Quarterlytics / Healthcare / Drug Manufacturers - General / Merck & Co

Merck & Co

mrk · NYSE Healthcare
Claim this profile
Ticker mrk
Exchange NYSE
Sector Healthcare
Industry Drug Manufacturers - General
Employees 10,000+
← All annual reports
FY2020 Annual Report · Merck & Co
Sign in to download
Loading PDF…
As filed with the Securities and Exchange Commission on February 25, 2021

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, 2020

☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from                  to                 

OR

Commission File No. 1-6571

_________________________________

Merck & Co., Inc.
2000 Galloping Hill Road

Kenilworth

New Jersey

07033

(908) 740-4000

New Jersey

(State or other jurisdiction of incorporation)

22-1918501

(I.R.S Employer Identification No.)

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

Title of Each Class
Common Stock ($0.50 par value)
1.125% Notes due 2021
0.500% Notes due 2024
1.875% Notes due 2026
2.500% Notes due 2034
1.375% Notes due 2036

Trading Symbol(s)
MRK
MRK/21
MRK 24
MRK/26
MRK/34
MRK 36A

Name of Each Exchange on which Registered
New York Stock Exchange
New York Stock Exchange
New York Stock Exchange
New York Stock Exchange
New York Stock Exchange
New York Stock Exchange

Number of shares of Common Stock ($0.50 par value) outstanding as of January 31, 2021: 2,530,315,668.

Aggregate market value of Common Stock ($0.50 par value) held by non-affiliates on June 30, 2020 based on closing price on June 30, 2020: $195,461,000,000.
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.     Yes ☒    No ☐
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes ☐    No ☒

Indicate  by  check  mark  whether  the  registrant  (1)  has  filed  all  reports  required  to  be  filed  by  Section  13  or  15(d)  of  the  Securities  Exchange  Act  of  1934  during  the  preceding

12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒ No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 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  ☒ 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. (Check One):

Large accelerated filer
Non-accelerated filer

☒
☐

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

Document
Proxy Statement for the Annual Meeting of Shareholders to be held May 25, 2021, to be filed with the 
Securities and Exchange Commission within 120 days after the close of the fiscal year covered by this report

Documents Incorporated by Reference:

Part of Form 10-K
Part III

 
 
 
Table of Contents

Table of Contents

Part I

Business
Risk Factors
Cautionary Factors that May Affect Future Results
Unresolved Staff Comments
Properties
Legal Proceedings
Mine Safety Disclosures
Executive Officers of the Registrant

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data

Part II

(a) Financial Statements

Notes to Consolidated Financial Statements
Report of Independent Registered Public Accounting Firm

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Controls and Procedures
Management’s Report
Other Information

Part III

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

Part IV

Item 1.
Item 1A.

Item 1B.
Item 2.
Item 3.
Item 4.

Item 5.
Item 7.
Item 7A.
Item 8.

Item 9.
Item 9A.

Item 9B.

Item 10.
Item 11.
Item 12.

Item 13.
Item 14.

Item 15.

Exhibits and Financial Statement Schedules

Item 16.

Form 10-K Summary
Signatures

Page

1
26
41
42
42
43
43
44

45
47
78
79
79
83
136
138
138
138
139

140
140

141
141
141

142

146
147

 
 
 
Table of Contents

Item 1.

Business.

PART I

Merck & Co., Inc. (Merck or the Company) is a global health care company that delivers innovative health solutions through its prescription medicines,
vaccines,  biologic  therapies  and  animal  health  products.  The  Company’s  operations  are  principally  managed  on  a  products  basis  and  include  two  operating
segments, which are the Pharmaceutical and Animal Health segments, both of which are reportable segments.

The Pharmaceutical segment includes human health pharmaceutical and vaccine products. Human health pharmaceutical products consist of therapeutic
and  preventive  agents,  generally  sold  by  prescription,  for  the  treatment  of  human  disorders.  The  Company  sells  these  human  health  pharmaceutical  products
primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy
benefit managers and other institutions. Human health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at
physician offices. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities.

The Animal Health segment discovers, develops, manufactures and markets a wide range of veterinary pharmaceutical and vaccine products, as well as
health management solutions and services, for the prevention, treatment and control of disease in all major livestock and companion animal species. The Company
also  offers  an  extensive  suite  of  digitally  connected  identification,  traceability  and  monitoring  products.  The  Company  sells  its  products  to  veterinarians,
distributors and animal producers.

The Company previously had a Healthcare Services segment that provided services and solutions focused on engagement, health analytics and clinical

services to improve the value of care delivered to patients. The Company divested the remaining businesses in this segment in the first quarter of 2020.

The Company previously had an Alliances segment that primarily included activity from the Company’s relationship with AstraZeneca LP related to

sales of Nexium and Prilosec, which concluded in 2018.

All product or service marks appearing in type form different from that of the surrounding text are trademarks or service marks owned, licensed to,

promoted or distributed by Merck, its subsidiaries or affiliates, except as noted. All other trademarks or services marks are those of their respective owners.

Planned Spin-Off of Women’s Health, Biosimilars and Established Brands into a New Company    

In  February  2020,  Merck  announced  its  intention  to  spin-off  (the  Spin-Off)  products  from  its  women’s  health,  biosimilars  and  established  brands
businesses  into  a  new,  independent,  publicly  traded  company  named  Organon  &  Co.  (Organon)  through  a  distribution  of  Organon’s  publicly  traded  stock  to
Company  shareholders.  The  distribution  is  expected  to  qualify  as  tax-free  to  the  Company  and  its  shareholders  for  U.S.  federal  income  tax  purposes.  The
established brands included in the transaction consist of dermatology, non-opioid pain management, respiratory, and select cardiovascular products including Zetia
(ezetimibe)  and  Vytorin (ezetimibe/simvastatin),  as  well  as  the  rest  of  Merck’s  diversified  brands  franchise.  Merck’s  existing  research  pipeline  programs  will
continue to be owned and developed within Merck as planned. Organon will have development capabilities initially focused on late-stage development and life-
cycle management, and is expected over time to develop research capabilities in selected therapeutic areas. The Spin-Off is expected to be completed late in the
second quarter of 2021, subject to market and certain other conditions. See “Risk Factors - Risks Related to the Proposed Spin-Off of Organon.”

1

 
Table of Contents

Product Sales

Total Company sales, including sales of the Company’s top pharmaceutical products, as well as sales of animal health products, were as follows:

($ in millions)
Total Sales
Pharmaceutical
Keytruda
Januvia/Janumet
Gardasil/Gardasil 9
ProQuad/M-M-R II/Varivax
Bridion
Pneumovax 23
Isentress/Isentress HD
Simponi
RotaTeq
Alliance revenue - Lynparza
Implanon/Nexplanon
Zetia/Vytorin
Alliance revenue - Lenvima

(1)

(1)

Animal Health
Livestock
Companion Animals
(2)

Other Revenues

$

2020

2019

2018

$

47,994 
43,021 
14,380 
5,276 
3,938 
1,878 
1,198 
1,087 
857 
838 
797 
725 
680 
664 
580 
4,703 
2,939 
1,764 
270 

$

46,840 
41,751 
11,084 
5,524 
3,737 
2,275 
1,131 
926 
975 
830 
791 
444 
787 
874 
404 
4,393 
2,784 
1,609 
696 

42,294 
37,689 
7,171 
5,914 
3,151 
1,798 
917 
907 
1,140 
893 
728 
187 
703 
1,355 
149 
4,212 
2,630 
1,582 
393 

(1)

 Alliance revenue represents Merck’s share of profits, which are product sales net of cost of sales and commercialization costs.

(2)

Other revenues are primarily comprised of third-party manufacturing sales and miscellaneous corporate revenues, including revenue hedging activities.

