................................................................................
Finished goods ...........................................................................................

Total inventory........................................................................................... $

Balance Sheet Classification:
Inventory .................................................................................................... $
Investments and other assets ......................................................................

Total inventory........................................................................................... $

As of December 31,

2016

2015

170.4 $
698.7
170.3
1,039.4 $

1,001.6 $
37.8
1,039.4 $

213.0
577.6
143.0
933.6

893.4
40.2
933.6

Long-term inventory, which primarily consists of work in process, is included in investments and other assets in 

our consolidated balance sheets.

F- 26

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

As of December 31, 2015, our inventory included $24.7 million associated with our ZINBRYTA program, $24.2 

million associated with our FLIXABI program and $18.4 million associated with our BENEPALI program, which had
been capitalized in advance of regulatory approval. The European Commission (EC) approved the marketing
authorization applications for BENEPALI and FLIXABI, two anti-tumor necrosis factor (TNF) biosimilars, for marketing in 
the E.U. in January 2016 and May 2016, respectively. In addition, ZINBRYTA 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. For information on our pre-approval 
inventory policy, please read Note 1, Summary of Significant Accounting Policies to these consolidated financial 
statements 

Inventory amounts written down as a result of excess, obsolescence, unmarketability or other reasons are 

charged to cost of sales, and totaled $48.2 million, $41.9 million and $50.6 million for the years ended 
December 31, 2016, 2015 and 2014, respectively.

6.     

Intangible Assets and Goodwill

Intangible Assets

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

follows:

(In millions)
Out-licensed patents ..
Developed technology.
In-process research
and development .......
Trademarks and trade
names.......................
Acquired and in-
licensed rights and
patents .....................
Total intangible
assets.................

Estimated Life

Cost

Accumulated
Amortization

Net

Cost

Accumulated
Amortization

As of December 31, 2016

As of December 31, 2015

13-23 years $ 543.3 $ (523.6) $
15-23 years
3,005.3
Indefinite until
commercialization

(2,634.3)

648.0

—

19.7 $ 543.3 $ (506.0) $

371.0

3,005.3

(2,552.9)

648.0

730.5

Indefinite

64.0

—

64.0

64.0

Net

37.3
452.4

730.5

64.0

—

—

6-18 years

3,481.7

(776.1)

2,705.6

3,303.2

(502.3)

2,800.9

$7,742.3 $ (3,934.0) $3,808.3 $7,646.3 $ (3,561.2) $4,085.1

Amortization of acquired intangible assets totaled $385.6 million, $382.6 million and $489.8 million for the
years ended December 31, 2016, 2015 and 2014, respectively. Amortization of acquired intangible assets during
2016 included impairment charges of $12.2 million related to two of our IPR&D intangible assets. Amortization of 
acquired intangible assets during 2014 included impairment charges of $34.7 million related to one of our out-
licensed patents and $16.2 million related to one of our IPR&D intangible assets. 

Out-licensed Patents

Out-licensed patents to third-parties primarily relate to patents acquired in connection with the merger of 

Biogen, Inc. and IDEC Pharmaceuticals Corporation in 2003. During 2014 we recorded a charge of $34.7 million 
related to the impairment of one of our out-licensed patents to reflect a change in its estimated fair value due to a 
change in the underlying competitive market for that product. The charge was included in amortization of acquired
intangible assets in our consolidated statements of income. The fair value of the intangible asset was based on a
discounted cash flow calculated using Level 3 fair value measurements and inputs including estimated revenues.
There were no impairment charges related to our out-licensed patents during 2016 or 2015.

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 
December 31, 2016, was $363.3 million.

F- 27

 
 
BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

IPR&D

IPR&D represents the fair value assigned to research and development assets that we acquire and have not 

reached technological feasibility at the date of acquisition. Upon commercialization, we will determine the estimated
useful life. In connection with our acquisition of Convergence in February 2015, we acquired IPR&D programs with an
estimated fair value of $424.6 million. This amount has and will be adjusted for foreign exchange rate fluctuations.
For a more detailed description of this transaction, please read Note 2, Acquisitions to these consolidated financial
statements.

An analysis of anticipated lifetime revenues and anticipated development costs is performed annually during 

our long- range planning cycle, which was updated in the third quarter of 2016. This analysis is based upon certain 
assumptions that we evaluate on a periodic basis, including anticipated future product sales, the expected impact of 
changes in the amount of development costs and the probabilities of our programs succeeding, the introduction of 
new products by our competitors and changes in our commercial and pipeline product candidates.   

During the fourth quarter of 2016 we terminated our collaboration agreements with Rodin Therapeutics, Inc. 

and Ataxion Inc., resulting in impairment losses of $8.7 million and $3.5 million, respectively, reflecting the full value
of the assets recorded upon entering into the collaboration agreements. These impairment losses are included in 
amortization of acquired intangible assets in our consolidated statements of income.

During the third quarter of 2014 we updated the probabilities of success related to the early stage programs
acquired through our recent acquisitions. The change in probability of success, combined with a delay in one of the
projects, resulted in an impairment loss of $16.2 million in one of our IPR&D assets during 2014. This impairment is
included in amortization of acquired intangible assets in our consolidated statements of income.

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 (Elan). The net book value of this asset as of December 31, 2016, was $2,493.2 million. 

The net change in acquired and in-licensed rights and patents during the year ended December 31, 2016,

reflects:

•  $60.0 million milestone payment due to Ionis Pharmaceuticals, Inc. (Ionis) for the approval of SPINRAZA in the 

U.S. in December 2016;

$50.0 million in total milestone payments due to Samsung Bioepis, which became payable upon the approval of 
BENEPALI and FLIXABI in the E.U. in January 2016 and May 2016, respectively;

•  $32.0 million in total milestone payments due to AbbVie, Inc. (AbbVie), which became payable upon the 

approval of ZINBRYTA in the U.S. in May 2016 and the E.U. in July 2016; and

•  $26.5 million upon the approval of ALPROLIX in the E.U. in May 2016 which is comprised of a $20.0 million
contingent payment due to the former owners of Syntonix Pharmaceuticals, Inc. (Syntonix) and $6.5 million
related to the establishment of a corresponding deferred tax liability.

For additional information on our relationships with Samsung Bioepis, AbbVie and Ionis, please read Note 19,

Collaborative and Other Relationships to these consolidated financial statements.

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 events or changes in circumstances would significantly affect the anticipated lifetime revenues of either 
product.

F- 28

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Our most recent long range planning cycle was completed in the third quarter of 2016. Based upon this

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

(In millions)

As of December 31, 2016

2017 ............................................................................................................................... $
2018 ...............................................................................................................................
2019 ...............................................................................................................................
2020 ...............................................................................................................................
2021 ...............................................................................................................................

334.8

312.7
295.2
259.7

242.8

Goodwill

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

(In millions)
Goodwill, beginning of year ........................................................................ $
Increase to goodwill ................................................................................
Other .....................................................................................................
Goodwill, end of year................................................................................. $

2016

2015

2,663.8 $
1,026.9
(21.4)
3,669.3 $

1,760.2
908.1
(4.5)
2,663.8

The increase in goodwill during 2016 was related to $1.2 billion in contingent milestones achieved (exclusive of 

$173.1 million in tax benefits) and payable to the former shareholders of Fumapharm AG or holders of their rights.
Other includes changes related to foreign exchange rate fluctuations. The increase in goodwill during 2015 was
related to $900.0 million in contingent milestones achieved (exclusive of $120.2 million in tax benefits) and payable 
to the former shareholders of Fumapharm AG or holders of their rights and $128.3 million related to our acquisition 
of Convergence.

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 these consolidated financial
statements. For additional information related to our acquisition of Convergence, please read Note 2, Acquisitions to
these consolidated financial statements.

As of December 31, 2016, we had no accumulated impairment losses related to goodwill.

F- 29

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

7.      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
December 31,
2016

Quoted
Prices in
Active
Markets
(Level 1)

Significant
Other
Observable
Inputs
(Level 2)

Significant
Unobservable
Inputs
(Level 3)

2,039.6 $

— $

2,039.6 $

(In millions)
Assets:

Cash equivalents ............................................. $
Marketable debt securities:

Corporate debt securities..............................
Government securities..................................
Mortgage and other asset backed securities ..
Marketable equity securities .............................
Derivative contracts..........................................
Plan assets for deferred compensation..............

Total........................................................ $

Liabilities:

2,663.8
2,172.5
561.7
24.9
61.0
34.5
7,558.0 $

Derivative contracts.......................................... $
Contingent consideration obligations .................

Total........................................................ $

13.6 $

467.6
481.2 $

13.6 $
—
13.6 $

—
467.6
467.6

As of
December 31,
2015

Quoted
Prices
in Active
Markets
(Level 1)

Significant
Other
Observable
Inputs
(Level 2)

Significant
Unobservable
Inputs
(Level 3)

909.5 $

— $

909.5 $

—

—
—
—
—
—
—
—

—

—
—
—
—
—
—
—

2,663.8
2,172.5
561.7
—
61.0
34.5
7,533.1 $

1,510.9
2,875.9
494.1
—
27.2
40.1
5,857.7 $

—
—
—
24.9
—
—
24.9 $

— $
—
— $

—
—
—
37.5
—
—
37.5 $

— $
—
— $

(In millions)
Assets:

Cash equivalents ............................................. $
Marketable debt securities:

Corporate debt securities..............................
Government securities..................................
Mortgage and other asset backed securities ..
Marketable equity securities .............................
Derivative contracts..........................................
Plan assets for deferred compensation..............

Total........................................................ $

Liabilities:

1,510.9
2,875.9
494.1
37.5
27.2
40.1
5,895.2 $

Derivative contracts.......................................... $
Contingent consideration obligations .................

Total........................................................ $

14.7 $

506.0
520.7 $

14.7 $
—
14.7 $

—
506.0
506.0

The fair value 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, refer to Note 1, Summary of Significant Accounting Policies: Fair Value
Measurements, to these consolidated financial statements.

F- 30

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Debt Instruments

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

(In millions)
Notes payable to Fumedica........................................................................ $
6.875% Senior Notes due March 1, 2018...................................................
2.900% Senior Notes due September 15, 2020..........................................
3.625% Senior Notes due September 15, 2022..........................................
4.050% Senior Notes due September 15, 2025..........................................
5.200% Senior Notes due September 15, 2045..........................................

Total ...................................................................................................... $

As of December 31,

2016

2015

6.1 $

583.7
1,521.5
1,026.6
1,796.0
1,874.5
6,808.4 $

9.4
602.6
1,497.5
1,014.2
1,764.6
1,757.6
6,645.9

The fair value of our notes payable to Fumedica 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 these consolidated financial statements.

Contingent Consideration Obligations

The following table provides a roll forward of the fair values of our contingent consideration obligations which 

includes Level 3 measurements:

(In millions)
Fair value, beginning of year....................................................................... $
Additions................................................................................................
Changes in fair value...............................................................................
Payments and other ................................................................................
Fair value, end of year ............................................................................... $

As of December 31,

2016

2015

506.0 $
—
14.8
(53.2)
467.6 $

215.5
274.5
30.5
(14.5)
506.0

As of December 31, 2016 and 2015, approximately $246.8 million and $301.3 million, respectively, of the fair 

value of our total contingent consideration obligations was reflected as a component of other long-term liabilities in 
our consolidated balance sheets with the remaining balance reflected as a component of accrued expenses and 
other. Payments and other for 2016 includes $7.9 million of a Convergence milestone converted to a short-term
obligation under the terms of the acquisition agreement.

There were no changes in valuation techniques or transfers between fair value measurement levels during the 

years ended December 31, 2016 and 2015. The fair values of the intangible assets and contingent consideration 
liabilities were based on a probability-adjusted discounted cash flow calculation using Level 3 fair value 
measurements and inputs including estimated revenues and probabilities of success. For additional information 
related to the valuation techniques and inputs utilized in valuation of our financial assets and liabilities, please read 
Note 1, Summary of Significant Accounting Policies to these consolidated financial statements.

Convergence

In connection with our acquisition of Convergence in February 2015 we recorded a contingent consideration 

obligation of $274.5 million. This valuation was based on probability weighted net cash outflow projections of 
$450.0 million, discounted using a rate of 2.0%, which was the estimated cost of debt financing for market
participants. This liability reflected the revised estimate from the date of acquisition for our initial clinical
development plans, resulting probabilities of success and the timing of certain milestone payments. For a more
detailed description of this transaction, please read Note 2, Acquisitions to these consolidated financial statements. 

As of December 31, 2016 and 2015, the fair value of this contingent consideration obligation was $258.9 
million and $297.5 million, respectively. Our most recent valuation was determined based upon probability weighted 
net cash flow projections of $400.0 million, discounted using a rate of 2.7%, which is a measure of the credit risk
associated with settling the liability. 

F- 31

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

For 2016 compared to 2015, the net decrease in the fair value of this obligation was primarily due to 

achievement of a $50.0 million milestone related to a second indication, partially offset by changes in the discount 
rate and an increase in the probability of success related to the achievement of certain developmental milestones. 
Approximately $148.4 million is reflected as a component of accrued expenses and other in our consolidated 
balance sheets as we expect to make the payment within one year.

Stromedix Inc.

In connection with our acquisition of Stromedix Inc. (Stromedix) in March 2012 we recorded a contingent 

consideration obligation of $122.2 million. As of December 31, 2016 and 2015, the fair value of this contingent
consideration obligation was $133.2 million and $131.5 million, respectively. Our most recent valuation was 
determined based upon probability weighted net cash outflow projections of $419.0 million, discounted using a rate 
of 2.2%, which is a measure of the credit risk associated with settling the liability. 

For 2016 compared to 2015, the net increase in the fair value of this obligation was primarily due to changes 

in the discount rate, partially offset by changes in the expected timing related to the achievement of certain
remaining developmental milestones. Approximately $56.9 million is reflected as a component of accrued expenses
and other in our consolidated balance sheets as we expect to make the payment within one year.

Biogen Idec International Neuroscience GmbH

In connection with our acquisition of Biogen Idec International Neuroscience GmbH (BIN), formerly Panima 
Pharmaceuticals AG (Panima), in December 2010 we recorded a contingent consideration obligation of $81.2 million. 
As of December 31, 2016 and 2015, the fair value of this contingent consideration obligation was $75.5 million and
$77.0 million, respectively. Our most recent valuation was determined based upon probability weighted net cash
outflow projections of $361.7 million, discounted using a rate of 2.7%, which is a measure of the credit risk 
associated with settling the liability.

For 2016 compared to 2015, the net decrease in the fair value of this obligation was primarily due to payment

of $3.3 million in developmental milestones, partially offset by changes in the discount rate. Approximately $15.5 
million is reflected as a component of accrued expenses and other in our consolidated balance sheets as we expect 
to make the payment within one year.

Acquired IPR&D

In connection with our acquisition of Convergence, we also allocated $424.6 million of the total purchase price 
to acquired IPR&D, which was capitalized as an intangible asset. The amount allocated to acquired IPR&D was based 
on significant inputs not observable in the market and thus represented a Level 3 fair value measurement. This 
estimate was also adjusted from our preliminary estimate as of the date of acquisition to reflect revised estimates 
to our initial clinical development plans, resulting probabilities of success and the timing of certain milestone
payments. These assets will be tested for impairment annually until commercialization, after which time the IPR&D
will be amortized over its estimated useful life. For a more detailed description of this transaction, please read Note 
2, Acquisitions to these consolidated financial statements.

8.    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 consolidated balance sheet:

(In millions)
Commercial paper ...................................................................................... $
Overnight reverse repurchase agreements ....................................................
Money market funds ...................................................................................
Short-term debt securities ...........................................................................

Total........................................................................................................ $

As of December 31,

2016

2015

31.0 $
—
741.7
1,266.9
2,039.6 $

21.9
134.7
673.8
79.1
909.5

F- 32

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The carrying values of our commercial paper, including accrued interest, overnight reverse repurchase 
agreements, money market funds and our short-term debt securities approximate fair value due to their short term
maturities. Our overnight reverse repurchase agreements were collateralized with agency-guaranteed mortgage-
backed securities and represented approximately 0.7% of total assets as of December 31, 2015.

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

As of December 31, 2016 (In millions)
Corporate debt securities

Fair
Value

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Amortized
Cost

Current ...................................................... $
Non-current ................................................

1,408.6 $
1,255.2

Government securities

Current ......................................................
Non-current ................................................

1,156.0
1,016.5

Mortgage and other asset backed securities

Current ......................................................
Non-current ................................................

Total marketable debt securities ................ $
Marketable equity securities, non-current........ $

4.0
557.7
5,398.0 $
24.9 $

0.2 $
1.2

0.2
0.5

—
0.8
2.9 $
0.7 $

(0.6) $
(4.7)

1,409.0
1,258.7

(0.3)
(3.4)

—
(2.2)
(11.2) $
(9.3) $

1,156.1
1,019.4

4.0
559.1
5,406.3
33.5

As of December 31, 2015 (In millions)
Corporate debt securities

Fair
Value

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Amortized
Cost

Current ........................................................ $
Non-current..................................................

394.3 $

1,116.6

Government securities

Current ........................................................
Non-current..................................................

1,723.4
1,152.5

Mortgage and other asset backed securities

Current ........................................................
Non-current..................................................

Total marketable debt securities................ $
Marketable equity securities, non-current ......... $

2.8
491.3
4,880.9 $
37.5 $

Summary of Contractual Maturities: Available-for-Sale Securities

— $
0.1

0.1
—

—
0.1
0.3 $
9.2 $

(0.5) $
(4.1)

394.8
1,120.6

(1.1)
(3.1)

—
(1.8)
(10.6) $
— $

1,724.4
1,155.6

2.8
493.0
4,891.2
28.3

The estimated fair value and amortized cost of our marketable debt securities available-for-sale by contractual 

maturity are summarized as follows:

(In millions)
Due in one year or less................................... $
Due after one year through five years...............
Due after five years ........................................

Total available-for-sale securities................... $

As of December 31, 2016

As of December 31, 2015

Estimated
Fair  Value

2,568.6 $
2,552.6
276.8
5,398.0 $

Amortized
Cost
2,569.1 $
2,559.7
277.5
5,406.3 $

Estimated
Fair  Value

2,120.5 $
2,575.9
184.5
4,880.9 $

Amortized
Cost
2,122.0
2,583.9
185.3
4,891.2

The average maturity of our marketable debt securities available-for-sale as of December 31, 2016 and 2015 

was 12 months and 16 months, respectively.

