Quarterlytics / Healthcare / Drug Manufacturers - General / Amgen

Amgen

amgn · NASDAQ Healthcare
Claim this profile
Ticker amgn
Exchange NASDAQ
Sector Healthcare
Industry Drug Manufacturers - General
Employees 10,000+
← All annual reports
FY2023 Annual Report · Amgen
Sign in to download
Loading PDF…
LETTER TO

SHAREHOLDERS
2023

resulting in 15% volume growth, partially offset by a 
3% decline in net selling price. Eighteen medicines2  
generated record sales in 2023, and nine had sales 
exceeding $1 billion. Product sales outside the U.S. 
were approximately $7.6 billion in 2023, up 8%, with 
especially strong growth coming from the Asia-
Pacific region. We invested $4.8 billion in research 
and development in 2023, an increase of 8% from 
the prior year, to advance the broadest and deepest 
pipeline in our history.

Amgen delivered total shareholder return of 13% in 
2023 and 232% over the past ten years, ahead of 
our peer set in both time frames. We increased our 
dividend per share by 10% in 2023 over 2022, the 
twelfth consecutive year of dividend increases.

Our performance last year included $954 million 
in sales3 associated with our acquisition of Horizon 
Therapeutics plc (Horizon), a leading provider of 
medicines to treat rare inflammatory diseases, 
which Amgen completed on October 6, 2023, for 
approximately $27.8 billion. I will say more below 
about the medicines we acquired in this transaction. 
Broadly, the acquisition reflects our ongoing 
commitment to pursuing the best innovation, inside 
our own labs and beyond. Over time, roughly half our 
sales have come from medicines discovered and 
developed internally, with the other half coming from 
therapies that we have sourced externally.  

FOUR THERAPEUTIC PILLARS OF GROWTH
Today, our portfolio is balanced across four 
therapeutic pillars of growth: General Medicine, 
Oncology, Inflammation, and now Rare Disease. In 
each pillar, we have numerous well-established 
medicines currently on the market around the world; 
new innovative treatments advancing through our 
pipeline; and biosimilars, either marketed or planned, 
that deliver savings to healthcare systems. Our 
success is not overly reliant on any one product or 
therapeutic area, and our presence in roughly 100 
countries around the world gives us geographic 
balance as well. 

Robert A. Bradway 
Chairman and Chief Executive Officer
Amgen Inc.

TO MY FELLOW
SHAREHOLDERS

Amgen performed well in 2023, serving millions 
of patients around the world with our innovative, 
life-changing medicines; advancing many 
promising new first-in-class molecules in our 
pipeline; completing a significant acquisition that 
establishes us as a leader in treating rare diseases; 
and delivering strong financial performance. Our 
achievements last year favorably position Amgen  
to generate attractive growth through the end of  
the decade and beyond.

Total revenues in 2023 increased 7% from the prior 
year to $28.2 billion, with non-GAAP earnings per 
share1 rising 5% to $18.65. Demand for our medicines 
from patients and physicians was strong in 2023, 

Furthermore, at a time of intense pressure on drug 
pricing worldwide — which we don’t expect to go 
away — we’ve built a portfolio that is designed to 
deliver growth through volume increases.

2

$28.2B

$18.65

$4.8B

49.8%

2023 Total Revenues

Non-GAAP  
Earnings Per Share1

GAAP Research and  
Development Investment

Non-GAAP  
Operating Margin1, 4

General Medicine

In our General Medicine business, sales of our 
cholesterol treatment Repatha® rose 26% from the 
prior year to $1.6 billion, with sales of our osteoporosis 
medicines EVENITY® and Prolia® increasing 47% to  
$1.2 billion and 12% to $4.0 billion, respectively.

In our pipeline for General Medicine, we are rapidly 
advancing potentially differentiated, early-stage 
treatments for obesity, the furthest along of which, 
maridebart cafraglutide, is currently being studied in 
a Phase 2 clinical trial. In a Phase 1 trial, maridebart 
cafraglutide demonstrated rapid, substantial, and 
sustained weight loss when administered monthly. 
It is estimated that more than 650 million people 
worldwide live with obesity, a complex disease with 
multiple underlying causes. Given the complexity of 
the disease, we believe that a variety of medicines 
will ultimately be needed to treat this patient 
population effectively. 

Olpasiran is another promising new medicine  
in our General Medicine pipeline. Phase 2 data 
released in 2022 showed reductions in lipoprotein(a) 
— a type of “bad” cholesterol that is genetically 
determined and cannot be modified by diet or 
exercise — of as much as 95% in patients with 
established cardiovascular disease. We have  
rapidly enrolled thousands of patients around the 
world in a Phase 3 cardiovascular-outcomes trial  
for olpasiran, underscoring the medical  
community’s strong interest in this medicine.

Oncology

Our Oncology business delivered sales of  
$9.2 billion in 2023. Sales of BLINCYTO®, a treatment 
for acute lymphoblastic leukemia, rose 48% in 2023  

1

2

3

4

Non-GAAP financial measure. See reconciliations to U.S. generally accepted 
accounting principles (GAAP) accompanying this letter.

Includes product sales for the full year 2023 from UPLIZNA®, KRYSTEXXA®, and  
RAVICTI® in connection with the Horizon acquisition.

Product sales between October 6, 2023, and December 31, 2023.

Non-GAAP operating margin is calculated as a percentage of product sales.

to $861 million. Sales of KYPROLIS® for multiple 
myeloma and Vectibix® for colorectal cancer grew 
13% to $1.4 billion and 10% to $984 million, respectively, 
in 2023.

In our Oncology pipeline, Amgen was granted three 
Breakthrough Therapy Designations by the U.S. 
Food and Drug Administration (FDA) last year: for 
tarlatamab in small cell lung cancer; for BLINCYTO 
in early-stage acute lymphoblastic leukemia, and 
for LUMAKRAS®/LUMYKRAS™ in combination with 
Vectibix in colorectal cancer. The FDA is scheduled 
to complete its reviews of tarlatamab and BLINCYTO 
this year. New treatment options are very much 
needed for all three of these diseases. For example, 
there have been no new treatments for small cell 
lung cancer for decades, and the disease today has 
a five-year survival rate of just 3%.

Elsewhere in our Oncology pipeline, we are studying 
bemarituzumab for gastric cancer, which is the 
fifth-leading cause of cancer death worldwide and 
particularly prevalent in the Asia-Pacific region; and 
xaluritamig for prostate cancer, which is the second-
leading cause of cancer death in American men.

Today Amgen offers high-quality biosimilars to some 
of the most-prescribed cancer treatments in the 
world, including MVASI® (a biosimilar to Avastin®7), 
KANJINTI® (a biosimilar to Herceptin®7), and RIABNI® 
(a biosimilar to RITUXAN®7). These three medicines 
together generated $1.1 billion in 2023 sales. Our 
Oncology pipeline includes a biosimilar to OPDIVO®,7 
one of the largest-selling cancer medicines in history.

ON THE COVER: Qui Huat Hee is a senior scientist 
at Amgen’s biomanufacturing facility in Singapore. 
This state-of-the-art facility produces the same 
quantity of medicines as a conventional plant 
but is 75% smaller, giving it a significantly reduced 
environmental footprint.

3

2023 Letter to Shareholders | Inflammation

Amgen has been a leader in treating 

inflammatory diseases for decades. Sales in 2023 of 
TEZSPIRE®, a treatment for severe asthma, increased 
more than threefold in its second year on the market 
to $567 million. We are also studying TEZSPIRE in 
Phase 3 trials for chronic rhinosinusitis with nasal 
polyps and for eosinophilic esophagitis, and in a 
Phase 2 trial for chronic obstructive pulmonary 
disease, which is the world’s third-leading cause  
of death.  

Sales of our psoriasis treatment Otezla® declined 4% 
to $2.2 billion as we faced increased competition 
in the U.S. We expect future growth of Otezla to be 
driven by its well-established safety and efficacy 
profile, approved use in mild-to-moderate psoriasis, 
and ease of administration. 

In our Inflammation pipeline, we anticipate  
Phase 3 data later this year from the first of eight 
trials studying rocatinlimab in moderate-to-severe 
atopic dermatitis in collaboration with our long-time 
partner, Kyowa Kirin Co., Ltd.

Sales of AMJEVITA®/AMGEVITA™, Amgen’s biosimilar to 
HUMIRA®7 that is now available in markets around the 
world, rose 36% in 2023 to $626 million. In the U.S., 

we also offer AVSOLA®, a biosimilar to REMICADE®,7 
and, in 2023, we received U.S. FDA approval for 
WEZLANA™, a biosimilar to STELARA®.7

Rare Disease

In our new Rare Disease business, medicines 
acquired in the Horizon deal discussed above include 
TEPEZZA® for thyroid eye disease, a progressive and 
potentially vision-threatening disease that can 
cause symptoms such as eye bulging and double 
vision; KRYSTEXXA® for uncontrolled gout, which 
can lead to visible lumps under the skin, joint pain 
or stiffness, and damage to joints and bones; and 
UPLIZNA® for neuromyelitis optica spectrum disorder, 
an inflammatory disease that most often affects the 
optic nerves and spinal cord.  

TEPEZZA, KRYSTEXXA, and UPLIZNA are all very 
early in their life cycles and — by leveraging 
Amgen’s extensive global presence, world-class 
biologics capabilities, and extensive experience in 
inflammation — we believe they have the potential to 
reach more patients around the world. Toward that 
end, we are pursuing launches in new geographic 
markets, new indications, and/or new formulations  
to expand the impact of each of these medicines.  

TAVNEOS®, acquired in 2022, treats anti-neutrophil 
cytoplasmic autoantibody (ANCA)-associated 

Overcoming Stereotypes

Raul Lazaro (left) is a researcher at Amgen whose love for science helped 
him to overcome the stereotypes that some might attach to a son of 
migrant workers from Mexico. He now shares his story with young people 
as a volunteer with the Amgen Biotech Experience (ABE), a program that 
uses hands-on experiments to inspire the next generation of innovators.

“In some communities, you’re told that your options are limited,” Lazaro 
says. “You have a picture of a scientist in your head, and they don’t look  
like you. With ABE, I get to show students how working in science can 
change your life.”

Linda Ohlrich, a teacher at Rio Mesa High School in Southern California, 
says, “I have students in my Biology class from a diverse set of
backgrounds, with several from families living below the poverty line.  
Raul was able to show my students that you can work in science 
regardless of where you come from. Put a micropipette in your hand,  
and you never know where it will lead you.”

4

2023 Letter to Shareholders |  
 
 
 
vasculitis, an autoimmune disease that leads to 
the inflammation and eventual destruction of small 
blood vessels in vital organs such as the kidneys. 
Since we completed the acquisition, the number of 
patients who have been prescribed TAVNEOS has 
more than doubled, and we see opportunity for  
continued growth.

In our Rare Disease pipeline, we are currently 
enrolling patients in a Phase 3 clinical trial for 
dazodalibep in Sjögren’s disease, an autoimmune 
disorder in which the immune system attacks the 
glands that make moisture in the eyes, mouth, and 
other parts of the body. We are also enrolling  
Phase 2 trials for fipaxalparant in idiopathic 
pulmonary fibrosis, a condition in which the
lungs become scarred and breathing becomes 
increasingly difficult, and in diffuse cutaneous 
systemic sclerosis, which can cause skin hardening 
and problems in many organs of the body.

We also have two biosimilars in the Rare Disease 
space. Approved in Europe and under regulatory 
review in the U.S., BKEMV™/BEKEMV™ is a biosimilar to 
SOLIRIS®,7 which treats generalized myasthenia gravis, 
a disease that impacts the neuromuscular system. 
Our biosimilar to EYLEA®7 is under regulatory review in 
the U.S. as a treatment for wet age-related macular 
degeneration. 

You can find more information about our approved 
medicines at www.amgen.com/products .5

Restarting the Music

Thomas (above) heard the calling to become 
a musician in 1964 when, as a middle schooler, 
he saw the Beatles perform on The Ed Sullivan 
Show. More than 40 years later, uncontrolled 
gout stole his ability to play guitar when his 
fingers swelled severely from the buildup of uric 
acid crystals. 

“My fingers would lock in place over a chord ... 
you obviously cannot play guitar that way,”  
he says. “I became depressed. I was in a really 
dark place.” 

Thomas’ passion for music returned in full force 
after he began treatment with KRYSTEXXA,  
a medicine designed to break up crystalized 
uric acid deposits. The medicine is now part  
of Amgen’s Rare Disease business following the 
2023 acquisition of Horizon. 

To learn more about our pipeline, please visit  
www.amgenpipeline.com .5 

“I remember the day I got my first treatment: 
September 28, 2022,” he says.

ACCELERATING INNOVATION
At a time when a rapidly aging global population 
needs more innovation, the convergence of “biotech” 
and “tech” is enabling Amgen to innovate with 
greater speed, confidence, and efficiency — an 
incredibly exciting moment for which we have been 
preparing for over a decade. 

In 2012, for example, we had accumulated detailed 
genetic and health information from approximately 
100,000 people, all from Iceland, which has one of the 
world’s most homogenous populations. Today, we 

5

Reference to our website is not intended to function as a hyperlink, and the 
information contained on our website is not intended to be a part of this letter.

Changes in his hands and fingers weren’t 
far behind. The swelling went down. The pain 
subsided. Dexterity returned. The improvement 
was steady, he says, as he continued to receive 
an infusion every two weeks.

“Because KRYSTEXXA makes it possible to play 
again, I can take hold of life once more,” he says. 
“There aren’t adequate words to articulate what 
being able to play guitar again after so long has 
added to my life.”

5

 
 
 
 
Hearing From Patients 
Around the World

In 2023, Amgen celebrated Mission 
Week, giving employees around 
the world the chance to hear 
directly from some of the patients 
we serve. Lorenda, who lives with 

ANCA-associated vasculitis, flew for the first time 
in 25 years, traveling from her home in Alabama to 
Amgen’s headquarters in Southern California.

“Because of the work you do here,” she said, “my 
granddaughters get to know me personally instead 
of someone showing them photos and videos and 
speaking about me in the past tense.”  

Bahija, a patient advocate and leukemia survivor, 
spoke to a gathering of Amgen employees in 
Munich. “Your passion, your dedication, and your 
tireless efforts — it matters,” she said.

More than 10,000 employees around the world either 
attended live or tuned in virtually to a patient panel, 
with nearly 95% saying afterward that the events 
of the week gave them motivation to better serve 
patients and an improved understanding of the 
pressing issues patients face.

Employees celebrated Mission Week at Amgen’s world headquarters  
in Thousand Oaks, CA (above), and in Singapore (below).

6

Ryan (left) is living with acute lymphoblastic leukemia, while Lorenda (right) lives with ANCA-associated vasculitis.

 
have such information from more than  
3 million volunteers from around the  
world — and new technologies are enabling  
us to quickly derive powerful insights from this 
massive amount of data, which help guide our 
research and development work.  

To give another example, in the past, we have built 
biologic medicines using proteins that naturally 
occur in the human body, a process involving  
multiyear cycles in which we engineered and  
tested numerous prototypes before moving a 
single molecule into clinical trials. Nevertheless, 
these protein-based medicines often behaved 
unpredictably, failing to achieve the desired 
outcome or yielding unacceptable side effects. 
Today, using artificial intelligence and machine 
learning, we can design proteins from scratch that 
are more suitable to be made into drugs than those 
found in nature — potentially enabling us to move 
faster and with a higher likelihood of success.

To ensure that we are fully capitalizing on new 
technologies — not just in R&D, but across the  
entire company — we tapped Dr. David Reese  
in late 2023 to become Amgen’s first-ever chief 
technology officer. Dr. Reese, a physician-scientist, 
has been with Amgen for nearly 20 years and has  
led our R&D organization since 2018, spearheading  
the development of the robust pipeline we  
possess today. 

Dr. James “Jay” Bradner is our new head of R&D 
and chief scientific officer. Dr. Bradner is also a 
physician-scientist and a seasoned R&D leader, 
having previously served as president of the Novartis 
Institutes for BioMedical Research. He also has served 
as a faculty member at Harvard Medical School and, 
immediately prior to joining Amgen, was a practicing 
oncologist at the Dana-Farber Cancer Institute.

I’m excited by the work that Dave, Jay, and the rest 
of our team will do together to use technology to 
accelerate innovation at Amgen for the good of 
patients and the long-term growth of our business.

Magdalene is living with cardiovascular disease.

Jürgen (shown above with his wife, Diane) lives with myeloma.

Bahija is a leukemia survivor.

7

2023 Letter to Shareholders |  
SUPPORTING OUR PEOPLE
Technology is only as good as the people who 
use it — and I believe that Amgen’s people are 
the best in the business. We regularly survey our 
employees and they consistently tell us that they 
are passionate about our Mission to serve patients, 
know the Company’s priorities, and understand the 
role they play as individuals in helping Amgen as a 
whole succeed. 

While we are pleased to be named to numerous 
“best” lists — including Forbes magazine’s list of 
“America’s Best Large Employers” and Glassdoor’s 
ranking of the “100 Best Large Places to Work in the 
United States” — we take nothing for granted and 
are always looking for ways to improve.

Last year, for example, in response to feedback 
from employees looking for greater career 
development opportunities, we launched the Talent 
Marketplace, where employees can be matched 
with opportunities at Amgen that best fit their skills 
and interests. Today, more than 9,000 employees 
worldwide are active participants in the Talent 
Marketplace.

INSPIRING THE NEXT GENERATION  
OF INNOVATORS
Having the best employees today is critical, but we 
also want to nurture and inspire the next generation 
of innovators — especially in the wake of learning 
losses due to the COVID-19 pandemic and growing 
societal skepticism about science.

Guided by the belief that everyone needs science 
and science needs everyone, the Amgen Foundation 
has invested nearly $270 million over more than 
30 years to provide best-in-class, no-cost science 
education programs that now reach approximately 
25 million students annually around the world.    

In 2023, the Amgen Foundation announced a new 
investment of more than $12 million to expand the 
Amgen Biotech Experience (ABE), a free science 
education program that has provided nearly a 
million high school students globally with hands-
on biotech experiences. The new funding will be 

Fostering Career 
Development

Like many Amgen employees, Gillian Winstanley 
(above) is innately curious and always looking 
for opportunities to do new things and build new 
skills. So when Amgen launched a new Talent 
Marketplace to match interested employees 
with short-term, project-based opportunities, 
Winstanley was one of the first to give it a try.

“I wanted to learn more aspects of the business 
and how to think strategically and test my 
decision-making skills,” says Winstanley, who 
works in Global Safety for Amgen in Canada 
and has now taken on three projects via the 
Talent Marketplace. “I received a much broader 
view of the organization, expanded my network, 
and learned about functions that I didn’t even 
know existed.”

Amgen launched the Talent Marketplace 
using employee feedback to help people at all 
levels of the organization build and strengthen 
their skills to meet the changing needs of the 
business, and connect with global opportunities 
across the company.

8

 
used to bring ABE to communities in Brazil, Mexico, 
and South Africa, with the goal of reaching an 
additional 180,000 students over the next two years.

Last year, the Amgen Foundation also committed 
over $8 million in new funding to the Amgen 
Scholars Program, an undergraduate summer 
research experience hosted at premier 
educational institutions around the world. More 
than 5,300 students have completed the program 
to date, and this new investment will enable an 
additional 500 students to participate over the next 
two years.

You can learn more about our commitment  
to good corporate citizenship at  
www.amgen.com/responsibility  .6

A FUTURE OF OPPORTUNITY
This is an exciting time to be at Amgen. Thanks to 
the hard work, commitment, and ingenuity of our 
approximately 27,000 employees globally, we are 
well positioned to serve millions more patients 
suffering from some of the world’s most serious 
diseases — and, by so doing, to create significant 
value over the long term for you, our shareholders. 

On behalf of Amgen’s board of directors, our senior 
leadership team, and our employees around the 
world, I thank you for your ongoing support of our 
Company and the important work we do.

Robert A. Bradway 
Chairman and Chief Executive Officer
March 21, 2024

6

7

Reference to our website is not intended to function as a hyperlink, and the 
information contained on our website is not intended to be a part of this letter.

Avastin is a registered trademark of Genentech, Inc.
Herceptin is a registered trademark of Genentech, Inc.
RITUXAN is a registered trademark of Biogen MA Inc. 
OPDIVO is a registered trademark of Bristol-Myers Squibb Company.
HUMIRA is a registered trademark of AbbVie Biotechnology Ltd.
REMICADE is a registered trademark of Janssen Biotech, Inc.
STELARA is a registered trademark of Johnson & Johnson.
SOLIRIS is a registered trademark of Alexion Pharmaceuticals, Inc.
EYLEA is a registered trademark of Regeneron Pharmaceuticals, Inc.

Celebrating Diverse 
Scientists

In 2023, a new mural was installed at Amgen 
headquarters, highlighting a diverse range 
of scientists who have made significant 
contributions to drug discovery and 
development.

“I imagined what it might mean to create a new 
scientist wall here at Amgen, one that more fully 
reflects our community,” said principal scientist 
Sarah Van Driesche (above), who initiated the 
mural effort.

When the idea was presented to Dr. David 
Reese, Amgen’s chief technology officer, his 
reaction was simple: “We have to do this.” 

Among those featured on the mural are  
Fu-Kuen Lin, whose breakthrough research 
paved the way for Amgen’s first medicine,  
and David Baltimore, a long-time Amgen  
board member and Nobel Prize winner. 

9

 
 
 
Amgen Inc. GAAP to Non-GAAP Reconciliations  
(Dollars in millions) (Unaudited)

GAAP operating income

    Adjustments to operating income:

     Acquisition-related expenses (a)

     Certain charges pursuant to our restructuring  
     and cost savings initiatives (b)

     Certain other expenses (c)

    Total adjustments to operating income

Non-GAAP operating income

GAAP operating income as a percentage of product sales

     Adjustments to operating income

Non-GAAP operating income as a percentage of product sales

GAAP net income

     Adjustments to net income:

     Adjustments to operating income

     Adjustments to interest expense, net (d)

     Adjustments to other income (expense), net (e) 

     Income tax effect of the above adjustments (f)

     Other income tax adjustments (g)

   Total adjustments to net income

Non-GAAP net income

Twelve months ended December 31,

2023

2022

$7,897

$9,566

5,234

263

5

5,502

2,619

(8)

584

3,195

$13,399

$12,761

29.3%

20.5

49.8%

$6,717

5,502

807

(2,147)

(846)

1

3,317

38.6%

12.9

51.5%

$6,552 

3,195 

5

554

(690)

(46)

3,018 

$10,034

$9,570

Amgen Inc. GAAP to Non-GAAP Reconciliations (In millions, except per-share data) (Unaudited)
The following table presents the computations for GAAP and non-GAAP diluted earnings per share:

Twelve months ended  
December 31, 2023

Twelve months ended  
December 31, 2022

GAAP

Non-GAAP

GAAP

Non-GAAP

Net income

Weighted-average shares for diluted EPS

Diluted EPS 

$6,717

538

$12.49

$10,034

538

$18.65

$6,552

541

$12.11

$9,570

541

$17.69

(a)    The adjustments related primarily to noncash amortization of intangible assets from business acquisitions. For the year ended December 31, 2023, the 

adjustments also included a net impairment charge for AMG 340.

(b)    The adjustments related to headcount charges, such as severance, and to asset charges, such as asset impairments and other related costs resulting  

from rationalization of our geographic footprint.

(c)    For the year ended December 31, 2022, the adjustments related primarily to a loss on the divestiture of Gensenta İlaç Sanayi ve Ticaret A.Ş.
(d)    For the year ended December 31, 2023, the adjustments included (i) interest expense on senior notes issued in March 2023 and (ii) debt issuance costs and 

other fees related to our bridge credit and term loan credit agreements, incurred prior to the closing of our acquisition of Horizon.

(e)    For the year ended December 31, 2023, the adjustments related primarily to our BeiGene, Ltd. (BeiGene) equity fair value adjustment and interest income on  
senior notes issued in March 2023 recognized prior to the closing of our acquisition of Horizon. In the first quarter of 2023, we began to account for our 
ownership interest in BeiGene as an equity security with a readily determinable fair value, with changes in fair value recorded in Other income (expense),  
net. For the year ended December 31, 2022, the adjustments related to equity investment losses and the amortization of the basis difference from our 
BeiGene equity method investment.

(f)      The tax effect of the adjustments between our GAAP and non-GAAP results takes into account the tax treatment and related tax rate(s) that apply to each 
adjustment in the applicable tax jurisdiction(s). Generally, this results in a tax impact at the U.S. marginal tax rate for certain adjustments, including the 
majority of amortization of intangible assets and certain gains and losses on our investments in equity securities, whereas the tax impact of other  
adjustments, including expenses related to restructuring and cost savings initiatives, depends on whether the amounts are deductible in the respective  
tax jurisdictions and the applicable tax rate(s) in those jurisdictions.

(g)    The adjustments related to certain acquisition items, prior period and other items excluded from GAAP earnings.

10

2023 Letter to Shareholders | FORWARD-LOOKING STATEMENTS
This  communication  contains  forward-looking  statements  that  are  based  on  the  current  expectations  and  beliefs 
of  Amgen.  All  statements,  other  than  statements  of  historical  fact,  are  statements  that  could  be  deemed  forward-
looking statements, including any statements on the outcome, benefits and synergies of collaborations, or potential 
collaborations, with any other company (including BeiGene, Ltd. or Kyowa Kirin Co., Ltd.), the performance of Otezla® 
(apremilast) (including anticipated Otezla sales growth and the timing of non-GAAP EPS accretion), our acquisitions 
of  Teneobio,  Inc.,  ChemoCentryx,  Inc.,  or  Horizon  (including  the  prospective  performance  and  outlook  of  Horizon’s 
business, performance and opportunities and any potential strategic benefits, synergies or opportunities expected as a 
result of such acquisition, and any projected impacts from the Horizon acquisition on our acquisition-related expenses 
going forward), as well as estimates of revenues, operating margins, capital expenditures, cash, other financial metrics, 
expected  legal,  arbitration,  political,  regulatory  or  clinical  results  or  practices,  customer  and  prescriber  patterns  or 
practices, reimbursement activities and outcomes, effects of pandemics or other widespread health problems on our 
business, outcomes, progress, and other such estimates and results. Forward-looking statements involve significant 
risks  and  uncertainties,  including  those  discussed  below  and  more  fully  described  in  the  Securities  and  Exchange 
Commission reports filed by Amgen, including our most recent annual report on Form 10-K and any subsequent periodic 
reports on Form 10-Q and current reports on Form 8-K. Unless otherwise noted, Amgen is providing this information as 
of the date of this communication and does not undertake any obligation to update any forward-looking statements 
contained in this document as a result of new information, future events or otherwise.

No  forward-looking  statement  can  be  guaranteed  and  actual  results  may  differ  materially  from  those  we  project. 
Our  results may  be  affected  by  our  ability  to  successfully market  both  new  and  existing  products  domestically  and 
internationally, clinical and regulatory developments involving current and future products, sales growth of recently 
launched products, competition from other products including biosimilars, difficulties or delays in manufacturing our 
products and global economic conditions. In addition, sales of our products are affected by pricing pressure, political 
and  public  scrutiny  and  reimbursement  policies  imposed  by  third-party  payers,  including  governments,  private 
insurance plans and managed care providers and may be affected by regulatory, clinical and guideline developments 
and  domestic  and  international  trends  toward  managed  care  and  healthcare  cost  containment.  Furthermore,  our 
research, testing, pricing, marketing and other operations are subject to extensive regulation by domestic and foreign 
government  regulatory  authorities.  We  or  others  could  identify  safety,  side  effects  or  manufacturing  problems  with 
our  products,  including  our  devices,  after  they  are  on  the  market.  Our  business  may  be  impacted  by  government 
investigations, litigation and product liability claims. In addition, our business may be impacted by the adoption of new 
tax  legislation  or  exposure  to  additional  tax  liabilities.  If  we  fail  to meet  the  compliance  obligations  in  the  corporate 
integrity agreement between us and the U.S. government, we could become subject to significant sanctions. Further, 
while we routinely obtain patents for our products and technology, the protection offered by our patents and patent 
applications may be challenged, invalidated or circumvented by our competitors, or we may fail to prevail in present and 
future intellectual property litigation. We perform a substantial amount of our commercial manufacturing activities at a 
few key facilities, including in Puerto Rico, and also depend on third parties for a portion of our manufacturing activities, 
and  limits  on  supply  may  constrain  sales  of  certain  of  our  current  products  and  product  candidate  development. 
An outbreak of disease or similar public health threat, such as COVID-19, and the public and governmental effort to 
mitigate against the spread of such disease, could have a significant adverse effect on the supply of materials for our 
manufacturing activities, the distribution of our products, the commercialization of our product candidates, and our 
clinical trial operations, and any such events may have a material adverse effect on our product development, product 
sales, business and results of operations. We rely on collaborations with third parties for the development of some of 
our  product  candidates  and  for  the  commercialization  and  sales  of  some  of  our  commercial  products.  In  addition, 
we compete with other companies with respect to many of our marketed products as well as for the discovery and 
development of new products. Discovery or identification of new product candidates or development of new indications 
for existing products cannot be guaranteed and movement from concept to product is uncertain; consequently, there 
can be no guarantee that any particular product candidate or development of a new indication for an existing product 
will be successful and become a commercial product. Further, some raw materials, medical devices and component 
parts for our products are supplied by sole third-party suppliers. Certain of our distributors, customers and payers have 
substantial purchasing leverage in their dealings with us. The discovery of significant problems with a product similar to 
one of our products that implicate an entire class of products could have a material adverse effect on sales of the affected 
products and on our business and results of operations. Our efforts to collaborate with or acquire other companies, 
products or technology, and to integrate the operations of companies or to support the products or technology we 
have acquired, may not be successful. There can be no guarantee that we will be able to realize any of the strategic 
benefits, synergies or opportunities arising from the Horizon acquisition, and such benefits, synergies or opportunities 
may take longer to realize than expected. We may not be able to successfully integrate Horizon, and such integration 
may take longer, be more difficult or cost more than expected. A breakdown, cyberattack or information security breach 
of our information technology systems could compromise the confidentiality, integrity and availability of our systems 
and  our  data.  Our  stock  price  is  volatile  and  may  be  affected  by  a  number  of  events.  Our  business  and  operations 
may be negatively affected by the failure, or perceived failure, of achieving our environmental, social and governance 
objectives. The effects of global climate change and related natural disasters could negatively affect our business and 
operations. Global economic conditions may magnify certain risks that affect our business. Our business performance 
could affect or limit the ability of our Board of Directors to declare a dividend or our ability to pay a dividend or repurchase 
our  common  stock.  We  may  not  be  able  to  access  the  capital  and  credit  markets  on  terms  that  are  favorable  to  
us, or at all.

11

Amgen Inc.
One Amgen Center Drive
Thousand Oaks, CA 91320-1799
Amgen.com

Connect with us:

©2024 Amgen Inc. All Rights Reserved.

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

(Mark One)

☒

☐

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

For the fiscal year ended December 31, 2023
or
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE 
SECURITIES EXCHANGE ACT OF 1934

Commission file number 001-37702 
Amgen Inc. 
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)
One Amgen Center Drive
Thousand Oaks
California
(Address of principal executive offices)

95-3540776
(I.R.S. Employer
Identification No.)

91320-1799
(Zip Code)

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

(805) 447-1000 
(Registrant’s telephone number, including area code)

Title of each class
Common stock, $0.0001 par value
2.00% Senior Notes due 2026

Trading Symbol (s)
AMGN
AMGN26

Name of each exchange on which registered
The Nasdaq Stock Market LLC
The Nasdaq Stock Market LLC

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  ý    No  ¨

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

Act.    Yes  ¨    No  ý

Indicate  by  check  mark  whether  the  registrant  (1)  has  filed  all  reports  required  to  be  filed  by  Section  13  or 
Section  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  ý    No  ¨

Indicate  by  check  mark  whether  the  registrant  has  submitted  electronically  every  Interactive  Data  File  required  to  be 
submitted  pursuant  to  Rule  405  of  Regulation  S-T  (§  232.405  of  this  chapter)  during  the  preceding  12  months  (or  for  such 
shorter period that the registrant was required to submit such files).    Yes  ý    No  ¨

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

Large accelerated filer

Accelerated filer

Non-accelerated filer

Smaller reporting company  Emerging growth company

☒

☐

☐

☐

☐

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

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

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of 

the registrant included in the filing reflect the correction of an error to previously issued financial statements.     ☐

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

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

The  approximate  aggregate  market  value  of  voting  and  non-voting  stock  held  by  non-affiliates  of  the  registrant  was 

$118,556,278,405 as of June 30, 2023.(A)

(A)

Excludes 901,685 shares of common stock held by directors and executive officers, and any stockholders whose ownership exceeds ten percent of the 
shares outstanding, at June 30, 2023. Exclusion of shares held by any person should not be construed to indicate that such person possesses the power, 
directly  or  indirectly,  to  direct  or  cause  the  direction  of  the  management  or  policies  of  the  registrant,  or  that  such  person  is  controlled  by  or  under 
common control with the registrant.

535,918,901
(Number of shares of common stock outstanding as of February 9, 2024)

Specified  portions  of  the  registrant’s  Proxy  Statement  with  respect  to  the  2024  Annual  Meeting  of  Stockholders  to  be 

held on May 31, 2024, are incorporated by reference into Part III of this annual report.

DOCUMENTS INCORPORATED BY REFERENCE

 
PART I
Item 1.

Item 1A.
Item 1B.
Item 1C.
Item 2.
Item 3.
Item 4.
PART II
Item 5.

Item 6.
Item 7.

Item 7A.
Item 8.
Item 9.

Item 9A.
Item 9B.
Item 9C.
PART III
Item 10.
Item 11.
Item 12.

Item 13.

Item 14.
PART IV
Item 15.
Item 16.
SIGNATURES

INDEX

DEFINED TERMS AND PRODUCTS

BUSINESS
Significant Developments
Marketing, Distribution and Selected Marketed Products
Reimbursement
Manufacturing, Distribution and Raw Materials
Government Regulation
Research and Development and Selected Product Candidates
Business Relationships
Human Capital Resources
Information about our Executive Officers
Geographic Area Financial Information
Investor Information
RISK FACTORS
UNRESOLVED STAFF COMMENTS
CYBERSECURITY
PROPERTIES
LEGAL PROCEEDINGS
MINE SAFETY DISCLOSURES

MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER 
MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
RESERVED
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
RESULTS OF OPERATIONS
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
FINANCIAL DISCLOSURE
CONTROLS AND PROCEDURES
OTHER INFORMATION
DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS

DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE 
EXECUTIVE COMPENSATION
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT 
AND RELATED STOCKHOLDER MATTERS
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR 
INDEPENDENCE
PRINCIPAL ACCOUNTANT FEES AND SERVICES

EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
FORM 10-K SUMMARY

i

Page No.
ii
1
1
1
2
10
11
13
17
22
24
27
28
28
29
54
54
56
57
57
58

58
59

60
80
82

82
83
85
85
85
85
85

86

86
86
87
87
93
94

 
Defined Terms and Products 

Defined terms

We use several terms in this Form 10-K, including but not limited to those that are finance, regulation and disease-state 

related as well as names of other companies, which are given below.

Term
2017 Tax Act
AbbVie
ALL
Amended 2009 Plan
AOCI
ASCVD
ASR
AstraZeneca
BeiGene
Bergamo
BiTE®
BLA
BPCIA
CCPA
CDT
Celgene
CGRP
ChemoCentryx
chemotherapy
CHMP

CIO

CISO
CMS
COSO
COVID-19
CRC

CRCC
CV
DLL3
DOJ
DTI
EC
Eczacıbaşı
EMA
EPS
ESG
EU
FASB
FCPA
FDA
FDCA
Fitch
Five Prime

Description
Tax Cuts and Jobs Act of 2017
AbbVie Inc.
acute lymphoblastic leukemia
Amended and Restated 2009 Equity Incentive Plan
accumulated other comprehensive income (loss)
atherosclerotic cardiovascular disease
Accelerated Share Repurchase
AstraZeneca plc
BeiGene, Ltd.
Laboratorio Quimico Farmaceutico Bergamo Ltda
bispecific T-cell engager
Biologics License Application
Biologics Price Competition and Innovation Act of 2009
California Consumer Privacy Act of 2018
Cybersecurity & Digital Trust
Celgene Corporation
calcitonin gene-related peptide
ChemoCentryx, Inc.
anticancer medicines
Committee for Medicinal Products for Human Use

Chief Information Officer

Chief Information Security Officer
Centers for Medicare & Medicaid Services
Committee of Sponsoring Organizations of the Treadway Commission
coronavirus disease 2019
colorectal cancer

Corporate Responsibility and Compliance Committee
cardiovascular
delta-like ligand 3
U.S. Department of Justice
Digital, Technology & Innovation
European Commission
EIS Eczacıbaşı İlaç, Sınai ve Finansal Yatırımlar Sanayi ve Ticaret A.Ş.
European Medicines Agency
earnings per share
environmental, social and governance
European Union
Financial Accounting Standards Board
U.S. Foreign Corrupt Practices Act
U.S. Food and Drug Administration
Federal Food, Drug, and Cosmetic Act
Fitch Ratings, Inc.
Five Prime Therapeutics, Inc.

ii

Term
FTC
GAAP
GDPR
GEJ
Gensenta
HHS
Horizon
IGF-1R
IL
IND
IPR&D
IRA
IRS
Janssen
Kyowa Kirin
KRAS
LDL-C
LIBOR
Lilly
Lp(a)
MAA

mCRC
MD&A
Moody’s
mOS

mPFS
MRD
Neumora
NOL
Novartis
NSCLC
OECD
OIG
ORR
PBM
PCSK9
PDAB
PDE4
PDUFA
PFS
PSUs
R&D
RANKL
RAR
RAS
REMS
ROU
ROW

Description
Federal Trade Commission
U.S. generally accepted accounting principles
General Data Protection Regulation
gastroesophageal junction
Gensenta İlaç Sanayi ve Ticaret A.Ş.
U.S. Department of Health & Human Services
Horizon Therapeutics plc
insulin-like growth factor-1 receptor
interleukin
Investigational New Drug Application
in-process research and development
Inflation Reduction Act
Internal Revenue Service
Janssen Biotech, Inc.
Kyowa Kirin Co., Ltd.
Kirsten rat sarcoma viral oncogene
low-density lipoprotein cholesterol
London Interbank Offered Rate
Eli Lilly and Company
lipoprotein(a)
Marketing Authorisation Application

metastatic colorectal cancer
management’s discussion and analysis
Moody’s Investors Service, Inc.
median overall survival

median progression-free survival
minimal residual disease
Neumora Therapeutics, Inc.
net operating loss
Novartis Pharma AG
non-small cell lung cancer
Organisation for Economic Co-operation and Development
Office of Inspector General
objective response rate
pharmacy benefit manager
proprotein convertase subtilisin/kexin type 9
Prescription Drug Affordability Board
phosphodiesterase 4
Prescription Drug User Fee Action
progression-free survival
performance share units
research and development
receptor activator of nuclear factor kappa-B ligand
Revenue Agent Report
Rat sarcoma viral oncogene
risk evaluation and mitigation strategy
right-of-use
rest of world

iii

Term
RSUs
S&P
SCLC
SEC
SG&A
siRNA
SOFR
TED
Teneobio
U.S. Treasury
USPTO
UTB

Description
restricted stock units
Standard & Poor’s Financial Services LLC
small cell lung cancer
U.S. Securities and Exchange Commission
selling, general and administrative
small interfering RNA
Secured Overnight Financing Rate
thyroid eye disease
Teneobio, Inc.
U.S. Department of Treasury
U.S. Patent and Trademark Office
unrecognized tax benefit

iv

Products

The brand names of our products, our delivery devices and certain of our product candidates and their associated generic 

names are given below.

Term

ACTIMMUNE

Aimovig

AMJEVITA/AMGEVITA

Aranesp

AutoTouch

AVSOLA

BEKEMV

BLINCYTO

BUPHENYL

Corlanor
DUEXIS
ENBREL
ENBREL Mini
EPOGEN
EVENITY
IMLYGIC
KANJINTI
KRYSTEXXA
KYPROLIS
LUMAKRAS/LUMYKRAS
Maridebart cafraglutide
MVASI

Neulasta

NEUPOGEN

Nplate

Onpro

Otezla
Parsabiv
PENNSAID

PROCYSBI

Prolia

Pushtronex

QUINSAIR

RAVICTI

RAYOS

Repatha

RIABNI

Sensipar/Mimpara

SureClick

TAVNEOS

TEPEZZA

Description
ACTIMMUNE® (interferon gamma-1b)(1)
Aimovig® (erenumab-aooe)
AMJEVITA® (adalimumab-atto)/AMGEVITA™ (adalimumab)
Aranesp® (darbepoetin alfa)
AutoTouch®
AVSOLA® (infliximab-axxq)
BEKEMV™ (eculizumab)
BLINCYTO® (blinatumomab)
BUPHENYL® (sodium phenylbutyrate)(1)
Corlanor® (ivabradine)
DUEXIS® (ibuprofen and famotidine)(1)
Enbrel® (etanercept)
ENBREL Mini®
EPOGEN® (epoetin alfa)
EVENITY® (romosozumab-aqqg)
IMLYGIC® (talimogene laherparepvec)
KANJINTI® (trastuzumab-anns)
KRYSTEXXA® (pegloticase)(1)
KYPROLIS® (carfilzomib)
LUMAKRAS®/LUMYKRAS™ (sotorasib)
Maridebart cafraglutide (formerly AMG 133)
MVASI® (bevacizumab-awwb)
Neulasta® (pegfilgrastim)
NEUPOGEN® (filgrastim)
Nplate® (romiplostim)
Onpro®
Otezla® (apremilast)
Parsabiv® (etelcalcetide)
PENNSAID® 2% (diclofenac sodium topical solution)(1)
PROCYSBI® (cysteamine bitartrate)(1)
Prolia® (denosumab)
Pushtronex®
QUINSAIR® (levofloxacin)(1)
RAVICTI® (glycerol phenylbutyrate)(1)
RAYOS® (prednisone)(1)
Repatha® (evolocumab)
RIABNI® (rituximab-arrx)
Sensipar®/Mimpara™ (cinacalcet)
SureClick®
TAVNEOS® (avacopan) 
TEPEZZA® (teprotumumab-trbw)(1)

v

Term

TEZSPIRE

UPLIZNA

Vectibix

Wezlana

Xaluritamig

XGEVA

____________

Description
TEZSPIRE® (tezepelumab-ekko)
UPLIZNA® (inebilizumab-cdon)(1)
Vectibix® (panitumumab)
WEZLANA™ (ustekinumab-auub)
Xaluritamig (formerly AMG 509)
XGEVA® (denosumab)

(1)  Products were acquired from our Horizon acquisition on October 6, 2023.

Products referenced in this report that are not included in the above list are trademarks of their respective owners. They 
are  Avastin®,  BESPONSA®,  Cosentyx®,  DARZALEX®,  ERBITUX®,  EYLEA®,  Herceptin®,  HUMIRA®,  KEYTRUDA®, 
LEQVIO®, POMALYST®/IMNOVID®, PRALUENT®, PROCRIT®, PROMACTA®/REVOLADE™, Remicade®, REVLIMID®, 
RINVOQ®, Rituxan®/MabThera®, Skyrizi®, SOLIRIS®, SOTYKTU®, STELARA®, Taltz®, Teribone™, Tremfya®, VELCADE® 
and Xeljanz®.

vi

PART I

Item 1.

BUSINESS

Amgen Inc. (including its subsidiaries, referred to as “Amgen,” “the Company,” “we,” “our” or “us”) discovers, develops, 
manufactures and delivers innovative medicines to fight some of the world’s toughest diseases. Amgen focuses on areas of high 
unmet  medical  need  and  leverages  its  expertise  to  strive  for  solutions  that  dramatically  improve  people’s  lives,  while  also 
reducing the social and economic burden of disease. We helped launch the biotechnology industry more than 40 years ago and 
have grown to be one of the world’s leading independent biotechnology companies. Our robust pipeline includes potential first-
in-class medicines at all stages of development. We have a presence in approximately 100 countries worldwide.

Amgen  was  incorporated  in  California  in  1980  and  became  a  Delaware  corporation  in  1987.  Amgen  operates  in  one 

business segment: human therapeutics.

Significant Developments

Following is a summary of significant developments affecting our business that have occurred and that we have reported 

since the filing of our Annual Report on Form 10-K for the year ended December 31, 2022.

Acquisition of Horizon Therapeutics plc

In October 2023, we completed our acquisition of Horizon for $116.50 per share in cash, representing a total transaction 
price  of  $27.8  billion.  Horizon  is  a  global  biotechnology  company  focused  on  the  discovery,  development  and 
commercialization of medicines that address critical needs of patients impacted by rare, autoimmune and severe inflammatory 
diseases.  The  acquisition  aligns  with  Amgen’s  core  strategy  of  delivering  innovative  medicines  that  make  a  significant 
difference for patients suffering from serious diseases and strengthens Amgen’s rare disease portfolio by adding first-in-class, 
early-in-lifecycle  medicines,  including  TEPEZZA  for  thyroid  eye  disease  (TED),  KRYSTEXXA  for  chronic  refractory  gout 
and  UPLIZNA  for  neuromyelitis  optica  spectrum  disorder.  See  Item  1A.  Risk  Factors—Our  efforts  to  collaborate  with  or 
acquire other companies, products, or technology, and to integrate the operations of companies or to support the products or 
technology  we  have  acquired,  may  not  be  successful,  and  may  result  in  unanticipated  costs,  delays  or  failures  to  realize  the 
benefits of the transactions.

Products/Pipeline

Tarlatamab

In  October  2023,  we  announced  results  from  the  global  Phase  2  DeLLphi-301  study,  evaluating  tarlatamab,  an 
investigational delta-like ligand 3 (DLL3) targeting BiTE® (bispecific T-cell engager) molecule, in patients with advanced stage 
small cell lung cancer (SCLC) who had failed two or more prior lines of treatment. With a median follow-up of 10.6 months, an 
intention-to-treat analysis that included 100 patients at the selected 10 mg dose, tarlatamab demonstrated an objective response 
rate (ORR; primary endpoint) of 40%. For key secondary endpoints, median progression-free survival (mPFS) was 4.9 months, 
and  median  overall  survival  (mOS)  was  14.3  months.  There  were  no  new  safety  signals  observed  compared  to  the  Phase  1 
study. Additionally in October 2023, the FDA granted tarlatamab Breakthrough Therapy Designation for the treatment of adult 
patients with extensive-stage SCLC with disease progression on or after platinum-based chemotherapy.

In December 2023, we announced the FDA accepted and granted Priority Review for the Company’s BLA for tarlatamab, 

with a PDUFA date of June 12, 2024.

LUMAKRAS/LUMYKRAS

In December 2023, we announced that the FDA completed its review of our supplemental New Drug Application seeking 
full  approval  of  LUMAKRAS,  resulting  in  a  Complete  Response  Letter.  The  review  was  based  on  the  CodeBreaK  200  trial 
results for the treatment of adults with previously treated locally advanced or metastatic KRAS G12C-mutated non-small cell 
lung cancer (NSCLC). The FDA also issued a new postmarketing requirement (PMR) for an additional confirmatory study to 
support  full  approval  that  will  be  completed  no  later  than  February  2028.  Additionally,  the  FDA  concluded  that  the  dose 
comparison PMR issued at the time of LUMAKRAS’s accelerated approval has been fulfilled. LUMAKRAS at 960 mg once-
daily will remain the dose for patients with KRAS G12C-mutated NSCLC under accelerated approval.

In October 2023, we announced positive data from the global Phase 3 CodeBreaK 300 trial. This global Phase 3 study 
evaluated  two  doses  of  LUMAKRAS/LUMYKRAS  (960  mg  or  240  mg)  in  combination  with  Vectibix  versus  investigator’s 
choice of therapy (trifluridine and tipiracil, or regorafenib) in patients with chemorefractory G12C-mutated mCRC.

1

In  June  2023,  based  on  data  from  the  previous  CodeBreaK  101  study,  the  FDA  granted  Breakthrough  Therapy 
Designation to LUMAKRAS in combination with Vectibix for the treatment of patients with metastatic KRAS G12C-mutated 
CRC, as determined by an FDA approved test, who have received prior chemotherapy.

Marketing, Distribution and Selected Marketed Products

The  largest  concentration  of  our  sales  and  marketing  forces  is  based  in  the  United  States  and  Europe.  We  also 
commercialize and market our products into other geographic territories, including Japan, China and other parts of Asia, Latin 
America and the Middle East by using our own affiliates, by acquiring existing third-party businesses or product rights or by 
collaborating with third parties. This international footprint allows us to deliver our medicines to more patients globally. See 
Business  Relationships  for  our  significant  alliances.  Whether  we  use  our  own  sales  and  marketing  forces  or  a  third  party’s 
services varies across these markets. Such use typically depends on several factors, including the nature of entry into the new 
market,  the  size  of  an  opportunity  and  operational  capabilities.  Together  with  our  collaborators,  we  market  our  products  to 
healthcare providers, including physicians or their clinics, dialysis centers, hospitals and pharmacies.

In  the  United  States,  substantially  all  of  our  sales  are  to  pharmaceutical  wholesale  distributors,  which  are  the  principal 
means  of  distributing  our  products  to  healthcare  providers.  We  also  market  certain  products  through  direct-to-consumer 
channels, including print, television and online media. For further discussion, see Government Regulation—Regulation in the 
United  States—Regulation  of  Product  Marketing  and  Promotion.  Outside  the  United  States,  we  sell  principally  to  healthcare 
providers  and/or  pharmaceutical  wholesale  distributors  depending  on  the  distribution  practice  in  each  country.  In  the  Asia 
Pacific region, we also sell our products in partnership with other companies, including Astellas Pharma Inc., BeiGene, Takeda 
Pharmaceutical Company Limited, Daiichi Sankyo Co., Ltd. and Kyowa Kirin.

Our  product  sales  to  three  large  wholesalers,  McKesson  Corporation,  Cencora,  Inc.  (formerly  AmerisourceBergen)  and 
Cardinal Health, Inc., each individually accounted for more than 10% of total revenues for each of the years 2023, 2022 and 
2021. On a combined basis, these wholesalers accounted for 79%, 82% and 82% of worldwide gross revenues for 2023, 2022 
and  2021,  respectively.  We  monitor  the  financial  condition  of  our  larger  customers  and  limit  our  credit  exposure  by  setting 
credit limits and, in certain circumstances, by requiring letters of credit or obtaining credit insurance.

2

Our products are marketed around the world, with the United States as our largest market. The following chart shows our 
product sales by principal product, and the table below (dollar amounts in millions) shows product sales by geography for the 
years 2023, 2022 and 2021.

Product Sales by Geography:

U.S.

ROW

Total

____________

2023

2022

2021

$ 

$ 

19,272 

7,638 

26,910 

 72 % $ 

17,743 

 72 % $ 

17,286 

 28 %  

7,058 

 28 %  

7,011 

 71 %

 29 %

 100 % $ 

24,801 

 100 % $ 

24,297 

 100 %

(1)  TEPEZZA and KRYSTEXXA were acquired from our Horizon acquisition on October 6, 2023, and include product sales from the acquisition date through 

December 31, 2023.

(2)  Consists of product sales of our non-principal products, as well as sales prior to the divestiture of our Bergamo and Gensenta subsidiaries in the second 

quarter of 2023 and fourth quarter of 2022, respectively.

3

% of Total Product Sales15%15%13%14%17%19%8%9%9%8%8%8%6%5%5%5%5%4%5%5%5%5%6%6%4%3%2%4%4%4%3%2%2%2%1%20%21%23%ProliaENBRELOtezlaXGEVARepathaNplateKYPROLISAranespEVENITYVectibixBLINCYTOTEPEZZA⁽¹⁾ KRYSTEXXA⁽¹⁾Other products⁽²⁾202320222021 
Prolia

We  market  Prolia  in  many  countries  around  the  world.  Prolia  contains  the  same  active  ingredient  as  XGEVA  but  is 
approved for different indications, patient populations, dose and frequency of administration. Prolia was launched in the United 
States  and  Europe  in  2010.  In  the  United  States,  it  is  used  primarily  in  the  indication  for  the  treatment  of  postmenopausal 
women with osteoporosis at high risk of fracture and for treatment to increase bone mass in men with osteoporosis at high risk 
of  fracture.  In  Europe,  Prolia  is  used  primarily  for  the  treatment  of  osteoporosis  in  postmenopausal  women  and  men  at 
increased risk of fracture.

ENBREL

We market ENBREL, a tumor necrosis factor blocker, in the United States and Canada. ENBREL was launched in 1998 
and is used primarily in indications for the treatment of adult patients with moderately to severely active rheumatoid arthritis, 
patients with chronic moderate-to-severe plaque psoriasis who are candidates for systemic therapy or phototherapy and patients 
with active psoriatic arthritis.

Otezla

We market Otezla, a small molecule that inhibits phosphodiesterase 4 (PDE4), in many countries around the world. Otezla 
was  acquired  from  Bristol  Myers  Squibb  Company  in  November  2019  after  their  acquisition  of  Celgene.  Otezla  is  an  oral 
therapy  approved  for  the  treatment  of  adults  with  plaque  psoriasis  across  all  severities  (in  the  United  States,  Japan  and 
Australia) and moderate-to-severe plaque psoriasis (in other global markets, including Europe), for adults with active psoriatic 
arthritis and for adults with oral ulcers associated with Behçet’s disease.

XGEVA

We  market  XGEVA  in  many  countries  around  the  world.  XGEVA  was  launched  in  2010  and  is  used  primarily  in  the 
indication for prevention of skeletal-related events (pathological fracture, radiation to bone, spinal cord compression or surgery 
to bone) in patients with bone metastases from solid tumors and multiple myeloma.

Repatha

We  market  Repatha,  a  PCSK9  inhibitor,  in  many  countries  around  the  world.  Repatha  was  launched  in  2015  and  is 
indicated  to  reduce  the  risks  of  myocardial  infarction,  stroke  and  coronary  revascularization  in  adults  with  established  CV 
disease. Repatha is also indicated to reduce low-density lipoprotein cholesterol (LDL-C) in adults with primary hyperlipidemia, 
including heterozygous familial hypercholesterolemia (HeFH).

Nplate

We  market  Nplate  in  many  countries  around  the  world.  Nplate  was  launched  in  2008  and  is  indicated  to  treat 
thrombocytopenia in patients with immune thrombocytopenia (ITP) who have had an insufficient response to corticosteroids, 
immunoglobulins or splenectomy.

KYPROLIS

We market KYPROLIS primarily in the United States and Europe. KYPROLIS was launched in 2012 and is indicated in 
combination  with  (i)  dexamethasone,  (ii)  lenalidomide  plus  dexamethasone,  (iii)  daratumumab  plus  dexamethasone,  (iv) 
daratumumab plus hyaluronidase-fihj plus dexamethasone, and (v) isatuximab plus dexamethasone for the treatment of patients 
with  relapsed  or  refractory  multiple  myeloma  who  have  received  one  to  three  prior  lines  of  therapy.  It  is  also  approved  as  a 
single agent for patients with relapsed or refractory multiple myeloma who have received one or more previous therapies.

Aranesp

We market Aranesp primarily in the United States and Europe. Aranesp was launched in 2001 and is indicated to treat a 
lower-than-normal number of red blood cells (anemia) caused by chronic kidney disease (CKD) in both patients on dialysis and 
patients  not  on  dialysis.  Aranesp  is  also  indicated  for  the  treatment  of  anemia  due  to  concomitant  myelosuppressive 
chemotherapy in certain patients with nonmyeloid malignancies and when chemotherapy will be used for at least two months 
after starting Aranesp.

4

EVENITY

Together  with  our  collaboration  partners,  we  market  EVENITY  in  many  countries  around  the  world.  EVENITY  was 
launched  in  the  United  States  and  Japan  in  2019.  In  the  United  States,  it  is  used  in  the  indication  for  the  treatment  of 
osteoporosis in postmenopausal women at high risk for fracture, defined as a history of osteoporotic fracture, or multiple risk 
factors for fracture; or patients who have failed or are intolerant to other available osteoporosis therapy. In Japan, EVENITY is 
used primarily in the indication for the treatment of osteoporosis in postmenopausal women and men at high risk of fracture.

Vectibix

We market Vectibix in many countries around the world. Vectibix was launched in 2006 and is indicated for the treatment 
of patients with wild-type RAS metastatic colorectal cancer (mCRC, cancer that has spread outside the colon and rectum). RAS 
status is determined by an FDA-approved test.

BLINCYTO

We market BLINCYTO in many countries around the world. BLINCYTO was launched in 2014 and has proven efficacy 
in a wide range of patients with CD19-positive B-cell precursor acute lymphoblastic leukemia (ALL), including those who are 
MRD(–)  or  MRD(+)  in  frontline  consolidation,  and  those  with  relapsed  or  refractory  (R/R)  disease.  ALL  is  a  cancer  of  the 
blood in which a particular kind of white blood cell is growing out of control.

TEPEZZA

Subsequent to the closing of our Horizon acquisition, we market TEPEZZA primarily in the United States. TEPEZZA is a 
fully human monoclonal antibody and a targeted inhibitor of the insulin-like growth factor-1 receptor (IGF-1R) that is the first 
and  only  FDA  approved  medicine  for  the  treatment  of  thyroid  eye  disease  (TED).  TED  is  a  serious,  progressive  and  vision-
threatening rare autoimmune condition. While TED often occurs in people living with hyperthyroidism or Graves’ disease, it is 
a distinct disease that is caused by autoantibodies activating an IGF-1R-mediated signaling complex on cells within the retro-
orbital  space.  This  leads  to  a  cascade  of  negative  effects,  which  may  cause  long-term,  irreversible  eye  damage.  As  TED 
progresses,  it  causes  serious  damage,  including  proptosis  (eye  bulging),  strabismus  (misalignment  of  the  eyes)  and  diplopia 
(double vision), and in some cases can lead to blindness. Historically, patients have had to live with TED until the inflammation 
subsides, after which they are often left with permanent and vision-impairing consequences and may require multiple surgeries 
that do not completely return the patient to their pre-disease state.

KRYSTEXXA

Subsequent to the closing of our Horizon acquisition, we market KRYSTEXXA in the United States. KRYSTEXXA is 
the  first  and  only  FDA-approved  medicine  for  the  treatment  of  chronic  refractory  gout.  Chronic  refractory  gout  occurs  in 
patients who have failed to normalize serum uric acid (sUA) and whose signs and symptoms are inadequately controlled with 
conventional therapies, such as xanthine oxidase inhibitors (XOIs), at the maximum medically appropriate dose, or for whom 
these drugs are contraindicated.

Other Marketed Products

We also market a number of other products in various markets worldwide, including but not limited to Neulasta, MVASI, 
AMJEVITA/AMGEVITA,  TEZSPIRE,  Parsabiv,  Aimovig,  LUMAKRAS/LUMYKRAS,  EPOGEN,  KANJINTI,  TAVNEOS, 
RAVICTI, UPLIZNA and PROCYSBI.

Patents

The following table lists our outstanding material patents for the indicated product by territory, general subject matter and 
latest expiry date. Certain of the European patents are subjects of supplemental protection certificates that provide additional 
protection for the products in certain European countries beyond the dates listed in the table. See footnotes to the patent table 
below.

One or more patents with the same or earlier expiry dates may fall under the same general subject matter and are not listed 

separately.

Product

Prolia®/XGEVA® (denosumab)

Territory General subject matter

U.S.

Europe

RANKL antibodies, including sequences
RANKL antibodies, including sequences(1)

Expiration

2/19/2025

6/25/2022

5

Product

Territory General subject matter

Formulations and methods of preparing formulations

Fusion protein and pharmaceutical compositions

DNA encoding fusion protein and methods of making fusion protein

Compositions and compounds
Compositions, compounds and methods of treatment(1)
Antibodies(2)
Methods of treatment
Compositions(1)
Methods of treatment

Formulation

Formulation
Thrombopoietic compounds(1)
Formulation

Compositions and compounds

Methods of treatment

Methods of making
Compositions, compounds and methods of treatment(1)
Glycosylation analogs of erythropoietin proteins
Antibodies

Methods of treatment

Formulation and methods of using formulation
Antibodies(1) 
Methods of treatment

Formulation and methods of using formulation

Pharmaceutical compositions and bifunctional polypeptides

Method of administration
Bifunctional polypeptides(1)
Method of administration
Polypeptides(2)
Methods of treatment
Polypeptides(1)
IGF-1R antibodies(3)
Compound and pharmaceutical composition

Formulation

Methods of making
Compound and pharmaceutical composition(1)
Formulation

CGRP receptor antibodies
Methods of treatment

Compositions and pharmaceutical formulations
CGRP receptor antibodies(1)
Methods of treatment

Compounds and pharmaceutical compositions

Crystalline form, pharmaceutical compositions and methods of treatment

Methods of treatment

Enbrel® (etanercept)

Otezla® (apremilast)

Repatha® (evolocumab)

Nplate® (romiplostim)

KYPROLIS® (carfilzomib)

Aranesp® (darbepoetin alfa)

EVENITY® (romosozumab-aqqg)

BLINCYTO® (blinatumomab)

TEZSPIRE® (tezepelumab-ekko)

U.S.

U.S.

U.S.

U.S.

Europe

U.S.

U.S.

Europe

Europe

Europe

U.S.

Europe

Europe

U.S.

U.S.

U.S.

Europe

U.S.
U.S.

U.S.

U.S.

Europe

Europe

Europe

U.S.

U.S.

Europe

Europe

U.S.

U.S.

Europe

TEPEZZA® (teprotumumab-trbw) U.S.
U.S.

U.S.

U.S.

Europe

Europe

U.S.
U.S.

U.S.

Europe

Europe

U.S.

U.S.

U.S.

Parsabiv® (etelcalcetide)

Aimovig® (erenumab-aooe)

LUMAKRAS®/LUMYKRAS™ 
(sotorasib)

KRYSTEXXA® (pegloticase)

TAVNEOS® (avacopan)

UPLIZNA® (inebilizumab-cdon)

Europe

Compounds, pharmaceutical compositions and methods of treatment

U.S.

U.S.

U.S.

U.S.
U.S.

Europe

Polypeptides and pharmaceutical compositions

Methods of treatment
Compounds and pharmaceutical compositions(2)
Crystalline and amorphous forms and pharmaceutical compositions
CD19 antibodies and pharmaceutical compositions(2)
CD19 antibodies, pharmaceutical compositions and methods of treatment(1)

(1) A European patent with this subject matter may also be entitled to supplemental protection in one or more countries in 
Europe,  and  the  length  of  any  such  extension  will  vary  by  country.  For  example,  supplementary  protection  certificates 
have been issued related to the indicated products for patents in at least the following countries:

•

denosumab — France, Germany, Italy, Spain and the United Kingdom, expiring in 2025

6

Expiration

10/19/2037

11/22/2028

4/24/2029

2/16/2028

3/20/2023

8/22/2028

11/22/2030

8/22/2028

5/10/2032

5/3/2033

2/12/2028

10/22/2019

4/20/2027

12/7/2027

4/14/2025

5/8/2033

12/7/2025

5/15/2024
4/25/2026

4/9/2033

5/11/2031

4/28/2026

4/18/2032

5/11/2031

4/6/2030

9/28/2027

11/26/2024

11/6/2029

2/3/2029

8/23/2038

9/9/2028

3/3/2029

2/7/2031

6/27/2034

8/9/2035

7/29/2030

6/27/2034

5/17/2032
4/22/2036

4/1/2039

12/18/2029

8/10/2035

5/21/2038

5/20/2040

9/15/2040

5/21/2038

4/11/2026
6/25/2030

2/3/2031

5/29/2041

3/7/2030
9/7/2027

•

•

•

•

•

•

•

•

•

•

apremilast — France, Germany, Italy, Spain and the United Kingdom expiring in 2028

carfilzomib — France, Germany, Italy, Spain and the United Kingdom expiring in 2030

evolocumab — France, expiring in 2030 and Spain and the United Kingdom, expiring in 2031

romiplostim — France, Germany, Italy, Spain and the United Kingdom, expiring in 2024

romosozumab — France, Germany, Italy, Spain and the United Kingdom, expiring in 2031

blinatumomab — France, Germany, Italy and Spain, expiring in 2029

erenumab — France, Italy, Spain and the United Kingdom, expiring in 2033

etelcalcetide — France, Germany, Italy, Spain and the United Kingdom, expiring in 2031

tezepelumab — France and Italy, expiring in 2033

inebilizumab — Italy and Spain, expiring in 2032

(2) A patent with this subject matter may be entitled to patent term extension in the United States.

(3) We have biologic exclusivity in the United States covering teprotumumab-trbw that will expire in 2032.

Competition

We operate in a highly competitive environment. A number of our marketed products are indicated for disease areas in 
which  other  products  or  treatments  are  currently  available  or  are  being  pursued  by  our  competitors  through  R&D  activities. 
Additionally, some competitor-marketed products target the same genetic pathways as our recently launched marketed products 
or are currently in development. This competition could impact the pricing and market share of our products. We continue to 
pursue ways of increasing the value of our medicines through innovations, which can include expanding the disease areas for 
which our products are indicated and finding new methods to make the delivery or manufacture of our medicines easier and less 
costly. Such activities can offer important opportunities for differentiation. We plan to continue pursuing innovation efforts to 
strengthen  our  competitive  position.  Such  position  may  be  based  on,  among  other  things,  safety,  efficacy,  reliability, 
availability,  patient  convenience,  delivery  devices,  price,  reimbursement,  access  to  and  timing  of  market  entry  and  patent 
position and expiration.

Certain  of  the  existing  patents  on  our  principal  products  have  expired,  and  we  face  new  and  increasing  competition, 
including from biosimilars and generics. A biosimilar is another version of a biological product for which marketing approval is 
sought  or  has  been  obtained  based  on  a  demonstration  that  it  is  “highly  similar”  to  the  original  reference  product.  We  have 
experienced adverse effects from biosimilar competition on our originator product sales. Companies have launched versions of 
EPOGEN,  NEUPOGEN,  Neulasta  and  ENBREL  (Canada  only)  with  U.S.  ENBREL  biosimilars  approved  but  not  launched. 
Once multiple biosimilar versions of one of our originator products have launched, competition has intensified rapidly, resulting 
in greater net price declines for both the reference and the biosimilar products and a greater effect on product sales. See also 
Government Regulation—Regulation in the United States—Approval of Biosimilars.

We  also  have  our  own  biosimilar  products  both  in  the  United  States  and  outside  of  U.S.  markets  that  are  competing 
against  branded  and  biosimilar  versions  of  our  competitors’  products.  In  2019,  Amgen  launched  MVASI,  a  biosimilar  to 
Avastin, and KANJINTI, a biosimilar to Herceptin; and in 2018, Amgen launched AMGEVITA, a biosimilar to HUMIRA, in 
markets  outside  the  United  States.  In  2020,  we  launched  AVSOLA,  a  biosimilar  to  Remicade;  and  in  2021,  we  launched 
RIABNI,  a  biosimilar  to  Rituxan.  In  2023,  we  launched  AMJEVITA,  a  biosimilar  to  HUMIRA,  in  the  United  States,  and 
BEKEMV,  a  biosimilar  to  SOLIRIS,  in  the  EU.  Additionally,  in  2023,  Amgen  received  FDA  approval  for  Wezlana,  a 
biosimilar to STELARA, which we expect to launch in the United States in 2025. We expect additional biosimilar competition 
against both our branded and biosimilar products in the future across markets.

Although biosimilars compete on price, we believe many patients, providers and payers will continue to place high value 
on the reputation, supply reliability and safety of our products. As additional biosimilar competitors come to market, we will 
continue to leverage our global experience to distinguish against both branded and biosimilar competitors.

7

Although  most  of  our  products  are  biologics,  some  are  small  molecule  products,  including  Otezla,  KYPROLIS  and 
LUMAKRAS/LUMYKRAS.  Because  the  FDA  approval  process  permits  generic  manufacturers  to  rely  on  the  safety  and 
efficacy data of the innovator product rather than having to conduct their own costly and time-consuming clinical trials, generic 
manufacturers can often develop and market their competing versions of our small molecule products at much lower prices. For 
example, following loss of exclusivity of patents directed to cinacalcet, the active ingredient in our small molecule calcimimetic 
Sensipar, we lost a significant share of the market and corresponding revenues in a very short period of time. See Part IV—
Note 20, Contingencies and commitments, to the Consolidated Financial Statements.

The introduction of new products, the development of new processes or technologies by competitors or the emergence of 
new  information  about  existing  products  may  result  in  (i)  increased  competition  for  our  marketed  products,  even  for  those 
protected by patents and/or (ii) reductions in the prices we receive from selling our products. In addition, the development of 
new  treatment  options  or  standards  of  care  may  reduce  the  use  of  our  products  or  may  limit  the  utility  and  application  of 
ongoing clinical trials of our product candidates. (As used in this document, the term clinical trials may include prospective 
clinical  trials,  observational  studies,  registries  and  other  studies.)  See  Item  1A.  Risk  Factors—Our  products  face  substantial 
competition  and  our  product  candidates  are  also  likely  to  face  substantial  competition  and  Item  1A.  Risk  Factors—We 
currently  face  competition  from  biosimilars  and  generics  and  expect  to  face  increasing  competition  from  biosimilars  and 
generics in the future.

8

The following table reflects our significant competitors for our principal products and is not exhaustive.

Product

Prolia(1)

ENBREL

Territory
U.S., Europe & 
Asia Pacific
U.S.

U.S.

U.S.

Canada

U.S. & Europe

U.S. & Europe

Competitor-marketed product

Bisphosphonates, including generics

HUMIRA†
Xeljanz

RINVOQ

Etanercept biosimilars
HUMIRA†
Cosentyx

U.S. & Europe

Taltz

Otezla

U.S. & Europe

Tremfya

U.S. & Europe

Skyrizi

U.S. & Europe

SOTYKTU

U.S. & Europe

Topical products

U.S. & Europe
U.S., Europe & 
Asia Pacific
U.S. & Europe

Zoledronate generics

PRALUENT

LEQVIO

XGEVA

Repatha

Nplate

U.S. & Europe

PROMACTA/REVOLADE

KYPROLIS

Aranesp

EVENITY

Vectibix

BLINCYTO

VELCADE
REVLIMID(4)
POMALYST/IMNOVID

DARZALEX
PROCRIT(6)
Epoetin alfa biosimilars

U.S.

U.S. & Europe

U.S. & Europe

U.S. & Europe

U.S.

U.S. & Europe

U.S.

Japan

Teribone

U.S. & Europe

Avastin

U.S.

KEYTRUDA

U.S. & Europe

ERBITUX

U.S. & Europe

Chemotherapy regime

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

BESPONSA
Chemotherapy regime

Competitors

Various

AbbVie

Pfizer Inc.

AbbVie

Various

AbbVie

Novartis

Lilly
Janssen(2)
AbbVie

Bristol Myers Squibb (BMS)

Various

Various
Regeneron Pharmaceuticals, Inc.
Sanofi
Novartis

Novartis
Millennium Pharmaceuticals, Inc.(3)
Various
Celgene(5)
Janssen(2)
Janssen(2)
Various

Asahi Kasei Pharma

F. Hoffmann-La Roche Ltd (Roche)

Merck & Co., Inc.

Lilly

Various

Pfizer Inc.
Various

Bisphosphonates, including generics

Various

† Approved biosimilars available.

(1) Other biosimilars under regulatory review in the United States, Europe and Asia Pacific.

(2) A subsidiary of Johnson & Johnson.

(3) A subsidiary of Takeda Pharmaceutical Company Limited.

(4) REVLIMID also includes generics.

(5) A subsidiary of Bristol Myers Squibb Company.

(6) PROCRIT competes with Aranesp in supportive cancer care and predialysis settings.

TEPEZZA  and  KRYSTEXXA  currently  do  not  face  any  direct  competitors  in  the  United  States  or  Europe.  TEPEZZA 
faces competition from other therapies, such as corticosteroids, which have been used on an off-label basis to alleviate some of 
the  symptoms  of  TED.  TEPEZZA  and  KRYSTEXXA  may  face  competition  from  competitor  medicines  currently  in  clinical 
trials. See TEPEZZA and KRYSTEXXA sections above and Government Regulation—Regulation of Orphan Medicines.

9

Reimbursement 

Sales of our products are dependent on the availability and extent of coverage and reimbursement from third-party payers. 
In  many  markets  around  the  world,  these  payers,  including  government  health  systems,  private  health  insurers  and  other 
organizations,  remain  focused  on  reducing  the  cost  of  healthcare;  and  their  efforts  have  intensified,  in  part,  as  a  result  of 
uncertain  macroeconomic  conditions,  rising  healthcare  costs  and  pressures  on  healthcare  budgets.  Drugs  remain  heavily 
scrutinized  for  cost  containment.  As  a  result,  payers  are  becoming  more  restrictive  regarding  the  use  of  biopharmaceutical 
products  and  are  scrutinizing  the  prices  of  these  products  while  requiring  a  higher  level  of  clinical  evidence  to  support  the 
benefits  such  products  bring  to  patients  and  the  broader  healthcare  system.  These  pressures  become  intensified  when  our 
products become subject to competition, including from biosimilars.

In  the  United  States,  healthcare  providers  and  other  entities  such  as  pharmacies  and  PBMs  are  reimbursed  for  covered 
services  and  products  they  deliver  through  both  private-payer  and  government  healthcare  programs  such  as  Medicare  and 
Medicaid. We provide negotiated rebates to healthcare providers, private payers, government payers and PBMs. In addition, we 
are  required  to  (i)  provide  rebates  or  discounts  on  our  products  that  are  reimbursed  through  certain  government  programs, 
including Medicare and Medicaid, and (ii) provide discounts to qualifying healthcare providers under the federal 340B Drug 
Pricing Program.

Both private and some government payers use formularies to manage access to and utilization of drugs. A drug’s inclusion 
and favorable positioning on a formulary are essential to ensure patients have access to a particular drug. Even when access is 
available,  some  patients  abandon  their  prescriptions  for  economic  reasons.  Payers  continue  to  institute  cost  reduction  and 
containment  measures  that  lower  drug  utilization  and/or  spending  altogether  and/or  shift  a  greater  portion  of  the  costs  to 
patients. Such measures include, but are not limited to, more-limited benefit plan designs, higher patient co-pays or coinsurance 
obligations, limitations on patients’ use of commercial manufacturer co-pay payment assistance programs (including through 
co-pay accumulator adjustment or maximization programs), stricter utilization management criteria (such as prior authorization 
and step therapy) before a patient may get access to a drug, higher-tier formulary placement that increases the level of patient 
out-of-pocket costs and formulary exclusion, which effectively encourages patients and providers to seek alternative treatments 
or pay 100% of the cost of a drug. The use of such measures by PBMs and insurers has continued to intensify and has thereby 
limited Amgen product usage and sales. Furthermore, during the past few years, many PBMs and insurers have consolidated, 
resulting in a smaller number of PBMs and insurers overseeing a large portion of total covered lives in the United States. As a 
result,  PBMs  and  insurers  have  greater  market  power  and  negotiating  leverage  to  mandate  stricter  utilization  criteria  and/or 
exclude  drugs  from  their  formularies  in  favor  of  competitor  drugs  or  alternative  treatments.  In  highly  competitive  treatment 
markets such as the markets for ENBREL, Otezla, Repatha and Aimovig, PBMs are also able to exert negotiating leverage by 
requiring incremental rebates from manufacturers in order for them to gain and/or maintain their formulary position.