Pharmaceutical

The Pharmaceutical segment includes human health pharmaceutical and vaccine products. Human health pharmaceutical products consist of therapeutic
and  preventive  agents,  generally  sold  by  prescription,  for  the  treatment  of  human  disorders.  Human  health  vaccine  products  consist  of  preventive  pediatric,
adolescent and adult vaccines, primarily administered at physician offices. Certain of the products within the Company’s franchises are as follows:

Oncology

Keytruda (pembrolizumab), the Company’s anti-PD-1 (programmed death receptor-1) therapy, as monotherapy for the treatment of certain patients with
cervical  cancer,  classical  Hodgkin  Lymphoma  (cHL),  cutaneous  squamous  cell  carcinoma  (cSCC),  esophageal  cancer,  gastric  or  gastroesophageal  junction
adenocarcinoma, head and neck squamous cell carcinoma (HNSCC), hepatocellular carcinoma (HCC), non-small-cell lung cancer (NSCLC), small-cell lung cancer
(SCLC),  melanoma,  Merkel  cell  carcinoma,  microsatellite  instability-high  (MSI-H)  or  mismatch  repair  deficient  (dMMR)  cancer,  including  MSI-H/dMMR
colorectal cancer, primary mediastinal large B-cell lymphoma (PMBCL), tumor mutational burden-high (TMB-H) cancer, and urothelial carcinoma, including non-
muscle invasive bladder cancer. Keytruda is also approved for the treatment of certain patients in combination with chemotherapy for metastatic squamous and
non-squamous NSCLC, in combination with chemotherapy for HNSCC, in combination with chemotherapy for triple-negative breast cancer, in combination with
axitinib  for  renal  cell  carcinoma,  and  in  combination  with  lenvatinib  for  endometrial  carcinoma;  and  Emend (aprepitant)  for  the  prevention  of  certain
chemotherapy-induced  nausea  and  vomiting.  In  addition,  the  Company  recognizes  alliance  revenue  related  to  sales  of  Lynparza  (olaparib),  an  oral  poly  (ADP-
ribose) polymerase (PARP) inhibitor, for certain types of advanced ovarian, breast, pancreatic, and prostate cancers; and Lenvima (lenvatinib) for certain types of
thyroid  cancer,  hepatocellular  carcinoma,  in  combination  with  everolimus  for  certain  patients  with  renal  cell  carcinoma,  and  in  combination  with  Keytruda for
certain patients with endometrial carcinoma.

Vaccines

Gardasil (Human Papillomavirus Quadrivalent [Types 6, 11, 16 and 18] Vaccine, Recombinant)/Gardasil 9 (Human Papillomavirus 9-valent Vaccine,

Recombinant), vaccines to help prevent certain diseases

2

Table of Contents

caused by certain types of human papillomavirus (HPV); ProQuad (Measles, Mumps, Rubella and Varicella Virus Vaccine Live), a pediatric combination vaccine
to help protect against measles, mumps, rubella and varicella; M−M−R II (Measles, Mumps and Rubella Virus Vaccine Live), a vaccine to help prevent measles,
mumps and rubella; Varivax (Varicella Virus Vaccine Live), a vaccine to help prevent chickenpox (varicella); Pneumovax 23 (pneumococcal vaccine polyvalent), a
vaccine to help prevent pneumococcal disease; RotaTeq (Rotavirus Vaccine, Live Oral, Pentavalent), a vaccine to help protect against rotavirus gastroenteritis in
infants and children; and Vaqta (hepatitis A vaccine, inactivated) indicated for the prevention of disease caused by hepatitis A virus in persons 12 months of age
and older.

Hospital Acute Care

Bridion (sugammadex)  Injection,  a  medication  for  the  reversal  of  two  types  of  neuromuscular  blocking  agents  used  during  surgery;  Noxafil
(posaconazole), an antifungal agent for the prevention of certain invasive fungal infections; Prevymis (letermovir) for the prophylaxis of cytomegalovirus (CMV)
reactivation  and  disease  in  adult  CMV-seropositive  recipients  [R+]  of  an  allogeneic  hematopoietic  stem  cell  transplant;  Primaxin (imipenem  and cilastatin)  for
injection, an antibiotic for the treatment of certain bacterial infections; Cancidas (caspofungin acetate) for injection, an anti-fungal agent for the treatment of certain
fungal infections; Invanz (ertapenem) for injection, an antibiotic for the treatment of certain bacterial infections;  Cubicin (daptomycin for injection), an antibiotic
for the treatment of certain bacterial infections; and Zerbaxa (ceftolozane and tazobactam) for injection, a combination antibacterial and beta-lactamase inhibitor
for the treatment of certain bacterial infections.

Immunology

Simponi (golimumab),  a  once-monthly  subcutaneous  treatment  for  certain  inflammatory  diseases;  and  Remicade (infliximab),  a  treatment  for

inflammatory diseases, both of which the Company markets in Europe, Russia and Turkey.

Neuroscience

Belsomra (suvorexant), an orexin receptor antagonist indicated for the treatment of insomnia, characterized by difficulties with sleep onset and/or sleep

maintenance.

Virology

Isentress/Isentress  HD (raltegravir),  an  HIV  integrase  inhibitor  for  use  in  combination  with  other  antiretroviral  agents  for  the  treatment  of  HIV-1
infection; and Zepatier (elbasvir and grazoprevir) for the treatment of adult patients with chronic hepatitis C virus (HCV) genotype (GT) 1 or GT4 infection, with
ribavirin in certain patient populations.

Cardiovascular

Zetia (ezetimibe)  (marketed  as  Ezetrol in  most  countries  outside  the  United  States);  Vytorin (ezetimibe/simvastatin)  (marketed  as  Inegy outside  the
United  States);  Atozet (ezetimibe  and  atorvastatin)  (marketed  outside  of  the  United  States)  and  Rosuzet (ezetimibe  and  rosuvastatin)  (marketed  outside  of  the
United States), cholesterol modifying medicines; and Adempas (riociguat), a cardiovascular drug for the treatment of pulmonary arterial hypertension.

Diabetes

Januvia (sitagliptin) and Janumet (sitagliptin/metformin HCl) for the treatment of type 2 diabetes.

Women’s Health

Implanon (etonogestrel  implant),  a  single-rod  subdermal  contraceptive  implant/ Nexplanon (etonogestrel  implant),  a  single,  radiopaque,  rod-shaped

subdermal contraceptive implant; and NuvaRing (etonogestrel/ethinyl estradiol vaginal ring), a vaginal contraceptive product.

Animal Health

The  Animal  Health  segment  discovers,  develops,  manufactures  and  markets  a  wide  range  of  veterinary  pharmaceuticals,  vaccines  and  health
management solutions and services, as well as an extensive suite of digitally connected identification, traceability and monitoring products. Principal products in
this segment include:

Livestock Products

Nuflor (Florfenicol)  antibiotic  range  for  use  in  cattle  and  swine;  Bovilis/Vista vaccine  lines  for  infectious  diseases  in  cattle;  Banamine (Flunixin
meglumine) bovine and swine anti-inflammatory; Estrumate (cloprostenol  sodium)  for  the  treatment  of  fertility  disorders  in  cattle;  Matrix (altrenogest) fertility
management for swine; Resflor (florfenicol and flunixin meglumine), a combination broad-spectrum antibiotic and non-steroidal anti-inflammatory

3

Table of Contents

drug for bovine respiratory disease; Zuprevo (Tildipirosin) for bovine respiratory disease;  Zilmax (zilpaterol hydrochloride) and  Revalor (trenbolone acetate and
estradiol)  to  improve  production  efficiencies  in  beef  cattle;  Safe-Guard (fenbendazole)  de-wormer  for  cattle;  M+Pac (Mycoplasma  Hyopneumoniae  Bacterin)
swine  pneumonia  vaccine;  Porcilis (Lawsonia intracellularis  baterin) and  Circumvent (Porcine  Circovirus  Vaccine,  Type  2,  Killed  Baculovirus  Vector)  vaccine
lines  for  infectious  diseases  in  swine;  Nobilis/Innovax (Live  Marek’s  Disease  Vector) , vaccine  lines  for  poultry;  Paracox and  Coccivac coccidiosis  vaccines;
Exzolt,  a  systemic  treatment  for  poultry  red  mite  infestations;  Slice (Emamectin  benzoate)  parasiticide  for  sea  lice  in  salmon;  Aquavac (Avirulent  Live
Culture)/Norvax vaccines against bacterial and viral disease in fish;  Compact PD vaccine for salmon;  Aquaflor (Florfenicol) antibiotic for farm-raised fish; and
Allflex Livestock Intelligence solutions for animal identification, monitoring and traceability.

Companion Animal Products

Bravecto, a line of oral and topical parasitic control products, including the original Bravecto (fluralaner) products for dogs and cats that last up to 12
weeks; Bravecto (fluralaner) One-Month, a monthly product for dogs, and Bravecto Plus (fluralaner/moxidectin), a two-month product for cats; Sentinel, a line of
oral  parasitic  products  for  dogs  including  Sentinel  Spectrum (milbemycin  oxime,  lufenuron,  and  praziquantel)  and  Sentinel  Flavor  Tabs (milbemycin  oxime,
lufenuron); Optimmune (cyclosporine),  an  ophthalmic  ointment; Nobivac vaccine  lines  for  flexible  dog  and  cat  vaccination;  Otomax (Gentamicin  sulfate,  USP;
Betamethasone valerate USP; and Clotrimazole USP ointment)/Mometamax (Gentamicin sulfate, USP, Mometasone Furoate Monohydrate and Clotrimazole, USP,
Otic  Suspension)/Posatex (Orbifloxacin,  Mometasone  Furoate  Monohydrate  and  Posaconazole,  Suspension)  ear  ointments  for  acute  and  chronic  otitis;
Caninsulin/Vetsulin (porcine  insulin  zinc  suspension)  diabetes  mellitus  treatment  for  dogs  and  cats;  Panacur (fenbendazole)/ Safeguard (fenbendazole)  broad-
spectrum anthelmintic (de-wormer) for use in many animals; Regumate (altrenogest) fertility management for horses;  Prestige vaccine line for horses;  Scalibor
(Deltamethrin)/Exspot for protecting against bites from fleas, ticks, mosquitoes and sandflies; and  Sure Petcare products for companion animal identification and
well-being, including the microchip and pet recovery system Home Again.