F- 33

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (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:

(In millions)
Proceeds from maturities and sales..................................... $
Realized gains ................................................................... $
Realized losses.................................................................. $

For the Years Ended December 31,

2016

2015

2014

7,378.9 $
3.3 $
4.3 $

4,063.0 $
1.5 $
3.5 $

2,718.9
0.7
0.5

Realized losses for the year ended December 31, 2016, primarily relate to sales of corporate bonds, agency 

mortgage-backed securities and other asset-backed securities. Realized losses for the year ended December 31,
2015, primarily relate to sales of corporate bonds, agency mortgage-backed securities and other asset-backed 
securities. Realized losses for the year ended December 31, 2014, primarily relate to sales of agency mortgage-
backed securities and government securities.

Strategic Investments

As of December 31, 2016 and 2015, our strategic investment portfolio was comprised of investments totaling

$99.9 million and $96.0 million, respectively, which are included in investments and other assets in our 
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. 

9. 

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 December 31, 2016 and 2015, had durations of 1 to 18 
months, respectively. 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, beginning in the fourth quarter of 2015, 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:

Foreign Currency: (In millions)
Euro .......................................................................................................... $
Swiss francs ..............................................................................................
Canadian dollar ..........................................................................................

Total foreign currency forward contracts...................................................... $

Notional Amount
As of December 31,

2016

2015

871.7 $
—
—
871.7 $

945.5
80.8
76.7
1,103.0

F- 34

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

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 $49.8 million, $1.8 million and $72.1 million for 
the years ended December 31, 2016, 2015 and 2014, respectively. We expect all contracts 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 
December 31, 2016 and 2015, credit risk did not change the fair value of our foreign currency forward contracts.

The following table summarizes the effect of foreign currency forward contracts designated as hedging 

instruments on our consolidated statements of income:

For the Years Ended December 31,

Net Gains/(Losses)
Reclassified from AOCI into Net Income
(Effective Portion)

Location

2016

2015

2014

Revenue ...... $

5.3 $

173.2 $

6.8

Operating
expenses..... $

(1.5) $

— $

—

Interest Rate Contracts - Hedging Instruments

Net Gains/(Losses)
Recognized into Net Income
(Ineffective Portion)

2016

2015

2014

2.9 $

4.9 $

(1.5)

0.1 $

— $

—

Location
Other
income
(expense) .... $
Other
income
(expense) .... $

We have entered into interest rate lock contracts or interest rate swap contracts on certain borrowing
transactions to manage our exposure to interest rate changes and to reduce our overall cost of borrowing. 

Interest Rate Lock Contracts

During 2015 we entered into treasury rate locks, with an aggregated notional amount of $1.1 billion, which 
were designated as cash flow hedges to hedge against changes in the 10-year and 30-year U.S. treasury interest
rates that could have impacted our anticipated debt offering. In connection with the issuance of our 4.05% and
5.20% Senior Notes, as described in Note 11, Indebtedness, we settled the treasury rate locks and realized an $8.5
million gain. As the hedging relationship was effective, the gain was recorded in AOCI and will be recognized in other 
income (expense), net over the life of the 4.05% and 5.20% Senior Notes.

Interest Rate Swap Contracts

In connection with the issuance of our 2.90% Senior Notes, as described in Note 11, Indebtedness, 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 the 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 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 $902.1 million and $721.0

million as of December 31, 2016 and 2015, respectively. Net losses of $29.2 million, $23.8 million and $15.5
million related to these contracts were recognized as a component of other income (expense), net, for the years 
ended December 31, 2016, 2015 and 2014, respectively.

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 consolidated balance sheets.

F- 35

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The following table summarizes the fair value and presentation in our consolidated balance sheets of our 

outstanding derivatives including those designated as hedging instruments:

(In millions)
Hedging Instruments:

Balance Sheet Location

Fair Value
As of December 31, 2016

Asset derivatives ....................................... Other current assets .................................... $
Investments and other assets ...................... $
Liability derivatives .................................... Other long-term liabilities ............................. $

Other Derivatives:

Asset derivatives ....................................... Other current assets .................................... $
Liability derivatives .................................... Accrued expenses and other ........................ $

50.4
6.6
4.6

4.0
9.0

(In millions)
Hedging Instruments:

Balance Sheet Location

Fair Value
As of December 31, 2015

Asset derivatives ....................................... Other current assets .................................... $
Investments and other assets ...................... $
Liability derivatives .................................... Accrued expenses and other ........................ $
Other long-term liabilities ............................. $

Other Derivatives:

Asset derivatives ....................................... Other current assets .................................... $
Liability derivatives .................................... Accrued expenses and other ........................ $

16.6
0.3
10.2
2.5

10.3
2.0

10.    Property, Plant and Equipment

Property, plant and equipment are recorded at historical cost, net of accumulated depreciation. Components of 

property, plant and equipment, net are summarized as follows:

(In millions)
Land........................................................................................................ $
Buildings..................................................................................................
Leasehold improvements ..........................................................................
Machinery and equipment .........................................................................
Computer software and hardware...............................................................
Furniture and fixtures ................................................................................
Construction in progress ...........................................................................
Total cost...............................................................................................
Less: accumulated depreciation ................................................................

Total property, plant and equipment, net................................................... $

As of December 31,

2016

2015

137.8 $

1,107.8
123.7
1,105.8
746.8
60.6
658.6
3,941.1
(1,439.3)
2,501.8 $

74.7
1,035.6
166.6
1,079.6
647.1
72.9
441.2
3,517.7
(1,330.1)
2,187.6

Depreciation expense totaled $309.3 million, $217.9 million and $198.4 million for 2016, 2015 and 2014,

respectively.

For 2016, 2015 and 2014, we capitalized interest costs related to construction in progress totaling 

approximately $12.9 million, $10.4 million and $6.4 million, respectively. 

Solothurn, Switzerland Facility

During the first quarter of 2016 we closed on the purchase of land in Solothurn, Switzerland for 64.4 million

Swiss Francs (approximately $62.5 million). We are building a biologics manufacturing facility on this land in the
Commune of Luterbach over the next several years. As of December 31, 2016 and 2015, we had approximately 
$481.5 million and $99.0 million, respectively, capitalized as construction in progress related to the construction of 
this facility. 

F- 36

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Research Triangle Park Facility Purchase

On August 24, 2015, we purchased from Eisai, Inc. (Eisai) its drug product manufacturing facility and 
supporting infrastructure in Research Triangle Park (RTP), North Carolina for $104.8 million. The purchase price
consisted of $58.6 million for buildings, $25.9 million for machinery and equipment and $20.3 million for land.

On August 24, 2015, we also amended our existing 10-year lease related to Eisai's oral solid dose products

PP

manufacturing facility in RTP North Carolina where we manufacture our and Eisai's oral solid dose products. As
amended, the lease provides for a three-year term and our agreement to purchase the facility upon expiration of the
lease term and Eisai's completion of certain activities. Accordingly, we recorded the assets along with a
corresponding financing obligation on our consolidated balance sheet for $20.3 million, the net present value of the 
future minimum lease payments. The assets were recorded as a component of buildings and machinery and
equipment. We expect to complete the purchase of the oral solid products manufacturing facility at the end of the
lease term in the third quarter of 2018.

11.  

Indebtedness

Our indebtedness is summarized as follows:

(In millions)
Current portion:

As of December 31,

2016

2015

Notes payable to Fumedica...................................................................... $
Financing arrangement for the purchase of the RTP facility .........................

Current portion of notes payable and other financing arrangements ........ $

Non-current portion:

6.875% Senior Notes due March 1, 2018............................................... $
2.900% Senior Notes due September 15, 2020......................................
3.625% Senior Notes due September 15, 2022......................................
4.050% Senior Notes due September 15, 2025......................................
5.200% Senior Notes due September 15, 2045......................................
Notes payable to Fumedica......................................................................
Financing arrangement for the purchase of the RTP facility .........................

Non-current portion of notes payable and other financing arrangements .. $

3.0 $
1.7
4.7 $

558.5 $

1,485.3
993.2
1,734.8
1,721.5
3.0
16.4
6,512.7 $

3.1
1.7
4.8

565.3
1,485.5
992.2
1,733.4
1,721.1
5.9
18.1
6,521.5

The following is a summary of our principal indebtedness as of December 31, 2016:

•  $550.0 million aggregate principal amount of 6.875% Senior Notes due March 1, 2018, valued at 99.184% of 

par;

•  $1.5 billion aggregate principal amount of 2.90% Senior Notes due September 15, 2020, valued at 99.792% of 

par;

•  $1.0 billion aggregate principal amount of 3.625% Senior Notes due September 15, 2022, valued at 99.920% 

of par;

•  $1.75 billion aggregate principal amount of 4.05% Senior Notes due September 15, 2025, valued at 99.764% 

of par; and

•  $1.75 billion aggregate principal amount of 5.20% Senior Notes due September 15, 2045, valued at 99.294% 

of par.

The costs associated with these offerings of approximately $52.0 million have been recorded as a reduction to 

the carrying amount of the debt on our consolidated balance sheet. These costs along with the discounts will be
amortized as additional interest expense using the effective interest rate method over the period from issuance
through maturity. 

F- 37

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

These notes are senior unsecured obligations. The notes may be redeemed at our option at any time at 100% 
of the principal amount plus accrued interest and a specified make-whole amount. The 6.875% Senior Notes due in
2018 contain a change of control provision that may require us to purchase the notes under certain circumstances. 
There is also an interest rate adjustment feature that requires us to pay interest at an increased rate on the notes if 
the credit rating on the notes declines below investment grade. The remaining Senior Notes contain a change of 
control provision that may require us to purchase the notes at a price equal to 101% of the principal amount plus 
accrued and unpaid interest to the date of purchase under certain circumstances.

In connection with the 2.90% Senior Notes offering due in 2020, we entered into interest rate swap contracts. 

The carrying value of the 2.90% Senior Notes includes approximately $4.6 million related to changes in the fair 
value of these contracts. For additional information, please read Note 9, Derivative Instruments, to these 
consolidated financial statements.

In connection with the 6.875% Senior Notes due in 2018, we entered into interest rate swap contracts where

we received a fixed rate and paid a variable rate. These contracts were terminated in December 2008. Upon
termination of these swaps, the carrying amount of the 6.875% Senior Notes due in 2018 was increased by $62.8 
million and is being amortized using the effective interest rate method over the remaining life of the Senior Notes 
and is being recognized as a reduction of interest expense. As of December 31, 2016, $9.9 million remains to be 
amortized. 

Notes Payable to Fumedica

In connection with our 2006 distribution agreement with Fumedica, we issued notes totaling 61.4 million Swiss 

Francs which were payable to Fumedica in varying amounts from June 2008 through June 2018. Our remaining note
payable to Fumedica had a carrying value of 6.2 million Swiss Francs ($6.0 million) and 8.9 million Swiss Francs 
($9.0 million) as of December 31, 2016 and 2015, respectively.

Credit Facility

In August 2015 we entered into a $1.0 billion, five-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 
December 31, 2016, we had no outstanding borrowings and were in compliance with all covenants under this facility.

Financing Arrangement

During 2015 we recorded a financing obligation in relation to the amendment of our lease agreement of Eisai's 
oral solid dose products manufacturing facility in RTP North Carolina where we manufacture our and Eisai's oral solid
dose products. As of December 31, 2016 and 2015, the financing obligation totaled approximately $18.1 million 
and $19.8 million, respectively. For additional information, please read Note 10, Property, Plant and Equipment to 
these consolidated financial statements.

PP

t

Debt Maturity

The total gross payments, excluding our financing arrangement, due under our debt arrangements are as 

follows:

(In millions)
2017 ............................................................................................................................ $
2018 ............................................................................................................................
2019 ............................................................................................................................
2020 ............................................................................................................................
2021 ............................................................................................................................
2022 and thereafter.......................................................................................................

Total ....................................................................................................................... $

As of December 31, 2016
3.1
553.1
—
1,500.0
—
4,500.0
6,556.2

The fair value of our debt is disclosed in Note 7, Fair Value Measurements to these consolidated financial

statements.

F- 38

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

12.  

 Equity

Preferred Stock

We have 8.0 million shares of Preferred Stock authorized, of which 1.75 million shares are authorized as 

Series A, 1.0 million shares are authorized as Series X junior participating and 5.25 million shares are
undesignated. Shares may be issued without a vote or action of stockholders from time to time in classes or series 
with the designations, powers, preferences, and the relative, participating, optional or other special rights of the
shares of each such class or series and any qualifications, limitations or restrictions thereon as set forth in the
instruments governing such shares. Any such Preferred Stock may rank prior to common stock as to dividend rights, 
liquidation preference or both, and may have full or limited voting rights and may be convertible into shares of 
common stock. No shares of Preferred Stock were issued and outstanding during 2016, 2015 and 2014.

Common Stock

The following table describes the number of shares authorized, issued and outstanding of our common stock 

as of December 31, 2016 and 2015:

(In millions)
Common stock ......................

Authorized

Issued

1,000.0

238.5

Outstanding
215.9

Authorized

Issued

Outstanding

1,000.0

241.2

218.6

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. Repurchased shares will be
retired. As of December 31, 2016, we repurchased and retired 3.3 million shares of common stock at a cost of $1.0 
billion under our 2016 Share Repurchase Program.

In May 2015 our Board of Directors authorized a program to repurchase up to $5.0 billion of our common stock 

(2015 Share Repurchase Program), which was completed as of December 31, 2015. As of December 31, 2015, we
repurchased and retired approximately 16.8 million shares of common stock at a cost of $5.0 billion under our 
2015 Share Repurchase Program.

In February 2011 our Board of Directors authorized a program to repurchase up to 20.0 million shares of our 

common stock (2011 Share Repurchase Program), which has been used principally to offset common stock
issuances under our share-based compensation plans. The 2011 Share Repurchase Program does not have an 
expiration date. We did not repurchase any shares of common stock under our 2011 Share Repurchase Program
during the years ended December 31, 2016 and 2015. During 2014 we purchased approximately 2.9 million shares 
of common stock at a cost of $886.8 million under our 2011 Share Repurchase Program. We have approximately 
1.3 million shares remaining available for repurchase under this authorization.

13.  

 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

Unrealized Gains
(Losses) on Cash
Flow Hedges

Unfunded Status
of Postretirement
Benefit Plans

Translation
Adjustments

Total

Balance, December 31, 2015 .. $

(0.8) $

10.2 $

(37.8) $

(195.6) $

(224.0)

Other comprehensive
income (loss) before
reclassifications..................
Amounts reclassified from
accumulated other
comprehensive income
(loss) .................................

Net current period other
comprehensive income (loss) .
Balance, December 31, 2016 .. $

(10.6)

51.6

5.1

(138.6)

(92.5)

0.6

(4.0)

—

—

(3.4)

(10.0)
(10.8) $

47.6
57.8 $

5.1
(32.7) $

(138.6)
(334.2) $

(95.9)
(319.9)

F- 39

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Unrealized Gains
(Losses) on
Securities
Available for Sale

Unrealized Gains
(Losses) on Cash
Flow Hedges

Unfunded Status
of Postretirement
Benefit Plans

Translation
Adjustments

Total

(0.4) $

71.7 $

(31.6) $

(99.2) $

(59.5)

(1.7)

110.8

(6.2)

(96.4)

6.5

(In millions)
Balance, December 31, 2014 .. $

Other comprehensive
income (loss) before
reclassifications..................
Amounts reclassified from
accumulated other
comprehensive income
(loss) .................................

Net current period other
comprehensive income (loss) .
Balance, December 31, 2015 .. $

(0.4)

(0.8) $

(61.5)

(96.4)

10.2 $

(37.8) $

(195.6) $

(164.5)

(224.0)

1.3

(172.3)

—

(171.0)

—

(6.2)

(In millions)

Unrealized Gains
(Losses) on
Securities
Available for Sale

Unrealized Gains
(Losses) on Cash
Flow Hedges

Unfunded Status
of Postretirement
Benefit Plans

Translation
Adjustments

Total

Balance, December 31, 2013 .. $

5.6 $

(23.7) $

(19.6) $

10.0 $

(27.7)

Other comprehensive
income (loss) before
reclassifications..................
Amounts reclassified from
accumulated other
comprehensive income
(loss) .................................

Net current period other
comprehensive income (loss) .
Balance, December 31, 2014 .. $

0.4

101.7

(12.0)

(109.2)

(19.1)

(6.4)

(6.3)

—

—

(6.0)
(0.4) $

95.4
71.7 $

(12.0)
(31.6) $

(109.2)

(99.2) $

(12.7)

(31.8)
(59.5)

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

(In millions)

Income Statement Location

2016

2015

2014

Gains (losses) on securities
available for sale..................... Other income (expense) ...... $

Income tax benefit
(expense)...........................

(0.9) $

(2.0) $

0.3

0.7

Amounts Reclassified from
Accumulated Other Comprehensive Income

For the Years Ended December 31,

Gains (losses) on cash flow
hedges ................................... Revenues...........................
Operating expenses ............
Other income (expense) ......
Income tax benefit
(expense)...........................

5.3
(1.5)

0.2

—

173.2
—

(0.1)

(0.8)

9.9

(3.5)

6.8
—

—

(0.5)

Total reclassifications, net of
tax .........................................

$

3.4 $

171.0 $

12.7

F- 40

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

14.  

 Earnings per Share

Basic and diluted earnings per share are calculated as follows:

(In millions)
Numerator:

For the Years Ended December 31,

2016

2015

2014

Net income attributable to Biogen Inc................................. $

3,702.8 $

3,547.0 $

2,934.8

Denominator:

Weighted average number of common shares outstanding...

Effect of dilutive securities:

Stock options and employee stock purchase plan ...............
Time-vested restricted stock units......................................
Market stock units............................................................
Dilutive potential common shares ........................................
Shares used in calculating diluted earnings per share .....

218.4

0.1
0.2
0.1
0.4
218.8

230.7

0.1
0.3
0.1
0.5
231.2

236.4

0.1
0.5
0.2
0.8
237.2

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

were insignificant.

Earnings per share for the years ended December 31, 2016, 2015 and 2014, reflects, on a weighted average
basis, the repurchase of 0.7 million shares, 4.6 million shares and 1.0 million shares, respectively, of our common 
stock under our share repurchase authorizations.

15.   Share-based Payments

Share-based Compensation Expense

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

income:

(In millions)
Research and development ................................................... $
Selling, general and administrative.........................................
Restructuring charges ...........................................................
Subtotal .............................................................................
Capitalized share-based compensation costs ..........................
Share-based compensation expense included in total cost
and expenses .....................................................................
Income tax effect ..................................................................
Share-based compensation expense included in net income
attributable to Biogen Inc. ................................................... $

For the Years Ended December 31,
2015

2014

2016

84.5 $

88.6 $

121.7
(1.8)
204.4
(14.6)

189.8
(54.0)

127.3
(8.6)
207.3
(11.0)

196.3
(55.8)

102.1
150.3
—
252.4
(10.0)

242.4
(72.2)

135.8 $

140.5 $

170.2

F- 41

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

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

compensation programs:

(In millions)
Market stock units ................................................................ $
Time-vested restricted stock units ..........................................
Cash settled performance units .............................................
Performance units.................................................................
Employee stock purchase plan...............................................
Subtotal .............................................................................
Capitalized share-based compensation costs ..........................
Share-based compensation expense included in total cost
and expenses ..................................................................... $

For the Years Ended December 31,

2016

2015

2014

38.4 $

38.1 $

120.0
16.3
18.6
11.1
204.4
(14.6)

119.0
22.4
13.9
13.9
207.3
(11.0)

37.4
115.4
65.5
21.9
12.2
252.4
(10.0)

189.8 $

196.3 $

242.4

Windfall tax benefits from vesting of stock awards, exercises of stock options and ESPP participation were

$12.6 million, $78.2 million and $96.4 million in 2016, 2015 and 2014, respectively. These amounts have been
calculated under the alternative transition method.