In addition to market actions taken by private and government payers in the United States, policy makers in both of the 
major  U.S.  political  parties  have  supported  policies  to  lower  drug  costs.  See  Item  1A.  Risk  Factors—Our  sales  depend  on 
coverage and reimbursement from government and commercial third-party payers, and pricing and reimbursement pressures 
have  affected,  and  are  likely  to  continue  to  affect,  our  profitability.  Although  the  IRA  was  enacted  in  August  2022,  the 
environment remains dynamic, and the Administration and Congress continues to consider drug pricing legislation. The IRA 
includes provisions requiring that beginning on January 1, 2026, mandatory price setting be introduced in Medicare for certain 
drugs paid for under Parts B and D, whereby manufacturers must accept a price established by the government or face penalties 
on all U.S. sales (starting with 10 drugs in 2026, adding 15 in 2027 and 2028, and adding 20 in 2029 and subsequent years such 
that by 2031 approximately 100 drugs could be subject to such set prices). In August 2023, ENBREL, a product in which the 
rights to the BLA are held by our wholly owned subsidiary Immunex Corporation, was selected for the first round of 10 drugs 
subject  to  price  setting  that  will  be  applicable  beginning  January  1,  2026.  As  of  January  1,  2024,  Medicare  Part  D  has  been 
redesigned to cap beneficiary out-of-pocket costs and, beginning January 1, 2025, Federal reinsurance will be reduced in the 
catastrophic  phase  (resulting  in  a  shift  and  increase  of  such  costs  to  Part  D  plans  and  manufacturers,  including  by  requiring 
manufacturer discounts on certain drugs). Further, beginning October 1, 2022, manufacturers owe rebates on drugs reimbursed 
under Medicare Part D if price increases outpace inflation, and beginning January 1, 2023, owe rebates on drugs reimbursed 
under Medicare Part B if price increases outpace inflation.

Other  potential  policies  cover  a  wide  range  of  areas,  including  allowing  the  importation  of  drugs  from  other  countries; 
increasing  transparency  in  drug  pricing;  using  third-party  value  assessments  to  determine  drug  prices;  and  changes  to 
government  rebate  programs.  For  example,  on  January  5,  2024,  the  FDA  authorized  Florida  to  move  forward  with  its 
importation  program  proposal,  which  excludes  biologics.  The  Infrastructure  Investment  and  Jobs  Act,  signed  into  law  on 
November 15, 2021, requires manufacturers of certain Part B–covered drugs packaged in single-use containers to give refunds 
to the government starting in 2023 for discarded amounts. CMS also issued a proposed Medicaid Drug Rebate Program rule 
that, if finalized, would require manufacturers to aggregate or “stack” all rebates, discounts or other price concessions made to 
separate, unrelated entities across the pharmaceutical supply chain on a given unit of product to determine the “Best Price,” a 

10

metric that is used to determine Medicaid rebates and 340B statutory rates. Further, at the state level, seven states (Colorado, 
Maine, New Hampshire, Maryland, Minnesota, Oregon and Washington) have enacted laws that establish PDABs to identify 
drugs that pose affordability challenges, and in four states (Colorado, Maryland, Minnesota and Washington) include authority 
for the state PDAB to set upper payment limits on certain drugs for in-state patients, payers, and providers.

In  many  countries  other  than  the  United  States,  government-sponsored  healthcare  systems  are  the  primary  payers  for 
drugs  and  biologics.  With  increasing  budgetary  constraints  and/or  difficulty  in  understanding  the  value  of  medicines, 
governments  and  payers  in  many  countries  are  applying  a  variety  of  measures  to  exert  downward  price  pressure.  These 
measures  can  include  mandatory  price  controls,  price  referencing,  therapeutic-reference  pricing,  increases  in  mandates, 
incentives  for  generic  substitution  and  biosimilar  usage  and  government-mandated  price  cuts.  In  this  regard,  many  countries 
have  health  technology  assessment  organizations  that  use  formal  economic  metrics  such  as  cost-effectiveness  to  determine 
prices, coverage and reimbursement of new therapies; and these organizations are expanding in both established and emerging 
markets.  Many  countries  also  limit  coverage  to  populations  narrower  than  those  specified  on  our  product  labels  or  impose 
volume caps to limit utilization. We expect that countries will continue taking aggressive actions to seek to reduce expenditures 
on drugs and biologics. Similarly, fiscal constraints may also affect the extent to which countries are willing to approve new 
and  innovative  therapies  and/or  allow  access  to  new  technologies.  The  EU  is  currently  undergoing  a  review  and  possible 
revision of its pharmaceutical legislation. Various proposals are now being considered with a possible first reading in the EU 
Parliament in the first quarter of 2024, with full implementation not expected until 2027 or possibly later. The new legislation, 
if implemented, will likely have a significant impact on the landscape for access and pricing decisions within Member States. 
There are both positive and negative aspects to the current proposals being debated within the EU Commission and Parliament, 
including  various  proposals  which  could  alter  the  intellectual  property  protection  regime  in  Europe.  Nevertheless,  the 
legislation, if implemented, is unlikely to significantly impact the difficult financial situation facing many Member States and 
is, therefore, not likely to improve the overall business climate for biopharmaceutical firms operating in the EU.

The dynamics and developments discussed above create pressures on the pricing and potential usage of our products and 
on the industry. Given the diverse interests in play between payers, biopharmaceutical manufacturers, policy makers, healthcare 
providers and independent organizations, if and whether the parties involved can achieve alignment on the matters discussed 
above remain unclear, and the outcome of any such alignment is difficult to predict. We remain focused on pricing our products 
responsibly and delivering breakthrough treatments for unmet medical needs. Amgen is committed to working with the entire 
healthcare community to ensure continued innovation and to facilitate patient access to needed medicines. We do this by:

•

•

•

•

•

•

•

investing billions of dollars annually in R&D;

pricing our medicines to reflect the value they provide;

developing more affordable therapeutic choices in the form of high-quality and reliably supplied biosimilars;

partnering with payers to share risk and accountability for health outcomes;

providing patient support and education programs; 

helping patients in financial need access our medicines; and

working with policy makers, patients and other stakeholders to establish a sustainable healthcare system with access to 
affordable care and in which patients and their healthcare professionals are the primary decision makers.

See Item 1A. Risk Factors—Our sales depend on coverage and reimbursement from government and commercial third-
party payers, and pricing and reimbursement pressures have affected, and are likely to continue to affect, our profitability and 
Item  1A.  Risk  Factors—Guidelines  and  recommendations  published  by  various  organizations  can  reduce  the  use  of  our 
products.

Manufacturing, Distribution and Raw Materials

Manufacturing

We believe we are a leader in the manufacture of biologics and that our manufacturing capabilities represent a competitive 
advantage. The products we manufacture consist of both biologics and small molecule drugs. The majority of our products are 
biologics  that  are  produced  in  living  cells  and  that  are  inherently  complex  due  to  naturally  occurring  molecular  variations. 
Highly  specialized  knowledge  and  extensive  process  and  product  characterization  are  required  to  transform  laboratory-scale 
processes  into  reproducible  commercial  manufacturing  processes.  Further,  our  expertise  in  the  manufacture  of  biologics 
positions us well for leadership in the global biosimilars market. For additional information regarding manufacturing facilities, 
see Item 2. Properties.

11

We have been innovating our manufacturing facilities designed to extend our manufacturing advantage by optimizing our 
manufacturing network and/or by mitigating risks while continuing to ensure adequate supply of our products. For example, our 
licensed  next-generation  biomanufacturing  plants  operating  in  Singapore  and  West  Greenwich,  Rhode  Island,  incorporate 
multiple innovative technologies into a single facility. Next-generation biomanufacturing plants require smaller manufacturing 
footprints  and  offer  greater  environmental  benefits,  including  reduced  consumption  of  water  and  energy  and  lower  levels  of 
carbon emissions. Within such plants, the equipment is portable and smaller, which provides greater flexibility and speed in the 
manufacture of different medicines simultaneously. This enables Amgen to respond to changing demands for its medicines with 
increased agility. The Singapore site also has a plant that has been approved by several agencies, including the FDA and EMA, 
to produce small molecule drugs for commercial manufacturing.

Our  internal  manufacturing  network  has  commercial  production  capabilities  for  bulk  manufacturing,  formulation,  fill, 
finish,  tableting  and  device  assembly.  These  activities  are  performed  within  the  United  States  and  its  territory  in  our  Puerto 
Rico, Rhode Island and California facilities as well as internationally in our Ireland, Netherlands and Singapore facilities. In 
addition, we use third-party contract manufacturers to supplement the capacity or capability of our commercial manufacturing 
network.

To support our clinical trials, we manufacture product candidates primarily at our California facilities. We also use third-

party contract manufacturers to supplement the capacity or capability of our overall clinical manufacturing network.

See Item 1A. Risk Factors for a discussion of the factors that could adversely impact our manufacturing operations and 

the global supply of our products.

Distribution

We operate distribution centers in Puerto Rico, Kentucky, California and the Netherlands for worldwide distribution of 
the  majority  of  our  commercial  and  clinical  products.  We  also  use  third-party  distributors  to  supplement  distribution  of  our 
products worldwide.

Other

In addition to the manufacturing and distribution activities noted above, each of our manufacturing locations includes key 
manufacturing  support  functions  such  as  quality  control,  process  development,  engineering,  procurement,  production 
scheduling and warehousing. Certain of those manufacturing and distribution activities are highly regulated by the FDA as well 
as  international  regulatory  agencies.  See  Government  Regulation—Regulation  in  the  United  States—Regulation  of 
Manufacturing Standards.

Manufacturing Initiatives

As discussed above, we have been expanding capacity and advancing new innovations with multiple ongoing projects.

Our  next-generation  biomanufacturing  plant  at  our  West  Greenwich,  Rhode  Island,  campus,  the  first  of  its  kind  in  the 
United States, has been approved by the FDA and EMA. This plant expands our capacity to manufacture certain products for 
U.S. and global markets, as we receive regulatory approval in those markets.

In November 2021, we broke ground for our newest biomanufacturing plant located in New Albany, Ohio, which received 
FDA licensure for commercial production in January 2024. This final product assembly and packaging plant will support the 
growing demand for Amgen’s medicines and will use state-of-the-art technologies.

In March 2022, we broke ground for our new multi-product drug substance manufacturing facility in Holly Springs, North 
Carolina.  The  new  plant  will  support  both  traditional  stainless  steel-fed  batch  manufacturing  and  next-generation  single-use 
technologies, allowing flexibility in the production of multiple products in one plant.

Subsequent  to  the  Horizon  acquisition,  we  are  evaluating  Horizon’s  supply  chains  and  pursuing  activities  to  further 
improve  resiliency  and  efficiency.  See  Item  1A.  Risk  factors—Our  efforts  to  collaborate  with  or  acquire  other  companies, 
products,  or  technology,  and  to  integrate  the  operations  of  companies  or  to  support  the  products  or  technology  we  have 
acquired,  may  not  be  successful,  and  may  result  in  unanticipated  costs,  delays  or  failures  to  realize  the  benefits  of  the 
transactions.

Amgen continues to embed environmental sustainability into the upfront design, development and execution of our new 
facilities. The new facility under construction in North Carolina and our recently FDA approved facility in Ohio contain many 
examples of environmental advances, including on-site photovoltaic renewable energy generation at both sites. We expect our 
North Carolina facility’s carbon, waste and water footprints to be substantially lower than those at a traditional drug substance 

12

manufacturing  plant,  and  we  expect  lower  footprints  per  unit  produced  as  well  at  our  Ohio  facility  compared  with  existing 
similar facilities.

See Item 1A. Risk Factors—Manufacturing difficulties, disruptions or delays could limit supply of our products and limit 

our product sales.

Raw Materials and Medical Devices

Certain raw materials, medical devices (including companion diagnostics) and components necessary for the commercial 
and/or  clinical  manufacturing  of  our  products  are  provided  by  and  are  the  proprietary  products  of  unaffiliated  third-party 
suppliers, certain of which may be our only sources for such materials. We currently attempt to manage the risk associated with 
such  suppliers  by  means  of  inventory  management,  relationship  management  and  evaluation  of  alternative  sources  when 
feasible. We also monitor the financial condition of certain suppliers and their ability to supply our needs. See Item 1A. Risk 
Factors—We rely on third-party suppliers for certain of our raw materials, medical devices and components.

We perform various procedures to help authenticate the sources of raw materials, including intermediary materials used in 
the  manufacture  of  our  products;  the  procedures  include  verification  of  country  of  origin  and  are  incorporated  into  the 
manufacturing processes we and our third-party contract manufacturers perform.

To  better  ensure  supply,  Amgen  has  a  risk  mitigation  strategy  that  uses  a  combination  of  methods,  including  multiple 
sources or backup inventory of critical raw materials. As part of our ongoing business continuity efforts, we continue to closely 
monitor  our  inventory  levels  and  have  taken  additional  measures  to  mitigate  against  raw  material  supply  interruption.  See 
Item 1A. Risk Factors for a discussion of the factors that could adversely impact our manufacturing operations and the global 
supply of our products.

Government Regulation

Regulation by government authorities in the United States and other countries is a significant factor in the production and 
marketing of our products and our ongoing R&D activities. To clinically test, manufacture and market products for therapeutic 
use,  we  must  satisfy  mandatory  procedures  and  safety  and  effectiveness  standards  established  by  various  regulatory  bodies. 
Compliance  with  these  standards  is  complex,  and  failure  to  comply  with  any  of  these  standards  can  result  in  significant 
implications. See Item 1A. Risk Factors for a discussion of factors, including global regulatory implications, that can adversely 
impact our development and marketing of commercial products.

Regulation in the United States

In  the  United  States,  the  Public  Health  Service  Act;  the  FDCA;  and  the  regulations  promulgated  thereunder  as  well  as 
other  federal  and  state  statutes  and  regulations  govern,  among  other  things,  the  production,  research,  development,  testing, 
manufacture,  quality  control,  labeling,  storage,  record  keeping,  approval,  advertising,  promotion  and  distribution  of  our 
products in addition to the reporting of certain payments and other transfers of value to healthcare professionals and teaching 
hospitals.

Clinical Development and Product Approval. Drug development in our industry is complex, challenging and risky, and 
failure  rates  are  high.  Product  development  cycles  are  typically  very  long—approximately  10  to  15  years  from  discovery  to 
market. A potential new medicine must undergo many years of preclinical and clinical testing to establish its safety and efficacy 
for  use  in  humans  at  appropriate  dosing  levels  and  with  an  acceptable  risk–benefit  profile.  We  continue  to  work  toward 
reducing cycle times by applying our expertise in human genetics and innovation in technology, clinical trials and real-world 
evidence.

After  laboratory  analysis  and  preclinical  testing  in  animals,  we  file  an  IND  with  the  FDA  to  begin  human  testing. 

Typically, we undertake an FDA-designated three-phase human clinical testing program.

•

•

•

In phase 1, we conduct small clinical trials to investigate the safety and proper dose ranges of our product candidates in a 
small number of human subjects.

In  phase  2,  we  conduct  clinical  trials  to  investigate  side-effect  profiles  and  the  efficacy  of  our  product  candidates  in  a 
patient population larger than phase 1 but still relatively small, who have the disease or condition under study.

In phase 3, we conduct clinical trials to investigate the short- and long-term safety and efficacy of our product candidates, 
compared to commonly used treatments, in a large number of patients who have the disease or condition under study.

The FDA monitors the progress of each trial conducted under an IND and may, at its discretion, reevaluate, alter, suspend 
or  terminate  the  testing  based  on  data  accumulated  to  that  point  and  the  FDA’s  risk–benefit  assessment  with  regard  to  the 

13

patients enrolled in the trial. The results of preclinical and clinical trials are submitted to the FDA in the form of either a BLA 
for biologic products or a New Drug Application for small molecule products. We are not permitted to market or promote a new 
product until the FDA has approved our marketing application.

Approval of Biosimilars. The Affordable Care Act authorized the FDA to approve biosimilars via a separate, abbreviated 
pathway. The pathway allows sponsors of a biosimilar to seek and obtain regulatory approval based in part on the nonclinical-
trial and clinical-trial data of an originator product to which the biosimilar has been demonstrated to be “highly similar” and to 
have no clinically meaningful differences with regard to safety, purity and potency. The relevance of demonstrating “similarity” 
is that in many cases, biosimilars can be brought to market without conducting the full suite of clinical trials typically required 
of  originators,  because  risk–benefit  has  previously  been  established.  To  preserve  incentives  for  future  innovation,  the  law 
establishes a period of exclusivity for originators’ products, which in general prohibits biosimilars from gaining FDA approval 
based in part on reliance on or reference to the originator’s data in their application to the FDA for 12 years after initial FDA 
approval of the originator product. The law does not change the duration of patents granted on biologic products. As part of the 
implementation of the abbreviated approval pathway for biosimilars, the FDA released a number of guidance documents, some 
of which remain in draft form. See Item 1A. Risk Factors—We currently face competition from biosimilars and generics and 
expect to face increasing competition from biosimilars and generics in the future.

Regulation of Product Marketing and Promotion. The FDA regulates the marketing and promotion of drug products. Our 
product  promotions  for  approved  product  indications  must  comply  with  the  statutory  standards  of  the  FDCA  and  the  FDA’s 
implemented  regulations  and  guidance.  The  FDA’s  review  of  marketing  and  promotional  activities  encompasses  but  is  not 
limited  to  direct-to-consumer  advertising,  healthcare-provider-directed  advertising  and  promotion,  sales  representative 
communications to healthcare professionals, promotional programming and promotional activities involving electronic media. 
The FDA may also review industry-sponsored scientific and educational activities that make representations regarding product 
safety  or  efficacy  in  a  promotional  context.  The  FDA  may  take  enforcement  action  against  a  company  for  violations  of  the 
FDA’s  advertising  and  labeling  laws  and  regulations.  Enforcement  action  may  include  product  seizures,  injunctions,  civil  or 
criminal  penalties  or  regulatory  letters,  which  may  require  corrective  advertising  or  other  corrective  communications  to 
healthcare professionals. Failure to comply with the FDA’s regulations also can result in adverse publicity or increased scrutiny 
of  company  activities  by  the  U.S.  Congress  or  other  legislators.  Additionally,  as  described  below,  such  failure  may  lead  to 
additional liability under U.S. healthcare fraud and abuse laws.

Regulation  of  Manufacturing  Standards.  The  FDA  regulates  and  inspects  the  equipment,  facilities,  laboratories  and 
processes  used  in  the  manufacturing  and  testing  of  products  prior  to  granting  approval  to  market  products.  If  after  receiving 
approval  from  the  FDA  we  make  a  material  change  in  manufacturing  equipment,  location  or  process,  additional  regulatory 
review  may  be  required.  We  also  must  adhere  to  current  Good  Manufacturing  Practice  regulations  and  product-specific 
regulations  enforced  by  the  FDA  through  its  facilities  inspection  program.  The  FDA  conducts  regular,  periodic  visits  to 
reinspect our equipment, facilities, laboratories and processes following an initial approval.

Regulation  of  Combination  Products.  Combination  products  are  defined  by  the  FDA  as  products  composed  of  two  or 
more  regulated  components  (e.g.,  a  biologic  and/or  drug  and  a  device).  Biologics/drugs  and  devices  each  have  their  own 
regulatory  requirements,  and  combination  products  may  have  additional  requirements.  A  number  of  our  marketed  products 
meet this definition and are regulated under this framework, and we expect that a number of our pipeline product candidates 
will be evaluated for regulatory approval under this framework as well.

Regulation  of  Orphan  Medicines.  Orphan  drugs  are  defined  by  the  FDA  as  products  intended  to  treat  a  rare  disease  or 
condition that affects less than 200,000 persons in the United States. A company must request orphan drug designation prior to 
filing and, if granted for being the first medicine to treat such a rare disease, means the FDA will not approve another sponsor’s 
marketing application for the same drug for the same indication for seven years. Orphan drug exclusivity will not bar approval 
of  another  medicine  for  the  same  indication  if  it  is  shown  to  be  clinically  superior.  In  the  United  States,  a  number  of  our 
products,  including  products  such  as  TEPEZZA  and  UPLIZNA  acquired  in  connection  with  the  Horizon  acquisition,  have 
orphan drug exclusivity under this framework.

Regulation outside the United States

In EU countries as well as in the United Kingdom, Switzerland, Canada, Australia and Japan, regulatory requirements and 

approval processes are similar in principle to those in the United States.

In the EU, there are currently two potential tracks for seeking marketing approval for a product not authorized in any EU 
member state: a decentralized procedure and a centralized procedure. In the decentralized procedure, identical applications for 
marketing  authorization  are  submitted  simultaneously  to  the  national  regulatory  agencies.  Regulatory  review  is  led  by  one 
member  state  (the  reference-member  state),  and  its  assessment—based  on  safety,  quality  and  efficacy—is  reviewed  and 
approved  (assuming  there  are  no  concerns  that  the  product  poses  a  serious  risk  to  public  health)  by  the  other  member  states 

14

from which the applicant is seeking approval (the concerned-member states). The decentralized procedure leads to a series of 
single national approvals in all relevant countries. In the centralized procedure, which is required of all products derived from 
biotechnology, a company submits a single MAA to the EMA, which conducts an evaluation of the dossier, drawing upon its 
scientific  resources  across  Europe.  If  the  drug  product  is  proven  to  fulfill  requirements  for  quality,  safety  and  efficacy,  the 
EMA’s  CHMP  adopts  a  positive  opinion,  which  is  transmitted  to  the  EC  for  final  decision  on  granting  of  the  marketing 
authorization.  Even  though  the  EC  generally  follows  the  CHMP’s  opinion,  it  is  not  bound  to  do  so.  Subsequent 
commercialization is enabled by country-by-country reimbursement approval.

In the EU, biosimilars are approved under a specialized pathway of the centralized procedure. As with the U.S. pathway, 
an applicant seeks and obtains regulatory approval for a biosimilar once the data exclusivity period for the original reference 
product  has  expired,  relying  in  part  on  the  data  submitted  for  the  originator  product  together  with  data  evidencing  that  the 
biosimilar  is  “highly  similar”  with  regard  to  quality,  safety  and  efficacy  to  the  original  reference  product  authorized  in  the 
European Economic Area. See Item 1A. Risk Factors—We currently face competition from biosimilars and generics and expect 
to face increasing competition from biosimilars and generics in the future.

In the EU, Regulation (EC) No 141/2000, as implemented by Regulation (EC) No. 847/2000, provides that a medicine can 
be  designated  as  an  orphan  medicinal  product  by  the  EC  if  its  sponsor  can  establish  that:  (i)  the  product  is  intended  for  the 
diagnosis, prevention or treatment of life-threatening or chronically debilitating conditions; (ii) either (a) such conditions affect 
not more than 5 in 10,000 persons in the EU when the application is made, or (b) the product without the benefits derived from 
orphan status, would not generate sufficient return in the EU to justify the necessary investment in developing the medicinal 
product; and (iii) there exists no satisfactory authorized method of diagnosis, prevention, or treatment of the condition that has 
been  authorized  in  the  EU,  or  even  if  such  method  exists,  the  product  will  be  of  significant  benefit  to  those  affected  by  that 
condition. An application for the designation of a medicinal product as an orphan medicinal product may be submitted at any 
stage  of  development  of  the  medicinal  product  but  before  the  filing  of  an  MAA.  A  marketing  authorization  for  an  orphan 
medicinal product may only include indications designated as orphan. For non-orphan indications treated with the same active 
pharmaceutical ingredient, a separate marketing authorization has to be sought. Approved orphan drugs in the EU receive 10 
years of market exclusivity for the approved indication in all EU member states. We currently have orphan medicinal product 
designation for BLINCYTO in the EU and intend to seek medicinal product designation for a number of our products in the 
future.

Other countries such as those in Latin America and the Middle East have review processes and data requirements similar 
to  those  of  the  EU  and  in  some  cases  can  rely  on  prior  marketing  approval  from  U.S.  or  EU  regulatory  authorities.  The 
regulatory  process  in  these  countries  may  include  manufacturing/testing  facility  inspections,  testing  of  drug  product  upon 
importation and other domestic requirements.

In Asia Pacific, a number of countries such as China, Japan, South Korea and Taiwan may require local clinical-trial data 
for bridging purposes as part of the drug registration process in addition to global clinical trials, which can add to overall drug 
development and registration timelines. In most of the Asian markets, registration timelines depend on marketing approval in 
the United States or the EU. In some markets in Asia, such as China, Indonesia and Thailand, regulatory timelines can be less 
predictable.  The  regulatory  process  may  also  include  manufacturing/testing  facility  inspections,  testing  of  drug  product  upon 
importation  and  other  domestic  requirements.  Countries  such  as  Australia  and  Japan  have  more-mature  systems  that  would 
allow  for  submissions  under  more-competitive  time  frames.  With  regard  to  biosimilars,  several  of  these  countries  have 
pathways  to  register  biosimilars  (e.g.,  Australia,  India,  Singapore,  South  Korea  and  Taiwan),  and  biosimilar  products  are 
already present on the markets (e.g., Australia and South Korea).

In  some  countries,  such  as  Japan  and  those  in  the  EU,  medical  devices  may  be  subject  to  regulatory  regimes  whereby 
manufacturers must establish that their medical devices conform to essential requirements set out in the law for the particular 
device  category.  For  example,  in  the  EU,  with  limited  exceptions,  medical  devices  placed  on  the  market  must  bear  the 
Conformité Européenne marking to indicate their conformity with legal requirements.

15

Postapproval Phase

After approval, we continue to monitor adverse events and product complaints reported following the use of our products 
through  routine  postmarketing  surveillance  and  studies  when  applicable.  We  report  such  events  to  the  appropriate  regulatory 
agencies as required by local regulations for individual cases and aggregate reports. We proactively monitor (according to good 
pharmacovigilance practices) and ensure the implementation of signal detection, assessment and the communication of adverse 
events that may be associated with the use of our products. We also proactively monitor product complaints through our quality 
systems, which includes assessing our drug delivery devices for device complaints, adverse events and malfunctions. We may 
also  be  required  by  regulatory  agencies  to  conduct  further  clinical  trials  on  our  marketed  products  as  a  condition  of  their 
approval or to provide additional information on safety and efficacy. Health regulators, including the FDA, have authority to 
mandate labeling changes to products at any point based on new safety information or as part of an evolving label change to a 
particular class of products.

Health  regulators,  including  the  FDA,  also  have  authority  both  before  and  after  approval  to  require  that  a  company 
implement  a  risk  management  program  for  a  product  to  ensure  that  the  benefits  of  the  drug  outweigh  the  risks.  Each  risk 
management  program  is  unique  and  varies  depending  on  the  specific  factors  required.  In  the  United  States,  such  a  risk 
management program is known as a REMS, and we currently have REMSs for Prolia, Nplate and BLINCYTO.

Other Regulation

We are also subject to various laws pertaining to healthcare fraud and abuse, including antikickback laws and false-claims 
laws.  Antikickback  laws  make  it  illegal  to  solicit,  offer,  receive  or  pay  any  remuneration  in  exchange  for  or  to  induce  the 
referral of business, including the purchase or prescribing of a particular drug that is reimbursed by a state or federal program. 
False-claims  laws  prohibit  knowingly  and  willingly  presenting  or  causing  to  be  presented  for  payment  to  third-party  payers 
(including Medicare and Medicaid) any 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. Violations of fraud and abuse laws may 
be punishable by criminal and/or civil sanctions, including fines and civil monetary penalties, as well as by the possibility of 
exclusion  from  federal  healthcare  programs  (including  Medicare  and  Medicaid).  Liability  under  false-claims  laws  may  also 
arise  when  violation  of  certain  laws  or  regulations  related  to  the  underlying  product  (e.g.,  a  violation  regarding  improper 
promotional activity or unlawful payments) contributes to the submission of a false claim.

On  April  25,  2019,  we  entered  into  a  settlement  agreement  with  the  DOJ  and  the  OIG  of  the  HHS  to  settle  certain 
allegations  related  to  our  support  of  independent  charitable  organizations  that  provide  patients  with  financial  assistance  to 
access medicines. Additionally, we entered into a corporate integrity agreement that requires us to both maintain a corporate 
compliance program and undertake a set of defined corporate integrity obligations for a period of five years. Due to the breadth 
of the statutory provisions and the absence of guidance in the form of regulations or court decisions addressing some of our 
practices, it is possible that in the future, our practices might be further challenged under antikickback or similar laws. 

The  FCPA  prohibits  U.S.  corporations  and  their  representatives  from  offering,  promising,  authorizing  or  making 
payments to any foreign government official, government staff member, political party or political candidate in an attempt to 
obtain or retain business abroad. The scope of the FCPA arguably includes interactions with certain healthcare professionals in 
many countries. Other countries have enacted similar anticorruption laws and/or regulations. Failure by our employees, agents, 
contractors,  vendors,  licensees,  partners  or  collaborators  to  comply  with  the  FCPA  and  other  anticorruption  laws  and/or 
regulations could result in significant civil or criminal penalties.

We  are  subject  to  various  laws  and  regulations  globally  with  regard  to  privacy  and  data  protection.  These  laws  and 
regulations involve the collection, storage, handling, use, disclosure, transfer and security of personal data. The legislative and 
regulatory environments regarding privacy and data protection are continually evolving and developing because these issues are 
subjects of increasing amounts of attention in countries globally. For example, we are subject to the EU’s GDPR, which became 
effective on May 25, 2018; the CCPA, which became effective on January 1, 2020; the California Privacy Rights Act of 2020, 
which amended the CCPA and became effective on January 1, 2023; and China’s Personal Information Protection Law, which 
became effective on November 1, 2021. Other jurisdictions where we operate have enacted or proposed similar legislation and/
or  regulations,  such  as  consumer  privacy  laws  that  went  into  effect  in  Virginia,  Colorado,  Utah,  Connecticut  and  Florida  in 
2023. Consumer privacy laws were also passed in 11 other states, with the earliest effective dates later this year, and proposed 
in three additional states. In April 2023, a new type of state privacy law focused on protection of consumer health data emerged 
in Washington with the enactment of the My Health My Data Act, with similar legislation passed subsequently in Nevada. Both 
these new consumer health privacy laws become effective March 31, 2024. Failure to comply with these current and future laws 
could result in significant penalties.

Our  business  has  been  and  will  continue  to  be  subject  to  various  other  U.S.  and  foreign  laws,  rules  and  regulations, 

including provisions of the IRA. See Reimbursement section above.

16

Research and Development and Selected Product Candidates

We  focus  our  R&D  on  novel  human  therapeutics  for  the  treatment  of  serious  illness.  We  capitalize  on  our  strengths  in 
human  genetics,  novel  biology  and  protein  engineering.  We  leverage  our  biologic  expertise  and  seek  to  choose  the  optimal 
modality for a drug target and disease. And we use cutting-edge science and technology to study subtle biological mechanisms 
in search of therapies that will improve the lives of those who suffer from diseases.

Our discovery research programs may therefore yield targets that lead to the development of human therapeutics delivered 
as large molecules, small molecules, other combination modalities or new modalities. We have reshaped our portfolio and have 
increasingly focused our efforts on human genetics when possible to enhance the likelihood of success.

With regard to our clinical trial activities, we are continuously monitoring the possible impacts from health-related events, 
including changes from new COVID-19 variants; we are working to mitigate effects on future study enrollment in our clinical 
trials; and we are evaluating the impact in all relevant countries. We remain focused on supporting our active clinical sites in 
their providing care for patients and in our providing investigational drug supply.

For  the  years  ended  December  31,  2023,  2022  and  2021,  our  R&D  expenses  were  $4.8  billion,  $4.4  billion  and  $4.8 

billion, respectively.

We have major R&D centers in Thousand Oaks and San Francisco, California, and Deerfield, Illinois; Iceland; and the 

United Kingdom, as well as smaller research centers and development facilities globally. See Item 2. Properties.

Our clinical trial activities are conducted by both our internal staff and third-party contract clinical trial service providers. 
To increase the number and diversity of patients available for enrollment in our clinical trials, we have opened clinical sites and 
will continue opening clinical sites and enrolling patients in a number of geographic locations. See Government Regulation—
Regulation in the United States—Clinical Development and Product Approval for a discussion of government regulation over 
clinical development. Also see Item 1A. Risk Factors—We must conduct clinical trials in humans before we commercialize and 
sell any of our product candidates or existing products for new indications.

Some of our competitors are actively engaged in R&D in areas in which we have products or in which we are developing 
product  candidates  or  new  indications  for  existing  products.  For  example,  we  compete  with  other  clinical  trials  for  eligible 
patients,  which  may  limit  the  number  of  available  patients  who  meet  the  criteria  for  certain  clinical  trials.  The  competitive 
marketplace  for  our  product  candidates  is  greatly  dependent  on  the  timing  of  entry  into  the  market.  Early  entry  may  have 
important  advantages  in  gaining  product  acceptance,  thereby  contributing  to  a  product’s  eventual  success  and  profitability. 
Accordingly, we expect that in some cases, the relative speed with which we can develop products, complete clinical testing, 
receive regulatory approval and supply commercial quantities of a product to the market will be important to our competitive 
position.

In addition to product candidates and marketed products generated from our internal R&D efforts, we acquire companies, 
acquire and license certain product and R&D technology rights and establish R&D arrangements with third parties to enhance 
our  strategic  position  within  our  industry  by  strengthening  and  diversifying  our  R&D  capabilities,  product  pipeline  and 
marketed product base. In pursuing these R&D arrangements and licensing or acquisition activities, we face competition from 
other  pharmaceutical  and  biotechnology  companies  that  also  seek  to  license  or  acquire  technologies,  product  candidates  or 
marketed products from those entities performing the R&D.

The  following  table  shows  a  selection  of  certain  of  our  product  candidates  by  phase  of  development  in  our  therapeutic 
areas of focus as of January 31, 2024, unless otherwise indicated. Additional product candidate information can be found on our 
website at www.amgen.com. (The website address is not intended to function as a hyperlink, and the information contained on 
our website is not intended to be a part of this filing.) The information in this section does not include other, nonregistrational 
clinical trials that we may conduct for purposes other than for submission to regulatory agencies for their approval of a new 
product indication.

We  may  conduct  nonregistrational  clinical  trials  for  various  reasons,  including  to  evaluate  real-world  outcomes  or  to 

collect additional safety information with regard to the use of products.

17

Molecule

Phase 3 programs

AMJEVITA

Bemarituzumab

BLINCYTO

Dazodalibep

EVENITY

Investigational indication

Interchangeability

GEJ adenocarcinoma

Ph-negative B-cell precursor acute lymphoblastic leukemia

Sjögren’s Syndrome

Male osteoporosis

LUMAKRAS/LUMYKRAS

Advanced colorectal cancer; NSCLC

Nplate

Olpasiran

Otezla

Repatha

Rocatinlimab

Tarlatamab

TEPEZZA

TEZSPIRE

UPLIZNA

Wezlana

ABP 206

ABP 938

ABP 959

Phase 2 programs

Bemarituzumab

Daxdilimab

Efavaleukin alfa
Fipaxalparant

Chemotherapy-induced thrombocytopenia

Cardiovascular disease

Palmoplantar pustulosis 

Cardiovascular disease

Atopic dermatitis

Small cell lung cancer

Active TED in Japan; Chronic/Low CAS TED in Japan

Chronic rhinosinusitis with nasal polyps; Eosinophilic esophagitis; Severe asthma

IgG4-related disease; Myasthenia gravis

Investigational biosimilar to STELARA (ustekinumab)

Investigational biosimilar to OPDIVO (nivolumab)

Investigational biosimilar to EYLEA (aflibercept)

Investigational biosimilar to SOLIRIS (eculizumab)

Other tumors

Dermatomyositis or anti-synthetase inflammatory myositis; discoid lupus erythematosus

Ulcerative colitis

Diffuse cutaneous systemic sclerosis; idiopathic pulmonary fibrosis

LUMAKRAS/LUMYKRAS

Other solid tumors with KRAS G12C mutations

Maridebart cafraglutide

Ordesekimab
TEZSPIRE

Phase 1 programs

Bemarituzumab

Tarlatamab
TEPEZZA

Xaluritamig

AMG 104

AMG 193

AMG 305

AMG 329

AMG 355

AMG 651

AMG 786

AMG 794

Obesity

Celiac disease

Chronic obstructive pulmonary disease; Chronic spontaneous urticaria

NSCLC

Neuroendocrine prostate cancer

Subcutaneous administration for TED

Prostate cancer

Asthma

Solid tumors

Solid tumors

Autoimmune disease

Solid tumors

Solid tumors

Obesity

Solid tumors

18

Phase 3

Phase 2

Phase 1

Clinical trials investigate the short- and long-term safety and efficacy of our product candidates, compared to commonly used 
treatments, in a large number of patients who have the disease or condition under study.
Clinical trials investigate side-effect profiles and efficacy of product candidates in a larger patient population than phase 1, but 
still relatively small, who have the disease or condition under study.
Clinical trials investigate the safety and proper dose ranges of product candidates in a small number of human subjects.

Phase 3 Product Candidate Program Changes

As of January 31, 2023, we had 18 phase 3 programs. As of January 31, 2024, we have 24 phase 3 programs, as five phase 
3 programs were acquired from Horizon, three programs initiated phase 3 studies, one program was approved by the FDA and 
one program concluded. These changes are set forth in the following table.

Molecule
Dazodalibep

KYPROLIS

LUMAKRAS/LUMYKRAS

Investigational indication
Sjögren’s Syndrome
Weekly dosing for relapsed multiple 
myeloma
NSCLC in combination with chemotherapy

Program change
Horizon acquired program
Concluded—program did not meet its 
primary endpoint
Initiated phase 3 study

Otezla

Tarlatamab

TEPEZZA

UPLIZNA

ABP 206

Genital psoriasis

Small cell lung cancer
Active TED (OPTIC-J); Chronic/Low CAS 
TED in Japan

Approved by the FDA

Initiated phase 3 study

Horizon acquired programs

IgG4-related disease; Myasthenia gravis
Biosimilar to OPDIVO

Horizon acquired programs

Initiated phase 3 study

Phase 3 Product Candidate Patent Information

The following table describes our composition-of-matter patents that have been issued thus far for our product candidates 
in phase 3 development that have yet to be approved for any indication in the United States or the EU. Patents for products 
already approved for one or more indications in the United States or the EU but that are currently undergoing phase 3 clinical 
trials for additional indications have been previously described. See Marketing, Distribution and Selected Marketed Products—
Patents.

Molecule

Territory

General subject matter

Estimated expiration*

Bemarituzumab

Dazodalibep

Olpasiran

Rocatinlimab

Tarlatamab

U.S.

Europe
U.S.

Europe
U.S.

Europe
U.S.

Europe

U.S.

Europe

Polypeptides

Polypeptides
Polypeptides

Polypeptides
Compounds

Compounds
Polypeptides

Polypeptides

Polypeptides

Polypeptides

2029

2029
2034

2032
2036

2036
2027

2026

2036

2036

*  Patent  expiration  estimates  are  based  on  issued  patents,  which  may  be  challenged,  invalidated  or  circumvented  by 
competitors. The estimates do not include any term adjustments, extensions or supplemental protection certificates that may 
be obtained in the future and thereby extend these dates. Corresponding patent applications are pending in other jurisdictions. 
Additional  patents  may  be  filed  or  issued  and  may  provide  additional  exclusivity  for  the  product  candidate  or  its  use.  In 
addition  to  patent  exclusivity,  the  product  candidates  may  be  protected  by  regulatory  exclusivities  upon  approval  in  some 
countries. For example, new chemical entities would receive a five year exclusivity period and new molecular entities would 
receive a 12 year exclusivity period in the United States, whereas new chemical and molecular entities would receive a 10 
year exclusivity period in Europe.

19

Phases 3 and 2 Program Descriptions

The  following  provides  additional  information  about  selected  products  and  product  candidates  that  have  advanced  into 

human clinical trials.

AMJEVITA

AMJEVITA is a biosimilar to HUMIRA, which is a monoclonal antibody that inhibits binding of tumor necrosis factor 

(TNF) alpha to cell surface TNF receptor / TNF-alpha.

Bemarituzumab

Bemarituzumab  is  a  monoclonal  antibody  that  inhibits  fibroblast  growth  factor  receptor  2b  (FGFR2b).  It  is  being 
investigated for the treatment of advanced gastroesophageal junction (GEJ) adenocarcinoma and advanced solid tumors other 
than advanced squamous NSCLC.

BLINCYTO

BLINCYTO is an anti-CD19 x anti-CD3 BiTE® molecule. It is being investigated in newly diagnosed adults aged 40 and 

older with Ph negative B-cell precursor ALL.

Daxdilimab

Daxdilimab  is  a  fully  human  monoclonal  antibody  against  ILT7  that  depletes  certain  dendritic  cells.  It  is  being 
investigated  for  the  treatment  of  both  dermatomyositis  and  anti-synthetase  inflammatory  myositis  and  discoid  lupus 
erythematosus.

Dazodalibep

Dazodalibep is a fusion protein binding CD40L on T cells, blocking their interaction with CD40-expressing B cells. It is 

being investigated for the treatment of Sjögren’s syndrome.

Efavaleukin alfa

Efavaleukin alfa is an interleukin (IL)-2 mutein Fc fusion protein. It is being investigated for the treatment of ulcerative 

colitis.

EVENITY

EVENITY  is  a  monoclonal  antibody  that  inhibits  the  action  of  sclerostin.  It  is  being  evaluated  as  a  treatment  for  male 

osteoporosis. EVENITY is being developed in collaboration with UCB.

Fipaxalparant

Fipaxalparant  is  a  molecule  that  blocks  lysophosphatidic  acid  receptor  1  (LPAR1).  It  is  being  investigated  for  the 

treatment of diffuse cutaneous systemic sclerosis and idiopathic pulmonary fibrosis.

LUMAKRAS/LUMYKRAS

LUMAKRAS/LUMYKRAS is a KRASG12C small molecule inhibitor. It is being investigated as treatment for a variety of 

solid tumors, including NSCLC, colorectal cancer and other solid tumor cancers.

In October 2023, we announced positive data from the global Phase 3 CodeBreaK 300 trial. This global Phase 3 study 
evaluated  two  doses  of  LUMAKRAS/LUMYKRAS  (960  mg  or  240  mg)  in  combination  with  Vectibix  versus  investigator’s 
choice of therapy (trifluridine and tipiracil, or regorafenib) in patients with chemorefractory G12C-mutated mCRC.

In  June  2023,  based  on  data  from  the  previous  CodeBreaK  101  study,  the  FDA  granted  Breakthrough  Therapy 
Designation to LUMAKRAS in combination with Vectibix for the treatment of patients with metastatic KRAS G12C-mutated 
CRC, as determined by an FDA approved test, who have received prior chemotherapy.

20

Maridebart cafraglutide

Maridebart  cafraglutide  is  a  gastric  inhibitory  polypeptide  receptor  (GIPR)  antagonist  and  glucagon-like  peptide  1 

(GLP-1) receptor agonist. It is being investigated for the treatment of obesity.

Nplate

Nplate is a thrombopoietin receptor agonist (TPO-RA). It is being investigated for the treatment of chemotherapy-induced 

thrombocytopenia (CIT).

Olpasiran

Olpasiran is an siRNA that lowers Lp(a). It is being investigated in phase 3 for the treatment of ASCVD.

Ordesekimab

Ordesekimab is a monoclonal antibody that inhibits the action of IL-15. It is being investigated for the treatment of celiac 

disease and is being developed in collaboration with Provention Bio, Inc.

Otezla

Otezla is a small molecule that inhibits PDE4. It is being investigated in phase 3 studies for the treatment of palmoplantar 

pustulosis.

Repatha

Repatha is a human monoclonal antibody that inhibits PCSK9. It is being investigated as a treatment for ASCVD in high-

risk patients with high LDL-C without prior heart attack or stroke.

Rocatinlimab

Rocatinlimab  is  a  monoclonal  antibody  that  inhibits  OX-40.  It  is  being  investigated  for  the  treatment  of  moderate-to-

severe atopic dermatitis. Rocatinlimab is being developed in collaboration with Kyowa Kirin.

Tarlatamab

Tarlatamab is a half-life extended (HLE) anti-DLL3 x anti-CD3 BiTE® molecule. It is being investigated for the treatment 

of small cell lung cancer.

In  October  2023,  we  announced  results  from  the  global  Phase  2  DeLLphi-301  study,  evaluating  tarlatamab,  an 
investigational DLL3 targeting BiTE® molecule, in patients with advanced stage SCLC who had failed two or more prior lines 
of treatment. With a median follow-up of 10.6 months, an intention-to-treat analysis that included 100 patients at the selected 
10 mg dose, tarlatamab demonstrated an ORR (primary endpoint) of 40%. For key secondary endpoints, mPFS was 4.9 months, 
and mOS was 14.3 months. There were no new safety signals observed compared to the Phase 1 study. Additionally in October 
2023, the FDA granted tarlatamab Breakthrough Therapy Designation for the treatment of adult patients with extensive-stage 
SCLC with disease progression on or after platinum-based chemotherapy.

In December 2023, we announced the FDA accepted and granted Priority Review for the Company’s BLA for tarlatamab, 

with a PDUFA date of June 12, 2024.

TEPEZZA

TEPEZZA  is  a  monoclonal  antibody  against  IGF-1R.  It  is  being  investigated  in  phase  3  studies  for  patients  with 
moderate-to-severe  active  TED  and  chronic/low  clinical  activity  score  (CAS)  TED.  It  is  also  being  investigated  for 
subcutaneous administration.

TEZSPIRE

TEZSPIRE is a human monoclonal antibody that inhibits the action of thymic stromal lymphopoietin. It is being evaluated 
in phase 3 studies as a treatment for severe asthma, chronic rhinosinusitis with nasal polyps and eosinophilic esophagitis. It is 
also  being  investigated  in  phase  2  studies  as  a  treatment  for  chronic  obstructive  pulmonary  disease  and  chronic  spontaneous 
urticaria. TEZSPIRE is being developed jointly in collaboration with AstraZeneca.

21

UPLIZNA

UPLIZNA is a humanized, affinity-optimized, afucosylated IgG1 kappa (IgG1κ) monoclonal antibody that binds to the B 
cell-specific surface antigen CD19. It is being investigated for the treatment of flare in patients with IgG4-related disease and 
myasthenia gravis.

Wezlana

Wezlana,  a  biosimilar  candidate  to  STELARA,  is  a  monoclonal  antibody  that  inhibits  IL-12  and  IL-23.  It  is  being 
investigated in a phase 3 study for biosimilarity to STELARA. The reference-product primary conditions are psoriasis, psoriatic 
arthritis and Crohn’s disease.

ABP 206

ABP  206,  a  biosimilar  candidate  to  OPDIVO,  is  a  monoclonal  antibody  that  binds  to  the  receptor  protein  called 

programmed death protein 1 (PD-1).

ABP 938

ABP 938, a biosimilar candidate to EYLEA, is a vascular endothelial growth factor receptor (VEGFR) Fc fusion protein. 
It is being investigated in a phase 3 study for biosimilarity to EYLEA. The reference-product primary conditions are wet age-
related  macular  degeneration  (AMD),  macular  edema  following  retinal  vein  occlusion,  diabetic  macular  edema  and  diabetic 
retinopathy.

ABP 959

ABP 959, a biosimilar candidate to SOLIRIS, is a monoclonal antibody that specifically binds to the complement protein 
C5.  It  is  being  investigated  in  a  phase  3  study  for  biosimilarity  to  SOLIRIS.  The  reference-product  primary  conditions  are 
paroxysmal nocturnal hemoglobinuria (PNH) and atypical hemolytic uremic syndrome (aHUS).

Business Relationships

From time to time, we enter into business relationships, including joint ventures and collaborative arrangements, for the 
R&D, manufacture and/or commercialization of products and/or product candidates. In addition, we acquire product and R&D 
technology rights and establish R&D collaborations with third parties to enhance our strategic position within our industry by 
strengthening  and  diversifying  our  R&D  capabilities,  product  pipeline  and  marketed-product  base.  These  arrangements 
generally provide for nonrefundable upfront license fees, development and commercial-performance milestone payments, cost 
sharing, royalties and/or profit sharing. The activities under these collaboration agreements are performed with no guarantee of 
either technological or commercial success, and each is unique in nature.

Trade secret protection for our unpatented confidential and proprietary information is important to us. To protect our trade 
secrets,  we  generally  require  counterparties  to  execute  confidentiality  agreements  upon  commencement  of  a  business 
relationship with us. However, others could either develop independently the same or similar information or unlawfully obtain 
access to our information.

BeiGene, Ltd.

In January 2020, we acquired an equity stake in BeiGene for approximately $2.8 billion in cash as part of a collaboration 
to expand our oncology presence in China. For additional information regarding our equity investment in BeiGene, see Part IV
—Note 10, Investments, to the Consolidated Financial Statements. Under the collaboration, BeiGene began selling XGEVA in 
2020, BLINCYTO in 2021 and KYPROLIS in 2022 in China, and Amgen shares profits and losses equally during the initial 
product-specific commercialization periods; thereafter, product rights may revert to Amgen, and Amgen will pay royalties to 
BeiGene on sales in China of such products for a specified period. Amgen manufactures and supplies the collaboration products 
to BeiGene.

In addition, we jointly develop a portion of our oncology portfolio with BeiGene, which shares in global R&D costs by 
providing  cash  and  development  services  of  up  to  $1.25  billion.  Upon  regulatory  approval,  BeiGene  will  assume 
commercialization  rights  in  China  for  a  specified  period,  and  Amgen  and  BeiGene  will  share  profits  equally  until  certain  of 
these product rights revert to Amgen. Upon return of the product rights, Amgen will pay royalties to BeiGene on sales in China 
for a specified period. For product sales outside China, Amgen will also pay royalties to BeiGene.

22

AstraZeneca plc

We  are  in  a  collaboration  with  AstraZeneca  for  the  development  and  commercialization  of  TEZSPIRE.  Under  our 
collaboration, both companies share global costs, profits and losses equally after payment by AstraZeneca of a mid-single-digit 
royalty to Amgen. AstraZeneca leads global development, and both Amgen and AstraZeneca jointly commercialize TEZSPIRE 
in North America. In North America, Amgen, as the principal, recognizes product sales of TEZSPIRE in the United States, and 
AstraZeneca,  as  the  principal,  recognizes  product  sales  of  TEZSPIRE  in  Canada.  AstraZeneca  leads  commercialization  for 
TEZSPIRE outside North America. Amgen manufactures and supplies TEZSPIRE worldwide.

UCB

We are in a collaboration with UCB for the development and commercialization of EVENITY. Under our collaboration, 
UCB  has  rights  to  lead  commercialization  for  EVENITY  in  most  countries  in  Europe.  Amgen,  as  the  principal,  leads 
commercialization  for  EVENITY  and  recognizes  product  sales  in  all  other  territories,  including  the  United  States.  Global 
development  costs  and  commercialization  profits  and  losses  related  to  the  collaboration  are  shared  equally.  Amgen 
manufactures and supplies EVENITY worldwide.

For  financial  information  about  our  significant  collaborative  arrangements,  see  Part  IV—Note  9,  Collaborations,  to  the 

Consolidated Financial Statements.

23

Human Capital Resources

Overview

Amgen’s  approach  to  human  capital  resource  management  starts  with  our  mission  to  serve  patients.  We  strive  to  serve 
patients by transforming the promise of science and biotechnology into therapies that have the power to restore health or save 
lives. The way we approach our business is guided by the Amgen Values:

Amgen Values

Be Science-Based

Compete Intensely and Win

Create Value for Patients, 
Staff and Stockholders

Be Ethical

Trust and Respect Each Other

Ensure Quality

Work in Teams

Collaborate, Communicate 
and Be Accountable

Our staff are also guided by, and receive annual training on, the Company’s Code of Conduct, which is designed to help 
every person who does business on our behalf worldwide (including all staff, management, consultants, contract workers and 
temporary workers) to understand what is expected of them.

Our  industry  is  subject  to  a  complex  regulatory  and  reimbursement  environment.  The  unique  demands  of  our  industry, 
together  with  the  challenges  of  running  an  enterprise  focused  on  the  discovery,  development,  manufacture  and 
commercialization of innovative medicines, requires a highly engaged and committed workforce.

As  of  December  31,  2023,  Amgen  had  approximately  26,700  staff  members  in  over  50  countries,  and  we  have  had 
relatively  low  global  turnover  rates  compared  to  available  industry  information.  We  also  supplement  our  workforce  with 
independent  contractors,  contingent  workers  and  temporary  workers,  as  needed.  Outside  of  the  United  States,  some  of  our 
employees  are  represented  by  unions  or  works  councils.  We  consider  our  staff  relations  to  be  good,  supported  by  regular 
assessments of staff engagement surveys on a wide range of topics (including flexible work environments, career development, 
and  maintaining  a  culture  of  compliance).  We  discuss  the  results  of  these  surveys  with  our  workforce  and  our  Board  of 
Directors. Reflecting our staff members’ desire to retain a flexible approach to work, we offer a flexible workspace initiative 
that enables many employees to work together with their manager to determine the location that best enables their work at hand, 
supporting virtual work as well as working in person.

Compensation, Benefits and Development

Our  approach  to  employee  compensation  and  benefits  is  designed  to  deliver  cash,  equity  and  benefit  programs  that  are 
competitive  with  those  offered  by  leading  companies  in  the  biotechnology  and  pharmaceutical  industries,  and  to  attract, 
motivate  and  retain  talent  with  a  focus  on  encouraging  performance,  promoting  accountability  and  adherence  to  the  Amgen 
Values and alignment with the interests of the Company’s stockholders.

Our  base  pay  program  aims  to  compensate  staff  members  relative  to  the  value  of  the  contributions  of  their  role,  which 
takes into account the skills, knowledge and abilities required to perform each position, as well as the experience brought to the 
job. We also provide annual incentive programs to reward our staff in alignment with achievement of Company-wide goals that 
are established annually and designed to drive aspects of our strategic priorities that support and advance our strategy across our 
Company and are intended to positively position us for both near- and long-term success. The majority of our staff members are 
also eligible for equity award grants under our long-term incentive program that are designed to align the interests of our staff 
members with those of our stockholders. For senior level staff, a significant proportion of equity award value is dependent on 
Company performance.

All  staff  participate  in  a  regular  performance  measurement  process  through  which  staff  receive  performance  and 
development feedback, and pay is aligned to performance. The Amgen Values and Leadership Attributes (Inspire, Accelerate, 
Integrate and Adapt) are an integral part of the performance assessments of our staff members, and these evaluations serve as an 
important information tool and basis for compensation decisions.

To support the development of our staff, we provide a variety of programs, including leadership development programs, 
classroom-based  and  virtual  instructor-led  courses,  and  self-paced  learning  options  as  well  as  mentoring,  networking  and 
coaching opportunities.

24

Our  benefit  programs  are  generally  broad-based,  promote  health  and  overall  well-being  and  emphasize  saving  for 
retirement. All regular U.S. staff members are eligible to participate in the same core health and welfare and retirement savings 
plans. Other U.S. employee benefits include adoption assistance, paid parental leave programs, access to childcare, employee 
assistance programs, employee stock purchase plan, flexible spending accounts, life, long-term care and business travel accident 
insurance,  short  and  long-term  disability  benefits,  wellness  benefits  and  work-life  resources  and  referrals.  Comparable 
programs  and  benefits  are  available  globally,  with  the  same  health  and  well-being  intent,  and  consistent  with  local  statutory 
requirements.

Our Compensation and Management Development Committee provides oversight of our compensation plans, policies and 

programs.

Safety and Wellness

Creating a safe and healthy workplace for our staff is an important priority at Amgen. Our goal is to have a world class 
safety record through safety leadership, risk management practices and integrating safety throughout our business processes. To 
foster  our  safety  culture,  we  implement  a  comprehensive  safety  program  and  reinforce  desired  safety  behaviors,  driving  to 
understand  and  mitigate  the  root  cause  of  safety  incidents  and  manage  and  control  variability.  We  use  leading  indicators  to 
assess  the  effectiveness  of  our  safety  programs  and  make  course  corrections  as  needed.  Additionally,  we  perform  formal 
executive management review of functional safety performance for Operations, Global Commercial Operations and R&D on a 
quarterly basis with a focus on identifying early signals and taking action to drive continuous improvement. 

Our CRCC provides general oversight of our safety programs and initiatives.

Culture

We believe that a diverse and inclusive culture fosters innovation, which supports our ability to serve patients. Further, we 
also believe our global presence is strengthened by having a workforce that reflects the diversity of the patients we serve(1). Our 
Diversity, Inclusion and Belonging Council is led by our executive leadership and is responsible for overseeing our strategy to 
further a diverse and inclusive workplace. We offer a variety of diversity, inclusion and belonging programs and have continued 
to  launch  enhanced  resources  that  guide  staff  on  the  role  they  play  in  creating  an  inclusive  culture.  Further,  we  continue  to 
incorporate  diversity,  inclusion  and  belonging  considerations  into  our  business  operations,  including  clinical  trial  design  and 
procurement, to broaden access to patients and suppliers to the benefit of our business.

Each  of  Amgen’s  Employee  Resource  Groups  is  sponsored  by  senior  executive  leadership.  Our  Employee  Resource 
Groups promote leadership, development and belonging for members while also working to positively impact our business by 
leading business initiatives and providing diverse perspectives and experience. 

(1)     Amgen is an equal opportunity employer and does not make employment decisions based on race, gender, ethnicity, or any other protected characteristic.

25

Global Employee Resource Groups

Amgen Asian Association (AAA)

Amgen Black Employee Network (ABEN)

Ability Bettered through Leadership and Education (ABLE), a resource group for those with disabilities, visible and invisible, including 
those conditions also experienced by the patients that Amgen serves

Amgen Early Career Professionals (AECP)

Amgen International Network (AIN)

Amgen Latin Employee Network (ALEN)

Amgen PRIDE – LGBTQ and Allies Network (PRIDE)

Amgen South Asian Network (ASAN)

Amgen Veterans Employees Network (AVEN)

Recognition of Indigenous Peoples, Values and Environmental Resources (RIVER)

Women Empowered to be Exceptional (WE2)

Women in STEM Enrichment (WISE)

Building on the successful execution of our 2022 ESG goal under our annual incentive plan, our enhanced ESG goal for 
2023  was  designed  to  advance  our  progress  on  key  ESG  initiatives,  including  by  driving  measurable  achievement  of  our 
Representation in Clinical Research (RISE) objectives that seek to improve the diversity and representation of racial and ethnic 
minority populations in our clinical trial research to help us develop medicines that are studied in participants who better reflect 
the  populations  affected  by  serious  illness,  and  further  expanding  the  number  of  leaders  accountable  for  establishing, 
documenting and executing on diversity, inclusion and belonging action plans.

As  of  December  31,  2023,  women  comprised  approximately  53%  of  our  global  workforce,  and  ethnic  minorities 
accounted  for  approximately  50%  of  our  U.S.  and  Puerto  Rico-based  workforce.  In  our  effort  to  attract  and  retain  the  best 
talent,  we  seek  out  and  support  talent  across  the  globe,  including  in  underrepresented  populations,  consistent  with  our 
commitment to equal opportunity. In 2023, we launched our Apprenticeship Program as part of our multidimensional inclusive 
hiring  and  talent  development  strategy,  with  the  first  phase  of  the  program  beginning  with  our  Manufacturing  and  DTI 
functions. Our Apprenticeship Program is a skills-based approach that proactively seeks to hire candidates from nontraditional 
sources and backgrounds, and is designed to invest in our future workforce through attracting, hiring and upskilling non-four-
year  degreed  talent  in  the  United  States.  Through  the  Apprenticeship  Program,  we  will  provide  individuals  with  classroom-
based and on-the-job training as well as mentorship opportunities needed to develop proficiency in targeted business areas and 
roles. We believe that our Apprenticeship Program and other skills-based approaches to hiring will provide us with access to a 
larger pool of highly motivated and productive talent while also providing underrepresented groups greater access to innovation 
economy careers.

Our  2022  Consolidated  EEO-1  Report  can  be  viewed  on  our  website  at  www.amgen.com  (the  website  address  is  not 

intended to function as a hyperlink, and the information contained in our website is not intended to be a part of this filing).

Our Compensation and Management Development Committee oversees our labor and employment policies, programs and 

initiatives, including those relating to diversity, inclusion and belonging.

26

Information about Our Executive Officers

The executive officers of the Company as of February 14, 2024, are set forth below. 

Mr.  Robert  A.  Bradway,  age  61,  has  served  as  a  director  of  the  Company  since  2011  and  Chairman  of  the  Board  of 
Directors  since  2013.  Mr.  Bradway  has  been  the  Company’s  President  since  2010  and  Chief  Executive  Officer  since  2012. 
From  2010  to  2012,  Mr.  Bradway  served  as  the  Company’s  President  and  Chief  Operating  Officer.  Mr.  Bradway  joined  the 
Company in 2006 as Vice President, Operations Strategy, and served as Executive Vice President and Chief Financial Officer 
from 2007 to 2010. Prior to joining the Company, Mr. Bradway was a Managing Director at Morgan Stanley in London, where, 
beginning  in  2001,  he  had  responsibility  for  the  firm’s  banking  department  and  corporate  finance  activities  in  Europe.  Mr. 
Bradway  has  been  a  director  of  The  Boeing  Company,  an  aerospace  company  and  manufacturer  of  commercial  airplanes, 
defense,  space  and  securities  systems,  since  2016.  He  has  served  on  the  board  of  trustees  of  the  University  of  Southern 
California  since  2014.  From  2011  to  2017,  Mr.  Bradway  was  a  director  of  Norfolk  Southern  Corporation,  a  transportation 
company.

Dr. James E. Bradner, age 51, became Executive Vice President, Research and Development, and Chief Scientific Officer, 
in December 2023. Prior to joining the Company, from 2022 to 2023, Dr. Bradner was a clinician at the Dana-Farber Cancer 
Institute. From 2016 to 2022, Dr. Bradner served as President of the Novartis Institutes for BioMedical Research, where he was 
a  member  of  the  Executive  Committee  of  Novartis  AG.  Dr.  Bradner  previously  served  on  the  faculty  at  Harvard  Medical 
School.

Mr. Murdo Gordon, age 57, became Executive Vice President, Global Commercial Operations, in 2018. Prior to joining 
the Company, Mr. Gordon was Chief Commercial Officer at BMS, a pharmaceutical company, from 2016 to 2018. Mr. Gordon 
served as Head of Worldwide Markets at BMS from 2015 to 2016. Prior to this, Mr. Gordon served in a variety of leadership 
roles at BMS for more than 25 years.

Mr. Jonathan P. Graham, age 63, became Executive Vice President, General Counsel and Secretary in 2019. Mr. Graham 
joined the Company in 2015. From 2015 to 2019, Mr. Graham was Senior Vice President, General Counsel and Secretary. Prior 
to joining Amgen, from 2006 to 2015, Mr. Graham was Senior Vice President and General Counsel at Danaher Corporation. 
From 2004 to 2006, Mr. Graham was Vice President, Litigation and Legal Policy, at General Electric Company (GE). Prior to 
GE, Mr. Graham was a partner at Williams & Connolly LLP.

Mr. Peter H. Griffith, age 65, became Executive Vice President and Chief Financial Officer in 2020. Mr. Griffith joined 
the Company in 2019 as Executive Vice President, Finance. Prior to joining Amgen, Mr. Griffith was President of Sherwood 
Canyon  Group,  LLC,  a  private  equity  firm.  From  1997  to  2019,  Mr.  Griffith  was  a  partner  at  EY,  an  accounting  and 
professional  services  firm,  and  served  in  a  variety  of  senior  leadership  roles,  with  his  last  position  being  Global  Vice  Chair, 
Corporate  Development.  Prior  to  EY,  Mr.  Griffith  was  a  Managing  Director  and  head  of  the  investment  banking  division  of 
Wedbush Securities Inc.

Ms. Nancy A. Grygiel, age 56, became Senior Vice President and Chief Compliance Officer in 2020. Ms. Grygiel joined 
the Company in 2015. From 2016 to 2020, Ms. Grygiel was Vice President, Compliance. Prior to joining Amgen, from 2011 to 
2015,  Ms.  Grygiel  served  as  Vice  President,  Compliance,  Corporate  &  International,  at  Allergan,  Inc.  (Allergan).  Prior  to 
Allergan, Ms. Grygiel held several management positions at Mylan Pharmaceuticals, Inc.

Ms.  Rachna  Khosla,  age  51,  became  Senior  Vice  President,  Business  Development,  in  2021.  Ms.  Khosla  joined  the 
Company  in  2013  as  Corporate  Development  Director.  From  2018  to  2021,  Ms.  Khosla  was  Vice  President,  Business 
Development,  and  from  2016  to  2018,  was  Executive  Director,  Business  Development.  Prior  to  joining  the  Company,  Ms. 
Khosla was a Director at Lazard Ltd. (Lazard) responsible for healthcare mergers and acquisitions. Prior to Lazard, Ms. Khosla 
held various roles in investment banking (mergers and acquisitions) and corporate venture capital at Credit Suisse Group AG, 
Sanofi Aventis, Aventis Capital, J.P. Morgan Chase & Co., and Salomon Brothers, Inc.

Mr. Derek Miller, age 51, became Senior Vice President, Human Resources, in 2022. Mr. Miller joined the Company in 
2003 and has held human resources leadership roles supporting each of the Company’s major business functions. From 2020 to 
2022, Mr. Miller was Vice President, Global Total Rewards, and from 2018 to 2020, was Vice President, Human Resources. 
From  2015  to  2018,  Mr.  Miller  was  an  Executive  Director,  Human  Resources.  Prior  to  2015,  Mr.  Miller  served  as  a  Senior 
Manager  in  the  Human  Resources  organization,  before  his  promotion  to  Director,  Human  Resources,  and  then  to  Strategy 
Director.

27

Dr. David M. Reese, age 61, became the Company’s inaugural Executive Vice President and Chief Technology Officer, in 
December  2023,  responsible  for  accelerating  the  use  of  technology  and  artificial  intelligence  across  the  organization.  From 
2018  to  December  2023,  Dr.  Reese  served  as  Executive  Vice  President,  Research  and  Development.  Dr.  Reese  joined  the 
Company  in  2005  and  has  held  leadership  roles  in  development,  translational  and  medical  sciences,  and  discovery  research, 
including  as  Senior  Vice  President,  Translational  Sciences  and  Oncology,  from  2017  to  2018.  Prior  to  joining  Amgen,  Dr. 
Reese was a cofounder, president, and chief medical officer of Translational Oncology Research International, a not-for-profit 
academic clinical research organization, and director of Clinical Research at the Breast Cancer International Research Group. 
Dr. Reese previously served on the faculty at UCLA and the University of California, San Francisco.

Mr. Esteban Santos, age 56, became Executive Vice President, Operations, in 2016. Mr. Santos joined the Company in 
2007  as  Executive  Director,  Manufacturing  Technologies.  From  2013  to  2016,  Mr.  Santos  was  Senior  Vice  President, 
Manufacturing.  From  2008  to  2013,  Mr.  Santos  held  a  number  of  Vice  President  roles  at  the  Company  in  engineering, 
manufacturing, site operations and drug product. Prior to joining the Company, Mr. Santos served as Site General Manager of 
J&J’s  Cordis  operation  in  Puerto  Rico.  Prior  to  J&J,  Mr.  Santos  held  several  management  positions  in  GE’s  industrial  and 
transportation businesses.

Geographic Area Financial Information

For financial information concerning the geographic areas in which we operate, see Part IV—Note 4, Revenues, and Note 

12, Property, plant and equipment, to the Consolidated Financial Statements.

Investor Information

Financial  and  other  information  about  us  is  available  on  our  website  at  www.amgen.com.  We  make  available  on  our 
website, free of charge, copies of our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, current reports on Form 
8-K  and  amendments  to  those  reports  filed  or  furnished  pursuant  to  Section  13(a)  or  15(d)  of  the  Exchange  Act  as  soon  as 
reasonably  practicable  after  we  electronically  file  such  material  with  or  furnish  it  to  the  U.S.  Securities  and  Exchange 
Commission  (SEC).  In  addition,  we  have  previously  filed  registration  statements  and  other  documents  with  the  SEC.  Any 
document  we  file  may  be  inspected  without  charge  at  the  SEC’s  website  at  www.sec.gov.  (These  website  addresses  are  not 
intended to function as hyperlinks, and the information contained in our website and in the SEC’s website is not intended to be 
a part of this filing.)

28

Item 1A. RISK FACTORS

This  report  and  other  documents  we  file  with  the  SEC  contain  forward-looking  statements  that  are  based  on  current 
expectations,  estimates,  forecasts  and  projections  about  us,  our  future  performance,  our  business,  our  beliefs  and  our 
management’s assumptions. These statements are not guarantees of future performance and involve certain risks, uncertainties 
and assumptions that are difficult to predict. You should carefully consider the risks and uncertainties our business faces. The 
risks described below are not the only ones we face. Our business is also subject to the risks that affect many other companies, 
such as employment relations, general economic conditions, geopolitical events and international operations. Further, additional 
risks not currently known to us or that we currently believe are immaterial may in the future materially and adversely affect our 
business, operations, liquidity and stock price. 

SUMMARY

Risks Related to Government Regulations and Third-Party Policies

• Our sales depend on coverage and reimbursement from government and commercial third-party payers, and pricing and 

reimbursement pressures have affected, and are likely to continue to affect, our profitability.

• Guidelines and recommendations published by various organizations can reduce the use of our products.

• We could be subject to additional tax liabilities, including from an adverse outcome in our ongoing tax dispute with the 
IRS  and  other  tax  examinations,  enactment  of  the  OECD  minimum  corporate  tax  rate  agreement  and  the  adoption  and 
interpretation of new tax legislation, and we anticipate additional tax liabilities from certain provisions of the 2017 Tax 
Act that will go into effect in 2026; such tax liabilities could adversely affect our profitability and results of operations.

• Our business may be affected by litigation and government investigations.

Risks Related to Economic Conditions and Operating a Global Business

• Our  efforts  to  collaborate  with  or  acquire  other  companies,  products,  or  technology,  and  to  integrate  the  operations  of 
companies  or  to  support  the  products  or  technology  we  have  acquired,  may  not  be  successful,  and  may  result  in 
unanticipated costs, delays or failures to realize the benefits of the transactions. 

• We may not be able to access the capital and credit markets on terms that are favorable to us, or at all.

• A  breakdown  of  our  information  technology  systems,  cyberattack  or  information  security  breach  could  significantly 
compromise  the  confidentiality,  integrity  and  availability  of  our  information  technology  systems,  network-connected 
control systems and/or our data, interrupt the operation of our business and/or affect our reputation.

• Our sales and operations are subject to the risks of doing business internationally, including in emerging markets.

Risks Related to Competition

• Our products face substantial competition and our product candidates are also likely to face substantial competition.

• Our intellectual property positions may be challenged, invalidated or circumvented, or we may fail to prevail in current 

and future intellectual property litigation. 

• We currently face competition from biosimilars and generics and expect to face increasing competition from biosimilars 

and generics in the future.

• Concentration of sales at certain of our wholesaler distributors, and consolidation of private payers, such as insurers, and 

PBMs has negatively affected, and may continue to negatively affect, our business.

Risks Related to Research and Development

• We may not be able to develop commercial products despite significant investments in R&D.

• We  must  conduct  clinical  trials  in  humans  before  we  commercialize  and  sell  any  of  our  product  candidates  or  existing 

products for new indications.

• Our current products and products in development cannot be sold without regulatory approval.

• Some  of  our  products  are  used  with  drug  delivery  or  companion  diagnostic  devices  that  have  their  own  regulatory, 

manufacturing and other risks.

29

• Some of our pharmaceutical pipeline and our commercial product sales rely on collaborations with third parties, which 

may adversely affect the development and sales of our products.

Risks Related to Operations

• We perform a substantial majority of our commercial manufacturing activities at our facility in the U.S. territory of Puerto 
Rico  and  a  substantial  majority  of  our  clinical  manufacturing  activities  at  our  facility  in  Thousand  Oaks,  California; 
significant disruptions or production failures at these facilities could significantly impair our ability to supply our products 
or continue our clinical trials.

• We rely on third-party suppliers for certain of our raw materials, medical devices and components.

• Manufacturing difficulties, disruptions or delays could limit supply of our products and limit our product sales.

• Our  business  and  operations  may  be  negatively  affected  by  the  failure,  or  perceived  failure,  of  achieving  our 

environmental, social and governance objectives.

• The effects of global climate change and related natural disasters could negatively affect our business and operations.

General Risk Factors

• Global economic conditions may negatively affect us and may magnify certain risks that affect our business.

• Our stock price is volatile.

RISKS RELATED TO GOVERNMENT REGULATIONS AND THIRD-PARTY POLICIES

Our sales depend on coverage and reimbursement from government and commercial third-party payers, and pricing and 

reimbursement pressures have affected, and are likely to continue to affect, our profitability.

Sales  of  our  products  depend  on  the  availability  and  extent  of  coverage  and  reimbursement  from  third-party  payers, 
including  government  healthcare  programs  and  private  insurance  plans.  Governments  and  private  payers  continue  to  pursue 
initiatives to manage drug utilization and contain costs. Further, pressures on healthcare budgets from the economic downturn 
and inflation continue and are likely to increase across the markets we serve. Payers are increasingly focused on costs, which 
have resulted, and are expected to continue to result, in lower reimbursement rates for our products or narrower populations for 
which payers will reimburse. Continued intense public scrutiny of the price of drugs and other healthcare costs, together with 
payer dynamics, have limited, and are likely to continue to limit, our ability to set or adjust the price of our products based on 
their value, which can have a material adverse effect on our business. In the United States, particularly over the past few years, 
a number of legislative and regulatory proposals have been introduced and/or signed into law that attempt to lower drug prices. 
These  include  the  IRA  legislation  that  enables  the  U.S.  government  to  set  prices  for  certain  drugs  in  Medicare,  redesigns 
Medicare Part D benefits to shift a greater portion of the costs to manufacturers and enables the U.S. government to impose 
penalties if drug prices are increased at a rate faster than inflation. Additional proposals focused on drug pricing continue to be 
debated, and additional executive orders focused on drug pricing and competition are likely to be adopted and implemented in 
some form. Government actions or ballot initiatives at the state level also represent a highly active area of policymaking and 
experimentation,  including  pursuit  of  proposals  that  limit  drug  reimbursement  under  state  run  Medicaid  programs  based  on 
reference  prices  or  permitting  importation  of  drugs  from  Canada.  Such  state  policies  may  also  eventually  be  adopted  at  the 
federal level.