For a further discussion of sales of the Company’s products, see Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of

Operations” below.

2020 Product Approvals

Set forth below is a summary of significant product approvals received by the Company in 2020.

Product

Dificid

 (1)

Date

January 2020

Gardasil

November 2020

Gardasil 9

December 2020

July 2020

June 2020

Approval

U.S. Food and Drug Administration (FDA) approved Dificid as an oral suspension, and Dificid tablets
for the treatment of Clostridioides (formerly Clostridium) difficile-associated diarrhea in children aged
six months and older.
China’s National Medical Products Administration (NMPA) granted expanded approval for Gardasil
for use in girls and women from 9 to 45 years of age.
Japan’s Ministry of Health, Labour and Welfare (MHLW) approved additional indication, dosage and
administrations of Gardasil 9 (marketed as Silgard 9) for the prevention of anal cancer (squamous cell
cancer) and precursor lesions (anal intraepithelial neoplasia (AIN) grade 1/2/3) caused by HPV types 6,
11, 16 and 18 for individuals 9 years and older and for Genital Warts (condyloma acuminate) for men 9
years and older.

Japan’s Pharmaceuticals and Medical Devices Agency (PMDA) approved Gardasil 9 for use in girls
and women 9 years and older for the prevention of cervical cancer, certain cervical, vaginal and vulvar
precancers, and genital warts caused by the HPV types covered by the vaccine.

FDA granted accelerated approval for an expanded indication for Gardasil 9 for the prevention of
oropharyngeal and other head and neck cancers caused by HPV Types 16, 18, 31, 33, 45, 52, and 58.

4

Table of Contents

Keytruda

December 2020

NMPA approved Keytruda as monotherapy for the first-line treatment of patients with metastatic or
with unresectable, recurrent HNSCC whose tumors express PD-L1 (Combined Positive Score CPS
≥20) as determined by a fully validated test.

November 2020 

FDA granted accelerated approval for Keytruda in combination with chemotherapy for patients with
locally recurrent unresectable or metastatic triple‑negative breast cancer whose tumors express PD-L1
(CPS ≥10).

October 2020

FDA approved an expanded label for Keytruda, as monotherapy for the treatment of adult patients with
relapsed or refractory cHL.

August 2020 

August 2020 

June 2020 

June 2020 

June 2020 

June 2020 

April 2020 

PMDA approved Keytruda for use at an additional recommended dosage of 400 mg every six weeks
(Q6W) administered as an intravenous infusion over 30 minutes across all adult indications, including
Keytruda monotherapy and combination therapy.

PMDA approved Keytruda for the treatment of patients whose tumors are PD-L1-positive, and have
radically unresectable, advanced or recurrent esophageal squamous cell carcinoma (ESCC) who have
progressed after chemotherapy.

FDA approved Keytruda as monotherapy for the first-line treatment of patients with unresectable or
metastatic MSI-H or dMMR colorectal cancer.

FDA approved Keytruda as monotherapy for the treatment of patients with recurrent or metastatic
cSCC that is not curable by surgery or radiation.

NMPA approved Keytruda as monotherapy for the treatment of patients with locally advanced or
metastatic ESCC whose tumors express PD-L1 (CPS ≥10) as determined by a fully validated test,
following failure of one prior line of systemic therapy.

FDA granted accelerated approval for Keytruda as monotherapy for the treatment of adult and
pediatric patients with unresectable or metastatic TMB-H [≥10 mutations/megabase (mut/Mb)] solid
tumors, as determined by an FDA-approved test, that have progressed following prior treatment and
who have no satisfactory alternative treatment options.

FDA granted accelerated approval for Keytruda for use at an additional recommended dose of 400 mg
every six weeks (Q6W) for all approved adult indications.

January 2020

FDA approved Keytruda for patients with Bacillus Calmette-Guerin (BCG)-unresponsive, high-risk,
non-muscle invasive bladder cancer with carcinoma in situ with or without papillary tumors who are
ineligible for or have elected not to undergo cystectomy.

Koselugo

(2)

April 2020

Lenvima

November 2020

FDA approved the kinase inhibitor Koselugo for the treatment of pediatric patients two years of age
and older with neurofibromatosis type 1 (NF1) who have symptomatic, inoperable plexiform
neurofibromas (PN).
NMPA approved Lenvima as a monotherapy for the treatment of differentiated thyroid cancer.

5

Table of Contents

December 2020

PMDA approved Lynparza for the treatment of patients with BRCA gene-mutated (BRCAm)
castration-resistant prostate cancer with distant metastasis.

December 2020

PMDA approved Lynparza as maintenance treatment after platinum-based chemotherapy for patients
with BRCAm curatively unresectable pancreas cancer.

December 2020

PMDA approved Lynparza as maintenance treatment after first-line chemotherapy containing
bevacizumab (genetical recombination) in patients with homologous recombination repair deficient
(HRD) ovarian cancer.

November 2020

The European Commission (EC) approved Lynparza for the maintenance treatment of adult patients
with advanced (FIGO stages III and IV) high-grade epithelial ovarian, fallopian tube or primary
peritoneal cancer who are in response (complete or partial) following completion of first-line
platinum-based chemotherapy in combination with bevacizumab and whose cancer is associated with
HRD-positive status defined by either a breast cancer susceptibility gene 1/2 (BRCA1/2) mutation
and/or genomic instability.

Lynparza

(2)

November 2020

EC approved Lynparza as monotherapy for the treatment of adult patients with metastatic castration-
resistant prostate cancer (mCRPC) and BRCA1/2 mutations (germline and/or somatic) who have
progressed following a prior therapy that included a new hormonal agent.

July 2020 

May 2020

May 2020 

EC approved Lynparza as a monotherapy for the maintenance treatment of adult patients with
germline BRCA1/2 mutations who have metastatic adenocarcinoma of the pancreas and have not
progressed after a minimum of 16 weeks of platinum treatment within a first-line chemotherapy
regimen.

FDA approved Lynparza for the treatment of adult patients with deleterious or suspected deleterious
germline or somatic homologous recombination repair (HRR) gene-mutated mCRPC, as determined
by an FDA-approved test, who have progressed following prior treatment with enzalutamide or
abiraterone.

FDA approved Lynparza in combination with bevacizumab as a first-line maintenance treatment of
adult patients with advanced epithelial ovarian, fallopian tube or primary peritoneal cancer who are in
complete or partial response to first-line platinum-based chemotherapy and whose cancer is
associated with HRD positive status defined by either a deleterious or suspected deleterious BRCA
mutation, and/or genomic instability, as determined by an FDA-approved test.

Recarbrio 

Steglatro

(3)

June 2020 

July 2020

FDA approved Recarbrio for the treatment of patients 18 years of age and older with hospital-
acquired bacterial pneumonia and ventilator-associated bacterial pneumonia (HABP/VABP).
NMPA approved Steglatro 5 mg tablets for the treatment of type 2 diabetes.

(1) 

Dificid in the U.S. and Canada is a trademark of Cubist Pharmaceuticals LLC, an indirect wholly-owned subsidiary of Merck Sharp & Dohme Corp.

(2) 

In July 2017, Merck and AstraZeneca entered into a global strategic oncology collaboration to co-develop and co-commercialize AstraZeneca’s Lynparza and Koselugo.

(3) 

Being commercialized and promoted in a worldwide, except Japan, collaboration with Pfizer Inc.

6

Table of Contents

Competition and the Health Care Environment

Competition

The markets in which the Company conducts its business and the pharmaceutical industry in general are highly competitive and highly regulated. The
Company’s  competitors  include  other  worldwide  research-based  pharmaceutical  companies,  smaller  research  companies  with  more  limited  therapeutic  focus,
generic drug manufacturers, and animal health care companies. The Company’s operations may be adversely affected by generic and biosimilar competition as the
Company’s  products  mature,  as  well  as  technological  advances  of  competitors,  industry  consolidation,  patents  granted  to  competitors,  competitive  combination
products, new products of competitors, the generic availability of competitors’ branded products, and new information from clinical trials of marketed products or
post-marketing surveillance. In addition, patent rights are increasingly being challenged by competitors, and the outcome can be highly uncertain. An adverse result
in a patent dispute can preclude commercialization of products or negatively affect sales of existing products and could result in the payment of royalties or in the
recognition of an impairment charge with respect to intangible assets associated with certain products.