As of December 31, 2016, unrecognized compensation cost related to unvested share-based compensation
was approximately $189.8 million, net of estimated forfeitures. We expect to recognize the cost of these unvested
awards over a weighted-average period of 1.9 years.

Share-Based Compensation Plans

We have three share-based compensation plans pursuant to which awards are currently being made: (i) the 

Biogen Inc. 2006 Non-Employee Directors Equity Plan (2006 Directors Plan); (ii) the Biogen Inc. 2008 Amended and
Restated Omnibus Equity Plan (2008 Omnibus Plan); and (iii) the Biogen Inc. 2015 Employee Stock Purchase Plan 
(ESPP).

Directors Plan

In May 2006 our stockholders approved the 2006 Directors Plan for share-based awards to our directors. 
Awards granted from the 2006 Directors Plan may include stock options, shares of restricted stock, restricted stock
units, stock appreciation rights and other awards in such amounts and with such terms and conditions as may be 
determined by a committee of our Board of Directors, subject to the provisions of the plan. We have reserved a total 
of 1.6 million shares of common stock for issuance under the 2006 Directors Plan. The 2006 Directors Plan 
provides that awards other than stock options and stock appreciation rights will be counted against the total number 
of shares reserved under the plan in a 1.5-to-1 ratio. In June 2015 our stockholders approved an amendment to
extend the term of the 2006 Directors Plan until June 2025.

Omnibus Plans

In June 2008 our stockholders approved the 2008 Omnibus Plan for share-based awards to our employees.

Awards granted from the 2008 Omnibus Plan may include stock options, shares of restricted stock, restricted stock 
units, performance shares, shares of phantom stock, stock appreciation rights and other awards in such amounts
and with such terms and conditions as may be determined by a committee of our Board of Directors, subject to the
provisions of the plan. Shares of common stock available for issuance under the 2008 Omnibus Plan consist of 15.0 
million shares reserved for this purpose, plus shares of common stock that remained available for issuance under 
our 2005 Omnibus Equity Plan on the date that our stockholders approved the 2008 Omnibus Plan, plus shares that 
were subject to awards under the 2005 Omnibus Equity Plan that remain unissued upon the cancellation, surrender,
exchange or termination of such awards. The 2008 Omnibus Equity Plan provides that awards other than stock
options and stock appreciation rights will be counted against the total number of shares available under the plan in a
1.5-to-1 ratio.

We have not made any awards pursuant to the 2005 Omnibus Equity Plan since our stockholders approved the
2008 Omnibus Plan, and do not intend to make any awards pursuant to the 2005 Omnibus Equity Plan in the future,
except that unused shares under the 2005 Omnibus Equity Plan have been carried over for use under the 2008 
Omnibus Plan.

F- 42

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Stock Options

We currently do not grant stock options to our employees or directors. Outstanding stock options previously 
granted to our employees and directors generally have a ten-year term and vest over a period of between one and 
four years, provided the individual continues to serve at Biogen through the vesting dates. Options granted under all 
plans are exercisable at a price per share not less than the fair market value of the underlying common stock on the 
date of grant. The estimated fair value of options, including the effect of estimated forfeitures, is recognized over the 
options’ vesting periods. The fair value of the stock options granted in 2010 was estimated as of the date of grant
using a Black-Scholes option valuation model. There were no grants of stock options made in 2016, 2015 and 
2014. As of December 31, 2016, all outstanding options were exercisable.

The expected life of options granted is derived using assumed exercise rates based on historical exercise 
patterns and represents the period of time that options granted are expected to be outstanding. Expected stock 
price volatility is based upon implied volatility for our exchange-traded options and other factors, including historical
volatility. After assessing all available information on either historical volatility, implied volatility, or both, we have 
concluded that a combination of both historical and implied volatility provides the best estimate of expected volatility. 
The risk-free interest rate used is determined by the market yield curve based upon risk-free interest rates 
established by the Federal Reserve, or non-coupon bonds that have maturities equal to the expected term. The
dividend yield of zero is based upon the fact that we have not historically granted cash dividends, and do not expect
to issue dividends in the foreseeable future. Stock options granted prior to January 1, 2006 were valued based on 
the grant date fair value of those awards, using the Black-Scholes option pricing model, as previously calculated for 
pro-forma disclosures.

The following table summarizes our stock option activity:

Outstanding at December 31, 2015 ............................................................
Granted ...................................................................................................
Exercised.................................................................................................
Cancelled ................................................................................................
Outstanding at December 31, 2016 ............................................................

Shares

107,000 $
— $
(41,000) $
— $
66,000 $

Weighted
Average
Exercise
Price

53.94
—
53.75
—
54.06

The total intrinsic values of options exercised in 2016, 2015 and 2014 totaled $10.4 million, $38.0 million
and $42.7 million, respectively. The aggregate intrinsic values of options outstanding as of December 31, 2016 
totaled $15.0 million. The weighted average remaining contractual term for options outstanding as of December 31,
2016 was 2.0 years.

The following table summarizes the amount of tax benefit realized for stock options and cash received from the

exercise of stock options:

(In millions)
Tax benefit realized for stock options..................................... $
Cash received from the exercise of stock options ................... $

For the Years Ended December 31,

2016

2015

2014

4.0 $
2.2 $

11.9 $
6.3 $

13.0
8.5

Market Stock Units (MSUs)

MSUs awarded to employees prior to 2014 vested in four equal annual increments beginning on the first 
anniversary of the grant date. Participants may ultimately earn between 0% and 150% of the target number of units 
granted based on actual stock performance. 

MSUs awarded to employees in 2014, 2015 and 2016 vest in three equal annual increments beginning on the 
first anniversary of the grant date, and participants may ultimately earn between 0% and 200% of the target number 
of units granted based on actual stock performance. 

F- 43

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The vesting of these awards is subject to the respective employee’s continued employment. The number of 

MSUs granted represents the target number of units that are eligible to be earned based on the attainment of 
certain market-based criteria involving our stock price. The number of MSUs earned is calculated at each annual 
anniversary from the date of grant over the respective vesting periods, resulting in multiple performance periods. 
Accordingly, additional MSUs may be issued or currently outstanding MSUs may be cancelled upon final
determination of the number of awards earned. Compensation expense, including the effect of forfeitures, is
recognized over the applicable service period.

The following table summarizes our MSU activity:

Unvested at December 31, 2015 ................................................................
Granted (a) ..............................................................................................
Vested.....................................................................................................
Forfeited..................................................................................................
Unvested at December 31, 2016 ................................................................

Shares

269,000 $
168,000 $
(155,000) $
(52,000) $
230,000 $

Weighted
Average
Grant Date
Fair Value

339.89
328.03
244.68
371.62
355.60

(a)  MSUs granted in 2016 include approximately 15,000 and 20,000 MSUs issued in 2016 based upon the attainment of 
performance criteria set for 2013 and 2012, respectively, in relation to awards granted in those years. The remainder of 
MSUs granted during 2016 include awards granted in conjunction with our annual awards made in February 2016 and MSUs 
granted in conjunction with the hiring of employees. These grants reflect the target number of shares eligible to be earned
at the time of grant.

We value grants of MSUs using a lattice model with a Monte Carlo simulation. This valuation methodology 

utilizes several key assumptions, including the 60 calendar day average closing stock price on grant date for MSUs
awarded prior to 2014, the 30 calendar day average closing stock price on the date of grant for MSUs awarded in 
2014, 2015 and 2016, expected volatility of our stock price, risk-free rates of return and expected dividend yield.

 The assumptions used in our valuation are summarized as follows:

Expected dividend yield .......................................
Range of expected stock price volatility ................
Range of risk-free interest rates...........................
30 calendar day average stock price on grant date $260.67 - $304.86 $277.35 - $426.27 $280.88 - $335.65
Weighted-average per share grant date fair value ..

$395.22

$493.43

$328.03

For the Years Ended December 31,
2015
—%
31.0% - 33.2%
0.2% - 1.0%

2014
—%
31.7% - 35.1%
0.1% - 0.7%

2016
—%
38.2% - 40.7%
0.6% - 0.9%

The total fair values of MSUs vested in 2016, 2015 and 2014 totaled $39.3 million, $109.0 million and 

$117.4 million, respectively.

Cash Settled Performance Units (CSPUs)

CSPUs awarded to employees vest in three equal annual increments beginning on the first anniversary of the 

grant date. The vesting of these awards is subject to the respective employee’s continued employment with such 
awards settled in cash. The number of CSPUs granted represents the target number of units that are eligible to be 
earned based on the attainment of certain performance measures established at the beginning of the performance
period, which ends on December 31 of each year. Participants may ultimately earn between 0% and 200% of the 
target number of units granted based on the degree of actual performance metric achievement. Accordingly,
additional CSPUs may be issued or currently outstanding CSPUs may be cancelled upon final determination of the 
number of units earned. CSPUs awarded prior to 2014 are settled in cash based on the 60 calendar day average
closing stock price through each vesting date once the actual vested and earned number of units is known. CSPUs
awarded in 2014, 2015 and 2016 will be settled in cash based on the 30 calendar day average closing stock price 
through each vesting date, once the actual vested and earned number of units is known. Since no shares are issued, 
these awards do not dilute equity. Compensation expense, including the effect of forfeitures, is recognized over the
applicable service period.

F- 44

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The following table summarizes our CSPU activity:

Unvested at December 31, 2015..........................................................................................
Granted (a)........................................................................................................................
Vested..............................................................................................................................
Forfeited ...........................................................................................................................
Unvested at December 31, 2016..........................................................................................

Shares

192,000
86,000
(117,000)
(39,000)
122,000

(a) CSPUs granted in 2016 include awards granted in conjunction with our annual awards made in February 2016 and CSPUs
granted in conjunction with the hiring of employees. These grants reflect the target number of shares eligible to be earned
at the time of grant.

The total cash paid in settlement of CSPUs vested in 2016, 2015 and 2014 totaled $31.9 million, $79.8

million and $92.8 million, respectively. 

Performance-vested Restricted Stock Units (PUs)

In 2014 we revised our long term incentive program to include a new type of award granted to certain 
employees in the form of restricted stock units that may be settled in cash or shares of our common stock at the
sole discretion of the Compensation and Management Development Committee of our Board of Directors. These 
awards are structured and accounted for the same way as the cash settled performance units, and vest in three 
equal annual increments beginning on the first anniversary of the grant date. The number of PUs granted represents 
the target number of units that are eligible to be earned based on the attainment of certain performance measures
established at the beginning of the performance period, which ends on December 31 of each year. Participants may 
ultimately earn between 0% and 200% of the target number of units granted based on the degree of actual
performance metric achievement. Accordingly, additional PUs may be issued or currently outstanding PUs may be 
cancelled upon final determination of the number of units earned. PUs settling in cash are based on the 30 calendar 
day average closing stock price through each vesting date once the actual vested and earned number of units is 
known. Compensation expense, including the effect of forfeitures, is recognized over the applicable service period.

The following table summarizes our PU activity:

Unvested at December 31, 2015..........................................................................................
Granted (a)........................................................................................................................
Vested..............................................................................................................................
Forfeited ...........................................................................................................................
Unvested at December 31, 2016..........................................................................................

Shares

103,000
55,000
(31,000)
(17,000)
110,000

(a)  PUs granted in 2016 include awards granted in conjunction with our annual awards made in February 2016 and PUs granted 
in conjunction with the hiring of employees. These grants reflect the target number of shares eligible to be earned at the 
time of grant.

During 2015 32,000 PU were converted to share settlements, of which approximately 11,000 shares were

vested and issued. All other PUs that vested in 2015 were settled in cash totaling $12.4 million.

All PUs that vested in 2016 were settled in cash totaling $8.1 million.

Time-Vested Restricted Stock Units (RSUs)

RSUs awarded to employees generally vest no sooner than one-third per year over three years on the 

anniversary of the date of grant, or upon the third anniversary of the date of the grant, provided the employee
remains continuously employed with us, except as otherwise provided in the plan. Shares of our common stock will
be delivered to the employee upon vesting, subject to payment of applicable withholding taxes. RSUs awarded to 
directors for service on our Board of Directors vest on the first anniversary of the date of grant, provided in each
case that the director continues to serve on our Board of Directors through the vesting date. Shares of our common 
stock will be delivered to the director upon vesting and are not subject to any withholding taxes. The fair value of all 
RSUs is based on the market value of our stock on the date of grant. Compensation expense, including the effect of 
forfeitures, is recognized over the applicable service period.

F- 45

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The following table summarizes our RSU activity:

Unvested at December 31, 2015................................................................
Granted (a)..............................................................................................
Vested....................................................................................................
Forfeited .................................................................................................
Unvested at December 31, 2016................................................................

Shares

810,000 $
649,000 $
(406,000) $
(165,000) $
888,000 $

Weighted
Average
Grant Date
Fair Value

323.87
268.52
285.13
310.30
303.49

(a) RSUs granted in 2016 primarily represent RSUs granted in conjunction with our annual awards made in February 2016 and

awards made in conjunction with the hiring of new employees. RSUs granted in 2016 also include approximately 11,000 
RSUs granted to our Board of Directors.

RSUs granted in 2015 and 2014 had weighted average grant date fair values of $388.88 and $321.72, 

respectively.

The total fair values of RSUs vested in 2016, 2015 and 2014 totaled $104.6 million, $239.7 million and 

$281.1 million, respectively. 

Employee Stock Purchase Plan (ESPP)

In June 2015 our stockholders approved the Biogen Inc. 2015 ESPP (2015 ESPP). The 2015 ESPP which 
became effective on July 1, 2015, replaced the Biogen Idec Inc. 1995 ESPP (1995 ESPP), which expired on June 30, 
2015. The maximum aggregate number of shares of our common stock that may be purchased under the 2015
ESPP is 6.2 million.

PP

The following table summarizes our ESPP activity:

(In millions, except share amounts)
Shares issued under the 2015 ESPP ..................................
Shares issued under the 1995 ESPP ..................................
Cash received under the 2015 ESPP................................... $
Cash received under the 1995 ESPP................................... $

For the Years Ended December 31,
2015

2016

190,000
—
41.5 $
— $

78,000
98,000
19.3
30.0 $

2014
**
180,000
**

46.4

F- 46

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

16.   

Income Taxes

Income Tax Expense

Income before income tax provision and the income tax expense consist of the following:

(In millions)
Income before income taxes (benefit):

For the Years Ended December 31,
2015

2014

2016

Domestic.......................................................................... $
Foreign .............................................................................

Total............................................................................. $

3,655.4 $
1,277.6
4,933.0 $

3,386.7 $
1,380.6
4,767.3 $

2,557.4
1,389.2
3,946.6

Income tax expense (benefit):
Current:

Federal ............................................................................. $
State................................................................................
Foreign .............................................................................
Total.............................................................................

Deferred:

Federal ............................................................................. $
State................................................................................
Foreign .............................................................................
Total.............................................................................
Total income tax expense................................................... $

1,304.3 $
55.1
52.9
1,412.3

(125.6) $
(3.8)
(45.6)
(175.0)
1,237.3 $

1,214.1 $
38.6
54.5
1,307.2

(129.6) $
(1.9)
(14.1)
(145.6)
1,161.6 $

1,159.5
65.2
73.4
1,298.1

(280.9)
(21.0)
(6.3)
(308.2)
989.9

Deferred Tax Assets and Liabilities

Significant components of our deferred tax assets and liabilities are summarized as follows:

(In millions)
Deferred tax assets:

2016

2015

Tax credits............................................................................................... $
Inventory, other reserves and accruals .......................................................
Intangibles, net ........................................................................................
Net operating loss....................................................................................
Share-based compensation.......................................................................
Other.......................................................................................................
Valuation allowance..................................................................................

Total deferred tax assets ...................................................................... $

Deferred tax liabilities:

Purchased intangible assets ..................................................................... $
Depreciation, amortization and other .........................................................

Total deferred tax liabilities ................................................................... $

201.1 $
250.6
459.8
65.9
61.5
49.0
(16.1)
1,071.8 $

(376.6) $
(113.5)
(490.1) $

189.3
243.9
328.3
24.7
63.8
35.8
(14.1)
871.7

(440.1)
(102.7)
(542.8)

In addition to deferred tax assets and liabilities, we have recorded prepaid tax and deferred charges related to
intercompany transactions. As of December 31, 2016 and 2015, the total deferred charges and prepaid taxes were 
$989.8 million and $697.9 million, respectively.

F- 47

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Tax Rate

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

For the Years Ended December 31,
2015

2014

2016

Statutory rate .......................................................................
State taxes...........................................................................
Taxes on foreign earnings......................................................
Credits and net operating loss utilization ................................
Purchased intangible assets ..................................................
Manufacturing deduction .......................................................
Other permanent items .........................................................
Other ...................................................................................
Effective tax rate.................................................................

35.0%
0.9
(9.6)
(1.4)
1.2
(1.9)
0.5
0.4
25.1%

35.0%
0.5
(10.0)
(1.3)
1.0
(1.8)
0.7
0.3
24.4%

35.0%
1.2
(9.5)
(1.1)
1.2
(1.8)
0.5
(0.4)
25.1%

Our effective tax rate for 2016 compared to 2015 increased primarily due to a net state tax benefit in 2015 

resulting from the remeasurement of one of our uncertain tax positions, described below, and a higher relative 
percentage of our earnings being attributed to the U.S., a higher tax jurisdiction.

Our effective tax rate for 2015 compared to 2014 benefited from lower taxes on foreign earnings and reflects a

$27.0 million benefit from the 2015 remeasurement of one of our uncertain tax positions.

As of December 31, 2016, we had net operating losses and general business credit carry forwards for federal

income tax purposes of approximately $22.5 million and $140.0 million, respectively, which begin to expire in 2020. 
Additionally, for state income tax purposes, we had net operating loss carry forwards of approximately $86.4 million, 
which begin to expire in 2017. For state income tax purposes, we also had research and investment credit carry 
forwards of approximately $126.6 million, which begin to expire in 2017. For foreign income tax purposes, we had 
$489.4 million of net operating loss carryforwards, which begin to expire in 2021.