We are unable to predict which or how many policy, regulatory, administrative or legislative changes may ultimately be, 
or effectively estimate the consequences to our business if, enacted and implemented. However, to the extent that payer actions 
further decrease or modify the coverage or reimbursement available for our products, require that we pay increased rebates or 
shift other costs to us, limit or affect our decisions regarding the pricing of or otherwise reduce the use of our products, such 
actions could have a material adverse effect on our business and results of operations.

—Changing U.S. federal coverage and reimbursement policies and practices have affected and are likely to continue to 

affect access to, pricing of and sales of our products

A  substantial  portion  of  our  U.S.  business  relies  on  reimbursement  from  federal  government  healthcare  programs  and 
commercial  insurance  plans  regulated  by  federal  and  state  governments.  See  Part  I,  Item  1.  Business—Reimbursement.  Our 
business  has  been  and  will  continue  to  be  affected  by  legislative  actions  changing  U.S.  federal  reimbursement  policy.  For 
example, in 2022, the IRA was enacted and includes provisions requiring that beginning in 2026, mandatory price setting be 
introduced in Medicare for certain drugs paid for under Parts B and D, whereby manufacturers must accept a price established 
by the government or face penalties on all U.S. sales (starting with ten drugs in 2026, adding 15 in 2027 and 2028, and adding 
20 in 2029 and subsequent years such that by 2031 approximately 100 drugs could be subject to such set prices). The Medicare 

30

price  setting  process  began  on  August  29,  2023  when  CMS  announced  the  first  ten  drugs  for  Medicare  price  setting,  which 
includes ENBREL. Our wholly owned subsidiary, Immunex Corporation, which holds the rights to the ENBREL BLA, entered 
into an agreement with the U.S. government to participate in the price setting process and submitted the required data to CMS 
for ENBREL, including certain price, cost and patent data. The Medicare price setting process will conclude by August 1, 2024, 
and  by  September  1,  2024,  CMS  will  publish  prices  that  will  be  applicable  to  these  ten  drugs  in  the  Medicare  program 
beginning January 1, 2026. Also under the IRA, starting on January 1, 2024, Medicare Part D was redesigned to cap beneficiary 
out-of-pocket costs and, beginning January 1, 2025, Federal reinsurance will be reduced in the catastrophic phase (resulting in a 
shift and increase of such costs to Part D plans and manufacturers, including by requiring manufacturer discounts on certain 
drugs).  Further,  the  IRA  created  a  mechanism  for  CMS  to  collect  rebates  from  manufacturers  if  price  increases  outpace 
inflation. Rebate obligations began to accrue October 1, 2022 for Medicare Part D and January 1, 2023 for Medicare Part B, but 
CMS has not yet issued invoices and has some discretion as to when it must bill manufacturers. We expect that several of our 
products will be subject to these inflation rebates, and several of our products have been on lists that are issued and updated on 
a quarterly basis by CMS under a related program under which Medicare beneficiaries are charged reduced coinsurance if price 
increases exceed inflation. The IRA’s drug pricing controls and Medicare redesign are likely to have a material adverse effect 
on our sales, our business and our results of operations, and such impact is expected to increase through the end of the decade 
and  will  depend  on  factors  including  the  extent  of  our  portfolio’s  exposure  to  Medicare  reimbursement,  the  rate  of  inflation 
over  time,  the  number  of  our  products  selected  for  mandatory  price  setting  and  the  timing  of  market  entry  of  generic  or 
biosimilar  competition.  Further,  following  the  passage  of  the  IRA,  the  environment  remains  dynamic  and  U.S.  policymakers 
continue to demonstrate interest in health care and drug pricing changes. For example, CMS issued a proposed Medicaid Drug 
Rebate Program rule that, if finalized, would require manufacturers to aggregate or “stack” all rebates, discounts, or other price 
concessions made to separate, unrelated entities across the pharmaceutical supply chain on a given unit of product to determine 
the “Best Price,” a metric that is used to determine Medicaid rebates and 340B statutory rates. In early 2023, the HHS selected 
new  healthcare  payment  and  delivery  models  for  testing,  in  response  to  an  October  2022  Executive  Order  on  Lowering 
Prescription  Drug  Costs  for  Americans,  including  the  Accelerating  Clinical  Evidence  Model,  which  could  introduce  new 
payment methods that reduce reimbursement for drugs approved under accelerated approval. That Executive Order followed a 
2021 Executive Order designed to increase competition in the healthcare sector, including by calling for the FDA to develop 
prescription  drug  importation  programs  and  the  FTC  to  apply  greater  scrutiny  of  anticompetitive  activity  and  responses  to 
which include actions from the HHS (which released a report with drug pricing proposals that seek to promote competition) and 
from the USPTO (which has taken steps to strengthen coordination with the FDA to address impediments to generic drug and 
biosimilar competition). Other CMS policy changes and demonstration projects to test new care, delivery and payment models 
can also significantly affect how drugs, including our products, are covered and reimbursed. In the fourth quarter of 2021, HHS 
released a plan to address drug pricing that included potential future mandatory models that link payment for prescription drugs 
and biologics to certain factors, including the overall cost of care. In March 2023, the Administration released its budget plan 
for fiscal year 2024 that included proposals to expand the number of drugs subject to mandatory Medicare price setting under 
the IRA, imposing such price setting activity earlier, and extending to commercial health insurance the requirement that drug 
manufacturers  pay  rebates  if  price  increases  outpace  inflation.  While  those  proposed  expansions  of  the  IRA’s  drug  pricing 
controls have not been enacted, the proposals demonstrate that this area continues to be a focus of the Administration.

We also face risks related to the reporting of pricing data that affects reimbursement of and discounts provided for our 
products. U.S. government price reporting regulations are complex and may require biopharmaceutical manufacturers to update 
certain previously submitted data. If our submitted pricing data are incorrect, we may become subject to substantial fines and 
penalties or other government enforcement actions, which could have a material adverse effect on our business and results of 
operations. In addition, as a result of restating previously reported price data, we may be required to pay additional rebates and 
provide additional discounts.

—Changing reimbursement and pricing actions in various states have negatively affected and may continue to negatively 

affect access to and have affected and may continue to affect sales of our products

At the state level, government actions or ballot initiatives can also affect how our products are covered and reimbursed 
and/or create additional pressure on our pricing decisions. Existing and proposed state pricing laws have added complexity to 
the pricing of drugs and may already be affecting industry pricing decisions. A number of states have adopted, and many other 
states  are  considering,  drug  importation  programs  and  other  pricing  actions,  including  proposals  designed  to  require 
biopharmaceutical manufacturers to report to the state proprietary pricing information or provide advance notice of certain price 
increases.

States are also enacting laws referencing the IRA and seeking to regulate the 340B Drug Pricing Program. For example, 
following the passage of the IRA, bills have been proposed in multiple states that would apply the drug price caps set by HHS 
for Medicare to drug prices in an individual state. For Medicaid patients, states have established a Medicaid drug spending cap 
(New  York)  and  implemented  a  new  review  and  supplemental  rebate  negotiation  process  (Massachusetts).  Seven  states 
(Colorado, Maine, New Hampshire, Maryland, Minnesota, Oregon and Washington) have enacted laws that establish PDABs to 

31

identify drugs that pose affordability challenges, and four such states include authority for the state PDAB to set upper payment 
limits on certain drugs for in-state patients, payers and providers. So far in 2024, no fewer than 11 states have pending PDAB 
legislation. States with enacted PDAB laws are in various phases of implementation, with Colorado’s PDAB being the furthest 
along. In August 2023, the Colorado PDAB announced the first five drugs to undergo an affordability review, one of which is 
ENBREL. If the PDAB process determines that ENBREL is unaffordable, ENBREL could be subject to an upper payment limit 
as  early  as  Q4  2024.  Louisiana  and  Arkansas  have  enacted  laws  with  mandates  on  manufacturers  participating  in  340B,  and 
thus far in 2024, no fewer than 15 states have similar legislation pending. These bills vary, but include provisions on restricting 
a manufacturer’s ability to direct drugs in 340B channels, recognizing 340B contract pharmacies and a prohibition on requiring 
the inclusion of 340B claims modifiers. Further, in Genesis Health Care, Inc. v. Becerra, the U.S. District Court for the District 
of  South  Carolina  issued  an  order  in  November  2023  that  enjoins  the  Health  Resources  and  Services  Administration  from 
enforcing its more restrictive interpretation of what is considered a patient under the 340B program, to the potential benefit of 
healthcare systems seeking to expand the application of 340B discounts.

Additionally,  on  January  5,  2024,  the  FDA  authorized  Florida  to  move  forward  with  its  importation  program  proposal. 
Colorado, Maine, New Hampshire, New Mexico, Texas and Vermont have also enacted state importation laws, and some have 
submitted plans for approval to the FDA. Other states could adopt similar approaches or could pursue different policy changes 
in a continuing effort to reduce their costs.

Ultimately, as with U.S. federal government actions, existing or future state government actions or ballot initiatives may 

also have a material adverse effect on our product sales, business and results of operations.

—U.S. commercial payer actions have affected and may continue to affect access to and sales of our products 

Payers,  including  healthcare  insurers,  PBMs,  integrated  healthcare  delivery  systems  (vertically-integrated  organizations 
built  from  consolidations  of  healthcare  insurers  and  PBMs)  and  group  purchasing  organizations,  increasingly  seek  ways  to 
reduce their costs. With increasing frequency, payers are adopting benefit plan changes that shift a greater proportion of drug 
costs  to  patients.  Such  measures  include  more  limited  benefit  plan  designs,  high  deductible  plans,  higher  patient  co-pay  or 
coinsurance  obligations  and  more  significant  limitations  on  patients’  use  of  manufacturer  commercial  co-pay  assistance 
programs.  Further,  government  regulation  of  payers  may  affect  these  trends.  For  example,  CMS  finalized  a  policy  for  plan 
years  starting  on  or  after  January  1,  2021  that  has  caused  commercial  payers  to  more  widely  adopt  co-pay  accumulator 
adjustment programs. While the U.S. District Court for the District of Columbia struck down this policy in September 2023 and 
further clarified in December 2023 that its ruling had the effect of reinstating the co-pay accumulator adjustment policy from 
2020,  CMS  and  HHS  have  signaled  that  they  do  not  intend  to  enforce  certain  restrictions  from  the  2020  policy  that  would 
reduce the adoption of co-pay accumulator adjustment programs. Payers, including PBMs, have sought, and continue to seek, 
price discounts or rebates in connection with the placement of our products on their formularies or those they manage, and to 
also impose restrictions on access to or usage of our products (such as Step Therapy), require that patients receive the payer’s 
prior  authorization  before  covering  the  product,  and/or  chosen  to  exclude  certain  indications  for  which  our  products  are 
approved.  For  example,  some  payers  require  physicians  to  demonstrate  or  document  that  the  patients  for  whom  Repatha  has 
been  prescribed  meet  their  utilization  criteria,  and  these  requirements  have  served  to  limit  and  may  continue  to  limit  patient 
access to Repatha treatment. In an effort to reduce barriers to access, we reduced the net price of Repatha by providing greater 
discounts and rebates to payers (including PBMs that administer Medicare Part D prescription drug plans), and in response to a 
very  high  percentage  of  Medicare  patients  abandoning  their  Repatha  prescriptions  rather  than  paying  their  co-pay,  we 
introduced a set of new National Drug Codes to make Repatha available at a lower list price. However, affordability of patient 
out-of-pocket co-pay cost has limited and may continue to limit patient use. Further, despite these net and list price reductions, 
some payers have restricted, and may continue to restrict, patient access and may seek further discounts or rebates or take other 
actions, such as changing formulary coverage for Repatha, that could reduce our sales of Repatha. These factors have limited, 
and may continue to limit, patient affordability and use, negatively affecting Repatha sales.

Further, significant consolidation in the health insurance industry has resulted in a few large insurers and PBMs, which 
places  greater  pressure  on  pricing  and  usage  negotiations  with  biopharmaceutical  manufacturers,  significantly  increasing 
discount and rebate requirements and limiting patient access and usage. For example, in the United States, as of the beginning 
of 2024, the top five integrated health plans and PBMs controlled about 92% of all pharmacy prescriptions. This high degree of 
consolidation among insurers, PBMs and other payers, including integrated healthcare delivery systems and/or with specialty or 
mail-order  pharmacies  and  pharmacy  retailers,  has  increased  the  negotiating  leverage  such  entities  have  over  us  and  other 
biopharmaceutical manufacturers and has resulted in greater price discounts, rebates and service fees realized by those payers 
from  our  business.  Each  of  CVS,  Express  Scripts  and  United  Health  Group  (among  the  top  five  integrated  health  plans  and 
PBMs), have Rebate Management Organizations that further increase their leverage to negotiate deeper discounts. Ultimately, 
additional  discounts,  rebates,  fees,  coverage  changes,  plan  changes,  restrictions  or  exclusions  imposed  by  these  commercial 
payers could have a material adverse effect on our product sales, business and results of operations. Policy reforms advanced by 
Congress or the Administration that refine the role of PBMs in the U.S. marketplace could have downstream implications or 

32

consequences for our business and how we interact with these entities. For example, in June 2022, the FTC launched an inquiry 
into the business practices of PBMs and subsequently expanded the investigation to the three rebate management organizations 
owned by the three largest PBMs. In addition, multiple Congressional Committees are investigating PBM practices and have 
also  proposed  legislation  that  could  increase  transparency  and  reporting  of  these  practices  and/or  impact  rebates  and  service 
fees. The results of such inquiry could have an effect on manufacturer interactions with PBMs, resulting in changes to access 
for certain medicines. See Concentration of sales at certain of our wholesaler distributors, and consolidation of private payers, 
such as insurers, and PBMs has negatively affected, and may continue to negatively affect, our business.

Our  business  is  also  affected  by  policies  implemented  by  private  healthcare  entities  that  process  Medicare  claims, 
including Medicare Administrative Contractors. For example, in the second quarter of 2022, several Medicare Administrative 
Contractors  issued  notice  that  TEZSPIRE  would  be  added  to  their  “self-administered  drug”  exclusion  lists.  Although  the 
Medicare  Administrative  Contractors  subsequently  removed  TEZSPIRE  from  their  exclusion  lists,  these  exclusions,  if 
reintroduced  and/or  implemented,  would  result  in  Medicare  beneficiaries  with  severe  asthma  losing  access  to  TEZSPIRE 
coverage under Medicare Part B and potentially also under Medicare Advantage.

—Government and commercial payer actions outside the United States have affected and will continue to affect access to 

and sales of our products

Outside the United States, we expect countries will also continue to take actions to reduce their drug expenditures and to 
reduce intellectual property protections. See Part I, Item 1. Business—Reimbursement. Pressures to decrease drug expenditures 
may  intensify  as  governments  take  actions  to  address  budgets  strained  by  high  inflation,  expenditures  to  respond  to  the 
COVID-19  pandemic  and  weak  economic  conditions,  including  in  Europe  where  the  effects  of  the  Russia–Ukraine  conflict 
have  challenged  the  economies  in  that  region.  Further,  the  EU  is  currently  undergoing  a  review  and  possible  revision  of  its 
pharmaceutical legislation that, while full implementation is not expected before 2027, could lead to proposals that will reduce 
intellectual  property  protection  for  new  products  (including  potentially  shortening  the  duration  of  regulatory  data  exclusivity 
and orphan drug exclusivity protections), as well as change the reimbursement and regulatory landscape. International reference 
pricing has been widely used by many countries outside the United States to control costs based on an external benchmark of a 
product’s  price  in  other  countries.  International  reference  pricing  policies  can  change  quickly  and  frequently  and  may  not 
reflect  differences  in  the  burden  of  disease,  indications,  market  structures  or  affordability  differences  across  countries  or 
regions.  Other  expenditure  control  practices,  including  but  not  limited  to  the  use  of  revenue  clawbacks,  rebates  and  caps  on 
product sales, are used in various foreign jurisdictions as well. In addition, countries may refuse to reimburse or may restrict the 
reimbursed  population  for  a  product  when  their  national  health  technology  assessments  do  not  consider  a  medicine  to 
demonstrate sufficient clinical benefit beyond existing therapies or to meet certain cost effectiveness thresholds. For example, 
despite the EMA’s approval of Repatha for the treatment of patients with established atherosclerotic disease, prior to 2020, the 
reimbursement  of  Repatha  in  France  was  limited  to  a  narrower  patient  population  (such  as  those  with  homozygous  familial 
hypercholesterolemia  (HoFH))  following  a  national  health  technology  assessment.  Many  countries  decide  on  reimbursement 
between potentially competing products through national or regional tenders that often result in one product receiving most or 
all of the sales in that country or region. Failure to obtain coverage and reimbursement for our products, a deterioration in their 
existing  coverage  and  reimbursement  or  a  decline  in  the  timeliness  or  certainty  of  payment  by  payers  to  hospitals  and  other 
providers  has  negatively  affected,  and  may  further  negatively  affect,  the  ability  or  willingness  of  healthcare  providers  to 
prescribe  our  products  for  their  patients  and  otherwise  negatively  affect  the  use  of  our  products  or  the  prices  we  realize  for 
them. Such changes have had, and could in the future have, a material adverse effect on our product sales, business and results 
of operations.

Guidelines and recommendations published by various organizations can reduce the use of our products.

Government  agencies  promulgate  regulations  and  guidelines  directly  applicable  to  us  and  to  our  products.  Professional 
societies,  practice  management  groups,  insurance  carriers,  physicians’  groups,  private  health  and  science  foundations  and 
organizations involved in various diseases also publish guidelines and recommendations to healthcare providers, administrators 
and payers, as well as patient communities. Recommendations by government agencies or other groups and organizations may 
relate to such matters as usage, dosage, route of administration and use of related therapies. In addition, a growing number of 
organizations are providing assessments of the value and pricing of biopharmaceutical products, and even organizations whose 
guidelines  have  historically  been  focused  on  clinical  matters  have  begun  to  incorporate  analyses  of  the  cost  effectiveness  of 
various  treatments  into  their  treatment  guidelines  and  recommendations.  Value  assessments  may  come  from  private 
organizations that publish their findings and offer recommendations relating to the products’ reimbursement by government and 
private payers. Some companies and payers have announced pricing and payment decisions based in part on the assessments of 
private  organizations.  In  addition,  government  health  technology  assessment  organizations  in  many  countries  make 
reimbursement  recommendations  to  payers  in  their  jurisdictions  based  on  the  clinical  effectiveness,  cost-effectiveness  and 
service effects of new, emerging and existing medicines and treatments. Such health technology assessment organizations have 
recommended, and may in the future recommend, reimbursement for certain of our products for a narrower indication than was 

33

approved  by  applicable  regulatory  agencies  or  may  recommend  against  reimbursement  entirely.  See  Our  sales  depend  on 
coverage and reimbursement from government and commercial third-party payers, and pricing and reimbursement pressures 
have  affected,  and  are  likely  to  continue  to  affect,  our  profitability.  The  EU  has  adopted  regulations,  effective  beginning  in 
January  2025,  that  are  intended  to  increase  cooperation  among  EU  member  states  and  harmonize  various  procedures  and 
standards at the EU level in assessing health technologies and in support of joint clinical assessments of health technologies and 
medicines.  These  and  other  such  recommendations  or  guidelines  may  affect  our  reputation,  and  any  recommendations  or 
guidelines that result in decreased use, dosage or reimbursement of our products could have a material adverse effect on our 
product sales, business and results of operations. In addition, the perception by the investment community or stockholders that 
such recommendations or guidelines will result in decreased use and dosage of our products could adversely affect the market 
price of our common stock.

We could be subject to additional tax liabilities, including from an adverse outcome in our ongoing tax dispute with the 
IRS  and  other  tax  examinations,  enactment  of  the  OECD  minimum  corporate  tax  rate  agreement  and  the  adoption  and 
interpretation of new tax legislation, and we anticipate additional tax liabilities from certain provisions of the 2017 Tax Act 
that will go into effect in 2026; such tax liabilities could adversely affect our profitability and results of operations.

We are subject to income and other taxes in the United States and other jurisdictions in which we do business. As a result, 
our  provision  for  income  taxes  is  derived  from  a  combination  of  applicable  tax  rates  in  the  various  places  we  operate. 
Significant judgment is required for determining our provision for income tax.

One or more of our legal entities file income tax returns in the U.S. federal jurisdiction, various U.S. state jurisdictions 
and  foreign  jurisdictions.  Our  income  tax  returns  are  routinely  examined  by  tax  authorities  in  those  jurisdictions.  Significant 
disputes can and have arisen with tax authorities involving issues regarding the timing and amount of deductions, the use of tax 
credits and allocations of income and expenses among various tax jurisdictions because of differing interpretations of tax laws, 
regulations and relevant facts, and such tax authorities (including the IRS) are becoming more aggressive in their audits and are 
particularly focused on such matters. In 2017, we received an RAR and a modified RAR from the IRS for the years 2010–2012, 
proposing significant adjustments that primarily relate to the allocation of profits between certain of our entities in the United 
States  and  the  U.S.  territory  of  Puerto  Rico.  We  disagreed  with  the  proposed  adjustments  and  calculations  and  pursued 
resolution with the IRS administrative appeals office but were unable to reach resolution. In July 2021, we filed a petition in the 
U.S. Tax Court to contest two duplicate Statutory Notices of Deficiency (Notices) for the years 2010–2012 that we received in 
May and July 2021 which seek to increase our U.S. taxable income for the years 2010–2012.

In  2020,  we  received  an  RAR  and  a  modified  RAR  from  the  IRS  for  the  years  2013–2015,  also  proposing  significant 
adjustments  that  primarily  relate  to  the  allocation  of  profits  between  certain  of  our  entities  in  the  United  States  and  the  U.S. 
territory of Puerto Rico similar to those proposed for the years 2010–2012. We disagreed with the proposed adjustments and 
calculations and pursued resolution with the IRS appeals office but were unable to reach resolution. In July 2022, we filed a 
petition in the U.S. Tax Court to contest a Notice for the years 2013–2015 that we previously reported receiving in April 2022 
that seeks to increase our U.S. taxable income for the years 2013–2015 and asserts penalties.

We firmly believe that the IRS positions set forth in the 2010–2012 and 2013–2015 Notices are without merit. We are 
contesting the 2010–2012 and 2013–2015 Notices through the judicial process. The cases were consolidated on December 19, 
2022.

We are currently also under examination by the IRS for the years 2016–2018 with respect to issues similar to those for the 

2010 through 2015 period. In addition, we are under examination by a number of state and foreign tax jurisdictions.

Final resolution of these complex tax matters is not likely within the next 12 months. We continue to believe our accrual 
for income tax liabilities is appropriate based on past experience, interpretations of tax law, application of the tax law to our 
facts and judgments about potential actions by tax authorities; however, due to the complexity of the provision for income taxes 
and uncertain resolution of these matters, the ultimate outcome of any tax matters may result in payments substantially greater 
than amounts accrued and could have a material adverse effect on the results of our operations.

See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Results of 

Operations, Income Taxes, and Part IV—Note 7, Income taxes, to the Consolidated Financial Statements.

Our  provision  for  income  taxes  and  results  of  operations  in  the  future  could  be  adversely  affected  by  changes  to  our 
operating structure, changes in the mix of income and expenses in countries with differing tax rates, changes in the valuation of 
deferred tax assets and liabilities and changes in applicable tax laws, regulations or administrative interpretations thereof. The 
2017  Tax  Act  is  complex  and  a  large  volume  of  regulations  and  guidance  has  been  issued  and  could  be  subject  to  different 
interpretations. We could face audit challenges to our application of the 2017 Tax Act. 

34

As  previously  reported,  the  OECD  reached  an  agreement  to  align  countries  on  a  minimum  corporate  tax  rate  and  an 
expansion of the taxing rights of market countries. Effective January 1, 2024, select individual countries, including the United 
Kingdom and EU member countries, have enacted the global minimum tax agreement. Our legal entities in the countries that 
have enacted the agreement, along with their direct and indirect subsidiaries, are now subject to a 15% minimum tax rate on 
adjusted financial statement income. Additional provisions of the OECD agreement may come into effect in future years, and 
the  OECD  is  expected  to  continue  to  release  additional  guidance  that  may  impact  the  application  and  interpretation  of  the 
agreement that could further increase our tax liabilities. Other countries, including the United States and the U.S. territory of 
Puerto  Rico,  have  not  yet  enacted  the  OECD  agreement  and  implementation  remains  highly  uncertain.  The  continued 
enactment of the agreement, either by all OECD participants or unilaterally by individual countries, could result in tax increases 
or double taxation in the United States or foreign jurisdictions. 

The tax rates associated with certain international provisions of the 2017 Tax Act are set to increase beginning in 2026. If 
those changes take effect as scheduled, we anticipate that the overall U.S. tax rate on our foreign income would increase. The 
Administration and U.S. Congress continue to discuss various proposals that would change the international provisions of the 
2017 Tax Act and other corporate provisions of U.S. tax law. Changes to existing tax law in the United States, the U.S. territory 
of Puerto Rico or other jurisdictions, including the changes and potential changes discussed above, could result in tax increases 
where we do business and could have a material adverse effect on the results of our operations.

Our business may be affected by litigation and government investigations.

We  and  certain  of  our  subsidiaries  are  involved  in  legal  proceedings.  See  Part  IV—Note  20,  Contingencies  and 
commitments,  to  the  Consolidated  Financial  Statements.  Civil  and  criminal  litigation  is  inherently  unpredictable,  and  the 
outcome can result in costly verdicts, fines and penalties, exclusion from federal healthcare programs and/or injunctive relief 
that affect how we operate our business. Defense of litigation claims can be expensive, time consuming and distracting, and it is 
possible that we could incur judgments or enter into settlements of claims for monetary damages or change the way we operate 
our business, which could have a material adverse effect on our product sales, business and results of operations. In addition, 
product liability is a major risk in testing and marketing biotechnology and pharmaceutical products. We may face substantial 
product liability exposure in human clinical trials and for products we sell after regulatory approval. Product liability claims, 
regardless of their merits, could be costly and divert management’s attention and could adversely affect our reputation and the 
demand  for  our  products.  We  and  certain  of  our  subsidiaries  have  previously  been  named  as  defendants  in  product  liability 
actions for certain of our products.

We are also involved in government investigations that arise in the ordinary course of our business. In recent years, there 
has been a trend of increasing government investigations and litigations against companies operating in our industry, both in the 
United States and around the world. See Our sales depend on coverage and reimbursement from government and commercial 
third-party  payers,  and  pricing  and  reimbursement  pressures  have  affected,  and  are  likely  to  continue  to  affect,  our 
profitability.  Our  business  activities  outside  of  the  United  States  are  subject  to  the  FCPA  and  similar  antibribery  or 
anticorruption  laws,  regulations  or  rules  of  other  countries  in  which  we  operate,  including  the  U.K.  Bribery  Act.  We  cannot 
ensure that all our employees, agents, contractors, vendors, licensees, partners or collaborators will comply with all applicable 
laws and regulations. On April 25, 2019, we entered into a settlement agreement with the DOJ and the OIG of the HHS to settle 
certain allegations relating to our support of independent charitable organizations that provide patients with financial assistance 
to access their medicines. As a result, we entered into a corporate integrity agreement with the OIG that requires us to maintain 
a corporate compliance program and to undertake a set of defined corporate integrity obligations through April 2024. While we 
expect  to  fully  comply  with  all  of  our  obligations  under  the  corporate  integrity  agreement,  failure  to  do  so  could  result  in 
substantial  penalties  and  potential  exclusion  from  government  healthcare  programs.  We  may  also  see  new  government 
investigations of or actions against us citing novel theories of recovery. For example, prosecutors are placing greater scrutiny 
on  patient  support  programs,  including  commercial  copay  assistance  programs,  and  further  enforcement  actions  and 
investigations  regarding  such  programs  could  limit  our  ability  to  provide  co-pay  assistance  to  commercial  patients.  Greater 
scrutiny has also been placed on sponsorships, speaker programs and other arrangements where healthcare professionals receive 
remuneration,  travel  or  other  value  to  participate  in  certain  events,  and  further  enforcement  actions  could  limit  our  ability  to 
participate  in  such  arrangements.  Any  of  these  results  could  have  a  material  adverse  effect  on  our  business  and  results  of 
operations.

RISKS RELATED TO ECONOMIC CONDITIONS AND OPERATING A GLOBAL BUSINESS

Our efforts to collaborate with or acquire other companies, products, or technology, and to integrate the operations of 
companies or to support the products or technology we have acquired, may not be successful, and may result in unanticipated 
costs, delays or failures to realize the benefits of the transactions.

We  seek  innovation  through  significant  investment  in  both  internal  R&D  and  external  transactions,  including 
collaborations,  partnerships,  alliances,  licenses,  joint  ventures,  mergers  and  acquisitions  (collectively,  acquisition  activity). 

35

Acquisition  activities  may  be  subject  to  regulatory  approvals  or  other  requirements  that  are  not  within  our  control.  Antitrust 
scrutiny  by  regulatory  agencies  and  changes  to  regulatory  approval  process  in  the  U.S.  and  foreign  jurisdictions  may  cause 
approvals  to  take  longer  than  anticipated  to  obtain,  not  be  obtained  at  all,  or  contain  burdensome  conditions,  which  may 
jeopardize,  delay  or  reduce  the  anticipated  benefits  of  acquisitions  to  us  and  could  impede  the  execution  of  our  business 
strategy.  There  can  be  no  assurance  that  such  regulatory  or  other  approvals  will  be  obtained  or  that  all  closing  conditions 
required  in  connection  with  our  acquisition  activities  will  be  satisfied  or  waived,  which  could  result  in  us  being  unable  to 
complete the planned acquisition activities.

Acquisition activities are complex, time consuming and expensive and may result in unanticipated costs, delays or other 
operational  or  financial  problems  related  to  integrating  the  acquired  company  and  business  with  our  company,  which  may 
divert our management’s attention from other business issues and opportunities and restrict the full realization of the anticipated 
benefits of such transactions within the expected timeframe or at all. We may pay substantial amounts of cash, incur debt or 
issue  equity  securities  to  pay  for  acquisition  activities,  which  could  adversely  affect  our  liquidity  or  result  in  dilution  to  our 
stockholders, respectively. For example, the primary sources of funds for our acquisition of Horizon were those received from 
our $24 billion of senior notes issued on March 2, 2023, together with the $4 billion drawn down from our term loan facility, 
and while the Company currently has investment grade credit ratings, this substantial additional indebtedness has resulted in 
downgrades to our credit ratings. Further, failures or difficulties in integrating or retaining new personnel or in integrating the 
operations  of  the  businesses,  products  or  assets  we  acquire  (including  related  technology,  research,  development  and 
commercial operations, compliance programs, manufacturing, distribution and general business operations and procedures and 
ESG  activities)  may  affect  our  ability  to  realize  the  benefits  of  the  transaction  and  grow  our  business  and  may  result  in  us 
incurring asset impairment or restructuring charges. These and other challenges may arise in connection with our acquisitions 
of Otezla, Five Prime, Teneobio, ChemoCentryx, Horizon and/or our collaborations with BeiGene and Kyowa Kirin, or with 
other acquisition activities, which could have a material adverse effect on our business, results of operations and stock price.

We  may  not  realize  the  anticipated  strategic  benefits  of  our  acquisition  of  Horizon,  including  our  efforts  to  leverage 
Amgen’s  global  presence  and  commercial  and  medical  capabilities  in  inflammation  and  nephrology  to  accelerate  revenue 
growth  of  Horizon’s  products.  Our  assumptions  and  estimates  about  the  future  revenue  growth  of  Horizon’s  products  may 
prove to be incorrect. Sales of our rare disease products acquired through our acquisition of Horizon will depend on our ability 
to  increase  awareness  and  educate  physicians  on  the  rare  conditions  that  such  medicines  are  designed  to  treat,  as  well  as 
successfully  identifying  target  patients  and  educating  them  about  our  treatments.  We  may  also  face  greater  than  expected 
challenges  associated  with  rare  disease  drug  development  (such  as  challenges  obtaining  patients  for  clinical  trials  and/or 
regulatory approvals) and reimbursement (such as obtaining reimbursement of orphan drugs by public health systems). We are 
in the process of integrating the Horizon business into ours, including a large number of complex operational and administrative 
systems, to form a unified combined company, including with respect to human resources, intellectual property management, 
research and development activities, finance, accounting and internal control processes and systems, sales operations, product 
distribution,  commercialization  efforts,  information  and  information  security  systems,  compliance  programs  and  policies  and 
supply  chain  systems  and  third  party  relationships  (including  vendors  and  third  party  manufacturers).  For  example,  Horizon 
adds more than 30 contract manufacturing organizations (CMOs) to our operations, many of which are single source suppliers 
(including  the  CMO  that  produces  TEPEZZA  drug  substance  and  the  CMO  that  produces  all  of  our  KRYSTEXXA  drug 
substance  in  Israel  that  is  affected  by  the  current  conflict  in  Israel  and  Gaza).  Business  integrations  generally,  and  our 
integration of Horizon specifically, are complex, time consuming and expensive, and we may experience unanticipated costs, 
delays or other operational or financial challenges. These integration efforts may also divert our management’s attention and 
resources away from other business operations, which may disrupt to some degree our ongoing business. Failure to successfully 
integrate the Horizon business into ours and/or achieve its anticipated strategic benefits may result in our incurring significant 
asset impairment or restructuring charges, and could have a material adverse effect on our business, results of operations and 
stock price.

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

The  capital  and  credit  markets  may  experience  extreme  volatility  and  disruption,  which  may  lead  to  uncertainty  and 
liquidity  issues  for  both  borrowers  and  investors.  For  example,  in  early  2020,  there  were  significant  disruptions  in  the 
commercial paper market and several borrowers were unable to obtain funding at normal rates or maturities, which resulted in a 
significant increase in draws of corporate credit lines with banks. Similarly, the bond markets experienced extreme volatility in 
terms of interest rates and credit spreads, with several days without new issuances of corporate bonds. 

While we have historically accessed capital markets to supplement our existing funds and cash generated from operations 
to satisfy our needs for capital expenditures, debt service requirements, to pay dividends and repurchase stock, and engage in 
other  business  initiatives,  including  acquisitions  and  licensing  activities,  in  2023,  we  substantially  increased  our  outstanding 
indebtedness in connection with our acquisition of Horizon, which may limit our ability to timely obtain additional financing on 
desired terms. See Our efforts to collaborate with or acquire other companies, products, or technology, and to integrate the 

36

operations of companies or to support the products or technology we have acquired, may not be successful, and may result in 
unanticipated  costs,  delays  or  failures  to  realize  the  benefits  of  the  transactions.  While  our  plans  include  reducing  our  debt 
leverage levels before returning to the capital or credit markets for new funds, if we are required to access the capital and credit 
markets  at  an  inopportune  time,  including  when  adverse  capital  and  credit  market  conditions  prevail,  we  may  be  unable  to 
obtain  financing  on  favorable  terms,  or  at  all,  which  could  have  a  material  adverse  effect  on  our  business  and  results  of 
operations  or  our  ability  to  complete  business  acquisitions.  Changes  in  credit  ratings  issued  by  nationally  recognized  credit-
rating  agencies  could  also  adversely  affect  our  ability  to  obtain  capital  and  credit  market  financing  and  the  cost  of  such 
financing and have an adverse effect on the market price of our securities.

A  breakdown  of  our  information  technology  systems,  cyberattack  or  information  security  breach  could  significantly 
compromise  the  confidentiality,  integrity  and  availability  of  our  information  technology  systems,  network-connected  control 
systems and/or our data, interrupt the operation of our business and/or affect our reputation.

To  achieve  our  business  objectives,  we  rely  on  sophisticated  information  technology  systems,  including  hardware, 
software,  technology  infrastructure,  online  sites  and  networks  for  both  internal  and  external  operations,  mobile  applications, 
cloud  services  and  network-connected  control  systems,  some  of  which  are  managed,  hosted,  provided  or  serviced  by  third 
parties. Internal or external events that compromise the confidentiality, integrity and availability of our systems and data may 
significantly interrupt the operation of our business, result in significant costs and/or adversely affect our reputation.

Our information technology systems are highly integrated into our business, including our R&D efforts, our clinical and 
commercial  manufacturing  processes  and  our  product  sales  and  distribution  processes.  Further,  as  the  majority  of  our 
employees work remotely for some portion of their jobs in our hybrid work environment, our reliance on our and third-party 
information technology systems has increased substantially and is expected to continue to increase. Remote and hybrid working 
arrangements,  including  those  of  at  many  third-party  providers,  can  increase  cybersecurity  risks  due  to  the  challenges 
associated  with  managing  remote  computing  assets  and  security  vulnerabilities  that  are  present  in  many  non-corporate  and 
home  networks.  The  complexity  and  interconnected  nature  of  software,  hardware  and  our  systems  make  them  vulnerable  to 
breakdown or other service interruptions, and to software errors or defects, misconfiguration and other security vulnerabilities. 
Upgrades or changes to our systems or the software that we use have resulted and we expect, in the future, will result in the 
introduction  of  new  cybersecurity  vulnerabilities  and  risks.  In  2022,  we  identified  a  number  of  security  vulnerabilities 
introduced into our information systems as a result of flaws that we subsequently identified in software that we had purchased 
and installed, and these flaws required that we apply emergency patches to certain of our systems. While we did not experience 
any  significant  adverse  effects  as  a  result  of  these  vulnerabilities,  there  can  be  no  assurance  that  we  will  timely  identify  and 
address  future  vulnerabilities.  Our  systems  are  also  subject  to  frequent  perimeter  network  reconnaissance  and  scanning, 
phishing and other cyberattacks. For example, as a result of our cybersecurity monitoring of the Horizon legacy information 
systems,  we  detected  phishing  activity  in  the  accounts  of  two  Horizon  executives.  These  accounts  were  de-activated,  the 
incidents were investigated and the determination was made separately by both our internal cybersecurity team and our external 
digital  forensics  and  incident  response  supplier  that  no  confidential  information  had  been  exfiltrated.  As  the  cyber-threat 
landscape evolves, these attacks are growing in frequency, sophistication, and intensity, and are becoming increasingly difficult 
to  detect  and  increasingly  sophisticated  in  using  techniques  and  tools—including  artificial  intelligence—that  circumvent 
security  controls,  evade  detection  and  remove  forensic  evidence.  Such  attacks  could  include  the  use  of  harmful  and  virulent 
malware,  including  ransomware  or  other  denials  of  service,  which  can  be  deployed  through  various  means,  including  the 
software supply chain, e-mail, malicious websites and/or the use of social engineering/phishing. 

We have also experienced denial of service attacks against our network, and, although such attacks did not succeed, there 
can  be  no  assurance  that  our  efforts  to  guard  against  the  wide  and  growing  variety  of  potential  attack  techniques  will  be 
successful in the future. Attacks such as those experienced by government entities (including those that approve and/or regulate 
our  products,  such  as  the  EMA)  and  other  multi-national  companies,  including  some  of  our  peers,  could  leave  us  unable  to 
utilize  key  business  systems  or  access  or  protect  important  data,  and  could  have  a  material  adverse  effect  on  our  ability  to 
operate  our  business,  including  developing,  gaining  regulatory  approval  for,  manufacturing,  selling  and/or  distributing  our 
products.  For  example,  in  2017,  a  pharmaceutical  company  experienced  a  cyberattack  involving  virulent  malware  that 
significantly disrupted its operations, including its research and sales operations and the production of some of its medicines 
and  vaccines.  As  a  result  of  the  cyberattack,  its  orders  and  sales  for  certain  products  were  negatively  affected.  In  late  2020, 
SolarWinds  Corporation,  a  leading  provider  of  software  for  monitoring  and  managing  information  technology  infrastructure, 
disclosed that it had suffered a cybersecurity incident whereby attackers had inserted malicious code into legitimate software 
updates  for  its  products  that  were  installed  by  myriad  private  and  government  customers,  enabling  the  attackers  to  access  a 
backdoor  to  such  systems.  In  2022,  Okta,  Inc.,  a  provider  of  software  that  helps  companies  manage  user  authentication, 
disclosed that several hundred of its corporate customers were vulnerable to a security breach that allowed attackers to access 
Okta’s internal network. Although this breach did not have a significant effect on our business, there can be no assurance that a 
similar future breach would not result in a material adverse effect on our business or results of operations. 

37

Our systems also contain and use a high volume of sensitive data, including intellectual property, trade secrets and other 
proprietary  business  information,  financial  information,  regulatory  information,  strategic  plans,  sales  trends  and  forecasts, 
litigation  materials  and/or  personal  identifiable  information  belonging  to  us,  our  staff,  our  patients,  customers  and/or  other 
parties. In some cases, we utilize third-party service providers to collect, process, store, manage or transmit such data, which 
have  increased  our  risk.  Intentional  or  inadvertent  data  privacy  or  security  breaches  (including  cyberattacks)  resulting  from 
attacks  or  lapses  by  employees,  service  providers  (including  providers  of  information  technology-specific  services),  business 
partners,  nation  states  (including  groups  associated  with  or  supported  by  foreign  intelligence  agencies),  organized  crime 
organizations,  “hacktivists”  or  others,  create  risks  that  our  sensitive  data  may  be  exposed  to  unauthorized  persons,  our 
competitors or the public. System vulnerabilities and/or cybersecurity breaches experienced by our third-party service providers 
have constituted a substantial share of the information security risks that have affected us. For example, in the first half of 2021, 
a supplier experienced a data breach in which an unauthorized third party acquired access to certain information provided to the 
supplier in the course of its provision of services to us, including business documents and certain personally identifiable patient 
information (not including social security or other financial or health insurance information). As required, we promptly notified 
the  applicable  state  attorneys  general  and  the  individuals  whose  personally  identifiable  information  was  affected  of  this  data 
breach at the supplier. In the third quarter of 2022, another service provider experienced a similar cybersecurity breach in which 
an attacker exfiltrated certain data (including non-significant Amgen data) from the service provider’s systems. Although these 
supplier data breaches have not resulted in material adverse effects on our business, there can be no assurance that a similar 
future cybersecurity incident would not result in a material adverse effect on our business or results of operations. Further, the 
timeliness  of  our  awareness  of  a  cybersecurity  incident  affects  our  ability  to  respond  to  and  work  to  mitigate  the  severity  of 
such events. For example, in 2020 and 2022, two of our vendors experienced cyberattacks and each initially reported to us that 
neither event involved our data. However, upon further investigation, they each subsequently informed us that the attackers had 
accessed limited, non-significant Amgen information. Although neither of these breaches had a significant adverse effect on our 
business, in the future we may again not receive timely reporting of cybersecurity events and such events could have a material 
adverse effect on our business.

Cyberattackers  are  also  increasingly  exploiting  vulnerabilities  in  commercially  available  software  from  shared  or  open-
source code. We rely on third party commercial software that have had and may have such vulnerabilities, but as use of open-
source code is frequently not disclosed, our ability to fully assess this risk to our systems is limited. For example, in December 
2021,  a  remote  code  execution  vulnerability  was  discovered  in  a  software  library  that  is  widely  used  in  a  variety  of 
commercially available software and services. Although this vulnerability has not resulted in any significant adverse effects on 
us, there can be no assurances that a similar future vulnerability in the software and services that we use would not result in a 
material adverse effect on our business or results of operations. 

Domestic and global government regulators, our business partners, suppliers with whom we do business, companies that 
provide us or our partners with business services and companies we have acquired or may acquire face similar risks. Security 
breaches of their systems or service outages have adversely affected systems and could, in the future, affect our systems and 
security, leave us without access to important systems, products, raw materials, components, services or information, or expose 
our confidential data or sensitive personal information. For example, in 2019, two vendors that perform testing and analytical 
services that we use in developing and manufacturing our products experienced cyberattacks, and in April and September of 
2020, vendors that provide us with information technology services and clinical data services, respectively, each experienced 
ransomware  attacks.  Although  there  was  no  breach  of  our  systems,  each  of  these  incidents  required  us  to  disconnect  our 
systems  from  those  vendors’  systems.  While  we  were  able  to  reconnect  our  systems  following  restoration  of  these  vendors’ 
capabilities without significantly affecting product availability, a more extended service outage affecting these or other vendors, 
particularly where such vendor is the single source from which we obtain the services, could have a material adverse effect on 
our  business  or  results  of  operations.  In  addition,  we  distribute  our  products  in  the  United  States  primarily  through  three 
pharmaceutical wholesalers, and a security breach that impairs the distribution operations of our wholesalers could significantly 
impair our ability to deliver our products to healthcare providers and patients. There can be no assurance that our cybersecurity 
risk management program and processes, including our policies, controls, or procedures, will be fully implemented, complied 
with or effective in protecting our information technology systems and sensitive data.

Although  we  have  experienced  system  breakdowns,  attacks  and  information  security  breaches,  we  do  not  believe  such 
breakdowns, attacks and breaches have had a material adverse effect on our business or results of operations. We will continue 
to  experience  varying  degrees  of  cyberattacks  and  other  incidents  in  the  future.  Even  though  we  continue  to  invest  in  the 
monitoring,  protection  and  resilience  of  our  critical  and/or  sensitive  data  and  systems,  there  can  be  no  assurances  that  our 
efforts will detect, prevent or fully recover systems or data from all breakdowns, service interruptions, attacks and/or breaches 
of  our  systems  that  could  adversely  affect  our  business  and  operations  and/or  result  in  the  loss  or  exposure  of  critical, 
proprietary,  private,  confidential  or  otherwise  sensitive  data,  which  could  result  in  material  financial,  legal  business  or 
reputational harm to us or negatively affect our stock price. While we maintain cyber-liability insurance, our insurance is not 
sufficient to cover us against all losses that could potentially result from a service interruption, breach of our systems or loss of 
our critical or sensitive data.

38

We  are  also  subject  to  various  laws  and  regulations  globally  regarding  privacy  and  data  protection,  including  laws  and 
regulations relating to the collection, storage, handling, use, disclosure, transfer and security of personal data. The legislative 
and regulatory environment regarding privacy and data protection is continuously evolving and developing and the subject of 
significant attention globally. For example, we are subject to the EU’s GDPR, which became effective in May 2018, and the 
CCPA, which became effective in January 2020, both of which provide for substantial penalties for noncompliance. The CCPA 
was  amended  in  late  2020,  to  create  the  California  Privacy  Rights  Act  to  create  opt  in  requirements  for  the  use  of  sensitive 
personal data and the formation of a new dedicated agency for the enforcement of the law, the California Privacy Protection 
Agency.  Similar  consumer  privacy  laws  went  into  effect  in  Virginia,  Colorado,  Utah,  Connecticut  and  Florida  in  2023. 
Consumer privacy laws were also passed in eleven other states, with the earliest effective dates later this year, and proposed in 
three  additional  states.  Outside  the  United  States,  other  jurisdictions  where  we  operate  have  passed,  or  continue  to  propose, 
similar legislation and/or regulations. For example, in China, the Personal Information Protection Law and the Data Security 
Law, which regulate data processing activities associated with personal and nonpersonal data, are in effect and build upon the 
existing  Cybersecurity  Law.  Failure  to  comply  with  these  current  and  future  laws  could  result  in  significant  penalties  and 
reputational harm and could have a material adverse effect on our business and results of operations.

Our sales and operations are subject to the risks of doing business internationally, including in emerging markets.

As  we  continue  our  expansion  efforts  in  emerging  markets  around  the  world,  through  acquisitions  and  licensing 
transactions as well as through the development and introduction, both independently and through collaborations such as our 
collaboration with BeiGene, of our products in new markets, we face numerous risks to our business. There is no guarantee that 
our efforts and strategies to expand sales in emerging markets will succeed. Our international business, including in China and 
emerging market countries, may be especially vulnerable to periods of global and local political, legal, regulatory and financial 
instability, including issues of geopolitical relations, the imposition of international sanctions in response to certain state actions 
and/or sovereign debt issues, and management of health policy in response to pressures such as global pandemics. If relations 
between  the  United  States  and  other  governments  deteriorate,  our  business  and  investments  in  such  markets  may  also  be 
adversely  affected.  We  may  also  be  required  to  increase  our  reliance  on  third-party  agents  and  unfamiliar  operations  and 
arrangements including those previously utilized by companies we partner with or acquire in emerging markets. See We must 
conduct clinical trials in humans before we commercialize and sell any of our product candidates or existing products for new 
indications. Our expansion efforts in China and emerging markets around the world are dependent upon the establishment of an 
environment that is predictable, navigable and supportive of biopharmaceutical innovation, sustained access for our products 
and predictable pricing controls. For example, China continues to strengthen regulations on the collection, use and transmission 
of Chinese human genetic resources, and has expanded regulations on the conduct of biotechnology R&D activities in China. 
Between 2020 and 2022, we experienced delays in our applications to the Human Genetic Resources Administration of China 
that sought approval to conduct clinical trials in China. Our international operations and business may also be subject to less 
protective intellectual property or other applicable laws, diverse data privacy and protection requirements, changing tax laws 
and tariffs, trade restrictions or other barriers designed to protect industry in the home country against foreign competition, far-
reaching antibribery and anticorruption laws and regulations and/or evolving legal and regulatory environments. For example, 
recent  cross-border  data  transfer  compliance  requirements  in  China  may  also  impose  additional  costs  of  doing  business, 
including costs associated with localizing operations.

In  response  to  the  ongoing  armed  conflict  in  Ukraine,  the  U.S.  government,  numerous  state  governments,  the  EU  and 
other  countries  in  which  we  conduct  business  have  imposed  a  wide  range  of  economic  sanctions  that  restrict  commerce  and 
business dealings with Russia, certain regions of Ukraine and certain entities and individuals. Additionally, the armed conflict 
in  the  Middle  East  that  has  been  ongoing  since  October  2023  has  caused  regional  disruptions  to  economic  activity.  For  a 
description of the conflict’s impact on our third-party contract manufacturing of KRYSTEXXA, see Our efforts to collaborate 
with  or  acquire  other  companies,  products,  or  technology,  and  to  integrate  the  operations  of  companies  or  to  support  the 
products or technology we have acquired, may not be successful, and may result in unanticipated costs, delays or failures to 
realize  the  benefits  of  the  transactions.  These  conflicts  may  also  precipitate  or  amplify  the  other  risks  described  herein, 
including risks relating to cybersecurity, global economic conditions, clinical trials and supply chains, which could adversely 
affect our business, operations and financial condition and results.

As we expand internationally, we are subject to fluctuations in foreign currency exchange rates relative to the U.S. dollar. 
While  we  have  a  program  in  place  that  is  designed  to  reduce  our  exposure  to  foreign  currency  exchange  rate  fluctuations 
through foreign currency hedging arrangements, our hedging efforts do not completely offset the effect of these fluctuations on 
our  revenues  and  earnings.  Overall,  the  legal  and  operational  challenges  of  our  international  business  operations,  along  with 
government controls, the challenges of attracting and retaining qualified personnel and obtaining and/or maintaining necessary 
regulatory  or  pricing  approvals  of  our  products,  may  result  in  material  adverse  effects  on  our  international  product  sales, 
business and results of operations.

39

RISKS RELATED TO COMPETITION

Our products face substantial competition and our product candidates are also likely to face substantial competition.

We operate in a highly competitive environment. See Item 1. Business—Marketing, Distribution and Selected Marketed 
Products—Competition.  We  expect  that  our  products  and  product  candidates  will  compete  with  existing  drugs,  new  drugs 
currently in development, drugs currently approved for other indications that may later be approved for the same indications as 
those  of  our  products  and  drugs  approved  for  other  indications  that  are  used  off-label.  Large  pharmaceutical  companies  and 
generics  manufacturers  of  pharmaceutical  products  have  expanded  into,  and  are  expected  to  continue  expanding  into,  the 
biotechnology  field,  and  some  pharmaceutical  companies  and  generics  manufacturers  have  formed  partnerships  to  pursue 
biosimilars. With the proliferation of companies pursuing biopharmaceuticals, several of our biosimilar products have entered, 
and a number of our product candidates may enter, markets with one or more competitors or with competitors soon to arrive. In 
addition,  some  of  our  competitors  may  have  technical,  competitive  or  other  advantages  over  us  for  the  development  of 
technologies and processes or greater experience in particular therapeutic areas, and consolidation among pharmaceutical and 
biotechnology companies can enhance such advantages. These advantages may make it difficult for us to compete with them 
successfully to discover, develop and market new products and for our current products to compete with new products or new 
product indications they may bring to market. As a result, our products have been competing and may continue to compete, and 
our product candidates may compete, against products or product candidates that offer higher rebates or discounts, lower prices, 
equivalent  or  superior  efficacy,  better  safety  profiles,  easier  administration,  earlier  market  availability  or  other  competitive 
features. If we are unable to compete effectively, this could reduce our sales, which could have a material adverse effect on our 
business and results of operations.

Our intellectual property positions may be challenged, invalidated or circumvented, or we may fail to prevail in current 

and future intellectual property litigation.

Our success depends in part on our ability to obtain and defend patent rights and other intellectual property rights that are 
important  to  the  commercialization  of  our  products  and  product  candidates.  The  patent  positions  of  pharmaceutical  and 
biotechnology companies can be highly uncertain and often involve complex legal, scientific and factual questions. Driven by 
cost  pressures,  efforts  to  limit  or  weaken  patent  protection  for  our  industry  are  increasing.  For  example,  the  COVID-19 
pandemic has resulted in increased interest in compulsory licenses, march-in rights or other governmental interventions, both in 
the United States and internationally, related to the procurement of drugs, and the World Trade Organization has agreed to a 
waiver  of  COVID-19  vaccine  intellectual  property  protections  through  the  Trade-Related  Aspects  of  Intellectual  Property 
Rights waiver process. Also, in December 2023, the Administration released a proposed framework that would consider price 
as a factor when determining whether to exercise march-in rights pursuant to the Bayh-Dole Act with respect to drugs or other 
taxpayer-funded inventions. Third parties have challenged and may continue to challenge, invalidate or circumvent our patents 
(including any patent applications, term extensions, term adjustments and supplemental protection certificates) relating to our 
products,  product  candidates  and  technologies.  See  Part  IV—Note  20,  Contingencies  and  commitments,  to  the  Consolidated 
Financial Statements. Challenges to patents may come from potential competitors or from parties other than those who seek to 
market a potentially-infringing product. In addition, our patent positions might not protect us against competitors with similar 
products or technologies because competing products or technologies may not infringe our patents. For certain of our product 
candidates, there are third parties who have patents or pending patent applications that they may claim necessitate payment of a 
royalty or prevent us from commercializing these product candidates in certain territories. Further, disputes may arise with third 
parties  from  whom  we  have  licensed  rights  to  intellectual  property  necessary  for  the  development  and  commercialization  of 
some of our products. For example, we are in a dispute with Roche regarding a license agreement that we acquired through our 
acquisition of Horizon for patents and know-how for TEPEZZA. Patent disputes are frequent, costly and can preclude, delay or 
increase  the  cost  of  commercialization  of  products.  We  have  been  in  the  past,  are  currently  and  expect  to  be  in  the  future, 
involved  in  patent  litigation.  These  matters  have  included,  and  may  in  the  future  include,  litigation  with  manufacturers  of 
products that purport to be biosimilars of certain of our products for patent infringement, invalidity, unenforceability and failure 
to comply with certain provisions of the BPCIA. A determination made by a court, agency or tribunal concerning infringement, 
validity, enforceability, injunctive or economic remedy, or the right to patent protection, for example, are typically subject to 
appellate  or  administrative  review.  Upon  review,  such  initial  determinations  may  be  afforded  little  or  no  deference  by  the 
reviewing tribunal and may be affirmed, reversed or made the subject of reconsideration through further proceedings. A patent 
dispute or litigation has not discouraged, and may not in the future discourage, a potential violator from bringing the allegedly 
infringing product to market prior to a final resolution of the dispute or litigation. The period from inception until resolution of 
a patent dispute or litigation is subject to the availability and schedule of the court, agency or tribunal before which the dispute 
or litigation is pending. We have been, and may in the future be, subject to competition during this period and may not be able 
to recover fully from the losses, damages and harms we incur from infringement by the competitor product even if we prevail. 
Moreover, if we lose or settle current or future litigations at certain stages or entirely, we could be subject to competition and/or 
significant  liabilities,  be  required  to  enter  into  third-party  licenses  for  the  infringed  product  or  technology  or  be  required  to 

40

cease using the technology or product in dispute. In addition, we cannot guarantee that such licenses will be available on terms 
acceptable to us, or at all.

Further, under the Hatch–Waxman Act, our products approved by the FDA under the FDCA have been, and may in the 
future  be,  the  subject  of  patent  litigation  with  generics  competitors  before  expiry  of  the  five-year  period  of  data  exclusivity 
provided  for  under  the  Hatch-Waxman  Act  and  prior  to  the  expiration  of  the  patents  listed  for  the  product.  Likewise,  our 
innovative biologic products have been, and may in the future be, the subject of patent litigation prior to the expiration of our 
patents and, with respect to competitors seeking approval as a biosimilar or interchangeable version of our products, prior to the 
12-year exclusivity period provided under the BPCIA. In addition, we have faced, and may in the future face, patent litigation 
involving  claims  that  our  biosimilar  product  candidates  infringe  the  patents  of  other  companies,  including  those  that 
manufacture,  market  or  sell  the  applicable  reference  products  or  who  are  developing  or  have  developed  other  biosimilar 
versions of such products. Alternatively, patents held by other entities have contributed, and may in the future contribute, to a 
decision by us to not pursue all of the same labeled indications as are held by these companies. While we have attempted, and 
expect to continue to attempt, to challenge the patents held by other companies, our efforts may be unsuccessful. For examples 
of and information related to our patent litigation, see Part IV—Note 20, Contingencies and commitments, to the Consolidated 
Financial Statements.

Certain  of  the  existing  patents  on  our  products  have  expired  or  will  soon  expire.  See  Item  1.  Business—Marketing, 
Distribution  and  Selected  Marketed  Products—Patents.  As  our  patents  expire,  competitors  are  able  to  legally  produce  and 
market similar products or technologies, including biosimilars, which has had, and may continue to have, a material adverse 
effect on our product sales, business and results of operations. In addition, competitors have been, and may continue to be, able 
to invalidate, design around or otherwise circumvent our patents and sell competing products.

We currently face competition from biosimilars and generics and expect to face increasing competition from biosimilars 

and generics in the future.

We currently face competition from biosimilars and generics in most of the territories in which we operate, including the 
United  States  and  Europe,  and  we  expect  to  face  increasing  biosimilar  and/or  generics  competition  this  year  and  beyond. 
Expiration or successful challenge of applicable patent rights or expiration of an applicable exclusivity period has accelerated 
such competition, and we expect to face more litigation regarding the validity and/or scope of our patents. Our products have 
also experienced greater competition from lower cost biosimilars or generics that come to market when branded products that 
compete with our products lose their own patent protection. To the extent that governments adopt more permissive regulatory 
approval standards and competitors are able to obtain broader or expedited marketing approval for biosimilars and generics, the 
rate of increased competition for our products would likely accelerate.

In  the  EU,  biosimilars  are  evaluated  for  marketing  authorization  pursuant  to  a  set  of  general  and  product  class-specific 
guidelines.  In  addition,  in  an  effort  to  spur  biosimilar  utilization  and/or  increase  potential  healthcare  savings,  some  EU 
countries and some Canadian provinces have adopted, or are considering the adoption of, biosimilar uptake measures such as 
physician prescribing quotas or automatic pharmacy substitution of biosimilars for the corresponding reference products. Some 
EU countries impose automatic price reductions upon market entry of one or more biosimilar competitors. In September 2022, 
the  EMA  and  the  EU  Heads  of  Medicines’  Agencies  (HMA)  issued  a  joint  statement  providing  that  biosimilar  medicines 
approved  in  the  EU  are  “interchangeable”  with  their  reference  products  and  other  biosimilars  of  the  same  reference  product. 
This  EMA-HMA  statement  could  further  contribute  to  the  prescribing  of  biosimilars  and  to  greater  competition  in  Europe. 
While the degree of competitive effects of biosimilar competition differs between EU countries and between products, in the 
EU the overall use of biosimilars and the rate at which product sales of innovative products are being affected by biosimilar 
competition is increasing.

In the United States, the BPCIA authorizes the FDA to approve biosimilars via a separate, abbreviated pathway. See Item 
1.  Business—Government  Regulation—Regulation  in  the  United  States—Approval  of  Biosimilars.  In  the  United  States,  the 
FDA has approved numerous biosimilars, including biosimilar versions of Neulasta, EPOGEN and ENBREL, and a growing 
number  of  companies  have  announced  that  they  are  also  developing  biosimilar  versions  of  our  products.  For  example,  six 
biosimilar  versions  of  Neulasta  are  now  approved  in  the  United  States,  including  an  on-body  injector  presentation  that  was 
approved  in  December  2023  for  a  Neulasta  biosimilar,  and  we  expect  that  other  biosimilar  versions  of  Neulasta  may  be 
marketed  or  receive  approval  in  the  future.  Impact  to  our  Neulasta  sales  has  accelerated  as  additional  competitors  have 
launched.  See  Item  1.  Business—Marketing,  Distribution  and  Selected  Marketed  Products—Competition.  Manufacturers  of 
biosimilars have attempted, and may in the future attempt, to compete with our products by offering lower list prices, greater 
discounts or rebates, or contracts that offer longer-term pricing or a broader portfolio of other products. Companies pursuing 
development of biosimilar versions of our products have challenged and may continue to challenge our patents well in advance 
of  the  expiration  of  our  material  patents.  For  examples  of  and  information  related  to  our  biosimilars  and  generics  patent 
litigation,  see  Part  IV—Note  20,  Contingencies  and  commitments,  to  the  Consolidated  Financial  Statements.  See  Our 

41

intellectual property positions may be challenged, invalidated or circumvented, or we may fail to prevail in current and future 
intellectual property litigation.

The  U.S.  biosimilar  pathway  includes  the  option  for  biosimilar  products  that  meet  certain  criteria  to  be  approved  as 
interchangeable with their reference products. Some companies currently developing or already marketing biosimilars may seek 
to obtain interchangeable status from the FDA, which could potentially allow pharmacists to substitute those biosimilars for our 
reference  products  without  prior  approval  from  the  prescriber  in  most  states  under  state  law.  The  FDA  approved  the  first 
interchangeable  biosimilar  in  2021  and  has  subsequently  granted  interchangeability  designations  to  additional  biosimilars, 
including  without  always  requiring  a  switching  study.  For  example,  in  August  2022,  the  FDA  designated  a  monoclonal 
antibody biosimilar as interchangeable without requiring a switching study to support the interchangeability determination, and 
has continued to make other such designations of interchangeability on a case-by-case basis. 

In addition, critics of the 12-year exclusivity period in the biosimilar pathway law will likely continue to seek to shorten 
the  data  exclusivity  period  and/or  to  encourage  the  FDA  to  interpret  narrowly  the  law’s  provisions  regarding  which  new 
products  receive  data  exclusivity.  In  2019,  the  Administration  agreed  to  remove  from  the  United  States-Mexico-Canada 
Agreement a requirement for at least 10 years of data exclusivity for biologic products. Also, the FDA is considering whether 
subsequent  changes  to  a  licensed  biologic  would  be  protected  by  the  remainder  of  the  reference  product’s  original  12-year 
exclusivity  period  (a  concept  known  in  the  generic  drug  context  as  “umbrella  exclusivity”).  If  the  FDA  were  to  decide  that 
umbrella exclusivity does not apply to biological reference products or were to make other changes to the exclusivity period, 
this could expose us to biosimilar competition at an earlier time. There also have been, and may continue to be, legislative and 
regulatory  efforts  to  promote  competition  through  policies  enabling  easier  generic  and  biosimilar  approval  and 
commercialization,  including  efforts  to  lower  standards  for  demonstrating  biosimilarity  or  interchangeability,  eliminate  the 
standard for interchangeability and declare by law that all biosimilars are de facto interchangeable with their reference products, 
limit patents that may be litigated and/or patent settlements, implement preferential reimbursement policies for biosimilars and 
pass new laws requiring more disclosure in the FDA’s Orange Book and Purple Book. For example, in 2021 the FDA sent a 
letter to the USPTO describing ways to strengthen coordination between the two agencies, offered training to help identify prior 
art, and seeking USPTO’s views on practices that extend market exclusivities, whether pharmaceutical patent examiners need 
additional resources, and the effect of post-grant challenges at the Patent Trial and Appeal Board on drug patents. The USPTO 
responded in July 2022 with a letter to the FDA stating that it is prepared to create formal mechanisms to collaborate with the 
FDA  on  patent  issues  that  may  affect  the  timing  of  generic  and  biosimilar  entry.  In  January  2023,  the  USPTO  held  a  joint 
listening session with the FDA on USPTO-FDA collaboration efforts.

Upon  the  expiration  or  loss  of  patent  protection  and/or  applicable  exclusivity  for  one  of  our  products,  we  can  lose  the 
majority  of  revenues  for  that  product  in  a  very  short  period  of  time.  See  Item  1.  Business—Marketing,  Distribution  and 
Selected Marketed Products—Competition. Additionally, if one of our products is the subject of an FDA Written Request for 
pediatric studies and we are unable to adequately complete these studies, we may not obtain the pediatric exclusivity award that 
extends unexpired regulatory exclusivity for the product (and existing patents for a small molecule product) by an additional six 
months.  Further,  in  2023,  FDA  draft  guidance  contemplates  that  the  agency  may  no  longer  grant  pediatric  exclusivity  for 
studies conducted solely to fulfill Pediatric Research Equity Act (PREA) requirements.

While we are unable to predict the precise effects of biosimilars and generics on our products, we are currently facing and 
expect to face greater competition in the United States, Europe and elsewhere as a result of biosimilar and generic competition 
and,  in  turn,  downward  pressure  on  our  product  prices  and  sales.  This  competition  has  had,  and  could  increasingly  have,  a 
material  adverse  effect  on  our  product  sales,  business  and  results  of  operations.  State  laws  may  also  have  an  impact  on  our 
business.  For  example,  California  is  the  first  state  to  have  passed  legislation,  effective  on  January  1,  2020,  against  “pay  for 
delay” settlements of patent infringement claims filed by manufacturers of generics or biosimilars where anything of value is 
given in exchange for settlement. Under this law, such settlement agreements are presumptively anticompetitive. The law may 
result in prolonged litigation and fewer settlements. Similar legislation based on California’s law continues to be introduced in 
other  states,  including  Connecticut  and  New  York.  Efforts  to  target  such  settlements  are  also  active  at  the  federal  level, 
including  legislation  introduced  such  as  the  Preserving  Access  to  Affordable  Generics  and  Biosimilars  Act  that  adopts 
California’s anticompetitive presumption approach.

Concentration  of  sales  at  certain  of  our  wholesaler  distributors,  and  consolidation  of  private  payers,  such  as  insurers, 

and PBMs has negatively affected, and may continue to negatively affect, our business.

Certain of our distributors, customers and payers have substantial purchasing leverage, due to the volume of our products 
they purchase or the number of patient lives for which they provide coverage. The substantial majority of our U.S. product sales 
is  made  to  three  pharmaceutical  product  wholesaler  distributors:  McKesson  Corporation,  Cencora,  Inc.  (formerly 
AmerisourceBergen  Corporation)  and  Cardinal  Health,  Inc.  These  distributors,  in  turn,  sell  our  products  to  their  customers, 
which  include  physicians  or  their  clinics,  dialysis  centers,  hospitals  and  pharmacies.  Similarly,  as  discussed  above,  there  has 
been  significant  consolidation  in  the  health  insurance  industry,  including  that  a  small  number  of  PBMs  now  oversee  a 

42

substantial percentage of total covered lives in the United States. See Our sales depend on coverage and reimbursement from 
government  and  commercial  third-party  payers,  and  pricing  and  reimbursement  pressures  have  affected,  and  are  likely  to 
continue  to  affect,  our  profitability.  For  example,  the  five  largest  PBMs  in  the  United  States  are  now  part  of  major  health 
insurance providers, and nationally account for 92% of prescription drug claims. The growing concentration of purchasing and 
negotiating power by these entities has, and may continue to, put pressure on our pricing due to their ability to extract price 
discounts  on  our  products,  fees  for  other  services  or  rebates,  negatively  affecting  our  bargaining  position,  sales  and/or  profit 
margins.  In  addition,  decisions  by  these  entities  to  purchase  or  cover  less  or  none  of  our  products  in  favor  of  competing 
products could have a material adverse effect on our product sales, business and results of operations due to their purchasing 
volume. Further, if one of our significant wholesale distributors encounters financial or other difficulties and becomes unable or 
unwilling to pay us all amounts that such distributor owes us on a timely basis, or at all, it could negatively affect our business 
and results of operations. In addition, if one of our significant wholesale distributors becomes insolvent or otherwise unable to 
continue its commercial relationship with us in its present form, it could significantly disrupt our business and adversely affect 
our product sales, our business and results of operations unless suitable alternatives are timely found or lost sales are absorbed 
by another distributor.

RISKS RELATED TO RESEARCH AND DEVELOPMENT

We may not be able to develop commercial products despite significant investments in R&D.

Amgen invests heavily in R&D. Successful product development in the biotechnology industry is highly uncertain, and 
very  few  R&D  projects  yield  approved  and  commercially  viable  products.  Product  candidates,  including  biosimilar  product 
candidates, or new indications for existing products (collectively, product candidates) that appear promising in the early phases 
of development have failed to reach the market for a number of reasons, such as:

•

•

•

•

•

•

•

•

•

the product candidate did not demonstrate acceptable clinical trial results even though it achieved its primary endpoints 
and/or  demonstrated  positive  preclinical  or  early  clinical  trial  results,  for  reasons  that  could  include  changes  in  the 
standard of care of medicine or expectations of health authorities;

the product candidate was not effective or not more effective than currently available or potentially competitive therapies 
in treating a specified condition or illness;

the product candidate was not cost effective in light of existing or potentially competitive therapeutics;

the product candidate had harmful side effects in animals or humans;

the necessary regulatory bodies, such as the FDA or EMA, did not approve the product candidate for an intended use;

reimbursement for the product candidate is limited despite regulatory approval;

the product candidate was not economical for us to manufacture and commercialize;

the patient population size is smaller than anticipated;

other parties had or may have had proprietary rights relating to our product candidate, such as patent rights, and did not let 
us sell it on reasonable terms, or at all;

• we  and  certain  of  our  licensees,  partners,  contracted  organizations  or  independent  investigators  failed  to  effectively 

conduct clinical development or clinical manufacturing activities; 

•

•

•

the pathway to regulatory approval or reimbursement for product candidates was uncertain or not well-defined;

the biosimilar product candidate failed to demonstrate the requisite biosimilarity to the applicable reference product, or 
was otherwise determined by a regulatory authority to not meet applicable standards for approval; and

a  companion  diagnostic  device  that  is  required  with  the  use  of  a  product  candidate  is  not  approved  by  the  necessary 
regulatory authority.

We  believe  that  genetics,  together  with  the  benefit  of  artificial  intelligence  and  computational  evidence,  could 
meaningfully aid our search for new medicines and help guide our R&D decisions and investments, and have focused our R&D 
strategy on drug targets validated by genetic or other compelling human evidence. We have invested considerable time, energy 
and  resources  into  developing  our  expertise  in  human  genetics,  acquiring  access  to  libraries  of  genetic  information,  and  are 
applying artificial intelligence to our R&D activities, including applying such technologies to advance our human data efforts 
and  our  generative  biology  platform  that  seek  to  discover  and  design  new  drugs.  However,  product  candidates  based  on 

43

genetically  validated  targets  or  developed  with  the  assistance  of  such  technologies  remain  subject  to  the  uncertainties  of  the 
drug development process and may not reach the market for a number of reasons, including the factors listed above. 

We must conduct clinical trials in humans before we commercialize and sell any of our product candidates or existing 

products for new indications.

Before  a  product  may  be  sold,  we  must  conduct  clinical  trials  to  demonstrate  that  our  product  candidates  are  safe  and 
effective  for  use  in  humans.  The  results  of  those  clinical  trials  are  used  as  the  basis  to  obtain  approval  from  regulatory 
authorities  such  as  the  FDA  and  EMA.  See  Our  current  products  and  products  in  development  cannot  be  sold  without 
regulatory approval. We are required to conduct clinical trials using an appropriate number of trial sites and patients to support 
the  product  label  claims.  The  length  of  time,  number  of  trial  sites  and  number  of  patients  required  for  clinical  trials  vary 
substantially, and we may spend several years and incur substantial expense in completing certain clinical trials. In addition, we 
may  have  difficulty  finding  a  sufficient  number  of  clinical  trial  sites  and/or  patients  to  participate  in  our  clinical  trials, 
particularly  if  competitors  are  conducting  clinical  trials  in  similar  patient  populations  and/or  in  rare  disease  therapy  clinical 
trials due to the inherently small patient population potentially served by such therapies. Patients may withdraw from clinical 
trials at any time (including trials in which patients believe that they may not be receiving a clinical benefit), and privacy laws 
and/or other restrictions in certain countries may restrict the ability of clinical trial investigators to conduct further follow-up on 
such patients, which may adversely affect the interpretation of study results. Delays and complications in planned clinical trials 
can  result  in  increased  development  costs,  associated  delays  in  regulatory  approvals  and  in  product  candidates  reaching  the 
market and revisions to existing product labels.

Further,  to  increase  the  number  of  patients  available  for  enrollment  in  our  clinical  trials,  we  have  opened,  and  will 
continue to open, clinical sites and enroll patients in a number of locations where our experience conducting clinical trials is 
more limited, including India, China, South Korea, the Philippines, Singapore and some Central and South American countries, 
either through utilization of third-party contract clinical trial providers entirely or in combination with local staff. Conducting 
clinical trials in locations where we have limited experience requires substantial time and resources to understand the unique 
regulatory environments of individual countries. For other examples of the risks of conducting clinical trials in China, see also 
Our sales and operations are subject to the risks of doing business internationally, including in emerging markets. Further, we 
must ensure the timely production, distribution and delivery of the clinical supply of our product candidates to numerous and 
varied  clinical  trial  sites.  Additionally,  regional  disruptions,  including  natural  and  man-made  disasters,  health  emergencies 
(such as novel viruses or pandemics, including the COVID-19 pandemic), or geopolitical conflicts (such as the ongoing armed 
conflicts  in  Ukraine  and  the  Middle  East)  have  significantly  disrupted  the  timing  of  clinical  trials,  and  in  the  future  could 
disrupt the timing, execution and outcome of clinical trials. If we fail to adequately manage the design, execution and diverse 
regulatory  aspects  of  our  clinical  trials  or  to  manage  the  production  or  distribution  of  our  clinical  supply,  or  such  sites 
experience  disruptions  as  a  result  of  a  natural/man-made  disaster,  health  emergency  or  geopolitical  conflict,  corresponding 
regulatory  approvals  may  be  delayed  or  we  may  fail  to  gain  approval  for  our  product  candidates  or  could  lose  our  ability  to 
market existing products in certain therapeutic areas or altogether. For example, our clinical trials were adversely affected by 
the COVID-19 pandemic. If we are unable to market and sell our products or product candidates or to obtain approvals in the 
timeframe needed to execute our product strategies, our business and results of operations could be materially and adversely 
affected.