Pharmaceutical competition involves a rigorous search for technological innovations and the ability to market these innovations effectively. With its
long-standing  emphasis on research  and development,  the Company is well-positioned  to compete  in the search for technological  innovations. The Company is
active  in  acquiring  and  marketing  products  through  external  alliances,  such  as  licensing  arrangements  and  collaborations  and  has  been  refining  its  sales  and
marketing efforts to address changing industry conditions. However, the introduction of new products and processes by competitors may result in price reductions
and product displacements, even for products protected by patents. For example, the number of compounds available to treat a particular disease typically increases
over time and can result in slowed sales growth or reduced sales for the Company’s products in that therapeutic category.

The  highly  competitive  animal  health  business  is  affected  by  several  factors  including  regulatory  and  legislative  issues,  scientific  and  technological
advances,  product  innovation,  the  quality  and  price  of  the  Company’s  products  as  well  as  competitors’  products,  effective  promotional  efforts  and  the  frequent
introduction of generic products by competitors.

Health Care Environment and Government Regulation

Global efforts toward health care cost containment continue to exert pressure on product pricing and market access.

United States

In the United States, federal and state governments for many years have pursued methods to reduce the cost of drugs and vaccines for which they pay.
For example, federal and state laws require the Company to pay specified rebates for medicines reimbursed by Medicaid and to provide discounts for medicines
purchased  by  certain  state  and  federal  entities  such  as  the  Department  of  Defense,  Veterans  Affairs,  Public  Health  Service  entities  and  hospitals  serving  a
disproportionate share of low income or uninsured patients.

Health Care Programs

The United States enacted major health care reform legislation in 2010 (the ACA). Various insurance market reforms have since advanced and state and
federal insurance exchanges were launched in 2014. With respect to the effect of the law on the pharmaceutical industry, the law increased the mandated Medicaid
rebate  from  15.1%  to  23.1%,  expanded  the  rebate  to  Medicaid  managed  care  utilization,  and  increased  the  types  of  entities  eligible  for  the  federal  340B  drug
discount program. The law also requires pharmaceutical manufacturers to pay 70% of the cost of the medicine, including biosimilar products, when Medicare Part
D beneficiaries are in the Medicare Part D coverage gap (i.e., the so-called “donut hole”), which increased from 50% beginning in 2019 as a result of the Balanced
Budget Act of 2018. Merck recorded approximately $700 million, $615 million and $365 million as a reduction to revenue in 2020, 2019, and 2018, respectively,
related to the donut hole provision. Also, pharmaceutical manufacturers are required to pay an annual non-tax deductible health care reform fee. The total annual
industry  fee  has  been  set  at  $2.8  billion.  The  fee  is  assessed  on  each  company  in  proportion  to  its  share  of  prior  year  branded  pharmaceutical  sales  to  certain
government programs, such as Medicare and Medicaid. The Company recorded approximately $85 million, $112 million, and $124 million of costs within Selling,
general and administrative

7

Table of Contents

expenses in 2020, 2019 and 2018, respectively,  for the annual health care reform fee. In February 2016, the Centers for Medicare & Medicaid Services (CMS)
issued the Medicaid rebate final rule that implemented provisions of the ACA effective April 1, 2016. The rule provides comprehensive guidance on the calculation
of Average Manufacturer Price and Best Price; two metrics utilized to determine the rebates drug manufacturers are required to pay to state Medicaid programs.
More recently, although CMS previously declined to define what constitutes a product “line extension” (beyond the statutory definition), CMS issued a new rule on
December 21, 2020 that will significantly expand the definition of the term “line extension” as of January 1, 2022 to include a broad range of products, including
products  reflecting  new  strengths,  dosage  forms,  release  mechanisms,  and  routes  of  administration.  This  expanded  definition  will  increase  the  number  of  drugs
subject  to  a  higher  Medicaid  rebate.  Effective  January  1, 2023, this  final  rule  also  changes  the  way that  manufacturers  must  calculate  Best  Price,  in  relation  to
certain  patient  support  programs,  including  coupons,  which  also  may  result  in  an  increase  in  the  Company’s  Medicaid  rebates.  The  impact  of  these  and  other
provisions in this final rule could adversely impact the Company’s business, cash flow, results of operations, financial condition and prospects.

The Patient Protection and Affordable Care Act

There is significant uncertainty about the future of the ACA in particular  and health care laws in general in the United States. In December 2018, a
Texas federal district court struck down the ACA on the grounds that the individual health insurance mandate is unconstitutional. The United States Supreme Court
heard arguments in this case on November 10, 2020.

The Company is participating in the health care debate and monitoring how any proposed changes could affect its business. The Company is unable to
predict  the  likelihood  of  changes  to  the  ACA.  Depending  on  the  nature  of  any  changes  to  the  ACA,  such  actions  could  have  a  material  adverse  effect  on  the
Company’s business, cash flow, results of operations, financial condition and prospects.

Other Legislative Changes

In addition, other legislative changes have been proposed and adopted in the United States since the ACA was enacted. A number of states have passed
pharmaceutical price and cost transparency laws. These laws typically require manufacturers to report certain product price information or other financial data to
the state. Some laws also require manufacturers to provide advance notification of price increases. The Company expects that states will continue their focus on
pharmaceutical price transparency and that this focus will continue to exert pressure on product pricing.

Drug Pricing

The  Company  also  faces  increasing  pricing  pressure  globally  from  managed  care  organizations,  government  agencies  and  programs  that  could
negatively affect the Company’s sales and profit margins, including, in the United States (i) practices of managed care organizations, federal and state exchanges,
and institutional and governmental purchasers, and (ii) federal laws and regulations related to Medicare and Medicaid, including the Medicare Prescription Drug,
Improvement, and Modernization Act of 2003 and the ACA.

In November 2020, the Department of Health and Human Services Office of Inspector General (OIG) issued a Final Rule that would, effective January
1, 2023, eliminate the Anti-Kickback Statute safe harbor for rebates paid to Medicare Part D plans or to pharmacy benefit managers (PBMs) on behalf of such
plans. While the Company cannot anticipate the effects of this change to the way it currently contracts, this new framework could significantly alter the way it does
business with Part D Plan Sponsors and PBMs on behalf of such plans. This rulemaking also established, effective January 1, 2021, a new safe harbor for point of
sale discounts at the pharmacy counter and a new safe harbor for certain services arrangements between pharmaceutical manufacturers and PBMs.

CMS  also  recently  issued  an  Interim  Final  Rule  (the  MFN  Rule)  that  alters  how  physicians  will  be  reimbursed  under  the  Medicare  program  for
physician  administered  drugs.  Pursuant  to  the  MFN  Rule,  which  was  intended  to  be  effective  January  1,  2021,  rather  than  use  the  current  Average  Sales  Price
(ASP)-based payment framework for certain physician-administered drugs, the MFN Rule would institute a new pricing system for certain prescription drugs and
biologic products covered by Medicare Part B in which Medicare would reimburse no more than the “most favored nation price,” meaning the lowest price after
adjusting for volume and differences in gross domestic product, for the top 50 Part B reimbursed products, which includes Keytruda, sold in 22 member countries
of the Organisation for Economic Co-operation and Development (OECD). Several organizations, including two

8

Table of Contents

trade groups of which Merck is a member, have filed suit challenging this regulation. Those lawsuits remain pending with a preliminary injunction having been
entered in one of the cases. At this time, the Company cannot predict with any certainty if or when the MFN Rule will go into effect. Implementation of the MFN
Rule could have a material adverse effect on the Company’s business, cash flow, results of operations, financial condition and prospects.

The  FDA  also  recently  issued  rulemaking  allowing  the  commercial  importation  of  certain  prescription  drugs  from  Canada  through  FDA-authorized,
time-limited programs sponsored by states or Native American tribes recognized under the rule, and, in certain future circumstances, pharmacists and wholesalers.
The FDA also recently released final guidance for industry detailing procedures for drug manufacturers to import FDA-approved prescription drug, biological, and
combination products that were manufactured abroad and authorized and intended for sale in a foreign country. A trade organization, in which Merck is a member,
brought suit, which remains pending in federal district court, challenging the commercial importation rule. These proposed changes could have a material adverse
effect on the Company’s business, cash flow, results of operations, financial condition and prospects.

Changes  to  the  health  care  system  enacted  as  part  of  health  care  reform  in  the  United  States,  as  well  as  increased  purchasing  power  of  entities  that
negotiate  on  behalf  of  Medicare,  Medicaid,  and  private  sector  beneficiaries,  could  result  in  further  pricing  pressures.  As  an  example,  health  care  reform  has
contributed to an increase in the number of patients in the Medicaid program under which sales of pharmaceutical products are subject to substantial rebates.