In assessing the realizability of our deferred tax assets, we have considered whether it is more likely than not 

that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets
is dependent upon the generation of future taxable income during the periods in which those temporary differences 
become deductible. In making this determination, under the applicable financial reporting standards, we are allowed
to consider the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning 
strategies. Our estimates of future taxable income take into consideration, among other items, our estimates of 
future income tax deductions related to the exercise of stock options. Based upon the level of historical taxable
income and income tax liability and projections for future taxable income over the periods in which the deferred tax
assets are utilizable, we believe it is more likely than not that we will realize the net benefits of the deferred tax 
assets of our wholly owned subsidiaries. In the event that actual results differ from our estimates or we adjust our 
estimates in future periods, we may need to establish a valuation allowance, which could materially impact our 
financial position and results of operations.

As of December 31, 2016, undistributed foreign earnings of non-U.S. subsidiaries included in consolidated

retained earnings and other basis differences aggregated approximately $7.6 billion. We intend to reinvest these 
earnings indefinitely in operations outside the U.S. The residual U.S. tax liability, if cumulative amounts were 
repatriated, would be between $1.8 billion to $2.3 billion as of December 31, 2016.

F- 48

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Accounting for Uncertainty in Income Taxes

A reconciliation of the beginning and ending amount of our unrecognized tax benefits is summarized as follows:

(In millions)
Balance at January 1, ............................................................... $
Additions based on tax positions related to the current period ...
Additions for tax positions of prior periods................................
Reductions for tax positions of prior periods .............................
Statute expirations .................................................................
Settlements ...........................................................................
Balance at December 31,.......................................................... $

2016

2015

2014

67.9 $
7.2
36.3
(13.3)
(1.4)
(64.3)
32.4 $

131.5 $

10.5
19.5
(49.9)
(1.2)
(42.5)
67.9 $

110.1
20.8
86.1
(23.4)
(1.6)
(60.5)
131.5

We and our subsidiaries are routinely examined by various taxing authorities. We file income tax returns in the
U.S. federal jurisdiction, various U.S. states, and foreign jurisdictions. With few exceptions, including the proposed 
disallowance we discuss below, 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. 

Included in the balance of unrecognized tax benefits as of December 31, 2016, 2015 and 2014 are $26.9 
million, $15.7 million and $53.6 million (net of the federal benefit on state issues), respectively, of unrecognized tax 
benefits that, if recognized, would affect the effective income tax rate in future periods. 

We recognize potential interest and penalties accrued related to unrecognized tax benefits in income tax 
expense. In 2016 we recognized a net interest expense of $9.1 million. In 2015 we recognized net interest expense 
of $3.1 million. In 2014 we recognized a net interest expense of approximately $4.1 million. We have accrued 
approximately $25.2 million and $12.5 million for the payment of interest as of December 31, 2016 and 2015, 
respectively.

In March 2015 we received a final assessment from the Danish Tax Authority (SKAT) for fiscal 2009 regarding 
withholding taxes and the treatment of certain intercompany transactions involving a Danish affiliate and another of 
our affiliates. In April 2016 we received final assessments from the SKAT for 2011 and 2013 regarding withholding
taxes for similar intercompany transactions. The total amount assessed for 2009, 2011 and 2013 is estimated to
be $58.3 million, including interest. For the assessments related to 2011 and 2013 we have made payments to
SKAT totaling $12.2 million. We continue to dispute the assessments for all of these periods and believe that the
positions taken in our historical filings are valid.

Federal Uncertain Tax Positions

During the year ended December 31, 2015, the net effect of adjustments to one of our uncertain tax positions 
was a net benefit of approximately $27.0 million, primarily related to the state impact of a federal uncertain tax item.

It is reasonably possible that we will adjust the value of our uncertain tax positions related to our revenues 
from anti-CD20 therapeutic programs and certain transfer pricing issues as we receive additional information from
various taxing authorities, including reaching settlements with the authorities. In addition, the IRS and other national
tax authorities routinely examine our intercompany transfer pricing with respect to intellectual property related 
transactions and it is possible that they may disagree with one or more positions we have taken with respect to such 
valuations.

F- 49

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

17.  

 Other Consolidated Financial Statement Detail

Supplemental Cash Flow Information

Supplemental disclosure of cash flow information for the years ended December 31, 2016, 2015 and 2014, is

as follows:

(In millions)
Cash paid during the year for:

For the Years Ended December 31,
2015

2014

2016

Interest......................................................................... $
Income taxes ................................................................ $

281.2 $
1,642.2 $

39.1 $
1,674.8 $

41.2
1,163.2

Non-cash Operating, Investing and Financing Activity

In December 2016 we accrued $454.8 million related to the recent settlement and license agreement with

Forward Pharma A/S (Forward Pharma). For additional information related to this transaction, please read Note 21,
Commitment and Contingencies to these consolidated financial statements. 

In the fourth quarter of 2016 we accrued $300.0 million upon reaching $11.0 billion in total cumulative sales
of Fumapharm Products. The amount, net of tax benefit, was accounted for as an increase to goodwill in accordance
with the accounting standard applicable to business combinations when we acquired Fumapharm and is expected to 
be paid in the first quarter of 2017. For additional information related to this transaction, please read Note 21, 
Commitments and Contingencies to these consolidated financial statements. 

In connection with the construction of our manufacturing facility in Solothurn, Switzerland, we accrued charges 

related to processing equipment and engineering services of approximately $100.0 million in our consolidated 
balance sheet. For additional information related to this transaction, please read Note 10, Property, Plant and
Equipment to these consolidated financial statements. 

t

In February 2015 upon completion of our acquisition of Convergence, we recorded a contingent consideration 

obligation of $274.5 million as part of the purchase price. For additional information related to this transaction, 
please read Note 2, Acquisitions to these consolidated financial statements.

Other Income (Expense), Net

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

(In millions)
Interest income .................................................................. $
Interest expense ................................................................
Gain (loss) on investments, net ...........................................
Foreign exchange gains (losses), net....................................
Other, net...........................................................................

Total other income (expense), net...................................... $

For the Years Ended December 31,
2015

2014

2016

63.4 $

(260.0)
6.0
(9.8)
(17.0)
(217.4) $

22.1 $
(95.5)
(3.8)
(32.7)
(13.8)
(123.7) $

12.2
(29.5)
11.8
(11.6)
(8.7)
(25.8)

Other Current Assets

Other current assets include prepaid taxes totaling approximately $817.0 million and $550.6 million as of 

December 31, 2016 and 2015, respectively.

F- 50

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Accrued Expenses and Other

Accrued expenses and other consists of the following:

(In millions)
Current portion of contingent consideration obligations ................................. $
Accrued TECFIDERA litigation settlement and license charges ........................
Revenue-related reserves for discounts and allowances ................................
Employee compensation and benefits ..........................................................
Royalties and licensing fees ........................................................................
Construction in progress .............................................................................
Collaboration expenses...............................................................................
Other .........................................................................................................

Total accrued expenses and other.............................................................. $

As of December 31,

2016

2015

580.8 $
454.8
438.6
282.9
195.8
134.0
130.9
685.7
2,903.5 $

504.7
—
518.1
270.8
167.9
87.9
31.2
516.2
2,096.8

Pricing of TYSABRI in Italy - AIFA

In the fourth quarter of 2011 Biogen Italia SRL, our Italian subsidiary, received a notice from the Italian National 

Medicines Agency (Agenzia Italiana del Farmaco or AIFA) that sales of TYSABRI after mid-February 2009 through mid-
February 2011 exceeded by EUR30.7 million a reimbursement limit established pursuant to a Price Determination
Resolution granted by AIFA in December 2006. In January 2012 we filed an appeal against AIFA in administrative
court in Rome, Italy seeking a ruling that the reimbursement limit in the Price Determination Resolution should apply 
as written to only “the first 24 months” of TYSABRI sales, which ended in mid-February 2009. That appeal is still 
pending. Since being notified in the fourth quarter of 2011 that AIFA believed a reimbursement limit was still in 
effect, we deferred revenue on sales of TYSABRI as if the reimbursement limit were in effect for each biannual period
beginning in mid-February 2009.

In July 2013 we negotiated an agreement in principle with AIFA's Price and Reimbursement Committee that

would have resolved all of AIFA's claims relating to sales of TYSABRI in excess of the reimbursement limit for the 
periods from February 2009 through January 2013 for an aggregate repayment of EUR33.3 million. As a result of 
this agreement in principle, we recorded a liability and reduction to revenue of EUR15.4 million at June 30, 2013, 
which approximated 50% of the claim related to the period from mid-February 2009 through mid-February 2011. As
of December 31, 2016, we have approximately EUR79 million recorded as accrued expenses and other in our 
consolidated balance sheets for the periods mid-February 2009 through January 2013, respectively.

In June 2014 AIFA approved a resolution affirming that there is no reimbursement limit from and after February 

2013. As a result, we recognized $53.5 million of TYSABRI revenues related to the periods February 2013 through
June 2014 that were previously deferred. 

In January 2017 we negotiated an agreement in principle with AIFA's Price and Reimbursement Committee to 
settle all of AIFA's existing claims relating to sales of TYSABRI in excess of the reimbursement limit for the periods 
from February 2009 through January 2013 for an aggregate repayment of EUR37.4 million. The agreement is subject 
to ratification by AIFA. If this most recent settlement agreement is accepted, we will recognize approximately EUR42 
million in revenue upon final resolution of this matter. 

F- 51

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

18.  

Investments in Variable Interest Entities

Consolidated Variable Interest Entities

Our consolidated financial statements include the financial results of variable interest entities in which we are 

the primary beneficiary. The following are our significant variable interest entities.

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. Our anti-amyloid beta antibody, aducanumab, for 
the treatment of Alzheimer’s disease resulted from this collaboration. In September 2015 we announced that the 
first patient had been enrolled in a Phase 3 trial for aducanumab, which triggered a $60.0 million milestone payment 
due to Neurimmune. As we consolidate the financial results of Neurimmune, we recognized this payment as a charge 
to noncontrolling interest in the third quarter of 2015. Based upon our current development plans for aducanumab, 
we may pay Neurimmune up to $275.0 million in remaining milestone payments. We may also pay royalties in the
low-to-mid-teens on sales of any resulting commercial products.

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. 
Accordingly, we consolidate the results of Neurimmune.

We are required to reimburse Neurimmune for amounts that are incurred by Neurimmune for research and 

development expenses in support of the collaboration. Amounts reimbursed are reflected in research and
development expense in our consolidated statements of income. During the years ending December 31, 2016, 2015 
and 2014, these amounts were immaterial. Future milestone payments and royalties, if any, will be reflected in our 
consolidated statements of income as a charge to noncontrolling interest, net of tax, when such milestones are
achieved.

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.

Rodin Therapeutics, Inc.

In December 2015 we paid $8.0 million for preferred stock in Rodin Therapeutics, Inc. (Rodin) and entered into 

an option and collaboration agreement which gave us the right to purchase all remaining outstanding shares of 
Rodin at any time until 35 days after acceptance of an Investigational New Drug (IND) application by the FDA. As we
determined that we were the primary beneficiary of Rodin, we consolidated the results of Rodin and recorded an
IPR&D intangible asset of approximately $8.7 million and assigned approximately $10.9 million to noncontrolling
interest.  

During the fourth quarter of 2016 we terminated our collaboration agreement with Rodin. Upon termination of 
the collaboration agreement, we deconsolidated the results of Rodin and impaired the IPR&D asset, resulting in an 
impairment loss of $8.7 million related to the IPR&D asset recorded upon entering into the collaboration agreement. 

The assets and liabilities of Rodin were not significant to our financial position or results of operations as 

Rodin is a research and development organization. We had provided no financing to Rodin other than the 
contractually required amounts disclosed above.

Ataxion Inc.

In February 2014 we paid $1.6 million for preferred stock in Ataxion, Inc. (Ataxion) and entered into an option
and collaboration agreement which gave us the right to purchase all outstanding shares of Ataxion at any time until
30 days after delivery of a Phase 1 clinical trial study report. As we determined that we were the primary beneficiary 
of Ataxion, we consolidated the results of Ataxion and recorded an IPR&D intangible asset of $3.5 million and
assigned that amount to noncontrolling interest.

F- 52

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

During the fourth quarter of 2016 we terminated our option agreement with Ataxion. Upon termination of the

collaboration agreement, we deconsolidated the results of Ataxion and impaired the IPR&D asset, resulting in an
impairment loss of $3.5 million related to the IPR&D asset recorded upon entering into the collaboration agreement.

The assets and liabilities of Ataxion were not significant to our financial position or results of operations as

Ataxion is a research and development organization. We had provided no financing to Ataxion other than the
contractually required amounts disclosed above.

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 December 31, 2016 and 2015, the total carrying value of our investments in biotechnology companies

totaled $47.4 million and $29.2 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 consolidated statements of income, as they are incurred. We have provided no financing 
to these variable interest entities other than previously contractually required amounts.

19.  

 Collaborative and Other Relationships

In connection with our business strategy, we have entered into various collaboration agreements which provide 

us with rights to develop, produce and market products using certain know-how, technology and patent rights 
maintained by our collaborative partners. Terms of the various collaboration agreements may require us to make
milestone payments upon the achievement of certain product research and development objectives and pay royalties 
on future sales, if any, of commercial products resulting from the collaboration.

Depending on the collaborative arrangement, we may record funding receivable or payable balances with our 
partners, based on the nature of the cost-sharing mechanism and activity within the collaboration. Our significant 
collaboration arrangements are discussed below.

Genentech (Roche Group)

We have certain business and financial rights with respect to RITUXAN for the treatment of non-Hodgkin's 

lymphoma (NHL), chronic lymphocytic leukemia (CLL) and other conditions, GAZYVA indicated for the treatment of 
CLL and follicular lymphoma, and other potential anti-CD20 therapies under a collaboration agreement with
Genentech, Inc. (Genentech), a wholly-owned member of the Roche Group. The Roche Group and its sub-licensees 
maintain sole responsibility for the development, manufacturing and commercialization of GAZYVA in the U.S. 

Our collaboration agreement will continue in effect until we mutually agree to terminate the collaboration,
except that if we undergo a change in control, as defined in the collaboration agreement, Genentech has the right to 
present an offer to buy the rights to RITUXAN and we must either accept Genentech’s offer or purchase Genentech’s
rights on the same terms as its offer. Genentech will also be deemed concurrently to have purchased our rights to
any other anti-CD20 products in development in exchange for a royalty and our rights to GAZYVA in exchange for the
compensation described in the table below. Our collaboration with Genentech was created through a contractual 
arrangement and not through a joint venture or other legal entity.

RITUXAN

Genentech is responsible for the worldwide manufacturing of RITUXAN. Development and commercialization

rights and responsibilities under this collaboration are divided as follows:

U.S.

We share with Genentech co-exclusive rights to develop, commercialize and market RITUXAN in the U.S.

F- 53

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Canada

We and Genentech have assigned our rights under our collaboration agreement with respect to Canada to the

Roche Group.

GAZYVA

We recognize our share of the development and commercialization expenses of GAZYVA as a reduction of our 

share of pre-tax profits in revenues from anti-CD20 therapeutic programs. 

Commercialization of GAZYVA impacts our percentage of the co-promotion profits for RITUXAN, as summarized 

in the table below.

OCREVUS (Ocrelizumab)

Genentech is solely responsible for development and commercialization of OCREVUS, a humanized anti-CD20

monoclonal antibody currently in development for MS, and funding future costs. Genentech cannot develop
OCREVUS in CLL, NHL or Rheumatoid Arthritis (RA). We will receive tiered royalties between 13.5% and 24% on U.S.
net sales of OCREVUS if approved for commercial sale by the FDA. The FDA has accepted for review the Biologics
License Application for OCREVUS for the treatment of relapsing multiple sclerosis (RMS) and primary-progressive 
multiple sclerosis (PPMS), and has granted the application Priority Review Designation. There will be a 50% reduction
to these royalties if a biosimilar to OCREVUS is approved in the U.S. In addition, we will receive a 3% royalty on net 
sales of OCREVUS outside the U.S., with the royalty period lasting 11 years from the first commercial sale of 
OCREVUS on a country-by-country basis. In June 2016 the European Medicines Agency (EMA) validated its marketing
authorization application (MAA) of OCREVUS for the treatment of RMS and PPMS in the E.U. 

Commercialization of OCREVUS will not impact the percentage of the co-promotion profits we receive for 

RITUXAN or GAZYVA.

Profit-sharing Formulas

RITUXAN Profit Share

Our current pretax co-promotion profit-sharing formula for RITUXAN provides for a 30% share on the first $50.0

million of co-promotion operating profits earned each calendar year. Our share of annual co-promotion profits in
excess of $50.0 million varies, as summarized in the table below, upon the following events:

Until GAZYVA First Non-CLL FDA Approval ..............................................................................
After GAZYVA First Non-CLL FDA Approval until First GAZYVA Threshold Date ............................
After First GAZYVA Threshold Date until Second GAZYVA Threshold Date .................................
After Second GAZYVA Threshold Date ...................................................................................

40.0%
39.0%
37.5%
35.0%

First Non-CLL GAZYVA FDA Approval means the FDA’s first approval of GAZYVA in an indication other than CLL.

pp

First GAZYVA Threshold Date means the earlier of (1) the date of the First Non-CLL GAZYVA FDA approval if U.S.
gross sales of GAZYVA for the preceding consecutive 12 month period were at least $150.0 million or (2) the 
first day of the calendar quarter after the date of the First Non-CLL GAZYVA FDA Approval that U.S. gross sales
of GAZYVA within any consecutive 12 month period have reached $150.0 million.

Second GAZYVA Threshold Date means the first day of the calendar quarter after U.S. gross sales of GAZYVA
within any consecutive 12 month period have reached $500.0 million. The Second GAZYVA Threshold Date can
be achieved regardless of whether GAZYVA has been approved in a non-CLL indication.

Our share of RITUXAN pre-tax profits in the U.S. decreased to 39% from 40% as GAZYVA was approved by the 

FDA in follicular lymphoma in February 2016.

In addition, should the FDA approve an anti-CD20 product other than OCREVUS or GAZYVA that is acquired or 
developed by Genentech and subject to the collaboration agreement, our share of the co-promotion operating profits
would be between 30% and 38% based on certain events.

F- 54

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

GAZYVA Profit Share

Our current pretax profit-sharing formula for GAZYVA provides for a 35% share on the first $50.0 million of 

operating profits earned each calendar year. Our share of annual profits in excess of $50.0 million varies, as 
summarized in the table below, upon the following events:

Until First GAZYVA Threshold Date ........................................................................................

After First GAZYVA Threshold Date until Second GAZYVA Threshold Date .................................

After Second GAZYVA Threshold Date ...................................................................................