We  rely  on  independent  third-party  clinical  investigators  to  recruit  patients  and  conduct  clinical  trials  on  our  behalf  in 
accordance  with  applicable  study  protocols,  laws  and  regulations.  Further,  we  rely  on  unaffiliated  third-party  vendors  to 
perform certain aspects of our clinical trial operations. In some circumstances, we enter into co-development arrangements with 
other pharmaceutical and medical devices companies that provide for the other company to conduct certain clinical trials for the 
product we are co-developing or to develop a diagnostic test used in screening or monitoring patients in our clinical trials. See 
Some of our pharmaceutical pipeline and our commercial product sales rely on collaborations with third parties, which may 
adversely affect the development and sales of our products. We also may acquire companies that have past or ongoing clinical 
trials or rights to products or product candidates for which clinical trials have been or are being conducted. These trials may not 
have been conducted to the same standards as ours; however, once an acquisition has been completed we assume responsibility 
for the conduct of these trials, including any potential risks and liabilities associated with the past and prospective conduct of 
those  trials.  If  regulatory  authorities  determine  that  we  or  others,  including  our  licensees  or  co-development  partners,  or  the 
independent investigators or vendors selected by us, our co-development partners or by a company we have acquired or from 
which we have acquired rights to a product or product candidate, have not complied with regulations applicable to the clinical 
trials,  those  authorities  may  refuse  or  reject  some  or  all  of  the  clinical  trial  data  or  take  other  actions  that  could  delay  or 
otherwise negatively affect our ability to obtain or maintain marketing approval of the product or indication. In addition, delays 
or failures to develop diagnostic tests for our clinical trials can affect the timely enrollment of such trials and lead to delays or 
inability to obtain marketing approval. If we were unable to market and sell our products or product candidates, our business 
and results of operations could be materially and adversely affected.

44

In  addition,  some  of  our  clinical  trials  utilize  drugs  and  combination  products  manufactured  and  marketed  by  other 
pharmaceutical companies or vendors. These drugs, devices and/or products may be administered or used in clinical trials in 
combination  with  one  of  our  products  or  product  candidates  or  in  a  head-to-head  study  comparing  the  products’  or  product 
candidates’ relative efficacy and safety. In the event that any of these vendors or pharmaceutical companies have unforeseen 
issues that negatively affect the quality of their work product or create a shortage of supply, or if we are otherwise unable to 
obtain  an  adequate  supply  of  these  other  drugs,  our  ability  to  complete  our  applicable  clinical  trials  and/or  evaluate  clinical 
results may also be negatively affected. As a result, such quality or supply problems could adversely affect our ability to timely 
file for, gain or maintain regulatory approvals worldwide.

Clinical  trials  must  generally  be  designed  based  on  the  current  standard  of  medical  care.  However,  in  certain  diseases, 
such as cancer, the standard of care is evolving rapidly. In some cases, we may design a clinical trial based on the standard of 
care we anticipate will exist at the time our study is completed. The duration of time needed to complete certain clinical trials 
may  result  in  the  design  of  such  clinical  trials  being  based  on  standards  of  medical  care  that  are  no  longer  or  that  have  not 
become  the  current  standards  by  the  time  such  trials  are  completed,  limiting  the  utility  and  application  of  such  trials. 
Additionally, the views of regulatory agencies relating to the requirements for accelerated approval may change over time, and 
trial designs that were sufficient to support accelerated approvals for some oncology products may not be considered sufficient 
for  later  candidates.  We  may  not  obtain  favorable  clinical  trial  results  and  therefore  may  not  be  able  to  obtain  regulatory 
approval  for  new  product  candidates  or  new  indications  for  existing  products  and/or  maintain  our  current  product  labels. 
Participants in clinical trials of our products and product candidates may also suffer adverse medical events or side effects that 
could, among other factors, delay or terminate clinical trial programs and/or require additional or longer trials to gain approval.

Even after a product is on the market, safety concerns may require additional or more extensive clinical trials as part of a 
risk management plan for our product or for approval of a new indication. Additional clinical trials we initiate, including those 
required by the FDA, could result in substantial additional expense, and the outcomes could result in further label restrictions or 
the loss of regulatory approval for an approved indication, each of which could have a material adverse effect on our product 
sales, business and results of operations. Additionally, any negative results from such trials could materially affect the extent of 
approvals, the use, reimbursement and sales of our products, our business and results of operations. 

Our current products and products in development cannot be sold without regulatory approval.

Our business is subject to extensive regulation by numerous state and federal government authorities in the United States, 
including the FDA, and by foreign regulatory authorities, including the EMA. We are required in the United States and in the 
other regions and countries in which we, or our partners and affiliates, sell to obtain approval from regulatory authorities before 
we manufacture, market and sell our products. Once our products are approved, the FDA and other U.S. and ex-U.S. regulatory 
agencies have substantial authority to require additional testing and reporting, perform inspections, change product labeling or 
mandate  withdrawals  of  our  products.  Failure  to  comply  with  applicable  regulatory  requirements  may  subject  us  to 
administrative and/or judicially imposed sanctions or monetary penalties as well as reputational and other harms. The sanctions 
could  include  the  FDA’s  or  ex-U.S.  regulatory  authorities’  refusals  to  approve  pending  applications,  delays  in  obtaining  or 
withdrawals  of  approvals,  delays  or  suspensions  of  clinical  trials,  warning  letters,  product  recalls  or  seizures,  total  or  partial 
suspensions of our operations, injunctions, fines, civil penalties and/or criminal prosecutions. 

Obtaining and maintaining regulatory approvals have been, and will continue to be, increasingly difficult, time-consuming 
and costly. Legislative bodies or regulatory agencies could enact new laws or regulations, change existing laws or regulations 
or change their interpretations of laws or regulations at any time, which could affect our ability to obtain or maintain approval 
of  our  products  or  product  candidates.  The  rate  and  degree  of  change  in  existing  laws  and  regulations  and  regulatory 
expectations have accelerated in established markets, and regulatory expectations continue to evolve in emerging markets. We 
are unable to predict whether and when any further changes to laws or regulatory policies affecting our business could occur, 
such  as  changes  to  laws  or  regulations  governing  manufacturer  communications  concerning  drug  products  and  drug  product 
candidates  and  whether  such  changes  could  have  a  material  adverse  effect  on  our  product  sales,  business  and  results  of 
operations. Further, we are reliant on regulators having the resources necessary to evaluate and approve our products. In the 
United States, a partial federal government shutdown halted the work of many federal agencies and their employees from late 
December  2018  through  late  January  2019.  A  subsequent  extended  shutdown  could  result  in  reductions  or  delays  of  FDA’s 
activities, including with respect to our ongoing clinical programs, our manufacturing of our products and product candidates 
and our product approvals.

45

Regulatory authorities have questioned, and may in the future question, the sufficiency for approval of the endpoints we 
select  for  our  clinical  trials.  A  number  of  our  products  and  product  candidates  have  been  evaluated  in  clinical  trials  using 
surrogate  endpoints  that  measure  an  effect  that  is  known  to  correlate  with  an  ultimate  clinical  benefit.  For  example,  a 
therapeutic oncology product candidate may be evaluated for its ability to reduce or eliminate minimal residual disease (MRD), 
or to extend the length of time during and after the treatment that a patient lives without the disease worsening, measured by 
progression-free  survival  (PFS).  Demonstrating  that  the  product  candidate  induces  MRD-negative  responses  or  produces  a 
statistically  significant  improvement  in  PFS  does  not  necessarily  mean  that  the  product  candidate  will  show  a  statistically 
significant improvement in overall survival or the time that the patients remain alive. In the cardiovascular (CV) setting, a heart 
disease therapeutic candidate may be evaluated for its ability to reduce LDL-C levels, as an elevated LDL-C level has been a 
surrogate endpoint for CV events such as death, heart attack and stroke. The use of surrogate endpoints such as PFS and LDL-C 
reduction, in the absence of other measures of clinical benefit, may not be sufficient for broad usage or approval even when 
such  results  are  statistically  significant.  Regulatory  authorities  could  also  add  new  requirements,  such  as  the  completion  of 
enrollment in a confirmatory study or the completion of an outcomes study or a meaningful portion of an outcomes study, as 
conditions for obtaining approval or obtaining an indication. For example, despite demonstrating that Repatha reduced LDL-C 
levels in a broad patient population, only after our large phase 3 outcomes study evaluating the ability of Repatha to prevent CV 
events  met  certain  of  its  primary  composite  endpoint  and  key  secondary  composite  endpoint  did  the  FDA  grant  a  broader 
approval of Repatha to reduce the risk of certain CV events. There may also be situations in which demonstrating the efficacy 
and safety of a product candidate may not be sufficient to gain regulatory approval unless superiority to other existing treatment 
options can be shown. The imposition of additional requirements or our inability to meet them in a timely fashion, or at all, has 
delayed, and may in the future delay, our clinical development and regulatory filing efforts, delay or prevent us from obtaining 
regulatory approval for new product candidates or new indications for existing products, or prevent us from maintaining our 
current product labels.

Some  of  our  products  have  been  approved  by  U.S.  and  ex-U.S.  regulatory  authorities  on  an  accelerated  or  conditional 
basis  with  full  approval  conditioned  upon  fulfilling  the  requirements  of  regulators.  For  example,  the  FDA  has  approved 
LUMAKRAS  under  accelerated  approval  for  the  treatment  of  adult  patients  with  KRAS  G12C-mutated  local  advanced  or 
metastatic NSCLC. Following our submission of the LUMAKRAS/LUMYKRAS CodeBreaK 200 Phase 3 confirmatory data 
submission  in  March  2023  to  the  FDA  and  EMA,  we  received  a  Complete  Response  Letter  from  the  FDA  and  a  new  post-
marketing requirement for an additional confirmatory study to support full approval. Regulatory authorities are placing greater 
focus on whether the sponsors of products originally approved on an accelerated or conditional basis have met the conditions of 
the  accelerated  or  conditional  approvals.  If  we  are  unable  to  fulfill  the  regulators’  requirements  that  were  conditions  of  a 
product’s accelerated or conditional approval and/or if regulators reevaluate the data or risk-benefit profile of our product, the 
conditional approval may not result in full approval or may be revoked or not renewed. Alternatively, we may be required to 
change the product’s labeled indications, conduct an additional confirmatory clinical trial, or even withdraw the product from 
the market. 

Regulatory authorities can also impose post-marketing pediatric study requirements. Failure to fulfill such requirements 
may  result  in  regulatory  or  enforcement  action,  including  financial  penalties  or  the  invalidation  of  a  product’s  marketing 
authorization.

Safety  problems  or  signals  can  arise  as  our  products  and  product  candidates  are  evaluated  in  clinical  trials,  including 
investigator sponsored studies, or as our marketed products are used in clinical practice. We are required continuously to collect 
and  assess  adverse  events  reported  to  us  and  to  communicate  to  regulatory  agencies  these  adverse  events  and  safety  signals 
regarding  our  products.  Regulatory  agencies  periodically  perform  inspections  of  our  pharmacovigilance  processes,  including 
our  adverse  event  reporting.  In  the  United  States,  for  our  products  with  approved  Risk  Evaluation  and  Mitigation  Strategies 
(REMS,  see  Part  I,  Item  1.  Business—Government  Regulation—Postapproval  Phase),  we  are  required  to  submit  periodic 
assessment reports to the FDA to demonstrate that the goals of the REMS are being met. REMS and other risk management 
programs are designed to help ensure that a drug’s benefits outweigh the risks and vary in the elements they contain. If the FDA 
is not satisfied with the results of the periodic assessment reports we submit for any of our REMS, the FDA may also modify 
our  REMS  or  take  other  regulatory  actions,  such  as  implementing  revised  or  restrictive  labeling.  The  drug  delivery  devices 
approved  for  use  in  combination  with  our  products  are  also  subject  to  regulatory  oversight  and  review  for  safety  and 
malfunctions.  See  Some  of  our  products  are  used  with  drug  delivery  or  companion  diagnostic  devices  that  have  their  own 
regulatory, manufacturing and other risks. If regulatory agencies determine that we or other parties (including our clinical trial 
investigators, those operating our patient support programs or licensees of our products) have not complied with the applicable 
reporting,  other  pharmacovigilance  or  other  safety  or  quality  assessment  requirements,  we  may  become  subject  to  additional 
inspections,  warning  letters  or  other  enforcement  actions,  including  fines,  marketing  authorization  withdrawal  and  other 
penalties.  Our  product  candidates  and  marketed  products  can  also  be  affected  by  safety  problems  or  signals  occurring  with 
respect  to  products  that  are  similar  to  ours  or  that  implicate  an  entire  class  of  products.  Further,  as  a  result  of  clinical  trials, 
including sub-analyses or meta-analyses of earlier clinical trials (a meta-analysis involves the use of various statistical methods 
to  combine  results  from  previous  separate  but  related  studies)  performed  by  us  or  others,  concerns  may  arise  about  the 

46

sufficiency of the data or studies underlying a product’s approved label. Such actual or perceived safety problems or concerns 
can lead to:

•

•

revised or restrictive labeling for our products, or the potential for restrictive labeling that has resulted, and may in the 
future result, in our decision not to commercialize a product candidate;

requirement of risk management or minimization activities or other regulatory agency compliance actions related to the 
promotion and sale of our products;

• post-marketing  commitments,  mandated  post-marketing  requirements  or  pharmacovigilance  programs  for  our  approved 

products;

• product recalls of our approved products;

•

•

•

•

required changes to the processes used in the manufacture of our products, which could increase our manufacturing costs 
and affect the availability of contract manufacturers we may utilize to assist in such manufacturing;

revocation of approval for our products from the market completely, or within particular therapeutic areas or patient types;

increased timelines or delays in being approved by the FDA or other regulatory bodies; and/or

treatments or product candidates not being approved by regulatory bodies.

For example, after an imbalance in positively adjudicated CV serious adverse events was observed in one of the phase 3 
clinical  trials  for  EVENITY  but  not  in  another,  larger  phase  3  study,  in  April  2019  the  FDA  approved  EVENITY  for  the 
treatment  of  osteoporosis  in  postmenopausal  women  at  high  risk  for  fracture,  along  with  a  post-marketing  requirement.  The 
requirement includes a five-year observational feasibility study that could be followed by a comparative safety study or trial.

In addition to our innovative products, we are working to develop and commercialize biosimilar versions of a number of 
products currently manufactured, marketed and sold by other pharmaceutical companies. In some markets outside the United 
States  and  EU,  there  is  not  yet  a  legislative  or  regulatory  pathway  for  the  approval  of  biosimilars.  In  the  United  States,  the 
BPCIA  provided  for  such  a  pathway.  Discussions  within  the  FDA  and  other  regulatory  authorities,  and  between  regulatory 
authorities  and  sponsors,  continue  as  to  the  evidence  needed  to  demonstrate  biosimilarity  or  interchangeability  for  specific 
products.  See  We  currently  face  competition  from  biosimilars  and  generics  and  expect  to  face  increasing  competition  from 
biosimilars  and  generics  in  the  future.  Delays  or  uncertainties  in  the  development  or  implementation  of  such  pathways,  or 
changes in existing regulatory pathways, including degradation of regulatory standards, could result in delays or difficulties in 
getting our biosimilar products approved by regulatory authorities, subject us to unanticipated development costs or otherwise 
reduce the value of the investments we have made in the biosimilars area. Further, we cannot predict the extent to which any 
potential  legislative  or  policy  initiatives  would  affect  the  biosimilar  pathway  or  have  a  material  adverse  effect  on  our 
development of biosimilars, on our marketed biosimilars or on our pursuit of interchangeability designations for any biosimilar. 
In addition, if we are unable to bring our biosimilar products to market on a timely basis and secure “first-to-market” or other 
advantageous  positions,  our  future  biosimilar  sales,  business  and  results  of  operations  could  be  materially  and  adversely 
affected.

Some  of  our  products  are  used  with  drug  delivery  or  companion  diagnostic  devices  that  have  their  own  regulatory, 

manufacturing and other risks.

Many of our products and product candidates may be used in combination with a drug delivery device, such as an injector 
or  other  delivery  system.  For  example,  Neulasta  is  available  as  part  of  the  Neulasta  Onpro  kit,  our  AutoTouch  reusable 
autoinjector  is  used  with  ENBREL  Mini  single-dose  prefilled  cartridges,  and  Repatha  can  be  administered  with  the  Repatha 
SureClick autoinjector or Pushtronex automated mini doser. In addition, some of our products or product candidates, including 
many of our oncology product candidates and products, including LUMAKRAS/LUMYKRAS and bemarituzumab, may also 
require the use of a companion or other diagnostic device such as a device that determines whether the patient is eligible to use 
our drug or that helps ensure its safe and effective use. In some regions, including the United States, regulatory authorities may 
require  contemporaneous  approval  of  the  companion  diagnostic  device  and  the  therapeutic  product;  in  others  the  regulatory 
authorities may require a separate study of the companion diagnostic device. Our product candidates or expanded indications of 
our products used with such devices may not be approved or may be substantially delayed in receiving regulatory approval if 
development or approval of such devices is delayed, such devices do not also gain or maintain regulatory approval or clearance, 
or  if  such  devices  do  not  remain  commercially  available.  When  approval  of  the  product  and  device  is  sought  under  a  single 
marketing  drug  application,  the  increased  complexity  of  the  review  process  may  delay  receipt  of  regulatory  approval.  In 
addition, some of these devices may be provided by single-source unaffiliated third-party companies. We are dependent on the 
sustained  cooperation  and  effort  of  those  third-party  companies  to  supply  and/or  market  the  devices  and,  in  some  cases,  to 
conduct the studies required for approval or clearance by the applicable regulatory agencies. We are also dependent on those 

47

third-party companies continuing to meet applicable regulatory or other requirements. Failure to successfully develop, modify, 
or supply the devices, delays in or failures of the Amgen or third-party studies, or failure of us or the third-party companies to 
obtain  or  maintain  regulatory  approval  or  clearance  of  the  devices  could  result  in  increased  development  costs;  delays  in,  or 
failure to obtain or maintain, regulatory approval; and/or associated delays in a product candidate reaching the market or in the 
addition of new indications for existing products. We are also required to collect and assess user complaints, adverse events and 
malfunctions regarding our devices, and actual or perceived safety problems or concerns with a device used with our product 
can  lead  to  regulatory  actions  and  adverse  effects  on  our  products.  See  Our  current  products  and  products  in  development 
cannot be sold without regulatory approval. Additionally, regulatory agencies conduct routine monitoring and inspections to 
identify and evaluate potential issues with our devices. For example, in 2017, the FDA reported on its adverse event reporting 
system  that  it  was  evaluating  our  Neulasta  Onpro  kit.  Subsequently,  we  implemented  device  and  labeling  enhancements  to 
address  product  complaints  received  on  this  device.  We  continuously  monitor  complaints  and  adverse  events  and  implement 
additional enhancements as needed. Loss of regulatory approval or clearance of a device that is used with our product may also 
result  in  the  removal  of  our  product  from  the  market.  Further,  failure  to  successfully  develop,  supply,  or  gain  or  maintain 
approval for these devices could adversely affect sales of the related approved products.

Some of our pharmaceutical pipeline and our commercial product sales rely on collaborations with third parties, which 

may adversely affect the development and sales of our products.

We  depend  on  alliances  with  other  companies,  including  pharmaceutical  and  biotechnology  companies,  vendors  and 
service providers, for the development of a portion of the products in our pharmaceutical pipeline and for the commercialization 
and sales of certain of our commercial products. For example, we have collaborations with third parties under which we share 
development  rights,  obligations  and  costs  and/or  commercial  rights  and  obligations.  See  Item  1.  Business—Business 
Relationships.

Failures  by  these  parties  to  meet  their  contractual,  regulatory,  or  other  obligations  to  us  or  any  disruption  in  the 
relationships  between  us  and  these  third  parties,  could  have  a  material  adverse  effect  on  our  pharmaceutical  pipeline  and 
business. In addition, our collaborative relationships for R&D and/or commercialization and sales often extend for many years 
and have given, and may in the future give, rise to disputes regarding the relative rights, obligations and revenues of us and our 
collaboration  partners,  including  the  ownership  or  prosecution  of  intellectual  property  and  associated  rights  and  obligations. 
This  could  result  in  the  loss  of  intellectual  property  rights  or  protection,  delay  the  development  and  sale  of  potential 
pharmaceutical  products,  affect  the  sale  and  delivery  of  our  commercialized  products  and  lead  to  lengthy  and  expensive 
litigation, administrative proceedings or arbitration. 

RISKS RELATED TO OPERATIONS

We  perform  a  substantial  majority  of  our  commercial  manufacturing  activities  at  our  facility  in  the  U.S.  territory  of 
Puerto Rico and a substantial majority of our clinical manufacturing activities at our facility in Thousand Oaks, California; 
significant disruptions or production failures at these facilities could significantly impair our ability to supply our products or 
continue our clinical trials.

The  global  supply  of  our  products  and  product  candidates  for  commercial  sales  and  for  use  in  our  clinical  trials  is 
significantly  dependent  on  the  uninterrupted  and  efficient  operation  of  our  manufacturing  facilities,  in  particular  those  in  the 
U.S. territory of Puerto Rico and Thousand Oaks, California. See Manufacturing difficulties, disruptions or delays could limit 
supply of our products and limit our product sales.

We  currently  perform  a  substantial  majority  of  our  clinical  manufacturing  that  supports  our  product  candidates  at  our 
facility  in  Thousand  Oaks,  California.  A  substantial  disruption  in  our  ability  to  operate  our  Thousand  Oaks  manufacturing 
facility could materially and adversely affect our ability to supply our product candidates for use in our clinical trials, leading to 
delays in development of our product candidates.

In addition, we currently perform a substantial majority of our commercial manufacturing activities at our facility in the 
U.S.  territory  of  Puerto  Rico.  In  recent  years,  Puerto  Rico  has  been  affected  by  a  number  of  natural  disasters,  including 
Hurricanes  Maria  (2017)  and  Fiona  (2022),  as  well  as  earthquakes  (2020).  These  natural  disasters  have  affected,  and  may 
continue  to  affect,  public  and  private  properties  and  Puerto  Rico’s  electric  grid  and  communications  networks.  While  the 
critical manufacturing areas of our commercial manufacturing facility were not significantly affected by these natural disasters, 
the restoration of electrical service on the island after Hurricane Maria was a slow process, and our facility relied on backup 
diesel  powered  generators  for  some  time.  We  also  operated  on  backup  generators  for  a  few  weeks  after  the  early  2020 
earthquakes  in  Puerto  Rico.  In  2021,  the  baseload  power  generation  units  of  the  Puerto  Rico  Electric  Power  Authority 
malfunctioned  due  to  the  lack  of  adequate  maintenance  for  over  a  decade,  leading  to  selective  outages  across  the  island.  In 
September  2022,  Hurricane  Fiona  caused  further  damage  to  the  island’s  utility  infrastructure  which  again  resulted  in 
widespread  power  outages  and  water  supply  issues.  Although  these  events  did  not  directly  have  a  material  effect  on  our 

48

business, they have resulted in disruptions to our third-party suppliers on the island. Further instability of the electric grid could 
require  us  to  increase  our  use  of  our  generators  or  to  use  them  exclusively.  In  addition,  future  storms,  earthquakes  or  other 
natural or man-made disasters or events (including political unrest or labor shortages) could have a more significant effect on 
our manufacturing operations. The COVID-19 pandemic also resulted in disruptions to activities on the island. In March 2020, 
the Governor of Puerto Rico issued Executive Orders requiring the lockdown of businesses and government facilities, imposing 
restrictions  on  business  operations  and  a  curfew  on  residents  in  response  to  COVID-19.  Additionally,  during  the  summer  of 
2021,  a  labor  dispute  arose  between  the  maritime  terminal  operation  company  and  its  employees,  represented  by  the 
International Longshoremen’s Association (ILA), which resulted in a strike that delayed cargo movement from the San Juan 
Port  Zone  for  several  days.  Hurricanes  Maria  and  Fiona,  the  2020  earthquakes,  the  COVID-19  pandemic  and  the  ILA  strike 
have  placed  greater  stress  on  the  island’s  already  challenged  economy.  Beginning  in  2016,  the  government  of  Puerto  Rico 
defaulted on its roughly $72 billion of debt. In response, the U.S. Congress passed the Puerto Rico Oversight, Management, and 
Economic  Stability  Act,  which  established  a  financial  oversight  board  for  Puerto  Rico.  After  years  of  negotiations  with 
bondholders and other creditors, this financial oversight board reached an agreement with the same, which was confirmed by 
the U.S. District Court for the District of Puerto Rico effective March 2022. Although our ability to manufacture and supply our 
products has not, to date, been significantly affected by natural disasters, unreliable electric utility services, strikes, pandemic 
lockdowns  or  the  island’s  economic  challenges,  these,  or  a  combination  of  these  challenges,  or  other  issues  that  create  a 
substantial disruption to our ability to operate our Puerto Rico manufacturing facility or get supplies and manufactured products 
transported  to  and  from  that  location,  could  make  it  more  expensive  or  difficult  for  us  to  operate  in  Puerto  Rico,  and  could 
materially and adversely affect our ability to supply our products and affect our product sales. See Manufacturing difficulties, 
disruptions or delays could limit supply of our products and limit our product sales.

We rely on third-party suppliers for certain of our raw materials, medical devices and components.

We rely on unaffiliated third-party suppliers for certain raw materials, medical devices and components necessary for the 
manufacturing of our commercial and clinical products. Certain of those raw materials, medical devices and components are 
proprietary products of those unaffiliated third-party suppliers and are specifically cited in our drug applications with regulatory 
agencies so that they must be obtained from that specific sole source or sources and could not be obtained from another supplier 
unless  and  until  the  regulatory  agency  approved  such  supplier.  For  example,  we  rely  on  a  single  source  for  the  SureClick 
autoinjectors used in the drug delivery of Repatha, ENBREL, Aimovig, AMJEVITA/AMGEVITA and Aranesp, and we also 
rely on a single source for the Pushtronex automated mini doser used in the drug delivery of Repatha. Also, certain of the raw 
materials  required  in  the  commercial  and  clinical  manufacturing  of  our  products  are  sourced  from  other  countries  and/or 
derived from biological sources, including mammalian tissues, bovine serum and human serum albumin.

Among the reasons we may be unable to obtain these raw materials, medical devices and components include:

•

•

•

•

•

•

•

•

•

•

regulatory requirements or action by regulatory agencies or others;

adverse financial or other strategic developments at or affecting the supplier, including bankruptcy;

unexpected demand for or shortage of raw materials, medical devices or components;

failure  to  comply  with  our  quality  standards  which  results  in  quality  and  product  failures,  complaints,  product 
contamination and/or recall;

a material shortage, contamination, recall and/or restrictions on the use of certain biologically derived substances or other 
raw materials;

discovery of previously unknown or undetected imperfections in raw materials, medical devices or components;

cyberattacks on supplier systems; 

natural or other disasters, including hurricanes, earthquakes, volcanoes or fires; 

labor disputes (such as strikes) or shortages, including from the effects of health emergencies (such as novel viruses or 
pandemics) or natural disasters; and

geopolitical conflicts (such as the ongoing conflicts in Ukraine and the Middle East).

For example, in prior years we have experienced shortages in certain components necessary for the formulation, fill and 
finish  of  certain  of  our  products  in  our  Puerto  Rico  facility,  and  we  have  also  experienced  shortages  related  to  single  use 
systems  and  packaging  which  has  caused  disruptions  to  our  manufacturing  plans.  Further  quality  issues  that  result  in 
unexpected  additional  demand  for  certain  components  have  resulted  in  shortages  and  in  the  future  may  lead  to  shortages  of 
required raw materials or components (such as we have experienced with EPOGEN glass vials). We may experience similar or 

49

other  shortages  in  the  future  resulting  in  delayed  shipments,  supply  constraints,  clinical  trial  delays,  contract  disputes  and/or 
stock-outs of our products. These or other similar events could negatively affect our ability to satisfy demand for our products 
or conduct clinical trials, which could have a material adverse effect on our product sales, business and results of operations.

Manufacturing difficulties, disruptions or delays could limit supply of our products and limit our product sales.

Manufacturing  biologic  and  small  molecule  human  therapeutic  products  is  difficult,  complex  and  highly  regulated.  We 
manufacture  many  of  our  commercial  products  and  product  candidates  internally.  In  addition,  we  use  third-party  contract 
manufacturers to produce, or assist in the production of, a number of our products, and we currently use contract manufacturers 
to produce, or assist in the production of, a number of our late-stage product candidates and drug delivery devices. The number 
of third-party contract manufacturers that we use has increased with our recent acquisition of Horizon, as Horizon required such 
contract  manufacturers  for  all  of  its  products.  See  Item  1.  Business—Manufacturing,  Distribution  and  Raw  Materials—
Manufacturing; see also Our efforts to collaborate with or acquire other companies, products, or technology, and to integrate 
the operations of companies or to support the products or technology we have acquired, may not be successful, and may result 
in  unanticipated  costs,  delays  or  failures  to  realize  the  benefits  of  the  transactions.  Our  ability  to  adequately  and  timely 
manufacture and supply our products (and product candidates to support our clinical trials) is dependent on the uninterrupted 
and efficient operation of our facilities and those of our third-party contract manufacturers, which may be affected by:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

capacity of manufacturing facilities;

contamination by microorganisms or viruses, or foreign particles from the manufacturing process;

natural or other disasters, including hurricanes, earthquakes, volcanoes or fires;

labor disputes or shortages, including the effects of health emergencies (such as novel viruses or pandemics) or natural 
disasters;

compliance with regulatory requirements;

changes in forecasts of future demand;

timing and actual number of production runs and production success rates and yields;

updates of manufacturing specifications;

contractual disputes with our suppliers and contract manufacturers;

timing and outcome of product quality testing;

power failures and/or other utility failures;

cyberattacks on supplier systems;

breakdown,  failure,  substandard  performance  or  improper  installation  or  operation  of  equipment  (including  our 
information technology systems and network-connected control systems or those of our contract manufacturers or third-
party service providers); 

delays in the ability of the FDA or foreign regulatory agencies to provide us necessary reviews, inspections and approvals, 
including as a result of a subsequent extended U.S. federal or other government shutdowns; and/or

geopolitical conflicts (such as the ongoing conflicts in Ukraine and the Middle East). 

If  any  of  these  or  other  problems  affect  production  in  one  or  more  of  our  facilities  or  those  of  our  third-party  contract 
manufacturers, or if we do not accurately forecast demand for our products or the amount of our product candidates required in 
clinical  trials,  we  may  be  unable  to  start  or  increase  production  in  our  unaffected  facilities  to  meet  demand.  If  the  efficient 
manufacture and supply of our products or product candidates is interrupted, we may experience delayed shipments, delays in 
our clinical trials, supply constraints, stock-outs, adverse event trends, contract disputes and/or recalls of our products. From 
time to time, we have initiated recalls of certain lots of our products. For example, in July 2014 we initiated a voluntary recall 
of an Aranesp lot distributed in the EU after particles were detected in a quality control sample following distribution of that 
lot, and in April 2018 we initiated a precautionary recall of two batches of Vectibix distributed in Switzerland after potential 
crimping  defects  were  discovered  in  the  metal  seals  on  some  product  vials.  If  we  are  at  any  time  unable  to  provide  an 
uninterrupted  supply  of  our  products  to  patients,  we  may  lose  patients  and  physicians  may  elect  to  prescribe  competing 
therapeutics instead of our products, which could have a material adverse effect on our product sales, business and results of 
operations.

50

Our  manufacturing  processes,  those  of  our  third-party  contract  manufacturers  and  those  of  certain  of  our  third-party 
service  providers  must  undergo  regulatory  approval  processes  and  are  subject  to  continued  review  by  the  FDA  and  other 
regulatory authorities. It can take longer than five years to build, validate and license another manufacturing plant, and it can 
take longer than three years to qualify and license a new contract manufacturer or service provider. If we elect or are required to 
make  changes  to  our  manufacturing  processes  because  of  new  regulatory  requirements,  new  interpretations  of  existing 
requirements  or  other  reasons,  this  could  increase  our  manufacturing  costs  and  result  in  delayed  shipments,  delays  in  our 
clinical  trials,  supply  constraints,  stock-outs,  adverse  event  trends  or  contract  negotiations  or  disputes.  Such  manufacturing 
challenges may also occur if our existing contract manufacturers are unable or unwilling to timely implement such changes, or 
at all.

In addition, regulatory agencies conduct routine monitoring and inspections of our manufacturing facilities and processes 
as well as those of our third-party contract manufacturers and service providers. If regulatory authorities determine that we or 
our  third-party  contract  manufacturers  or  certain  of  our  third-party  service  providers  have  violated  regulations,  they  may 
mandate corrective actions and/or issue warning letters, or even restrict, suspend or revoke our prior approvals, prohibiting us 
from manufacturing our products or conducting clinical trials or selling our marketed products until we or the affected third-
party  contract  manufacturers  or  third-party  service  providers  comply,  or  indefinitely.  See  also  Our  current  products  and 
products  in  development  cannot  be  sold  without  regulatory  approval.  Such  issues  may  also  delay  the  approval  of  product 
candidates we have submitted for regulatory review, even if such product candidates are not directly related to the products, 
devices  or  processes  at  issue  with  regulators.  Because  our  third-party  contract  manufacturers  and  certain  of  our  third-party 
service  providers  are  subject  to  the  FDA  and  foreign  regulatory  authorities,  alternative  qualified  third-party  contract 
manufacturers  and  third-party  service  providers  may  not  be  available  on  a  timely  basis,  or  at  all.  If  we  or  our  third-party 
contract manufacturers or third-party service providers cease or interrupt production or if our third-party contract manufacturers 
and  third-party  service  providers  fail  to  supply  materials,  products  or  services  to  us,  we  may  experience  delayed  shipments, 
delays  in  our  clinical  trials,  supply  constraints,  contract  disputes,  stock-outs  and/or  recalls  of  our  products.  Additionally,  we 
distribute a substantial volume of our commercial products through our primary distribution centers in Louisville, Kentucky for 
the United States and in Breda, Netherlands for Europe and much of the rest of the world. We also conduct most of the labeling 
and packaging of our products distributed in Europe and much of the rest of the world in Breda. Our ability to timely supply 
products  is  dependent  on  the  uninterrupted  and  efficient  operations  of  our  distribution  and  logistics  centers,  our  third-party 
logistics providers and our labeling and packaging facility in Breda. Further, we rely on commercial transportation, including 
air and sea freight, for the distribution of our products to our customers, which has been negatively affected by the COVID-19 
pandemic, labor unrest, natural disasters and geopolitical security threats.

There  have  also  been  legislative  and  administrative  proposals  seeking  to  incentivize  greater  drug  manufacturing  in  the 
United  States  with  the  stated  goal  of  improving  supply  reliability  in  the  United  States.  For  example,  on  August  6,  2020,  the 
previous  Administration  issued  an  Executive  Order  aimed  at  boosting  domestic  production  of  essential  medicines,  medical 
countermeasures, and critical inputs titled “Executive Order on Ensuring Essential Medicines, Medical Countermeasures, and 
Critical  Inputs  are  Made  in  the  United  States.”  Additionally,  one  legislative  proposal  would  have  prohibited  the  U.S. 
Department  of  Veterans  Affairs  from  purchasing  certain  drugs  that  have  active  pharmaceutical  ingredients  manufactured 
outside the United States. While we perform a substantial majority of our commercial manufacturing activities in the United 
States, including in the U.S. territory of Puerto Rico, and a substantial majority of our clinical manufacturing activities at our 
facility in Thousand Oaks, California, the passage of such legislation could result in foreign governments enacting retaliatory 
legislation or regulatory actions, which may have an adverse effect on our product sales, business and results of operations.

Our  business  and  operations  may  be  negatively  affected  by  the  failure,  or  perceived  failure,  of  achieving  our 

environmental, social and governance objectives.

We  continue  to  work  towards  operating  our  business  in  an  environmentally  responsible  and  socially  inclusive  manner. 
Stakeholders, including our investors and our employees, have increasingly focused on, and are expected to continue to focus 
on, our ESG practices. Policymakers, regulators and investors globally have increased their focus on ESG matters, resulting in 
rapidly  evolving  and  diverging  expectations  and  standards.  For  example,  California  recently  enacted  the  Climate  Corporate 
Data Accountability Act that requires, among other things, disclosure of greenhouse gas emissions. In contrast, in other states, 
there  are  a  growing  number  of  anti-ESG  initiatives  that  may  conflict  with  certain  of  our  stakeholders’  expectations.  For 
example,  11  states  have  enacted  laws  prohibiting  the  consideration  of  ESG  factors  in  connection  with  state  pension  asset 
investment decisions. If our ESG practices fail to meet our stakeholders’ expectations and standards, or if we fail to comply 
with ESG-related regulations across our global business, there could be a material adverse effect on our reputation, business 
and, ultimately, our stock price. 

Our ESG report is made available on our website and describes our current ESG goals and the progress we have made on 
the ESG issues that we believe our external and internal stakeholders consider to be important, based on surveys, interviews and 
certain  frameworks  for  corporate  responsibility.  Achieving  our  ESG  goals  requires  long-term  investments  and  broad, 

51

coordinated  activity,  and  we  may  be  required  to  incur  additional  costs  or  allocate  additional  resources  towards  monitoring, 
reporting and implementing our ESG programs. Further, we may fail to accurately assess our stakeholders’ ESG priorities and 
concerns, as such priorities and concerns have been rapidly changing. While we have achieved most of our goals set in prior 
years,  whether  we  can  achieve  our  current  and  future  ESG  goals  continues  to  be  uncertain  and  remains  subject  to  numerous 
risks, including evolving regulatory requirements and social expectations affecting ESG practices, our ability to recruit, develop 
and retain a diverse workforce, the availability of suppliers and collaboration partners that can meet our environmental goals, 
the effects of the organic growth of our business and potential acquisitions of other businesses on our ESG performance, and 
the availability and cost of technologies or resources, such as carbon credits, that support our goals. Any failure or perceived 
failure to meet our ESG program priorities could result in a material adverse effect on our reputation, business and stock price. 

The effects of global climate change and related natural disasters could negatively affect our business and operations.

Many of our operations and facilities, including those essential to our manufacturing, R&D and distribution activities, are 
in locations that are subject to natural disasters, including droughts, fires, extreme temperatures, hurricanes, tropical storms and/
or floods. For example, in 2017 Hurricane Maria caused catastrophic damage, compounded in 2022 by Hurricane Fiona, to the 
U.S. territory of Puerto Rico, where we perform a substantial majority of our commercial manufacturing activities. Although 
our site was well-protected and suffered minimal damage, there can be no assurances that we would have similar results in the 
face  of  future  natural  disasters.  The  severity  and  frequency  of  weather-related  natural  disasters  has  been  amplified,  and  is 
expected to continue to be amplified by, global climate change. Such natural disasters have caused, and in the future may cause, 
damage to and/or disrupt our operations, which may result in a material adverse effect on our product sales, business and results 
of operations. Our suppliers, vendors and business partners also face similar risks, and any disruption to their operations could 
have  an  adverse  effect  on  our  supply  and  manufacturing  chain.  Further,  many  of  our  key  facilities  are  located  on  islands, 
including Puerto Rico, Singapore and Ireland, which rely on essential port facilities that may be vulnerable to climate change-
related or other natural disasters. Although we have detailed business continuity plans in place and periodic assessments of our 
natural  disaster  risk,  any  natural  disaster  may  also  result  in  prolonged  interruption  to  our  critical  operational  and  business 
activities,  and  we  may  be  required  to  incur  significant  costs  to  remedy  the  effects  of  such  natural  disasters  and  fully  resume 
operations,  which  may  result  in  a  material  adverse  effect  on  our  product  sales,  business  and  results  of  operations.  See  We 
perform a substantial majority of our commercial manufacturing activities at our facility in the U.S. territory of Puerto Rico 
and  a  substantial  majority  of  our  clinical  manufacturing  activities  at  our  facility  in  Thousand  Oaks,  California;  significant 
disruptions or production failures at these facilities could significantly impair our ability to supply our products or continue 
our clinical trials and Manufacturing difficulties, disruptions or delays could limit supply of our products and limit our product 
sales.

GENERAL RISK FACTORS

Global economic conditions may negatively affect us and may magnify certain risks that affect our business.

Our  operations  and  performance  have  been,  and  may  continue  to  be,  affected  by  global  economic  conditions.  The 
economic downturn resulting from the COVID-19 pandemic precipitated a global recession, which was followed by high rates 
of inflation and actions taken by financial regulators to raise interest rates. Instability in the financial system, tighter lending 
standards and higher interest rates have added stress that may create additional vulnerabilities in the global economy, the effects 
of  which  may  be  of  an  extended  duration.  Additionally,  with  higher  interest  rates,  deficits,  and  other  fiscal  pressures, 
governments may be unable to sustain their previously high levels of fiscal spending. Further, in the United States, although 
Congress has approved stopgap measures to fund the government through early March, the federal government continues to be 
at  risk  of  a  shutdown  if  legislation  providing  funding  for  the  fiscal  year  is  not  passed  as  a  result  of  political  divisions  in 
Congress and an impasse on budgetary and spending matters. Consequently, these and other financial pressures have caused, 
and  may  continue  to  cause,  government  or  other  third-party  payers  to  more  aggressively  seek  cost  containment  measures  in 
healthcare and other settings. See Our sales depend on coverage and reimbursement from government and commercial third-
party payers, and pricing and reimbursement pressures have affected, and are likely to continue to affect, our profitability. As a 
result  of  global  economic  conditions,  some  third-party  payers  may  delay  or  be  unable  to  satisfy  their  reimbursement 
obligations. Job losses or other economic hardships (including inflation) may also affect patients’ ability to afford healthcare as 
a result of increased co-pay or deductible obligations, greater cost sensitivity to existing co-pay or deductible obligations, lost 
healthcare insurance coverage or for other reasons. We believe such conditions have led and could continue to lead to reduced 
demand for our products, which could have a material adverse effect on our product sales, business and results of operations. 
The current inflationary environment related to increased aggregate demand, supply chain constraints and the effects from the 
armed  conflict  in  Ukraine  (including  the  effects  of  the  sanctions  that  were  implemented  in  response  to  the  conflict  and  the 
resulting impacts on the commodity market and supply chains) and the Middle East have also increased our operating expenses 
and  may  continue  to  affect  our  operating  expenses.  Our  operational  costs,  including  the  cost  of  energy,  materials,  labor, 
distribution and our other operational and facilities costs are subject to market conditions and are being adversely affected by 
inflationary pressures. Economic conditions may also adversely affect the ability of our distributors, customers and suppliers to 

52

obtain the liquidity required to buy inventory or raw materials and to perform their obligations under agreements with us, which 
could  disrupt  our  operations.  Although  we  monitor  our  distributors’,  customers’  and  suppliers’  financial  condition  and  their 
liquidity to mitigate our business risks, some of our distributors, customers and suppliers may become insolvent, which could 
have  a  material  adverse  effect  on  our  product  sales,  business  and  results  of  operations.  A  significant  worsening  of  global 
economic conditions could precipitate or materially amplify the other risks described herein.

We  maintain  a  significant  portfolio  of  investments  disclosed  as  cash  equivalents  and  marketable  securities  on  our 
consolidated balance sheets. In recent years, the global COVID-19 pandemic and interest rate increases have led to disruption 
and volatility in the global capital markets. We have certain assets, including equity investments, that are exposed to market 
fluctuations  that  could,  in  a  sustained  or  recurrent  series  of  market  disruptions,  result  in  impairments.  The  value  of  our 
investments may also be adversely affected by interest rate fluctuations, inflation, downgrades in credit ratings, illiquidity in the 
capital  markets,  geopolitical  events  and  other  factors  that  may  result  in  other-than-temporary  declines  in  the  value  of  our 
investments. Any of those events could cause us to record impairment charges with respect to our investment portfolio or to 
realize  losses  on  sales  of  investments.  We  also  maintain  a  majority  of  our  cash  and  cash  equivalents  in  accounts  with  major 
multi-national  financial  institutions,  and  our  deposits  at  these  institutions  exceed  insured  limits.  Market  conditions  can 
adversely affect the viability of these institutions. In the event of failure of any of the financial institutions where we maintain 
our cash and cash equivalents, there can be no assurance that we would be able to access uninsured funds in a timely manner or 
at all. Inability to access, or a delay in accessing these funds, could adversely affect our business and financial position.

Our stock price is volatile.

Our stock price, like that of our peers in the biotechnology and pharmaceutical industries, is volatile. Our revenues and 
operating results may fluctuate from period to period for a number of reasons. Events such as a delay in product development, 
changes to our expectations or strategy or even a relatively small revenue shortfall may cause financial results for a period to be 
below  our  expectations  or  projections.  As  a  result,  our  revenues  and  operating  results  and,  in  turn,  our  stock  price  may  be 
subject to significant fluctuations. Announcements or discussions, including via social media channels, of possible restrictive 
actions by government or private payers that would negatively affect our business or industry if ultimately enacted or adopted 
may  also  cause  our  stock  price  to  fluctuate,  whether  or  not  such  restrictive  actions  ever  actually  occur.  Similarly,  actual  or 
perceived  safety  issues  with  our  products  or  similar  products  or  unexpected  clinical  trial  results  can  have  an  immediate  and 
rapid effect on our stock price, whether or not our operating results are materially affected.

53

Item 1B.

UNRESOLVED STAFF COMMENTS

None.

Item 1C.

CYBERSECURITY

Risk Management and Strategy

Amgen  has  a  multi-layered  and  iterative  approach  towards  assessing,  identifying,  managing  and  mitigating  risks  from 
cybersecurity threats. The Company’s Digital, Technology & Innovation (DTI) function is designed to support our productivity, 
innovation and outreach globally through the quality delivery of information systems, solutions and services for our business 
and  operations.  The  DTI  function  has  a  Cybersecurity  &  Digital  Trust  (CDT)  team  that  assesses  and  reduces  cybersecurity 
exposure,  including  by  providing  employees  with  training  and  resources  to  identify  potential  cybersecurity  threats  and 
implementing  information  technology  security  practices.  The  CDT  team  also  monitors  for  cybersecurity  threat  activity  and 
seeks  to  mitigate  the  impact  from  cybersecurity  incidents  by  deploying  information  security  engineers,  system  architects, 
analysts and cybersecurity specialists to provide monitoring, reporting and management of cybersecurity incidents.

To evaluate the progress of its activities, our DTI function uses various industry and regulatory frameworks as guides to 
assess the state of the Company’s cybersecurity program maturity and controls, including our organizational, people, physical 
and technological controls. The CDT team also conducts reviews and evaluations of our cybersecurity resilience program with 
Amgen’s Cybersecurity & Digital Trust Governance Council (which includes leaders from information security, compliance, 
regulatory affairs, manufacturing, audit, law and business development functions).

Our  cybersecurity  risk  management  program  is  considered  by  and  integrated  into  our  Company-wide  Enterprise  Risk 
Management program, and shares common methodologies, reporting channels and governance processes that apply across the 
Enterprise  Risk  Management  program  to  that  of  other  enterprise  level  risks  (such  as  product  development,  safety  and 
surveillance, financial and intellectual property risks). Regular evaluations are conducted of the greatest risks to our business 
and their underlying risk drivers as well as the associated mitigation activities, maturity and controls. This program is overseen 
by  our  Executive  Vice  President  and  Chief  Financial  Officer  and  guided  by  the  Enterprise  Risk  Council,  a  cross-functional 
group of the Company’s business leaders representing key business functions that is chaired by our Chief Audit Executive. The 
results of the enterprise risk evaluations and the status and operation of the Enterprise Risk Management program are presented 
to our Board of Directors, which oversees the Company’s enterprise-level risks.

Further,  our  corporate  audit  function  is  responsible  for  assessing  risk  and  testing  whether,  and  the  extent  to  which,  our 
information security policies and practices are being implemented effectively within our business and by third party providers. 
Findings  from  such  reports  and  related  corrective  action  plans  are  shared  with  our  CDT  team,  Company  leadership,  and  the 
Audit Committee and Corporate Responsibility and Compliance Committee (CRCC) of our Board of Directors.

In addition to leveraging the Company’s own information technology resources, our Incident Response and Cyber Threat 
Intelligence teams engage, as needed, third-party cybersecurity risk assessors and consultants to assist in recognizing threats, 
identifying  security  vulnerabilities,  and  evaluating  the  impact  of  cybersecurity  attacks  and  incidents  when  they  occur.  On  a 
biennial  basis,  our  DTI  organization  also  engages  external  third-party  experts  to  assess  the  Company’s  cybersecurity  control 
maturity across the organization and develops plans to address such experts’ recommendations.

Our  CDT  function  has  processes  to  oversee  and  identify  the  risks  of  cybersecurity  threats  associated  with  third-party 
service  providers  and  monitors  and  works  to  mitigate  the  impact  of  cybersecurity  incidents  encountered  by  our  third-party 
service providers. Upon becoming aware of cybersecurity incidents encountered by our third-party service providers, the CDT 
function’s  Incident  Response  and  Cyber  Threat  Intelligence  teams  are  deployed  to  evaluate  and  mitigate  the  impact  of  such 
incidents on our business.

Despite  our  layered  controls  and  cybersecurity  efforts,  the  Company  and  its  third-party  vendors  have  experienced 
cyberattacks  and  information  security  vulnerabilities,  and  while  such  incidents  have  not  had  a  material  adverse  effect  on  the 
Company, there can be no assurance that future cybersecurity attacks or incidents would not result in a material adverse effect 
on our business strategy, results of operations or financial condition. For examples of such matters and a discussion of the risks 
that  we  face,  see  Item  1A.  Risk  Factors—A  breakdown  of  our  information  technology  systems,  cyberattack  or  information 
security  breach  could  significantly  compromise  the  confidentiality,  integrity  and  availability  of  our  information  technology 
systems,  network-connected  control  systems  and/or  our  data,  interrupt  the  operation  of  our  business  and/or  affect  our 
reputation.  However,  we  have  not  identified  risk  from  known  cybersecurity  threats,  including  as  a  result  of  any  prior 
cybersecurity incidents, that have materially affected or are reasonably likely to materially affect us, including our operations, 
business strategy, results of operations or financial condition.

54

Governance

Our Board of Directors oversees an enterprise-wide approach to risk management, including risks related to information 
systems and cybersecurity, and each Board committee has primary risk oversight responsibilities aligned with its areas of focus. 
At each regular meeting of the Board, the Board receives and considers reports from each of its committees, and such reports 
provide  additional  detail  on  significant  risk  management  issues  as  appropriate,  including  cybersecurity.  The  CRCC  is  the 
committee that has primary oversight responsibility for the Company’s information systems and management of cybersecurity 
and  receives  reports  from  our  Senior  Vice  President  and  Chief  Information  Officer  (CIO)  and  Chief  Information  Security 
Officer  (CISO)  that  includes  reviews  of  our  information  systems  strategy,  technology  investments,  cybersecurity  risks  and 
incidents, and third-party risk management, as well as an annual evaluation of the Company’s cybersecurity status. The Board’s 
Audit Committee has oversight responsibility of our internal controls, assurances and financial risks. The Audit Committee is 
provided with copies of materials presented to our CRCC by our CIO and CISO and receives reports from our CIO regarding 
topics including integration or implementation of new financial systems and key controls and governance designed to address 
cybersecurity risks associated with the use of such new financial systems.

Our  management  team,  including  our  CIO  and  CISO,  supervises  efforts  to  prevent,  detect,  mitigate,  and  remediate 
cybersecurity  risks  and  incidents  through  various  means,  which  may  include  briefings  from  internal  information  security 
personnel; threat intelligence and other information obtained from governmental, public or private sources, including external 
consultants engaged by us; and alerts and reports produced by security tools deployed in the information systems environment.

Our  CISO,  who  heads  our  CDT  team  and  is  accountable  for  the  Company’s  cybersecurity  risk  management  program, 
joined the Company’s information systems organization in 2016, is a Certified Information Systems Security Professional and 
is certified in risk and information systems control. Previously, our CISO served in both leadership and operational positions as 
a  cybersecurity  professional  in  the  U.S.  government  and  was  a  cybersecurity  consultant,  providing  a  wide  range  of 
cybersecurity services to various U.S. government agencies and departments. Our DTI organization is led by, and our CISO is 
overseen by, our CIO, who has held roles of increasing responsibility within our information systems organization since 2001 
and has developed his knowledge and skills in the cybersecurity area over the course of his career in information systems. Our 
inaugural Executive Vice President and Chief Technology Officer (CTO), effective as of the end of 2023, oversees our CIO. 
Prior to the establishment of the CTO role, our CIO was overseen by our Executive Vice President and Chief Financial Officer.

As leaders of the DTI organization and CDT function, respectively, the Company’s CIO and CISO are informed about 
and  monitor  significant  cybersecurity  threats  and  incidents  through  the  Company’s  internal  cybersecurity  reporting  structure. 
Our CDT team is responsible for monitoring and detecting cybersecurity threats and incidents. Our CDT team, overseen by our 
CISO, is also responsible for the mitigation and remediation of cybersecurity incidents. When members of the CDT team detect 
a cybersecurity threat or incident or are made aware of a cybersecurity incident encountered by a third-party service provider, 
the discovery is communicated to the Incident Response team, which includes our CISO and other senior members of the CDT 
function. The Incident Response team evaluates the severity of the cybersecurity threat or incident and shares its findings with 
our CISO.

Our  CISO  and/or  his  senior  team  leaders,  in  addition  to  our  CIO  and  CTO,  also  provide  regular  reports  to  executives 
leading our finance, compliance, law and human resources functions on potentially significant cybersecurity incidents and the 
progress made towards mitigation and remediation of those incidents. These leaders oversee reporting to our CRCC and Audit 
Committee, and reporting of such cybersecurity incidents are included in the course of regular meetings of such committees. 
Additionally, in appropriate circumstances, reporting of potentially significant cybersecurity incidents are made directly to the 
leaders  of  our  CRCC  and  Audit  Committee  or  directly  to  the  Board  of  Directors  outside  of  their  regular  meeting  schedule. 
Further, in support of our internal controls, our CISO also reviews cybersecurity matters and trends with our accounting and 
law functions on a quarterly basis.

Information Systems Acquired from Horizon Therapeutics plc

On  October  6,  2023,  we  completed  our  acquisition  of  Horizon.  Horizon’s  legacy  information  systems  are  currently 
maintained  separately  from  Amgen’s  preexisting  information  system  infrastructure.  After  we  are  able  to  fully  evaluate 
Horizon’s legacy information systems, protocols and practices, we plan to operationally integrate the legacy Horizon systems 
into  our  own,  and  these  integrated  systems  will  then  be  subject  to  Amgen’s  cybersecurity  risk  management  structure  and 
strategy.  While  we  integrate  these  systems,  our  CISO  and  CDT  function  are  engaging  in  cybersecurity  risk  management 
activities,  and  any  cybersecurity  incidents  detected  on  the  legacy  Horizon  information  systems  are  assessed,  mitigated  and 
remediated by our CDT function’s Incident Response and Cyber Threat Intelligence teams and reported in accordance with the 
governance processes detailed above. See Item 1A. Risk Factors—Our efforts to collaborate with or acquire other companies, 
products,  or  technology,  and  to  integrate  the  operations  of  companies  or  to  support  the  products  or  technology  we  have 
acquired,  may  not  be  successful,  and  may  result  in  unanticipated  costs,  delays  or  failures  to  realize  the  benefits  of  the 
transactions  and  Item  1A.  Risk  Factors—A  breakdown  of  our  information  technology  systems,  cyberattack  or  information 

55

security  breach  could  significantly  compromise  the  confidentiality,  integrity  and  availability  of  our  information  technology 
systems,  network-connected  control  systems  and/or  our  data,  interrupt  the  operation  of  our  business  and/or  affect  our 
reputation.

Item 2.

PROPERTIES

As of December 31, 2023, we owned or leased approximately 160 properties, including properties acquired from Horizon 
in Deerfield, Illinois and Ireland. The locations and primary functions of significant properties are summarized in the following 
tables:

U.S. Location:

Manufacturing

Administrative

R&D

Sales & marketing

Warehouse

P

P

P

Thousand Oaks, CA*

San Francisco, CA

Deerfield, IL

Louisville, KY

Cambridge, MA

Juncos, Puerto Rico

West Greenwich, RI

Tampa, FL

Other U.S. cities

____________

* Corporate headquarters

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

Distribution 
center

P

P

P

ROW Location:

Manufacturing

Administrative

R&D

Sales & marketing

Warehouse

Distribution 
center

Brazil

Canada

China 

Denmark

France

Germany

Iceland

Ireland

Japan

Netherlands
Singapore

Switzerland

United Kingdom

Other countries

P

P
P

P

P

P

P

P

P

P

P
P

P
P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P
P

P
P

P

P

P

P

P

P
P

P

P

P

Excluded from the information above are (i) undeveloped land and leased properties that have been abandoned and (ii) 
certain buildings we still own but that are no longer used in our business. Additionally, in January 2024 our U.S. manufacturing 
facility in New Albany, Ohio received licensure from the FDA for commercial production, and our facility in Holly Springs, 
North Carolina is currently under construction. There are no material encumbrances on our owned properties.

We  believe  our  facilities  are  suitable  for  their  intended  uses  and,  in  conjunction  with  our  third-party  contract 
manufacturing  agreements,  provide  adequate  capacity  and  are  sufficient  to  meet  our  expected  needs.  See  Item  1A.  Risk 
Factors for a discussion of the factors that could adversely impact our manufacturing operations and the global supply of our 
products.

See Item 1. Business—Manufacturing, Distribution and Raw Materials.

56

Item 3.

LEGAL PROCEEDINGS

Certain  of  the  legal  proceedings  in  which  we  are  involved  are  discussed  in  Part  IV—Note  20,  Contingencies  and 

commitments, to the Consolidated Financial Statements and are hereby incorporated by reference.

Item 4.

MINE SAFETY DISCLOSURES

Not applicable.

57

PART II

Item 5.

MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND 
ISSUER PURCHASES OF EQUITY SECURITIES

Common stock

Our common stock trades on the NASDAQ Global Select Market under the symbol AMGN. As of February 9, 2024, there 

were approximately 4,614 holders of record of our common stock.

Performance graph

The following graph shows the value of an investment of $100 on December 31, 2018, in each of Amgen common stock, 
the Amex Biotech Index, the Amex Pharmaceutical Index and Standard & Poor’s 500 Index. All values assume reinvestment of 
the pretax value of dividends and are calculated as of December 31 of each year. The historical stock price performance of the 
Company’s common stock shown in the performance graph is not necessarily indicative of future stock price performance.

Amgen (AMGN)

Amex Biotech (BTK)

Amex Pharmaceutical (DRG)
Standard & Poor’s 500 (SPX)

12/31/2018

12/31/2019

12/31/2020

12/31/2021

12/31/2022

12/31/2023

$100.00

$100.00

$100.00

$100.00

$127.62

$120.43

$118.39

$131.48

$125.07

$136.78

$128.73

$155.65

$126.16

$131.96

$158.82

$200.29

$152.01

$126.68

$171.14

$163.90

$172.55

$130.31

$184.35

$207.07

58

Comparison of Five-Year Cumulative Total Return of a $100 Investment on December 31, 2018Amgen (AMGN)Amex Biotech (BTK)Amex Pharmaceutical (DRG)S&P 500 (SPX)201820192020202120222023$80$100$120$140$160$180$200$220$240The  material  in  the  above  performance  graph  is  not  soliciting  material,  is  not  deemed  filed  with  the  SEC  and  is  not 
incorporated by reference in any filing of the Company under the Securities Act or the Exchange Act, whether made on, before 
or after the date of this filing and irrespective of any general incorporation language in such filing.

Stock repurchase program

During the year ended December 31, 2023, we had one outstanding stock repurchase program, under which we had no 

repurchase activity.

October 1 - October 31

November 1 - November 30

December 1 - December 31

January 1 - December 31

Dividends

Total
number of
shares
purchased

Average
price paid
per share

Total number
of shares purchased 
as part of publicly
announced program

Maximum dollar
value that may
yet be purchased
under the program

— 

— 

— 

— 

— 

—  $  6,979,263,848 

—  $  6,979,263,848 

—  $  6,979,263,848 

— 

— 

For the years ended December 31, 2023 and 2022, we paid quarterly dividends. We expect to continue to pay quarterly 
dividends,  although  the  amount  and  timing  of  any  future  dividends  are  subject  to  approval  by  our  Board  of  Directors. 
Additional information required by this item is incorporated herein by reference to Part IV—Note 17, Stockholders’ equity, to 
the Consolidated Financial Statements.

Securities Authorized for Issuance Under Existing Equity Compensation Plans

Information  about  securities  authorized  for  issuance  under  existing  equity  compensation  plans  is  incorporated  by 

reference from Part III, Item 12—Securities Authorized for Issuance Under Existing Equity Compensation Plans.

Item 6.

RESERVED

59

 
 
 
 
 
 
 
 
 
 
Item 7.

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF 
OPERATIONS

The  following  MD&A  is  intended  to  assist  the  reader  in  understanding  Amgen’s  business.  MD&A  is  provided  as  a 
supplement  to,  and  should  be  read  in  conjunction  with,  our  consolidated  financial  statements  and  accompanying  notes.  Our 
results of operations discussed in MD&A are presented in conformity with GAAP. Amgen operates in one business segment: 
human therapeutics. Therefore, our results of operations are discussed on a consolidated basis.

Forward-looking statements

This  report  and  other  documents  we  file  with  the  SEC  contain  forward-looking  statements  that  are  based  on  current 
expectations,  estimates,  forecasts  and  projections  about  us,  our  future  performance,  our  business,  our  beliefs  and  our 
management’s assumptions. In addition, we, or others on our behalf, may make forward-looking statements in press releases, 
written statements or our communications and discussions with investors and analysts in the normal course of business through 
meetings,  webcasts,  phone  calls  and  conference  calls.  Such  words  as  “expect,”  “anticipate,”  “outlook,”  “could,”  “target,” 
“project,” “intend,” “plan,” “believe,” “seek,” “estimate,” “should,” “may,” “assume” and “continue” as well as variations of 
such  words  and  similar  expressions  are  intended  to  identify  such  forward-looking  statements.  These  statements  are  not 
guarantees of future performance and they involve certain risks, uncertainties and assumptions that are difficult to predict. We 
describe our respective risks, uncertainties and assumptions that could affect the outcome or results of operations in Part I, Item 
1A.  Risk  Factors.  We  have  based  our  forward-looking  statements  on  our  management’s  beliefs  and  assumptions  based  on 
information available to our management at the time the statements are made. We caution you that actual outcomes and results 
may differ materially from what is expressed, implied or forecasted by our forward-looking statements. Reference is made in 
particular  to  forward-looking  statements  regarding  product  sales,  regulatory  activities,  clinical  trial  results,  reimbursement, 
expenses,  EPS,  liquidity  and  capital  resources,  trends,  planned  dividends,  stock  repurchases,  collaborations  and  effects  of 
pandemics. Except as required under the federal securities laws and the rules and regulations of the SEC, we do not have any 
intention or obligation to update publicly any forward-looking statements after the distribution of this report, whether as a result 
of new information, future events, changes in assumptions or otherwise.

60

Overview 

Amgen Inc. (including its subsidiaries, referred to as “Amgen,” “the Company,” “we,” “our” or “us”) discovers, develops, 
manufactures and delivers innovative medicines to fight some of the world’s toughest diseases. Amgen focuses on areas of high 
unmet  medical  need  and  leverages  its  expertise  to  strive  for  solutions  that  dramatically  improve  people’s  lives,  while  also 
reducing the social and economic burden of disease. We helped launch the biotechnology industry more than 40 years ago and 
have grown to be one of the world’s leading independent biotechnology companies. Our robust pipeline includes potential first-
in-class medicines at all stages of development.

Our  principal  products  are  Prolia,  ENBREL,  Otezla,  XGEVA,  Repatha,  Nplate,  KYPROLIS,  Aranesp,  EVENITY, 
Vectibix, BLINCYTO, TEPEZZA and KRYSTEXXA. We also market a number of other products, including but not limited to 
Neulasta,  MVASI,  AMJEVITA/AMGEVITA,  TEZSPIRE,  Parsabiv,  Aimovig,  LUMAKRAS/LUMYKRAS,  EPOGEN, 
KANJINTI,  TAVNEOS,  RAVICTI,  UPLIZNA  and  PROCYSBI.  For  additional  information  about  our  products,  see  Part  I, 
Item 1. Business—Marketing, Distribution and Selected Marketed Products.

Our  strategy  includes  integrated  activities  intended  to  strengthen  our  competitive  position  in  the  industry.  In  2023,  we 
completed  our  acquisition  of  Horizon,  advanced  our  innovative  pipeline  and  generated  strong  volume  growth  across  our 
product  portfolio  and  regions.  We  accomplished  these  objectives  while  maintaining  a  strategic  and  disciplined  approach  to 
capital allocation.

Our  newly  established  rare  disease  therapeutic  area  is  designed  to  maximize  the  potential  of  medicines  acquired  in 
connection  with  our  Horizon  acquisition,  including  TEPEZZA  for  thyroid  eye  disease,  KRYSTEXXA  for  chronic  refractory 
gout  and  UPLIZNA  for  neuromyelitis  optica  spectrum  disorder,  as  well  as  TAVNEOS,  acquired  from  the  ChemoCentryx 
acquisition in 2022, for severe active ANCA-associated vasculitis.

We  are  advancing  our  pipeline  of  innovative  medicines,  including  initiating  and  completing  enrollment  of  our  Phase  2 
study  of  maridebart  cafraglutide  for  the  treatment  of  obesity;  announcing  results  from  our  Phase  2  study  of  tarlatamab  in 
patients  with  SCLC;  and  rapidly  enrolling  patients  in  Phase  2  and  Phase  3  studies  for  several  of  our  later-stage  clinical 
programs across our therapeutic areas. For more information on our pipeline, including programs acquired from our Horizon 
acquisition, see Part I, Item 1. Business—Research and Development and Selected Product Candidates.

Total  product  sales  increased  in  2023,  primarily  driven  by  volume  growth  for  certain  brands,  including  Repatha, 
TEZSPIRE,  EVENITY,  Prolia  and  BLINCYTO,  and  the  contribution  of  $954  million  in  product  sales  from  the  Horizon 
acquisition  during  the  period  from  the  acquisition  date  of  October  6,  2023  through  December  31,  2023,  partially  offset  by 
declines in net selling prices of certain products, including Neulasta, MVASI and ENBREL. 

Cash  flows  from  operating  activities  totaled  $8.5  billion,  which  supported  investment  in  our  business,  including  our 
Horizon acquisition, while returning capital to shareholders through the payment of cash dividends. For 2023, we increased our 
quarterly cash dividend by 10% to $2.13 per share of common stock. In December 2023, we declared a cash dividend of $2.25 
per share of common stock for the first quarter of 2024, an increase of 6% for this period, to be paid in March 2024.

Amgen’s  approach  to  and  investment  in  human  capital  resource  management  is  directed  at  attracting,  motivating, 
developing  and  retaining  talent  to  tackle  the  challenges  of  running  an  enterprise  focused  on  the  discovery,  development  and 
commercialization of innovative medicines. Our compensation, benefits and development programs are designed to encourage 
performance,  promote  accountability  and  adherence  to  Company  values,  and  align  with  the  interests  of  the  Company’s 
shareholders.  Further,  we  believe  that  a  diverse  and  inclusive  culture  fosters  innovation,  which  supports  our  ability  to  serve 
patients.  In  our  effort  to  attract  and  retain  the  best  talent,  we  seek  out  and  support  talent  across  the  globe,  including  in 
underrepresented populations, consistent with our commitment to equal opportunity. For further information on these and other 
efforts, see Part I, Item 1. Business—Human Capital Resources.

We have a long-standing ambition to be environmentally responsible, and we regularly set targets to challenge ourselves 
to  deliver  further  improvements.  We  achieved  our  targets  for  the  2013–2020  period  while  growing  revenues,  increasing 
production  capacity  and  expanding  to  approximately  100  countries  over  the  same  period.  To  continue  on  our  path  to  greater 
environmental sustainability, in January 2021 we announced a new set of long-term environmental targets to achieve by 2027, 
including  achieving  carbon  neutrality,  reducing  water  consumption  by  40%  and  reducing  waste  disposed  by  75%.(2)(3) 
Additionally, in 2022 we issued our first green bonds, which were used to finance eligible projects that met specified criteria to 
reduce our impact on the environment.

(2)        Represents reductions against established baselines, taking into account only verified reduction projects and does not take into account changes associated 
with contraction or expansion of the Company.
(3)     Carbon neutrality goal refers to Scope 1 and 2.

61

Our  long-term  success  depends,  to  a  great  extent,  on  our  ability  to  continue  to  discover,  develop  and  commercialize 
innovative products and acquire or collaborate on therapies currently in development by other companies. We must grow sales 
from  existing  and  new  products  to  achieve  revenue  growth  and  to  offset  revenue  losses  from  when  products  lose  their 
exclusivity  or  when  competing  products  are  launched.  Certain  of  our  products  face  increasing  pressure  from  competition, 
including biosimilars and generics. For additional information, including information on the expirations of patents for various 
products, see Part I, Item 1. Business—Marketing, Distribution and Selected Marketed Products—Patents, and Part I, Item 1. 
Business—Marketing, Distribution and Selected Marketed Products—Competition. We devote considerable resources to R&D 
activities,  but  successful  product  development  in  the  biotechnology  industry  is  highly  uncertain.  We  also  face  increasing 
regulatory scrutiny of safety and efficacy both before and after products launch.

Macroeconomic and other challenges

Uncertain  macroeconomic  conditions,  including  higher  inflation,  rising  interest  rates  and  instability  in  the  financial 
system, as well as rising healthcare costs continue to pose challenges to our business. Further, ongoing geopolitical conflicts 
continue to create additional uncertainty in global macroeconomic conditions. Additionally, with public and private healthcare-
provider focus, the industry continues to be subject to cost containment measures and significant pricing pressures, including 
net  price  declines.  Moreover,  legislation  enacted  to  reduce  healthcare  expenditures,  including  provisions  of  the  IRA,  have 
affected,  and  are  likely  to  continue  to  affect,  our  business.  Finally,  wholesale  and  end-user  buying  patterns  can  affect  our 
product sales. These buying patterns can cause fluctuations in quarterly product sales but have generally not been significant to 
date when comparing full-year product performance to the prior year. See Part I, Item 1. Business—Marketing, Distribution and 
Selected Marketed Products, and Part I, Item 1A. Risk Factors for further discussion of certain factors that could impact our 
future product sales.

Our product sales were affected by reduced demand as a result of the COVID-19 pandemic, and the cumulative decrease 
in  diagnoses  over  the  course  of  the  pandemic  suppressed  the  volume  of  new  patients  starting  treatment,  which  continues  to 
impact the business. Given the unpredictable nature of future virus surges, there could be similar intermittent disruptions in the 
future in physician–patient interactions.

With regard to our clinical trial activities, we are continuously monitoring the possible impacts from health-related events, 
including changes from new COVID-19 variants; we are working to mitigate effects on future study enrollment in our clinical 
trials; and we are evaluating the impact in all relevant countries. We remain focused on supporting our active clinical sites in 
their providing care for patients and in our providing investigational drug supply.

Selected Financial Information

The following is an overview of our results of operations (in millions, except percentages and per-share data):

Product sales:

U.S.

ROW

Total product sales

Other revenues

Total revenues

Operating expenses

Operating income

Net income

Diluted EPS

Diluted shares

Year ended 
December 31, 2023

Change

Year ended 
December 31, 2022

$ 

$ 

$ 

$ 

$ 

$ 

19,272 
7,638 
26,910 

1,280 

28,190 

20,293 

7,897 

6,717 

12.49 

538 

 9 % $ 
 8 %  
 9 %  

 (16) %  

 7 % $ 

 21 % $ 

 (17) % $ 

 3 % $ 

 3 % $ 

 (1) %  

17,743 
7,058 
24,801 

1,522 

26,323 

16,757 

9,566 

6,552 

12.11 

541 

In the following discussion of changes in product sales, any reference to volume growth or decline refers to changes in the 
purchases  of  our  products  by  healthcare  providers  (such  as  physicians  or  their  clinics),  dialysis  centers,  hospitals  and 
pharmacies. In addition, any reference to increases or decreases in inventory refers to changes in inventory held by wholesaler 
customers and end users (such as pharmacies).

Total  product  sales  increased  in  2023,  primarily  driven  by  volume  growth  for  certain  brands,  including  Repatha, 
TEZSPIRE,  EVENITY,  Prolia  and  BLINCYTO,  and  the  contribution  of  $954  million  in  product  sales  from  the  Horizon 

62

 
 
 
 
acquisition  during  the  period  from  the  acquisition  date  of  October  6,  2023  through  December  31,  2023,  partially  offset  by 
declines  in  net  selling  prices  of  certain  products,  including  Neulasta,  MVASI  and  ENBREL.  For  2024,  we  expect  that  net 
selling prices will continue to decline at a portfolio level driven by increased competition. Further, the first quarter of a year 
historically represents the lowest product sales quarter for the year, in part due to plan changes, insurance reverifications and 
higher co-pay expenses as U.S. patients work through deductibles, particularly for products acquired through pharmacy benefit 
programs.

The  impact  of  changes  to  foreign  currency  exchange  rates  will  be  partially  offset  by  corresponding  changes  in  our 
international  operating  expenses.  While  not  designed  to  completely  address  foreign  currency  changes,  our  hedging  activities 
also seek to offset, in part, such effects on our net income by hedging our net foreign currency exposure, primarily with respect 
to product sales denominated in euros.

Uncertain macroeconomic conditions, changes in the healthcare ecosystem and geopolitical conflicts have the potential to 
introduce  variability  into  product  sales.  For  example,  actions  by  governments  and  other  entities  to  curb  high  inflation, 
provisions of the IRA and growth in numbers of Medicaid enrollees and uninsured individuals may have a negative impact on 
product sales. Furthermore, our product sales were affected by reduced demand as a result of the COVID-19 pandemic, and the 
cumulative decrease in diagnoses over the course of the pandemic suppressed the volume of new patients starting treatment, 
which continues to impact the business. Given the unpredictable nature of future virus surges, there could be future intermittent 
disruptions in physician–patient interactions. See Risk Factors in Part I, Item 1A. of this Form 10-K.

Other revenues decreased for 2023, primarily due to lower revenue from our COVID-19 manufacturing collaboration.