The pharmaceutical  industry also could be considered a potential source of savings via other legislative and administrative  proposals that have been

debated but not enacted. These types of revenue generating or cost saving proposals include additional direct price controls.

There was active consideration of drug-pricing related legislation in the last Congress, and it remains very uncertain as to what proposals, if any, may

be included as part of future federal legislative proposals that would directly or indirectly affect the Company.

In the U.S. private sector, consolidation and integration among health care providers is a major factor in the competitive marketplace for pharmaceutical
products. Health plans and PBMs have been consolidating into fewer, larger entities, thus enhancing their purchasing strength and importance. Private third-party
insurers, as well as governments, employ formularies to control costs by negotiating discounted prices in exchange for formulary inclusion. Failure to obtain timely
or adequate pricing or formulary placement for Merck’s products or obtaining such placement at unfavorable pricing could adversely affect revenue. In addition to
formulary  tier  co-pay  differentials,  private  health  insurance  companies  and  self-insured  employers  have  been  raising  co-payments  required  from  beneficiaries,
particularly for branded pharmaceuticals and biotechnology products. Private health insurance companies also are increasingly imposing utilization management
tools, such as clinical protocols, requiring prior authorization for a branded product if a generic product is available or requiring the patient to first fail on one or
more generic products before permitting access to a branded medicine. These same management tools are also used in treatment areas in which the payor has taken
the position that multiple branded products are therapeutically comparable. As the U.S. payor market concentrates further and as more drugs become available in
generic form, pharmaceutical companies may face greater pricing pressure from private third-party payors.

In order to provide information about the Company’s pricing practices, the Company annually posts on its website its Pricing Transparency Report for
the United States. The report provides the Company’s average annual list price, net price increases, and average discounts across the Company’s U.S. portfolio
dating back to 2010. In 2020, the Company’s gross U.S. sales were reduced by 45.5% as a result of rebates, discounts and returns. 

European Union

Efforts  toward  health  care  cost  containment  remain  intense  in  the  European  Union (EU).  The  Company  faces  competitive  pricing  pressure  resulting
from generic and biosimilar drugs. In addition, a majority of countries in the EU attempt to contain drug costs by engaging in reference pricing in which authorities
examine  pre-determined  markets  for  published  prices  of  drugs.  Reference  pricing  may  either  compare  a  product’s  prices  in  other  markets  (external  reference
pricing), or compare a product’s price with those of other products in a national class (internal reference pricing). The authorities then use the price data to set new
local prices for brand-name drugs, including the Company’s drugs. Guidelines for examining reference pricing are usually set in local markets and can be changed

9

Table of Contents

pursuant to local regulations. Some EU Member States have established free-pricing systems, but regulate the pricing for drugs through profit control plans. Others
seek to negotiate or set prices based on the cost-effectiveness of a product or an assessment of whether it offers a therapeutic benefit over other products in the
relevant class. The downward pressure on health care costs in general, particularly prescription drugs, has become intense. As a result, increasingly high barriers
are being erected to the entry of new products. In some EU Member States, cross-border imports from low-priced markets also exert competitive pressure that may
reduce pricing within an EU Member State.

Additionally,  EU  Member  States  have  the  power  to  restrict  the  range  of  pharmaceutical  products  for  which  their  national  health  insurance  systems
provide reimbursement. In the EU, pricing and reimbursement plans vary widely from Member State to Member State. Some EU Member States provide that drug
products  may  be  marketed  only  after  a  reimbursement  price  has  been  agreed.  Some  EU  Member  States  may  require  the  completion  of  additional  studies  that
compare the cost-effectiveness of a particular product candidate to already available therapies or so-called health technology assessments (HTA), in order to obtain
reimbursement or pricing approval. The HTA of pharmaceutical products is becoming an increasingly common part of the pricing and reimbursement procedures
in most EU Member States. The HTA process, which is governed by the national laws of these countries, involves the assessment of the cost-effectiveness, public
health  impact,  therapeutic  impact  and/or  the  economic  and  social  impact  of  use  of  a  given  pharmaceutical  product  in  the  national  health  care  system  of  the
individual  country  is  conducted.  Ultimately,  HTA  measures  the  added  value  of  a  new  health  technology  compared  to  existing  ones.  The  outcome  of  HTAs
regarding specific pharmaceutical products will often influence the pricing and reimbursement status granted to these pharmaceutical products by the regulatory
authorities of individual EU Member States. A negative HTA of one of the Company’s products may mean that the product is not reimbursable or may force the
Company to reduce its reimbursement price or offer discounts or rebates.

A negative HTA by a leading and recognized HTA body could also undermine the Company’s ability to obtain reimbursement for the relevant product
outside a jurisdiction. For example, EU Member States that have not yet developed HTA mechanisms may rely to some extent on the HTA performed in other
countries  with  a  developed  HTA  framework,  to  inform  their  pricing  and  reimbursement  decisions.  HTA  procedures  require  additional  data,  reviews  and
administrative  processes,  all of which increase  the complexity,  timing  and costs of obtaining product reimbursement  and exert downward pressure on available
reimbursement.

To  obtain  reimbursement  or  pricing  approval  in  some  EU  Member  States,  the  Company  may  be  required  to  conduct  studies  that  compare  the  cost-
effectiveness of the Company’s product candidates to other therapies that are considered the local standard of care. There can be no assurance that any EU Member
State will allow favorable pricing, reimbursement and market access conditions for any of the Company’s products, or that it will be feasible to conduct additional
cost-effectiveness studies, if required.

Brexit

In 2016, the United Kingdom (UK) held a referendum in which voters approved an exit from the EU, commonly referred to as “Brexit.” As a result of
that referendum and subsequent negotiations, the UK left the EU on January 31, 2020. A transitional period applied from January 31, 2020 until December 31,
2020,  and  during  this  period  the  EU  and  UK  operated  as  if  the  UK  was  an  EU  Member  State,  and  the  UK  continued  to  participate  in  the  EU  Customs  Union
allowing for the freedom of movement for people and goods.

It was announced on December 24, 2020, that the EU and the UK agreed to a Trade and Cooperation Agreement (TCA). The TCA sets out the new
arrangements for trade of goods, including medicines and vaccines, which allows goods to continue to flow between the EU and the UK. On December 29, 2020,
the Council of the EU adopted the decision to sign the TCA and for the TCA to be provisionally applied from January 1, 2021. The UK and EU signed the TCA on
December 30, 2020. In order for the TCA to be ratified and formally come into effect, the Council of the EU must unanimously approve the TCA and the European
Parliament must consent to it, which the Company believes will occur. As a result of the TCA, the Company believes that its operations will not be materially
adversely affected by Brexit.

10

Table of Contents

Japan

In  Japan,  the  pharmaceutical  industry  is  subject  to  government-mandated  biennial  price  reductions  of  pharmaceutical  products  and  certain  vaccines.
Furthermore,  the  government  can  order  re-pricings  for  specific  products  if  it  determines  that  use  of  such  product  will  exceed  certain  thresholds  defined  under
applicable re-pricing rules. The next government-mandated price reduction will occur in April 2021 and is expected to impact many Company products.

China

The Company’s business in China has grown rapidly in the past few years, and the importance of China to the Company’s overall pharmaceutical and
vaccines  business  has  increased  accordingly.  Continued  growth  of  the  Company’s  business  in  China  is  dependent  upon  ongoing  development  of  a  favorable
environment  for  innovative  pharmaceutical  products  and  vaccines,  sustained  access  for  the  Company’s  current  in-line  products,  and  the  absence  of  trade
impediments or adverse pricing controls. In recent years, the Chinese government has introduced and implemented a number of structural reforms to accelerate the
shift  to  innovative  products  and  reduce  costs.  Since  2017,  there  have  been  multiple  new  policies  introduced  by  the  government  to  improve  access  to  new
innovation, reduce the complexity of regulatory filings, and accelerate the review and approval process. This has led to a significant increase in the number of new
products being approved each year. Additionally, in 2017, the Chinese government updated the National Reimbursement Drug List (NRDL) for the first time in
eight years. While the mechanism for drugs being added to the list evolves, inclusion may require a price negotiation which could impact the outlook in the market
for selected brands. In 2020, drugs were added to the NRDL through double-digit price reductions. While pricing pressure has always existed in China, health care
reform  has  increased  this  pressure  in  part  due  to  the  acceleration  of  generic  substitution  through  volume  based  procurement  (VBP).  In  2019,  the  government
implemented  the VBP program  through  a  tendering  process  for mature  products  which have  generic  substitutes  with  a Generic  Quality  Consistency  Evaluation
approval. Mature products that have entered into the first three rounds of VBP have had, on average, a price reduction of 50%. The Company expects VBP to be a
semi-annual process that will have a significant impact on mature products moving forward.