39.0%

37.5%

35.0%

In 2016, 2015 and 2014, our share of operating losses on GAZYVA was 35%.

Revenues from Anti-CD20 Therapeutic Programs

Revenues from anti-CD20 therapeutic programs are summarized as follows:

(In millions)
Biogen's share of pre-tax profits in the U.S. for RITUXAN and
GAZYVA, including the reimbursement of selling and
development expenses ........................................................ $
Revenue on sales in the rest of world for RITUXAN.................

Total revenues from anti-CD20 therapeutic programs ....... $

2016

2015

2014

1,249.5 $
65.0
1,314.5 $

1,269.8 $
69.4
1,339.2 $

1,117.1
78.3
1,195.4

In 2016 the 39% profit-sharing threshold was met during the first quarter. In 2015 and 2014, the 40% profit-

sharing threshold was met during the first quarter.

Prior to regulatory approval, we record our share of the expenses incurred by the collaboration for the

development of anti-CD20 products in research and development expense in our consolidated statements of 
income. After an anti-CD20 product is approved, we record our share of the development expenses related to that 
product as a reduction of our share of pre-tax profits in revenues from anti-CD20 therapeutic programs. 

Acorda

In 2009 we entered into a collaboration and license agreement with Acorda Therapeutics, Inc. (Acorda) to 
develop and commercialize products containing fampridine in markets outside the U.S, including FAMPYRA. We also 
have responsibility for regulatory activities and the future clinical development of related products in those markets.

Under the terms of the collaboration and license agreement, we pay Acorda tiered royalties based on the level

of ex-U.S. net sales. We may pay up to $375.0 million of additional milestone payments to Acorda based on the
successful achievement of certain regulatory and commercial milestones. The next expected milestone would be 
$15.0 million, due if ex-U.S. net sales reach $100.0 million over a period of four consecutive quarters. We will 
capitalize these additional milestones as intangible assets upon achievement of the milestone which will then be 
amortized utilizing an economic consumption model and recognized as amortization of acquired intangible assets. 
Royalty payments are recognized as a cost of goods sold.

In connection with the collaboration and license agreement, we have also entered into a supply agreement with 

Acorda for the commercial supply of FAMPYRA. This agreement is a sublicense arrangement of an existing
agreement between Acorda and Alkermes, who acquired Elan Drug Technologies, the original party to the license with
Acorda. During the years ending December 31, 2016, 2015 and 2014, total cost of sales related to royalties and 
commercial supply of FAMPRYA reflected in our consolidated statements of income were $31.5 million, $30.6 million 
and $29.2 million, respectively.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

AbbVie

We have a collaboration agreement with 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 the
E.U. in July 2016. We made milestone payments totaling $32.0 million related to these approvals, which were 
capitalized as intangible assets, net in our consolidated balance sheets. 

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.

We are responsible for manufacturing and research and development activities in both the Collaboration 

Territory and outside the Collaboration Territory and will record these activities within their respective lines in our 
consolidated statements of income, net of any reimbursement of research and development expenditures received
from AbbVie. For the years ended December 31, 2016, 2015 and 2014, the collaboration incurred $48.6 million, 
$113.8 million and $117.8 million for research and development activities, for which we recognized $24.3 million,
$60.8 million and $67.4 million, respectively, in our consolidated statements of income. During 2015 we made 
milestone payments of $16.0 million for the development of ZINBRYTA as a result of filing for regulatory approval in
the U.S. and E.U. during the year. These payments were recorded as research and development expense in our 
consolidated statements of income. 

Prior to regulatory approval, we also recognized $22.0 million of pre-commercialization expenses within our 

selling, general and administrative expense, which represents 50% of the collaboration's pre-commercialization
costs for 2016. After ZINBRYTA was approved by the FDA and EMA in 2016, we began to recognize our share of the
collaboration activities within the U.S., E.U. and Canadian territories as described below.

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 consolidated statements of income. The 
collaboration began selling ZINBRYTA in the U.S. in the third quarter of 2016. For the year ended December 31, 
2016, we recognized a net reduction in revenue of $21.9 million to reflect our share of an overall net loss within the
collaboration.

The following table provides a summary of the U.S. collaboration and our share of the co-promotion losses on 

ZINBRYTA in the U.S.:

For the Year Ended
December 31,

(In millions)
Product revenues, net ............................................................................................................. $
Costs and expenses ...............................................................................................................

2016

Co-promotion losses in the U.S................................................................................................ $
Biogen's share of co-promotion losses in the U.S. .................................................................... $

6.1
50.0
43.9
21.9

In the E.U. and Canada, we recognize revenues on sales to third parties in product revenues, net in our 
consolidated statements of income. We also record the related cost of revenues and sales and marketing expenses
to their respective line items in our consolidated statements of income as these 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 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 year ended December 31,
2016, we recognized income of $4.9 million to reflect AbbVie's 50% sharing of the net collaboration losses in the
E.U. and Canada. 

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Swedish Orphan Biovitrum AB (publ)

In January 2007 we acquired 100% of the stock of Syntonix. Syntonix, now known as Bioverativ Therapeutics
Inc. (formerly Biogen Hemophilia Inc.), had previously entered into a collaboration agreement with Swedish Orphan
Biovitrum AB (publ) (Sobi) to jointly develop and commercialize Factor VIII and Factor IX hemophilia products, 
including ELOCTATE and ALPROLIX. Under an amended and restated collaboration agreement, we have commercial
rights for North America (the Biogen North America Territory) and for rest of the world markets outside of the Sobi 
Territory, as defined below (the Biogen Direct Territory). Subject to the exercise of an option right that Sobi controls, 
Sobi has commercial rights in substantially all of Europe, Russia and certain countries in Northern Africa and the
Middle East (the Sobi Territory). The collaboration agreement was amended and restated in April 2014. (References 
to the collaboration agreement refer to the amended and restated collaboration agreement).

In November 2014 Sobi exercised its option to assume final development and commercialization activities in 

the Sobi Territory for ELOCTA (the trade name for ELOCTATE in the E.U.). In July 2015 Sobi exercised its option to
assume final development and commercialization of ALPROLIX in the Sobi Territory. Upon each exercise of opt-in right 
under the terms of the collaboration agreement, Sobi made a $10.0 million payment in escrow.

ELOCTA was approved by the EC in November 2015 and Sobi had its first commercial sale of ELOCTA in 

January 2016. In March 2016 the EC approved the transfer of the marketing authorization for ELOCTA in the E.U.
from Biogen to Sobi, making Sobi the marketing authorization holder of ELOCTA in the E.U. As the marketing 
authorization holder, Sobi assumes full legal responsibility for ELOCTA, from a regulatory perspective, during its
entire life cycle in the E.U. As of December 31, 2016, approximately $144.0 million in expenditures for ELOCTA, net 
of the $10.0 million escrow payment and other royalty adjustments as described in the table and its footnote (3)
below, are reimbursable by Sobi under the collaboration agreement due to its election to assume final development 
and commercialization of ELOCTA within the Sobi Territory, which is the Opt-In Consideration for ELOCTA. This
reimbursement will be recognized by us as royalty revenue in proportion to collaboration revenues, over a ten-year 
period, consistent with the initial patent term of the product.

ALPROLIX was approved in the E.U. by the EC in May 2016 and Sobi had its first commercial sale in June 
2016. In September 2016 the EC approved the transfer of the marketing authorization for ALPROLIX in the E.U. from
Biogen to Sobi, making Sobi the marketing authorization holder of ALPROLIX in the E.U. As the marketing 
authorization holder, Sobi assumes full legal responsibility for ALPROLIX, from a regulatory perspective, during its 
entire life cycle in the E.U. As of December 31, 2016, approximately $123.0 million in expenditures for ALPROLIX,
net of the $10.0 million escrow payment and other royalty adjustments as described in the table and its footnote (3) 
below, are reimbursable to us by Sobi under the collaboration agreement due to Sobi's election to assume final 
development and commercialization of ALPROLIX in the Sobi Territory, which is the Opt-In Consideration for 
ALPROLIX. This reimbursement will be recognized by us as royalty revenue in proportion to collaboration revenues, 
over a ten-year period, consistent with the initial patent term of the product.

The Opt-In Consideration for each product will be paid by Sobi using a cross-royalty cash payment structure for 

sales in each company’s respective territories as an adjustment to the Base Rate in the table below. Under the 
collaboration agreement, cash payments are as follows:

Royalty and Net Revenue Share Rates:
Sobi rate to Biogen on net sales in the Sobi Territory

Biogen rate to Sobi on net sales in the Biogen North
America Territory
Biogen rate to Sobi on net sales in the Biogen Direct
Territory

Biogen rate to Sobi on net revenue(1)
from the Biogen Distributor Territory(2)

Method

Royalty

Royalty

Royalty
Net
Revenue
Share

Rates post Sobi Opt-In(3)

Base Rate following
1st commercial sale in
the Sobi Territory:

12%

12%

17%

50%

Rate during the
Reimbursement
Period:
Base Rate
plus 5%
Base Rate
less 5%
Base Rate
less 5%

Base Rate
less 15%

(1) Net revenue represents Biogen’s pre-tax receipts from third-party distributors, less expenses incurred by Biogen in the 

conduct of commercialization activities supporting the distributor activities.

(2) The Biogen Distributor Territory represents Biogen territories where sales are derived utilizing a third-party distributor.

F- 57

 
BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(3) A credit will be issued to Sobi against its reimbursement of the Opt-in Consideration for each product in an amount equal to 
the difference in the rate paid by Biogen to Sobi on sales in the Biogen territories for certain periods prior to the first 
commercial sale in the Sobi Territory versus the rate that otherwise would have been payable on such sales.

We are recording revenue at the effective royalty rate expected over the term of the agreement of approximately 

14% and recording cost of sales at the effective royalty rate expected over the term of the agreement of 
approximately 11%.

If the reimbursement of the Opt-in Consideration has not been achieved within six years of the first commercial
sale of such product, we maintain the right to require Sobi to pay any remaining balances due to us within 90 days of 
the six-year anniversary date of the first commercial sale.

Following the spin-off of our hemophilia business, this collaboration agreement with Sobi will continue with

Bioverativ, an independent public company. For additional information about the spin-off, please see Note 1, 
Summary of Significant Accounting Policies and Note 26, Subsequent Events to these consolidated financial
statements.

Ionis Pharmaceuticals, Inc.

Long-Term Strategic Research Collaboration

In September 2013 we entered into a six-year research collaboration with Ionis, formerly known as Isis

Pharmaceuticals Inc. under which both companies collaborate to perform discovery level research and then develop 
and commercialize antisense or other therapeutics for the treatment of neurological disorders. Under the 
collaboration, Ionis will perform research on a set of neurological targets identified within the agreement. Once the 
research has reached a specific stage of development, we will make the determination whether antisense is the 
preferred approach to develop a therapeutic candidate or whether another modality is preferred. If antisense is 
selected, Ionis will continue development and identify a product candidate. If another modality is used, we will 
assume the responsibility for identifying a product candidate and developing it.

Under the terms of this agreement, we paid Ionis an upfront amount of $100.0 million. Of this payment, we
recorded prepaid research and discovery services of approximately $25.0 million, representing the value of the Ionis 
full time equivalent employee resources which are required by the collaboration to provide research and discovery 
services to us over the term. The remaining $75.0 million of the upfront payment was recorded as research and
development expense as it represented the purchase of intellectual property that had not reached technological
feasibility.

Ionis is also eligible to receive milestone payments, license fees and royalty payments for all product
candidates developed through this collaboration, with the specific amount dependent upon the modality of the
product candidate advanced by us. During the years ending December 31, 2016, 2015 and 2014, we triggered
milestones of $5.5 million, $20.0 million and $20.0 million, respectively, related to the advancement of IONIS-
SOD1Rx for the treatment of ALS and other neurological targets identified.

For non-ALS antisense product candidates, Ionis will be responsible for global development through the 
completion of a Phase 2 trial and we will provide advice on the clinical trial design and regulatory strategy. For ALS
antisense product candidates, we are responsible for global development, clinical trial design and regulatory 
strategy. We have an option to license a product candidate until completion of the Phase 2 trial. If we exercise our 
option, we will pay Ionis up to a $70.0 million license fee and assume global development, regulatory and 
commercialization responsibilities. Ionis could receive additional milestone payments upon the achievement of 
certain regulatory milestones of up to $130.0 million, plus additional amounts related to the cost of clinical trials 
conducted by Ionis under the collaboration, and royalties on future sales if we successfully develop the product
candidate after option exercise.   

For product candidates using a different modality, we will be responsible for global development through all 
stages and will pay Ionis up to $90.0 million upon the achievement of certain regulatory milestones and royalties on 
future sales if we successfully develop the product candidate.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Product Collaborations 

In 2012 we entered into three separate exclusive worldwide option and collaboration agreements with Ionis 

under which both companies will develop and commercialize SPINRAZA (nusinersen) for the treatment of SMA, 
antisense therapeutics for up to three gene targets and IONIS-DMPKRX for the treatment of myotonic dystrophy type 1 
(DM1), respectively.

SPINRAZA (nusinersen)

In January 2012 we entered into an exclusive worldwide option and collaboration agreement with Ionis under 
which both companies will develop and commercialize the antisense investigational drug candidate, SPINRAZA, for 
the treatment of SMA. Under the terms of this agreement, we paid Ionis $29.0 million as an upfront payment. During 
2014 we amended the agreement to adjust the amount of potential additional payments and terms of the exercise 
of our opt-in right to license SPINRAZA, which included providing for additional opt-in scenarios, based on the filing or 
acceptance of a new drug application (NDA) or marketing authorization application with the FDA or EMA. Consistent 
with the initial agreement, Ionis remained responsible for conducting the pivotal/Phase 3 trials and we provided
input on the clinical trial design and regulatory strategy for the development of SPINRAZA.

During 2016, 2015 and 2014, we triggered clinical trial payments of $35.3 million, $42.8 million and $57.3

million, respectively, related to the advancement of the program.

In August 2016 we and Ionis announced that SPINRAZA met the primary endpoint for the interim analysis of 

the Phase 3 trial evaluating SPINRAZA in infantile-onset SMA. In November 2016 we and Ionis announced that
SPINRAZA met the primary endpoint for the interim analysis of the Phase 3 trial evaluating SPINRAZA in later-onset
SMA. 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 consolidated statements of income. In December 2016 SPINRAZA was approved by 
the FDA for the treatment of SMA in pediatric and adult patients in the U.S. During the fourth quarter of 2016 we 
accrued a $60.0 million milestone payment due to Ionis for the approval of SPINRAZA in the U.S. This amount was 
capitalized in intangible assets, net in our consolidated balance sheets.

During the years ending December 31, 2016, 2015 and 2014, $257.8 million, $74.9 million and $27.7 million, 

respectively, were reflected in research and development expense in our consolidated statements of income related 
to the advancement of the program.

We may pay Ionis up to approximately $90.0 million in additional milestone payments upon the achievement of 

certain regulatory milestones as well as a royalty rate in the mid-teens on future sales of SPINRAZA.

Antisense Therapeutics

Under the terms of the December 2012 agreement relating to the development and commercialization of up to 

three gene targets we provided Ionis with an upfront payment of $30.0 million and agreed to make potential
additional payments, prior to licensing, of up to $10.0 million based on the development of the selected product 
candidate as well as a mark-up of the cost estimate of the Phase 1 and Phase 2 trials. During 2015 we triggered a 
$10.0 million milestone payment. Ionis will be responsible for global development of any product candidate through
the completion of a Phase 2 trial and we will provide advice on the clinical trial design and regulatory strategy. We 
have an option to license the product candidate until completion of the Phase 2 trial. If we exercise our option, we
will pay Ionis up to a $70.0 million license fee and assume global development, regulatory and commercialization
responsibilities. Ionis could receive up to another $130.0 million in milestone payments upon the achievement of 
certain regulatory milestones as well as royalties on future sales if we successfully develop the product candidate
after option exercise.

IONIS-DMPKRx

Under the terms of the June 2012 agreement for the DM1 candidate, we provided Ionis with an upfront 

payment of $12.0 million and agreed to make potential additional payments, prior to licensing, of up to $59.0 million 
based on the development of the selected product candidate. During 2015 we amended the agreement to adjust the 
amount of potential additional payments by an additional $4.2 million due to changes in the clinical trial design. 

F- 59

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

During 2016 we terminated the development of the IONIS-DMPKRx product candidate to treat DM1 and returned

the product to Ionis. During the years ending December 31, 2016, 2015 and 2014, $3.1 million, $9.0 million and 
$10.9 million, respectively, were reflected in research and development expense in our consolidated statements of 
income. 

Eisai Co., Ltd. 

BAN2401 and E2609 Collaboration

In March 2014 we entered into a collaboration agreement with Eisai Co., Ltd. (Eisai) (Eisai Collaboration 
Agreement) to jointly develop and commercialize two Eisai product candidates for the treatment of Alzheimer’s
disease, BAN2401, a monoclonal antibody that targets amyloid-beta aggregates, and E2609, a BACE inhibitor. Under 
the Eisai Collaboration Agreement, Eisai serves as the global operational and regulatory lead for both compounds
and all costs, including research, development, sales and marketing expenses, will be shared equally by us and
Eisai. Following marketing approval in major markets, such as the U.S., the E.U. and Japan, we will co-promote 
BAN2401 and E2609 with Eisai and share profits equally. In smaller markets, Eisai will distribute these products 
and pay us a royalty. The Eisai Collaboration Agreement also provides the parties with certain rights and obligations 
in the event of a change in control of either party.

The Eisai Collaboration Agreement also provides Eisai an option to jointly develop and commercialize

aducanumab, our anti-amyloid beta antibody candidate for Alzheimer’s disease (Aducanumab Option) and an option
to jointly develop and commercialize one of our anti-tau monoclonal antibodies (Anti-Tau Option). Upon exercise of 
each of the Aducanumab Option and the Anti-Tau Option, we will execute a separate collaboration agreement with
Eisai on terms and conditions that mirror the Eisai Collaboration Agreement.

Aducanumab Option

Eisai may exercise the Aducanumab Option after either (i) the Phase 1b clinical trial for aducanumab and the

Phase 2 clinical trial for BAN2401 (Post-Phase 2 Aducanumab Option), or (ii) completion of the Phase 3 clinical trial 
for aducanumab (Post-Phase 3 Aducanumab Option) under certain conditions.

The consideration we will receive if Eisai exercises the Post-Phase 2 Aducanumab Option depends on the 
development status of BAN2401. If BAN2401 is then determined to advance to Phase 3, we will be entitled to
receive a single payment from Eisai upon regulatory approval of aducanumab and we will no longer be required to
pay Eisai any milestone payments for products containing BAN2401 under the Eisai Collaboration Agreement. If the
development of BAN2401 has instead been terminated, we will receive development and commercial milestone
payments from Eisai (Post-Phase 2 Aducanumab Milestone Payments). If Eisai does not exercise its Post-Phase 2 
Aducanumab Option, we may elect to terminate the Eisai Collaboration Agreement with respect to BAN2401 but,
under certain conditions, will have the option to reinstate the Eisai Collaboration Agreement after completion of a
BAN2401 Phase 3 clinical trial.