Operating expenses increased for 2023, due to higher amortization and acquisition-related expenses incurred as a result of 
the Horizon acquisition, a net impairment charge resulting from the termination of AMG 340, higher profit share and royalty 
expense, changes in our product mix and higher spend in later-stage clinical programs and marketed products support, partially 
offset by a loss on the divestiture of Gensenta in 2022. See Part IV—Note 3, Acquisitions and divestitures; Note 13, Goodwill 
and other intangible assets; and Note 18, Fair value measurement, to the Consolidated Financial Statements.

63

Results of Operations

Product sales

Worldwide product sales were as follows (dollar amounts in millions): 

Prolia
ENBREL

Otezla

XGEVA

Repatha
Nplate

KYPROLIS

Aranesp
EVENITY

Vectibix

BLINCYTO
TEPEZZA(1)
KRYSTEXXA(1)
Other products(2)

Total product sales

Total U.S.

Total ROW

Total product sales

NM = not meaningful

____________

Year ended 
December 31, 
2023

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

$ 

$ 

$ 

$ 

4,048 

3,697 

2,188 

2,112 

1,635 

1,477 

1,403 

1,362 

1,160 

984 

861 

448 

272 

5,263 

26,910 

19,272 

7,638 

26,910 

 12 % $ 

 (10) %  

 (4) %  

 5 %  

 26 %  

 13 %  

 13 %  

 (4) %  

 47 %  

 10 %  

 48 %  

NM  

NM  

 1 %  

 9 % $ 

 9 % $ 

 8 %  

3,628 

4,117 

2,288 

2,014 

1,296 

1,307 

1,247 

1,421 

787 

893 

583 

— 

— 

5,220 

24,801 

17,743 

7,058 

 12 % $ 

 (8) %  

 2 %  

 — %  

 16 %  

 27 %  

 13 %  

 (4) %  

 48 %  

 2 %  

 24 %  

NM  

NM  

 (9) %  

 2 % $ 

 3 % $ 

 1 %  

3,248 

4,465 

2,249 

2,018 

1,117 

1,027 

1,108 

1,480 

530 

873 

472 

— 

— 

5,710 

24,297 

17,286 

7,011 

 9 % $ 

24,801 

 2 % $ 

24,297 

(1)  TEPEZZA and KRYSTEXXA were acquired from our Horizon acquisition on October 6, 2023, and include product sales from the acquisition date through 

December 31, 2023.

(2)  Consists of product sales of our non-principal products, as well as sales prior to the divestiture of our Bergamo and Gensenta subsidiaries in the second 

quarter of 2023 and fourth quarter of 2022, respectively.

Future  sales  of  our  products  will  depend  in  part  on  the  factors  discussed  in  the  Overview,  Part  I,  Item  1.  Business—
Marketing,  Distribution  and  Selected  Marketed  Products—Competition,  in  Part  I,  Item  1A.  Risk  Factors,  and  any  additional 
factors discussed in the individual product sections below. In addition, for a list of our products’ significant competitors, see 
Part I, Item 1. Business—Marketing, Distribution and Selected Marketed Products—Competition.

Prolia 

Total Prolia sales by geographic region were as follows (dollar amounts in millions):

Prolia — U.S.

Prolia — ROW

Total Prolia

Year ended 
December 31, 
2023

$ 

$ 

2,733 

1,315 

4,048 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 11 % $ 

 13 %  

 12 % $ 

2,465 

1,163 

3,628 

 15 % $ 

 6 %  

 12 % $ 

2,150 

1,098 

3,248 

The increase in global Prolia sales for 2023 was primarily driven by volume growth and higher net selling price.

The increase in global Prolia sales for 2022 was driven by volume growth and higher net selling price, partially offset by 

unfavorable changes to foreign currency exchange rates.

64

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For  a  discussion  of  ongoing  litigation  related  to  Prolia,  see  Part  IV—Note  20,  Contingencies  and  commitments,  to  the 

Consolidated Financial Statements.

ENBREL

Total ENBREL sales by geographic region were as follows (dollar amounts in millions):

ENBREL — U.S.

ENBREL — Canada

Total ENBREL

Year ended 
December 31, 
2023

$ 

$ 

3,650 

47 

3,697 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 (10) % $ 

4,044 

 (36) %  

73 

 (10) % $ 

4,117 

 (7) % $ 

 (35) %  

 (8) % $ 

4,352 

113 

4,465 

The decrease in ENBREL sales for 2023 was driven by lower net selling price, lower inventory and unfavorable changes 
to estimated sales deductions. For 2024, we expect ENBREL to follow the historical pattern of lower sales in the first quarter 
relative  to  subsequent  quarters  due  to  the  impact  of  benefit  plan  changes,  insurance  reverification  and  increased  co-pay 
expenses as U.S. patients work through deductibles. In addition, for 2024, we expect further declines in net selling price.

The  decrease  in  ENBREL  sales  for  2022  was  primarily  driven  by  unfavorable  changes  to  estimated  sales  deductions, 

lower volume and lower net selling price.

Otezla

Total Otezla sales by geographic region were as follows (dollar amounts in millions):

Otezla — U.S.

Otezla — ROW

Total Otezla

Year ended 
December 31, 
2023

$ 

$ 

1,777 

411 

2,188 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 (6) % $ 

 2 %  

 (4) % $ 

1,886 

402 

2,288 

 5 % $ 

 (10) %  

 2 % $ 

1,804 

445 

2,249 

The  decrease  in  global  Otezla  sales  for  2023  was  driven  by  lower  net  selling  price  and  inventory,  partially  offset  by 
volume  growth.  For  2024,  we  expect  Otezla  to  follow  the  historical  pattern  of  lower  sales  in  the  first  quarter  relative  to 
subsequent quarters due to the impact of benefit plan changes, insurance reverification and increased co-pay expenses as U.S. 
patients work through deductibles.

The increase in global Otezla sales for 2022 was primarily driven by volume growth, partially offset by lower net selling 

price. ROW Otezla sales for 2022 were impacted by unfavorable changes to foreign currency exchange rates.

XGEVA

Total XGEVA sales by geographic region were as follows (dollar amounts in millions):

XGEVA — U.S.

XGEVA — ROW

Total XGEVA

Year ended 
December 31, 
2023

$ 

$ 

1,527 

585 

2,112 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 3 % $ 

 10 %  

 5 % $ 

1,480 

534 

2,014 

 3 % $ 

 (9) %  

 — % $ 

1,434 

584 

2,018 

The increase in global XGEVA sales for 2023 was primarily driven by higher net selling price.

Global  XGEVA  sales  were  relatively  unchanged  for  2022  as  higher  net  selling  price  was  offset  by  lower  volume  as  a 

result of increased competition and unfavorable changes to foreign currency exchange rates.

For a discussion of ongoing litigation related to XGEVA, see Part IV—Note 20, Contingencies and commitments, to the 

Consolidated Financial Statements.

65

 
 
 
Repatha

Total Repatha sales by geographic region were as follows (dollar amounts in millions):

Repatha — U.S.
Repatha — ROW
Total Repatha

Year ended 
December 31, 
2023

$ 

$ 

793 

842 

1,635 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 30 % $ 

 22 %  

 26 % $ 

608 

688 

1,296 

 9 % $ 

 23 %  

 16 % $ 

557 

560 

1,117 

The increase in global Repatha sales for 2023 was driven by volume growth, partially offset by lower net selling price.

The increase in global Repatha sales for 2022 was driven by volume growth, partially offset by lower net selling price and 
unfavorable changes to foreign currency exchange rates. Volume benefited from contracting changes to support and improve 
Medicare Part D and commercial patient access and the inclusion of Repatha on China’s National Reimbursement Drug List as 
of January 1, 2022, both of which resulted in decreases to the net selling price in 2022.

For a discussion of ongoing litigation related to Repatha, see Part IV—Note 20, Contingencies and commitments, to the 

Consolidated Financial Statements.

Nplate

Total Nplate sales by geographic region were as follows (dollar amounts in millions):

Nplate — U.S.

Nplate — ROW

Total Nplate

Year ended 
December 31, 
2023

$ 

$ 

996 

481 

1,477 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 17 % $ 

 5 %  

848 

459 

 13 % $ 

1,307 

 50 % $ 

 — %  

 27 % $ 

566 

461 

1,027 

The increase in global Nplate sales for 2023 was primarily driven by volume growth, including U.S. government orders 

totaling $286 million.

The  increase  in  global  Nplate  sales  for  2022  was  driven  by  volume  growth,  including  a  U.S.  government  order  of 

$207 million.

KYPROLIS

Total KYPROLIS sales by geographic region were as follows (dollar amounts in millions):

KYPROLIS — U.S.

KYPROLIS — ROW

Total KYPROLIS

Year ended 
December 31, 
2023

$ 

$ 

921 

482 

1,403 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 8 % $ 

 21 %  

 13 % $ 

850 

397 

1,247 

 15 % $ 

 7 %  

736 

372 

 13 % $ 

1,108 

The increases in global KYPROLIS sales for 2023 and 2022 were driven by volume growth.

66

 
 
 
Aranesp

Total Aranesp sales by geographic region were as follows (dollar amounts in millions):

Aranesp — U.S.

Aranesp — ROW

Total Aranesp

Year ended 
December 31, 
2023

$ 

$ 

452 

910 

1,362 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 (13) % $ 

 1 %  

521 

900 

 (4) % $ 

1,421 

 (3) % $ 

 (5) %  

 (4) % $ 

537 

943 

1,480 

The decrease in global Aranesp sales for 2023 was driven by unfavorable changes to foreign currency exchange rates and 
lower net selling price. U.S. Aranesp sales for 2023 decreased due to lower unit demand as a result of independent and medium-
sized dialysis organizations transitioning from Aranesp to EPOGEN.

The decrease in global Aranesp sales for 2022 was driven by lower net selling price and unfavorable changes to foreign 

currency exchange rates, partially offset by favorable changes to estimated sales deductions and volume growth.

We expect Aranesp to continue to face competition from EPOGEN and its biosimilars, which will impact volume and net 

selling price in the future.

EVENITY

Total EVENITY sales by geographic region were as follows (dollar amounts in millions):

EVENITY — U.S.

EVENITY — ROW

Total EVENITY

Year ended 
December 31, 
2023

$ 

$ 

809 

351 

1,160 

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 52 % $ 

 38 %  

 47 % $ 

533 

254 

787 

 61 % $ 

 28 %  

 48 % $ 

331 

199 

530 

The increases in global EVENITY sales for 2023 and 2022 were driven by volume growth. 

Vectibix 

Total Vectibix sales by geographic region were as follows (dollar amounts in millions):

Vectibix — U.S.
Vectibix — ROW

Total Vectibix

Year ended 
December 31, 
2023

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

$ 

$ 

461 
523 

984 

 16 % $ 
 5 %  

 10 % $ 

396 
497 

893 

 14 % $ 
 (6) %  

 2 % $ 

347 
526 

873 

The increase in global Vectibix sales for 2023 was driven by volume growth.

The increase in global Vectibix sales for 2022 was driven by higher net selling price and volume growth, partially offset 

by unfavorable changes to foreign currency exchange rates.

BLINCYTO

Total BLINCYTO sales by geographic region were as follows (dollar amounts in millions):

BLINCYTO — U.S.

BLINCYTO — ROW

Total BLINCYTO

Year ended 
December 31, 
2023

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

$ 

$ 

566 

295 

861 

 68 % $ 

 19 %  

 48 % $ 

336 

247 

583 

 21 % $ 

 27 %  

 24 % $ 

278 

194 

472 

The increase in global BLINCYTO sales for 2023 was driven by volume growth.

67

 
 
 
 
The increase in global BLINCYTO sales for 2022 was driven by volume growth and higher net selling price.

Other products

Other product sales by geographic region were as follows (dollar amounts in millions):

Year ended 
December 31, 
2023

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

Neulasta — U.S.

Neulasta — ROW

MVASI — U.S.

MVASI — ROW

AMJEVITA — U.S.
AMGEVITA — ROW
TEZSPIRE — U.S.

Parsabiv — U.S.

Parsabiv— ROW

Aimovig — U.S.

Aimovig — ROW
LUMAKRAS — U.S.
LUMYKRAS — ROW
EPOGEN — U.S.

KANJINTI — U.S.

KANJINTI — ROW
TAVNEOS — U.S.(1)
TAVNEOS — ROW(1)
RAVICTI — U.S.(2)
RAVICTI — ROW(2)
UPLIZNA — U.S.(2)
UPLIZNA — ROW(2)
PROCYSBI — U.S.(2)
PROCYSBI — ROW(2)
Other — U.S.(3)
Other — ROW(3)

Total other product sales

Total U.S. — other products

Total ROW — other products

Total other product sales

NM = not meaningful

* Change in excess of 100%

____________

$ 

710 

138 

511 

289 

126 

500 

567 

228 

134 

303 

20 

197 

83 

226 

109 

50 

126 

8 

86

1 

60 

5 

49

1 

576 
160 

5,263 
3,874 

1,389 

5,263 

$ 
$ 

$ 

 (26) % $ 

 (17) %  

 (15) %  

 (3) %  

NM  

 9 %  

*  

 (10) %  

 4 %  

 (24) %  

 25 %  

 (11) %  

 32 %  

 (55) %  

 (58) %  

 (15) %  

*  

 60 %  

NM  

NM  

NM  

NM  

NM  

NM  

 47 %  
 (35) %  

 1 % $ 
 3 % $ 

 (4) %  

 1 % $ 

959 

167 

602 

299 

— 

460 

170 

253 

129 

398 

16 

222 

63 

506 

257 

59 

16 

5 

— 

— 

— 

— 

— 

— 

393 
246 

5,220 
3,776 

1,444 

5,220 

 (37) % $ 

1,514 

 (24) %  

 (27) %  

 (12) %  

NM  

 5 %  

NM  

 69 %  

 (1) %  

 27 %  

*  

*  

*  

 (3) %  

 (46) %  

 (37) %  

NM  

NM  

NM  

NM  

NM  

NM  

NM  

NM  

 27 %  
 (13) %  

 (9) % $ 
 (10) % $ 

 (5) %  

 (9) % $ 

220 

826 

340 

— 

439 

— 

150 

130 

313 

4 

82 

8 

521 

479 

93 

— 

— 

— 

— 

— 

— 

— 

— 

309 
282 

5,710 
4,194 

1,516 

5,710 

(1)  TAVNEOS was acquired from our ChemoCentryx acquisition on October 20, 2022.

(2)  RAVICTI, UPLIZNA and PROCYSBI were acquired from our Horizon acquisition on October 6, 2023, and include product sales from the acquisition date 

through December 31, 2023.

(3)  Consists  of  product  sales  from  (i)  AVSOLA,  RIABNI,  Corlanor,  NEUPOGEN,  IMLYGIC,  Sensipar/Mimpara  and  BEKEMV;  (ii)  ACTIMMUNE, 
RAYOS, BUPHENYL, PENNSAID, QUINSAIR and DUEXIS from our Horizon acquisition on October 6, 2023 through December 31, 2023; and (iii) 
sales prior to the divestiture of our Bergamo and Gensenta subsidiaries in the second quarter of 2023 and fourth quarter of 2022, respectively.

68

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating expenses

Operating expenses were as follows (dollar amounts in millions):

Cost of sales

% of product sales

% of total revenues

Year ended 
December 31, 
2023

$ 

8,451 

 31.4 %

 30.0 %

Change

Year ended 
December 31, 
2022

Change

Year ended 
December 31, 
2021

 32 % $ 

6,406 

 (1) % $ 

6,454 

 25.8 %

 24.3 %

 26.6 %

 24.8 %

Research and development

$ 

4,784 

 8 % $ 

4,434 

 (8) % $ 

4,819 

% of product sales

% of total revenues

Acquired in-process research and development $ 

% of product sales

% of total revenues

 17.8 %

 17.0 %

— 

 — %

 — %

NM $ 

 17.9 %

 16.8 %

— 

 — %

 — %

 19.8 %

 18.5 %

 (100) % $ 

1,505 

 6.2 %

 5.8 %

Selling, general and administrative

$ 

6,179 

 14 % $ 

5,414 

 1 % $ 

5,368 

% of product sales

% of total revenues

Other

Total operating expenses

NM = not meaningful

* Change in excess of 100%

Cost of sales

 23.0 %

 21.9 %

$ 

879 

$  20,293 

 21.8 %

 20.6 %

 22.1 %

 20.7 %

 75 % $ 

503 

 21 % $  16,757 

* $ 

194 

 (9) % $  18,340 

Cost  of  sales  increased  to  30.0%  of  total  revenues  for  2023,  driven  by  higher  amortization  expense  from  acquisition-
related  assets  primarily  associated  with  the  Horizon  acquisition,  higher  profit  share  and  royalty  expense  and  changes  in  our 
product mix, partially offset by the impact of the Puerto Rico tax law change. The 2022 Puerto Rico tax law change replaced an 
excise tax with an income tax beginning in 2023. See Part IV—Note 3, Acquisitions and divestitures, and Note 7, Income taxes, 
to the Consolidated Financial Statements.

Cost  of  sales  decreased  to  24.3%  of  total  revenues  for  2022,  driven  by  lower  COVID-19  antibody  shipments  and 

manufacturing costs, partially offset by changes in our product mix.

Research and development

The  Company  groups  all  of  its  R&D  activities  and  related  expenditures  into  three  categories:  (i)  research  and  early 

pipeline, (ii) later-stage clinical programs and (iii) marketed products. These categories are described below:

Category

Research and early pipeline 

Later-stage clinical programs

Marketed products

Description
R&D  expenses  incurred  in  activities  substantially  in  support  of  early  research 
through  the  completion  of  phase  1  clinical  trials,  including  drug  discovery, 
toxicology, pharmacokinetics and drug metabolism and process development

R&D  expenses  incurred  in  or  related  to  phase  2  and  phase  3  clinical  programs 
intended  to  result  in  registration  of  a  new  product  or  a  new  indication  for  an 
existing product primarily in the United States or the EU

R&D  expenses  incurred  in  support  of  the  Company’s  marketed  products  that  are 
authorized  to  be  sold  primarily  in  the  United  States  or  the  EU.  Includes  clinical 
trials  designed  to  gather  information  on  product  safety  (certain  of  which  may  be 
required by regulatory authorities) and their product characteristics after regulatory 
approval has been obtained, as well as the costs of obtaining regulatory approval of 
a product in a new market after approval in either the United States or the EU has 
been obtained

69

R&D expense by category was as follows (in millions):

Research and early pipeline

Later-stage clinical programs

Marketed products

Total R&D expense

Years ended December 31,

2023

2022

2021

$ 

$ 

1,584  $ 

1,611  $ 

1,898 

1,302 

1,627 

1,196 

4,784  $ 

4,434  $ 

1,670 

1,726 

1,423 

4,819 

The increase in R&D expense for 2023 was driven by higher spend in later-stage clinical programs and marketed products 

support, including spend from programs acquired from the Horizon acquisition.

The  decrease  in  R&D  expense  for  2022  was  driven  by  higher  business  development  activity  in  2021  included  in  later-
stage clinical programs and research and early pipeline and lower marketed products support, partially offset by higher later-
stage clinical programs support and research and early pipeline spend.

Acquired in-process research and development

The Acquired IPR&D expense in 2021 was related to the bemarituzumab program, which was acquired as part of the Five 

Prime acquisition in 2021. See Part IV—Note 3, Acquisitions and divestitures, to the Consolidated Financial Statements.

Selling, general and administrative

The increase in SG&A expense for 2023 was primarily driven by acquisition-related expenses, in addition to commercial 
and  general  and  administrative  expenses  related  to  the  Horizon  acquisition,  partially  offset  by  a  decline  in  spend  for  other 
marketed products. See Part IV—Note 3, Acquisitions and divestitures, to the Consolidated Financial Statements.

The increase in SG&A expense for 2022 was primarily driven by higher acquisition-related expenses.

Other

Other operating expenses for 2023 primarily consisted of a net impairment charge for AMG 340 and expenses related to 
our restructuring plan initiated in the first quarter of 2023. See Part IV—Note 2, Restructuring; Note 13, Goodwill and other 
intangible assets; and Note 18, Fair value measurement, to the Consolidated Financial Statements.

Other  operating  expenses  for  2022  primarily  consisted  of  a  loss  on  the  divestiture  of  Gensenta.  See  Part  IV—Note  3, 

Acquisitions and divestitures, to the Consolidated Financial Statements.

Other operating expenses for 2021 primarily consisted of expenses related to cost-savings initiatives and a legal judgment.

Nonoperating expenses/income and income taxes

Nonoperating expenses/income and income taxes were as follows (dollar amounts in millions):

Interest expense, net

Other income (expense), net

Provision for income taxes

Effective tax rate

Interest expense, net

Years ended December 31,

$ 

$ 

$ 

2023

$ 

$ 

$ 

(2,875) 

2,833 

1,138 

 14.5 %

2022

(1,406) 

(814) 

794 

 10.8 %

$ 

$ 

$ 

2021

(1,197) 

259 

808 

 12.1 %

The  increases  in  Interest  expense,  net,  in  2023  and  2022  over  the  respective  prior  years  was  primarily  due  to  higher 
overall debt outstanding and higher interest rates on debt. See Part IV—Note 16, Financing arrangements, to the Consolidated 
Financial Statements.

70

 
 
 
 
 
 
Other income (expense), net

During  the  first  quarter  of  2023,  we  changed  the  method  of  accounting  for  our  investment  in  BeiGene  from  the  equity 
method  to  recording  the  investment  at  fair  value,  with  changes  in  fair  value  recognized  in  earnings.  See  Part  IV—Note  10, 
Investments, to the Consolidated Financial Statements.

The change in Other income (expense), net, for 2023 was primarily due to gains recognized in connection with recording 
our BeiGene investment at fair value and an increase in interest income due to higher average cash balances and higher interest 
rates.

The change in Other income (expense), net, for 2022  was primarily due to higher losses recognized in connection with 
our BeiGene investment compared with 2021 and losses recognized on our investments in limited partnerships, publicly traded 
equity securities and other strategic investments.

Income taxes

The increase in our effective tax rate for 2023 compared with 2022 was primarily due to the 2022 Puerto Rico tax law 

change that replaced the excise tax with an income tax beginning in 2023.

The  decrease  in  our  effective  tax  rate  for  2022  compared  with  2021  was  primarily  due  to  the  nondeductible  IPR&D 
expense arising from the acquisition of Five Prime in the prior year, partially offset by a nondeductible loss on the divestiture of 
Gensenta in 2022 and net unfavorable items as compared to the prior year.

As  previously  reported,  the  OECD  reached  an  agreement  to  align  countries  on  a  minimum  corporate  tax  rate  and  an 
expansion  of  the  taxing  rights  of  market  countries.  Effective  January  1,  2024,  selected  individual  countries,  including  the 
United Kingdom and EU member countries, have enacted the global minimum tax agreement. Our legal entities that are doing 
business  in  the  countries  that  have  enacted  the  agreement  are  now  subject  to  a  15%  minimum  tax  rate  on  adjusted  financial 
statement income. Other countries, including the United States and the U.S. territory of Puerto Rico, have not yet enacted the 
OECD  agreement  and  implementation  remains  highly  uncertain.  The  continued  enactment  of  the  agreement,  either  by  all 
OECD participants or unilaterally by individual countries, could result in tax increases or double taxation in the United States or 
foreign jurisdictions. 

The U.S. Treasury released final foreign tax credit regulations in December 2021 that eliminated U.S. creditability of the 
Puerto Rico excise tax beginning in 2023. In response, on June 30, 2022, the U.S. territory of Puerto Rico enacted Act 52-2022, 
which provides for an alternative income tax rate on industrial development income that the U.S. Treasury confirmed will be 
creditable under federal law. As part of this new law, eligible businesses will be subject to incremental income and withholding 
taxes in lieu of payment of the Puerto Rico excise tax. In order to qualify for the alternative income tax, our current tax grant 
with the Puerto Rico government was amended in December 2022. We qualified for this alternative income tax beginning on 
January 1, 2023, and our tax expense increased. 

In  2017,  we  received  an  RAR  and  a  modified  RAR  from  the  IRS  for  the  years  2010–2012,  proposing  significant 
adjustments  that  primarily  relate  to  the  allocation  of  profits  between  certain  of  our  entities  in  the  United  States  and  the  U.S. 
territory  of  Puerto  Rico.  We  disagreed  with  the  proposed  adjustments  and  calculations  and  pursued  resolution  with  the  IRS 
appeals  office  but  were  unable  to  reach  resolution.  In  July  2021,  we  filed  a  petition  in  the  U.S.  Tax  Court  to  contest  two 
duplicate Statutory Notices of Deficiency (Notices) for the years 2010–2012 that we received in May and July 2021, which seek 
to  increase  our  U.S.  taxable  income  for  the  years  2010–2012  by  an  amount  that  would  result  in  additional  federal  tax  of 
approximately $3.6 billion plus interest. Any additional tax that could be imposed for the years 2010–2012 would be reduced 
by up to approximately $900 million of repatriation tax previously accrued on our foreign earnings.

In  2020,  we  received  an  RAR  and  a  modified  RAR  from  the  IRS  for  the  years  2013–2015,  also  proposing  significant 
adjustments  that  primarily  relate  to  the  allocation  of  profits  between  certain  of  our  entities  in  the  United  States  and  the  U.S. 
territory of Puerto Rico similar to those proposed for the years 2010–2012. We disagreed with the proposed adjustments and 
calculations and pursued resolution with the IRS appeals office but were unable to reach resolution. In July 2022, we filed a 
petition in the U.S. Tax Court to contest a Notice for the years 2013–2015 that we previously reported receiving in April 2022 
that seeks to increase our U.S. taxable income for the years 2013–2015 by an amount that would result in additional federal tax 
of  approximately  $5.1  billion,  plus  interest.  In  addition,  the  Notice  asserts  penalties  of  approximately  $2.0  billion.  Any 
additional  tax  that  could  be  imposed  for  the  years  2013–2015  would  be  reduced  by  up  to  approximately  $2.2  billion  of 
repatriation tax previously accrued on our foreign earnings. 

We firmly believe that the IRS positions set forth in the 2010–2012 and 2013–2015 Notices are without merit. We are 
contesting  the  2010–2012  and  2013–2015  Notices  through  the  judicial  process.  The  two  cases  were  consolidated  in  the  U.S. 

71

Tax Court on December 19, 2022. On February 10, 2023, the U.S. Tax Court entered an order setting a trial date of November 
4, 2024.

We  are  currently  under  examination  by  the  IRS  for  the  years  2016–2018  with  respect  to  issues  similar  to  those  for  the 

2010 through 2015 period. In addition, we are under examination by a number of state and foreign tax jurisdictions.

Final resolution of these complex matters is not likely within the next 12 months. We continue to believe our accrual for 
income tax liabilities is appropriate based on past experience, interpretations of tax law, application of the tax law to our facts 
and judgments about potential actions by tax authorities; however, due to the complexity of the provision for income taxes and 
uncertain resolution of these matters, the ultimate outcome of any tax matters may result in payments substantially greater than 
amounts accrued and could have a material adverse impact on our consolidated financial statements.

See Part I, Item 1A. Risk Factors—We could be subject to additional tax liabilities, including from an adverse outcome in 
our  ongoing  tax  dispute  with  the  IRS  and  other  tax  examinations,  enactment  of  the  OECD  minimum  corporate  tax  rate 
agreement and the adoption and interpretation of new tax legislation, and we anticipate additional tax liabilities from certain 
provisions of the 2017 Tax Act that will go into effect in 2026; such tax liabilities could adversely affect our profitability and 
results of operations; Part II, Item 7. Management’s Discussion and Analysis or Financial Condition and Results of Operations
—Critical Accounting Policies and Estimates, Income taxes; and Part IV—Note 7, Income taxes, to the Consolidated Financial 
Statements for further discussion.

Financial Condition, Liquidity and Capital Resources

Selected financial data was as follows (in millions):

Cash, cash equivalents and marketable securities

Total assets

Current portion of long-term debt

Long-term debt

Stockholders’ equity

Cash, cash equivalents and marketable securities

December 31,

2023

2022

$ 

$ 

$ 

$ 

$ 

10,944  $ 

97,154  $ 

1,443  $ 

63,170  $ 

6,232  $ 

9,305 

65,121 

1,591 

37,354 

3,661 

Our balance of cash, cash equivalents and marketable securities was $10.9 billion on December 31, 2023. The primary 
objective of our investment portfolio is to maintain safety of principal, prudent levels of liquidity and acceptable levels of risk. 
Our investment policy limits interest-bearing security investments to certain types of debt and money market instruments issued 
by institutions with primarily investment-grade credit ratings, and it places restrictions on maturities and concentration by asset 
class and issuer.

Capital allocation

Consistent  with  the  objective  to  optimize  our  capital  structure,  we  deploy  our  accumulated  cash  balances  in  a  strategic 
manner  and  consider  a  number  of  alternatives,  including  investments  in  innovation  both  internally  and  externally  (including 
investments  that  expand  our  portfolio  of  products  in  areas  of  therapeutic  interest),  capital  expenditures,  repayment  of  debt, 
payment of dividends and stock repurchases.

 We intend to continue investing in our business while reducing our debt and returning capital to stockholders through the 
payment of cash dividends and stock repurchases. This reflects our desire to optimize our cost of capital and our confidence in 
the future cash flows of our business. The timing and amount of future dividends and stock repurchases will vary based on a 
number of factors, including future capital requirements for strategic transactions, debt levels and debt service requirements, our 
credit  rating,  availability  of  financing  on  acceptable  terms,  changes  to  applicable  tax  laws  or  corporate  laws,  changes  to  our 
business model and periodic determination by our Board of Directors that cash dividends and/or stock repurchases are in the 
best  interests  of  stockholders  and  are  in  compliance  with  applicable  laws  and  the  Company’s  agreements.  In  addition,  the 
timing  and  amount  of  stock  repurchases  may  also  be  affected  by  our  overall  level  of  cash,  stock  price  and  blackout  periods, 
during which we are restricted from repurchasing stock. The manner of stock repurchases may include block purchases, tender 
offers, ASRs and market transactions.

The Board of Directors declared quarterly cash dividends of $2.13, $1.94 and $1.76 per share of common stock paid in 
2023, 2022 and 2021, respectively, an increase of 10% over the prior year in both 2023 and 2022. In December 2023, the Board 

72

of Directors declared a cash dividend of $2.25 per share of common stock for the first quarter of 2024, an increase of 6% for 
this period, to be paid in March 2024.

During  2023,  we  did  not  repurchase  any  of  our  common  stock.  During  2022,  we  repurchased  $6.3  billion  of  common 
stock, including $6.0 billion under ASR agreements and had cash settlements for stock repurchases of $6.4 billion. In 2021, we 
repurchased  and  had  cash  settlements  of  $5.0  billion  of  common  stock.  As  of  December  31,  2023,  $7.0  billion  remained 
available under the stock repurchase program.

As  a  result  of  stock  repurchases  and  quarterly  dividend  payments,  we  have  an  accumulated  deficit  as  of  December  31, 
2023 and 2022. Our accumulated deficit is not anticipated to affect our future ability to operate, repurchase stock, pay dividends 
or repay our debt given our expected continued profitability and strong financial position.

We  believe  that  existing  funds,  cash  generated  from  operations  and  existing  sources  of  and  access  to  financing  are 
adequate  to  satisfy  our  needs  for  working  capital,  capital  expenditure  and  debt  service  requirements  as  well  as  our  plans  to 
reduce  debt,  pay  dividends  and  repurchase  stock,  and  other  business  initiatives  we  plan  to  strategically  pursue,  including 
acquisitions and licensing activities. We anticipate that our liquidity needs can be met through a variety of sources, including 
cash provided by operating activities, sales of marketable securities, borrowings through commercial paper and/or syndicated 
credit facilities, and access to other domestic and foreign debt markets and equity markets. See Part I, Item 1A. Risk Factors—
Global economic conditions may negatively affect us and may magnify certain risks that affect our business.

Financing arrangements

To help meet our liquidity requirements, we have entered into various financing arrangements. The noncurrent portions of 
our long-term borrowings as of December 31, 2023 and 2022, were $63.2 billion and $37.4 billion, respectively. The carrying 
values  of  our  long-term  borrowings  are  net  of  fair  value  adjustments  for  interest  rate  swaps  and  unamortized  discounts, 
premiums  and  offering  costs.  As  of  December  31,  2023,  S&P,  Moody’s  and  Fitch  assigned  credit  ratings  to  our  outstanding 
senior  notes  of  BBB+,  Baa1  and  BBB,  respectively,  which  are  considered  investment  grade.  Unfavorable  changes  to  these 
ratings may have an adverse impact on future financings.

In December 2022, in connection with the acquisition of Horizon, we entered into a bridge credit agreement and a term 
loan credit agreement, which provided for borrowings in the aggregate of $28.5 billion. In March 2023, we issued $24.0 billion 
of debt composed of eight series of notes and terminated the bridge credit agreement. In October 2023, in connection with the 
completion of the acquisition of Horizon, we borrowed $4.0 billion under the term loan credit agreement.

During 2022 and 2021, we issued debt with aggregate principal amounts of $7.0 billion and $5.0 billion, respectively.

During  2023,  we  repurchased  portions  of  our  debt  at  an  aggregate  cost  of  $0.6  billion.  During  2022,  we  repurchased 

portions of our debt at a cost of $0.3 billion. During 2021, we repaid/redeemed debt of $4.2 billion.

To achieve a desired mix of fixed-rate and floating-rate debt, we entered into interest rate swap contracts that effectively 
converted a fixed-rate interest coupon for certain of our debt issuances to a floating, SOFR-based coupon over the lives of the 
respective notes. These interest rate swap contracts qualify and are designated as fair value hedges. As of both December 31, 
2023 and 2022, we had interest rate swap contracts with aggregate notional amount of $6.7 billion.

To hedge our exposure to foreign currency exchange rate risk associated with certain of our long-term notes denominated 
in  foreign  currencies,  we  entered  into  cross-currency  swap  contracts,  which  effectively  convert  the  interest  payments  and 
principal repayment of the respective notes from euros, pounds sterling and Swiss francs to U.S. dollars. These cross-currency 
swap contracts qualify and are designated as cash flow hedges. As of both December 31, 2023 and 2022, we had cross-currency 
swap contracts with aggregate notional amount of $2.7 billion and $3.4 billion, respectively.

As of December 31, 2023, we had a commercial paper program that allows us to issue up to $2.5 billion of unsecured 
commercial paper to fund our working-capital needs. During 2023, 2022 and 2021, we did not issue any commercial paper. No 
commercial paper was outstanding as of both December 31, 2023 and 2022.

73

In 2023, we amended and restated our syndicated, unsecured, revolving credit agreement, under which we may borrow up 
to  $4.0  billion  (increased  from  $2.5  billion  prior  to  the  amendment)  for  general  corporate  purposes,  including  as  a  liquidity 
backstop for our commercial paper program. The commitments under the revolving credit agreement may be increased by up to 
$1.25 billion with the agreement of the banks (increased from $750 million prior to the amendment). Each bank that is a party 
to the agreement has an initial commitment term of five years. This term may be extended for up to two additional one-year 
periods with the agreement of the banks. Annual commitment fees for this agreement are 0.09% of the unused portion of the 
facility  based  on  our  current  credit  rating.  Generally,  we  would  be  charged  interest  for  any  amounts  borrowed  under  this 
facility, based on our current credit rating, at (i) SOFR plus 1.01% or (ii) the highest of (A) the administrative agent bank base 
commercial lending rate, (B) the overnight federal funds rate plus 0.50% or (C) one-month SOFR plus 1.1%. As of December 
31, 2023 and 2022, no amounts were outstanding under this facility.

In February 2023, we filed a shelf registration statement with the SEC that allows us to issue unspecified amounts of debt 
securities; common stock; preferred stock; warrants to purchase debt securities, common stock, preferred stock or depositary 
shares;  rights  to  purchase  common  stock  or  preferred  stock;  securities  purchase  contracts;  securities  purchase  units;  and 
depositary shares. Under this shelf registration statement, all of the securities available for issuance may be offered from time to 
time, with terms to be determined at the time of issuance. This shelf registration statement expires in February 2026.

Certain  of  our  financing  arrangements  contain  nonfinancial  covenants.  In  addition,  our  revolving  credit  agreement  and 
term loan credit agreement include a financial covenant that requires us to maintain a specified minimum interest coverage ratio 
of  (i)  the  sum  of  consolidated  net  income,  interest  expense,  provision  for  income  taxes,  depreciation  expense,  amortization 
expense,  unusual  or  nonrecurring  charges  and  other  noncash  items  (consolidated  earnings  before  interest,  taxes,  depreciation 
and amortization) to (ii) Consolidated Interest Expense, each as defined and described in the respective agreements. We were in 
compliance with all applicable covenants under these arrangements as of December 31, 2023.

  These  financing  arrangements  are  more  fully  discussed  in  Part  IV—Note  16,  Financing  arrangements,  and  Note  19, 

Derivative instruments, to the Consolidated Financial Statements.

Cash flows

Our summarized cash flow activity was as follows (in millions):

Net cash provided by operating activities

Net cash (used in) provided by investing activities

Net cash provided by (used in) financing activities

Operating

Years ended December 31,

2023

2022

2021

$ 

$ 

$ 

8,471  $ 

(26,204)  $ 

21,048  $ 

9,721  $ 

(6,044)  $ 

(4,037)  $ 

9,261 

733 

(8,271) 

Cash provided by operating activities has been and is expected to continue to be our primary recurring source of funds. 
Cash  provided  by  operating  activities  decreased  in  2023  due  to  lower  net  income  adjusted  for  non-cash  items,  primarily 
transaction and integration payments made in connection with the Horizon acquisition, as well as higher tax payments, partially 
offset by changes in working capital items. Cash provided by operating activities increased in 2022 primarily due to the timing 
of  payments  for  sales  incentives  and  discounts,  vendor  purchases,  liabilities  to  tax  authorities  and  receipts  from  corporate 
partners, partially offset by higher manufacturing activities in the current year.

Investing

Cash  used  in  investing  activities  during  2023  was  primarily  due  to  $27.0  billion  of  net  cash  used  for  the  purchase  of 
Horizon, partially offset by net cash inflows related to marketable securities of $1.7 billion. Cash used in investing activities 
during  2022  was  primarily  due  to  our  $3.8  billion  purchase  of  ChemoCentryx  and  net  cash  outflows  related  to  marketable 
securities  of  $1.4  billion.  Cash  provided  by  investing  activities  during  2021  was  primarily  due  to  net  cash  inflows  related  to 
marketable securities of $4.3 billion, partially offset by cash used in the acquisitions of Teneobio and Five Prime of $2.5 billion. 
Capital  expenditures  were  $1.1  billion,  $936  million  and  $880  million  in  2023,  2022  and  2021,  respectively.  We  currently 
estimate 2024 spending on capital projects to be approximately $1.1 billion. A majority of the increase in expenditures relates to 
expansion of manufacturing capacity to enable supply of products and product candidates.

74

Financing

Cash provided by financing activities during 2023 was primarily due to net proceeds from long-term debt of $27.8 billion 
primarily  in  connection  with  the  acquisition  of  Horizon,  partially  offset  by  the  payment  of  dividends  of  $4.6  billion  and 
repayment/extinguishment of debt of $2.1 billion. Cash used in financing activities during 2022 was primarily due to payments 
to  repurchase  our  common  stock  of  $6.4  billion  and  dividends  paid  of  $4.2  billion,  partially  offset  by  proceeds  from  the 
issuance of debt of $6.9 billion. Cash used in financing activities during 2021 was primarily due to payments to repurchase our 
common stock of $5.0 billion and the payment of dividends of $4.0 billion, partially offset by proceeds from the issuance of 
debt, net of repayments of $0.8 billion.

See  Part  IV—Note  10,  Investments;  Note  16,  Financing  arrangements;  and  Note  17,  Stockholders’  equity,  to  the 

Consolidated Financial Statements.

Capital requirements

We have material cash requirements to pay third parties under various contractual obligations discussed below.

We are obligated to pay interest and repay principal under our various financing arrangements, including amounts under 
interest  rate  swap  and  cross-currency  swap  contracts  related  to  certain  of  our  long-term  debt  obligations.  For  information  on 
scheduled debt maturities and payments under derivative contracts associated with our long-term debt obligations, see Part IV
—Note 16, Financing arrangements, and Note 19, Derivative instruments, to the Consolidated Financial Statements.

We are obligated to make payments for operating leases, including rental commitments on abandoned leases and leases 
that  have  not  yet  commenced.  For  information  on  these  obligations,  see  Part  IV—Note  14,  Leases,  to  the  Consolidated 
Financial Statements.

Under  the  2017  Tax  Act,  we  elected  to  pay  in  eight  annual  installments  the  repatriation  tax  related  primarily  to  prior 
indefinitely  invested  earnings  of  our  foreign  operations.  For  information  on  the  remaining  scheduled  repatriation  tax 
installments,  see  Part  IV—Note  20,  Contingencies  and  commitments—Commitments—U.S.  repatriation  tax,  to  the 
Consolidated Financial Statements.

We  have  purchase  obligations  of  $4.3  billion  primarily  related  to  (i)  R&D  commitments  (including  those  related  to 
clinical trials) for new and existing products, (ii) capital expenditures and (iii) open purchase orders for the acquisition of goods 
and services in the ordinary course of business. Most of these obligations are expected to be paid within one year, and payment 
of certain of these amounts may be reduced based on certain future events.

 In addition to the purchase obligations noted above, we are contractually obligated to pay additional amounts that in the 
aggregate are significant, upon the achievement of various development, regulatory and commercial milestones for agreements 
we have entered into with third parties, including contingent consideration incurred in the acquisitions of Teneobio and Kirin-
Amgen, Inc. These payments are contingent upon the occurrence of various future events, substantially all of which have a high 
degree  of  uncertainty  of  occurring,  and  any  resulting  cash  requirements  are  managed  through  our  operational  budgeting 
processes. Except with respect to the fair value of the contingent consideration of approximately $96 million, these obligations 
are not recorded on our Consolidated Balance Sheets. As of December 31, 2023, the maximum amount that may be payable in 
the future for agreements we have entered into with third parties is $8.3 billion.

We have recorded liabilities for UTBs that, because of their nature, have a high degree of uncertainty regarding the timing 
of future cash payment and other events that extinguish these liabilities. See Part IV—Note 7, Income taxes, to the Consolidated 
Financial Statements.

75

Critical Accounting Policies and Estimates

The  preparation  of  our  consolidated  financial  statements  in  conformity  with  GAAP  requires  management  to  make 
estimates and assumptions that affect the amounts reported in the financial statements and the notes to the financial statements. 
Some  of  those  judgments  can  be  subjective  and  complex,  and  therefore,  actual  results  could  differ  materially  from  those 
estimates  under  different  assumptions  or  conditions.  Our  significant  accounting  policies  are  included  in  Part  IV—Note  1, 
Summary of significant accounting policies, to the Consolidated Financial Statements. The following are considered critical to 
our consolidated financial statements because they require the most difficult, subjective or complex judgments, often because of 
the need to make estimates about matters that are inherently uncertain.

Product sales and sales deductions

Revenue from product sales is recognized upon transfer of control of a product to a customer, generally upon delivery, 
based  on  an  amount  that  reflects  the  consideration  to  which  we  expect  to  be  entitled,  net  of  accruals  for  estimated  rebates, 
wholesaler chargebacks, discounts and other deductions (collectively, sales deductions) and returns established at the time of 
sale.

We  analyze  the  adequacy  of  our  accruals  for  sales  deductions  quarterly.  Amounts  accrued  for  sales  deductions  are 
adjusted when trends or significant events indicate that adjustment is appropriate. Accruals are also adjusted to reflect actual 
results.  Amounts  recorded  in  Accrued  liabilities  in  the  Consolidated  Balance  Sheets  for  sales  deductions  were  as  follows  (in 
millions):

Rebates

Chargebacks

Other deductions

Total

Balance as of December 31, 2020

$ 

3,979  $ 

591  $ 

239  $ 

Amounts charged against product sales

Payments

Balance as of December 31, 2021

Amounts charged against product sales

Payments

Balance as of December 31, 2022

Additions (1)
Amounts charged against product sales

Payments

10,195 

(10,027)   

4,147 

12,500 

9,619 

(9,413)   

797 

10,630 

4,809 

21,879 

2,065 

(2,074)   

(21,514) 

230 

2,288 

5,174 

25,418 

(11,768)   

(10,578)   

(2,260)   

(24,606) 

4,879 

263 

14,328 

849 

24 

13,349 

258 

39 

2,533 

(13,634)   

(13,125)   

(2,492)   

5,986 

326 

30,210 

(29,251) 

7,271 

Balance as of December 31, 2023

$ 

5,836  $ 

1,097  $ 

338  $ 

____________

(1)  Represents sales deductions assumed from the Horizon acquisition.

For the years ended December 31, 2023, 2022 and 2021, total sales deductions were 53%, 51% and 47% of gross product 
sales, respectively. The increase in the total sales deductions balance as of December 31, 2023, compared with December 31, 
2022, was primarily driven by the impact of higher U.S. chargeback and commercial rebate discount rates, an increase in gross 
sales and Horizon integrated beginning balances, partially offset by timing of payments. Included in the amounts are immaterial 
net adjustments related to prior-year sales due to changes in estimates.

In the United States, we use wholesalers as the principal means of distributing our products to healthcare providers such 
as physicians or their clinics, dialysis centers, hospitals and pharmacies. Products we sell in Europe are distributed principally 
to hospitals and/or wholesalers depending on the distribution practice in each country where the products are sold. We monitor 
the  inventory  levels  of  our  products  at  our  wholesalers  by  using  data  from  our  wholesalers  and  other  third  parties,  and  we 
believe  wholesaler  inventories  have  been  maintained  at  appropriate  levels  (generally  two  to  three  weeks)  given  end-user 
demand.  Accordingly,  historical  fluctuations  in  wholesaler  inventory  levels  have  not  significantly  affected  our  method  of 
estimating sales deductions and returns.

Accruals for sales deductions are based primarily on estimates of the amounts earned or to be claimed on the related sales. 
These  estimates  take  into  consideration  current  contractual  and  statutory  requirements,  specific  known  market  events  and 
trends, internal and external historical data and forecasted customer buying patterns. Sales deductions are substantially product 
specific and therefore, for any given year, can be affected by the mix of products sold.

76

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rebates  include  primarily  amounts  paid  to  payers  and  providers  in  the  United  States,  including  those  paid  to  state 
Medicaid programs, and are based on contractual arrangements or statutory requirements that vary by product, by payer and by 
individual payer plans. As we sell products, we estimate the amount of rebate we will pay based on the product sold, contractual 
terms, estimated patient population, historical experience and wholesaler inventory levels; and we accrue these rebates in the 
period the related sales are recorded. We then adjust the rebate accruals as more information becomes available and to reflect 
actual claims experience. Estimating such rebates is complicated, in part because of the time delay between the date of sale and 
the actual settlement of the liability. We believe the methodology we use to accrue for rebates is reasonable and appropriate 
given current facts and circumstances, but actual results may differ. 

Wholesaler chargebacks relate to our contractual agreements to sell products to healthcare providers in the United States 
at fixed prices that are lower than the prices we charge wholesalers. When healthcare providers purchase our products through 
wholesalers at these reduced prices, wholesalers charge us for the difference between their purchase prices and the contractual 
prices  between  Amgen  and  the  healthcare  providers.  The  provision  for  chargebacks  is  based  on  expected  sales  by  our 
wholesaler  customers  to  healthcare  providers.  Accruals  for  wholesaler  chargebacks  are  less  difficult  to  estimate  than  rebates 
are, and they closely approximate actual results because chargeback amounts are fixed at the date of purchase by the healthcare 
providers and because we generally settle the liability for these deductions within a few weeks.

Product returns

Returns  are  estimated  by  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, when appropriate. In each of the past three years, sales return provisions have amounted to less than 1% of gross 
product sales. Changes in estimates for prior-year sales return provisions have historically been immaterial.

Income taxes

We  provide  for  income  taxes  based  on  pretax  income  and  applicable  tax  rates  in  the  various  jurisdictions  in  which  we 

operate. 

We recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be 
sustained upon examination by tax authorities based on the technical merits of the position. The tax benefit recognized in the 
consolidated financial statements for a particular tax position is based on the largest benefit that is more likely than not to be 
realized.  The  amount  of  UTBs  is  adjusted  as  appropriate  for  changes  in  facts  and  circumstances,  such  as  significant 
amendments to existing tax law, new regulations or interpretations by tax authorities, new information obtained during a tax 
examination or resolution of an examination. We believe our estimates for uncertain tax positions are appropriate and sufficient 
for  any  assessments  that  may  result  from  examinations  of  our  tax  returns.  We  recognize  both  accrued  interest  and  penalties, 
when appropriate, related to UTBs in income tax expense. See Part IV—Note 7, Income taxes, to the Consolidated Financial 
Statements. 

Certain items are included in our tax return at different times than they are reflected in the financial statements, and they 
cause  temporary  differences  between  the  tax  bases  of  assets  and  liabilities  and  their  reported  amounts.  Such  temporary 
differences create deferred tax assets and liabilities. Deferred tax assets are generally items that can be used as tax deductions or 
credits  in  tax  returns  in  future  years  but  for  which  we  have  already  recorded  the  tax  benefit  in  the  consolidated  financial 
statements.  We  establish  valuation  allowances  against  our  deferred  tax  assets  when  the  amount  of  expected  future  taxable 
income is not likely to support the use of the deduction or credit. Deferred tax liabilities are either (i) tax expenses recognized in 
the  consolidated  financial  statements  for  which  payment  has  been  deferred,  (ii)  expenses  for  which  we  have  already  taken  a 
deduction  on  the  tax  return  but  have  not  yet  recognized  in  the  consolidated  financial  statements  or  (iii)  liabilities  for  the 
difference between the book basis and the tax basis of the intangible assets acquired in many business combinations, because 
future expenses associated with these assets most often will not be tax deductible. 

We  are  a  vertically  integrated  enterprise  with  operations  in  the  United  States  and  various  foreign  jurisdictions.  In  the 
jurisdictions  where  we  conduct  operations,  we  are  subject  to  income  tax  based  on  the  tax  laws  and  principles  of  such 
jurisdictions and on the functions, risks and activities performed therein. Our pretax income is therefore attributed to domestic 
or foreign sources based on the operations performed and risks assumed in each location and the tax laws and principles of the 
respective taxing jurisdictions. For example, we conduct significant operations in Puerto Rico, a territory of the United States 
that  is  treated  as  a  foreign  jurisdiction  for  U.S.  tax  purposes,  pertaining  to  manufacturing,  distribution  and  other  related 
functions to meet our worldwide product demand. Income from our operations in Puerto Rico is subject to tax incentive grants 
through 2050.

In  2017,  we  received  an  RAR  and  a  modified  RAR  from  the  IRS  for  the  years  2010–2012,  proposing  significant 
adjustments  that  primarily  relate  to  the  allocation  of  profits  between  certain  of  our  entities  in  the  United  States  and  the  U.S. 
territory  of  Puerto  Rico.  We  disagreed  with  the  proposed  adjustments  and  calculations  and  pursued  resolution  with  the  IRS 

77

appeals  office  but  were  unable  to  reach  resolution.  In  July  2021,  we  filed  a  petition  in  the  U.S.  Tax  Court  to  contest  two 
duplicate Statutory Notices of Deficiency (Notices) for the years 2010–2012 that we received in May and July 2021, which seek 
to  increase  our  U.S.  taxable  income  for  the  years  2010–2012  by  an  amount  that  would  result  in  additional  federal  tax  of 
approximately $3.6 billion plus interest. Any additional tax that could be imposed for the years 2010–2012 would be reduced 
by up to approximately $900 million of repatriation tax previously accrued on our foreign earnings.

In  2020,  we  received  an  RAR  and  a  modified  RAR  from  the  IRS  for  the  years  2013–2015,  also  proposing  significant 
adjustments  that  primarily  relate  to  the  allocation  of  profits  between  certain  of  our  entities  in  the  United  States  and  the  U.S. 
territory of Puerto Rico similar to those proposed for the years 2010–2012. We disagreed with the proposed adjustments and 
calculations and pursued resolution with the IRS appeals office but were unable to reach resolution. In July 2022, we filed a 
petition in the U.S. Tax Court to contest a Notice for the years 2013–2015 that we previously reported receiving in April 2022 
that seeks to increase our U.S. taxable income for the years 2013–2015 by an amount that would result in additional federal tax 
of  approximately  $5.1  billion,  plus  interest.  In  addition,  the  Notice  asserts  penalties  of  approximately  $2.0  billion.  Any 
additional  tax  that  could  be  imposed  for  the  years  2013–2015  would  be  reduced  by  up  to  approximately  $2.2  billion  of 
repatriation tax previously accrued on our foreign earnings.

We firmly believe that the IRS positions set forth in the 2010–2012 and 2013–2015 Notices are without merit. We are 
contesting  the  2010–2012  and  2013–2015  Notices  through  the  judicial  process.  The  two  cases  were  consolidated  in  the  U.S. 
Tax Court on December 19, 2022. On February 10, 2023, the U.S. Tax Court entered an order setting a trial date of November 
4, 2024.

We  are  currently  under  examination  by  the  IRS  for  the  years  2016–2018  with  respect  to  issues  similar  to  those  for  the 

2010 through 2015 period. In addition, we have examinations by a number of state and foreign tax jurisdictions.

Final resolution of these complex matters is not likely within the next 12 months. We continue to believe our accrual for 
income tax liabilities is appropriate based on past experience, interpretations of tax law, application of the tax law to our facts 
and judgments about potential actions by tax authorities; however, due to the complexity of the provision for income taxes and 
uncertain resolution of these matters, the ultimate outcome of any tax matters may result in payments substantially greater than 
amounts accrued and could have a material adverse impact on our consolidated financial statements. See Part I, Item 1A. Risk 
Factors—We could be subject to additional tax liabilities, including from an adverse outcome in our ongoing tax dispute with 
the  IRS  and  other  tax  examinations,  enactment  of  the  OECD  minimum  corporate  tax  rate  agreement  and  the  adoption  and 
interpretation of new tax legislation, and we anticipate additional tax liabilities from certain provisions of the 2017 Tax Act 
that will go into effect in 2026; such tax liabilities could adversely affect our profitability and results of operations; Part II, Item 
7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Results of Operations, Income 
taxes; and Part IV—Note 7, Income taxes, to the Consolidated Financial Statements for further discussion.

Our operations are subject to the tax laws, regulations and administrative practices of the United States, the U.S. territory 
of Puerto Rico, U.S. state jurisdictions and other countries in which we do business. Significant changes in these rules could 
have a material adverse effect on our results of operations. See Part I, Item 1A. Risk Factors—We could be subject to additional 
tax  liabilities,  including  from  an  adverse  outcome  in  our  ongoing  tax  dispute  with  the  IRS  and  other  tax  examinations, 
enactment of the OECD minimum corporate tax rate agreement and the adoption and interpretation of new tax legislation, and 
we  anticipate  additional  tax  liabilities  from  certain  provisions  of  the  2017  Tax  Act  that  will  go  into  effect  in  2026;  such  tax 
liabilities could adversely affect our profitability and results of operations.

Contingencies

In  the  ordinary  course  of  business,  we  are  involved  in  various  legal  proceedings,  government  investigations  and  other 
matters such as intellectual property disputes, contractual disputes and class action suits that are complex in nature and have 
outcomes that are difficult to predict. We describe our legal proceedings and other matters that are significant or that we believe 
could become significant in Part IV—Note 20, Contingencies and commitments, to the Consolidated Financial Statements. We 
record  accruals  for  loss  contingencies  to  the  extent  that  we  conclude  it  is  probable  that  a  liability  has  been  incurred  and  the 
amount of the related loss can be reasonably estimated. We evaluate, on a quarterly basis, developments in legal proceedings 
and other matters that could cause an increase or decrease in the amount of the liability that has been accrued previously.

While it is not possible to accurately predict or determine the eventual outcomes of these items, an adverse determination 
in one or more of these items currently pending could have a material adverse effect on our consolidated results of operations, 
financial position or cash flows.

78

Valuation of assets and liabilities in connection with acquisitions

We  have  acquired  and  continue  to  acquire  intangible  assets  in  connection  with  business  combinations  and  asset 
acquisitions.  These  intangible  assets  consist  primarily  of  technology  associated  with  currently  marketed  human  therapeutic 
products and IPR&D product candidates. Discounted cash flow models are typically used to determine the fair values of these 
intangible assets for purposes of allocating consideration paid to the net assets acquired in an acquisition. See Part IV—Note 3, 
Acquisitions and divestitures, to the Consolidated Financial Statements. These models require the use of significant estimates 
and assumptions, including but not limited to:

•

•

•

•

determining the timing and expected costs to complete in-process projects, taking into account the stage of completion at 
the acquisition date;

projecting  the  probability  and  timing  of  obtaining  marketing  approval  from  the  FDA  and  other  regulatory  agencies  for 
product candidates;

estimating the timing of and future net cash flows from product sales resulting from completed products and in-process 
projects; and

developing appropriate discount rates to calculate the present values of the cash flows. 

Significant  estimates  and  assumptions  are  also  required  to  determine  the  business  combination  date  fair  values  of  any 
contingent  consideration  obligations  incurred  in  connection  with  business  combinations.  In  addition,  we  must  revalue  these 
obligations each subsequent reporting period until the related contingencies are resolved and record changes in their fair values 
in  earnings.  The  acquisition  date  fair  values  of  contingent  consideration  obligations  incurred  or  assumed  in  the  acquisitions 
were  determined  using  a  combination  of  valuation  techniques.  Significant  estimates  and  assumptions  required  for  these 
valuations  included  but  were  not  limited  to  the  timing  and  probability  of  achieving  regulatory  milestones,  product  sales 
projections  under  various  scenarios  and  discount  rates  used  to  calculate  the  present  value  of  the  required  payments.  These 
estimates  and  assumptions  are  required  to  be  updated  in  order  to  revalue  these  contingent  consideration  obligations  each 
reporting  period.  Accordingly,  subsequent  changes  in  underlying  facts  and  circumstances  could  result  in  changes  in  these 
estimates and assumptions, which could have a material impact on the estimated future fair values of these obligations.

We believe the fair values used to record intangible assets acquired and contingent consideration obligations incurred in 
connection with business combinations and asset acquisitions are based on reasonable estimates and assumptions given the facts 
and circumstances as of the related valuation dates.

Impairment of long-lived assets

We review the carrying value of our property, plant and equipment and our finite-lived intangible assets for impairment 
whenever  events  or  changes  in  circumstances  indicate  that  the  carrying  amount  of  an  asset  may  not  be  recoverable.  If  such 
circumstances exist, an estimate of undiscounted future cash flows to be generated by the long-lived asset is compared with the 
carrying value to determine whether an impairment exists. If an asset is determined to be impaired, the loss is measured based 
on the difference between the asset’s fair value and its carrying value.

Indefinite-lived intangible assets, composed of IPR&D projects acquired in a business combination that have not reached 
technological  feasibility  or  that  lack  regulatory  approval  at  the  time  of  acquisition,  are  reviewed  for  impairment  annually, 
whenever events or changes in circumstances indicate that the carrying amount may not be recoverable and upon establishment 
of  technological  feasibility  or  regulatory  approval.  We  determine  impairment  by  comparing  the  fair  value  of  the  asset  to  its 
carrying value. If the asset’s carrying value exceeds its fair value, an impairment charge is recorded for the difference, and its 
carrying value is reduced accordingly.

Estimating future cash flows of an IPR&D product candidate for purposes of an impairment analysis requires us to make 
significant estimates and assumptions regarding the amount and timing of costs to complete the project and the amount, timing 
and probability of achieving revenues from the completed product similar to how the acquisition date fair value of the project 
was determined, as described above. There are often major risks and uncertainties associated with IPR&D projects as we are 
required to obtain regulatory approvals in order to be able to market these products. Such approvals require completing clinical 
trials  that  demonstrate  a  product  candidate  is  safe  and  effective.  Consequently,  the  eventual  realized  value  of  the  acquired 
IPR&D  project  may  vary  from  its  fair  value  at  the  date  of  acquisition,  and  IPR&D  impairment  charges  may  occur  in  future 
periods which could have a material adverse effect on our results of operations.

We  believe  our  estimations  of  future  cash  flows  used  for  assessing  impairment  of  long-lived  assets  are  based  on 

reasonable assumptions given the facts and circumstances as of the related dates of the assessments.

79

Recently Issued Accounting Standards

See  Part  IV—Note  1,  Summary  of  significant  accounting  policies,  to  the  Consolidated  Financial  Statements  for  a 

discussion of recently issued accounting pronouncements not yet adopted as of December 31, 2023.

Item 7A.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to market risks that may result from changes in interest rates, foreign currency exchange rates and prices 
of equity instruments as well as changes in general economic conditions in the countries where we conduct business. To reduce 
certain of these risks, we enter into various types of foreign currency and interest rate derivative hedging transactions as part of 
our risk management program. We do not use derivatives for speculative trading purposes.

In  the  discussion  that  follows,  we  assumed  a  hypothetical  change  in  interest  rates  of  100  basis  points  from  those  as  of 
December  31,  2023  and  2022.  Except  as  noted  below,  we  also  assumed  a  hypothetical  20%  change  in  foreign  currency 
exchange rates against the U.S. dollar based on its position relative to other currencies as of December 31, 2023 and 2022.

Interest-rate-sensitive financial instruments

Our portfolio of available-for-sale investments as of December 31, 2023 and 2022, was composed almost entirely of U.S. 
Treasury securities and money market mutual funds. The fair values of our available-for-sale investments were $10.4 billion 
and  $4.3  billion  as  of  December  31,  2023  and  2022,  respectively.  Duration  is  a  sensitivity  measure  that  can  be  used  to 
approximate the change in the value of a security that will result from a 100 basis point change in interest rates. Applying a 
duration  model,  a  hypothetical  100  basis  point  increase  in  interest  rates  as  of  December  31,  2023  and  2022,  would  not  have 
resulted  in  a  material  reduction  in  the  fair  values  of  these  securities.  In  addition,  a  hypothetical  100  basis  point  decrease  in 
interest rates as of December 31, 2023 and 2022, would not result in a material effect on income in the respective ensuing year.

As of December 31, 2023, we had outstanding debt with a carrying value of $64.6 billion and a fair value of $59.2 billion. 
As of December 31, 2022, we had outstanding debt with a carrying value of $38.9 billion and a fair value of $35.0 billion. Our 
outstanding  debt  was  composed  of  debt  with  fixed  interest  rates.  Changes  in  interest  rates  do  not  affect  interest  expense  on 
fixed-rate  debt.  Changes  in  interest  rates  would,  however,  affect  the  fair  values  of  fixed-rate  debt.  A  hypothetical  100  basis 
point decrease in interest rates relative to interest rates as of December 31, 2023 and 2022, would have resulted in an increase of 
$5.4 billion and $3.5 billion, respectively, in the aggregate fair value of our outstanding debt on these dates. Analysis of the 
debt does not consider the impact that hypothetical changes in interest rates would have on related interest rate swap contracts 
and cross-currency swap contracts, discussed below.

To achieve a desired mix of fixed-rate and floating-rate debt, we entered into interest rate swap contracts that qualified 
and were designated for accounting purposes as fair value hedges for certain of our fixed-rate debt. These interest rate swap 
contracts effectively converted a fixed-rate interest coupon to a floating-rate SOFR-based coupon over the life of the respective 
notes. Interest rate swap contracts with aggregate notional amounts of $6.7 billion were outstanding as of both December 31, 
2023 and 2022. A hypothetical 100 basis point increase in interest rates relative to interest rates as of December 31, 2023 and 
2022,  would  have  resulted  in  reductions  in  fair  values  of  approximately  $180  million  and  $210  million,  respectively,  on  our 
interest  rate  swap  contracts  on  these  dates.  Analysis  of  the  interest  rate  swap  contracts  does  not  consider  the  impact  that 
hypothetical changes in interest rates would have on the related fair values of debt that these interest-rate-sensitive instruments 
were designed to offset.

As of December 31, 2023 and 2022, we had outstanding cross-currency swap contracts with aggregate notional amounts 
of $2.7 billion and $3.4 billion, respectively, that hedge our foreign-currency-denominated debt and related interest payments. 
These contracts effectively convert interest payments and principal repayment of this debt to U.S. dollars from euros, pounds 
sterling  and  Swiss  francs  and  are  designated  for  accounting  purposes  as  cash  flow  hedges.  A  hypothetical  100  basis  point 
adverse  movement  in  interest  rates  relative  to  interest  rates  as  of  December  31,  2023  and  2022,  would  have  resulted  in 
reductions in the fair values of our cross-currency swap contracts of approximately $100 million and $90 million, respectively.

Foreign-currency-sensitive financial instruments

Our international operations are affected by fluctuations in the value of the U.S. dollar compared with foreign currencies, 
predominantly  the  euro.  Increases  and  decreases  in  our  international  product  sales  from  movements  in  foreign  currency 
exchange  rates  are  partially  offset  by  corresponding  increases  or  decreases  in  our  international  operating  expenses.  Increases 
and  decreases  in  our  foreign-currency-denominated  assets  from  movements  in  foreign  currency  exchange  rates  are  partially 
offset  by  corresponding  increases  or  decreases  in  our  foreign-currency-denominated  liabilities.  To  further  reduce  our  net 
exposure to foreign currency exchange rate fluctuations on our results of operations, we enter into foreign currency forward and 
cross-currency swap contracts.

80

As of December 31, 2023, we had outstanding euro- and pound-sterling- denominated debt with a principal carrying value 
and  a  fair  value  of  $2.3  billion  and  $2.3  billion,  respectively.  As  of  December  31,  2022,  we  had  outstanding  euro-,  pound-
sterling-  and  Swiss-franc-denominated  debt  with  a  principal  carrying  value  and  a  fair  value  of  $3.0  billion  and  $2.9  billion, 
respectively. A hypothetical 20% adverse movement in foreign currency exchange rates compared with the U.S. dollar relative 
to  exchange  rates  as  of  December  31,  2023,  would  have  resulted  in  an  increase  in  fair  value  of  this  debt  of  approximately 
$470 million on this date and a reduction in income in the ensuing year of approximately $460 million. A hypothetical 20% 
adverse movement in foreign currency exchange rates compared with the U.S. dollar relative to exchange rates as of December 
31, 2022, would have resulted in an increase in fair value of this debt of $580 million on this date and a reduction in income in 
the ensuing year of $600 million. The impact on income from these hypothetical changes in foreign currency exchange rates 
would be substantially offset by the impact such changes would have on related cross-currency swap contracts, which are in 
place for the related foreign-currency-denominated debt.

We  have  cross-currency  swap  contracts  that  are  designated  as  cash  flow  hedges  of  our  debt  denominated  in  euros  and 
pounds sterling (and Swiss francs with respect to the prior year), with aggregate notional amount of $2.7 billion and $3.4 billion 
as of December 31, 2023 and 2022, respectively. A hypothetical 20% adverse movement in foreign currency exchange rates 
compared with the U.S. dollar relative to exchange rates on these dates would have resulted in reductions in the fair values of 
these contracts of approximately $480 million and $540 million on these dates, respectively. The impact of this hypothetical 
adverse movement in foreign currency exchange rates on ensuing years’ income from these contracts would be fully offset by 
corresponding hypothetical changes in the carrying amounts of the related hedged debt.

We  enter  into  foreign  currency  forward  contracts  that  are  designated  for  accounting  purposes  as  cash  flow  hedges  of 
certain  anticipated  foreign  currency  transactions.  As  of  December  31,  2023,  the  fair  values  of  these  contracts  were  a 
$145 million asset and a $116 million liability. As of December 31, 2022, the fair values of these contracts were a $288 million 
asset  and  a  $76  million  liability.  As  of  December  31,  2023,  we  had  primarily  euro-based  open  foreign  currency  forward 
contracts with notional amounts of $6.6 billion. As of December 31, 2022, we had primarily euro-based open foreign currency 
forward contracts with notional amounts of $6.0 billion. With regard to foreign currency forward contracts that were open as of 
December 31, 2023, a hypothetical 20% adverse movement in foreign currency exchange rates compared with the U.S. dollar 
relative  to  exchange  rates  as  of  December  31,  2023,  would  have  resulted  in  a  reduction  in  fair  value  of  these  contracts  of 
approximately  $1.2  billion  on  this  date  and  in  the  ensuing  year,  a  reduction  in  income  of  approximately  $690  million.  With 
regard  to  contracts  that  were  open  as  of  December  31,  2022,  a  hypothetical  20%  adverse  movement  in  foreign  currency 
exchange  rates  compared  with  the  U.S.  dollar  relative  to  exchange  rates  as  of  December  31,  2022,  would  have  resulted  in  a 
reduction  in  fair  value  of  these  contracts  of  approximately  $1.1  billion  on  this  date  and  in  the  ensuing  year,  a  reduction  in 
income of $590 million. The analysis does not consider the impact that hypothetical changes in foreign currency exchange rates 
would have on anticipated transactions that these foreign-currency-sensitive instruments were designed to offset.

As of December 31, 2023 and 2022, we had open, short-duration, foreign currency forward contracts that mature in one 
month or less, that had notional amounts of $0.5 billion and $0.5 billion, respectively, and that hedged fluctuations of certain 
assets  and  liabilities  denominated  in  foreign  currencies  but  were  not  designated  as  hedges  for  accounting  purposes.  These 
contracts  had  no  material  net  unrealized  gains  or  losses  as  of  December  31,  2023  and  2022.  With  regard  to  these  foreign 
currency forward contracts that were open as of December 31, 2023 and 2022, a hypothetical 5% adverse movement in foreign 
currency  exchange  rates  compared  with  the  U.S.  dollar  relative  to  exchange  rates  on  these  dates  would  not  have  a  material 
effect on the fair values of these contracts or related income in the respective ensuing years. The analysis does not consider the 
impact  that  hypothetical  changes  in  foreign  currency  exchange  rates  would  have  on  assets  and  liabilities  that  these  foreign-
currency-sensitive instruments were designed to offset.

Market-price-sensitive financial instruments

As  of  December  31,  2023  and  2022,  we  were  exposed  to  price  risk  on  equity  securities  included  in  our  portfolio  of 
investments, which were acquired primarily for the promotion of business and strategic objectives. These investments include 
our  investments  in  BeiGene  and  Neumora,  as  well  as  other  publicly  and  privately  held  small-capitalization  stocks,  limited 
partnerships  that  invest  in  early-stage  biotechnology  companies.  A  20%  decrease  in  the  aggregate  value  of  our  equity 
investment portfolio as of December 31, 2023 and 2022, would result in losses in fair value of approximately $1.0 billion and 
$1.1 billion, respectively.

Counterparty credit risks

Our financial instruments, including derivatives, are subject to counterparty credit risk, which we consider as part of the 
overall  fair  value  measurement.  Our  financial  risk  management  policy  limits  derivative  transactions  by  requiring  that 
transactions be made only with institutions with minimum credit ratings of A– or equivalent by S&P, Moody’s or Fitch; and it 
places exposure limits on the amount with any individual counterparty. In addition, we have an investment policy that limits 

81

investments to certain types of debt and money market instruments issued by institutions with investment-grade credit ratings 
and places restriction on maturities and concentrations by asset class and issuer.

Item 8.

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The information required by this item is incorporated herein by reference to the financial statements and schedule listed in 

Item 15(a)1 and (a)2 of Part IV and included in this Annual Report on Form 10-K.

Item 9.

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
FINANCIAL DISCLOSURE

None.

82

Item 9A.

CONTROLS AND PROCEDURES

We  maintain  “disclosure  controls  and  procedures,”  as  such  term  is  defined  under  the  Securities  Exchange  Act 
Rule  13a-15(e),  that  are  designed  to  ensure  that  information  required  to  be  disclosed  in  Amgen’s  Exchange  Act  reports  is 
recorded,  processed,  summarized  and  reported  within  the  time  periods  specified  in  the  SEC’s  rules  and  forms  and  that  such 
information  is  accumulated  and  communicated  to  Amgen’s  management,  including  its  Chief  Executive  Officer  and  Chief 
Financial  Officer,  as  appropriate,  to  allow  timely  decisions  regarding  required  disclosures.  In  designing  and  evaluating  the 
disclosure  controls  and  procedures,  Amgen’s  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  in  reaching  a 
reasonable level of assurance, Amgen’s management is required to apply its judgment in evaluating the cost-benefit relationship 
of possible controls and procedures. We have carried out an evaluation under the supervision and with the participation of our 
management, including Amgen’s Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and 
operation of Amgen’s disclosure controls and procedures. Based upon their evaluation and subject to the foregoing, the Chief 
Executive  Officer  and  Chief  Financial  Officer  concluded  that  our  disclosure  controls  and  procedures  were  effective  as  of 
December 31, 2023.

Management  determined  that  as  of  December  31,  2023,  there  were  no  changes  in  our  internal  control  over  financial 
reporting that occurred during the fiscal quarter then ended that have materially affected or are reasonably likely to materially 
affect our internal control over financial reporting.

Management’s Report on Internal Control over Financial Reporting

Management  of  the  Company  is  responsible  for  establishing  and  maintaining  adequate  internal  control  over  financial 
reporting, as such term is defined in Rule 13a-15(f) under the Securities Exchange Act of 1934. The Company’s internal control 
over  financial  reporting  is  designed  to  provide  reasonable  assurance  regarding  the  reliability  of  financial  reporting  and  the 
preparation of financial statements for external purposes in accordance with GAAP in the United States. However, all internal 
control  systems,  no  matter  how  well  designed,  have  inherent  limitations.  Therefore,  even  those  systems  determined  to  be 
effective can provide only reasonable assurance with respect to financial statement preparation and reporting.

Management  assessed  the  effectiveness  of  the  Company’s  internal  control  over  financial  reporting  as  of  December  31, 
2023.  In  making  this  assessment,  management  used  the  criteria  set  forth  by  the  COSO  in  Internal  Control—Integrated 
Framework (2013 framework). Based on our assessment, management believes that the Company maintained effective internal 
control over financial reporting as of December 31, 2023, based on the COSO criteria.

Management has excluded Horizon, which was acquired by us on October 6, 2023, from its assessment of internal control 
over  financial  reporting  as  of  December  31,  2023.  Total  assets  and  revenues  of  Horizon  excluded  from  our  assessment  of 
internal control over financial reporting were approximately 7% of total assets and 3% of total revenues as of and for the year 
ended December 31, 2023, respectively.

The effectiveness of the Company’s internal control over financial reporting has been audited by Ernst & Young LLP, an 
independent  registered  public  accounting  firm,  as  stated  in  their  attestation  report  appearing  below,  which  expresses  an 
unqualified opinion on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2023.

83

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Amgen Inc. 

Opinion on Internal Control Over Financial Reporting

We  have  audited  Amgen  Inc.’s  internal  control  over  financial  reporting  as  of  December  31,  2023,  based  on  criteria 
established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway 
Commission  (2013  framework)  (the  COSO  criteria).  In  our  opinion,  Amgen  Inc.  (the  Company)  maintained,  in  all  material 
respects, effective internal control over financial reporting as of December 31, 2023, based on the COSO criteria.