Emerging Markets

The  Company’s  focus  on  emerging  markets,  in  addition  to  China,  has  continued.  Governments  in  many  emerging  markets  are  also  focused  on
constraining health care costs and have enacted price controls and measures impacting intellectual property, including in exceptional cases, threats of compulsory
licenses,  that  aim  to  put  pressure  on  the  price  of  innovative  pharmaceuticals  or  result  in  constrained  market  access  to  innovative  medicine.  The  Company
anticipates that pricing pressures and market access challenges will continue in the future to varying degrees in the emerging markets.

Beyond pricing and market access challenges, other conditions in emerging market countries can affect the Company’s efforts to continue to grow in
these  markets,  including  potential  political  instability,  changes  in  trade  sanctions  and  embargoes,  significant  currency  fluctuation  and  controls,  financial  crises,
limited or changing availability of funding for health care, credit worthiness of health care partners, such as hospitals, due to COVID-19, and other developments
that  may  adversely  impact  the  business  environment  for  the  Company.  Further,  the  Company  may  engage  third-party  agents  to  assist  in  operating  in  emerging
market countries, which may affect its ability to realize continued growth and may also increase the Company’s risk exposure.

In addressing cost containment pressures, the Company engages in public policy advocacy with policymakers and continues to work to demonstrate that
its medicines provide value to patients and to those who pay for health care. The Company advocates with government policymakers to encourage a long-term
approach  to sustainable  health  care  financing  that  ensures  access  to innovative  medicines  and does not disproportionately  target  pharmaceuticals  as a source  of
budget savings. In markets with historically low rates of health care spending, the Company encourages those governments to increase their investments and adopt
market reforms in order to improve their citizens’ access to appropriate health care, including medicines.

Operating  conditions  have  become  more  challenging  under  the  global  pressures  of  competition,  industry  regulation  and  cost  containment  efforts.
Although  no  one  can  predict  the  effect  of  these  and  other  factors  on  the  Company’s  business,  the  Company  continually  takes  measures  to  evaluate,  adapt  and
improve the organization and

11

Table of Contents

its business practices to better meet customer needs and believes that it is well-positioned to respond to the evolving health care environment and market forces.

Regulation

The  pharmaceutical  industry  is  also  subject  to  regulation  by  regional,  country,  state  and  local  agencies  around  the  world  focused  on  standards  and

processes for determining drug safety and effectiveness, as well as conditions for sale or reimbursement.

Of  particular  importance  is  the  FDA  in  the  United  States,  which  administers  requirements  covering  the  testing,  approval,  safety,  effectiveness,
manufacturing, labeling, and marketing of prescription pharmaceuticals. In some cases, the FDA requirements and practices have increased the amount of time and
resources  necessary  to  develop  new  products  and  bring  them  to  market  in  the  United  States.  At  the  same  time,  the  FDA  has  committed  to  expediting  the
development and review of products bearing the “breakthrough therapy” designation, which has accelerated the regulatory review process for medicines with this
designation. The FDA has also undertaken efforts to bring generic competition to market more efficiently and in a more timely manner.

The  EU  has  adopted  directives  and  other  legislation  concerning  the  classification,  approval  for  marketing,  labeling,  advertising,  manufacturing,
wholesale  distribution,  integrity  of  the  supply  chain,  pharmacovigilance  and  safety  monitoring  of  medicinal  products  for  human  use.  These  provide  mandatory
standards throughout the EU, which may be supplemented or implemented with additional regulations by the EU member states. In particular, EU regulators may
approve products subject to a number of post-authorization conditions. Examples of typical post-authorization commitments include additional pharmacovigilance,
the conduct of clinical trials, the establishment of patient registries, physician or patient education and controlled distribution and prescribing arrangements. Non-
compliance  with  post-authorization  conditions,  pharmacovigilance  and  other  obligations  can  lead  to  regulatory  action,  including  the  variation,  suspension  or
withdrawal of the marketing authorizations, or other enforcement or regulatory actions, including the imposition of financial penalties. The Company’s policies and
procedures are already consistent with the substance of these directives; consequently, it is believed that they will not have any material effect on the Company’s
business.

The Company believes that it will continue to be able to conduct its operations, including launching new drugs, in this regulatory environment. (See

“Research and Development” below for a discussion of the regulatory approval process.)

Access to Medicines

As a global health care company, Merck’s primary role is to discover and develop innovative medicines and vaccines. The Company also recognizes
that it has an important role to play in helping to improve access to its medicines, vaccines, and to quality health care around the world. The Company’s efforts in
this regard are wide-ranging and include a set of principles that the Company strives to embed into its operations and business strategies to guide the Company’s
worldwide approach to expanding access to health care. In addition, through innovative social investments, including philanthropic programs and impact investing,
Merck  is  also  helping  to  strengthen  health  systems  and  build  capacity,  particularly  in  under-resourced  communities.  The  Merck  Patient  Assistance  Program
provides medicines and adult vaccines for free to people in the United States who do not have prescription drug or health insurance coverage and who, without the
Company’s assistance, cannot afford their Merck medicines and vaccines. Merck has funded “Merck for Mothers,” a long-term effort with global health partners to
end  preventable  deaths  from  complications  of  pregnancy  and  childbirth.  Merck  has  also  provided  funds  to  the  Merck  Foundation,  an  independent  grantmaking
organization, which has partnered with a variety of organizations dedicated to improving global health.

Privacy and Data Protection

The Company is subject to a significant number of privacy and data protection laws and regulations globally, many of which place restrictions on the
Company’s ability to transfer, access and use personal data across its business. The legislative and regulatory landscape for privacy and data protection continues to
evolve. There has been increased attention to privacy and data protection issues in both developed and emerging markets with the potential to affect directly the
Company’s business, including the EU General Data Protection Regulation, (GDPR) which went into effect in May 2018 and imposes penalties of up to 4% of
global revenue.

12

Table of Contents

The GDPR and related implementing laws in individual EU Member States govern the collection and use of personal health data and other personal
data  in  the  EU.  The  GDPR  increased  responsibility  and  liability  in  relation  to  personal  data  that  the  Company  processes.  It  also  imposes  a  number  of  strict
obligations and restrictions on the ability to process (which includes collection, analysis and transfer of) personal data, including health data from clinical trials and
adverse  event  reporting.  The  GDPR  also  includes  requirements  relating  to  the  consent  of  the  individuals  to  whom  the  personal  data  relates,  the  information
provided to the individuals prior to processing their personal data or personal health data, notification of data processing obligations to the national data protection
authorities, and the security and confidentiality of the personal data. Further, the GDPR prohibits the transfer of personal data to countries outside of the EU that
are  not  considered  by  the  EC  to  provide  an  adequate  level  of  data  protection,  including  to  the  United  States,  except  if  the  data  controller  meets  very  specific
requirements.  Following  the  Schrems  II  decision  of  the  Court  of  Justice  of  the  European  Union  on  July  16,  2020,  there  is  considerable  uncertainty  as  to  the
permissibility of international data transfers under the GDPR. In light of the implications of this decision, the Company may face difficulties regarding the transfer
of personal data from the EU to third countries.

Failure to comply with the requirements of the GDPR and the related national data protection laws of the EU Member States may result in significant
monetary fines and other administrative penalties as well as civil liability claims from individuals whose personal data was processed. Data protection authorities
from  the  different  EU  Member  States  may  still  implement  certain  variations,  enforce  the  GDPR  and  national  data  protection  laws  differently,  and  introduce
additional national regulations and guidelines, which adds to the complexity of processing personal data in the EU. Guidance developed at both EU level and at the
national level in individual EU Member States concerning implementation and compliance practices is often updated or otherwise revised.

There  is,  moreover,  a  growing  trend  towards  required  public  disclosure  of  clinical  trial  data  in  the  EU  which  adds  to  the  complexity  of  obligations
relating  to  processing  health  data  from  clinical  trials.  Failing  to  comply  with  these  obligations  could  lead  to  government  enforcement  actions  and  significant
penalties  against  the Company,  harm  to its reputation,  and adversely  impact  its business and operating  results.  The uncertainty  regarding  the  interplay  between
different regulatory frameworks further adds to the complexity that the Company faces with regard to data protection regulation.

Additional laws and regulations enacted  in the United States (such as the California  Consumer Privacy Act), Europe, Asia and Latin America,  have
increased  enforcement  and  litigation  activity  in  the  United  States  and  other  developed  markets,  as  well  as  increased  regulatory  cooperation  among  privacy
authorities  globally.  The  Company  has  adopted  a  comprehensive  global  privacy  program  to  manage  these  evolving  risks  and  facilitate  the  transfer  of  personal
information across international borders.