If Eisai exercises its Post-Phase 3 Aducanumab Option, Eisai will be required to pay us all Phase 3
development and commercialization costs plus a mark-up and an amount equal to any unpaid Post-Phase 2
Aducanumab Milestone Payments that would have been payable if Eisai had exercised its Post-Phase 2 Aducanumab
Option. 

Anti-Tau Option

Eisai may exercise the Anti-Tau Option after completion of the Phase 1 clinical trial of such anti-tau monoclonal 

antibody. If Eisai exercises its Anti-Tau Option, we will receive an upfront payment from Eisai and will be entitled to
additional development and commercial milestone payments.

Upon the effective date of the Eisai Collaboration Agreement, we paid Eisai $100.0 million and recorded $17.7

million, reflecting the fair value of the options granted under the Eisai Collaboration Agreement, both of which were 
classified as research and development expense in our consolidated statements of income. During the second
quarter of 2014 Eisai exercised its option under the Eisai Collaboration Agreement to expand the joint development 
and commercialization activities to include Japan. Upon such exercise, we paid Eisai an additional $35.0 million, and 
recorded $21.6 million as research and development expense in our consolidated statements of income, which 
represented the difference between the payment made upon exercise of the option and the fair value of that option
recorded as research and development expense upon closing of the agreement in the first quarter of 2014. During
the fourth quarter of 2016 we recognized a $50.0 million milestone payment related to the initiation of a phase 3

F- 60

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

trial for E2609, which is included in research and development expense in our consolidated statements of income. 
We could pay Eisai up to an additional $1.0 billion under the Eisai Collaboration Agreement based on the future 
achievement of certain development, regulatory and commercial milestones.

In addition to our arrangements with Eisai, Neurimmune is entitled to milestone and royalty payments related to 

the development and commercialization of aducanumab and certain anti-tau antibodies. For additional information 
regarding our agreement with Neurimmune, please see Note 18, Investments in Variable Interest Entities to these 
consolidated financial statements.

A summary of activity related to our collaboration with Eisai is as follows:

(In millions)
Total development expense incurred by the collaboration............ $
Biogen’s share of development expense, excluding upfront and
milestone payments, reflected in our consolidated statements of
income.................................................................................... $

Applied Genetic Technologies Corporation

For the Years Ended
December 31,

2016

2015

2014

95.1 $

84.1 $

57.5

50.5 $

40.4 $

29.1

In July 2015 we announced a collaboration and license agreement to develop gene-based therapies for 
multiple ophthalmic diseases with Applied Genetic Technologies Corporation (AGTC). The collaboration will focus on 
the development of a portfolio of AGTC’s therapeutic programs, including both a clinical-stage candidate for X-linked
Retinoschisis (XLRS) and a pre-clinical candidate for the treatment of X-Linked Retinitis Pigmentosa (XLRP). The
agreement also includes options for early stage discovery programs in two ophthalmic diseases and one non-
ophthalmic condition, as well as an equity investment in AGTC.

During the third quarter of 2015 we made an upfront payment of $124.0 million, which included a $30.0
million equity investment in AGTC, prepaid research and development expenditures of $58.4 million and total
licensing and other fees of $35.6 million. The $58.4 million of prepaid research and development expenditures were 
recorded in investments and other assets in our consolidated balance sheets and will be expensed as the services 
are provided. During 2015 we recorded $54.5 million as research and development expense associated with AGTC 
in our consolidated statements of income, including the $35.6 million total licensing and other fees, $6.5 million in
research and development services, a $7.5 million premium on our equity investment and a $5.0 million clinical
development milestone related to XLRS. During 2016 we recorded $26.5 million in research and development 
services in research and development expense in our consolidated statements of income.

AGTC is eligible to receive development, regulatory and commercial milestone payments aggregating in excess
of $1.1 billion, which includes up to $472.5 million collectively for the two lead programs and up to $592.5 million
across the discovery programs. AGTC is also eligible to receive royalties in the mid-single digit to mid-teen 
percentages of annual net sales. 

We were granted worldwide commercialization rights for the XLRS and XLRP programs. AGTC has an option to

share development costs and profits after the initial clinical trial data are available, and an option to co-promote the 
second of these products to be approved in the U.S. AGTC will lead the clinical development programs of XLRS 
through product approval and of XLRP through the completion of first-in-human trials. We will support the clinical 
development costs, subject to certain conditions, following the first-in-human study for XLRS and IND-enabling 
studies for XLRP. Under the manufacturing license, we have received an exclusive license to use AGTC’s proprietary 
technology platform to make AAV vectors for up to six genes, three of which are in AGTC’s discretion, in exchange for 
payment of milestones and royalties.

PP

University of Pennsylvania

In May 2016 we entered into a collaboration and alliance with the University of Pennsylvania (UPenn) to
advance gene therapy and gene editing technologies. The collaboration will primarily focus on the development of 
therapeutic approaches that target the eye, skeletal muscle and the central nervous system. The alliance is also
expected to focus on the research and validation of next-generation gene transfer technology using adeno-
associated virus gene delivery vectors and exploring the expanded use of genome editing technology as a potential 
therapeutic platform.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

During the second quarter of 2016 we paid Penn an upfront fee of $20.0 million, which was recorded as 

research and development expense in our consolidated statements of income, and prepaid research and 
development expenditures of $15.0 million, which was recorded in investments and other assets in our consolidated 
balance sheets. We also expect to fund an additional $47.5 million in the aggregate in research and development 
costs extending over the next three to five years in seven preclinical research and development programs, as well as
the exploration of genome-editing technology.

If all of the collaborations programs are successful and we exercise all of our options under the Penn
collaboration and alliance, we may be required to make future payments of over $2.0 billion in research funding, 
options and milestone payments, in addition to royalties payable on net sales of products.

Sangamo BioSciences, Inc.

In February 2014 we completed an exclusive worldwide research, development and commercialization 
collaboration and license agreement with Sangamo under which both companies will develop and commercialize 
product candidates for the treatment of two inherited blood disorders, sickle cell disease and beta-thalassemia. The
collaboration is currently in the research stage of development.

Under the terms of the agreement, we paid Sangamo an upfront payment of $20.0 million in cash, with

additional payments of up to approximately $300.0 million based on the achievement of certain development,
regulatory and commercial milestones, plus royalties based on sales. We recorded the $20.0 million upfront 
payment as research and development expense in our consolidated statements of income. Under this arrangement,
Sangamo will be responsible for identifying a product candidate for the treatment of beta-thalassemia and advancing
that candidate through a completed Phase 1 human clinical trial, at which point we would assume responsibility for 
development. We will jointly develop a sickle cell disease candidate through the potential filing of an investigative 
new drug application, after which we would assume clinical responsibilities. We will lead the global development and
commercialization efforts and Sangamo will have the option to assume co-promotion responsibilities in the U.S.

During the years ending December 31, 2016, 2015 and 2014, $13.4 million, $13.6 million and $28.9 million, 

respectively, of expense was reflected in our consolidated statements of income.

Following the spin-off of our hemophilia business, this collaboration and license agreement with Sangamo will 
continue with Bioverativ, an independent public company. For additional information about the spin-off, please see 
Note 1, Summary of Significant Accounting Policies and Note 26, Subsequent Events to these consolidated financial 
statements.

Mitsubishi Tanabe Pharma Corporation

In September 2015 we announced an agreement with Mitsubishi Tanabe Pharma Corporation (MTPC) to 
exclusively license amiselimod (MT-1303), a late stage experimental medicine with potential in multiple autoimmune 
indications. Amiselimod is an oral compound that targets the sphingosine 1-phosphate receptor. During the fourth 
quarter of 2015 the agreement became effective and we made an upfront payment of $60.0 million, which was 
recorded as research and development expense in our consolidated statements of income.

During the third quarter of 2016 we discontinued our development of amiselimod. We expect to formally 
terminate the agreement and return the program to MTPC in the first quarter of 2017. We will have no further 
license to or continuing involvement in the development of this compound. For the year ended December 31, 2016, 
$22.8 million was reflected in research and development expense in our consolidated statements of income.

Other Research and Discovery Arrangements 

During the years ended December 31, 2016, 2015 and 2014, we entered into several research, discovery and
other related arrangements that resulted in $10.3 million, $9.7 million and $40.0 million, respectively, recorded as 
research and development expense in our consolidated statements of income.

These additional arrangements include the potential for future milestone payments based on clinical and

commercial development over a period of several years.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Samsung Bioepis

Joint Venture Agreement

In February 2012 we entered into a joint venture agreement with Samsung BioLogics Co. Ltd. (Samsung 

Biologics), establishing an entity, Samsung Bioepis, to develop, manufacture and market biosimilar 
pharmaceuticals. Samsung Biologics contributed 280.5 billion South Korean won (approximately $250.0 million) for 
an 85% stake in Samsung Bioepis and we contributed approximately 49.5 billion South Korean won (approximately 
$45.0 million) for the remaining 15% ownership interest. Under the joint venture agreement, we have no obligation to 
provide any additional funding and our ownership interest may be diluted due to financings in which we do not 
participate. As of December 31, 2016, our ownership interest is approximately 6.5%, 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 and is based on paying for 49.9% of the total investment made by Samsung Biologics into 
Samsung Bioepis in excess of what we have already contributed under the agreement plus a rate that will represent 
their return on capital. If we do not exercise this option by a date in 2018 determined pursuant to the joint venture
agreement, this option will expire and Samsung Biologics will have the right to purchase all of Samsung Bioepis’
shares then held by us.

Samsung Biologics has the power to direct the activities of Samsung Bioepis which will most significantly and
directly impact its economic performance. We account for this investment under the equity method of accounting as
we maintain the ability to exercise significant influence over Samsung Bioepis through a presence on the entity’s
Board of Directors and our contractual relationship. Under the equity method, we recorded our original investment at
cost and subsequently adjust the carrying value of our investment for our share of equity in the entity’s income or 
losses according to our percentage of ownership. 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 consolidated statements of income. During the years ended
December 31, 2015 and 2014, we recognized a loss on our investment of $12.5 million and $15.1 million, 
respectively. 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

In December 2013 pursuant to our rights under the joint venture agreement with Samsung Biologics, we 
entered into an agreement with Samsung Bioepis to commercialize, over a 10-year term, three anti-tumor necrosis
factor (TNF) biosimilar product candidates in Europe and in the case of one anti-TNF biosimilar, Japan. Under the
terms of this agreement, we have made total upfront and clinical development milestone payments of $46.0 million,
all of which have been recorded as research and development expense in our consolidated statements of income as
the programs they relate to had not achieved regulatory approval. We also agreed to make additional milestone
payments of $25.0 million upon regulatory approval in the E.U. for each of the three anti-TNF biosimilar product
candidates. During the year ended December 31, 2016, we paid $50.0 million in milestone payments, which have
been capitalized in intangible assets, net in our consolidated balance sheets as BENEPALI received regulatory 
approval in the E.U. in January 2016 and FLIXABI received regulatory approval in the E.U. in May 2016. In July 2016 
the EMA accepted Samsung Bioepis' MAA for SB5, an adalimumab biosimilar candidate referencing HUMIRA.

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 consolidated statements of income and record the related cost of revenues and sales and
marketing expenses in our 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
sharing with Samsung Bioepis is recognized in collaboration profit (loss) sharing in our consolidated statements of 
income. For the year ended December 31, 2016, we recognized a net expense of $15.1 million related to the
collaboration profit share. 

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

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. Under the terms of the
license agreement, we granted Samsung Bioepis an exclusive license to use, develop, manufacture and
commercialize biosimilar products created by Samsung Bioepis using Biogen product-specific technology. In 
exchange, we will receive single digit royalties on all biosimilar products developed and commercialized by Samsung
Bioepis. Under the terms of the technical development services agreement, we provide Samsung Bioepis technical 
development and technology transfer services, which include, but are not limited to, cell culture development, 
purification process development, formulation development and analytical development. Under the terms of our 
manufacturing agreement, we manufacture clinical and commercial quantities of bulk drug substance of biosimilar 
products for Samsung Bioepis pursuant to contractual terms. Under limited circumstances, we may also supply 
Samsung Bioepis with quantities of drug product of biosimilar products for use in clinical trials through
arrangements with third-party contract manufacturers.

For the years ended December 31, 2016, 2015 and 2014, we recognized $20.2 million, $62.9 million and 
$58.5 million, respectively, in revenues in relation to these services, which is reflected as a component of other 
revenues in our consolidated statements of income.

20. 

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 these consolidated financial 
statements.

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

Forward Pharma German Patent Litigation

On November 18, 2014, Forward Pharma A/S (Forward Pharma) filed suit against us in the Regional Court of 

Düsseldorf, Germany (the German Infringement Litigation) alleging that TECFIDERA infringes German Utility Model
DE 20 2005 022 112 U1 (the utility model), which was issued in April 2014 and expired in October 2015. Forward
Pharma subsequently extended its allegations to assert that TECFIDERA infringes Forward Pharma's European Patent 
No. 2,801,355 (the '355 patent), which was issued in May 2015 and expires in October 2025. We have entered a 
settlement and license agreement with Forward Pharma that will provide us an irrevocable license to all intellectual
property owned by Forward Pharma and result in the termination of the German Infringement Litigation. For more
information on the settlement and license agreement please read Note 21, Commitments and Contingencies to these 
consolidated financial statements.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Italian National Medicines Agency

In the fourth quarter of 2011 Biogen Italia SRL received notice from the Italian National Medicines Agency 

(Agenzia Italiana del Farmaco or AIFA) that sales of TYSABRI after mid-February 2009 exceeded a reimbursement 
limit established pursuant to a Price Determination Resolution (Price Resolution) granted by AIFA in December 2006.
On January 12, 2012, we filed an appeal in the Regional Administrative Tribunal of Lazio (Il Tribunale Amministrativo
Regionale per il Lazio) in Rome, Italy seeking a ruling that the reimbursement limit in the Price Resolution should 
apply as written to only “the first 24 months” of TYSABRI sales, which ended in mid-February 2009. The appeal is 
still pending. In June 2014 AIFA approved a resolution affirming that there is no reimbursement limit from and after 
February 2013. In January 2017 we negotiated an agreement in principle with AIFA's Price and Reimbursement 
Committee to settle all of AIFA's existing claims relating to sales of TYSABRI in excess of the reimbursement limit for 
the periods from February 2009 through January 2013 for an aggregate repayment of EUR37.4 million. The 
agreement is subject to ratification by AIFA.

For additional information regarding this matter, please read Note 17, Other Consolidated Financial Statement 

Detail to these consolidated financial statements.

Qui Tam Litigation

On July 6, 2015, a qui tam action filed on behalf of the United States and certain states were 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.

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.FR. §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.

FF

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.FR. FF
§240.10b-5 and seeks a declaration of the action as a class action and an award of damages, interest and
attorney's 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 multiple sclerosis with 480 mg of dimethyl fumarate as
provided for in our TECFIDERA label. We are awaiting a decision in this matter.

Inter Partes Review 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. We are awaiting a decision in this matter.

On April 18, 2016, Swiss Pharma International AG 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. Swiss Pharma
filed requests for rehearing, which are pending.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

European Patent Office Oppositions

In June 2016 the European Patent Office 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.

Patent Revocation Matter

In December 2015 Swiss Pharma International AG brought an action in the Patents Court of the United 

Kingdom to revoke the UK counterpart of our European Patent Number 1 485 127 (“Administration of agents to treat 
inflammation”) (the '127 patent), which was issued in June 2011 and concerns administration of natalizumab 
(TYSABRI) to treat MS. The patent expires in February 2023. Subsequently, the same entity brought an 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 the '127 patent. In September 2016 we resolved the UK action by agreeing 
to revocation of the UK patent. A hearing has been scheduled in the Dutch action for early 2017 and 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 a civil investigative demand 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.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

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.

21.  Commitments and Contingencies

TECFIDERA Litigation Settlement and License Agreement

In January 2017 we agreed to enter into a settlement and license agreement with Forward Pharma that will
provide us an irrevocable license to all intellectual property owned by Forward Pharma and results in the termination
of the German Infringement Litigation. Under the terms of the settlement and license agreement with Forward
Pharma, we have agreed to pay Forward Pharma $1.25 billion in cash. Under certain circumstances outlined in the
agreement, we will pay Forward Pharma royalties on net sales of our products for the treatment of multiple sclerosis
that are covered by a Forward Pharma patent and have dimethyl fumarate (“DMF”) as an active pharmaceutical
ingredient.

During the fourth quarter of 2016 we recognized a pre-tax charge of $454.8 million related to this matter. This 

amount represents the fair value of estimated royalties on our sales of TECFIDERA during the period April 2014
through December 31, 2016. When the cash payment is made following approval of the settlement and license
agreement, we will recognize assets of $656.3 million and $138.9 million, reflecting the estimated fair value of the 
license acquired that is attributable to the U.S. and E.U., respectively. If Forward Pharma does not receive a patent in
either the Interference Proceeding pending in the U.S. or the pending European Opposition Proceeding (which
proceedings are defined in the settlement and license agreement), we would likely recognize an immediate
impairment charge equal to the value of the license that is attributable to that jurisdiction as additional litigation
expense and we would not be obligated to pay Forward Pharma royalties in such jurisdiction. If Forward Pharma 
receives a patent in either the U.S. Interference Proceeding or the E.U. Opposition Proceeding, we would amortize 
the assets related to a license of intellectual property in the related jurisdiction utilizing an economic consumption
model and we may be obligated to royalties on a country by country basis in Europe and other ex-U.S. markets.

For additional information with respect to the terms of this agreement, including potential royalties payable, 

please read the 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 which is filed as Exhibit 
10.41 to this 2016 Form 10-K. For additional information related to the ongoing Interference Proceeding with 
Forward Pharma in the U.S. or the European Office Opposition in the E.U., please read Note 20, Litigation to these 
consolidated financial statements.

TYSABRI Contingent Payments

In 2013 we acquired from 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 consolidated statements of 
income. Elan was acquired by Perrigo Company plc (Perrigo) in December 2013. Following that acquisition, we began 
making these royalty payments to Perrigo.

Contingent Consideration related to Business Combinations

In connection with our acquisitions of Convergence, Stromedix and Biogen International Neuroscience GmbH

(BIN), we agreed to make additional payments based upon the achievement of certain milestone events.