As  indicated  in  the  accompanying  Management’s  Report  on  Internal  Control  over  Financial  Reporting,  management’s 
assessment  of  and  conclusion  on  the  effectiveness  of  internal  control  over  financial  reporting  did  not  include  the  internal 
controls  of  Horizon  Therapeutics  plc,  which  is  included  in  the  2023  consolidated  financial  statements  of  the  Company  and 
constituted  7%  of  total  assets  as  of  December  31,  2023  and  3%  of  revenues  for  the  year  then  ended.  Our  audit  of  internal 
control  over  financial  reporting  of  the  Company  also  did  not  include  an  evaluation  of  the  internal  control  over  financial 
reporting of Horizon Therapeutics plc.

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board  (United 
States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2023 and 2022, the related consolidated 
statements  of  income,  comprehensive  income,  stockholders’  equity  and  cash  flows  for  each  of  the  three  years  in  the  period 
ended December 31, 2023, and the related notes and the financial statement schedule listed in the Index at Item 15(a)2 and our 
report dated February 14, 2024 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its 
assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report 
on  Internal  Control  over  Financial  Reporting.  Our  responsibility  is  to  express  an  opinion  on  the  Company’s  internal  control 
over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be 
independent  with  respect  to  the  Company  in  accordance  with  the  U.S.  federal  securities  laws  and  the  applicable  rules  and 
regulations of the Securities and Exchange Commission and the PCAOB.

We  conducted  our  audit  in  accordance  with  the  standards  of  the  PCAOB.  Those  standards  require  that  we  plan  and 
perform  the  audit  to  obtain  reasonable  assurance  about  whether  effective  internal  control  over  financial  reporting  was 
maintained in all material respects.

Our  audit  included  obtaining  an  understanding  of  internal  control  over  financial  reporting,  assessing  the  risk  that  a 
material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed 
risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides 
a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the 
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally 
accepted  accounting  principles.  A  company’s  internal  control  over  financial  reporting  includes  those  policies  and  procedures 
that  (1)  pertain  to  the  maintenance  of  records  that,  in  reasonable  detail,  accurately  and  fairly  reflect  the  transactions  and 
dispositions of the assets of the company; (2) 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  (3)  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.

Los Angeles, California
February 14, 2024

/s/ Ernst & Young LLP

84

Item 9B.

OTHER INFORMATION

Rule 10b5-1 trading arrangements

During the three months ended December 31, 2023, none of our directors or officers (as defined in Rule 16a-1(f) of the 
Exchange  Act)  adopted  or  terminated  any  “Rule  10b5-1  trading  arrangement”  or  “non-Rule  10b5-1  trading  arrangement,”  as 
each term is defined in Item 408 of Regulation S-K.

Item 9C.

DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS

Not applicable.

PART III

Item 10.

DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Information  about  our  Directors  is  incorporated  by  reference  from  the  section  entitled  ITEM  1—ELECTION  OF 
DIRECTORS in our Proxy Statement for the 2024 Annual Meeting of Stockholders to be filed with the SEC within 120 days of 
December 31, 2023 (the Proxy Statement). Information about the procedures by which stockholders may recommend nominees 
for  the  Board  of  Directors  is  incorporated  by  reference  from  APPENDIX  A—AMGEN  INC.  BOARD  OF  DIRECTORS 
GUIDELINES  FOR  DIRECTOR  QUALIFICATIONS  AND  EVALUATIONS  and  OTHER  MATTERS—Stockholder 
Proposals  for  the  2025  Annual  Meeting  in  our  Proxy  Statement.  Information  about  our  Audit  Committee,  members  of  the 
committee  and  our  Audit  Committee  financial  experts  is  incorporated  by  reference  from  the  section  entitled  CORPORATE 
GOVERNANCE—Audit  Committee  in  our  Proxy  Statement.  Information  about  our  executive  officers  is  contained  in  the 
discussion entitled Part I, Item 1. Business—Information about our Executive Officers.

Code of Ethics

We maintain a Code of Ethics for the Chief Executive Officer and Senior Financial Officers applicable to our principal 
executive  officer,  principal  financial  officer,  principal  accounting  officer  or  controller  and  other  persons  performing  similar 
functions. To view this code of ethics free of charge, please visit our website at www.amgen.com. (The website address is not 
intended to function as a hyperlink, and the information contained in our website is not intended to be a part of this filing.) We 
intend  to  satisfy  the  disclosure  requirements  under  Item  5.05  of  Form  8-K  regarding  an  amendment  to  or  a  waiver  from  a 
provision of this code of ethics, if any, by posting such information on our website as set forth above.

Item 11.

EXECUTIVE COMPENSATION

Information  about  director  and  executive  compensation  is  incorporated  by  reference  from  the  sections  entitled 
COMPENSATION  DISCUSSION  AND  ANALYSIS,  EXECUTIVE  COMPENSATION  TABLES,  DIRECTOR 
COMPENSATION and CORPORATE GOVERNANCE—Pay Ratio in our Proxy Statement. Information about compensation 
committee matters is incorporated by reference from the sections entitled CORPORATE GOVERNANCE—Compensation and 
Management  Development  Committee  and  CORPORATE  GOVERNANCE—Compensation  Committee  Report  in  our  Proxy 
Statement.

85

Item 12.

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND 
RELATED STOCKHOLDER MATTERS

Securities Authorized for Issuance Under Existing Equity Compensation Plans

Information  about  securities  authorized  for  issuance  under  existing  equity  compensation  plans  is  incorporated  by 
reference  from  the  section  entitled  SECURITIES  AUTHORIZED  FOR  ISSUANCE  UNDER  EXISTING  EQUITY 
COMPENSATION PLANS in our Proxy Statement.

Security Ownership of Directors and Executive Officers and Certain Beneficial Owners

Information about security ownership of certain beneficial owners and management is incorporated by reference from the 
sections entitled SECURITY OWNERSHIP OF DIRECTORS AND EXECUTIVE OFFICERS and SECURITY OWNERSHIP 
OF CERTAIN BENEFICIAL OWNERS in our Proxy Statement.

Item 13.

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR INDEPENDENCE

Information  about  certain  relationships  and  related  transactions  and  director  independence  is  incorporated  by  reference 
the  sections  entitled  CERTAIN  RELATIONSHIPS  AND  RELATED  TRANSACTIONS  and  CORPORATE 

from 
GOVERNANCE—Director Independence in our Proxy Statement.

Item 14.

PRINCIPAL ACCOUNTANT FEES AND SERVICES

Information  about  the  fees  for  professional  services  rendered  by  our  independent  registered  public  accountants  is 
incorporated  by  reference  from  the  section  entitled  AUDIT  MATTERS—Independent  Registered  Public  Accountants  in  our 
Proxy Statement.

86

PART IV

Item 15.

EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a)1.

Index to Financial Statements

The following Consolidated Financial Statements are included herein:

Report of Independent Registered Public Accounting Firm (PCAOB ID: 42)

Consolidated Statements of Income for each of the three years in the period ended December 31, 2023

Consolidated Statements of Comprehensive Income for each of the three years in the period ended 

December 31, 2023

Consolidated Balance Sheets as of December 31, 2023 and 2022

Consolidated Statements of Stockholders’ Equity for each of the three years in the period ended 

December 31, 2023

Consolidated Statements of Cash Flows for each of the three years in the period ended December 31, 

2023

Notes to Consolidated Financial Statements

(a)2.

Index to Financial Statement Schedules

The following Schedule is filed as part of this Annual Report on Form 10-K:

Schedule II. Valuation and Qualifying Accounts

Page
number
F-1

F-5

F-6

F-7

F-8

F-9

F-10

Page
number
F-57

All  other  schedules  are  omitted  because  they  are  not  applicable,  not  required  or  because  the  required  information  is 

included in the consolidated financial statements or notes thereto.

(a)3.

Exhibits

Exhibit No.
2.1

Description
Asset Purchase Agreement, dated August 25, 2019, by and between Amgen Inc. and Celgene Corporation. 
(Filed as an exhibit to Form 8-K on August 26, 2019 and incorporated herein by reference.)

2.1.1

2.1.2

2.2

2.3

2.4

Amendment No. 1 to the Asset Purchase Agreement, dated October 17, 2019, by and between Amgen Inc. 
and Celgene Corporation. (Filed as an exhibit to Form 8-K on October 17, 2019 and incorporated herein by 
reference.)

Amendment No. 2 to the Asset Purchase Agreement, dated October 17, 2019, by and between Amgen Inc. 
and  Celgene  Corporation.  (Filed  as  an  exhibit  to  Form  10-K  for  the  year  ended  December  31,  2019  on 
February 12, 2020 and incorporated herein by reference.)

Letter Agreement, dated November 21, 2019, by and between Amgen Inc. and the parties named therein re: 
Treatment  of  Certain  Product  Inventory  in  connection  with  Amgen’s  acquisition  of  Otezla.  (Filed  as  an 
exhibit to Form 10-K for the year ended December 31, 2019 on February 12, 2020 and incorporated herein 
by reference.)

Irrevocable  Guarantee,  dated  August  25,  2019,  by  and  between  Amgen  Inc.  and  Bristol-Myers  Squibb 
Company. (Filed as an exhibit to Form 8-K on August 26, 2019 and incorporated herein by reference.)

Agreement  and  Plan  of  Merger,  dated  July  27,  2021,  by  and  among  Amgen  Inc.,  Teneobio,  Inc.,  Tuxedo 
Merger Sub, Inc., and Fortis Advisors LLC. (portions of the exhibit have been omitted because they are both 
(i) not material and (ii) is the type of information that the Company treats as private or confidential)(Filed as 
an exhibit to Form 10-Q for the quarter ended September 30, 2021 on November 3, 2021 and incorporated 
herein by reference.)

87

 
 
Exhibit No.
2.5

Description
Agreement  and  Plan  of  Merger,  dated  as  of  August  3,  2022,  among  ChemoCentryx,  Inc.,  Amgen  Inc.  and 
Carnation Merger Sub, Inc. (Filed as an exhibit to Form 8-K on August 4, 2022 and incorporated herein by 
reference.)

2.6

2.7

3.1

3.2

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.10

4.11

4.12

4.13

4.14

4.15

Transaction Agreement, dated as of December 11, 2022, by and among Amgen Inc., Pillartree Limited and 
Horizon Therapeutics plc. (Filed as an exhibit to Form 8-K on December 12, 2022 and incorporated herein 
by reference.)

Appendix 3 to the Rule 2.7 Announcement, dated as of December 12, 2022 (Conditions Appendix). (Filed as 
an exhibit to Form 8-K on December 12, 2022 and incorporated herein by reference.)

Restated  Certificate  of  Incorporation  of  Amgen  Inc.  (As  Restated  March  6,  2013.)  (Filed  as  an  exhibit  to 
Form 10-Q for the quarter ended March 31, 2013 on May 3, 2013 and incorporated herein by reference.)

Amended and Restated Bylaws of Amgen Inc. (As Amended and Restated February 15, 2016.) (Filed as an 
exhibit to Form 8-K on February 17, 2016 and incorporated herein by reference.)

Form  of  stock  certificate  for  the  common  stock,  par  value  $.0001  of  the  Company.  (Filed  as  an  exhibit  to 
Form 10-Q for the quarter ended March 31, 1997 on May 14, 1997 and incorporated herein by reference.)

Form of Indenture, dated January 1, 1992. (Filed as an exhibit to Form S-3 Registration Statement filed on 
December 19, 1991 and incorporated herein by reference.)

Agreement  of  Resignation,  Appointment  and  Acceptance  dated  February  15,  2008.  (Filed  as  an  exhibit  to 
Form  10-K  for  the  year  ended  December  31,  2007  on  February  28,  2008  and  incorporated  herein  by 
reference.)

First Supplemental Indenture, dated February 26, 1997. (Filed as an exhibit to Form 8-K on March 14, 1997 
and incorporated herein by reference.)

8-1/8% Debentures due April 1, 2097. (Filed as an exhibit to Form 8-K on April 8, 1997 and incorporated 
herein by reference.)

Officer’s Certificate of Amgen Inc., dated April 8, 1997, establishing a series of securities entitled “8 1/8% 
Debentures due April 1, 2097.” (Filed as an exhibit to Form 8-K on April 8, 1997 and incorporated herein by 
reference.)

Indenture, dated August 4, 2003. (Filed as an exhibit to Form S-3 Registration Statement on August 4, 2003 
and incorporated herein by reference.)

Corporate  Commercial  Paper  -  Master  Note  between  and  among  Amgen  Inc.,  as  Issuer,  Cede  &  Co.,  as 
Nominee  of  The  Depository  Trust  Company,  and  Citibank,  N.A.,  as  Paying  Agent.  (Filed  as  an  exhibit  to 
Form 10-Q for the quarter ended March 31, 1998 on May 13, 1998 and incorporated herein by reference.)

Officers’ Certificate of Amgen Inc., dated May 30, 2007, including form of the Company’s 6.375% Senior 
Notes due 2037. (Filed as an exhibit to Form 8-K on May 30, 2007 and incorporated herein by reference.)

Officers’  Certificate  of  Amgen  Inc.,  dated  May  23,  2008,  including  form  of  the  Company’s  6.90%  Senior 
Notes due 2038. (Filed as exhibit to Form 8-K on May 23, 2008 and incorporated herein by reference.)

Officers’ Certificate of Amgen Inc., dated January 16, 2009, including form of the Company’s 6.40% Senior 
Notes due 2039. (Filed as exhibit to Form 8-K on January 16, 2009 and incorporated herein by reference.)

Officers’ Certificate of Amgen Inc., dated March 12, 2010, including form of the Company’s 5.75% Senior 
Notes due 2040. (Filed as exhibit to Form 8-K on March 12, 2010 and incorporated herein by reference.)

Officers’  Certificate  of  Amgen  Inc.,  dated  September  16,  2010,  including  form  of  the  Company’s  4.95% 
Senior Notes due 2041. (Filed as an exhibit to Form 8-K on September 17, 2010 and incorporated herein by 
reference.)

Officers’  Certificate  of  Amgen  Inc.,  dated  June  30,  2011,  including  form  of  the  Company’s  5.65%  Senior 
Notes due 2042. (Filed as an exhibit to Form 8-K on June 30, 2011 and incorporated herein by reference.)

Officers’  Certificate  of  Amgen  Inc.,  dated  November  10,  2011,  including  form  of  the  Company’s  5.15% 
Senior Notes due 2041. (Filed as an exhibit to Form 8-K on November 10, 2011 and incorporated herein by 
reference.)

88

Exhibit No.
4.16

Description
Officers’  Certificate  of  Amgen  Inc.,  dated  December  5,  2011,  including  form  of  the  Company’s  5.50% 
Senior Notes due 2026. (Filed as an exhibit to Form 8-K on December 5, 2011 and incorporated herein by 
reference.)

4.17

4.18

4.19

4.20

4.21

4.22

4.23

4.24

4.25

4.26

4.27

4.28

4.29

4.30

4.31

4.32

Officers’ Certificate of Amgen Inc., dated May 15, 2012, including form of the Company’s 5.375% Senior 
Notes due 2043. (Filed as an exhibit to Form 8-K on May 15, 2012 and incorporated herein by reference.)

Officers’  Certificate  of  Amgen  Inc.,  dated  September  13,  2012,  including  form  of  the  Company’s  4.000% 
Senior Notes due 2029. (Filed as an exhibit to Form 8-K on September 13, 2012 and incorporated herein by 
reference.)

Indenture, dated May 22, 2014, between Amgen Inc. and The Bank of New York Mellon Trust Company, 
N.A., as Trustee. (Filed as an exhibit to Form 8-K on May 22, 2014 and incorporated herein by reference.)

Officers’ Certificate of Amgen Inc., dated May 22, 2014, including form of the Company’s 3.625% Senior 
Notes due 2024. (Filed as an exhibit to Form 8-K on May 22, 2014 and incorporated herein by reference.)

Officer’s Certificate of Amgen Inc., dated May 1, 2015, including forms of the Company’s 3.125% Senior 
Notes due 2025 and 4.400% Senior Notes due 2045. (Filed as an exhibit on Form 8-K on May 1, 2015 and 
incorporated herein by reference.)

Officer’s Certificate of Amgen Inc., dated as of February 25, 2016, including form of the Company’s 2.000% 
Senior Notes due 2026. (Filed as an exhibit on Form 8-K on February 26, 2016 and incorporated herein by 
reference.)

Officer’s Certificate of Amgen Inc., dated as of June 14, 2016, including forms of the Company’s 4.563% 
Senior  Notes  due  2048  and  4.663%  Senior  Notes  due  2051.  (Filed  as  an  exhibit  to  Form  8-K  on  June  14, 
2016 and incorporated herein by reference.)

Officer’s Certificate of Amgen Inc., dated as of August 19, 2016, including forms of the Company’s 2.600% 
Senior  Notes  due  2026.  (Filed  as  an  exhibit  to  Form  8-K  on  August  19,  2016  and  incorporated  herein  by 
reference.)

Officer’s Certificate of Amgen Inc., dated as of November 2, 2017, including in the form of the Company’s 
3.200%  Senior  Notes  due  2027.  (Filed  as  an  exhibit  to  Form  8-K  on  November  2,  2017  and  incorporated 
herein by reference.)

Officer’s  Certificate  of  Amgen  Inc.,  dated  as  of  February  21,  2020,  including  forms  of  the  Company’s 
1.900%  Senior  Notes  due  2025,  2.200%  Senior  Notes  due  2027,  2.450%  Senior  Notes  due  2030,  3.150% 
Senior Notes due 2040 and 3.375% Senior Notes due 2050. (Filed as an exhibit to Form 8-K on February 21, 
2020 and incorporated herein by reference.)

Officer’s  Certificate  of  Amgen  Inc.,  dated  as  of  May  6,  2020,  including  form  of  the  Company’s  2.300% 
Senior  Notes  due  2031.  (Filed  as  an  exhibit  to  Form  8-K  on  May  6,  2020  and  incorporated  herein  by 
reference.)

Officer’s Certificate of Amgen Inc., dated as of August 17, 2020, including forms of the Company’s 2.770% 
Senior  Notes  due  2053.  (Filed  as  an  exhibit  to  Form  8-K  on  August  18,  2020  and  incorporated  herein  by 
reference.) 

Officer’s Certificate of Amgen Inc., dated as of August 9, 2021, including forms of the Company’s 1.650% 
Senior Notes due 2028, 2.000% Senior Notes due 2032, 2.800% Senior Notes due 2041 and 3.000% Senior 
Notes due 2052. (Filed as an exhibit to Form 8-K on August 9, 2021 and incorporated herein by reference.)

Officer’s  Certificate  of  Amgen  Inc.,  dated  as  of  February  22,  2022,  including  forms  of  the  Company’s 
3.000% Senior Notes due 2029, 3.350% Senior Notes due 2032, 4.200% Senior Notes due 2052 and 4.400% 
Senior Notes due 2062. (Filed as an exhibit to Form 8-K on February 22, 2022 and incorporated herein by 
reference.)

Officer’s Certificate of Amgen Inc., dated as of August 18, 2022, including forms of the Company’s 4.050% 
Senior  Notes  due  2029,  4.200%  Senior  Notes  due  2033  and  4.875%  Senior  Notes  due  2053.  (Filed  as  an 
exhibit to Form 8-K on August 18, 2022 and incorporated herein by reference.)

Officer’s Certificate of the Company, dated as of March 2, 2023, including forms of the Company’s 5.250% 
Senior  Notes  due  2025,  5.507%  Senior  Notes  due  2026,  5.150%  Senior  Notes  due  2028,  5.250%  Senior 
Notes due 2030, 5.250% Senior Notes due 2033, 5.600% Senior Notes due 2043, 5.650% Senior Notes due 
2053  and  5.750%  Senior  Notes  due  2063.  (Filed  as  an  exhibit  to  Form  8-K  on  March  2,  2023  and 
incorporated herein by reference.)

89

Exhibit No.

Description

4.33*

10.1+

10.1.1+

10.1.2+

10.2+*

10.3+*

10.4+

10.5+*

10.6+*

10.7+

10.8+

10.9+

10.9.1+

10.9.2+

10.9.3+

10.9.4+

Description of Amgen Inc.’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 
1934.

Amgen  Inc.  Amended  and  Restated  2009  Equity  Incentive  Plan.  (Filed  as  Appendix  C  to  the  Definitive 
Proxy Statement on Schedule 14A on April 8, 2013 and incorporated herein by reference.)

First  Amendment  to  Amgen  Inc.  Amended  and  Restated  2009  Equity  Incentive  Plan,  effective  March  4, 
2015.  (Filed  as  an  exhibit  to  Form  10-Q  for  the  quarter  ended  March  31,  2015  on  April  27,  2015  and 
incorporated herein by reference.)

Second Amendment to Amgen Inc. Amended and Restated 2009 Equity Incentive Plan, effective March 2, 
2016.  (Filed  as  an  exhibit  to  Form  10-Q  for  the  quarter  ended  March  31,  2016  on  May  2,  2016  and 
incorporated herein by reference.)

Form of Grant of Stock Option Agreement for the Amgen Inc. Amended and Restated 2009 Equity Incentive 
Plan. (As Amended and Restated on December 11, 2023.)

Form of Restricted Stock Unit Agreement for the Amgen Inc. Amended and Restated 2009 Equity Incentive 
Plan. (As Amended and Restated on December 11, 2023.)

Amgen Inc. 2009 Performance Award Program. (As Amended on December 12, 2017.) (Filed as an exhibit 
to  Form  10-K  for  the  year  ended  December  31,  2017  on  February  13,  2018  and  incorporated  herein  by 
reference.)

Form of Performance Unit Agreement for the Amgen Inc. 2009 Performance Award Program. (As Amended 
and Reinstated on December 11, 2023.)

Amgen Inc. 2009 Director Equity Incentive Program. (As Amended and Restated on October 24, 2023.) 

Form of Restricted Stock Unit Agreement for the Amgen Inc. 2009 Director Equity Incentive Program. (As 
Amended on December 11, 2019.) (Filed as an exhibit to Form 10-K for the year ended December 31, 2019 
on February 12, 2020 and incorporated herein by reference.)

Form  of  Cash-Settled  Restricted  Stock  Unit  Agreement  for  the  Amgen  2009  Director  Equity  Incentive 
Program.  (As  Amended  on  December  11,  2019.)  (Filed  as  an  exhibit  to  Form  10-K  for  the  year  ended 
December 31, 2019 on February 12, 2020 and incorporated herein by reference.)

Amgen Inc. Supplemental Retirement Plan. (As Amended and Restated effective October 16, 2013.) (Filed 
as an exhibit to Form 10-K for the year ended December 31, 2013 on February 24, 2014 and incorporated 
herein by reference.)

First Amendment to the Amgen Inc. Supplemental Retirement Plan, effective October 14, 2016. (Filed as an 
exhibit to Form 10-Q for the quarter ended September 30, 2016 on October 28, 2016 and incorporated herein 
by reference.)

Second Amendment to the Amgen Inc. Supplemental Retirement Plan, effective October 23, 2019. (Filed as 
an  exhibit  to  Form  10-K  for  the  year  ended  December  31,  2019  on  February  12,  2020  and  incorporated 
herein by reference.)

Third Amendment to the Amgen Inc. Supplemental Retirement Plan, effective October 20, 2021. (Filed as an 
exhibit to Form 10-K for the year ended December 31, 2021 on February 16, 2022 and incorporated herein 
by reference.)

Fourth Amendment to the Amgen Inc. Supplemental Retirement Plan, effective October 20, 2022. (Filed as 
an exhibit to Form 10-K for the year ended December 31, 2022 on February 9, 2023 and incorporated herein 
by reference.)

10.9.5+*

Fifth Amendment to the Amgen Inc. Supplemental Retirement Plan, effective January 1, 2024.

10.10+

10.11+

Amended  and  Restated  Amgen  Change  of  Control  Severance  Plan.  (As  Amended  and  Restated  effective 
December 9, 2010 and subsequently amended effective March 2, 2011.) (Filed as an exhibit to Form 10-Q 
for the quarter ended March 31, 2011 on May 10, 2011 and incorporated herein by reference.)

Amgen  Inc.  Executive  Incentive  Plan.  (As  Amended  and  Restated  effective  January  1,  2022.)  (Filed  as  an 
exhibit to Form 10-Q for the quarter ended March 31, 2022 on April 28, 2022 and incorporated herein by 
reference.)

90

Exhibit No.
10.12+

10.12.1+

10.12.2+

10.12.3+

Description
Amgen Nonqualified Deferred Compensation Plan. (As Amended and Restated effective October 16, 2013.) 
(Filed  as  an  exhibit  to  Form  10-K  for  the  year  ended  December  31,  2013  on  February  24,  2014  and 
incorporated herein by reference.)

First  Amendment  to  the  Amgen  Nonqualified  Deferred  Compensation  Plan,  effective  October  14,  2016. 
(Filed  as  an  exhibit  to  Form  10-Q  for  the  quarter  ended  September  30,  2016  on  October  28,  2016  and 
incorporated herein by reference.)

Second  Amendment  to  the  Amgen  Nonqualified  Deferred  Compensation  Plan,  effective  January  1,  2020. 
(Filed  as  an  exhibit  to  Form  10-K  for  the  year  ended  December  31,  2019  on  February  12,  2020  and 
incorporated herein by reference.)

Third  Amendment  to  the  Amgen  Nonqualified  Deferred  Compensation  Plan,  effective  January  1,  2022. 
(Filed  as  an  exhibit  to  Form  10-K  for  the  year  ended  December  31,  2021  on  February  16,  2022  and 
incorporated herein by reference.)

10.12.4+*

Fourth Amendment to the Amgen Nonqualified Deferred Compensation Plan, effective January 1, 2024.

10.13+

Aircraft  Time  Sharing  Agreement,  dated  December  3,  2021,  by  and  between  Amgen  Inc.  and  Robert  A. 
Bradway. (Filed as an exhibit to Form 10-K for the year ended December 31, 2021 on February 16, 2022 and 
incorporated herein by reference.)

10.14+*

Agreement between Amgen Inc. and James Bradner, dated December 13, 2023.

10.15

10.16

10.17*

Term Loan Credit Agreement, dated as of December 22, 2022, by and among Amgen Inc., Citibank, N.A., as 
administrative agent, Bank of America, N.A., as syndication agent, Citibank, N.A., Bank of America, N.A., 
Goldman  Sachs  Bank  USA  and  Mizuho  Bank,  Ltd.,  as  lead  arrangers  and  book  runners,  Goldman  Sachs 
Bank USA and Mizuho Bank, Ltd. as documentation agents, and the other banks party thereto. (Filed as an 
exhibit to Form 8-K on December 22, 2022 and incorporated herein by reference.)

Third Amended and Restated Credit Agreement, dated as of March 9, 2023, among Amgen Inc., the Banks 
therein  named,  Citibank,  N.A.,  as  Administrative  Agent,  and  JPMorgan  Chase  Bank,  N.A.,  as  Syndication 
Agent. (Filed as an exhibit to Form 8-K on March 9, 2023 and incorporated herein by reference.)

Collaboration and License Agreement between Amgen Inc. and Celltech R&D Limited dated May 10, 2002 
(portions  of  the  exhibit  have  been  omitted  because  they  are  both  (i)  not  material  and  (ii)  is  the  type  of 
information  that  the  Company  treats  as  private  or  confidential.)  and  Amendment  No.  1,  effective  June  9, 
2003, to Collaboration and License Agreement between Amgen Inc. and Celltech R&D Limited (portions of 
the exhibit have been omitted because they are both (i) not material and (ii) is the type of information that the 
Company treats as private or confidential.)

10.17.1*

Amendment No. 2 to Collaboration and License Agreement, effective November 14, 2016, between Amgen 
Inc.  and  Celltech  R&D  Limited.  (portions  of  the  exhibit  have  been  omitted  because  they  are  both  (i)  not 
material and (ii) is the type of information that the Company treats as private or confidential.)

10.18

10.19

10.19.1

Letter  Agreement,  dated  June  25,  2019,  by  and  between  Amgen  Inc.  and  UCB  Celltech  (portions  of  the 
exhibit have been omitted because they are both (i) not material and (ii) would be competitively harmful if 
publicly disclosed). (Filed as an exhibit to Form 10-Q for the quarter ended June 30, 2019 on July 31, 2019 
and incorporated herein by reference.)

Collaboration  Agreement,  dated  October  31,  2019,  by  and  between  Amgen  Inc.  and  BeiGene  Switzerland 
GmbH, a wholly-owned subsidiary of BeiGene, Ltd. (portions of the exhibit have been omitted because they 
are both (i) not material and (ii) would be competitively harmful if publicly disclosed). (Filed as an exhibit to 
Form  10-K  for  the  year  ended  December  31,  2019  on  February  12,  2020  and  incorporated  herein  by 
reference.)

First  Amendment  to  Collaboration  Agreement,  dated  April  20,  2022,  by  and  between  Amgen  Inc.  and 
BeiGene Switzerland GmbH, and BeiGene, Ltd. (portions of the exhibit have been omitted because they are 
both (i) not material and (ii) is the type of information that the Company treats as private or confidential.) 
(Filed as an exhibit to Form 10-Q for the quarter ended June 30, 2022 on August 5, 2022 and incorporated 
herein by reference.)

91

Exhibit No.
10.19.2

Description
Second  Amendment  to  Collaboration  Agreement,  entered  into  as  of  February  26,  2023,  by  and  between 
Amgen Inc. and BeiGene Switzerland GmbH, and BeiGene, Ltd. (portions of the exhibit have been omitted 
because they are both (i) not material and (ii) is the type of information that the Company treats as private or 
confidential.) (Filed as an exhibit to Form 10-Q for the quarter ended March 31, 2023 on April 28, 2023 and 
incorporated herein by reference.)

10.20

10.21

10.21.1

10.21.2

10.21.3

10.22

10.22.1

10.22.2

10.22.3

10.22.4

10.22.5*

10.23

Guarantee, dated as of October 31, 2019, made by and among BeiGene, Ltd. and Amgen Inc. (Filed as an 
exhibit to Form 10-K for the year ended December 31, 2019 on February 12, 2020 and incorporated herein 
by reference.)

Share Purchase Agreement, dated October 31, 2019, by and between Amgen Inc. and BeiGene, Ltd. (portions 
of  the  exhibit  have  been  omitted  because  they  are  both  (i)  not  material  and  (ii)  would  be  competitively 
harmful  if  publicly  disclosed).  (Filed  as  an  exhibit  to  Schedule  13D  on  January  8,  2020  and  incorporated 
herein by reference.)

Amendment No. 1 to Share Purchase Agreement, dated December 6, 2019, by and among BeiGene, Ltd. and 
Amgen Inc. (Filed as an exhibit to Schedule 13D on January 8, 2020 and incorporated herein by reference.)

Restated  Amendment  No.  2  to  Share  Purchase  Agreement,  dated  September  24,  2020,  by  and  among 
BeiGene, Ltd. and Amgen Inc. (Filed as an exhibit to Form 10-Q for the quarter ended September 30, 2020 
on October 29, 2020 and incorporated herein by reference.)

Amendment No. 3 to Share Purchase Agreement, dated January 30, 2023, by and among BeiGene, Ltd. and 
Amgen Inc. (Filed as an exhibit to Form 8-K on January 31, 2023 and incorporated herein by reference.)

Collaboration Agreement dated March 30, 2012 by and between Amgen Inc. and AstraZeneca Collaboration 
Ventures, LLC, a wholly owned subsidiary of AstraZeneca Pharmaceuticals LP (portions of the exhibit have 
been omitted because they are both (i) not material and (ii) is the type of information that the Company treats 
as private or confidential.) (Filed as an exhibit to Form 10-Q for the quarter ended June 30, 2022 on August 
5, 2022 and incorporated herein by reference.)

Amendment  No.  1  to  the  Collaboration  Agreement,  dated  October  1,  2014,  by  and  among  Amgen  Inc., 
AstraZeneca Collaboration Ventures, LLC and AstraZeneca Pharmaceuticals LP (portions of the exhibit have 
been omitted because they are both (i) not material and (ii) is the type of information that the Company treats 
as private or confidential.) (Filed as an exhibit to Form 10-Q for the quarter ended June 30, 2022 on August 
5, 2022 and incorporated herein by reference.)

Amendment  Nos.  2  through  6  to  the  March  30,  2012  Collaboration  Agreement  between  Amgen  Inc.  and 
AstraZeneca Collaboration Ventures, LLC, dated May 2 and 27 and October 2, 2016, January 31, 2018, and 
May 15, 2020, respectively (portions of the exhibit have been omitted because they are both (i) not material 
and  (ii)  would  be  competitively  harmful  if  publicly  disclosed.)  (Filed  as  an  exhibit  to  Form  10-Q  for  the 
quarter ended June 30, 2020 on July 29, 2020 and incorporated herein by reference.)

Amendment No. 7 to the Collaboration Agreement, dated December 17, 2020, by and between Amgen Inc. 
and AstraZeneca Collaboration Ventures, LLC (portions of the exhibit have been omitted because they are 
both (i) not material and (ii) would be competitively harmful if publicly disclosed.) (Filed as an exhibit to 
Form  10-K  for  the  year  ended  December  31,  2020  on  February  9,  2021  and  incorporated  herein  by 
reference.)

Amendment No. 8 to the Collaboration Agreement, dated November 19, 2021, by and between Amgen Inc. 
and AstraZeneca Collaboration Ventures, LLC (portions of the exhibit have been omitted because they are 
both (i) not material and (ii) is the type of information that the Company treats as private or confidential.) 
(Filed  as  an  exhibit  to  Form  10-K  for  the  year  ended  December  31,  2021  on  February  16,  2022  and 
incorporated herein by reference.)

Letter Agreement Regarding the Collaboration Agreement, dated as of December 1, 2023, by and between 
Amgen  Inc.  and  AstraZeneca  Collaboration  Ventures,  LLC  (portions  of  the  exhibit  have  been  omitted 
because they are both (i) not material and (ii) is the type of information that the Company treats as private or 
confidential.)

License  and  Collaboration  Agreement,  dated  June  1,  2021,  by  and  between  Amgen  Inc.  and  Kyowa  Kirin 
Co., Ltd. (portions of the exhibit have been omitted because they are both (i) not material and (ii) is the type 
of information that the Company treats as private or confidential). (Filed as an exhibit to Form 10-Q for the 
quarter ended June 30, 2021 on August 4, 2021 and incorporated herein by reference.)

21*

Subsidiaries of the Company.

92

Exhibit No.
23

Description
Consent of the Independent Registered Public Accounting Firm. The consent is set forth on page 95 of this 
Annual Report on the 10-K.

24

31*

32**

97*

Power of Attorney. The Power of Attorney is set forth on page 96 of this Annual Report on Form 10-K.

Rule 13a-14(a) Certifications.

Section 1350 Certifications.

Policy Relating to Recovery of Erroneously Awarded Compensation.

101.INS

Inline XBRL Instance Document - The instance document does not appear in the interactive data file because 
its XBRL tags are embedded within the Inline XBRL document.

101.SCH*

Inline XBRL Taxonomy Extension Schema Document.

101.CAL*

Inline XBRL Taxonomy Extension Calculation Linkbase Document.

101.DEF*

Inline XBRL Taxonomy Extension Definition Linkbase Document.

101.LAB*

Inline XBRL Taxonomy Extension Label Linkbase Document.

101.PRE*

Inline XBRL Taxonomy Extension Presentation Linkbase Document.

104

Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

____________________________
(* = filed herewith)
(** = furnished herewith and not “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended)
(+ = management contract or compensatory plan or arrangement)

Item 16.

FORM 10-K SUMMARY

Not applicable.

93

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Annual Report to 

be signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

AMGEN INC.
(Registrant)

Date: February 14, 2024

By:

/s/    PETER H. GRIFFITH
Peter H. Griffith

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

94

 
 
 
 
EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

•

•

•

•

•

•

•

•

Registration Statement (Form S-3 No. 333-269670) of Amgen Inc.,

Registration Statement (Form S-8 No. 333-159377) pertaining to the Amgen Inc. Amended and Restated 2009 Equity 
Incentive Plan, 

Registration  Statement  (Form  S-8  No.  33-39183)  pertaining  to  the  Amgen  Inc.  Amended  and  Restated  Employee 
Stock Purchase Plan, 

Registration Statements (Form S-8 Nos. 33-39104, 333-144581 and 333-216719) pertaining to the Amgen Retirement 
and Savings Plan,

Registration Statements (Form S-8 Nos. 33-47605, 333-144580 and 333-216715) pertaining to The Retirement and 
Savings  Plan  for  Amgen  Manufacturing,  Limited  (formerly  known  as  the  Retirement  and  Savings  Plan  for  Amgen 
Manufacturing, Inc.), 

Registration  Statements  (Form  S-8  Nos.  333-81284,  333-177868,  333-216723  and  333-260723)  pertaining  to  the 
Amgen Nonqualified Deferred Compensation Plan,

Registration Statements (Form S-8 Nos. 333-176240 and 333-260724) pertaining to the Amgen Profit Sharing Plan 
for Employees in Ireland, and

Registration Statement (Form S-8 No. 333-274900) pertaining to the Horizon Therapeutics Public Limited Company 
Amended  and  Restated  2014  Equity  Incentive  Plan,  Horizon  Therapeutics  Public  Limited  Company  Amended  and 
Restated  2018  Equity  Incentive  Plan  and  2018  Restricted  Stock  Unit  Award  Sub-Plan,  and  Horizon  Therapeutics 
Public Limited Company Amended and Restated 2020 Equity Incentive Plan and 2020 Restricted Stock Unit Award 
Sub-Plan;

of  our  reports  dated  February  14,  2024,  with  respect  to  the  consolidated  financial  statements  of  Amgen  Inc.  and  the 
effectiveness of internal control over financial reporting of Amgen Inc. included in this Annual Report (Form 10-K) of 
Amgen Inc. for the year ended December 31, 2023.

Los Angeles, California
February 14, 2024

/s/ Ernst & Young LLP

95

POWER OF ATTORNEY

EXHIBIT 24

KNOW ALL MEN AND WOMEN BY THESE PRESENTS, that each person whose signature appears below constitutes 
and appoints Robert A. Bradway, Peter H. Griffith and Jonathan P. Graham, or any of them, his or her attorney-in-fact, each 
with  the  power  of  substitution  and  re-substitution,  for  him  or  her  in  any  and  all  capacities,  to  sign  any  amendments  to  this 
Report,  and  to  file  the  same,  with  exhibits  thereto  and  other  documents  in  connection  therewith,  with  the  Securities  and 
Exchange  Commission,  hereby  ratifying  and  confirming  all  that  each  of  said  attorneys-in-fact,  or  his  or  her  substitute  or 
substitutes, may do or cause to be done by virtue hereof.

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:

Signature

Title

/S/    ROBERT A. BRADWAY
Robert A. Bradway

/S/    PETER H. GRIFFITH
Peter H. Griffith

/S/    MATTHEW C. BUSCH
Matthew C. Busch

/S/    WANDA M. AUSTIN
Wanda M. Austin

/S/    MICHAEL V. DRAKE
Michael V. Drake

/S/    BRIAN J. DRUKER
Brian J. Druker

/S/    ROBERT A. ECKERT
Robert A. Eckert

/S/    GREG C. GARLAND
Greg C. Garland

/S/    CHARLES M. HOLLEY, JR.
Charles M. Holley, Jr.

/S/    S. OMAR ISHRAK
S. Omar Ishrak

/S/    TYLER JACKS
Tyler Jacks

/S/    ELLEN J. KULLMAN
Ellen J. Kullman

/S/    AMY E. MILES
Amy E. Miles

/S/    RONALD D. SUGAR
Ronald D. Sugar

/S/    R. SANDERS WILLIAMS
R. Sanders Williams

Chairman of the Board, Chief Executive Officer
and President, and Director
(Principal Executive Officer)

Executive Vice President and
Chief Financial Officer
(Principal Financial Officer)

Vice President, Finance and
Chief Accounting Officer
(Principal Accounting Officer)

Director

Director

Director

Director

Director

Director

Director

Director

Director

Director

Director

Director

96

Date

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

2/14/2024

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Amgen Inc.

Opinion on the Financial Statements 

We have audited the accompanying consolidated balance sheets of Amgen Inc. (the Company) as of December 31, 2023 and 
2022, the related consolidated statements of income, comprehensive income, stockholders’ equity and cash flows for each of 
the three years in the period ended December 31, 2023, and the related notes and the financial statement schedule listed in the 
Index  at  Item  15(a)2  (collectively  referred  to  as  the  “consolidated  financial  statements”).  In  our  opinion,  the  consolidated 
financial  statements  present  fairly,  in  all  material  respects,  the  financial  position  of  the  Company  at  December  31,  2023  and 
2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in 
conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) 
(PCAOB), the Company’s internal control over financial reporting as of December 31, 2023, based on criteria established in 
Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission 
(2013 framework) and our report dated February 14, 2024 expressed an unqualified opinion thereon.

Basis for Opinion 

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on 
the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are 
required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable 
rules and regulations of the Securities and Exchange Commission and the PCAOB. 

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the 
audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to 
error  or  fraud.  Our  audits  included  performing  procedures  to  assess  the  risks  of  material  misstatement  of  the  financial 
statements,  whether  due  to  error  or  fraud,  and  performing  procedures  that  respond  to  those  risks.  Such  procedures  included 
examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included 
evaluating  the  accounting  principles  used  and  significant  estimates  made  by  management,  as  well  as  evaluating  the  overall 
presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current period audit of the financial statements that 
were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that 
are  material  to  the  financial  statements  and  (2)  involved  our  especially  challenging,  subjective  or  complex  judgments.  The 
communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as 
a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit 
matters or on the accounts or disclosures to which they relate.

F-1

Description of the 
Matter

How We 
Addressed the 
Matter in Our 
Audit

Sales deductions
As  of  December  31,  2023,  the  Company  recorded  accrued  sales  deductions  of  $7.3  billion.  As 
described in Note 1 to the financial statements under the caption “Product sales and sales deductions,” 
revenues  from  product  sales  are  recognized  net  of  accruals  for  estimated  rebates,  wholesaler 
chargebacks,  discounts  and  other  deductions  (collectively  sales  deductions),  which  are  established  at 
the time of sale.

Auditing  the  estimation  of  sales  deductions,  specifically  estimated  chargebacks,  commercial  rebates, 
and Medicaid rebates related to U.S. product sales, which are netted against product sales, is complex, 
requires significant judgment, and the amounts involved are material to the financial statements taken 
as  a  whole.  Revenue  from  product  sales  is  recognized  upon  transfer  of  control  of  a  product  to  a 
customer, generally upon delivery, and is based on an amount that reflects the consideration to which 
the Company expects to be entitled, which represents an amount that is net of accruals for estimated 
sales  deductions.  The  estimated  sales  deductions  are  based  on  current  contractual  and  statutory 
requirements, market events and trends, internal and external historical data, and forecasted customer 
buying patterns.

We obtained an understanding, evaluated the design and tested the operating effectiveness of internal 
controls over the sales deduction processes. This included testing controls over management’s review 
of significant assumptions and inputs used in the estimate of sales deductions, including actual sales, 
contractual  terms,  historical  experience,  wholesaler  inventory  levels,  demand  data  and  estimated 
patient  population.  We  also  tested  management’s  controls  over  the  accuracy  of  forecasting  demand 
activity as well as the completeness and accuracy of the significant components included in the final 
sales deduction estimates. 

To  test  management’s  estimated  sales  deductions,  we  obtained  management’s  calculations  for  the 
respective estimates and performed the following procedures, among others. We tested management’s 
estimation  process  over  the  determination  of  sales  discount  accruals  by  developing  an  independent 
expectation  of  the  estimated  accrual  balances,  including  comparing  accrual  balances  recorded  by 
management  to  those  implied  by  historical  payment  trends,  evaluating  trends  in  actual  sales  and 
discount accrual balances, confirming terms and conditions for a sample of contracts, testing a sample 
of  credits  issued  and  payments  made  throughout  the  year,  and  agreeing  rates  to  underlying  contract 
terms.

F-2

Description of the 
Matter

Unrecognized tax benefits

As  discussed  in  Notes  1  and  7  to  the  consolidated  financial  statements,  the  Company  operates  in 
various  jurisdictions  in  which  differing  interpretations  of  complex  tax  laws  and  regulations  create 
uncertainty  and  necessitate  the  use  of  significant  judgment  in  the  determination  of  the  Company’s 
unrecognized  tax  benefits,  particularly  in  the  U.S.  federal  tax  jurisdiction  where  the  Company  has 
significant  assets  and  operations.  In  this  regard,  the  Company  uses  significant  judgment  in  (1) 
determining whether a tax position’s technical merits are more-likely-than-not to be sustained and (2) 
measuring  the  amount  of  tax  benefit  that  qualifies  for  recognition.  As  of  December  31,  2023,  the 
Company  accrued  $4.0  billion  of  gross  unrecognized  tax  benefits.  Auditing  the  assessment  of  the 
technical  merits  and  measurement  of  the  Company’s  unrecognized  tax  benefits  is  challenging  due  to 
the high degree of estimation and management judgement, given the ultimate resolution is dependent 
on uncontrollable factors such as the resolution of audit disputes with the IRS.

How We 
Addressed the 
Matter in Our 
Audit

We obtained an understanding, evaluated the design and tested the operating effectiveness of internal 
controls  over  the  Company’s  process  to  assess  the  technical  merits  of  its  tax  positions,  as  well  as 
management’s process to measure the unrecognized tax benefits of those tax positions, particularly in 
regard to matters in dispute with the IRS. This included testing controls over management’s review of 
the inputs, calculations, assumptions and methods selected to measure the amount of tax benefits that 
qualify for recognition.

We involved tax controversy and transfer pricing specialists to assist in assessing the technical merits 
and measurement of certain of the Company’s unrecognized tax benefits. Depending on the nature of 
the  specific  tax  position  and,  as  applicable,  developments  with  the  relevant  tax  authorities,  our 
procedures included obtaining and reviewing the Company’s correspondence with such tax authorities 
and evaluating certain third-party advice to support the Company’s evaluations and recorded positions. 
We evaluated developments in the applicable regulatory environments to assess potential effects on the 
Company’s  recorded  positions.  We  assessed  management’s  consideration  of  current  tax  controversy, 
litigation and tax litigation trends. We analyzed the assumptions and data used by the Company when it 
determined the amount of tax benefits to recognize, including applicable interest and penalties, and we 
tested  the  accuracy  of  those  underlying  calculations.  We  have  also  evaluated  the  Company’s  income 
tax disclosures included in Note 7 in relation to these matters.

F-3

Description of the 
Matter

Valuation of intangible assets acquired in a business combination

As  described  in  Note  3  to  the  financial  statements,  on  October  6,  2023,  the  Company  completed  its 
acquisition  of  Horizon  Therapeutics  plc  (“Horizon”)  (“Horizon  acquisition”).  The  transaction  was 
accounted for as a business combination using the acquisition method of accounting. The acquisition 
date  fair  values  of  acquired  intangible  assets,  primarily  consisted  of  finite-lived  developed-product-
technology rights, inclusive of the TEPEZZA intangible asset. The finite-lived intangible assets were 
valued using a multi-period excess earnings income approach that discounts expected future cash flows 
to present value. 

Auditing  the  acquisition  date  fair  values  of  the  TEPEZZA  finite-lived  developed-product-technology 
rights intangible asset acquired from Horizon was complex due to the significant judgment required in 
estimating  the  fair  value.  In  particular,  the  fair  value  estimate  required  the  use  of  a  valuation 
methodology  that  was  sensitive  to  changes  in  significant  assumptions  (e.g.,  revenue  projections  and 
discount rate), which were affected by expected future market or economic conditions.

How We 
Addressed the 
Matter in Our 
Audit

We evaluated and tested the design and operating effectiveness of the Company’s internal controls over 
the determination of the estimated fair value of the intangible assets. For example, we tested controls 
over  management's  review  of  the  valuation  methodologies  and  the  significant  assumptions  used  to 
develop  the  fair  value  estimate  of  the  TEPEZZA  intangible  asset.  We  also  tested  management's 
controls to validate that the data used in the fair value estimate was complete and accurate.

To  test  the  Company’s  estimated  fair  value  of  the  TEPEZZA  intangible  asset,  our  audit  procedures 
included,  among  others,  evaluating  the  Company’s  selection  of  the  valuation  methodology  and  the 
significant assumptions, with the assistance of a valuation specialist. We also tested the completeness 
and accuracy of the underlying data utilized in the valuation. For example, we compared the TEPEZZA 
revenue  projections  to  analyst  reports,  current  industry  and  market  trends,  historical  results  of  the 
acquired business and to other relevant factors. We also performed sensitivity analyses over significant 
assumptions  to  evaluate  the  impact  that  changes  in  significant  assumptions  would  have  on  the  fair 
value  of  the  TEPEZZA  acquired  intangible  asset.  In  addition,  we  tested  the  estimated  discount  rate 
applied to the TEPEZZA intangible asset value.

We have served as the Company’s auditor since 1980.
Los Angeles, California
February 14, 2024

/s/ Ernst & Young LLP

F-4

AMGEN INC.

CONSOLIDATED STATEMENTS OF INCOME

Years ended December 31, 2023, 2022 and 2021 

(In millions, except per-share data)

2023

2022

2021

$ 

26,910  $ 

24,801  $ 

1,280 

28,190 

1,522 

26,323 

8,451 

4,784 

— 

6,179 

879 

6,406 

4,434 

— 

5,414 

503 

24,297 

1,682 

25,979 

6,454 

4,819 

1,505 

5,368 

194 

20,293 

16,757 

18,340 

7,897 

9,566 

7,639 

(2,875)   

2,833 

(1,406)   

(814)   

(1,197) 

259 

7,855 

1,138 

7,346 

6,701 

794 

808 

6,717  $ 

6,552  $ 

5,893 

12.56  $ 

12.49  $ 

12.18  $ 

12.11  $ 

10.34 

10.28 

535

538

538

541

570

573

$ 

$ 

$ 

Revenues:

Product sales

Other revenues

Total revenues

Operating expenses:

Cost of sales

Research and development

Acquired in-process research and development

Selling, general and administrative

Other

Total operating expenses

Operating income

Other income (expense):

Interest expense, net

Other income (expense), net

Income before income taxes

Provision for income taxes

Net income

Earnings per share:

Basic

Diluted

Shares used in the calculation of earnings per share:

Basic

Diluted

See accompanying notes.

F-5

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

AMGEN INC.

Years ended December 31, 2023, 2022 and 2021 

(In millions)

2023

2022

2021

$ 

6,717  $ 

6,552  $ 

5,893 

50 

(150)   

— 

42 

(58)   

6,659  $ 

496 

67 

— 

2 

565 

7,117  $ 

(135) 

324 

(1) 

1 

189 

6,082 

Net income

Other comprehensive (loss) income, net of reclassification 
adjustments and taxes:
Gains (losses) on foreign currency translation

(Losses) gains on cash flow hedges

Losses on available-for-sale securities

Other

Other comprehensive (loss) income, net of taxes

Comprehensive income

$ 

See accompanying notes.

F-6

 
 
 
 
 
 
 
 
 
 
 
 
 
AMGEN INC.

CONSOLIDATED BALANCE SHEETS

December 31, 2023 and 2022 

(In millions, except per-share data)

ASSETS

2023

2022

$ 

10,944  $ 

— 

7,268 

9,518 

2,602 

30,332 

5,941 

32,641 

18,629 

9,611 

$ 

97,154  $ 

LIABILITIES AND STOCKHOLDERS’ EQUITY

$ 

1,590  $ 

15,359 

1,443 

18,392 

63,170 

2,354 
4,680 

2,326 

7,629 

1,676 

5,563 

4,930 

2,388 

22,186 

5,427 

16,080 

15,529 

5,899 

65,121 

1,572 

12,524 

1,591 

15,687 

37,354 

11 
5,757 

2,651 

Current assets:

Cash and cash equivalents

Marketable securities

Trade receivables, net

Inventories

Other current assets

Total current assets

Property, plant and equipment, net

Intangible assets, net

Goodwill

Other noncurrent assets

Total assets

Current liabilities:

Accounts payable

Accrued liabilities

Current portion of long-term debt

Total current liabilities

Long-term debt

Long-term deferred tax liabilities

Long-term tax liabilities

Other noncurrent liabilities

Contingencies and commitments

Stockholders’ equity:

Common stock and additional paid-in capital; $0.0001 par value per share; 2,750.0 
shares authorized; outstanding—535.4 shares in 2023 and 534.0 shares in 2022

Accumulated deficit

Accumulated other comprehensive loss

Total stockholders’ equity

Total liabilities and stockholders’ equity

33,070 

(26,549)   

(289)   

6,232 

$ 

97,154  $ 

32,514 

(28,622) 

(231) 

3,661 

65,121 

See accompanying notes.

F-7

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
AMGEN INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

Years ended December 31, 2023, 2022 and 2021 

(In millions, except per-share data)

Number
of shares
of common
stock

Common
stock and
additional
paid-in capital

Accumulated
deficit

Accumulated
other
comprehensive
(loss) income

Total

Balance as of December 31, 2020

578.3  $ 

31,802  $ 

(21,408)  $ 

(985)  $ 

Net income

Other comprehensive income, net of taxes
Dividends declared on common stock ($7.22 per 

share)

Issuance of common stock in connection with the 

Company’s equity award programs

Stock-based compensation expense
Tax impact related to employee stock-based 

compensation expense

Repurchases of common stock

Balance as of December 31, 2021

Net income

Other comprehensive income, net of taxes
Dividends declared on common stock ($7.95 per 

share)

Issuance of common stock in connection with the 

Company’s equity award programs

Stock-based compensation expense
Tax impact related to employee stock-based 

compensation expense

Repurchases of common stock

Balance as of December 31, 2022

Net income

Other comprehensive loss, net of taxes
Dividends declared on common stock ($8.64 per 

share)

Issuance of common stock in connection with the 

Company’s equity award programs

Stock-based compensation expense

Equity awards issued for Horizon acquisition, net
Tax impact related to employee stock-based 

compensation expense

Repurchases of common stock

Balance as of December 31, 2023

— 

— 

— 

1.7 

— 

— 

(21.7)   

558.3 

— 

— 

— 

1.8 

— 

— 

— 

— 

— 

82 

361 

(149)   

5,893 

— 

(4,098)   

— 

— 

— 

— 

(4,987)   

— 

189 

— 

— 

— 

— 

— 

32,096 

(24,600)   

(796)   

— 

— 

— 

138 

419 

(139)   

6,552 

— 

(4,264)   

— 

— 

— 

(26.1)   

534.0 

— 

(6,310)   

32,514 

(28,622)   

— 

— 

— 

1.4 

— 

— 

— 

— 

— 

— 

— 

95 

454 

141 

(134)   

— 

6,717 

— 

(4,644)   

— 

— 

— 

— 

— 

— 

565 

— 

— 

— 

— 

— 

(231)   

— 

(58)   

— 

— 

— 

— 

— 

— 

9,409 

5,893 

189 

(4,098) 

82 

361 

(149) 

(4,987) 

6,700 

6,552 

565 

(4,264) 

138 

419 

(139) 

(6,310) 

3,661 

6,717 

(58) 

(4,644) 

95 

454 

141 

(134) 

— 

535.4  $ 

33,070  $ 

(26,549)  $ 

(289)  $ 

6,232 

See accompanying notes.

F-8

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
AMGEN INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

Years ended December 31, 2023, 2022 and 2021 

(In millions)

2023

2022

2021

$ 

Cash flows from operating activities:

Net income
Depreciation, amortization and other
Stock-based compensation expense
Deferred income taxes
Acquired in-process research and development
Adjustments for equity method investments
Loss on divestiture
(Gains) losses on equity securities
Other items, net
Changes in operating assets and liabilities, net of acquisitions:

Trade receivables, net
Inventories
Other assets
Accounts payable
Accrued income taxes, net
Long-term tax liabilities
Accrued sales incentives and allowance
Other liabilities

Net cash provided by operating activities

Cash flows from investing activities:

Cash paid for acquisitions, net of cash acquired
Purchases of marketable securities
Proceeds from sales of marketable securities
Proceeds from maturities of marketable securities
Purchases of property, plant and equipment
Other

Net cash (used in) provided by investing activities

Cash flows from financing activities:
Net proceeds from issuance of debt
Extinguishment of debt
Repayment of debt
Repurchases of common stock
Dividends paid
Other

Net cash provided by (used in) financing activities

Increase (decrease) in cash and cash equivalents
Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of year

$ 

See accompanying notes.

F-9

6,717  $ 
4,071 
431 
(1,273)   
— 
11 
— 
(1,565)   
563 

(1,015)   
491 
(564)   
(402)   
(1,031)   
371 
935 
731 
8,471 

(26,989)   
(1)   

1,123 
550 
(1,112)   
225 
(26,204)   

27,777 

(647)   
(1,454)   
— 
(4,556)   
(72)   

21,048 
3,315 
7,629 
10,944  $ 

6,552  $ 
3,417 
401 
(1,198)   
— 
891 
567 
127 
(303)   

(746)   
(742)   
258 
154 
(647)   
229 
846 
(85)   

9,721 

(3,839)   
(2,587)   
98 
1,120 
(936)   
100 
(6,044)   

6,919 
(297)   
— 
(6,360)   
(4,196)   
(103)   
(4,037)   
(360)   
7,989 
7,629  $ 

5,893 
3,398 
341 
(453) 
1,505 
33 
— 
— 
(262) 

(429) 
(165) 
(237) 
(69) 
(854) 
204 
404 
(48) 
9,261 

(2,529) 
(8,900) 
4,403 
8,831 
(880) 
(192) 
733 

4,945 
— 
(4,150) 
(4,975) 
(4,013) 
(78) 
(8,271) 
1,723 
6,266 
7,989 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
AMGEN INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2023 

1. Summary of significant accounting policies

Business

Amgen  Inc.  (including  its  subsidiaries,  referred  to  as  “Amgen,”  “the  Company,”  “we,”  “our”  or  “us”)  is  a  global 
biotechnology pioneer that discovers, develops, manufactures and delivers innovative human therapeutics. We operate in one 
business segment: human therapeutics.

Principles of consolidation

The  consolidated  financial  statements  include  the  accounts  of  Amgen  as  well  as  its  majority-owned  subsidiaries.  In 
determining whether we are the primary beneficiary of a variable interest entity, we consider whether we have both the power 
to direct activities of the entity that most significantly impact the entity’s economic performance and the obligation to absorb 
losses of, or the right to receive benefits from, the entity that could potentially be significant to that entity. We do not have any 
significant  interests  in  any  variable  interest  entities  of  which  we  are  the  primary  beneficiary.  All  material  intercompany 
transactions and balances have been eliminated in consolidation. Certain reclassifications have been made to prior periods in the 
consolidated financial statements and accompanying notes to conform with the current presentation.

On October 6, 2023, Amgen completed its acquisition of Horizon, and its operations became included in our consolidated 
financial statements commencing on the acquisition date. See Note 3, Acquisitions and divestitures, for additional information 
regarding this acquisition.

Use of estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates 
and  assumptions  that  affect  the  amounts  reported  in  the  consolidated  financial  statements  and  accompanying  notes.  Actual 
results may differ from those estimates.

Revenues

Product sales and sales deductions

Revenue from product sales is recognized upon transfer of control of a product to a customer, generally upon delivery, 
based  on  an  amount  that  reflects  the  consideration  to  which  we  expect  to  be  entitled,  net  of  accruals  for  estimated  rebates, 
wholesaler chargebacks, discounts and other deductions (collectively, sales deductions) and returns established at the time of 
sale.

We  analyze  the  adequacy  of  our  accruals  for  sales  deductions  quarterly.  Amounts  accrued  for  sales  deductions  are 
adjusted when trends or significant events indicate that an adjustment is appropriate. Accruals are also adjusted to reflect actual 
results. Accruals for sales deductions are based primarily on estimates of the amounts earned or to be claimed on the related 
sales. These estimates take into consideration current contractual and statutory requirements, specific known market events and 
trends, internal and external historical data and forecasted customer buying patterns. Sales deductions are substantially product 
specific  and  therefore,  for  any  given  period,  can  be  affected  by  the  mix  of  products  sold.  Included  in  sales  deductions  are 
immaterial net adjustments related to prior-period sales due to changes in estimates.

Returns  are  estimated  through  comparison  of  historical  return  data  with  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, when appropriate. Historically, sales return provisions have amounted to less than 1% of gross product 
sales. Changes in estimates for prior-period sales return provisions have historically been immaterial.

Our payment terms vary by types and locations of customers and by products or services offered. Payment terms differ by 
jurisdiction and customer, but payment is generally required in a term ranging from 30 to 120 days from date of shipment or 
satisfaction of the performance obligation. For certain products or services and certain customer types, we may require payment 
before products are delivered or services are rendered to customers.

Indirect taxes collected from customers and remitted to government authorities that are related to sales of the Company’s 

products, primarily in Europe, are excluded from revenues.

As a practical expedient, sales commissions are expensed when incurred because the amortization period would have been 

F-10

one year or less. These costs are recorded in SG&A expense in the Consolidated Statements of Income.

Other revenues

Other revenues consist primarily of royalty income and corporate partner revenues. Royalties from licensees are based on 
third-party  sales  of  licensed  products  and  are  recorded  when  the  related  third-party  product  sale  occurs.  Royalty  income  is 
estimated based on historical and forecasted sales trends. Corporate partner revenues are composed mainly of license fees and 
milestones  earned  and  our  share  of  commercial  profits  generated  from  collaborations.  See  Arrangements  with  multiple-
performance obligations, discussed below.

Arrangements with multiple-performance obligations

From  time  to  time,  we  enter  into  arrangements  for  the  R&D,  manufacture  and/or  commercialization  of  products  and 
product  candidates.  Such  arrangements  may  require  us  to  deliver  various  rights,  services  and/or  goods,  including  intellectual 
property  rights/licenses,  R&D  services,  manufacturing  services  and/or  commercialization  services.  The  underlying  terms  of 
these  arrangements  generally  provide  for  consideration  to  Amgen  in  the  form  of  nonrefundable,  upfront  license  fees; 
development and commercial-performance milestone payments; royalty payments; and/or profit sharing.

In  arrangements  involving  more  than  one  performance  obligation,  each  required  performance  obligation  is  evaluated  to 
determine whether it qualifies as a distinct performance obligation based on whether (i) the customer can benefit from the good 
or service either on its own or together with other resources that are readily available and (ii) the good or service is separately 
identifiable  from  other  promises  in  the  contract.  The  consideration  under  the  arrangement  is  then  allocated  to  each  separate 
distinct  performance  obligation  based  on  its  respective  relative  stand-alone  selling  price.  The  estimated  selling  price  of  each 
deliverable reflects our best estimate of what the selling price would be if the deliverable was regularly sold by us on a stand-
alone basis or by using an adjusted market assessment approach if selling price on a stand-alone basis is not available.

The consideration allocated to each distinct performance obligation is recognized as revenue when control of the related 
goods  or  services  is  transferred.  Consideration  associated  with  at-risk  substantive  performance  milestones  is  recognized  as 
revenue when it is probable that a significant reversal of the cumulative revenue recognized will not occur. We utilize the sales- 
and usage-based royalty exception in arrangements that resulted from the license of intellectual property, recognizing revenues 
generated from royalties or profit sharing as the underlying sales occur.

Research and development costs

R&D  costs  are  expensed  as  incurred  and  primarily  include  salaries,  benefits  and  other  staff-related  costs;  facilities  and 
overhead  costs;  clinical  trial  and  related  clinical  manufacturing  costs;  contract  services  and  other  outside  costs;  information 
systems’ costs; and amortization of acquired technology used in R&D with alternative future uses. R&D expenses also include 
costs  and  cost  recoveries  associated  with  third-party  R&D  arrangements,  including  upfront  fees  and  milestones  paid  to  third 
parties in connection with technologies that had not reached technological feasibility and did not have an alternative future use. 
Net payment or reimbursement of R&D costs is recognized when the obligations are incurred or as we become entitled to the 
cost recovery. See Note 9, Collaborations.

Selling, general and administrative costs

SG&A costs are primarily composed of salaries, benefits and other staff-related costs associated with sales and marketing, 
finance,  legal  and  other  administrative  personnel;  facilities  and  overhead  costs;  outside  marketing,  advertising  and  legal 
expenses; the U.S. healthcare reform federal excise fee on Branded Prescription Pharmaceutical Manufacturers and Importers; 
and other general and administrative costs. Advertising costs are expensed as incurred and were $647 million, $841 million and 
$843 million during the years ended December 31, 2023, 2022 and 2021, respectively. SG&A expenses also include costs and 
cost  recoveries  associated  with  marketing  and  promotion  efforts  under  certain  collaborative  arrangements.  Net  payment  or 
reimbursement of SG&A costs is recognized when the obligations are incurred or we become entitled to the cost recovery. See 
Note 9, Collaborations.

Leases

At inception of a contract, we determine whether an arrangement is or contains a lease. For all leases, we determine the 
classification as either operating or financing. Operating leases are included in Other noncurrent assets, Accrued liabilities and 
Other noncurrent liabilities in our Consolidated Balance Sheets.

F-11

ROU assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation 
to make lease payments under the lease. Lease recognition occurs at the commencement date, and lease liability amounts are 
based  on  the  present  value  of  lease  payments  made  during  the  lease  term.  Our  lease  terms  may  include  options  to  extend  or 
terminate  a  lease  when  it  is  reasonably  certain  that  we  will  exercise  that  option.  Because  most  of  our  leases  do  not  provide 
information to determine an implicit interest rate, we use our incremental borrowing rate in determining the present value of 
lease  payments.  ROU  assets  also  include  any  lease  payments  made  prior  to  the  commencement  date  less  lease  incentives 
received. Operating lease expense is recognized on a straight-line basis over the lease term.

We  have  lease  agreements  with  both  lease  and  nonlease  components,  which  are  generally  accounted  for  together  as  a 
single lease component. In addition, for certain vehicle and equipment leases, we apply a portfolio approach to determine the 
lease term and discount rate.

Stock-based compensation

We have stock-based compensation plans under which various types of equity-based awards are granted, including RSUs, 
performance  units  and  stock  options.  The  fair  values  of  RSUs  and  stock  option  awards,  which  are  subject  only  to  service 
conditions  with  graded  vesting,  are  recognized  as  compensation  expense,  generally  on  a  straight-line  basis  over  the  service 
period,  net  of  estimated  forfeitures.  The  fair  values  of  performance  unit  awards  are  recognized  as  compensation  expense, 
generally  on  a  straight-line  basis  from  the  grant  date  to  the  end  of  the  performance  period.  See  Note  5,  Stock-based 
compensation.

Income taxes

We  provide  for  income  taxes  based  on  pretax  income  and  applicable  tax  rates  in  the  various  jurisdictions  in  which  we 
operate. Significant judgment is required in determining our provision for income taxes and income tax assets and liabilities, 
including evaluating uncertainties in the application of accounting principles and complex tax laws. Deferred income taxes are 
recorded for the expected tax consequences of temporary differences between the bases of assets and liabilities, as well as for 
loss and tax credit carryforwards for financial reporting purposes and amounts recognized for income tax purposes. We record a 
valuation  allowance  to  reduce  our  deferred  tax  assets  to  the  amount  of  future  tax  benefit  that  is  more  likely  than  not  to  be 
realized.

We recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be 
sustained upon examination by tax authorities based on the technical merits of the position. The tax benefit recognized in the 
consolidated financial statements for a particular tax position is based on the largest benefit that is more likely than not to be 
realized.  The  amount  of  UTBs  is  adjusted  as  appropriate  for  changes  in  facts  and  circumstances,  such  as  significant 
amendments to existing tax law, new regulations or interpretations by tax authorities, new information obtained during a tax 
examination  or  resolution  of  an  examination.  We  recognize  both  accrued  interest  and  penalties,  when  appropriate,  related  to 
UTBs in income tax expense. See Note 7, Income taxes. 

Acquisitions

We  first  determine  whether  a  set  of  assets  acquired  constitute  a  business  and  should  be  accounted  for  as  a  business 
combination. If the assets acquired do not constitute a business, we account for the transaction as an asset acquisition. Business 
combinations  are  accounted  for  by  means  of  the  acquisition  method  of  accounting.  Under  the  acquisition  method,  assets 
acquired, including IPR&D projects, and liabilities assumed are recorded at their respective fair values as of the acquisition date 
in our consolidated financial statements. The excess of the fair value of consideration transferred over the fair value of the net 
assets  acquired  is  recorded  as  goodwill.  Contingent  consideration  obligations  incurred  in  connection  with  a  business 
combination  (including  the  assumption  of  an  acquiree’s  liability  arising  from  an  acquisition  it  consummated  prior  to  our 
acquisition)  are  recorded  at  their  fair  values  on  the  acquisition  date  and  remeasured  at  their  fair  values  each  subsequent 
reporting  period  until  the  related  contingencies  have  been  resolved.  The  resulting  changes  in  fair  values  are  recorded  in 
earnings. In contrast, asset acquisitions are accounted for by using a cost accumulation and allocation model. Under this model, 
the cost of the acquisition is allocated to the assets acquired and liabilities assumed. IPR&D projects with no alternative future 
use  are  recorded  in  R&D  expense  upon  acquisition,  and  contingent  consideration  obligations  incurred  in  connection  with  an 
asset  acquisition  are  recorded  when  it  is  probable  that  they  will  occur  and  they  can  be  reasonably  estimated.  See  Note  3, 
Acquisitions and divestitures, and Note 18, Fair value measurement.

Cash equivalents

We consider cash equivalents to be only those investments that are highly liquid, that are readily convertible to cash and 

that mature within three months from the date of purchase.

F-12

Interest-bearing securities

We consider our interest-bearing securities investment portfolio as available-for-sale, and accordingly, these investments 
are recorded at fair value, with unrealized gains and losses recorded in AOCI. Investments with maturities beyond one year may 
be  classified  as  short-term  marketable  securities  in  the  Consolidated  Balance  Sheets  due  to  their  highly  liquid  nature  and 
because they represent the Company’s investments that are available for current operations. See Note 10, Investments, and Note 
18, Fair value measurement.

Inventories

Inventories are stated at the lower of cost or net realizable value. Cost, which includes amounts related to materials, labor 
and overhead, is determined in a manner that approximates the first-in, first-out method. Net realizable value is the estimated 
selling price in the ordinary course of business less reasonably predictable costs of completion, disposal and transportation. See 
Note 11, Inventories.

Derivatives

We  recognize  all  of  our  derivative  instruments  as  either  assets  or  liabilities  at  fair  value  in  the  Consolidated  Balance 
Sheets.  The  accounting  for  changes  in  the  fair  value  of  a  derivative  instrument  depends  on  whether  the  derivative  has  been 
formally designated and qualifies as part of a hedging relationship under the applicable accounting standards and, further, on 
the  type  of  hedging  relationship.  For  derivatives  formally  designated  as  hedges,  we  assess  both  at  inception  and  quarterly 
thereafter whether the hedging derivatives are highly effective in offsetting changes in either the fair value or cash flows of the 
hedged  item.  Our  derivatives  that  are  not  designated  and  do  not  qualify  as  hedges  are  adjusted  to  fair  value  through  current 
earnings. See Note 18, Fair value measurement, and Note 19, Derivative instruments.

Property, plant and equipment, net

Property,  plant  and  equipment  is  recorded  at  historical  cost,  net  of  accumulated  depreciation,  amortization  and,  if 
applicable,  impairment  charges.  We  review  our  property,  plant  and  equipment  assets  for  impairment  whenever  events  or 
changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Depreciation is recorded over 
the assets’ useful lives on a straight-line basis. Leasehold improvements are amortized on a straight-line basis over the shorter 
of their estimated useful lives or lease terms. See Note 12, Property, plant and equipment.

Goodwill and other intangible assets

Finite-lived intangible assets are recorded at cost, net of accumulated amortization, and, if applicable, impairment charges. 
Amortization of finite-lived intangible assets is recorded over the assets’ estimated useful lives on a straight-line basis or based 
on the pattern in which economic benefits are consumed, if reliably determinable. We review our finite-lived intangible assets 
for  impairment  whenever  events  or  changes  in  circumstances  indicate  that  the  carrying  amount  of  an  asset  may  not  be 
recoverable. See Note 13, Goodwill and other intangible assets.

The fair values of IPR&D projects acquired in a business combination that are not complete are capitalized and accounted 
for  as  indefinite-lived  intangible  assets  until  completion  or  abandonment  of  the  related  R&D  efforts.  Upon  successful 
completion  of  the  project,  the  capitalized  amount  is  amortized  over  its  estimated  useful  life.  If  a  project  is  abandoned,  all 
remaining  capitalized  amounts  are  written  off  immediately.  Major  risks  and  uncertainties  are  often  associated  with  IPR&D 
projects because we are required to obtain regulatory approvals before marketing the resulting products. Such approvals require 
completing clinical trials that demonstrate a product candidate is safe and effective. Consequently, the eventual realized value 
of  the  acquired  IPR&D  project  may  vary  from  its  fair  value  at  the  date  of  acquisition,  and  IPR&D  impairment  charges  may 
occur in future periods.

Capitalized IPR&D projects are tested for impairment annually and whenever events or changes in circumstances indicate 
that the carrying amount may not be recoverable. We consider various factors for potential impairment, including the current 
legal and regulatory environment and the competitive landscape. Adverse clinical trial results, significant delays in obtaining 
marketing  approval,  the  inability  to  bring  a  product  to  market  and  the  introduction  or  advancement  of  competitors’  products 
could result in partial or full impairment of the related intangible assets.

We perform an impairment test of goodwill annually and whenever events or changes in circumstances indicate that the 
carrying amount may not be recoverable. To date, an impairment of goodwill has not been recorded. See Note 13, Goodwill and 
other intangible assets.

F-13

Contingencies

In  the  ordinary  course  of  business,  we  are  involved  in  various  legal  proceedings,  government  investigations  and  other 
matters that are complex in nature and have outcomes that are difficult to predict. Certain of these proceedings are discussed in 
Note  20,  Contingencies  and  commitments.  We  record  accruals  for  loss  contingencies  to  the  extent  that  we  conclude  it  is 
probable that a liability has been incurred and the amount of the related loss can be reasonably estimated. We evaluate, on a 
quarterly basis, developments in legal proceedings and other matters that could cause an increase or decrease in the amount of 
the liability that has been accrued previously.

Foreign currency translation

The  net  assets  of  international  subsidiaries  whose  functional  currencies  are  not  in  U.S.  dollars  are  translated  into  U.S. 
dollars using current exchange rates. The U.S. dollar effects that arise from translation of the net assets of these subsidiaries at 
changing rates are recognized in AOCI. The subsidiaries’ earnings are translated into U.S. dollars by using average exchange 
rates.