Distribution

The Company sells its human health pharmaceutical products primarily to drug wholesalers and retailers, hospitals, government agencies and managed
health care providers, such as health maintenance organizations, PBMs and other institutions. Human health vaccines are sold primarily to physicians, wholesalers,
physician  distributors  and  government  entities.  The  Company’s  professional  representatives  communicate  the  effectiveness,  safety  and  value  of  the  Company’s
pharmaceutical and vaccine products to health care professionals in private practice, group practices, hospitals and managed care organizations. The Company sells
its animal health products to veterinarians, distributors and animal producers.

Patents, Trademarks and Licenses

Patent protection is considered, in the aggregate, to be of material importance to the Company’s marketing of its products in the United States and in
most  major  foreign  markets.  Patents  may  cover  products  per  se,  pharmaceutical  formulations,  processes  for,  or  intermediates  useful  in,  the  manufacture  of
products, or the uses of products. Protection for individual products extends for varying periods in accordance with the legal life of patents in the various countries.
The protection afforded, which may also vary from country to country, depends upon the type of patent and its scope of coverage.

The Food and Drug Administration Modernization Act includes a Pediatric Exclusivity Provision that may provide an additional six months of market
exclusivity in the United States for indications of new or currently marketed drugs if certain agreed upon pediatric studies are completed by the applicant. Current
U.S. patent law

13

Table of Contents

provides additional patent term for periods when the patented product was under regulatory review by the FDA. The EU also provides an additional six months of
pediatric market exclusivity attached to a product’s Supplementary Protection Certificate (SPC). Japan provides the additional term for pediatric studies attached to
market exclusivity unrelated to patent term.

Patent portfolios developed for products introduced by the Company normally provide market exclusivity. The Company has the following key patent
protection in the United States, the EU, Japan and China (including the potential for patent term extensions (PTE) and SPCs where indicated) for the following
marketed products:

(7)

(6)

Product
Januvia
Janumet
Janumet XR
Isentress
Simponi
Lenvima
Adempas
Bridion
Nexplanon
Bravecto
Gardasil
Gardasil 9
Keytruda
Lynparza
Zerbaxa
Sivextro
Belsomra
Prevymis
Segluromet
(9)
Steglatro
Steglujan
Verquvo
Delstrigo
Pifeltro
Recarbrio

(9)

(8)

(7)

(9)

(3)

(3)

(3)

Year of Expiration (U.S.)
2023
2023
2023
2024
(4)
N/A
2025  (with pending PTE)
2026
2026  (with pending PTE)
2027 (device)
2027 (with pending PTE)
2028
2028
2028
2028 (with pending PTE)
2028
2028
2029
2029  (with pending PTE)
2031 (with pending PTE)
2031  (with pending PTE)
2031 (with pending PTE)
2031 (with pending PTE)
2032 (with pending PTE)
2032 (with pending PTE)
2033 (with pending PTE)

(3) 

(3) 

(3)

(3)

(3)

(3)

(1)

(3)

(3)

(5)

(3)

(3)

Year of Expiration (EU)
2022
2023
N/A
2023
2024
2021 (patents), 2026  (SPCs)
2028
2023
2025 (device)
2025 (patents), 2029 (SPCs)
2021
2025 (patents), 2030  (SPCs)
2028 (patents), 2030  (SPCs)
2024 (patents), 2029  (SPCs)
2023 (patents), 2028  (SPCs)
2024 (patents), 2029 (SPCs)
N/A
2024 (patents), 2029 (SPCs)
2029 (patents), 2034 (SPCs)
2029 (patents), 2034  (SPCs)
2029 (patents), 2034 (SPCs)
N/A
2031 (patents), 2033 (SPCs)
2031 (patents), 2033 (SPCs)
N/A

(11)

(3) 

(3)

(3)

(3)

(3)

(3)

Year of Expiration (Japan)
2025-2026
N/A
N/A
2022-2026
(4)
N/A
2026
2027-2028
2024
N/A
2029
Expired
N/A
2032-2033
2028-2029
2028 (with pending PTE)
2029
2031
2029
N/A
N/A
N/A
N/A
N/A
2036
N/A

(10)

(10)

(10)

(11)

(2)

Year of Expiration (China)
2022
2022
2022
2022
(4)
N/A
2021
2023
Expired
2025
2033
N/A
2025
2028
2024
N/A
2024
N/A
N/A
N/A
2029
N/A
N/A
N/A
2031
N/A

(11)

Note:    Compound patent unless otherwise noted. Certain of the products listed may be the subject of patent litigation. See Item 8. “Financial Statements and Supplementary Data,” Note 10.

“Contingencies and Environmental Liabilities” below.

N/A:    Currently no marketing approval.

14

 
Table of Contents

(1)

The EU date represents the expiration date for the following five countries: France, Germany, Italy, Spain and the United Kingdom (Major EU Markets). If SPC applications have been filed
but have not been granted in all Major EU Markets, both the patent expiry date and the SPC expiry date are listed.

(2)    

The PTE system in Japan allows for a patent to be extended more than once provided the later approval is directed to a different indication from that of the previous approval. This may
result in multiple PTE approvals for a given patent, each with its own expiration date.

(3)

    Eligible for 6 months Pediatric Exclusivity.

(4)

    The Company has no marketing rights in the U.S., Japan or China.

(5)

    Expiration of the distribution agreement with Janssen Pharmaceuticals, Inc.

(6)    

Part of a global strategic oncology collaboration with Eisai.

(7)

    Being commercialized in a worldwide collaboration with Bayer AG.

(8)

    Part of a global strategic oncology collaboration with AstraZeneca.

(9)

    Being commercialized and promoted in a worldwide, except Japan, collaboration with Pfizer Inc.

(10)    

The Company has no marketing rights in Japan.

(11)    

The Company has no marketing rights in the EU, Japan or China.

The Company also has the following key U.S. patent protection for drug candidates under review or in Phase 3 development: 

Phase 3 Drug Candidate
MK-7264 (gefapixant)
V114 (pneumoconjugate vaccine)
MK-7110 (CD24Fc)
MK-8591A (islatravir/doravirine)
MK-6482 (belzutifan)

Currently Anticipated
Year of Expiration (in the U.S.)
2027
2031 (vaccine composition)
2031
2032
2034

Unless otherwise noted, the patents in the above charts are compound patents. Each patent may be subject to a future patent term restoration of up to
five years and six month pediatric market exclusivity, either or both of which may be available. In addition, depending on the circumstances surrounding any final
regulatory approval of the compound, there may be other listed patents or patent applications pending that could have relevance to the product as finally approved;
the relevance of any such application would depend upon the claims that ultimately may be granted and the nature of the final regulatory approval of the product.
Also, regulatory exclusivity tied to the protection of clinical data is complementary to patent protection and, in some cases, may provide more effective or longer
lasting marketing exclusivity than a compound’s patent estate. In the United States, the data protection generally runs five years from first marketing approval of a
new chemical entity, extended to seven years for an orphan drug indication and 12 years from first marketing approval of a biological product.

While the expiration of a product patent normally results in a loss of market exclusivity for the covered pharmaceutical product, commercial benefits
may  continue  to  be  derived  from:  (i)  later-granted  patents  on  processes  and  intermediates  related  to  the  most  economical  method  of  manufacture  of  the  active
ingredient of such product; (ii) patents relating to the use of such product; (iii) patents relating to novel compositions and formulations; and (iv) in the United States
and certain other countries, market exclusivity that may be available under relevant law. The effect of product patent expiration on pharmaceutical products also
depends upon many other factors such as the nature of the market and the position of the product in it, the growth of the market, the complexities and economics of
the process for manufacture of the active ingredient of the product and the requirements of new drug provisions of the Federal Food, Drug and Cosmetic Act or
similar laws and regulations in other countries.

Additions to market exclusivity are sought in the United States and other countries through all relevant laws, including laws increasing patent life. Some
of  the  benefits  of  increases  in  patent  life  have  been  partially  offset  by  an  increase  in  the  number  of  incentives  for  and  use  of  generic  products.  Additionally,
improvements in intellectual property laws are sought in the United States and other countries through reform of patent and other relevant laws and implementation
of international treaties.

For  further  information  with  respect  to  the  Company’s  patents,  see  Item  1A.  “Risk  Factors”  and  Item  8.  “Financial  Statements  and  Supplementary

Data,” Note 10. “Contingencies and Environmental Liabilities” below.

15

Table of Contents

Worldwide,  all  of  the  Company’s  important  products  are  sold  under  trademarks  that  are  considered  in  the  aggregate  to  be  of  material  importance.
Trademark  protection continues in some countries  as long as used; in other countries,  as long as registered.  Registration is for fixed terms  and can be renewed
indefinitely.