As the acquisitions of Convergence, Stromedix and BIN, formerly Panima Pharmaceuticals AG, 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. For additional information related to our acquisition of Convergence please read Note 2,
Acquisitions, to these consolidated financial statements.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Fumapharm AG

In 2006 we acquired Fumapharm AG. As part of this acquisition we acquired FUMADERM and TECFIDERA 
(together, Fumapharm Products). We paid $220.0 million upon closing of the transaction and agreed to pay an 
additional $15.0 million if a Fumapharm Product was approved for MS in the U.S. or E.U. In the second quarter of 
2013 we paid this $15.0 million contingent payment as TECFIDERA was approved in the U.S. for MS by the FDA. We 
are also required to make additional 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 twelve month period, as defined in the acquisition agreement.

During 2016 we paid $1.2 billion in contingent payments as we reached the $7.0 billion, $8.0 billion, $9.0 
billion and $10.0 billion cumulative sales levels related to the Fumapharm Products in the fourth quarter of 2015
and the first, second and third quarters of 2016, respectively, and accrued $300.0 million upon reaching $11.0 
billion in total cumulative sales of Fumapharm Products in the fourth quarter of 2016.

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 shall 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 will be accounted for as an increase to
goodwill as incurred, in accordance with the accounting standard applicable to business combinations when we
acquired Fumapharm. Any portion of the payment which 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 December 31, 2016, we could make potential future milestone 
payments to third parties of up to approximately $3.1 billion, including approximately $0.5 billion in development
milestones, approximately $0.8 billion in regulatory milestones and approximately $1.8 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 December 31, 2016, 
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 successful achievement of 
certain development, regulatory approval and commercial milestones. 

Other Funding Commitments

As of December 31, 2016, we have several on-going 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 have recorded accrued expenses of approximately $21.0 million 
on our consolidated balance sheet for expenditures incurred by CROs as of December 31, 2016. We have 
approximately $500.0 million in cancellable future commitments based on existing CRO contracts as of 
December 31, 2016.

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 
December 31, 2016, we have approximately $47.8 million of net liabilities associated with uncertain tax positions.

Solothurn, Switzerland Facility

On December 1, 2015, we purchased land in Solothurn, Switzerland where we are building a biologics
manufacturing facility over the next several years. As of December 31, 2016, we had contractual commitments of 
$176.3 million for the construction of this facility.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Leases

We rent laboratory and office space and certain equipment under non-cancelable operating leases. These 

lease agreements contain various clauses for renewal at our option and, in certain cases, escalation clauses 
typically linked to rates of inflation. Rental expense under these leases, net of amounts recognized in relation to
exiting our manufacturing facility in Cambridge, Massachusetts and our Weston, Massachusetts facility, which 
terminate at various dates through 2028, amounted to $68.7 million, $68.6 million and $62.4 million in 2016, 
2015 and 2014, respectively. In addition to rent, the leases may require us to pay additional amounts for taxes, 
insurance, maintenance and other operating expenses.

As of December 31, 2016, minimum rental commitments under non-cancelable leases, net of income from

subleases, for each of the next five years and total thereafter were as follows:

(In millions)
Minimum lease payments........... $
Less: income from subleases (1)

Net minimum lease
payments ............................ $

2017

2018

2019

2020

2021

Thereafter

Total

75.3 $
(8.9)

69.8 $
(15.2)

69.1 $
(15.5)

65.7 $
(15.7)

64.6 $ 331.9 $ 676.4
(126.9)
(55.4)
(16.2)

66.4 $

54.6 $

53.6 $

50.0 $

48.4 $ 276.5 $ 549.5

(1)  Represents sublease income expected to be received for the vacated manufacturing facility in Cambridge, MA, the vacated 
portion of our Weston, Massachusetts facility and other facilities throughout the world. For additional information related to 
the sublease of the vacated manufacturing facility in Cambridge, MA, please read Note 3, Restructuring, Business
Transformation and Other Cost Savings Initiatives to these consolidated financial statements.

Under certain of our lease agreements, we are contractually obligated to return leased space to its original 
condition upon termination of the lease agreement. At the inception of a lease with such conditions, we record an
asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value 
of the obligation. In subsequent periods, for each such lease, we record interest expense to accrete the asset 
retirement obligation liability to full value and depreciate each capitalized asset retirement obligation asset, both 
over the term of the associated lease agreement. Our asset retirement obligations were not significant as of 
December 31, 2016 or 2015.

Eisai Financing Arrangement

During 2015 we amended our existing lease related to Eisai's oral solid dose products manufacturing facility in 

PP

RTP, North Carolina where we manufacture our and Eisai's oral solid dose products. For additional information, 
please read Note 10, Property, Plant and Equipment to these consolidated financial statements. As of December 31, 
2016, the net present values of the future minimum lease payments were as follows:

t

(In millions)

2017 ........................................................................................................................ $
2018 ........................................................................................................................
Total .............................................................................................................................
Less: interest ..............................................................................................................
Net present value of the future minimum lease payments ................................................. $

As of December 31, 2016
2.0
16.7
18.7
(0.6)
18.1

22.    Guarantees

As of December 31, 2016 and 2015, we did not have significant liabilities recorded for guarantees.

We enter into indemnification provisions under our agreements with other companies in the ordinary course of 

business, typically with business partners, contractors, clinical sites and customers. Under these provisions, we 
generally indemnify and hold harmless the indemnified party for losses suffered or incurred by the indemnified party 
as a result of our activities. These indemnification provisions generally survive termination of the underlying
agreement. The maximum potential amount of future payments we could be required to make under these 
indemnification provisions is unlimited. However, to date we have not incurred material costs to defend lawsuits or 
settle claims related to these indemnification provisions. As a result, the estimated fair value of these agreements 
is minimal. Accordingly, we have no liabilities recorded for these agreements as of December 31, 2016 and 2015.

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BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

23.    Employee Benefit Plans

We sponsor various retirement and pension plans. Our estimates of liabilities and expenses for these plans 
incorporate a number of assumptions, including expected rates of return on plan assets and interest rates used to
discount future benefits.

401(k) Savings Plan

We maintain a 401(k) Savings Plan, which is available to substantially all regular employees in the U.S. over the 

age of 21. Participants may make voluntary contributions. We make matching contributions according to the 401(k) 
Savings Plan’s matching formula. All matching contributions and participant contributions vest immediately. The 401
(k) Savings Plan also holds certain transition contributions on behalf of participants who previously participated in 
the Biogen, Inc. Retirement Plan. The expense related to our 401(k) Savings Plan primarily consists of our matching
contributions.

Expense related to our 401(k) Savings Plan totaled $45.2 million, $51.8 million and $49.3 million for the years

ended December 31, 2016, 2015 and 2014, respectively.

Deferred Compensation Plan

We maintain a non-qualified deferred compensation plan, known as the Supplemental Savings Plan (SSP),
which allows a select group of management employees in the U.S. to defer a portion of their compensation. The SSP
also provides certain credits to highly compensated U.S. employees, which are paid by the company. These credits 
are known as the Restoration Match. The deferred compensation amounts are accrued when earned. Such deferred 
compensation is distributable in cash in accordance with the rules of the SSP. Deferred compensation amounts
under such plan as of December 31, 2016 and 2015, totaled approximately $128.5 million and $126.9 million, 
respectively, and are included in other long-term liabilities in our consolidated balance sheets. The SSP also holds 
certain transition contributions on behalf of participants who previously participated in the Biogen, Inc. Retirement
Plan. The Restoration Match and participant contributions vest immediately. Distributions to participants can be
either in one lump sum payment or annual installments as elected by the participants.

PP

Pension Plans

Our retiree benefit plans include defined benefit plans for employees in our affiliates in Switzerland and 
Germany as well as other insignificant defined benefit plans in certain other countries in which we maintain an
operating presence.

Our Swiss plan is a government-mandated retirement fund that provides employees with a minimum investment
return. The minimum investment return is determined annually by the Swiss government and was 1.25% in 2016 and 
1.75% in 2015 and 2014, respectively. Under the Swiss plan, both we and certain of our employees with annual 
earnings in excess of government determined amounts are required to make contributions into a fund managed by 
an independent investment fiduciary. Employer contributions must be in an amount at least equal to the employee’s 
contribution. Minimum employee contributions are based on the respective employee’s age, salary and gender. As of 
December 31, 2016 and 2015, the Swiss plan had an unfunded net pension obligation of approximately $39.1
million and $42.4 million, respectively, and plan assets which totaled approximately $68.6 million and $63.9 million,
respectively. In 2016, 2015 and 2014, we recognized expense totaling $15.3 million, $12.9 million and $9.8 million,
respectively, related to our Swiss plan.

The obligations under the German plans are unfunded and totaled $35.4 million and $27.6 million as of 

December 31, 2016 and 2015, respectively. Net periodic pension cost related to the German plans totaled $4.2
million, $4.0 million and $3.5 million for the years ended December 31, 2016, 2015 and 2014, respectively.

F- 70

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

24.    Segment Information

We operate as one operating segment, which is discovering, developing, manufacturing and delivering therapies

to people living with serious neurological, rare and autoimmune diseases. Our Chief Executive Officer (CEO), as the
chief operating decision-maker, manages and allocates resources to the operations of our company on a total
company basis. Our research and development organization is responsible for the research and discovery of new 
product candidates and supports development and registration efforts for potential future products. Our 
pharmaceutical, operations and technology organization manages the development of the manufacturing processes, 
clinical trial supply, commercial product supply, distribution, buildings and facilities. Our commercial organization is 
responsible for U.S. and international development of our commercial products. The company is also supported by 
corporate staff functions. Managing and allocating resources on a total company basis enables our CEO to assess
the overall level of resources available and how to best deploy these resources across functions, therapeutic areas,
and research and development projects that are in line with our long-term company-wide strategic goals. Consistent
with this decision-making process, our CEO uses consolidated, single-segment financial information for purposes of 
evaluating performance, forecasting future period financial results, allocating resources and setting incentive targets.

Enterprise-wide disclosures about product revenues, other revenues and long-lived assets by geographic area

and information relating to major customers are presented below. Revenues are primarily attributed to individual 
countries based on location of the customer or licensee.

Revenue by product is summarized as follows:

(In millions)

Multiple Sclerosis (MS):

United
States

2016

Rest of
World

Total

For the Years Ended December 31,
2015
Rest of
World

United
States

Total

United
States

2014
Rest of
World

Total

TECFIDERA................. $ 3,169.4 $
AVONEX .....................
PLEGRIDY ..................
TYSABRI ....................
FAMPYRA ...................

1,675.3
305.0
1,182.9
—

798.7 $ 3,968.1 $ 2,908.2 $
638.2
176.7
780.9
84.9

1,790.2
227.1
1,103.1
—

2,313.5
481.7
1,963.8
84.9

730.2 $ 3,638.4 $ 2,426.6 $
840.0
111.4
783.0
89.7

1,956.7
27.8
1,025.1
—

2,630.2
338.5
1,886.1
89.7

ZINBRYTA...................

—

7.8

7.8

—

—

—

—

Hemophilia:

ELOCTATE ..................
ALPROLIX ...................
Other product revenues:

FUMADERM................
SPINRAZA ..................
BENEPALI...................

FLIXABI ......................

445.2
268.0

—
4.6
—

—

68.0
65.7

45.9
—
100.6

0.1

513.2
333.7

45.9
4.6
100.6

0.1

308.3
208.9

—
—
—

—

11.4
25.6

51.4
—
—

—

319.7
234.5

51.4
—
—

—

58.4
72.1

—
—
—

—

482.6 $ 2,909.2
3,013.1
44.5
1,959.5
80.2

1,056.4
16.7
934.4
80.2

—

—
3.9

62.5
—
—

—

—

58.4
76.0

62.5
—
—
—

Total product
revenues ................. $ 7,050.4 $ 2,767.5 $ 9,817.9 $ 6,545.8 $ 2,642.7 $ 9,188.5 $ 5,566.7 $ 2,636.7 $ 8,203.4

F- 71

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Geographic Information

The following tables contain certain financial information by geographic area:

Europe(1)

U.S.

December 31, 2016 (In millions)
Product revenues from external
customers .................................... $ 7,050.4 $ 1,533.5 $
Revenues from anti-CD20
therapeutic programs .................... $ 1,249.5 $
Other revenues from external
customers .................................... $
70.0 $
Long-lived assets .......................... $ 1,272.3 $ 1,219.3 $

224.7 $

1.9 $

Europe(1)

U.S.

December 31, 2015 (In millions)
Product revenues from external
customers .................................... $ 6,545.8 $ 1,497.6 $
Revenues from anti-CD20
therapeutic programs .................... $ 1,269.8 $
Other revenues from external
customers .................................... $
142.0 $
Long-lived assets .......................... $ 1,296.5 $

29.6 $
879.4 $

3.5 $

Europe(1)

U.S.

December 31, 2014 (In millions)
Product revenues from external
customers .................................... $ 5,566.7 $ 1,383.9 $
Revenues from anti-CD20
therapeutic programs .................... $ 1,117.1 $
Other revenues from external
customers .................................... $
212.6 $
Long-lived assets .......................... $ 1,055.5 $

31.6 $
701.9 $

7.7 $

Germany

Asia

Other

Total

703.7 $

217.3 $

313.0 $ 9,817.9

— $

— $

63.1 $ 1,314.5

1.5 $
1.8 $

20.2 $
7.0 $

316.4
— $
1.4 $ 2,501.8

Germany

Asia

Other

Total

668.1 $

143.7 $

333.3 $ 9,188.5

— $

— $

65.9 $ 1,339.2

1.6 $
2.3 $

62.9 $
7.7 $

— $

236.1
1.7 $ 2,187.6

Germany

Asia

Other

Total

811.8 $

112.8 $

328.2 $ 8,203.4

— $

— $

70.6 $ 1,195.4

1.8 $
2.5 $

58.5 $
2.6 $

— $

304.5
3.2 $ 1,765.7

(1)  Represents amounts related to Europe less those attributable to Germany.

Revenues from Anti-CD20 Therapeutic Programs

Approximately 11%, 12% and 12% of our total revenues in 2016, 2015 and 2014, respectively, are derived from 

our collaboration agreement with Genentech. For additional information related to our collaboration with Genentech,
please read Note 19, Collaborative and Other Relationships to these consolidated financial statements.

Significant Customers

We recorded revenue from two wholesalers accounting for 35% and 22% of gross product revenues in 2016,

34% and 26% of gross product revenues in 2015, and 33% and 27% of gross product revenues in 2014,
respectively.

Other

As of December 31, 2016, 2015 and 2014, approximately $643.6 million, $684.9 million and $676.0 million,

respectively, of our long-lived assets were related to our manufacturing facilities in Denmark. 

As of December 31, 2016 and 2015, approximately $545.5 million and $161.5 million, respectively, of our 

long-lived assets were related to the construction of a biologics manufacturing facility in Solothurn, Switzerland.

For additional information related to our manufacturing facility in Solothurn, Switzerland, please read Note 10, 

Property, plant and equipment to these consolidated financial statements.

t

F- 72

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

25.    Quarterly Financial Data (Unaudited)

(In millions, except per share amounts)
2016
Product revenues, net.............................. $
Revenues from anti-CD20 therapeutic
programs ................................................ $
Other revenues ....................................... $
Total revenues ........................................ $
Gross profit (1) ....................................... $
Net income ............................................. $
Net income attributable to Biogen Inc. ...... $
Net income per share:

Basic earnings per share attributable to
Biogen Inc. ........................................... $
Diluted earnings per share attributable
to Biogen Inc. ....................................... $

Weighted-average shares used in
calculating:

Basic earnings per share attributable to
Biogen Inc. ...........................................
Diluted earnings per share attributable
to Biogen Inc. .......................................

(In millions, except per share amounts)
2015
Product revenues, net.............................. $
Revenues from anti-CD20 therapeutic
programs ................................................ $
Other revenues ....................................... $
Total revenues ........................................ $
Gross profit (1) ....................................... $
Net income ............................................. $
Net income attributable to Biogen Inc. ...... $
Net income per share:

Basic earnings per share attributable to
Biogen Inc. ........................................... $
Diluted earnings per share attributable
to Biogen Inc. ....................................... $

Weighted-average shares used in
calculating:

Basic earnings per share attributable to
Biogen Inc. ...........................................
Diluted earnings per share attributable
to Biogen Inc. .......................................

First
Quarter

Second
Quarter

Third
Quarter

(a)
2,309.4 $

(b)
2,466.0 $ 2,539.6 $

(b) (c)

Fourth
Quarter

(b) (d) (e)

Total
Year

2,502.9 $

9,817.9

329.5 $
87.9 $
2,726.8 $
2,413.8 $
969.2 $
970.9 $

349.2 $
79.0 $

317.6 $
98.6 $
2,894.2 $ 2,955.8 $
2,523.9 $ 2,538.9 $
1,048.4 $ 1,030.2 $
1,049.8 $ 1,032.9 $

318.2 $
50.9 $

1,314.5
316.4
2,872.0 $ 11,448.8
9,970.1
2,493.5 $
3,695.7
647.9 $
3,702.8
649.2 $

4.44 $

4.79 $

4.72 $

3.00 $

16.96

4.43 $

4.79 $

4.71 $

2.99 $

16.93

218.9

219.3

219.1

218.9

219.4

219.4

216.6

217.0

218.4

218.8

First
Quarter

Second
Quarter

Third
Quarter

(f) (g)

2,172.3 $

2,198.6 $ 2,391.7 $

Fourth
Quarter

Total
Year

(a) (h)
2,425.9 $

9,188.5

330.6 $
52.0 $
2,555.0 $
2,242.6 $
820.2 $
822.5 $

337.5 $
55.6 $

337.2 $
49.0 $
2,591.6 $ 2,777.9 $
2,305.5 $ 2,467.9 $
924.8 $ 1,019.5 $
965.6 $
927.3 $

333.9 $
79.5 $

1,339.2
236.1
2,839.3 $ 10,763.8
9,523.4
2,507.5 $
3,593.2
828.7 $
3,547.0
831.6 $

3.50 $

3.94 $

4.16 $

3.77 $

15.38

3.49 $

3.93 $

4.15 $

3.77 $

15.34

235.0

235.6

235.3

232.2

235.7

232.6

220.4

220.8

230.7

231.2

(1) Gross profit is calculated as total revenues less cost of sales, excluding amortization of acquired intangible assets.

(a)  Net income and net income attributable to Biogen Inc., for the first quarter of 2016 and the fourth quarter of 

2015, includes pre-tax restructuring charges totaling $9.7 million and $93.4 million, respectively related to the 
2015 corporate restructuring program.

F- 73

BIOGEN INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(b)  Net income and net income attributable to Biogen Inc. for the second, third and fourth quarters of 2016
includes pre-tax additional depreciation expense totaling $15.8 million, $15.7 million and $14.0 million, 
respectively, as part of our determination to cease manufacturing in our small-scale biologics manufacturing
facility in Cambridge, MA as well as vacate our warehouse space in Somerville, MA. Our departure from these
facilities has shortened the expected useful lives of certain leasehold improvements and other assets at these
facilities.