Equity investments

Marketable and nonmarketable equity securities

Investments in publicly traded equity securities with readily determinable fair values are recorded at quoted market prices 
for identical securities, with changes in fair value recorded in Other income (expense), net, in the Consolidated Statements of 
Income. Investments in equity securities without readily determinable fair values are recorded at cost minus impairment, if any, 
adjusted  for  changes  resulting  from  observable  price  changes  in  orderly  transactions  for  identical  or  similar  securities.  Such 
adjustments are recorded in Other income (expense), net, in the Consolidated Statements of Income.

Equity method investments

Equity investments that give us the ability to exert significant influence, but not control, over an investee for which we 
have not elected the fair value option are accounted for under the equity method of accounting. In concluding whether we have 
the ability to exercise significant influence over an investee, we consider factors such as our ownership percentage, voting and 
other shareholder rights, board of directors representation and the existence of other collaborative or business relationships. The 
equity  method  of  accounting  requires  us  to  allocate  the  difference  between  the  fair  value  of  securities  acquired  and  our 
proportionate  share  of  the  carrying  value  of  the  underlying  assets  (the  basis  difference)  to  various  items  and  amortize  such 
differences over their useful lives. Our share of investees’ earnings or losses and amortization of basis differences, if any, are 
recorded  one  quarter  in  arrears  in  Other  income  (expense),  net,  in  the  Consolidated  Statements  of  Income.  We  record 
impairment  losses  on  our  equity  method  investments  if  we  deem  the  impairment  to  be  other-than-temporary.  We  deem  an 
impairment to be other-than-temporary based on various factors, including but not limited to, the length of time the fair value is 
below  the  carrying  value,  volatility  of  the  security  price  and  our  intent  and  ability  to  retain  the  investment  to  allow  for  a 
recovery in fair value.

For equity method investments for which we have elected the fair value option, changes in fair value are recorded in Other 

income (expense), net, in the Consolidated Statements of Income.

Additionally, we hold investments in limited partnerships, which primarily invest in early-stage biotechnology companies. 
As a practical expedient, such limited partnership investments are measured by using our proportionate share of the net asset 
values of the underlying investments held by the limited partnerships, with such changes included in Other income (expense), 
net, in the Consolidated Statements of Income.

Recent accounting pronouncements

In  November  2023,  the  FASB  issued  a  new  accounting  standard  which  improves  reportable  segment  disclosure 
requirements. The new standard will require enhanced disclosures about a public company’s significant segment expenses and 
more  timely  and  detailed  segment  information  reporting  throughout  the  fiscal  period,  including  for  companies  with  a  single 
reportable  segment.  The  standard  is  effective  for  annual  periods  beginning  after  December  15,  2023  and  interim  periods 
beginning  after  December  15,  2024,  and  early  adoption  is  permitted.  We  are  currently  evaluating  the  impact  of  this  new 
standard on our consolidated financial statements and related disclosures.

In December 2023, the FASB issued a new accounting standard which improves income tax disclosure requirements. The 
new  standard  will  require  more  detailed  information  on  several  income  tax  disclosures,  such  as  income  taxes  paid  and  the 
income tax rate reconciliation table. The standard is effective for public business entities such as Amgen with annual periods 
beginning  after  December  15,  2024,  and  early  adoption  is  permitted.  We  are  currently  evaluating  the  impact  of  this  new 
standard on our consolidated financial statements and related disclosures.

F-14

2. Restructuring

In the first quarter of 2023, we initiated a restructuring plan to enhance continued innovation, including investments in 
first-in-class medicines, while improving our cost structure. As part of the plan, we are reallocating resources to the areas of the 
business that will enable long-term growth. We completed substantially all the activities associated with this restructuring plan 
in 2023.

The  following  table  summarizes  recorded  charges  related  to  the  restructuring  plan  by  type  of  activity  and  the  locations 

recognized within the Consolidated Statements of Income (in millions):

Cost of sales

Research and development

Selling, general and administrative

Other

Total

Year ended December 31, 2023

Separation costs

Asset impairments 
and other charges

Total

$ 

$ 

—  $ 

36  $ 

— 

— 

186 

29 

13 

3 

186  $ 

81  $ 

36 

29 

13 

189 

267 

As  of  December  31,  2023,  total  restructuring  liability  decreased  to  $45  million  primarily  due  to  payments  related  to 

separation costs. The total restructuring liability was included in Accrued liabilities in the Consolidated Balance Sheets.

3. Acquisitions and divestitures 

Acquisition of Horizon Therapeutics plc

On  October  6,  2023,  Amgen  completed  its  acquisition  of  Horizon  for  $116.50  per  share  in  cash,  representing  a  total 
consideration of approximately $27.8 billion. The acquisition was funded primarily through our March 2023 debt issuance and 
borrowings  from  our  term  loan  credit  agreement.  See  Note  16,  Financing  arrangements.  Horizon  is  a  global  biotechnology 
company  focused  on  the  discovery,  development  and  commercialization  of  medicines  that  address  critical  needs  of  patients 
impacted  by  rare,  autoimmune  and  severe  inflammatory  diseases.  The  acquisition,  which  was  accounted  for  as  a  business 
combination,  aligns  with  Amgen’s  core  strategy  of  delivering  innovative  medicines  that  make  a  significant  difference  for 
patients suffering from serious diseases and strengthens Amgen’s leading rare disease portfolio by adding first-in-class, early-
in-lifecycle medicines, including TEPEZZA for thyroid eye disease, KRYSTEXXA for chronic refractory gout and UPLIZNA 
for neuromyelitis optica spectrum disorder. Upon its acquisition, Horizon became a wholly owned subsidiary of Amgen, and its 
operations have been included in our consolidated financial statements commencing on the acquisition date.

During  the  three  months  ended  December  31,  2023,  the  Company  incurred  approximately  $487  million  of  acquisition 
costs related to the closing of our Horizon acquisition, consisting of $167 million for share-based payments to settle non-vested 
equity awards attributable to post-combination services, severance and other employee-related expenses, and $320 million of 
transaction costs. These costs were included primarily in SG&A expense in the Consolidated Statements of Income.

F-15

 
 
 
 
 
 
 
 
 
 
 
The following table summarizes the total consideration and allocated acquisition date fair values of assets acquired and 

liabilities assumed (in millions):

Cash and cash equivalents

Inventories
Property, plant and equipment, net

Finite-lived intangible assets – developed-product-technology rights

IPR&D

Goodwill

Deferred tax asset

Deferred tax liability

Other assets and liabilities, net

Total assets acquired, net

$ 

Amounts

681 

5,025 

318 

19,590 

1,060 

3,111 

834 

(2,492) 

(294) 

$ 

27,833 

The  $27.8  billion  total  consideration  for  this  transaction  consisted  of  (i)  cash  consideration  transferred  to  common 
shareholders of $26.7 billion; (ii) cash consideration transferred to vested and outstanding options, outstanding RSU awards, 
and outstanding PSU awards of $523 million; (iii) fair value of Amgen replacement awards (based on conversion of outstanding 
employee RSU awards) of $180 million representing non-cash consideration; and (iv) a portion of Horizon’s debt, settled by 
Amgen  on  the  closing  date,  of  $382  million.  Amgen  issued  1.7  million  replacement  equity  awards  with  the  original  vesting 
conditions, and fair value was determined based on acquisition date fair value based on the conversion calculation. See Note 5, 
Stock-based compensation.

The estimated fair values of $20.7 billion for the developed-product-technology rights and IPR&D intangible assets were 
determined using a multi-period excess earnings income approach that discounts expected future cash flows to present value by 
applying a discount rate that represents the estimated rate that market participants would use to value the intangible assets. The 
projected  cash  flows  were  based  on  certain  assumptions  attributable  to  the  respective  intangible  asset,  including  estimates  of 
future  revenues  and  expenses,  the  time  and  resources  needed  to  complete  development  and  the  probabilities  of  obtaining 
marketing approval from the FDA and other regulatory agencies. The developed-product-technology rights are being amortized 
on a straight-line basis over a weighted-average period of approximately 10 years using the straight-line methodology.

The  estimated  fair  value  of  the  acquired  inventory  of  $5.0  billion  was  determined  using  the  comparative  sales  method, 
which uses actual or expected selling prices of inventory as the base amount to which adjustments for selling effort and a profit 
on the buyer’s effort are applied. The inventory fair value adjustment is being amortized using a weighted-average inventory 
turnover, which we estimate to approximate 27 months.

A deferred tax liability of $2.5 billion was recognized on the temporary differences related to the book bases and tax bases 
of  the  acquired  identifiable  assets  and  assumed  liabilities,  primarily  driven  by  the  intangible  assets  acquired,  as  well  as 
associated deferred tax asset for anticipatory foreign tax credits of $834 million.

The  excess  of  the  acquisition  date  consideration  over  the  fair  values  assigned  to  the  assets  acquired  and  the  liabilities 
assumed  of  $3.1  billion  was  recorded  as  goodwill,  which  is  not  deductible  for  tax  purposes.  The  goodwill  value  represents 
expected synergies from the marketed products acquired and other benefits.

Our accounting for this acquisition is preliminary and will be finalized upon completion of our analysis to determine the 
acquisition  date  fair  values  of  certain  assets  acquired,  liabilities  assumed  and  tax-related  items  as  we  obtain  additional 
information during the measurement period of up to one year from the acquisition date.

Following the acquisition date of October 6, 2023, the operating results of Horizon have been included in our consolidated 
financial  statements.  For  the  period  from  the  acquisition  date  through  December  31,  2023,  total  revenues  and  net  losses 
attributable to Horizon were $955 million and $1.2 billion, respectively, inclusive of $633 million of inventory fair value step-
up amortization and $479 million of intangible asset amortization recorded in Cost of sales in the Consolidated Statements of 
Income.

F-16

 
 
 
 
 
 
 
 
Supplemental Pro Forma Financial Information

The  following  table  presents  the  unaudited  supplemental  pro  forma  results  of  a  hypothetical  combined  Amgen  and 
Horizon for the years ended December 31, 2023 and 2022, as if the acquisition of Horizon had occurred on January 1, 2022 (in 
millions):

Total revenue

Net income

Years ended December 31,

2023

2022

$ 

$ 

30,969  $ 

5,383  $ 

29,964 

2,381 

The  unaudited  supplemental  pro  forma  combined  financial  information  was  prepared  using  the  acquisition  method  of 
accounting and was based on the historical financial information of Amgen and Horizon. In order to reflect the occurrence of 
the acquisition on January 1, 2022, the unaudited supplemental pro forma financial information includes adjustments to reflect 
the following: (i) incremental amortization expense based on the current preliminary fair values of the identifiable intangible 
assets and inventory step-up; (ii) the additional interest expense associated with the issuance of debt to finance the acquisition; 
(iii) the reclassification of transaction and other acquisition-related costs incurred during the three months ended December 31, 
2023, to the year ended December 31, 2022; and (iv) the income tax impact using an estimated effective tax rate applied to the 
combined  entity.  The  unaudited  supplemental  pro  forma  financial  information  is  not  necessarily  indicative  of  what  the 
consolidated  results  of  operations  would  have  been  had  the  acquisition  been  completed  on  January  1,  2022.  In  addition,  the 
unaudited pro forma financial information is not a projection of future results of operations of the combined company, nor does 
it reflect the expected realization of any synergies or cost savings associated with the acquisition.

Acquisition of ChemoCentryx, Inc.

On  October  20,  2022,  we  acquired  all  of  the  outstanding  stock  of  ChemoCentryx,  a  publicly  traded  biotechnology 
company  focused  on  orally  administered  therapeutics  to  treat  autoimmune  diseases,  inflammatory  disorders  and  cancer,  for 
$52.00  per  share  in  cash,  representing  a  total  consideration  of  $3.9  billion.  The  acquisition,  which  was  accounted  for  as  a 
business  combination,  includes  TAVNEOS,  an  orally  administered  selective  complement  5a  receptor  inhibitor  that  was 
approved  by  the  FDA  in  October  2021  as  an  adjunctive  therapy  for  adults  with  severe  active  antineutrophil  cytoplasmic 
autoantibody-associated vasculitis (ANCA-associated vasculitis). TAVNEOS is commercialized by us in the United States; for 
markets outside the United States, TAVNEOS is commercialized by a collaboration partner, and Amgen is entitled to royalties 
and milestones based on future sales of the product. Upon its acquisition, ChemoCentryx became a wholly owned subsidiary of 
Amgen, and its operations became included in our consolidated financial statements commencing on the acquisition date.

Measurement  period  adjustments  during  the  year  ended  December  31,  2023,  included  changes  in  the  purchase  price 
allocation  and  total  consideration,  resulting  in  a  net  decrease  of  approximately  $18  million  to  goodwill.  The  measurement 
period  adjustments  resulted  primarily  from  valuation  inputs  pertaining  to  the  TAVNEOS  intangible  assets,  adjustments  to 
vendor payables and deferred tax attributes based on facts and circumstances that existed as of the acquisition date and did not 
result from events subsequent to the acquisition date. The adjustments did not have a significant impact on Amgen’s results of 
operations during the year ended December 31, 2023, and would not have had a significant impact on prior-period results if the 
adjustments had been made as of the acquisition date.

F-17

The following table summarizes the final total consideration and allocated acquisition date fair values of assets acquired 

and liabilities assumed, inclusive of measurement period adjustments (in millions):

Cash and cash equivalents

Marketable securities

Inventories
Finite-lived intangible assets – developed-product-technology rights

Goodwill

Other liabilities, net

Deferred tax liability, net

Total assets acquired, net

$ 

Amounts

86 

235 

41 

3,499 

649 

(83) 

(502) 

$ 

3,925 

The $3.9 billion total consideration consisted of (i) a $3.7 billion cash payment to outstanding common stockholders of 
ChemoCentryx and (ii) a $181 million cash payment to equity award holders of ChemoCentryx for services rendered prior to 
the acquisition date of October 20, 2022, under the ChemoCentryx equity award plans.

The developed-product-technology rights acquired relates to TAVNEOS, which is approved in the United States and the 
EU for ANCA-associated vasculitis. The estimated fair values of $3.5 billion were determined by using a multi-period excess 
earnings income approach that discounts expected future cash flows to present value by applying a discount rate that represents 
the estimated rate that market participants would use to value the intangible assets. The developed-product-technology rights 
are being amortized on a straight-line basis over a weighted-average period of approximately 11 years using the straight-line 
method.

The  estimated  fair  value  of  the  acquired  inventory  of  $41  million  was  determined  using  the  comparative  sales  method, 
which uses actual or expected selling prices of inventory as the base amount to which adjustments for selling effort and a profit 
on  the  buyer’s  effort  are  applied.  The  inventory  fair  value  adjustment  was  amortized  as  inventory  turned  over,  which  we 
estimated to be approximately 13 months.

A net deferred tax liability of $502 million was recognized on the temporary differences related to the book bases and tax 

bases of the acquired identifiable assets and assumed liabilities, primarily driven by the intangible assets acquired.

The  excess  of  the  acquisition  date  consideration  over  the  fair  values  assigned  to  the  assets  acquired  and  the  liabilities 
assumed of $649 million was recorded as goodwill, which is not deductible for tax purposes. The goodwill value is primarily 
attributable to the expected synergies from the TAVNEOS asset.

Acquisition of Teneobio, Inc.

On October 19, 2021, we acquired all of the outstanding stock of Teneobio, a privately held, clinical-stage biotechnology 
company  developing  a  new  class  of  biologics  called  human  heavy-chain  antibodies,  which  are  single-chain  antibodies 
composed  of  the  human  heavy-chain  domain.  The  transaction,  which  was  accounted  for  as  a  business  combination,  includes 
Teneobio’s  proprietary  bispecific  and  multispecific  antibody  technologies,  which  complement  Amgen’s  existing  antibody 
capabilities  and  bispecific  T-cell  engager  BiTE®  platform  and  will  enable  significant  acceleration  and  efficiency  in  the 
discovery  and  development  of  new  molecules  to  treat  diseases  across  Amgen’s  core  therapeutic  areas.  Upon  its  acquisition, 
Teneobio  became  a  wholly  owned  subsidiary  of  Amgen,  and  its  operations  have  been  included  in  our  consolidated  financial 
statements commencing on the acquisition date.

F-18

 
 
 
 
 
 
Measurement period adjustments for the year ended December 31, 2022, included changes to the purchase price allocation 
and  total  consideration,  resulting  in  a  net  increase  of  $22  million  to  goodwill.  The  measurement  period  adjustments  resulted 
primarily  from  valuation  inputs  pertaining  to  certain  acquired  assets  based  on  facts  and  circumstances  that  existed  as  of  the 
acquisition date and did not result from events subsequent to the acquisition date. These adjustments did not have a significant 
impact  on  Amgen’s  results  of  operations  during  the  year  ended  December  31,  2022,  and  would  not  have  had  a  significant 
impact on prior-period results if these adjustments had been made as of the acquisition date.

The following table summarizes the final total consideration and allocated acquisition date fair values of assets acquired 

and liabilities assumed, inclusive of measurement period adjustments (in millions):

Cash purchase price

Contingent consideration

Total consideration

Cash and cash equivalents

IPR&D

Finite-lived intangible asset – R&D technology rights
Finite-lived intangible assets – licensing rights

Goodwill

Other assets, net

Deferred tax liability

Total assets acquired, net

Amounts

993 

299 

1,292 

100 

991 

115 

41 

273 

16 

(244) 

1,292 

$ 

$ 

$ 

$ 

Consideration for this transaction comprised of (i) an upfront cash payment of $993 million, which included a working-
capital adjustment, and (ii) future contingent milestone payments to Teneobio’s former equity holders of up to $1.6 billion in 
cash, based on the achievement of various development and regulatory milestones with regard to the leading asset (AMG 340, 
formerly  TNB-585)  and  to  various  development  milestones  for  other  drug  candidates.  The  estimated  fair  values  of  the 
contingent  consideration  obligations  aggregated  $299  million  as  of  the  acquisition  date  and  were  determined  using  a 
probability-weighted  expected  return  methodology.  The  assumptions  in  this  method  include  the  probability  of  achieving  the 
milestones and the expected payment dates, with such amounts discounted to present value based on our pretax cost of debt. 
See Note 18, Fair value measurement, for information regarding the estimated fair value of these obligations as of December 
31, 2023.

The estimated fair values of acquired IPR&D assets totaled $991 million, of which $784 million related to AMG 340, and 
the  balance  related  to  four  separate  preclinical  oncology  programs.  See  Note  13,  Goodwill  and  other  intangible  assets,  for 
information regarding the acquired IPR&D assets as of December 31, 2023. The R&D technology rights of $115 million related 
to Teneobio’s proprietary bispecific and multispecific antibody technologies; the amount is being amortized over 10 years by 
using the straight-line method. Teneobio has also licensed its technology and certain identified targets to various third parties, 
representing contractual agreements valued at $41 million. The estimated fair values for these intangible assets were determined 
using a multi-period excess earnings income approach that discounts expected future cash flows to present value by applying a 
discount rate that represents the estimated rate that market participants would use to value the intangible assets. The projected 
cash  flows  were  based  on  certain  assumptions  attributable  to  the  respective  intangible  asset,  including  estimates  of  future 
revenues and expenses, the time and resources needed to complete development and the probabilities of obtaining marketing 
approval from the FDA and other regulatory agencies.

A deferred tax liability of $244 million was recognized on temporary differences related to the book bases and tax bases 

of the acquired identifiable assets and assumed liabilities, primarily driven by the intangible assets acquired.

The  excess  of  the  acquisition  date  consideration  over  the  fair  values  assigned  to  the  assets  acquired  and  the  liabilities 
assumed of $273 million was recorded as goodwill, which is not deductible for tax purposes. The goodwill value represented 
expected synergies from both AMG 340 and the technologies acquired. 

During the third quarter of 2023, the development of AMG 340 acquired in connection with our Teneobio acquisition was 
terminated.  See  Note  13,  Goodwill  and  other  intangible  assets,  and  Note  18,  Fair  value  measurement,  for  additional 
information.

F-19

 
 
 
 
 
 
 
Acquisition of Five Prime Therapeutics, Inc.

On April 16, 2021, Amgen completed its acquisition of Five Prime for a total cash consideration of $1.6 billion, net of 
cash acquired. The purchase price was funded with cash on hand. This transaction was accounted for as an asset acquisition 
because substantially all the value of the assets acquired was concentrated in the intellectual property rights of bemarituzumab, 
a  Phase  3  first-in-class  program  for  gastric  cancer.  Five  Prime’s  operations  have  been  included  in  our  consolidated  financial 
statements commencing after the acquisition date.

We allocated the consideration to acquire Five Prime to the bemarituzumab IPR&D program of $1.5 billion, which was 
expensed  immediately  in  Acquired  IPR&D  expense  in  the  Consolidated  Statements  of  Income;  deferred  tax  assets  of 
$177 million; and other net liabilities of $47 million. The acquired IPR&D expense was not tax deductible.

Divestiture of Gensenta İlaç Sanayi ve Ticaret A.Ş.

On  November  2,  2022,  we  sold  our  shares  in  Gensenta,  a  subsidiary  in  Turkey,  to  Eczacıbaşı  for  net  cash  proceeds  of 
approximately  $130  million.  The  transaction  was  accounted  for  as  a  sale  of  a  business  and  did  not  meet  the  criteria  to  be 
classified  as  discontinued  operations.  Upon  closing  of  this  transaction,  net  assets  related  to  Gensenta  of  $86  million  were 
divested, and during the year ended December 31, 2022, we recognized a loss on divestiture of $567 million recorded in Other 
operating  expenses  in  the  Consolidated  Statements  of  Income,  primarily  due  to  the  reclassification  of  $615  million  of 
cumulative foreign currency translation losses from AOCI into earnings. See Note 17, Stockholders’ equity.

4. Revenues

We  operate  in  one  business  segment:  human  therapeutics.  Therefore,  results  of  our  operations  are  reported  on  a 
consolidated basis for purposes of segment reporting, consistent with internal management reporting. Revenues by product and 
by geographic area, based on customers’ locations, are presented below. The majority of ROW revenues relates to products sold 
in Europe.

Revenues were as follows (in millions):

Prolia
ENBREL

Otezla

XGEVA

Repatha

Nplate
KYPROLIS

Aranesp

EVENITY
Vectibix

BLINCYTO
TEPEZZA(1)
KRYSTEXXA(1)
Other products(2)
Total product sales(3)
Other revenues

Year ended December 31, 2023

Year ended December 31, 2022

Year ended December 31, 2021

U.S.

ROW

Total

U.S.

ROW

Total

U.S.

ROW

Total

$  2,733  $  1,315  $  4,048  $  2,465  $  1,163  $  3,628  $  2,150  $  1,098  $  3,248 

  3,650 

  1,777 

  1,527 

47 

  3,697 

  4,044 

73 

  4,117 

  4,352 

113 

  4,465 

411 

  2,188 

  1,886 

402 

  2,288 

  1,804 

445 

  2,249 

585 

  2,112 

  1,480 

534 

  2,014 

  1,434 

584 

  2,018 

793 

996 

921 
452 

809 
461 

566 

441 

272 

842 

  1,635 

481 

  1,477 

482 
910 

351 
523 

295 

7 

— 

  1,403 
  1,362 

  1,160 
984 

861 

448 

272 

608 

848 

850 
521 

533 
396 

336 

— 

— 

688 

  1,296 

459 

  1,307 

397 
900 

254 
497 

247 

— 

— 

  1,247 
  1,421 

787 
893 

583 

— 

— 

557 

566 

736 
537 

331 
347 

278 

— 

— 

560 

  1,117 

461 

  1,027 

372 
943 

199 
526 

194 

— 

— 

  1,108 
  1,480 

530 
873 

472 

— 

— 

  3,874 

  1,389 

  5,263 

  3,776 

  1,444 

  5,220 

  4,194 

  1,516 

  5,710 

  19,272 

  7,638 

  26,910 

  17,743 

  7,058 

  24,801 

  17,286 

  7,011 

  24,297 

534 

746 

  1,280 

852 

670 

  1,522 

908 

774 

  1,682 

Total revenues

$ 19,806  $  8,384  $ 28,190  $ 18,595  $  7,728  $ 26,323  $ 18,194  $  7,785  $ 25,979 

____________

(1)  TEPEZZA and KRYSTEXXA were acquired from the acquisition  of Horizon on October 6, 2023, and includes product sales from the acquisition  date 

through December 31, 2023.

(2)  Consists of product sales of our non-principal products, as well as sales prior to the divestiture of our Bergamo and Gensenta subsidiaries in the second 

quarter of 2023 and fourth quarter of 2022, respectively.

(3)  Hedging gains and losses, which are included in product sales, were not material for the years ended December 31, 2023, 2022 and 2021.

F-20

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
In  the  United  States,  we  sell  primarily  to  pharmaceutical  wholesale  distributors  that  we  use  as  the  principal  means  of 
distributing our products to healthcare providers. Outside the United States, we sell principally to healthcare providers and/or 
pharmaceutical  wholesale  distributors  depending  on  the  distribution  practice  in  each  country.  We  monitor  the  financial 
condition  of  our  larger  customers  and  limit  our  credit  exposure  by  setting  credit  limits  and,  in  certain  circumstances,  by 
requiring letters of credit or obtaining credit insurance.

We had product sales to three customers that individually accounted for more than 10% of total revenues for each of the 
years ended December 31, 2023, 2022 and 2021. For the year ended December 31, 2023, on a combined basis, these customers 
accounted for 79% of total gross revenues as shown in the following table. Certain information with respect to these customers 
was as follows (dollar amounts in millions):

McKesson Corporation:

Gross product sales

% of total gross revenues

Cencora, Inc. (formerly AmerisourceBergen Corporation):

Gross product sales

% of total gross revenues

Cardinal Health, Inc.:

Gross product sales

% of total gross revenues

Years ended December 31,

2023

2022

2021

$ 

19,035 

$ 

17,305 

$ 

15,187 

 33 %

 35 %

 33 %

$ 

16,625 

$ 

15,443 

$ 

14,783 

 29 %

 31 %

 32 %

$ 

9,775 

$ 

8,319 

$ 

7,681 

 17 %

 16 %

 17 %

As  of  both  December  31,  2023  and  2022,  amounts  due  from  these  three  customers  each  exceeded  10%  of  gross  trade 
receivables and accounted for 75% of net trade receivables on a combined basis. As of December 31, 2023 and 2022, 22% and 
26%, respectively, of net trade receivables were due from customers located outside the United States, the majority of which 
were from Europe. Our total allowance for doubtful accounts as of December 31, 2023 and 2022, was not material.

5. Stock-based compensation

Our  Amended  2009  Plan  authorizes  for  issuance  to  employees  of  Amgen  and  nonemployee  members  of  our  Board  of 
Directors  shares  of  our  common  stock  pursuant  to  grants  of  equity-based  awards,  including  RSUs,  stock  options  and 
performance units. The pool of shares available under the Amended 2009 Plan is reduced by one share for each stock option 
granted and by 1.9 shares for other types of awards granted, including full-value awards. In general, if any shares subject to an 
award granted under the Amended 2009 Plan expire or become forfeited, terminated or canceled without the issuance of shares, 
the shares subject to such awards are added back into the authorized pool on the same basis that they were removed. In addition, 
under the Amended 2009 Plan, shares withheld to pay for minimum statutory tax obligations with respect to full-value awards 
are added back into the authorized pool on the basis of 1.9 shares. As of December 31, 2023, the Amended 2009 Plan provides 
for future grants and/or issuances of up to approximately 12 million shares of our common stock. Stock-based awards under our 
employee compensation plans are made with newly issued shares reserved for this purpose.

The  following  table  reflects  the  components  of  stock-based  compensation  expense  recognized  in  our  Consolidated 

Statements of Income (in millions):

RSUs

Performance units

Stock options

Total stock-based compensation expense, pretax
Tax benefit from stock-based compensation expense
Total stock-based compensation expense, net of tax

Years ended December 31,

2023

2022

2021

$ 

309  $ 

227  $ 

121 

43 

473 

(102)   

371  $ 

$ 

132 

42 

401 

(86)   

315  $ 

183 

121 

37 

341 

(74) 

267 

F-21

 
 
 
 
 
 
 
 
 
 
Restricted stock units and stock options

Eligible employees generally receive an annual grant of RSUs and, for certain executive-level employees, stock options, 
with  the  size  and  type  of  award  generally  determined  by  the  employee’s  salary  grade  and  performance  level.  Certain 
management  and  professional-level  employees  typically  receive  RSU  grants  upon  commencement  of  employment. 
Nonemployee members of our Board of Directors also receive an annual grant of RSUs.

Our RSU and stock option grants provide for accelerated or continued vesting in certain circumstances as defined in the 
plans and related grant agreements, including upon death, disability, termination in connection with a change in control and the 
retirement  of  employees  who  meet  certain  service  and/or  age  requirements.  RSUs  and  stock  options  generally  vest  in  equal 
amounts on the second, third and fourth anniversaries of the grant date. RSUs accrue dividend equivalents, which are typically 
payable in shares only when and to the extent the underlying RSUs vest and are issued to the recipient.

Restricted stock units

The  grant  date  fair  value  of  an  RSU  equals  the  closing  price  of  our  common  stock  on  the  grant  date,  as  RSUs  accrue 
dividend  equivalents  during  their  vesting  period,  except  with  respect  to  Horizon  replacement  RSUs,  discussed  below.  The 
weighted-average  grant  date  fair  values  per  unit  of  RSUs  granted  (excluding  replacement  awards  granted  to  Horizon  RSU 
holders) during the years ended December 31, 2023, 2022 and 2021, were $237.70, $234.47 and $233.10, respectively.

The following table summarizes information regarding our RSUs:

Balance nonvested as of December 31, 2022

Granted

Replacement awards granted - Horizon acquisition

Vested

Forfeited

Balance nonvested as of December 31, 2023

Year ended December 31, 2023

Units
(in millions)

Weighted-average
grant date
fair value

2.8  $ 

1.0  $ 

1.7  $ 

(1.3)  $ 

(0.3)  $ 

3.9  $ 

228.71 

237.70 

267.47 

231.81 

234.35 

246.43 

Holders  of  Horizon  unvested  RSUs  were  granted  replacement  Amgen  RSUs  under  the  original  terms  of  the  awards  in 
connection  with  the  Horizon  acquisition  based  on  the  terms  of  the  transaction.  See  Note  3,  Acquisitions  and  divestitures. 
Subsequent to the acquisition, $42 million of the RSUs were accelerated and cash settled.

The total grant date fair values of RSUs that vested during the years ended December 31, 2023, 2022 and 2021, were $309 

million, $192 million and $166 million, respectively.

Stock options

The  exercise  price  of  stock  options  is  set  as  the  closing  price  of  our  common  stock  on  the  grant  date,  and  the  related 
number  of  shares  granted  is  fixed  at  that  point  in  time.  Awards  expire  10  years  from  the  date  of  grant.  We  use  the  Black–
Scholes option valuation model to estimate the grant date fair value of stock options.

The weighted-average assumptions used in the option valuation model and the resulting weighted-average grant date fair 

values of stock options granted were as follows:

Closing price of our common stock on grant date

Expected volatility (average of implied and historical volatility)

Expected life (in years)

Risk-free interest rate

Expected dividend yield

Years ended December 31,

2023

2022

2021

$  235.97 

$  230.92 

$  237.17 

 23.3 % 

5.7

 3.4 % 

 3.5 % 

 24.5 %

5.7

 2.8 %

 3.3 %

 25.6 %

5.7

 1.0 %

 2.9 %

Fair value of stock options granted

$  41.86 

$  42.43 

$  40.43 

F-22

 
 
 
 
 
 
The following table summarizes information regarding our stock options:

Year ended December 31, 2023

Options
(in millions)

Weighted-
average
exercise price

Weighted-
average
remaining
contractual
life (in years)

Aggregate
intrinsic
value
(in millions)

Balance unexercised as of December 31, 2022

Granted

Exercised

Expired/forfeited

Balance unexercised as of December 31, 2023

Vested or expected to vest as of December 31, 2023

Exercisable as of December 31, 2023

5.3  $ 

1.1  $ 

(0.4)  $ 

(0.1)  $ 

5.9  $ 

5.7  $ 

2.8  $ 

207.29 

235.97 

182.33 

234.10 

213.90 

213.15 

190.59 

6.7 $ 

6.7 $ 

5.0 $ 

438 

427 

271 

The  total  intrinsic  values  of  options  exercised  during  the  years  ended  December  31,  2023,  2022  and  2021,  were  $33 
million, $67 million and $56 million, respectively. The actual tax benefits realized from tax deductions from option exercises 
during the years ended December 31, 2023, 2022 and 2021, were $7 million, $14 million and $12 million, respectively.

As of December 31, 2023, $498 million of unrecognized compensation cost was related to nonvested RSUs and unvested 

stock options, which is expected to be recognized over a weighted-average period of 1.6 years.

Performance units

Certain management-level employees also receive annual grants of performance units, which give the recipient the right to 
receive  common  stock  that  is  contingent  upon  achievement  of  specified  preestablished  goals  over  the  performance  period, 
which is generally three years. The performance goals for the units granted during the years ended December 31, 2023, 2022 
and 2021, which are accounted for as equity awards, are based on (i) Amgen’s stockholder return compared with a comparator 
group of companies, which are considered market conditions and are therefore reflected in the grant date fair values of the units, 
and  (ii)  Amgen’s  stand-alone  financial  performance  measures,  which  are  considered  performance  conditions.  The  expense 
recognized for awards is based on the grant date fair value of a unit multiplied by the number of units expected to be earned 
with respect to the related performance conditions, net of estimated forfeitures. Depending on the outcome of these performance 
goals, a recipient may ultimately earn a number of units greater or less than the number of units granted. Shares of our common 
stock are issued on a one-for-one basis for each performance unit earned. In general, performance unit awards vest at the end of 
the performance period. The performance award program provides for accelerated or continued vesting in certain circumstances 
as  defined  in  the  plan,  including  upon  death,  disability,  a  change  in  control  and  retirement  of  employees  who  meet  certain 
service and/or age requirements. Performance units accrue dividend equivalents that are typically payable in shares only when 
and to the extent the underlying performance units vest and are issued to the recipient, including with respect to market and 
performance conditions that affect the number of performance units earned.

We  use  a  payout  simulation  model  to  estimate  the  grant  date  fair  value  of  performance  units.  The  weighted-average 
assumptions used in the payout simulation model and the resulting weighted-average grant date fair values of performance units 
granted were as follows:

Years ended December 31,

2023

2022

2021

Closing price of our common stock on grant date

$ 

235.97 

$ 

230.92 

$ 

239.64 

Volatility

Risk-free interest rate

Fair value of units granted

 21.6 %

 3.7 %

 28.1 %

 0.3 %

 29.3 %

 0.3 %

$ 

252.49 

$ 

247.48 

$ 

254.68 

The payout simulation model assumes correlations of returns of the stock prices of our common stock and the common 
stocks of the comparator groups of companies and stock price volatilities of the comparator groups of companies to simulate 
stockholder returns over the performance periods and their resulting impact on the payout percentages based on the contractual 
terms of the performance units.

F-23

 
 
 
 
 
 
 
As of December 31, 2023 and 2022, 1.7 million and 1.6 million performance units were outstanding, respectively, with 
weighted-average grant date fair values per unit of $251.41 and $250.27 per unit, respectively. During the year ended December 
31, 2023, 0.7 million performance units with a weighted-average grant date fair value per unit of $252.49 were granted, and 0.2 
million performance units with a weighted-average grant date fair value per unit of $251.38 were forfeited.

The total fair values of performance units paid during the years ended December 31, 2023, 2022 and 2021, were $109 
million,  $150  million  and  $149  million,  respectively,  based  on  the  number  of  performance  units  earned  multiplied  by  the 
closing stock price of our common stock on the last day of the performance period.

As of December 31, 2023, $146 million of unrecognized compensation cost was related to nonvested performance units, 

which is expected to be recognized over a weighted-average period of one year.

6. Defined contribution plan

The Company has defined contribution plans to which certain employees of the Company and participating subsidiaries 
may  defer  compensation  for  income  tax  purposes.  Participants  are  eligible  to  receive  matching  contributions  based  on  their 
contributions, in addition to other Company contributions. Defined contribution plan expenses were $311 million, $243 million 
and $279 million for the years ended December 31, 2023, 2022 and 2021, respectively.

7. Income taxes

Income before income taxes included the following (in millions):

Domestic

Foreign

Total income before income taxes

The provision for income taxes included the following (in millions):

Current provision:

Federal

State

Foreign

Total current provision

Deferred benefit:

Federal

State

Foreign

Total deferred benefit

Total provision for income taxes

Years ended December 31,

2023

2022

2021

$ 

$ 

4,047  $ 

3,026  $ 

3,808 

4,320 

7,855  $ 

7,346  $ 

1,850 

4,851 

6,701 

Years ended December 31,

2023

2022

2021

$ 

1,524  $ 

1,721  $ 

43 

786 

2,353 

44 

304 

2,069 

(1,124)   

(1,185)   

(25)   

(66)   

(1,215)   

1,138  $ 

(27)   

(63)   

(1,275)   

794  $ 

$ 

865 

18 

359 

1,242 

(308) 

(9) 

(117) 

(434) 

808 

F-24

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred income taxes reflect the tax effect of temporary differences between the carrying amounts of assets and liabilities 
for financial reporting purposes and the amounts used for income tax purposes, tax credit carryforwards and the tax effects of 
NOL carryforwards. As of December 31, 2022, we elected to establish deferred taxes with respect to the U.S. minimum tax on 
the  earnings  of  our  foreign  subsidiaries  for  the  reversal  of  temporary  items  in  future  years.  Significant  components  of  our 
deferred tax assets and liabilities were as follows (in millions):

Deferred income tax assets:

NOL and credit carryforwards

Accrued expenses

Capitalized research and development expenses

Investments

Expenses capitalized for tax

Earnings of foreign subsidiaries

Stock-based compensation

Other

Total deferred income tax assets

Valuation allowance

Net deferred income tax assets

Deferred income tax liabilities:

Acquired intangible assets

Debt

Fixed assets

Fair value of acquired inventory

Investments

Other

Total deferred income tax liabilities

Total deferred income taxes, net

December 31,

2023

2022

$ 

1,465  $ 

1,344 

668 

1,333 

— 

210 

1,260 

159 

416 

5,511 

(957)   

4,554 

584 

515 

270 

211 

192 

104 

317 

3,537 

(718) 

2,819 

(3,028)   

(1,238) 

(268)   

(140)   

(349)   

(99)   

(224)   

$ 

(4,108)   

446  $ 

(272) 

(112) 

(5) 

— 

(249) 

(1,876) 

943 

The  Company  has  determined  that  unremitted  foreign  earnings  are  not  considered  indefinitely  reinvested  to  the  extent 
foreign earnings can be distributed without a significant tax cost. For the amount considered to be indefinitely reinvested, it is 
not practicable to determine the amount of the related deferred income tax liability due to the complexities of the tax laws and 
assumptions we would have to make.

Valuation allowances are provided to reduce the amounts of our deferred tax assets to an amount that is more likely than 
not  to  be  realized  based  on  an  assessment  of  positive  and  negative  evidence,  including  estimates  of  future  taxable  income 
necessary to realize future deductible amounts.

The valuation allowance increased in 2023, primarily driven by the Company’s expectation that certain state R&D credits 

will expire unused as well as acquired state credits and state NOLs not expected to be realized.

As  of  December  31,  2023,  we  had  $201  million  of  federal  tax  credit  carryforwards  available  to  reduce  future  federal 
income taxes and have provided a valuation allowance for $19 million of those federal tax credit carryforwards. The federal tax 
credit carryforwards expire between 2024 and 2044. We had $1.1 billion of state tax credit carryforwards available to reduce 
future state income taxes and have provided a valuation allowance for $971 million of those state tax credit carryforwards. We 
had $84 million of tax credit carryforwards related to our foreign jurisdictions available to offset future foreign income taxes for 
which we have provided $59 million valuation allowance.

As of December 31, 2023, we had $869 million of federal NOL carryforwards available to reduce future federal income 
taxes  and  have  provided  no  valuation  allowance  on  those  federal  NOL  carryforwards.  Additionally,  $691  million  of  those 
federal NOL carryforwards have no expiration; the remainder begin to expire between 2025 and 2037. We had $872 million of 
state  NOL  carryforwards  available  to  reduce  future  state  income  taxes  and  have  provided  a  valuation  allowance  for 

F-25

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$738 million of those state NOL carryforwards. We had $1.3 billion of foreign NOL carryforwards available to reduce future 
foreign income taxes and have provided a valuation allowance for $238 million of those foreign NOL carryforwards. For the 
foreign NOLs with no valuation allowance provided, $243 million have no expiration; and the remainder will expire between 
2024 and 2033.

The reconciliations of the total gross amounts of UTBs were as follows (in millions):

Beginning balance

Additions based on tax positions related to the current year

Additions based on tax positions related to prior years

Reductions for tax positions of prior years

Reductions for expiration of statute of limitations

Settlements 

Ending balance

Years ended December 31,

2023

2022

2021

$ 

3,770  $ 

3,546  $ 

196 

56 

— 

(4)   

(6)   

151 

90 

(14)   

(3)   

— 

3,352 

171 

35 

(4) 

— 

(8) 

$ 

4,012  $ 

3,770  $ 

3,546 

Substantially all of the UTBs as of December 31, 2023, if recognized, would affect our effective tax rate. As a result, we 

remeasured our UTBs accordingly.

Interest and penalties related to UTBs are included in our provision for income taxes. During the years ended December 
31,  2023,  2022  and  2021,  we  recognized  $287  million,  $189  million  and  $98  million,  respectively,  of  interest  and  penalties 
through the income tax provision in the Consolidated Statements of Income. The increase in interest expense for the year ended 
December 31, 2023, was primarily due to higher interest rates during 2023 and acquired positions. As of December 31, 2023 
and 2022, accrued interest and penalties associated with UTBs were $1.4 billion and $1.1 billion, respectively.

The reconciliations between the federal statutory tax rate applied to income before income taxes and our effective tax rate 

were as follows:

Federal statutory tax rate

Foreign earnings

Foreign-derived intangible income

Credits, Puerto Rico excise tax

Interest on uncertain tax positions

Credits, primarily federal R&D

Acquisition IPR&D

Other, net

Effective tax rate

Years ended December 31,

2023

2022

2021

 21.0 %

 (5.1) %

 (1.3) %

 0.3 %

 2.6 %
 (3.5) %

 — %
 0.5 %

 14.5 %

 21.0 %

 (5.6) %

 (1.3) %

 (2.8) %

 1.9 %
 (2.0) %

 — %
 (0.4) %

 10.8 %

 21.0 %

 (7.8) %

 (1.0) %

 (3.4) %

 1.1 %
 (2.1) %

 4.9 %
 (0.6) %

 12.1 %

The  effective  tax  rates  for  the  years  ended  December  31,  2023,  2022  and  2021,  differ  from  the  federal  statutory  rate 
primarily due to impacts of the jurisdictional mix of income and expenses. Substantially all of the benefit to our effective tax 
rate  from  foreign  earnings  results  from  locations  where  the  Company  has  significant  manufacturing  operations,  including 
Singapore, Ireland and Puerto Rico, a territory of the United States that is treated as a foreign jurisdiction for U.S. tax purposes. 
Our  operations  in  Puerto  Rico  are  subject  to  tax  incentive  grants  through  2050.  Additionally,  the  Company’s  operations 
conducted in Singapore are subject to a tax incentive grant through 2036. Our foreign earnings are also subject to U.S. tax at a 
reduced rate of 10.5%.

F-26

 
 
 
 
 
 
 
 
 
 
 
We are no longer subject to a 4% excise tax in the U.S. territory of Puerto Rico on the gross intercompany purchase price 
of  goods  and  services  from  our  manufacturer  in  Puerto  Rico.  As  of  January  1,  2023,  we  qualify  for  and  are  subject  to  the 
alternative income tax rate on industrial development income of our Puerto Rico affiliate. In the United States, this income tax 
qualifies  for  foreign  tax  credits.  Both  this  income  tax  and  the  associated  foreign  tax  credits  are  generally  recognized  in  our 
provision for income taxes. We accounted for the 2022 excise tax that was capitalized in Inventories as an expense in Cost of 
sales when the related products were sold in 2023, and a foreign tax credit was not recognized in 2023 with respect to the excise 
tax.

Income taxes paid during the years ended December 31, 2023, 2022 and 2021, were $3.4 billion, $2.4 billion and $1.9 

billion, respectively.

One or more of our legal entities file income tax returns in the U.S. federal jurisdiction, various U.S. state jurisdictions 
and  certain  foreign  jurisdictions.  Our  income  tax  returns  are  routinely  examined  by  tax  authorities  in  those  jurisdictions. 
Significant disputes can and have arisen with tax authorities involving issues regarding the timing and amount of deductions, 
the  use  of  tax  credits  and  allocations  of  income  and  expenses  among  various  tax  jurisdictions  because  of  differing 
interpretations of tax laws, regulations and relevant facts. Tax authorities, including the IRS, are becoming more aggressive and 
are particularly focused on such matters.

In  2017,  we  received  an  RAR  and  a  modified  RAR  from  the  IRS  for  the  years  2010–2012,  proposing  significant 
adjustments  that  primarily  relate  to  the  allocation  of  profits  between  certain  of  our  entities  in  the  United  States  and  the  U.S. 
territory  of  Puerto  Rico.  We  disagreed  with  the  proposed  adjustments  and  calculations  and  pursued  resolution  with  the  IRS 
appeals  office  but  were  unable  to  reach  resolution.  In  July  2021,  we  filed  a  petition  in  the  U.S.  Tax  Court  to  contest  two 
duplicate Statutory Notices of Deficiency (Notices) for the years 2010–2012 that we received in May and July 2021, which seek 
to  increase  our  U.S.  taxable  income  for  the  years  2010–2012  by  an  amount  that  would  result  in  additional  federal  tax  of 
approximately $3.6 billion plus interest. Any additional tax that could be imposed for the years 2010–2012 would be reduced 
by up to approximately $900 million of repatriation tax previously accrued on our foreign earnings.

In  2020,  we  received  an  RAR  and  a  modified  RAR  from  the  IRS  for  the  years  2013–2015,  also  proposing  significant 
adjustments  that  primarily  relate  to  the  allocation  of  profits  between  certain  of  our  entities  in  the  United  States  and  the  U.S. 
territory of Puerto Rico similar to those proposed for the years 2010–2012. We disagreed with the proposed adjustments and 
calculations and pursued resolution with the IRS appeals office but were unable to reach resolution. In July 2022, we filed a 
petition in the U.S. Tax Court to contest a Notice for the years 2013–2015 that we previously reported receiving in April 2022 
that seeks to increase our U.S. taxable income for the years 2013–2015 by an amount that would result in additional federal tax 
of  approximately  $5.1  billion,  plus  interest.  In  addition,  the  Notice  asserts  penalties  of  approximately  $2.0  billion.  Any 
additional  tax  that  could  be  imposed  for  the  years  2013–2015  would  be  reduced  by  up  to  approximately  $2.2  billion  of 
repatriation tax previously accrued on our foreign earnings.

We firmly believe that the IRS positions set forth in the 2010–2012 and 2013–2015 Notices are without merit. We are 
contesting  the  2010–2012  and  2013–2015  Notices  through  the  judicial  process.  The  two  cases  were  consolidated  in  the  U.S. 
Tax Court on December 19, 2022. On February 10, 2023, the U.S. Tax Court entered an order setting a trial date of November 
4, 2024.

We  are  currently  under  examination  by  the  IRS  for  the  years  2016–2018  with  respect  to  issues  similar  to  those  for  the 

2010 through 2015 period. In addition, we are under examination by a number of state and foreign tax jurisdictions.

Final resolution of these complex matters is not likely within the next 12 months. We continue to believe our accrual for 
income tax liabilities is appropriate based on past experience, interpretations of tax law, application of the tax law to our facts 
and judgments about potential actions by tax authorities; however, due to the complexity of the provision for income taxes and 
uncertain resolution of these matters, the ultimate outcome of any tax matters may result in payments substantially greater than 
amounts accrued and could have a material adverse impact on our consolidated financial statements.

We are no longer subject to U.S. federal income tax examinations for years ended on or before December 31, 2009.

8. Earnings per share

The  computation  of  basic  EPS  is  based  on  the  weighted-average  number  of  our  common  shares  outstanding.  The 
computation of diluted EPS is based on the weighted-average number of our common shares outstanding and dilutive potential 
common shares, which primarily include shares that may be issued under our stock option, restricted stock and performance 
unit award programs (collectively, dilutive securities), as determined by using the treasury stock method.

F-27

The computations for basic and diluted EPS were as follows (in millions, except per-share data):

Income (Numerator):

Net income for basic and diluted EPS

Shares (Denominator):

Weighted-average shares for basic EPS

Effect of dilutive securities

Weighted-average shares for diluted EPS

Basic EPS

Diluted EPS

Years ended December 31,

2023

2022

2021

$ 

6,717  $ 

6,552  $ 

5,893 

535 

3 

538 

538 

3 

541 

$ 

$ 

12.56  $ 

12.49  $ 

12.18  $ 

12.11  $ 

570 

3 

573 

10.34 

10.28 

For each of the three years ended December 31, 2023, the number of antidilutive employee stock-based awards excluded 

from the computation of diluted EPS was not significant.

9. Collaborations

A  collaborative  arrangement  is  a  contractual  arrangement  that  involves  a  joint  operating  activity.  Such  arrangements 
involve two or more parties that are both (i) active participants in the activity and (ii) exposed to significant risks and rewards 
dependent on the commercial success of the activity.

From  time  to  time,  we  enter  into  collaborative  arrangements  for  the  R&D,  manufacture  and/or  commercialization  of 
products and/or product candidates. These collaborations generally provide for nonrefundable upfront license fees, development 
and commercial-performance milestone payments, cost sharing, royalties and/or profit sharing. Our collaboration arrangements 
are performed with no guarantee of either technological or commercial success, and each arrangement is unique in nature. See 
Note  1,  Summary  of  significant  accounting  policies,  for  additional  discussion  of  revenues  recognized  under  these  types  of 
arrangements. Operating expenses for costs incurred pursuant to these arrangements are reported in their respective expense line 
items  in  the  Consolidated  Statements  of  Income,  net  of  any  payments  due  to  or  reimbursements  due  from  our  collaboration 
partners,  with  such  reimbursements  being  recognized  at  the  time  the  party  becomes  obligated  to  pay.  Our  significant 
arrangements are discussed below.

BeiGene, Ltd.

In January 2020, we acquired an equity stake in BeiGene for approximately $2.8 billion in cash as part of a collaboration 
to expand our oncology presence in China. For additional information regarding our equity investment in BeiGene, see Note 10, 
Investments. Under the collaboration, BeiGene began selling XGEVA in 2020, BLINCYTO in 2021 and KYPROLIS in 2022 
in China, and Amgen shares profits and losses equally during the initial product-specific commercialization periods; thereafter, 
product  rights  may  revert  to  Amgen,  and  Amgen  will  pay  royalties  to  BeiGene  on  sales  in  China  of  such  products  for  a 
specified period. Amgen manufactures and supplies the collaboration products to BeiGene.

In addition, we jointly develop a portion of our oncology portfolio with BeiGene, which shares in global R&D costs by 
providing  cash  and  development  services  of  up  to  $1.25  billion.  Upon  regulatory  approval,  BeiGene  will  assume 
commercialization  rights  in  China  for  a  specified  period,  and  Amgen  and  BeiGene  will  share  profits  equally  until  certain  of 
these product rights revert to Amgen. Upon return of the product rights, Amgen will pay royalties to BeiGene on sales in China 
for a specified period. For product sales outside China, Amgen will also pay royalties to BeiGene.

During  the  years  ended  December  31,  2023,  2022  and  2021,  net  costs  recovered  from  BeiGene  for  oncology  product 
candidates were $109 million, $199 million and $220 million, respectively, and were recorded as an offset to R&D expense in 
the Consolidated Statements of Income. During the years ended December 31, 2023, 2022 and 2021, product sales from Amgen 
to BeiGene under the collaboration were $125 million, $64 million and $72 million, respectively, and were recorded in Product 
sales in the Consolidated Statements of Income. During the years ended December 31, 2023, 2022 and 2021, profit and loss 
share expenses related to the initial product-specific commercialization period were $40 million, $53 million and $64 million, 
respectively, and were recorded in SG&A expense in the Consolidated Statements of Income. Amounts owed from BeiGene for 
product sales were $16 million and $6 million as of December 31, 2023 and 2022, respectively, which are included in Trade 
receivables, net, in the Consolidated Balance Sheets. Net amounts owed from BeiGene for cost recoveries and profit and loss 

F-28

 
 
 
 
 
 
 
 
 
share payments were $44 million and $47 million as of December 31, 2023 and 2022, respectively, which are included in Other 
current assets in the Consolidated Balance Sheets.

AstraZeneca plc

We  are  in  a  collaboration  with  AstraZeneca  for  the  development  and  commercialization  of  TEZSPIRE.  Under  our 
collaboration, both companies share global costs, profits and losses equally after payment by AstraZeneca of a mid-single-digit 
royalty to Amgen. AstraZeneca leads global development, and both Amgen and AstraZeneca jointly commercialize TEZSPIRE 
in North America. In North America, Amgen, as the principal, recognizes product sales of TEZSPIRE in the United States, and 
AstraZeneca,  as  the  principal,  recognizes  product  sales  of  TEZSPIRE  in  Canada.  AstraZeneca  leads  commercialization  for 
TEZSPIRE outside North America. Amgen manufactures and supplies TEZSPIRE worldwide.

During the years ended December 31, 2023, 2022 and 2021, net costs due to AstraZeneca for global development were 
$77 million, $74 million and $49 million, respectively, and were recorded in R&D expense in the Consolidated Statements of 
Income. During the years ended December 31, 2023, 2022 and 2021, net costs due to AstraZeneca for global commercialization 
were  $73  million,  $60  million  and  $39  million,  respectively,  and  were  recorded  in  SG&A  expense  in  the  Consolidated 
Statements  of  Income.  During  the  years  ended  December  31,  2023  and  2022,  global  profit  and  loss  share  expenses  were 
$310 million and $119 million, respectively, and were recorded primarily in Cost of sales in the Consolidated Statements of 
Income. TEZSPIRE launched in the United States in January 2022.

UCB

We are in a collaboration with UCB for the development and commercialization of EVENITY. Under our collaboration, 
UCB  has  rights  to  lead  commercialization  for  EVENITY  in  most  countries  in  Europe.  Amgen,  as  the  principal,  leads 
commercialization  for  EVENITY  and  recognizes  product  sales  in  all  other  territories,  including  the  United  States.  Global 
development  costs  and  commercialization  profits  and  losses  related  to  the  collaboration  are  shared  equally.  Amgen 
manufactures and supplies EVENITY worldwide.

During  the  years  ended  December  31,  2023,  2022  and  2021,  global  profit  and  loss  share  expenses  were  $396  million, 
$255 million and $186 million, respectively, and were recorded in Cost of sales in the Consolidated Statements of Income. Net 
costs recovered from and due to UCB during the years ended December 31, 2023, 2022 and 2021, were not material.

Novartis Pharma AG

We  are  in  a  collaboration  with  Novartis  to  jointly  develop  and  commercialize  Aimovig.  On  January  31,  2022,  we 
modified the terms of the collaboration. Effective January 1, 2022, in the United States, Novartis no longer collaborates with 
Amgen,  shares  Aimovig  commercialization  costs  or  is  required  to  pay  milestones,  and  Amgen  no  longer  pays  royalties  to 
Novartis on U.S. sales of Aimovig. Novartis continues to hold global co-development rights and exclusive commercial rights 
outside the United States and Japan for Aimovig. Amgen and Novartis share global development expenses, and Novartis pays 
Amgen double-digit royalties on net sales of the product outside the United States and Japan. Amgen manufactures and supplies 
Aimovig worldwide.

During  the  years  ended  December  31,  2023  and  2022,  net  costs  recovered  from  Novartis  for  migraine  products  were 
$42  million  and  $53  million,  respectively,  and  were  recorded  in  R&D  expense  in  the  Consolidated  Statements  of  Income. 
During  the  year  ended  December  31,  2021,  net  costs  recovered  from  Novartis  for  migraine  products  were  $160  million  and 
were  recorded  primarily  in  SG&A  expense  in  the  Consolidated  Statements  of  Income.  During  the  year  ended  December  31, 
2021,  royalties  due  to  Novartis  for  Aimovig  were  $116  million  and  were  recorded  in  Cost  of  sales  in  the  Consolidated 
Statements of Income. During the years ended December 31, 2023, 2022 and 2021, royalties due from Novartis for Aimovig 
were not material.

Kyowa Kirin Co., Ltd.

We are in a collaboration and licensing agreement with Kyowa Kirin to jointly develop and commercialize rocatinlimab, 
an  anti-OX40  fully  human  monoclonal  antibody,  worldwide,  except  in  Japan.  Rocatinlimab  is  for  the  treatment  of  atopic 
dermatitis, with potential for treatment of other autoimmune diseases.

Under the terms of the agreement, we lead the global development, manufacture and commercialization of rocatinlimab, 
except  in  Japan.  Kyowa  Kirin  will  co-promote  rocatinlimab  with  Amgen  in  the  United  States  and  have  opt  in  rights  to  co-
promote rocatinlimab in various other markets outside the United States, including in Europe and Asia.

F-29

We made an upfront payment of $400 million to Kyowa Kirin that was recognized in R&D expense in the third quarter of 
2021. Amgen and Kyowa Kirin share equally the global development costs, except in Japan, and the U.S. commercialization 
costs.  Outside  the  United  States  and  Japan,  any  commercialization  costs  incurred  by  Kyowa  Kirin  will  be  reimbursed  by 
Amgen.  We  may  also  be  required  to  make  milestone  payments  of  up  to  $850  million  contingent  upon  the  achievement  of 
certain regulatory events and commercial thresholds. We will also pay Kyowa Kirin significant double-digit royalties on global 
sales, except in Japan. During the year ended December 31, 2023, net costs recovered from Kyowa Kirin were $93 million and 
were recorded in R&D expense in the Consolidated Statements of Income. Net costs due to or recovered from Kyowa Kirin 
during the years ended December 31, 2022 and 2021, were not material.

Other

In addition to the collaborations discussed above, we have various other collaborations that are not individually significant 
to our business at this time. Pursuant to the terms of those agreements, we may be required to pay additional amounts, or we 
may receive additional amounts upon the achievement of various development and commercial milestones that in the aggregate 
could be significant. We may also incur or have reimbursed to us significant R&D costs if a related product candidate were to 
advance to late-stage clinical trials. In addition, if any products related to these collaborations are approved for sale, we may be 
required to pay significant royalties, or we may receive significant royalties on future sales. The payments of these amounts, 
however, are contingent upon the occurrence of various future events that have high degrees of uncertainty of occurrence.

10. Investments

Available-for-sale investments

The amortized cost, gross unrealized gains, gross unrealized losses and fair values of interest-bearing securities, which are 

considered available-for-sale, by type of security were as follows (in millions):

Types of securities as of December 31, 2023
U.S. Treasury bills

Money market mutual funds

Other short-term interest-bearing securities

Total available-for-sale investments

Types of securities as of December 31, 2022
U.S. Treasury bills

Money market mutual funds

Other short-term interest-bearing securities

Total available-for-sale investments

Amortized
cost

Gross
unrealized
gains

Gross
unrealized
losses

$ 

—  $ 

—  $ 

—  $ 

10,266 

138 

— 

— 

— 

— 

Fair
values

— 

10,266 

138 

$ 

10,404  $ 

—  $ 

—  $ 

10,404 

Amortized
cost

$ 

1,676  $ 

2,659 

— 
4,335  $ 

$ 

Gross
unrealized
gains

Gross
unrealized
losses

Fair
values

—  $ 

— 

— 
—  $ 

—  $ 

— 

— 
—  $ 

1,676 

2,659 

— 
4,335 

The  fair  values  of  available-for-sale  investments  by  location  in  the  Consolidated  Balance  Sheets  were  as  follows  (in 

millions):

Consolidated Balance Sheets locations
Cash and cash equivalents

Marketable securities

Total available-for-sale investments

December 31,

2023

2022

$ 

$ 

10,404  $ 

— 

10,404  $ 

2,659 

1,676 

4,335 

Cash  and  cash  equivalents  in  the  above  table  excludes  bank  account  cash  of  $540  million  and  $4,970  million  as  of 

December 31, 2023 and 2022, respectively.

All  interest-bearing  securities  as  of  December  31,  2023  and  2022,  mature  in  one  year  or  less.  For  the  years  ended 
December  31,  2023,  2022  and  2021,  interest  income  on  these  investments  were  $1.2  billion,  $127  million  and  $11  million, 
respectively.

F-30

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For the years ended December 31, 2023, 2022 and 2021, realized gains and losses on interest-bearing securities were not 
material.  Realized  gains  and  losses  on  interest-bearing  securities  are  recorded  in  Other  income  (expense),  net,  in  the 
Consolidated Statements of Income. The cost of securities sold is based on the specific-identification method.

The  primary  objective  of  our  investment  portfolio  is  to  maintain  safety  of  principal,  prudent  levels  of  liquidity  and 
acceptable levels of risk. Our investment policy limits interest-bearing security investments to certain types of debt and money 
market  instruments  issued  by  institutions  with  investment-grade  credit  ratings,  and  it  places  restrictions  on  maturities  and 
concentration by asset class and issuer.

Equity securities

BeiGene, Ltd.

On  January  2,  2020,  we  acquired  a  20.5%  ownership  interest  in  BeiGene  for  $2.8  billion,  of  which  $2.6  billion  was 
attributed  to  the  fair  value  of  equity  securities  upon  closing,  with  the  remainder  attributed  to  prepaid  R&D.  Our  equity 
investment  in  BeiGene  is  included  in  Other  noncurrent  assets  in  the  Consolidated  Balance  Sheets.  The  fair  value  of  equity 
securities acquired exceeded our proportionate share of the carrying value of BeiGene’s underlying net assets by $2.4 billion, 
and we began amortizing the intangible assets that gave rise to this basis difference over their useful lives.

Effective January 30, 2023, we relinquished our right to appoint a director to BeiGene’s Board of Directors. We no longer 
have the ability to exert significant influence over BeiGene. As a result, in the first quarter of 2023, we began to account for our 
ownership  interest  as  an  equity  security  with  a  readily  determinable  fair  value,  with  changes  in  fair  value  recorded  in  Other 
income (expense), net, in the Consolidated Statements of Income. See Note 18, Fair value measurement. During the year ended 
December  31,  2023,  we  recognized  an  unrealized  gain  of  $1.2  billion  recorded  in  Other  income  (expense),  net,  in  the 
Consolidated Statements of Income. As of December 31, 2023, the carrying and fair value of our investment in BeiGene was 
$3.4 billion and was included in Other noncurrent assets in the Consolidated Balance Sheets.

During the years ended December 31, 2022 and 2021, under the equity method of accounting, the carrying value of the 
investment was reduced by our share of BeiGene’s net losses of $394 million and $265 million, respectively, and amortization 
of the basis difference of $190 million and $172 million, respectively. During the year ended December 31, 2021, we increased 
the carrying value by $50 million as a result of our purchase of additional shares of BeiGene; we did not purchase additional 
shares of BeiGene during the years ended December 31, 2023 and 2022. In addition, during the years ended December 31, 2022 
and  2021,  the  carrying  value  increased  by  $11  million  and  $265  million,  respectively,  from  the  impact  of  other  BeiGene 
ownership transactions. As of December 31, 2022, the carrying and fair values of our investment in BeiGene were $2.2 billion 
and  $4.2  billion,  respectively,  and  our  ownership  percentage  was  18.2%.  For  information  on  a  collaboration  agreement  we 
entered into with BeiGene in connection with this investment, see Note 9, Collaborations.

Other equity securities 

Excluding  our  equity  investments  in  BeiGene  and  Neumora  (discussed  below),  we  held  investments  in  other  equity 
securities with readily determinable fair values (publicly traded securities) of $494 million and $480 million as of December 31, 
2023 and 2022, respectively, which are included in Other noncurrent assets in the Consolidated Balance Sheets. For the years 
ended  December  31,  2023,  2022  and  2021,  net  unrealized  gains  and  losses  on  publicly  traded  securities  were  a  net  gain  of 
$98 million, a net loss of $165 million and a net gain of $161 million, respectively. Realized gains and losses on publicly traded 
securities for the years ended December 31, 2023, 2022 and 2021, were not material.

We held investments of $309 million and $233 million in equity securities without readily determinable fair values as of 
December 31, 2023 and 2022, respectively, which are included in Other noncurrent assets in the Consolidated Balance Sheets. 
For  the  years  ended  December  31,  2023  and  2022,  gains  due  to  upward  adjustments  and  gains  realized  upon  dispositions  of 
these securities were not material. For the year ended December 31, 2021, gains due to upward adjustments were $152 million, 
and gains realized on the dispositions of these securities were $41 million. For the years ended December 31, 2023 and 2021, 
downward adjustments were not material. For the year ended December 31, 2022, downward adjustments to the carrying values 
of these securities were $67 million. Adjustments were based on observable price transactions.

Equity Method Investments

Neumora Therapeutics, Inc.

  On  September  30,  2021,  we  acquired  an  approximately  25.9%  ownership  interest  in  Neumora,  a  then  privately  held 
company, for $257 million, which is included in Other noncurrent assets in the Consolidated Balance Sheets, in exchange for a 
$100  million  cash  payment  and  $157  million  in  noncash  consideration  primarily  related  to  future  services.  During  the  third 
quarter of 2023, we made an additional $30 million equity investment in Neumora in connection with their initial public stock 
offering, and consequently, our investment now has a readily determinable fair value. Although our equity investment provides 

F-31

us  with  the  ability  to  exercise  significant  influence  over  Neumora  and  therefore  qualifies  us  for  the  equity  method  of 
accounting, we have elected the fair value option to account for our investment. Under the fair value option, changes in the fair 
value  of  the  investment  are  recognized  through  earnings  in  Other  income  (expense),  net,  in  the  Consolidated  Statements  of 
Income each reporting period. We believe the fair value option best reflects the economics of the underlying transaction. As of 
December 31, 2023 and 2022, our ownership interests in Neumora were approximately 23.2% and 24.9%, respectively, and the 
fair values of our investment were $603 million and $335 million, respectively. During the years ended December 31, 2023, 
2022 and 2021, we recognized gains of $238 million and $105 million and a loss of $37 million, respectively, for the change in 
fair values in Other income (expense), net, in the Consolidated Statements of Income. 

For information on determination of fair values, see Note 18, Fair value measurement.

Limited partnerships

We  held  limited  partnership  investments  of  $251  million  and  $249  million  as  of  December  31,  2023  and  2022, 
respectively, which are included in Other noncurrent assets in the Consolidated Balance Sheets. These investments, which are 
primarily  investment  funds  of  early-stage  biotechnology  companies,  are  accounted  for  by  using  the  equity  method  of 
accounting and are measured by using our proportionate share of the net asset values of the underlying investments held by the 
limited  partnerships  as  a  practical  expedient.  These  investments  are  typically  redeemable  only  through  distributions  upon 
liquidation  of  the  underlying  assets.  As  of  December  31,  2023,  unfunded  additional  commitments  to  be  made  for  these 
investments during the next several years were $159 million. For the years ended December 31, 2023, 2022 and 2021, net gains 
and losses recognized from our limited partnership investments were net losses of $14 million and $284 million and a net gain 
of $143 million, respectively.

11. Inventories

Inventories consisted of the following (in millions):

Raw materials

Work in process

Finished goods

Total inventories(1)

____________

December 31,

2023

2022

$ 

$ 

993  $ 

5,747 

2,778 

9,518  $ 

828 

3,098 

1,004 

4,930 

(1) The increase to Inventories was primarily due to the estimated fair value of the acquired inventory from the Horizon acquisition. See Note 3, Acquisitions 

and divestitures.

F-32

 
 
 
 
12. Property, plant and equipment

Property, plant and equipment consisted of the following (dollar amounts in millions):

Land

Buildings and improvements

Manufacturing equipment

Laboratory equipment

Fixed equipment

Capitalized software

Other

Construction in progress

Property, plant and equipment, gross

Less accumulated depreciation and amortization

Property, plant and equipment, net

Useful life (in years)

2023

2022

December 31,

—

10-40

8-12

8-12

12

3-5

5-10

—

$ 

339  $ 

4,507 

3,220 

1,346 

2,526 

1,320 

941 

1,550 

15,749 

(9,808)   

$ 

5,941  $ 

292 

4,201 

3,105 

1,277 

2,478 

1,215 

929 

1,213 

14,710 

(9,283) 

5,427 

During  the  years  ended  December  31,  2023,  2022  and  2021,  we  recognized  depreciation  and  amortization  expense 

associated with our property, plant and equipment of $685 million, $661 million and $644 million, respectively.

Geographic information

Certain geographic information with respect to property, plant and equipment, net (long-lived assets), was as follows (in 

millions):

U.S.

Puerto Rico

ROW

Total property, plant and equipment, net

December 31,

2023

2022

$ 

$ 

3,658  $ 

1,148 

1,135 

5,941  $ 

3,154 

1,247 

1,026 

5,427 

F-33

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
13. Goodwill and other intangible assets

Goodwill

The changes in the carrying amounts of goodwill were as follows (in millions):

Beginning balance

Changes to goodwill resulting from acquisitions and divestitures, net(1)
Currency translation adjustments

Ending balance

____________

December 31,

2023

2022

$ 

15,529  $ 

14,890 

3,089 

11 

651 

(12) 

$ 

18,629  $ 

15,529 

(1)  For 2023, the increase to Goodwill was primarily due to goodwill resulting from the acquisition of Horizon. For 2022, the increase to goodwill was due to 
goodwill resulting from the acquisition of ChemoCentryx, changes to the acquisition date fair values of net assets acquired in the acquisition of Teneobio 
and the nonstrategic Gensenta divestiture. See Note 3, Acquisitions and divestitures.

Other intangible assets

Other intangible assets consisted of the following (in millions):

December 31,

2023

2022

Gross
carrying
amounts

Accumulated
amortization

Other 
intangible
assets, net

Gross
carrying
amounts

Accumulated
amortization

Other 
intangible
assets, net

Finite-lived intangible assets:

Developed-product-technology rights

$ 

48,631  $ 

(18,049)  $ 

30,582  $ 

29,028  $ 

(15,045)  $ 

13,983 

Licensing rights

Marketing-related rights

R&D technology rights

3,865 

1,339 

1,394 

(3,265)   

(1,264)   

(1,228)   

600 

75 

166 

3,864 

1,326 

1,378 

(3,123)   

(1,167)   

(1,190)   

741 

159 

188 

Total finite-lived intangible assets

55,229 

(23,806)   

31,423 

35,596 

(20,525)   

15,071 

Indefinite-lived intangible assets:

IPR&D

1,218 

— 

1,218 

1,009 

— 

1,009 

Total other intangible assets

$ 

56,447  $ 

(23,806)  $ 

32,641  $ 

36,605  $ 

(20,525)  $ 

16,080 

Developed-product-technology rights consists of rights related to marketed products acquired in acquisitions. Licensing 
rights  consists  primarily  of  contractual  rights  acquired  in  acquisitions  to  receive  future  milestone,  royalty  and  profit-sharing 
payments; capitalized payments to third parties for milestones related to regulatory approvals to commercialize products; and 
up-front  payments  associated  with  royalty  obligations  for  marketed  products.  Marketing-related  rights  consists  primarily  of 
rights related to the sale and distribution of marketed products. R&D technology rights pertains to technologies used in R&D 
that  have  alternative  future  uses.  Developed-product-technology  rights  include  assets  acquired  with  the  Horizon  and 
ChemoCentryx  acquisitions.  IPR&D  includes  assets  acquired  with  the  Horizon  and  Teneobio  acquisitions.  R&D  technology 
rights and licensing rights includes assets acquired with the Teneobio acquisition. See Note 3, Acquisitions and divestitures.

F-34

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
IPR&D consists of R&D projects acquired in a business combination that are not complete at the time of acquisition due 
to remaining technological risks and/or lack of receipt of required regulatory approvals. All IPR&D projects have major risks 
and uncertainties associated with the timely and successful completion of the development and commercialization of product 
candidates, including our ability to confirm safety and efficacy based on data from clinical trials, our ability to obtain necessary 
regulatory approvals and our ability to successfully complete these tasks within budgeted costs. We are not permitted to market 
a  human  therapeutic  without  obtaining  regulatory  approvals,  and  such  approvals  require  the  completion  of  clinical  trials  that 
demonstrate  that  a  product  candidate  is  safe  and  effective.  In  addition,  the  availability  and  extent  of  coverage  and 
reimbursement  from  third-party  payers,  including  government  healthcare  programs  and  private  insurance  plans  as  well  as 
competitive product launches, affect the revenues a product can generate. Consequently, the eventual realized values, if any, of 
acquired  IPR&D  projects  may  vary  from  their  estimated  fair  values.  We  review  IPR&D  projects  for  impairment  annually, 
whenever  events  or  changes  in  circumstances  indicate  that  the  carrying  amounts  may  not  be  recoverable  and  upon  the 
establishment of technological feasibility or regulatory approval. During the third quarter of 2023, the development of AMG 
340 acquired in connection with our Teneobio acquisition was terminated, resulting in an impairment charge of $783 million, 
which was recognized in Other operating expenses in the Consolidated Statements of Income and included in Other items, net, 
in the Consolidated Statements of Cash Flows. See Note 18, Fair value measurement, for the impact on the related contingent 
consideration liability.

During the years ended December 31, 2023, 2022 and 2021, we recognized amortization associated with our finite-lived 
intangible  assets  of  $3.2  billion,  $2.6  billion  and  $2.6  billion,  respectively.  Amortization  of  intangible  assets  is  included 
primarily  in  Cost  of  sales  in  the  Consolidated  Statements  of  Income.  The  total  estimated  amortization  for  our  finite-lived 
intangible  assets  for  the  years  ending  December  31,  2024,  2025,  2026,  2027  and  2028,  are  $4.8  billion,  $4.5  billion,  $3.9 
billion, $3.9 billion and $2.9 billion, respectively.

14. Leases

We lease certain facilities and equipment related primarily to R&D, administrative and commercial activities. Leases with 

terms of 12 months or less are expensed as incurred and are not recorded in the Consolidated Balance Sheets.

Most leases include one or more options to renew, with renewal terms that may extend the lease term up to seven years. 
The  exercise  of  lease  renewal  options  is  at  our  sole  discretion.  In  addition,  some  of  our  lease  agreements  include  rental 
payments  adjusted  periodically  for  inflation.  Our  lease  agreements  neither  contain  residual  value  guarantees  nor  impose 
significant restrictions or covenants. We sublease certain real estate to third parties. Our sublease portfolio consists of operating 
leases from former R&D and administrative space.