(c)  Net income and net income attributable to Biogen Inc. for the third quarter of 2016 includes a pre-tax charge to 
research and development expense of $75.0 million for a license fee paid to Ionis as we exercised our option 
to develop and commercialize SPINRAZA.

(d)  Net income and net income attributable to Biogen Inc. for the fourth quarter of 2016 includes a pre-tax charge 
to research and development expense of $50.0 million for a milestone payment due to Eisai related to the 
initiation of a phase 3 trial for E2609.

(e)  Net income and net income attributable to Biogen Inc. for the fourth quarter of 2016 includes a pre-tax charge 

of $454.8 million related to the January 2017 settlement and license agreement with Forward Pharma.

(f)  Net income and net income attributable to Biogen Inc. for the third quarter of 2015 includes a pre-tax charge to 
research and development expense of $48.1 million recorded upon entering into the collaboration agreement
with AGTC.

(g)  Net income attributable to Biogen Inc. for the third quarter of 2015 reflects the attribution of a $60.0 million 
charge to noncontrolling interests, net of tax, related to a milestone payment due Neurimmune upon the
enrollment of the first patient in a Phase 3 trial for aducanumab.

(h)  Net income and net income attributable to Biogen Inc. for the fourth quarter of 2015 includes a pre-tax charge 
to research and development expense of $60.0 million recorded upon entering into the collaboration agreement
with MTPC.

26.    Subsequent Events

On February 1, 2017, we completed the distribution of the issued and outstanding common stock of Bioverativ

to Biogen stockholders. For additional information related to the distribution of Bioverativ, please read Note 1, 
Summary of Significant Accounting Policies, to these consolidated financial statements.

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
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 (including under the manufacturing and supply agreement pursuant to which we will 
manufacture and supply certain products and materials to Bioverativ).

F- 74

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of Biogen Inc.

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of income, 
comprehensive income, equity and cash flows present fairly, in all material respects, the financial position of Biogen 
Inc. and its subsidiaries  at December 31, 2016 and December 31, 2015, and the results of their operations and 
their cash flows for each of the three years in the period ended December 31, 2016 in conformity with accounting 
principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all
material respects, effective internal control over financial reporting as of December 31, 2016, based on criteria
established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations
of the Treadway Commission  (COSO).The Company's  management is responsible for these financial statements, for 
maintaining effective internal control over financial reporting and for its assessment  of the effectiveness of internal
control over financial reporting, included in Management's  Report on Internal Control over Financial Reporting under 
item 9A. Our responsibility is to express opinions on these financial statements and on the Company's internal 
control over financial reporting based on our integrated audits. We conducted our audits in accordance with the
standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan
and perform the audits to obtain reasonable assurance about whether the financial statements are free of material
misstatement and whether effective internal control over financial reporting was maintained in all material respects.
Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and 
disclosures in the financial statements, assessing the accounting principles used and significant estimates made by 
management, and evaluating the overall financial statement presentation. Our audit of internal control over financial 
reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a
material weakness exists, and testing and evaluating the design and operating effectiveness of internal control 
based on the assessed risk. Our audits also included performing such other procedures as we considered 
necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

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

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

/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
February 2, 2017

F- 75

Exhibit No.
2.1†

2.2

3.1

3.2

3.3

4.1

4.2

4.3

4.4

4.5

10.1

10.2†

10.3

10.4†

10.5†

10.6*

10.7*

10.8*

10.9*

10.10*

EXHIBIT INDEX

Description

p

Asset Purchase Agreement among Biogen Idec International Holding Ltd., Elan Pharma
International Limited and Elan Pharmaceuticals, Inc., dated as of February 5, 2013. Filed 
as Exhibit 2.1 to our Current Report on Form 8-K/A filed on February 12, 2013.
Separation Agreement between Biogen Inc. and Bioverativ Inc. Filed as Exhibit 2.1 to our 
Current Report on Form 8-K filed on February 2, 2017.

Amended and Restated Certificate of Incorporation, as amended. Filed as Exhibit 3.1 to
our Quarterly Report on Form 10-Q for the quarter ended June 30, 2012.

Certificate of Amendment to the Certificate of Incorporation. Filed as Exhibit 3.1 to our 
Current Report on Form 8-K filed on March 27, 2015.

Third Amended and Restated Bylaws. Filed as Exhibit 3.2 to our Current Report on Form 
8-K filed on March 27, 2015.

Reference is made to Exhibit 3.1 for a description of the rights, preferences and privileges 
of our Series A Preferred Stock and Series X Junior Participating Preferred Stock.

Indenture between Biogen Idec and The Bank of New York Trust Company, N.A. dated as 
of February 26, 2008. Filed as Exhibit 4.1 to our Registration Statement on Form S-3 (File 
No. 333-149379).

First  Supplemental  Indenture  between  Biogen  Idec  and  The  Bank  of  New  York  Trust
Company, N.A. dated as of March 4, 2008. Filed as Exhibit 4.1 to our Current Report on
Form 8-K filed on March 4, 2008.

Indenture,  dated  September  15,  2015,  between  Biogen  Inc.  and  U.S.  Bank  National
Association. Filed as Exhibit 4.1 to our Current Report on Form 8-K filed on September 
16, 2015.

First Supplemental Indenture, dated September 15, 2015, between Biogen Inc. and U.S.
Bank National Association. Filed as Exhibit 4.2 to our Current Report on Form 8-K filed on 
September 16, 2015.
Credit Agreement, dated August 28, 2015, between Biogen Inc., Bank of America, N.A., 
as administrative agent, swing line lender and an L/C issuer, and the other lenders party 
thereto. Filed as Exhibit 10.1 to our Current Report on Form 8-K filed on September 1,
2015.

Expression Technology Agreement between Biogen Idec and Genentech. Inc. dated March
16, 1995. Filed as an exhibit to Biogen Idec’s Quarterly Report on Form 10-Q for the quarter 
ended March 31, 1995.

Letter Agreement between Biogen Idec and Genentech, Inc. dated May 21, 1996. Filed as
Exhibit 10.1 to our Current Report on Form 8-K filed on June 6, 1996.

Second  Amended  and  Restated  Collaboration  Agreement  between  Biogen  Idec  and
Genentech, Inc. dated as of October 18, 2010. Filed as Exhibit 10.5 to our Annual Report 
on Form 10-K for the year ended December 31, 2010.

Letter agreement regarding GA101 financial terms between Biogen Idec and Genentech,
Inc. dated October 18, 2010. Filed as Exhibit 10.6 to our Annual Report on Form 10-K for 
the year ended December 31, 2010.

Biogen Idec Inc. 2008 Amended and Restated Omnibus Equity Plan. Filed as Exhibit 10.1 
to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2014.
Form  of performance  unit award agreement under the Biogen Idec Inc. 2008 Omnibus
Equity Plan. Filed as Exhibit 10.2 to our Quarterly Report on Form 10-Q for the quarter 
ended March 31, 2014.

Form of market stock unit award agreement under the Biogen Idec Inc. 2008 Omnibus 
Equity Plan. Filed as Exhibit 10.3 to our Quarterly Report on Form 10-Q for the quarter 
ended March 31, 2014.
Form of restricted stock unit award agreement under the Biogen Idec Inc. 2008 Omnibus
Equity Plan. Filed as Exhibit 10.1 to our Current Report on Form 8-K filed on August 1,
2008.
Form  of  nonqualified  stock  option  award  agreement  under  the  Biogen  Idec  Inc.  2008
Omnibus Equity Plan. Filed as Exhibit 10.2 to our Current Report on Form 8-K filed on
August 1, 2008.

A- 1

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Exhibit No.
10.11*

10.12*

10.13*

10.14*

10.15*

10.16*

10.17*

10.18*

10.19*

10.20*

10.21*

10.22*

10.23*

10.24*

10.25*

10.26*

10.27*

10.28*

10.29*

10.30*

10.31*

10.32*

Description
p
Form  of cash-settled performance  shares award agreement under the Biogen Idec Inc. 
2008 Omnibus Equity Plan. Filed as Exhibit 10.1 to our Quarterly Report on Form 10-Q for 
the quarter ended March 31, 2010.
Form of performance shares award agreement under the Biogen Idec Inc. 2008 Omnibus
Equity Plan. Filed as Exhibit 10.12 to our Annual Report on Form 10-K for the year ended 
December 31, 2013.
Form of market stock unit award agreement under the Biogen Idec Inc. 2008 Omnibus 
Equity Plan. Filed as Exhibit 10.2 to our Quarterly Report on Form 10-Q for the quarter 
ended March 31, 2010.
Biogen Inc. 2006 Non-Employee Directors Equity Plan, as amended. Filed as Exhibit 10.1 
to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2015.

Biogen Idec Inc. 2005 Omnibus Equity Plan. Filed as Appendix A to our Definitive Proxy 
Statement on Schedule 14A filed on April 15, 2005.
Amendment No. 1 to the Biogen Idec Inc. 2005 Omnibus Equity Plan dated April 4, 2006.
Filed as Exhibit 10.1 to our Quarterly Report on Form 10-Q for the quarter ended March
31, 2007.
Amendment No. 2 to the Biogen Idec Inc. 2005 Omnibus Equity Plan dated February 12, 
2007. Filed as Exhibit 10.2 to our Quarterly Report on Form 10-Q for the quarter ended 
March 31, 2007.

Amendment to the Biogen Idec Inc. 2005 Omnibus Equity Plan dated April 18, 2008. Filed 
as Exhibit 10.7 to our Quarterly Report on Form 10-Q for the quarter ended June 30, 2008.
Amendment to Biogen Idec Inc. 2005 Omnibus Equity Plan dated October 13, 2008. Filed 
as Exhibit 10.30 to our Annual Report on Form 10-K for the year ended December 31, 
2008.
Biogen Inc. 2015 Employee Stock Purchase Plan. Filed as Appendix A to Biogen's Definitive 
Proxy Statement on Schedule 14A filed on April 30, 2015.

Biogen Idec Inc. 2008 Performance-Based Management Incentive Plan. Filed as Appendix 
B to Biogen Idec’s Definitive Proxy Statement on Schedule 14A filed on May 8, 2008.

Voluntary Executive Supplemental Savings Plan, as amended and restated effective January 
1, 2004. Filed as Exhibit 10.13 to our Annual Report on Form 10-K for the year ended
December 31, 2003.
Supplemental Savings Plan, as amended. Filed as Exhibit 10.23 to our Annual Report on
Form 10-K for the year ended December 31, 2015.
Voluntary  Board  of  Directors  Savings Plan, as  amended.  Filed  as  Exhibit  10.24  to  our 
Annual Report on Form 10-K for the year ended December 31, 2015.

Biogen Idec Inc. Executive Severance Policy — U.S. Executive Vice President, as amended
effective January 1, 2014. Filed as Exhibit 10.39 to our Annual Report on Form 10-K for 
the year ended December 31, 2013.

Biogen Idec Inc. Executive Severance Policy — International Executive Vice President, as
amended effective January 1, 2014. Filed as Exhibit 10.40 Annual Report on Form 10-K 
for the year ended December 31, 2013.
Biogen Idec Inc. Executive Severance Policy — U.S. Senior Vice President, as amended
effective October 13, 2008. Filed as Exhibit 10.53 to our Annual Report on Form 10-K for 
the year ended December 31, 2008.

Biogen  Idec  Inc.  Executive  Severance  Policy  —  International  Senior  Vice  President, as 
amended effective October 13, 2008. Filed as Exhibit 10.54 to our Annual Report on Form
10-K for the year ended December 31, 2008.

Annual Retainer Summary for Board of Directors. Filed as Exhibit 10.1 to our Quarterly 
Report on Form 10-Q for the quarter ended September 30, 2014.

Form of indemnification agreement for directors and executive officers. Filed as Exhibit 
10.1 to our Current Report on Form 8-K filed on June 7, 2011.
Employment  Agreement  between  Biogen  Idec  and  George  A.  Scangos  amended  as  of 
August 23, 2013. Filed as Exhibit 10.1 to our Current Report on Form 8-K filed on August 
26, 2013.
Letter regarding employment arrangement of Paul J. Clancy dated August 17, 2007. Filed 
as Exhibit 10.49 to our Annual Report on Form 10-K for the year ended December 31, 
2007.

A- 2

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Exhibit No.
10.33*

10.34*

10.35*

10.36*

10.37*

10.38*

10.39*

10.40*

10.41

21+
23+
31.1+

31.2+

32.1++

101++

Description
p
Employment Agreement between Biogen Inc. and Michel Vounatsos dated December 18, 
2016. Filed as Exhibit 10.1 to our Current Report on Form 8-K filed on December 19, 2016.
Letter regarding employment arrangement of Kenneth DiPietro dated December 12, 2011. 
Filed as Exhibit 10.49 to our Annual Report on Form 10-K for the year ended December 31, 
2012.
Letter regarding employment arrangement of Alfred Sandrock dated May 7, 2013. Filed as 
Exhibit 10.1 to our Quarterly Report on Form 10-Q for the quarter ended June 30, 2013.
Letter regarding employment arrangement of Alfred Sandrock dated October 19, 2015. Filed
as Exhibit 10.37 to our Annual Report on Form 10-K for the year ended December 31, 2015.
Letter regarding employment arrangement of Susan Alexander dated December 13, 2005. 
Filed as Exhibit 10.58 to our Annual Report on Form 10-K for the year ended December 31, 
2009.
Letter regarding employment arrangement of Adriana Karaboutis dated August 7, 2014. 
Filed as Exhibit 10.44 to our Annual Report on Form 10-K for the year ended December 31, 
2014.
Letter regarding employment arrangement of John Cox dated May 19, 2016. Filed as Exhibit 
10.1 to our Quarterly Report on Form 10-Q for the quarter ended June 30, 2016. 
Letter regarding separation arrangement of Tony Kingsley dated November 12, 2015. Filed 
as Exhibit 10.42 to our Annual Report on Form 10-K for the year ended December 31, 2015.
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.
Subsidiaries. 
Consent of PricewaterhouseCoopers LLP, an Independent Registered Public Accounting Firm.

Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley 
Act of 2002.

Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley 
Act of 2002.

Certification of the Chief Executive Officer and the Chief Financial Officer pursuant to Section 
906 of the Sarbanes-Oxley Act of 2002.
The following materials from Biogen Inc.’s Annual Report on Form 10-K for the year ended 
December 31, 2016, formatted in XBRL (Extensible Business Reporting Language): (i) the 
Consolidated Statements of Income, (ii) the Consolidated Statements of Comprehensive
Income, (iii) the Consolidated Balance Sheets, (iv) the Consolidated Statements of Cash
Flows, (v) the Consolidated Statements of Equity and (vi) Notes to Consolidated Financial 
Statements.

^

*

†

+

References  to  “our”  filings  mean  filings  made  by  Biogen  Inc.  and  filings  made  by  IDEC  Pharmaceuticals 
Corporation prior to the merger with Biogen, Inc. Unless otherwise indicated exhibits were previously filed with
the Securities and Exchange Commission under Commission File Number 0-19311 and are incorporated herein 
by reference.

Management contract or compensatory plan or arrangement.

Confidential treatment has been granted or requested with respect to portions of this exhibit.

Filed herewith.

+ +

Furnished herewith.

A- 3

  
  
  
  
  
  
  
  
CORPORATE INFORMATION

Board of Directors

Stelios Papadopoulos, Ph.D.
Chairman, Biogen
Chairman, Exelixis, Inc. and 
Regulus Therapeutics, Inc.

Michel Vounatsos
Chief Executive Officer, Biogen

Alexander J. Denner, Ph.D.
Founding Partner, Sarissa Capital

Shareholder Information

Corporate Headquarters 
Biogen Inc.
225 Binney Street 
Cambridge, MA 02142 
Phone: (617) 679-2000

SEC Form 10-K
A copy of Biogen’s Annual 
Report on Form 10-K filed with 
the Securities and Exchange 
Commission is available at sec.gov 
and upon request to:

Investor Relations Department 
Biogen Inc.
225 Binney Street
Cambridge, MA 02142
Phone: (781) 464-2442

Common Stock Price

Caroline D. Dorsa
Retired Executive Vice President 
and Chief Financial Officer, 
Public Service Enterprise Group, 
Incorporated 

Richard C. Mulligan, Ph.D.
Portfolio Manager, Icahn Capital 
LP and Mallinckrodt Professor 
of Genetics, Emeritus, Harvard 
Medical School 

Nancy L. Leaming
Retired Chief Executive Officer and 
President, Tufts Health Plan

Robert W. Pangia
Partner, Ivy Capital Partners, LLC

Brian S. Posner
President, Point Rider Group LLC 
and Private Investor

Eric K. Rowinsky, M.D.
President and Executive Chairman, 
RGenix, Inc.

The Honorable Lynn Schenk
Attorney, Former Chief of Staff 
to the Governor of California 
and Former U.S. Congresswoman

Stephen A. Sherwin, M.D.
Clinical Professor of Medicine,
University of California, San 
Francisco, and advisor to life 
sciences companies

Transfer Agent
To keep your contact information 
current and for shareholder 
questions regarding lost stock 
certificates, address changes and 
changes of ownership or names in 
which the shares are held, direct 
inquiries to:

Computershare Trust
Company NA
250 Royall Street
Canton, MA 02021
Phone: (781) 575-2879 
computershare.com

Independent Account 
PricewaterhouseCoopers LLP 
101 Seaport Boulevard 
Boston, MA 02210

Market Information
Our common stock trades on 
the NASDAQ Global Select Market 
under the symbol “BIIB.”

The table below shows the 
high and low sales price for our 
common stock as reported by the 
NASDAQ Global Select Market for 
each quarter in the years ended 
December 31, 2016 and 2015.

News Releases
As a service to our shareholders 
and prospective investors, copies 
of Biogen news releases issued 
in the last 12 months are now 
available almost immediately 24 
hours a day, seven days a week, 
on the Web at businesswire.com. 
Biogen’s news releases are usually 
posted within one hour of being 
issued and are available at no cost 
at biogen.com.

HIGH          

LOW 

HIGH          

LOW 

   Q1  

$301.02 

$242.07

   Q1  

$480.18 

$334.40

2016

   Q2  

$292.69 

$223.02

2015

   Q2  

$432.88 

$368.88

   Q3  

$333.65 

$240.07

   Q3  

$412.24 

$265.00

   Q4  

$329.83 

$268.00

   Q4  

$311.65 

$254.00

About the Cover

Kernen and Braeden, siblings who both have spinal muscular atrophy (SMA). In 2016, Biogen launched the 

fi rst and only treatment for SMA in the US and today is working to bring the therapy to patients worldwide.

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BIOGEN FORWARD

225 Binney Street, Cambridge, MA 02142

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