The following table summarizes information related to our leases, all of which are classified as operating, included in our 

Consolidated Balance Sheets (in millions):

Consolidated Balance Sheets locations

Assets:

Other noncurrent assets

Liabilities:

Accrued liabilities

Other noncurrent liabilities

Total lease liabilities

The components of net lease costs were as follows (in millions): 

December 31,

2023

2022

$ 

$ 

$ 

651  $ 

119  $ 

691 

810  $ 

Lease costs
Operating(1)
Sublease income

Total net lease costs

____________

Years ended December 31,

2023

2022

2021

$ 

$ 

208  $ 

(28)   

180  $ 

218  $ 

(32)   

186  $ 

(1) 

Includes short-term leases and variable lease costs, which were not material for the years ended December 31, 2023, 2022 and 2021.

579 

156 

539 

695 

237 

(38) 

199 

F-35

 
 
 
Maturities of lease liabilities as of December 31, 2023, were as follows (in millions): 

Maturity dates

2024

2025

2026

2027

2028

Thereafter

Total lease payments(1)

Less imputed interest

Present value of lease liabilities

____________

Amounts

138 

121 

109 

95 

74 

440 

977 

(167) 

810 

$ 

$ 

(1) 

Includes  future  rental  commitments  for  abandoned  leases  of  $67  million.  We  expect  to  receive  total  future  rental  income  of  $70  million  related  to 
noncancellable subleases for abandoned facilities.

The weighted-average remaining lease terms and weighted-average discount rates were as follows:

Weighted-average remaining lease term (in years)

Weighted-average discount rate

Cash and noncash information related to our leases was as follows (in millions): 

December 31,

2023

2022

9.7

 3.6 %

8.2

 2.7 %

Years ended December 31,

2023

2022

2021

Cash paid for amounts included in the measurement of lease 
liabilities:

Operating cash flows for operating leases

ROU assets obtained in exchange for lease obligations:

Operating leases

$ 

$ 

182  $ 

171  $ 

245  $ 

191  $ 

190 

340 

As of December 31, 2023, there were no future lease payments for leases that have not yet commenced.

F-36

 
 
 
 
 
 
 
15. Other current assets and accrued liabilities

Other current assets consisted of the following (in millions):

Prepaid expenses

Corporate partner receivables

Tax receivables

Other

Total other current assets

Accrued liabilities consisted of the following (in millions):

Sales deductions

Income taxes payable

Employee compensation and benefits

Dividends payable

Accrued interest payable

Other

Total accrued liabilities

December 31,

2023

2022

$ 

1,647  $ 

1,204 

502 

172 

281 

700 

129 

355 

$ 

2,602  $ 

2,388 

December 31,

2023

2022

$ 

7,271  $ 

1,664 

1,381 

1,205 

936 

2,902 

$ 

15,359  $ 

5,986 

1,195 

1,099 

1,137 

470 

2,637 

12,524 

F-37

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
16. Financing arrangements

Our borrowings consisted of the following (in millions):

0.41% CHF700 million bonds due 2023 (0.41% 2023 Swiss franc Bonds)
2.25% notes due 2023 (2.25% 2023 Notes)
3.625% notes due 2024 (3.625% 2024 Notes)
1.90% notes due 2025 (1.90% 2025 Notes)
5.25% notes due 2025 (5.25% 2025 Notes)
Term loan due April 2025
3.125% notes due 2025 (3.125% 2025 Notes)
2.00% €750 million notes due 2026 (2.00% 2026 euro Notes)
5.507% notes due 2026 (5.507% 2026 Notes)
2.60% notes due 2026 (2.60% 2026 Notes)
Term loan due October 2026
5.50% £475 million notes due 2026 (5.50% 2026 pound sterling Notes)
2.20% notes due 2027 (2.20% 2027 Notes)
3.20% notes due 2027 (3.20% 2027 Notes)
5.15% notes due 2028 (5.15% 2028 Notes)
1.65% notes due in 2028 (1.65% 2028 Notes)
3.00% notes due 2029 (3.00% 2029 Notes)
4.05% notes due 2029 (4.05% 2029 Notes)
4.00% £700 million notes due 2029 (4.00% 2029 pound sterling Notes)
2.45% notes due 2030 (2.45% 2030 Notes)
5.25% notes due 2030 (5.25% 2030 Notes)
2.30% notes due 2031 (2.30% 2031 Notes)
2.00% notes due 2032 (2.00% 2032 Notes)
3.35% notes due 2032 (3.35% 2032 Notes)
4.20% notes due 2033 (4.20% 2033 Notes)
5.25% notes due 2033 (5.25% 2033 Notes)
6.375% notes due 2037 (6.375% 2037 Notes)
6.90% notes due 2038 (6.90% 2038 Notes)
6.40% notes due 2039 (6.40% 2039 Notes)
3.15% notes due 2040 (3.15% 2040 Notes)
5.75% notes due 2040 (5.75% 2040 Notes)
2.80% notes due 2041 (2.80% 2041 Notes)
4.95% notes due 2041 (4.95% 2041 Notes)
5.15% notes due 2041 (5.15% 2041 Notes)
5.65% notes due 2042 (5.65% 2042 Notes)
5.60% notes due 2043 (5.60% 2043 Notes)
5.375% notes due 2043 (5.375% 2043 Notes)
4.40% notes due 2045 (4.40% 2045 Notes)
4.563% notes due 2048 (4.563% 2048 Notes)
3.375% notes due 2050 (3.375% 2050 Notes)
4.663% notes due 2051 (4.663% 2051 Notes)
3.00% notes due 2052 (3.00% 2052 Notes)
4.20% notes due 2052 (4.20% 2052 Notes)
4.875% notes due 2053 (4.875% 2053 Notes)

F-38

$ 

December 31,

2023

2022

—  $ 
— 
1,400 
500 
2,000 
2,000 
1,000 
828 
1,500 
1,250 
2,000 
605 
1,724 
1,000 
3,750 
1,234 
750 
1,250 
892 
1,250 
2,750 
1,250 
1,001 
1,000 
750 
4,250 
478 
254 
333 
1,803 
373 
949 
600 
729 
415 
2,750 
185 
2,250 
1,415 
2,132 
3,541 
999 
950 
1,000 

757 
750 
1,400 
500 
— 
— 
1,000 
803 
— 
1,250 
— 
574 
1,724 
1,000 
— 
1,234 
750 
1,250 
846 
1,250 
— 
1,250 
1,051 
1,000 
750 
— 
478 
254 
333 
2,000 
373 
1,110 
600 
729 
415 
— 
185 
2,250 
1,415 
2,250 
3,541 
1,254 
1,000 
1,000 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5.65% notes due 2053 (5.65% 2053 Notes)
2.77% notes due 2053 (2.77% 2053 Notes)
4.40% notes due 2062 (4.40% 2062 Notes)
5.75% notes due 2063 (5.75% 2063 Notes)
Other notes due 2097
Unamortized bond discounts, premiums and issuance costs, net
Fair value adjustments
Other

Total carrying value of debt

Less current portion

Total long-term debt

December 31,

2023

2022

4,250 
940 
1,200 
2,750 
100 
(1,420)   
(314)   
17 
64,613 
(1,443)   
63,170  $ 

— 
940 
1,250 
— 
100 
(1,246) 
(437) 
12 
38,945 
(1,591) 
37,354 

$ 

There  are  no  material  differences  between  the  effective  interest  rates  and  the  coupon  rates  of  any  of  our  borrowings, 
except for the 4.563% 2048 Notes, the 4.663% 2051 Notes and the 2.77% 2053 Notes, which have effective interest rates of 
6.3%, 5.6% and 5.2%, respectively.

Under  the  terms  of  all  of  our  outstanding  notes,  except  our  Other  notes  due  2097,  in  the  event  of  a  change-in-control 
triggering event we may be required to purchase all or a portion of these debt securities at prices equal to 101% of the principal 
amounts of the notes plus accrued and unpaid interest. In addition, all of our outstanding notes—except our Other notes due 
2097—may be redeemed at any time at our option—in whole or in part—at the principal amounts of the notes being redeemed 
plus  accrued  and  unpaid  interest  and  make-whole  amounts,  which  are  defined  by  the  terms  of  the  notes.  Certain  of  the 
redeemable  notes  do  not  require  the  payment  of  make-whole  amounts  if  redeemed  during  a  specified  period  of  time 
immediately prior to the maturity of the notes. Such time periods range from one month to six months prior to maturity, except 
for the 5.507% 2026 Notes, which may be redeemed without payment of the make-whole amount if redemption occurs after 
two years prior to maturity.

Debt issuances and acquisition-related financing

In March 2023, in connection with the acquisition of Horizon (see Note 3, Acquisitions and divestitures—Acquisition of 

Horizon Therapeutics plc), we issued the following series of notes (in millions):

5.25% 2025 Notes

5.507% 2026 Notes

5.15% 2028 Notes
5.25% 2030 Notes
5.25% 2033 Notes

5.60% 2043 Notes

5.65% 2053 Notes

5.75% 2063 Notes

Total

$ 

Principal Amount

2,000 

1,500 

3,750 
2,750 
4,250 

2,750 

4,250 

2,750 

$ 

24,000 

In  December  2022,  in  connection  with  the  acquisition  of  Horizon,  we  entered  into  a  bridge  credit  agreement,  which 
provided  for  borrowings  with  an  aggregate  principal  amount  of  $24.5  billion  as  of  December  31,  2022.  Subsequent  to  our 
March 2023 debt issuance described above, we terminated the bridge credit agreement. Accordingly, during the first quarter of 
2023,  we  recognized  $98  million  of  financing  cost  associated  with  the  bridge  credit  agreement,  primarily  in  Other  income 
(expense), net, in the Consolidated Statements of Income.

Also in connection with the acquisition of Horizon, we entered into a $4.0 billion term loan credit agreement in December 
2022. In October 2023, in connection with the completion of the acquisition of Horizon, we borrowed $4.0 billion under the 
term loan credit agreement with an interest rate of three-month SOFR plus 1.225%, of which $2.0 billion is due in April 2025 
and $2.0 billion is due in October 2026. No amounts under this agreement were outstanding as of December 31, 2022.

F-39

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
During the years ended December 31, 2022 and 2021, we issued debt securities in the following offerings:

•

•

In 2022, we issued $7.0 billion of debt consisting of $750 million of the 3.00% 2029 Notes, $1.25 billion of the 4.05% 
2029 Notes, $1.0 billion of the 3.35% 2032 Notes, $750 million of the 4.20% 2033 Notes, $1.0 billion of the 4.20% 2052 
Notes, $1.0 billion of the 4.875% 2053 Notes and $1.25 billion of the 4.40% 2062 Notes. The 3.00% 2029 Notes were 
issued and used to finance eligible projects that met specified criteria to reduce our impact on the environment.

In 2021, we issued $5.0 billion of debt consisting of $1.25 billion of the 1.65% 2028 Notes, $1.25 billion of the 2.00% 
2032 Notes, $1.15 billion of the 2.80% 2041 Notes and $1.35 billion of the 3.00% 2052 Notes. 

Debt extinguishment

In 2023, we repurchased portions of the 2.00% 2032 Notes, 3.15% 2040 Notes, 2.80% 2041 Notes, 3.375% 2050 Notes, 
3.00%  2052  Notes,  4.20%  2052  Notes  and  4.40%  2062  Notes  for  an  aggregate  cost  of  $647  million,  which  resulted  in  the 
recognition  of  a  $225  million  gain  on  extinguishment  of  debt  recorded  in  Other  income  (expense),  net,  in  the  Consolidated 
Statements of Income.

In  2022,  we  repurchased  portions  of  the  2.20%  2027  Notes,  the  1.65%  2028  Notes,  the  2.00%  2032  Notes,  the  2.80% 
2041 Notes and the 3.00% 2052 Notes for an aggregate cost of $297 million, which resulted in the recognition of a $78 million 
gain on extinguishment of debt recorded in Other income (expense), net, in the Consolidated Statements of Income.

Debt repayments/redemptions

•

•

•

We made debt repayments/redemptions during the years ended December 31, 2023, 2022 and 2021, as follows:

In  2023,  we  repaid  $750  million  aggregate  principal  amount  of  the  2.25%  2023  Notes  as  well  as  the  CHF700  million 
aggregate principal amount ($704 million upon settlement of the related cross-currency swap) of the 0.41% 2023 Swiss 
franc Bonds.

In 2022, no debt was repaid/redeemed.

In  2021,  we  redeemed  $4.2  billion  of  debt,  including  the  €1.25  billion  aggregate  principal  amount  ($1.4  billion  upon 
settlement of the related cross-currency swap) of the 1.25% 2022 euro Notes, the $500 million aggregate principal amount 
of  the  2.70%  2022  Notes,  the  $1.5  billion  aggregate  principal  amount  of  the  2.65%  2022  Notes  and  the  $750  million 
aggregate principal amount of the 3.625% 2022 Notes. In connection with the redemption of these notes, we paid a total 
of $24 million in make-whole amounts plus associated accrued and unpaid interest, all of which was recognized in Interest 
expense, net, in the Consolidated Statements of Income.

Interest rate swaps

To achieve a desired mix of fixed-rate and floating-rate debt, we entered into interest rate swap contracts that effectively 
converted  fixed-rate  interest  coupons  for  certain  of  our  debt  issuances  to  floating  SOFR-based  coupons  over  the  lives  of  the 
respective notes. These interest rate swap contracts qualified and are designated as fair value hedges.

During the year ended December 31, 2021, we entered into interest rate swap contracts with an aggregate notional amount 
of  $1.0  billion  with  respect  to  the  2.45%  2030  Notes  and  an  aggregate  notional  amount  of  $500  million  with  respect  to  the 
2.30% 2031 Notes. In connection with the redemption of the 3.625% 2022 Notes, discussed above, associated interest rate swap 
contracts with an aggregate notional amount of $750 million were terminated.

F-40

As of December 31, 2023 and 2022, the effective interest rates on notes for which we have entered into interest rate swap 

contracts and the related notional amounts of these contracts were as follows (dollar amounts in millions):

Notes

3.625% 2024 Notes

3.125% 2025 Notes

2.60% 2026 Notes

2.45% 2030 Notes

2.30% 2031 Notes

4.663% 2051 Notes

Total notional amounts

Cross-currency swaps

Notional amounts

Effective interest 
rates

SOFR + 3.4%

SOFR + 2.1%

SOFR + 2.1%

SOFR + 1.3%

1,400 

1,000 

1,250 

1,000 

500 

SOFR + 1.1%

SOFR + 4.3%

1,500 

6,650 

$ 

$ 

To hedge our exposure to foreign currency exchange rate risk associated with certain of our long-term notes denominated 
in  foreign  currencies,  we  entered  into  cross-currency  swap  contracts.  The  terms  of  these  contracts  outstanding  as  of 
December 31, 2023, effectively convert the interest payments and principal repayments on our 2.00% 2026 euro Notes, 5.50% 
2026 pound sterling Notes and 4.00% 2029 pound sterling Notes from euros and pounds sterling to U.S. dollars. These cross-
currency swap contracts have been designated as cash flow hedges. For information regarding the terms of these contracts, see 
Note  19,  Derivative  instruments.  Cross-currency  swap  contracts  associated  with  other  foreign  denominated  debt  previously 
outstanding were settled in connection with the repayment/redemption of such debt, as discussed above.

Shelf registration statement and other facilities

As of December 31, 2023, we have a commercial paper program that allows us to issue up to $2.5 billion of unsecured 
commercial  paper  to  fund  our  working-capital  needs.  As  of  December  31,  2023  and  2022,  we  had  no  amounts  outstanding 
under our commercial paper program.

In the first quarter of 2023, we amended and restated our syndicated, unsecured, revolving credit agreement, under which 
we  may  borrow  up  to  $4.0  billion  (increased  from  $2.5  billion  prior  to  the  amendment)  for  general  corporate  purposes, 
including as a liquidity backstop for our commercial paper program. The commitments under the revolving credit agreement 
may be increased by up to $1.25 billion with the agreement of the banks (increased from $750 million prior to the amendment). 
Each bank that is a party to the agreement has an initial commitment term of five years. This term may be extended for up to 
two additional one-year periods with the agreement of the banks. Annual commitment fees for this agreement are 0.09% of the 
unused  portion  of  the  facility  based  on  our  current  credit  rating.  Generally,  we  would  be  charged  interest  for  any  amounts 
borrowed  under  this  facility,  based  on  our  current  credit  rating,  at  (i)  SOFR  plus  1.01%  or  (ii)  the  highest  of  (A)  the 
administrative  agent  bank  base  commercial  lending  rate,  (B)  the  overnight  federal  funds  rate  plus  0.50%  or  (C)  one-month 
SOFR plus 1.1%. As of December 31, 2023 and 2022, no amounts were outstanding under this facility.

In February 2023, we filed a shelf registration statement with the SEC that allows us to issue unspecified amounts of debt 
securities; common stock; preferred stock; warrants to purchase debt securities, common stock, preferred stock or depositary 
shares;  rights  to  purchase  common  stock  or  preferred  stock;  securities  purchase  contracts;  securities  purchase  units;  and 
depositary shares. Under this shelf registration statement, all of the securities available for issuance may be offered from time to 
time, with terms to be determined at the time of issuance. This shelf registration statement expires in February 2026.

Certain  of  our  financing  arrangements  contain  nonfinancial  covenants.  In  addition,  our  revolving  credit  agreement  and 
term loan agreement include a financial covenant, which requires us to maintain a specified minimum interest coverage ratio of 
(i)  the  sum  of  consolidated  net  income,  interest  expense,  provision  for  income  taxes,  depreciation  expense,  amortization 
expense,  unusual  or  nonrecurring  charges  and  other  noncash  items  (Consolidated  EBITDA)  to  (ii)  Consolidated  Interest 
Expense,  each  as  defined  and  described  in  the  respective  agreements.  We  were  in  compliance  with  all  applicable  covenants 
under these arrangements as of December 31, 2023.

F-41

 
 
 
 
 
Contractual maturities of debt obligations

The aggregate contractual maturities of all borrowings due subsequent to December 31, 2023, are as follows (in millions):

Maturity dates

2024

2025
2026

2027

2028

Thereafter

Total

Interest costs

Amounts

1,403 

5,500 

6,183 

2,724 

4,984 

45,553 

66,347 

$ 

$ 

Interest costs are expensed as incurred except to the extent such interest is related to construction in progress, in which 
case interest is capitalized. Interest costs capitalized for the years ended December 31, 2023, 2022 and 2021, were not material. 
Interest paid, including the ongoing impact of interest rate and cross-currency swap contracts, during the year ended December 
31, 2023 was $2.4 billion, and for each of the years ended December 31, 2022 and 2021 was $1.2 billion.

17. Stockholders’ equity

Stock repurchase program

Activity under our stock repurchase program, on a trade date basis, was as follows (in millions):

First quarter

Second quarter

Third quarter

Fourth quarter

Total stock repurchases

Years ended December 31,

2023

2022

2021

Shares

Dollars

Shares

Dollars

Shares

Dollars

—  $ 

— 

— 

— 

—  $ 

— 

— 

— 

— 

— 

24.6  $ 

5,410 

3.7  $ 

865 

— 

1.5 

— 

— 

900 

— 

6.5 

4.6 

6.9 

1,592 

1,069 

1,461 

26.1 $ 

6,310 

21.7 $ 

4,987 

During the year ended December 31, 2023, we did not repurchase shares of our common stock.

During  the  first  quarter  of  2022,  the  Company  entered  into  ASR  agreements  with  third-party  financial  institutions 
(Dealers) whereby the Company made payments in an aggregate amount of $6.0 billion to the Dealers and received and retired 
an  initial  23.3  million  shares  of  the  Company’s  common  stock  from  the  Dealers;  during  the  third  quarter  of  2023,  the  ASR 
agreements were settled. In total, we repurchased 26.1 million shares of common stock during the year ended December 31, 
2022, consisting primarily of the 24.8 million shares received under the ASR agreements.

As of December 31, 2023, $7.0 billion remained available under our stock repurchase program. 

Dividends

Our Board of Directors declared quarterly dividends per share of $2.13, $1.94 and $1.76, which were paid in each of the 

four quarters of 2023, 2022 and 2021, respectively.

Historically, we have declared dividends in December of each year, which were paid in the first quarter of the following 
fiscal year and in March, July and October, which were paid in the second, third and fourth quarters, respectively, of the same 
fiscal year. Additionally, on December 12, 2023, the Board of Directors declared a quarterly cash dividend of $2.25 per share of 
common  stock,  which  will  be  paid  in  March  2024,  to  all  stockholders  of  record  as  of  the  close  of  business  on  February  16, 
2024.

F-42

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Accumulated other comprehensive loss

The components of AOCI were as follows (in millions):

Foreign
currency
translation

Cash flow
hedges

Available-for-
sale
securities

Other

AOCI

Balance as of December 31, 2020

$ 

Foreign currency translation adjustments

(709)  $ 

(135)   

Unrealized gains (losses)

Reclassification adjustments to income

Other gains

Income taxes

Balance as of December 31, 2021

Foreign currency translation adjustments

Unrealized gains

Reclassification adjustments to income

Other gains

Income taxes

— 

— 

— 

— 

(844)   

496 

— 

— 

— 

— 

Balance as of December 31, 2022

(348)   

Foreign currency translation adjustments

Unrealized gains

Reclassification adjustments to income

Other gains

Income taxes

50 

— 

— 

— 

— 

(263)  $ 

— 

159 

253 

— 

(88)   

61 

— 

84 

2 

— 

(19)   

128 

— 

28 

(222)   

— 

44 

1  $ 

— 

(1)   

— 

— 

— 

— 

— 

— 

— 

— 

— 

— 

— 

— 

— 

— 

— 

(14)  $ 

— 

— 

— 

1 

— 

(13)   

— 

— 

— 

2 

— 

(11)   

— 

— 

— 

42 

— 

(985) 

(135) 

158 

253 

1 

(88) 

(796) 

496 

84 

2 

2 

(19) 

(231) 

50 

28 

(222) 

42 

44 

Balance as of December 31, 2023

$ 

(298)  $ 

(22)  $ 

—  $ 

31  $ 

(289) 

With  respect  to  the  table  above,  income  tax  expenses  or  benefits  for  unrealized  gains  and  losses  and  the  related 
reclassification adjustments to income for cash flow hedges were a $6 million expense and a $50 million benefit in 2023, a $19 
million expense and a $0 million expense in 2022 and a $33 million expense and a $55 million expense in 2021, respectively. 

Reclassifications out of AOCI and into earnings were as follows (in millions):

Components of AOCI

Cash flow hedges:

Foreign currency contract gains (losses)
Cross-currency swap contract gains (losses)

$ 

Years ended December 31,

2023

2022

2021

Consolidated Statements of Income locations

180  $ 
42 

222 

(50)   

231  $ 
(233)   

(8)  Product sales

(245)  Other income (expense), net

(2)   

(253)  Income before income taxes

— 

55  Provision for income taxes

$ 

172  $ 

(2)  $ 

(198)  Net income

Other

In addition to common stock, our authorized capital includes 5 million shares of preferred stock, $0.0001 par value. As of 

December 31, 2023 and 2022, no shares of preferred stock were issued or outstanding.

18. Fair value measurement

To  estimate  the  fair  value  of  our  financial  assets  and  liabilities,  we  use  valuation  approaches  within  a  hierarchy  that 
maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be 
used when available. Observable inputs are inputs that market participants would use in pricing an asset or liability based on 
market  data  obtained  from  sources  independent  of  the  Company.  Unobservable  inputs  are  inputs  that  reflect  the  Company’s 
assumptions about the inputs that market participants would use in pricing an asset or liability and are developed based on the 

F-43

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
best  information  available  in  the  circumstances.  The  fair  value  hierarchy  is  divided  into  three  levels  based  on  the  source  of 
inputs as follows:

Level 1 — Valuations based on unadjusted quoted prices in active markets for identical assets or liabilities that the Company 

has the ability to access

Level 2 — Valuations for which all significant inputs are observable either directly or indirectly—other than Level 1 inputs

Level 3 — Valuations based on inputs that are unobservable and significant to the overall fair value measurement

The availability of observable inputs can vary among the various types of financial assets and liabilities. To the extent that 
the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value 
requires more judgment. In certain cases, the inputs used for measuring fair value may fall into different levels of the fair value 
hierarchy. In such cases, for financial statement disclosure purposes, the level in the fair value hierarchy within which the fair 
value  measurement  is  categorized  is  based  on  the  lowest  level  of  input  used  that  is  significant  to  the  overall  fair  value 
measurement.

The fair values of each major class of the Company’s financial assets and liabilities measured at fair value on a recurring 

basis were as follows (in millions):

Fair value measurement as of December 31, 2023, using:

Assets:

Available-for-sale securities:

U.S. Treasury bills

Money market mutual funds

Other short-term interest-bearing securities

Other investments

Equity securities

Derivatives:

Foreign currency forward contracts

Cross-currency swap contracts

Interest rate swap contracts

Total assets

Liabilities:

Derivatives:
Foreign currency forward contracts

Cross-currency swap contracts
Interest rate swap contracts

Forward interest rate contracts

Contingent consideration obligations 

Quoted prices in
active markets for
identical assets
(Level 1)

Significant other
observable
inputs
(Level 2)

Significant
unobservable
inputs
(Level 3)

Total

$ 

—  $ 

—  $ 

—  $ 

10,266 

— 

— 

4,514 

— 

— 

— 

— 

138 

— 

— 

145 

— 

— 

— 

— 

— 

— 

— 

— 

— 

— 

10,266 

138 

— 

4,514 

145 

— 

— 

$ 

$ 

14,780  $ 

283  $ 

—  $ 

15,063 

—  $ 

116  $ 

—  $ 

— 
— 

— 

— 

405 
571 

— 

— 

— 
— 

— 

96 

116 

405 
571 

— 

96 

Total liabilities

$ 

—  $ 

1,092  $ 

96  $ 

1,188 

F-44

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1,676 

2,659 

— 

130 

815 

287 

54 

5,621 

76 

541 

776 

5 

270 

Fair value measurement as of December 31, 2022, using:

Assets:

Available-for-sale securities:

U.S. Treasury bills

Money market mutual funds

Other short-term interest-bearing securities

Other investments

Equity securities

Derivatives:

Foreign currency forward contracts

Cross-currency swap contracts

Quoted prices in
active markets for
identical assets
(Level 1)

Significant other
observable
inputs
(Level 2)

Significant
unobservable
inputs
(Level 3)

Total

$ 

1,676  $ 

—  $ 

—  $ 

2,659 

— 

— 

480 

— 

— 

— 

— 

130 

— 

287 

54 

— 

— 

— 

335 

— 

— 

Total assets

$ 

4,815  $ 

471  $ 

335  $ 

Liabilities:

Derivatives:

Foreign currency forward contracts

$ 

—  $ 

76  $ 

—  $ 

Cross-currency swap contracts

Interest rate swap contracts

Forward interest rate contracts

Contingent consideration obligations

— 

— 

— 

— 

541 

776 

5 

— 

— 

— 

— 

270 

Total liabilities

$ 

—  $ 

1,398  $ 

270  $ 

1,668 

Interest-bearing and equity securities

The  fair  values  of  our  U.S.  Treasury  securities,  money  market  mutual  funds  and  equity  investments  in  publicly  traded 
securities, including our equity investments in BeiGene and Neumora, as of December 31, 2023, are based on quoted market 
prices in active markets, with no valuation adjustment. Previously, the fair value of our equity investment in Neumora did not 
have  a  readily  determinable  fair  value  and  was  initially  valued  at  the  acquisition  price  and  subsequently  valued  based  on  a 
combination of observable price transactions when available, market performance and publicly available market information for 
similar  companies  that  have  actively  traded  equity  securities.  During  the  third  quarter  of  2023,  Neumora  became  a  publicly 
traded company, and its equity securities now have a readily determinable fair value. Accordingly, the fair value inputs of our 
equity  investment  in  Neumora  changed  from  using  Level  3  inputs  as  of  December  31,  2022,  to  using  a  Level  1  input  as  of 
December 31, 2023. See Note 10, Investments— Neumora Therapeutics, Inc.

As of the first quarter of 2023, we no longer account for our equity investment in BeiGene under the equity method of 
accounting. As of December 31, 2022, the fair value and carrying value were $4.2 billion and $2.2 billion, respectively, with 
the fair value estimated by using a Level 1 input. See Note 10, Investments—BeiGene, Ltd.

F-45

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Derivatives

Our  foreign  currency  forward  contracts,  cross-currency  swap  contracts  and  interest  rate  swap  contracts  are  with 
counterparties that have minimum credit ratings of A– or equivalent by S&P, Moody’s or Fitch. We estimate the fair values of 
these contracts by taking into consideration valuations obtained from a third-party valuation service that uses an income-based 
industry-standard valuation model for which all significant inputs are observable either directly or indirectly. These inputs, as 
applicable,  include  foreign  currency  exchange  rates,  LIBOR,  SOFR,  swap  rates,  obligor  credit  default  swap  rates  and  cross-
currency basis swap spreads. Certain inputs, when applicable, are at commonly quoted intervals. Starting in the third quarter of 
2023, terms under our existing derivative contracts reference the SOFR benchmark consistent with the ISDA protocol. See Note 
19, Derivative instruments.

Contingent consideration obligations

As a result of our business acquisitions, we have incurred contingent consideration obligations as discussed below. The 
contingent consideration obligations are recorded at their fair values by using probability-adjusted discounted cash flows, and 
we  revalue  these  obligations  each  reporting  period  until  the  related  contingencies  have  been  resolved.  The  fair  value 
measurements  of  these  obligations  are  based  on  significant  unobservable  inputs  related  to  licensing  rights  and  product 
candidates  acquired  in  business  combinations,  and  they  are  reviewed  quarterly  by  management  in  our  R&D  and  commercial 
sales  organizations.  The  inputs  include,  as  applicable,  estimated  probabilities  and  the  timing  of  achieving  specified 
development,  regulatory  and  commercial  milestones  as  well  as  estimated  annual  sales.  Significant  changes  that  increase  or 
decrease the probabilities of achieving the related development, regulatory and commercial events or that shorten or lengthen 
the  time  required  to  achieve  such  events  or  that  increase  or  decrease  estimated  annual  sales  would  result  in  corresponding 
increases or decreases in the fair values of the obligations, as applicable. Changes in the fair values of contingent consideration 
obligations are recognized in Other operating expenses in the Consolidated Statements of Income.

Changes in the carrying amounts of contingent consideration obligations were as follows (in millions):

Beginning balance

Additions

Payments

Net changes in valuations

Ending balance

Years ended December 31,

2023

2022

2021

$ 

270  $ 

342  $ 

— 

(9)   

(165)   

— 

(7)   

(65)   

33 

309 

(7) 

7 

$ 

96  $ 

270  $ 

342 

As of December 31, 2023 and 2022, our contingent consideration obligations are primarily the result of our acquisition of 
Teneobio  in  October  2021,  which  obligated  us  to  pay  the  former  shareholders  up  to  $1.6  billion  upon  achieving  separate 
development  and  regulatory  milestones  with  regard  to  various  R&D  programs.  See  Note  3,  Acquisitions  and  divestitures. 
During the third quarter of 2023, the development of AMG 340 was terminated, resulting in a decrease of the related contingent 
consideration liability. The remeasurement of this liability of $165 million was recognized in Other operating expenses in the 
Consolidated Statements of Income and included in Other items, net, in the Consolidated Statements of Cash Flows. See Note 
13, Goodwill and other intangible assets, for the impact on the related IPR&D asset. The remaining contingent consideration 
liability  as  of  December  31,  2023,  primarily  relates  to  potential  development  and  regulatory  milestones  for  R&D  programs 
acquired via the Teneobio acquisition that we continue to pursue.

Summary of the fair values of other financial instruments

Cash equivalents

The  fair  values  of  cash  equivalents  approximate  their  carrying  values  due  to  the  short-term  nature  of  such  financial 

instruments.

Borrowings

We  estimated  the  fair  values  of  our  borrowings  by  using  Level  2  inputs.  As  of  December  31,  2023  and  2022,  the 
aggregate fair values of our borrowings were $59.2 billion and $35.0 billion, respectively, and the carrying values were $64.6 
billion and $38.9 billion, respectively.

During the years ended December 31, 2023 and 2022, there were no transfers of assets or liabilities between fair value 
measurement  levels,  and  except  with  respect  to  the  impairment  of  AMG  340  disclosed  in  Note  13,  Goodwill  and  other 

F-46

 
 
 
 
 
intangible assets, there were no material remeasurements to the fair values of assets and liabilities that are not measured at fair 
value on a recurring basis.

19. Derivative instruments

The Company is exposed to foreign currency exchange rate and interest rate risks related to its business operations. To 
reduce  our  risks  related  to  such  exposures,  we  use  or  have  used  certain  derivative  instruments,  including  foreign  currency 
forward,  foreign  currency  option,  cross-currency  swap,  forward  interest  rate  and  interest  rate  swap  contracts.  We  have 
designated certain of our derivatives as cash flow and fair value hedges; we also have derivatives not designated as hedges. We 
do not use derivatives for speculative trading purposes.

Cash flow hedges

We  are  exposed  to  possible  changes  in  the  values  of  certain  anticipated  foreign  currency  cash  flows  resulting  from 
changes  in  foreign  currency  exchange  rates  primarily  associated  with  our  euro-denominated  international  product  sales.  The 
foreign  currency  exchange  rate  fluctuation  exposure  associated  with  cash  inflows  from  our  international  product  sales  is 
partially offset by corresponding cash outflows from our international operating expenses. To further reduce this exposure, we 
enter into foreign currency forward contracts to hedge a portion of our projected international product sales up to a maximum of 
three years into the future; and at any given point in time, a higher percentage of nearer-term projected product sales is being 
hedged than in successive periods.

As of December 31, 2023, 2022 and 2021, we had outstanding foreign currency forward contracts with aggregate notional 
amounts  of  $6.6  billion,  $6.0  billion  and  $5.7  billion,  respectively.  We  have  designated  these  foreign  currency  forward 
contracts,  which  are  primarily  euro  based,  as  cash  flow  hedges.  Accordingly,  we  report  unrealized  gains  and  losses  on  these 
contracts in AOCI in the Consolidated Balance Sheets, and we reclassify them to Product sales in the Consolidated Statements 
of Income in the same periods during which the hedged transactions affect earnings.

To hedge our exposure to foreign currency exchange rate risk associated with certain of our long-term debt denominated 
in foreign currencies, we enter into cross-currency swap contracts. Under the terms of such contracts, we paid euros, pounds 
sterling and Swiss francs and received U.S. dollars for the notional amounts at inception of the contracts; and based on these 
notional  amounts,  we  exchange  interest  payments  at  fixed  rates  over  the  lives  of  the  contracts  by  paying  U.S.  dollars  and 
receiving euros, pounds sterling and Swiss francs. In addition, we will pay U.S. dollars to and receive euros, pounds sterling 
and Swiss francs from the counterparties at the maturities of the contracts for these same notional amounts. The terms of these 
contracts correspond to the related hedged debt, thereby effectively converting the interest payments and principal repayment 
on  the  debt  from  euros,  pounds  sterling  and  Swiss  francs  to  U.S.  dollars.  We  have  designated  these  cross-currency  swap 
contracts  as  cash  flow  hedges.  Accordingly,  the  unrealized  gains  and  losses  on  these  contracts  are  reported  in  AOCI  in  the 
Consolidated Balance Sheets and reclassified to Other income (expense), net, in the Consolidated Statements of Income in the 
same periods during which the hedged debt affects earnings.

 The notional amounts and interest rates of our cross-currency swaps as of December 31, 2023, were as follows (notional 

amounts in millions):

Hedged notes

2.00% 2026 euro Notes

5.50% 2026 pound sterling Notes

4.00% 2029 pound sterling Notes

Foreign currency

U.S. dollars

Notional amounts

Interest rates

Notional amounts

Interest rates

€ 

£ 

£ 

750 

475 

700 

 2.0 % $ 

 5.5 % $ 

 4.0 % $ 

833 

747 

1,111 

 3.9 %

 6.0 %

 4.6 %

During the first quarter of 2023, our 0.41% 2023 Swiss franc Bonds matured, and the related cross-currency swaps were 

settled.

In connection with the anticipated issuance of long-term fixed-rate debt, we occasionally enter into forward interest rate 
contracts in order to hedge the variability in cash flows due to changes in the applicable U.S. Treasury rate between the time we 
enter into these contracts and the time the related debt is issued. Gains and losses on forward interest rate contracts, which are 
designated  as  cash  flow  hedges,  are  recognized  in  AOCI  in  the  Consolidated  Balance  Sheets  and  are  amortized  into  Interest 
expense, net, in the Consolidated Statements of Income over the lives of the associated debt issuances. Amounts expected to be 
recognized during the subsequent 12 months on forward interest rate contracts are not material.

F-47

The unrealized gains and losses recognized in AOCI for our derivative instruments designated as cash flow hedges were 

as follows (in millions):

Derivatives in cash flow hedging relationships
Foreign currency forward contracts

Cross-currency swap contracts

Forward interest rate contracts

Total unrealized gains

Fair value hedges

Years ended December 31,

2023

2022

2021

$ 

$ 

(14)  $ 

308  $ 

73 

(31)   

28  $ 

(219)   

(5)   

84  $ 

373 

(214) 

— 

159 

To achieve a desired mix of fixed-rate and floating-rate debt, we entered into interest rate swap contracts that qualified for 
and were designated as fair value hedges. These interest rate swap contracts effectively convert fixed-rate coupons to floating-
rate  SOFR-based  coupons  over  the  terms  of  the  related  hedge  contracts.  As  of  both  December  31,  2023  and  2022,  we  had 
interest rate swap contracts with aggregate notional amounts of $6.7 billion that hedge certain portions of our long-term debt 
issuances. See Note 16, Financing arrangements, for information on our interest rate swaps.

For interest rate swap contracts that qualify for and are designated as fair value hedges, we recognize in Interest expense, 
net, in the Consolidated Statements of Income the unrealized gain or loss on the derivative resulting from the change in fair 
value during the period, as well as the offsetting unrealized loss or gain of the hedged item resulting from the change in fair 
value  during  the  period  attributable  to  the  hedged  risk.  If  a  hedging  relationship  involving  an  interest  rate  swap  contract  is 
terminated, the gain or loss realized on contract termination is recorded as an adjustment to the carrying value of the debt and 
amortized into Interest expense, net, over the remaining life of the previously hedged debt.

The hedged liabilities and related cumulative-basis adjustments for fair value hedges of those liabilities were recorded in 

the Consolidated Balance Sheets as follows (in millions):

Consolidated Balance Sheets locations

Current portion of long-term debt

Long-term debt

____________

Carrying amounts of hedged 
liabilities(1)

Cumulative amounts of fair value 
hedging adjustments related to the 
carrying amounts of the hedged 
liabilities(2)

December 31,

December 31,

2023

2022

2023

2022

$ 

$ 

1,441  $ 

4,788  $ 

82  $ 

6,017  $ 

41  $ 

(355)  $ 

82 

(519) 

(1) Current portion of long-term debt includes $69 million and $82 million of carrying value with discontinued hedging relationships as of December 31, 2023 
and 2022, respectively. Long-term debt includes $288 million and $357 million of carrying value with discontinued hedging relationships as of December 
31, 2023 and 2022, respectively.

(2) Current portion of long-term debt includes $69 million and $82 million of hedging adjustments on discontinued hedging relationships as of December 31, 
2023 and 2022, respectively. Long-term debt includes $188 million and $257 million of hedging adjustments on discontinued hedging relationships as of 
December 31, 2023 and 2022, respectively.

F-48

 
 
 
Impact of hedging transactions

The following tables summarize the amounts recorded in income and expense line items and the effects thereon from fair 

value and cash flow hedging, including discontinued hedging relationships (in millions):

Total amounts recorded in income and (expense) line items presented in the 
Consolidated Statements of Income

The effects of cash flow and fair value hedging:

Gains on cash flow hedging relationships reclassified out of AOCI:

Foreign currency forward contracts

Cross-currency swap contracts

(Losses) gains on fair value hedging relationships—interest rate swap agreements:
Hedged items(1)
Derivatives designated as hedging instruments

Year ended December 31, 2023

Product 
sales

Other 
income 
(expense), 
net

Interest 
expense, net

$  26,910  $ 

2,833  $ 

(2,875) 

$ 

$ 

$ 

$ 

180  $ 

—  $ 

—  $ 

42  $ 

— 

— 

—  $ 

—  $ 

—  $ 

—  $ 

(118) 

205 

Year ended December 31, 2022

Product 
sales

Other 
income 
(expense), 
net

Interest 
expense, net

Total amounts recorded in income and (expense) line items presented in the 
Consolidated Statements of Income

$  24,801  $ 

(814)  $ 

(1,406) 

The effects of cash flow and fair value hedging:

Gains (losses) on cash flow hedging relationships reclassified out of AOCI:

Foreign currency forward contracts

Cross-currency swap contracts

Gains (losses) on fair value hedging relationships—interest rate swap agreements:
Hedged items(1)
Derivatives designated as hedging instruments

Total amounts recorded in income and (expense) line items presented in the 
Consolidated Statements of Income

The effects of cash flow and fair value hedging:

Losses on cash flow hedging relationships reclassified out of AOCI:

Foreign currency forward contracts

Cross-currency swap contracts

Gains (losses) on fair value hedging relationships—interest rate swap agreements:
Hedged items(1)
Derivatives designated as hedging instruments

$ 

$ 

$ 

$ 

231  $ 

—  $ 

—  $ 

(233)  $ 

— 

— 

—  $ 

—  $ 

—  $ 

—  $ 

716 

(636) 

Year ended December 31, 2021

Product 
sales

Other 
income 
(expense), 
net

Interest 
expense, net

$  24,297  $ 

259  $ 

(1,197) 

$ 

$ 

$ 

$ 

(8)  $ 

—  $ 

—  $ 

(245)  $ 

— 

— 

—  $ 

—  $ 

—  $ 

—  $ 

281 

(192) 

__________

(1)  Gains on hedged items do not completely offset losses on the related designated hedging instruments due to amortization of the cumulative amounts of fair 
value  hedging  adjustments  included  in  the  carrying  amount  of  the  hedged  debt  for  discontinued  hedging  relationships  and  the  recognition  of  gains  on 
terminated hedges when the corresponding hedged item was paid down in the period. 

F-49

No portions of our cash flow hedge contracts were excluded from the assessment of hedge effectiveness. As of December 
31, 2023, we expected to reclassify $35 million of net gains on our foreign currency and cross-currency swap contracts out of 
AOCI and into earnings during the next 12 months.

Derivatives not designated as hedges

To reduce our exposure to foreign currency fluctuations in certain assets and liabilities denominated in foreign currencies, 
we enter into foreign currency forward contracts that are not designated as hedging transactions. Most of these exposures are 
hedged  on  a  month-to-month  basis.  As  of  December  31,  2023,  2022  and  2021,  the  total  notional  amounts  of  these  foreign 
currency  forward  contracts  were  $457  million,  $517  million  and  $680  million,  respectively.  Gains  and  losses  recognized  in 
earnings for our derivative instruments not designated as hedging instruments were not material for the years ended December 
31, 2023, 2022 and 2021.

Fair values of derivatives

The fair values of derivatives included in the Consolidated Balance Sheets were as follows (in millions):

December 31, 2023

Derivatives designated as hedging instruments:

Foreign currency forward contracts

Cross-currency swap contracts

Interest rate swap contracts

Forward interest rate contracts

Total derivatives designated as hedging 

instruments

Total derivatives

December 31, 2022

Derivatives designated as hedging instruments:

Foreign currency forward contracts

Cross-currency swap contracts

Interest rate swap contracts

Forward interest rate contracts

Total derivatives designated as hedging 

instruments

Total derivatives

Derivative assets

Derivative liabilities

Consolidated 
Balance Sheets locations

Fair values

Consolidated 
Balance Sheets locations

Fair values

Other current assets/ 
Other noncurrent 
assets

Other current assets/ 
Other noncurrent 
assets

Other current assets/ 
Other noncurrent 
assets

Other current assets/ 
Other noncurrent 
assets

Accrued liabilities/ 
Other noncurrent 
liabilities

Accrued liabilities/ 
Other noncurrent 
liabilities

Accrued liabilities/ 
Other noncurrent 
liabilities

Accrued liabilities/ 
Other noncurrent 
liabilities

$ 

145 

— 

— 

— 

145 

145 

$ 

$ 

116 

405 

571 

— 

1,092 

1,092 

$ 

Derivative assets

Derivative liabilities

Consolidated 
Balance Sheets locations

Fair values

Consolidated 
Balance Sheets locations

Fair values

Other current assets/ 
Other noncurrent 
assets

Other current assets/ 
Other noncurrent 
assets

Other current assets/ 
Other noncurrent 
assets

Other current assets/ 
Other noncurrent 
assets

Accrued liabilities/ 
Other noncurrent 
liabilities

Accrued liabilities/ 
Other noncurrent 
liabilities

Accrued liabilities/ 
Other noncurrent 
liabilities

Accrued liabilities/ 
Other noncurrent 
liabilities

$ 

287 

54 

— 

— 

341 

341 

$ 

$ 

76 

541 

776 

5 

1,398 

1,398 

$ 

For additional information, see Note 18, Fair value measurement.

F-50

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Our  derivative  contracts  that  were  in  liability  positions  as  of  December  31,  2023,  contain  certain  credit-risk-related 
contingent provisions that would be triggered if (i) we were to undergo a change-in-control and (ii) our or the surviving entity’s 
creditworthiness  deteriorates,  which  is  generally  defined  as  having  either  a  credit  rating  that  is  below  investment  grade  or  a 
materially weaker creditworthiness after the change-in-control. If these events were to occur, the counterparties would have the 
right, but not the obligation, to close the contracts under early-termination provisions. In such circumstances, the counterparties 
could request immediate settlement of these contracts for amounts that approximate the then current fair values of the contracts. 
In  addition,  our  derivative  contracts  are  not  subject  to  any  type  of  master  netting  arrangement,  and  amounts  due  either  to  or 
from a counterparty under the contracts may be offset against other amounts due either to or from the same counterparty only if 
an event of default or termination, as defined, were to occur.

The cash flow effects of our derivative contracts in the Consolidated Statements of Cash Flows are included in Net cash 
provided by operating activities, except for the settlement of notional amounts of cross-currency swaps, which are included in 
Net cash used in financing activities.

20. Contingencies and commitments 

Contingencies

In  the  ordinary  course  of  business,  we  are  involved  in  various  legal  proceedings,  government  investigations  and  other 
matters  that  are  complex  in  nature  and  have  outcomes  that  are  difficult  to  predict.  See  Part  I,  Item  1A.  Risk  Factors—Our 
business may be affected by litigation and government investigations. We describe our legal proceedings and other matters that 
are significant or that we believe could become significant in this footnote.

We record accruals for loss contingencies to the extent that we conclude it is probable that a liability has been incurred 
and  the  amount  of  the  related  loss  can  be  reasonably  estimated.  We  evaluate,  on  a  quarterly  basis,  developments  in  legal 
proceedings  and  other  matters  that  could  cause  an  increase  or  decrease  in  the  amount  of  the  liability  that  has  been  accrued 
previously.

Our legal proceedings involve various aspects of our business and a variety of claims, some of which present novel factual 
allegations and/or unique legal theories. In each of the matters described in this filing, in which we could incur a liability, our 
opponents seek an award of a not-yet-quantified amount of damages or an amount that is not material. In addition, a number of 
the matters pending against us are at very early stages of the legal process, which in complex proceedings of the sort we face 
often extend for several years. As a result, none of the matters described in this filing, in which we could incur a liability, have 
progressed sufficiently through discovery and/or the development of important factual information and legal issues to enable us 
to estimate a range of possible loss, if any, or such amounts are not material. While it is not possible to accurately predict or 
determine the eventual outcomes of these matters, an adverse determination in one or more of these matters currently pending 
could have a material adverse effect on our consolidated results of operations, financial position or cash flows.

Certain recent developments concerning our legal proceedings and other matters are discussed below.

Repatha Patent Litigation

Patent Disputes in the International Region

We  are  involved  in  and  expect  future  involvement  in  additional  disputes  regarding  our  PCSK9  patents  in  other 

jurisdictions and regions. This includes matters filed against us and that we have filed in Germany and Japan.

Germany

In  February  2016,  the  European  Patent  Office  (EPO)  granted  European  Patent  No.  2,215,124  (the  EP’124  Patent)  to 
Amgen.  This  patent  describes  and  claims  monoclonal  antibodies  to  PCSK9  and  methods  of  treatment  and  Sanofi  filed  an 
opposition to the patent in the EPO seeking to invalidate it. In November 2016, Sanofi-Aventis Deutschland GmbH, Sanofi-
Aventis  Groupe  S.A.  and  Sanofi  Winthrop  Industrie  S.A.  filed  a  joint  opposition  against  Amgen’s  patent,  and  each  of  Lilly, 
Regeneron Pharmaceuticals, Inc. (Regeneron) and Strawman Ltd. also filed oppositions to Amgen’s patent. In November 2018, 
the EPO confirmed the validity of Amgen’s EP’124 Patent, which was appealed to the Technical Board of Appeal (TBA). On 
October 29, 2020, the TBA upheld the validity of certain claims, including claims that protect Repatha, but ruled that broader 
claims encompassing PRALUENT were invalid. As a result of the TBA’s decision, national litigations regarding PRALUENT 
in Germany are in the process of being resolved.

In  Germany,  Sanofi-Aventis  Deutschland  GmbH  and  Regeneron  filed  actions  seeking  damages  arising  from  the 
provisional enforcement of an injunction against PRALUENT that was lifted after the TBA’s October 2020 ruling. Amgen filed 
counterclaims alleging that PRALUENT infringes Amgen’s European Patent No. 2,641,917 (the EP’917 Patent). On November 
29,  2023,  the  Regional  Court  of  Munich  ruled  that  PRALUENT  does  not  infringe  the  EP’917  Patent.  A  hearing  has  been 

F-51

scheduled  for  February  28,  2024  in  the  Munich  Regional  Court  on  Sanofi-Aventis  Deutschland  GmbH’s  and  Regeneron’s 
action for damages.

On July 21, 2022, Sanofi Biotechnology SAS filed an action against Amgen GmbH and Amgen (Europe) B.V. before the 
Regional  Court  of  Dusseldorf  alleging  that  the  marketing  and  sale  of  Repatha  infringes  European  Patent  No.  2,756,004  (the 
EP’004  Patent),  which  Sanofi  Biotechnology  SAS  licensed  from  Regeneron.  Sanofi  Biotechnology  SAS  is  seeking 
infringement damages and injunctive relief. The court scheduled a hearing on this infringement action for May 28, 2024.

On August 3, 2023, Amgen GmbH filed a Nullity Action before the German Federal Patent Court seeking invalidation of 
Regeneron’s  EP’004  Patent.  Regeneron  filed  a  Statement  of  Defense  on  November  20,  2023.  On  January  22,  2024,  Amgen 
filed its brief in reply.

Amgen and an anonymous third party opposed the EP’004 Patent in the EPO, but on December 6, 2023 the patent was 

finally upheld by the TBA as granted.

Unified Patent Court of the European Union

On June 1, 2023, Amgen filed an action before the Local Division of the Unified Patent Court in Munich against Sanofi-
Aventis Deutschland GmbH, Sanofi-Aventis Groupe S.A., Sanofi Winthrop Industrie S.A. (collectively, Sanofi-Aventis), and 
Regeneron  alleging  that  the  importation,  marketing,  sale  and  use  of  PRALUENT  infringes  European  Patent  3,666,797  (the 
EP’797 Patent) seeking an injunction and damages for past infringement. Regeneron filed counterclaims for revocation, but on 
February 5, 2024, the court transferred the counterclaims to the Central Division of the Unified Patent Court that is presiding 
over Sanofi’s revocation action. The Local Division scheduled the hearing on our EP’797 Patent infringement action to begin 
on October 16, 2024.

On June 29, 2023, the Central Division of the Unified Patent Court in Munich served Amgen with an action that was filed 
by  Sanofi-Aventis  that  seeks  revocation  of  the  EP’797  Patent.  The  Central  Division  scheduled  a  hearing  on  the  revocation 
action to begin on June 4, 2024.

On  January  10,  2024,  Sanofi  Biotechnologies  SAS  and  Regeneron  filed  an  action  against  Amgen  Inc.,  Amgen  Europe 
B.V.,  Amgen  N.V.,  Amgen  GmbH,  Amgen  B.V.,  Amgen  SAS,  and  Amgen  S.R.L  before  the  Unified  Patent  Court,  alleging 
infringement of EP 3,536,712, which Sanofi Biotechnology SAS licensed from Regeneron. Sanofi and Regeneron are seeking 
an injunction against the sale, marketing, use, importation, or storage of Repatha for certain specified uses in Belgium, France, 
Germany, Italy and the Netherlands.

Japan

On April 24, 2020, the Supreme Court of Japan declined to hear Sanofi K.K.’s appeals making final the Japanese High 
Court’s  decisions  that  PRALUENT  infringes  Amgen’s  valid  patent  rights  in  Japan.  On  June  24,  2020,  Amgen  filed  written 
answers to the invalidity trials initiated by Regeneron on February 12, 2020 before the Japan Patent Office seeking to invalidate 
Amgen’s Japanese patents that were previously held infringed by PRALUENT and valid over challenges filed by Sanofi K.K. 
On April 15, 2021, the Japanese Patent Office dismissed Regeneron’s invalidity trials, and in August 2021 Regeneron appealed 
the decisions to the Japanese High Court. On January 26, 2023, the Japanese High Court found Amgen’s patent claims invalid 
for lacking adequate support. On March 13, 2023, Amgen appealed to the Japanese Supreme Court the High Court’s decision 
that Amgen’s Japanese patent claims relating to PCSK9 were invalid for lacking adequate support. On September 15, 2023, the 
Japanese Supreme Court declined to hear Amgen’s appeal. The case will be remanded to the Japan Patent Office for further 
proceedings.

Damages proceedings against Sanofi K.K. are ongoing before the Tokyo District Court, where Sanofi K.K. has initiated 
new validity challenges to Amgen patents in Japan. On September 27, 2023, the Tokyo District Court found Amgen’s patent 
claims invalid and dismissed Amgen’s lawsuit for damages. Amgen appealed the District Court’s decision to the IP High Court 
on December 28, 2023.

Prolia/XGEVA Biologics Price Competition and Innovation Act (BPCIA) Litigation

Amgen Inc. et al. v. Sandoz Inc., et al. 

On May 1, 2023, Amgen Inc. and Amgen Manufacturing Limited filed a lawsuit in the U.S. District Court for the District 
of  New  Jersey  (New  Jersey  District  Court)  against  Sandoz  Inc.,  Sandoz  GmbH,  Lek  Pharmaceuticals  d.d.,  Novartis 
Pharmaceutical Productions d.o.o., and Novartis AG (collectively, Defendants) based on the submission to the FDA of a BLA 
seeking  approval  to  market  and  sell  a  biosimilar  version  of  Amgen’s  Prolia  and  XGEVA  products.  The  complaint  asserts 
infringement of the following 21 patents, which are listed in the FDA’s Purple Book for Amgen’s Prolia and XGEVA products: 
U.S.  Patent  Nos.  7,364,736;  7,928,205;  8,058,418;  9,012,178;  9,133,493;  9,228,168;  9,320,816;  9,328,134;  9,359,435; 

F-52

9,481,901;  10,167,492;  10,513,723;  10,583,397;  10,822,630;  10,894,972;  11,077,404;  11,098,079;  11,130,980;  11,254,963; 
11,299,760; and 11,434,514 (collectively, the Asserted Patents). Amgen seeks a judgment from the New Jersey District Court 
that Defendants have infringed or will infringe one or more claims of each of the Asserted Patents and based on that judgment, 
a  permanent  injunction  prohibiting  the  commercial  manufacture,  use,  offer  to  sell,  or  sale  within  the  United  States  or 
importation  into  the  United  States  of  Defendants’  proposed  denosumab  biosimilar  before  expiration  of  each  of  the  Asserted 
Patents found to infringe. Amgen also seeks monetary remedies for any past acts of infringement.

On June 16, 2023, Amgen filed an amended and supplemental complaint to include additional information regarding the 
completion of the BPCIA information exchange after the filing of the original complaint. Sandoz Inc. (Sandoz) responded to the 
amended and supplemental complaint on July 7, 2023, denying infringement and asserting counterclaims seeking a declaratory 
judgment  that  asserted  patents  are  invalid  and/or  unenforceable.  On  July  28,  2023,  Amgen  responded,  seeking  a  denial  and 
dismissal of Sandoz’s counterclaims.

On August 23, 2023, the New Jersey District Court entered a stipulation and order dismissing without prejudice Sandoz 
GmbH,  Lek  Pharmaceuticals  d.d.,  Novartis  Pharmaceutical  Productions  d.o.o.,  and  Novartis  AG  (collectively,  Foreign 
Defendants)  from  the  action.  Pursuant  to  the  stipulation  entered  by  the  New  Jersey  District  Court,  the  Foreign  Defendants 
agreed  to  be  bound  by  any  judgment  order  or  decision  in  the  matter  (including  appeals)  as  if  the  Foreign  Defendants  were 
named as defendants and parties to the judgment order or decision. Sandoz is now the sole named Defendant in the action.

On  October  30,  2023,  the  New  Jersey  District  Court  commenced  a  hearing  on  Amgen’s  motion  for  a  preliminary 
injunction to prohibit Sandoz from engaging in the commercial manufacture, use, offer for sell or sale within the United States, 
or importation into the United States of its proposed denosumab biosimilar until judgment is entered after trial on the merits. 
Closing arguments on Amgen’s motion for the preliminary injunction were held on December 21, 2023.

ABP 938 (aflibercept) Patent Litigation

On  January  10,  2024,  Regeneron  filed  a  lawsuit  in  the  U.S.  District  Court  for  the  Central  District  of  California  (the 
California  Central  District  Court)  against  Amgen  alleging  infringement  of  32  patents  listed  by  Regeneron  in  the  BPCIA 
exchange. The lawsuit stems from Amgen’s submission of an application under the BPCIA for FDA licensure of ABP 938 as 
biosimilar  to  Regeneron’s  EYLEA.  By  its  complaint,  Regeneron  seeks,  among  other  remedies,  an  injunction  prohibiting  the 
commercial manufacture, use, offer for sale or sale in the United States or import into the United States of ABP 938 before the 
expiration of each of the patents found to be infringed. On January 11, 2024, Regeneron filed a motion with the Judicial Panel 
on  Multidistrict  Litigation  to  transfer  this  case  from  the  California  Central  District  Court  to  the  U.S.  District  Court  for  the 
Northern District of West Virginia for coordinated pretrial proceedings with the five other cases involving EYLEA biosimilars 
pending in that district. A hearing on Regeneron’s motion to transfer has been scheduled for March 28, 2024. Amgen responded 
to  Regeneron’s  complaint  on  February  2,  2024,  denying  infringement  and  asserting  counterclaims  seeking  a  declaratory 
judgment that the asserted patents are not infringed, invalid, and/or unenforceable.

Antitrust Class Action

Sensipar Antitrust Class Actions

From  February  to  April  2019,  four  plaintiffs  filed  putative  class  action  lawsuits  against  Amgen  and  various  entities 
affiliated with Teva Pharmaceuticals USA, Inc. (Teva) alleging anticompetitive conduct in connection with settlements between 
Amgen and manufacturers of generic cinacalcet product. Two of those actions were brought in the U.S. District Court for the 
District of Delaware (the Delaware District Court), captioned UFCW Local 1500 Welfare Fund v. Amgen Inc., et al. (February 
21,  2019)  (Local  1500)  and  Cesar  Castillo,  Inc.  v.  Amgen  Inc.,  et  al.  (February  26,  2019)  (Castillo).  The  third  action  was 
brought in the New Jersey District Court, captioned Teamsters Local 237 Welfare Fund, et al. v. Amgen Inc., et al. (March 14, 
2019)  (Local  237)  and  the  fourth  action  was  brought  in  the  U.S.  District  Court  for  the  Eastern  District  of  Pennsylvania  (the 
Eastern Pennsylvania District Court), captioned KPH Healthcare Services, Inc. a/k/a Kinney Drugs, Inc. v. Amgen Inc., et al 
(April 10, 2019) (KPH). Each of the lawsuits is brought on behalf of a putative class of direct or indirect purchasers of Sensipar 
and  alleges  that  the  plaintiffs  have  overpaid  for  Sensipar  as  a  result  of  Amgen’s  conduct  that  allegedly  improperly  delayed 
market  entry  by  manufacturers  of  generic  cinacalcet  products.  The  lawsuits  focus  predominantly  on  the  settlement  among 
Amgen, Watson Laboratories, Inc. (Watson) and Teva of the parties’ patent infringement litigation. Each of the lawsuits seeks, 
among other things, treble damages, equitable relief and attorneys’ fees and costs. On April 10, 2019, the plaintiff in the KPH 
lawsuit filed a motion seeking to have the four lawsuits consolidated and designated as a multidistrict litigation (MDL) in the 
Eastern Pennsylvania District Court, and the plaintiff in the Local 1500 lawsuit filed a motion seeking to have the four lawsuits, 
along with Cipla Ltd. v. Amgen Inc., consolidated and designated as an MDL in the Delaware District Court. 

On  July  31,  2019,  the  MDL  panel  entered  an  order  consolidating  in  the  Delaware  District  Court  the  four  class  action 
lawsuits. On September 13, 2019, the plaintiffs filed amended complaints, and on October 15, 2019, Amgen filed its motion to 
dismiss both the direct purchaser plaintiffs’ consolidated class action complaint and the indirect purchaser end payer plaintiffs’ 

F-53

complaint.  On  December  6,  2019,  the  plaintiffs  responded  to  Amgen’s  motion  to  dismiss  and,  on  January  10,  2020,  Amgen 
filed its response. On February 6, 2020, the motions in the class action lawsuits were transferred to the U.S. Magistrate Judge 
for the District of Delaware (Magistrate Judge) for a recommendation. The MDL panel certified its conditional transfer order on 
February 6, 2020 transferring the additional class action lawsuit brought in the U.S. District Court for the Southern District of 
Florida, captioned MSP Recovery Claims v. Amgen Inc., et al., to the Delaware District Court.

On July 22, 2020, the Magistrate Judge issued a recommendation to the Delaware District Court that the claims against 
Amgen  be  dismissed  but  leave  be  given  to  plaintiffs  to  amend  their  complaints.  On  August  5,  2020,  the  plaintiffs  filed 
objections to the Magistrate Judge’s report and recommendation. On August 19, 2020, Amgen filed a response to the plaintiffs’ 
objections. On November 30, 2020, the Delaware District Court adopted the Magistrate Judge’s recommendation in part and 
denied it in part, denying Amgen’s motion to dismiss on the grounds that plaintiffs adequately alleged reverse payment claims 
but granted Amgen’s motion to dismiss with respect to the other Federal antitrust claims. On December 23, 2020, Teva, Watson 
and  Actavis  filed  a  motion  for  interlocutory  appeal  and  for  a  stay  pending  appeal  and  Amgen  filed  its  joinder  (the  1292 
Motion). On January 5, 2021, a joint status report was filed advising the Delaware District Court that the defendants are still 
considering whether to withdraw the 1292 Motion and plaintiffs’ offer to stay discovery, pending further rulings on motions to 
dismiss the amended complaints. On January 19, 2021, a joint status report was filed pursuant to the Delaware District Court’s 
January 6, 2021 order along with a stipulation to defer the 1292 Motion until after rulings on the amended complaints.

On February 16, 2021, the plaintiffs in the antitrust class action lawsuit brought on behalf of putative classes of direct or 
indirect purchasers of Sensipar filed their amended complaints. On March 4, 2021, a stipulation and order regarding the filing 
of a second amended complaint were filed to add another plaintiff: Teamsters Western Region & Local 177 Health Care Fund. 
On  March  17,  2021,  a  defendant,  MSP  Recovery  Claims,  Series  LLC,  filed  its  notice  of  voluntary  dismissal.  On  March  30, 
2021, the remaining defendants, including Amgen, filed their motions to dismiss the second amended complaint.

On  April  27,  2021,  plaintiffs  filed  their  oppositions  to  defendants’  (including  Amgen’s)  motion  to  dismiss,  and 
defendants’ reply was filed on May 25, 2021. A hearing on defendants’ motion to dismiss was held in the Delaware District 
Court on July 13, 2021.

On March 11, 2022, the Delaware District Court granted defendants’ (including Amgen’s) motion to dismiss except as to 
the reverse payment claim and various state law claims from ten of the states in which plaintiffs reside. On May 11, 2022, the 
parties filed motions asking permission to seek interlocutory appeal. The plaintiffs did not oppose Amgen’s motion and instead 
argued all issues should be appealed at this time. Amgen filed its opposition to plaintiffs’ motion on June 10, 2022, and reply 
briefs were filed on June 24, 2022.

On February 16, 2023, the Delaware District Court denied Amgen’s motion for interlocutory appeal. On March 2, 2023, 
Amgen  filed  a  motion  for  reargument,  which  the  Delaware  District  Court  denied  while  also  certifying  a  question  regarding 
whether the current judge has the authority to certify a question decided by a predecessor judge. On April 17, 2023, Amgen 
filed a petition with the U.S. Court of Appeals for the Third Circuit (the Third Circuit Court), seeking a grant of our request for 
interlocutory appeal of the certified question as well as the Delaware District Court’s denial of our motion to dismiss the reverse 
payment claim. Amgen’s response to the class action complaints is due 30 days after resolution or denial of the interlocutory 
appeal. 

  On  June  26,  2023,  the  Third  Circuit  Court  entered  an  order  granting  defendants’  (including  Amgen’s)  petition  for 
interlocutory appeal and denying plaintiffs’ cross-petition. The questions certified are whether (1) the statute for interlocutory 
decisions authorizes a district court judge to certify for interlocutory appeal an order issued in the same case by a predecessor 
district court judge; and (2) the settlement of a patent infringement claim that involves the forgiveness of damages associated 
with that patent’s alleged infringement, on its own or combined with an acceleration clause, constitutes a reverse payment. On 
July 3, 2023, Amgen and Teva Pharmaceuticals USA, Inc. filed a notice of appeal, and on October 17, 2023, Amgen submitted 
its initial brief in its appeal before the Third Circuit Court.

On January 12, 2024, Amgen reached an agreement in principle to settle with the putative class of indirect purchasers of 
Sensipar. The action with respect to the putative class of direct purchasers of Sensipar will proceed with the pending appeal 
before the Third Circuit Court.

Regeneron Pharmaceuticals, Inc. Antitrust Action

On May 27, 2022, Regeneron filed suit against Amgen in the Delaware District Court for federal and state antitrust and 
unfair  competition  violations  and  tortious  interference  with  prospective  business  relations.  Regeneron  alleges  that  Amgen’s 
sales contracting practices for Repatha, ENBREL and Otezla with key insurers, third-party payers and PBMs have harmed the 
sales of its product PRALUENT and focuses on two primary arguments: that Amgen improperly bundled sales of Repatha with 
ENBREL, Otezla and potentially other products and sought exclusive or de facto exclusive formulary positioning for Repatha. 
Amgen’s initial responsive pleading, a motion to dismiss, was filed on August 1, 2022.

F-54

On August 11, 2022, Amgen moved to stay the case pending the ultimate decision on the merits of the ongoing patent 
litigation between Amgen and Regeneron in Amgen Inc., et al. v. Sanofi, et al. On January 6, 2023, the Delaware District Court 
heard oral argument on the motion to stay and the motion to dismiss. On February 10, 2023, the Delaware District Court denied 
Amgen’s motion to stay this action, and on March 21, 2023, the Delaware District Court denied Amgen’s motion to dismiss the 
complaint.

On August 28, 2023, Regeneron filed its amended complaint, and on September 20, 2023, Amgen filed a counterclaim, 
alleging Regeneron’s own anticompetitive conduct with respect to formulary position for Regeneron’s drug, PRALUENT, at 
CVS. 

Trial is scheduled to begin on November 12, 2024.

U.S. Tax Litigation and Related Matters

Amgen Inc. & Subsidiaries v. Commissioner of Internal Revenue

See Note 7, Income taxes, for discussion of the IRS tax dispute and the Company’s petitions in the U.S. Tax Court.

Securities Class Action Litigation 

On March 13, 2023, Roofers Local No. 149 Pension Fund filed a purported class action against Amgen, Robert Bradway 
and Peter Griffith. The action was brought on behalf of an alleged class of Amgen shareholders who owned stock between July 
29, 2020 and April 27, 2022 (the alleged class period). Plaintiffs allege that the defendants made a series of materially false and 
misleading statements and omissions during the alleged class period regarding the failure to timely disclose the potential tax 
liability claimed by the IRS. Plaintiffs further allege that they and other purported class members suffered losses and damages 
resulting from declines in the market value of Amgen’s common stock after the potential tax liability claimed by the IRS was 
disclosed. 

On August 31, 2023, plaintiff filed an amended complaint and Amgen filed its motion to dismiss on November 6, 2023. 

Plaintiff’s response was filed on January 12, 2024 and Amgen’s reply is due February 26, 2024.

Shareholder Derivative Litigation (Martin)

On August 2, 2023, Leon Martin filed a derivative action (the Martin Derivative Action) captioned Leon Martin v. Robert 
A.  Bradway,  et  al.,  No.  1:23-cv-06754  (S.D.N.Y.  Aug.  2,  2023),  purportedly  on  behalf  of  Amgen,  against  Amgen,  Robert 
Bradway,  Peter  Griffith  and  Amgen’s  independent  Board  members.  The  action  was  filed  in  the  U.S.  District  Court  for  the 
Southern District of New York (Southern District Court of New York) as related to the pending federal securities class action 
filed by Roofers Local No. 149 Pension Fund on March 13, 2023 (the Roofers securities class action). The complaint in this 
matter alleges claims for violations of the Securities Exchange Act of 1934, breach of fiduciary duty, aiding and abetting breach 
of fiduciary duty, unjust enrichment and waste of corporate assets. The factual allegations that form the basis for these claims 
are  essentially  the  same  as  the  allegations  asserted  in  the  Roofers  securities  class  action  regarding  purportedly  false  and 
misleading  statements  and  omissions  made  from  July  29,  2020  through  April  27,  2022  relating  to  Amgen’s  tax  liabilities, 
business and finances, and the adequacy and maintenance of its internal controls.

On October 2, 2023, the Southern District Court of New York granted a stay of the matter pending an outcome on the 
motion  to  dismiss  in  the  federal  securities  class  action  filed  by  plaintiff.  On  December  7,  2023,  Plaintiff  filed  a  Notice  of 
Voluntary Dismissal as to Board member Michael Drake.

Shareholder Derivative Litigation (Clearwater)

On  December  1,  2023,  a  second  derivative  action  (the  Clearwater  Derivative  Action)  was  filed,  captioned  Cheri 
Clearwater  v.  Robert  A.  Bradway,  et  al.,  No.  1:23-cv-10538  (S.D.N.Y.  Dec.  1,  2023),  in  the  same  court  as  the  earlier-filed 
Martin Derivative Action. The second action is largely duplicative of the Martin Derivative Action, asserting the same claims 
purportedly  on  behalf  of  the  Company  against  the  individual  directors  that  sat  on  Amgen’s  Board  during  the  relevant  time 
period (July 29, 2020 through April 27, 2022). The complaint asserts claims for breach of fiduciary duty, unjust enrichment, 
waste of corporate assets, abuse of control, gross mismanagement, and violations of Section 10(b) of the Exchange Act arising 
out of Amgen’s disclosures with respect to its transfer pricing dispute with the IRS. However, the Clearwater Derivative Action 
complaint adds (1) two additional claims for violations of Sections 14(a) and 20(a) of the Exchange Act; (2) allegations that 
Amgen repurchased its own stock at artificially inflated prices during the relevant period; and (3) more detailed allegations as to 
why first making a demand on the Board would have been futile.

F-55

On January 16, 2024, the Southern District Court of New York consolidated the Martin Derivative Action and Clearwater 
Derivative Action (the Consolidated Action). The stay entered in the Martin Derivative Action also applies to the Consolidated 
Action. 

ChemoCentryx, Inc. Securities Matters

On May 5 and June 8 of 2021, ChemoCentryx and its Chief Executive Officer were named as defendants in two putative 
shareholder  class  actions  filed  in  the  U.S.  District  Court  for  the  Northern  District  of  California  (Northern  District  Court  of 
California).  These  cases  were  consolidated  into  Homyk  v.  ChemoCentryx,  Inc.  in  which  the  plaintiffs  allege  violations  of 
Sections 10(b) and 20(a) of the Securities Exchange Act in connection with statements regarding the New Drug Application for 
TAVNEOS and the underlying Phase 3 clinical trial, seeking an award of damages, interest and attorneys’ fees. On March 28, 
2022, the plaintiffs filed their consolidated amended complaint, and on May 19, 2022, ChemoCentryx moved to dismiss these 
claims.

On February 23, 2023, the Northern District Court of California substantially denied ChemoCentryx’s motion to dismiss 
the matter in its entirety, while granting the motion to dismiss with respect to certain allegations of the plaintiffs. On April 4, 
2023, the parties submitted a case management statement to the Northern District Court of California, and on April 10, 2023, 
the  Northern  District  Court  of  California  entered  an  order  setting  dates  for  amendment  of  pleadings  and  briefing  on  class 
certification. On April 27, 2023, ChemoCentryx submitted its answer to the complaint.

On  August  25,  2023,  the  lead  plaintiff  moved  to  certify  a  class  composed  of  all  purchasers  of  ChemoCentryx  stock 

between November 25, 2019 and May 6, 2021. ChemoCentryx filed its opposition on November 22, 2023. 

Lead plaintiff filed its reply brief in support of class certification on January 23, 2024. A hearing on class certification is 

set for February 15, 2024.

Commitments – U.S. repatriation tax

Under  the  2017  Tax  Act,  we  elected  to  pay  in  eight  annual  installments  the  repatriation  tax  related  primarily  to  prior 
indefinitely invested earnings of our foreign operations. The following table summarizes the remaining scheduled repatriation 
tax payments as of December 31, 2023 (in millions):

2024

2025

Total remaining U.S. repatriation tax commitments

Amounts

$ 

$ 

1,467 

1,834 

3,301 

F-56

 
AMGEN INC.

VALUATION AND QUALIFYING ACCOUNTS

Years ended December 31, 2023, 2022 and 2021 

SCHEDULE II

(In millions)

Balance
at beginning
of period

Additions
charged to
costs and
expenses

Other
additions

Deductions

Balance
at end
of period

$ 

$ 

$ 

22  $ 

26  $ 

32  $ 

6  $ 

—  $ 

—  $ 

—  $ 

—  $ 

—  $ 

—  $ 

(4)  $ 

(6)  $ 

28 

22 

26 

Allowance for doubtful accounts
Year ended December 31, 2023

Year ended December 31, 2022

Year ended December 31, 2021

F-57