Royalty income in 2020 on patent and know-how licenses and other rights amounted to $185 million. Merck also incurred royalty expenses amounting

to $2.0 billion in 2020 under patent and know-how licenses it holds.

Research and Development

The  Company’s  business  is  characterized  by  the  introduction  of  new  products  or  new  uses  for  existing  products  through  a  strong  research  and
development  program.  At  December  31,  2020,  approximately  16,750  people  were  employed  in  the  Company’s  research  activities.  The  Company  prioritizes  its
research and development efforts and focuses on candidates that it believes represent breakthrough science that will make a difference for patients and payers.

The Company maintains a number of long-term exploratory and fundamental research programs in biology and chemistry as well as research programs
directed toward product development. The Company’s research and development model is designed to increase productivity and improve the probability of success
by  prioritizing  the  Company’s  research  and  development  resources  on  candidates  the  Company  believes  are  capable  of  providing  unambiguous,  promotable
advantages to patients and payers and delivering the maximum value of its approved medicines and vaccines through new indications and new formulations. Merck
is  pursuing  emerging  product  opportunities  independent  of  therapeutic  area  or  modality  (small  molecule,  biologics  and  vaccines)  and  is  building  its  biologics
capabilities.  The  Company  is  committed  to  ensuring  that  externally  sourced  programs  remain  an  important  component  of  its  pipeline  strategy,  with  a  focus  on
supplementing its internal research with a licensing and external alliance strategy focused on the entire spectrum of collaborations from early research to late-stage
compounds, as well as access to new technologies.

The Company’s clinical pipeline includes candidates in multiple disease areas, including cancer, cardiovascular diseases, metabolic diseases, infectious

diseases, neurosciences, respiratory diseases, and vaccines.

In the development of human health products, industry practice and government regulations in the United States and most foreign countries provide for
the  determination  of  effectiveness  and  safety  of  new  chemical  compounds  through  pre-clinical  tests  and  controlled  clinical  evaluation.  Before  a  new  drug  or
vaccine may be marketed in the United States, recorded data on pre-clinical and clinical experience are included in the New Drug Application (NDA) for a drug or
the Biologics License Application (BLA) for a vaccine or biologic submitted to the FDA for the required approval.

Once the Company’s scientists  discover  a new small  molecule  compound or biologic  that they believe  has promise to treat  a medical  condition,  the
Company commences pre-clinical testing with that compound. Pre-clinical testing includes laboratory testing and animal safety studies to gather data on chemistry,
pharmacology,  immunogenicity  and  toxicology.  Pending  acceptable  pre-clinical  data,  the  Company  will  initiate  clinical  testing  in  accordance  with  established
regulatory  requirements.  The  clinical  testing  begins  with  Phase  1  studies,  which  are  designed  to  assess  safety,  tolerability,  pharmacokinetics,  and  preliminary
pharmacodynamic activity of the compound in humans. If favorable, additional, larger Phase 2 studies are initiated to determine the efficacy of the compound in
the affected population, define appropriate dosing for the compound, as well as identify any adverse effects that could limit the compound’s usefulness. In some
situations, the clinical program incorporates adaptive design methodology to use accumulating data to decide how to modify aspects of the ongoing clinical study
as it continues, without undermining the validity and integrity of the trial. One type of adaptive clinical trial is an adaptive Phase 2a/2b trial design, a two-stage trial
design consisting of a Phase 2a proof-of-concept stage and a Phase 2b dose-optimization finding stage. If data from the Phase 2 trials are satisfactory, the Company
commences large-scale Phase 3 trials to confirm the compound’s efficacy and safety. Another type of adaptive clinical trial is an adaptive Phase 2/3 trial design, a
study that includes an interim analysis and an adaptation that changes the trial from having features common in a Phase 2 study (e.g. multiple dose groups) to a
design similar to a Phase 3 trial. An adaptive Phase 2/3 trial design reduces timelines by eliminating activities which would be required to start a separate study.
Upon completion of Phase 3 trials, if satisfactory, the Company submits regulatory filings with the appropriate regulatory agencies around the world to have the
product candidate approved for marketing. There can

16

Table of Contents

be no assurance that a compound that is the result of any particular program will obtain the regulatory approvals necessary for it to be marketed.

Vaccine development follows the same general pathway as for drugs. Pre-clinical testing focuses on the vaccine’s safety and ability to elicit a protective
immune response (immunogenicity). Pre-marketing vaccine clinical trials are typically done in three phases. Initial Phase 1 clinical studies are conducted in normal
subjects to evaluate the safety, tolerability and immunogenicity of the vaccine candidate. Phase 2 studies are dose-ranging studies. Finally, Phase 3 trials provide
the necessary data on effectiveness and safety. If successful, the Company submits regulatory filings with the appropriate regulatory agencies.

In  the  United  States,  the  FDA  review  process  begins  once  a  complete  NDA  or  BLA  is  submitted,  received  and  accepted  for  review  by  the  agency.
Within 60 days after receipt, the FDA determines if the application is sufficiently complete to permit a substantive review. The FDA also assesses, at that time,
whether the application will be granted a priority review or standard review. Pursuant to the Prescription Drug User Fee Act V (PDUFA), the FDA review period
target  for  NDAs  or  original  BLAs  is  either  six  months,  for  priority  review,  or  ten  months,  for  a  standard  review,  from  the  time  the  application  is  deemed
sufficiently complete. Once the review timelines are determined, the FDA will generally act upon the application within those timelines, unless a major amendment
has been submitted (either at the Company’s own initiative or the FDA’s request) to the pending application. If this occurs, the FDA may extend the review period
to allow for review of the new information, but by no more than three months. Extensions to the review period are communicated to the Company. The FDA can
act on an application either by issuing an approval letter or by issuing a Complete Response Letter (CRL) stating that the application will not be approved in its
present form and describing all deficiencies that the FDA has identified. Should the Company wish to pursue an application after receiving a CRL, it can resubmit
the application with information that addresses the questions or issues identified by the FDA in order to support approval. Resubmissions are subject to review
period targets, which vary depending on the underlying submission type and the content of the resubmission.

The FDA has four program designations — Fast Track, Breakthrough Therapy, Accelerated Approval, and Priority Review — to facilitate and expedite
development  and  review  of  new  drugs  to  address  unmet  medical  needs  in  the  treatment  of  serious  or  life-threatening  conditions.  The  Fast  Track  designation
provides pharmaceutical manufacturers with opportunities for frequent interactions with FDA reviewers during the product’s development and the ability for the
manufacturer to do a rolling submission of the NDA/BLA. A rolling submission allows completed portions of the application to be submitted and reviewed by the
FDA on an ongoing basis. The Breakthrough Therapy designation provides manufacturers with all of the features of the Fast Track designation as well as intensive
guidance on implementing an efficient development program for the product and a commitment by the FDA to involve senior managers and experienced staff in
the  review.  The  Accelerated  Approval  designation  allows  the  FDA  to  approve  a  product  based  on  an  effect  on  a  surrogate  or  intermediate  endpoint  that  is
reasonably likely to predict a product’s clinical benefit and generally requires the manufacturer to conduct required post-approval confirmatory trials to verify the
clinical benefit. The Priority Review designation means that the FDA’s goal is to take action on the NDA/BLA within six months, compared to ten months under
standard review. More than one of these special designations can be granted for a given application (i.e., a product designated as a Breakthrough Therapy may also
be eligible for Priority Review).

Due to the COVID-19 public health crisis, the United States Secretary of Health and Human Services has exercised statutory authority to determine that
a public health emergency exists, and declare these circumstances justify the emergency use of drugs and biological products as authorized by the FDA. While in
effect,  this  declaration  enables  the  FDA  to  issue  Emergency  Use  Authorizations  (EUAs)  permitting  distribution  and  use  of  specific  medical  products  absent
NDA/BLA submission or approval, including products to treat or prevent diseases or conditions caused by the SARS-CoV-2 virus, subject to the terms of any such
EUAs. The FDA must make certain findings to grant an EUA, including that it is reasonable to believe based on the totality of evidence that the drug or biologic
may be effective, and that known or potential benefits when used under the terms of the EUA outweigh known or potential risks. Additionally, the FDA must find
that there is no adequate, approved and available alternative to the emergency use.

The primary method the Company uses to obtain marketing authorization of pharmaceutical products in the EU is through the “centralized procedure.”

This procedure is compulsory for certain pharmaceutical products, in

17

Table of Contents

particular  those  using  biotechnological  processes,  and  is  also  available  for  certain  new  chemical  compounds  and  products.  A  company  seeking  to  market  an
innovative pharmaceutical product through the centralized procedure must file a complete set of safety data and efficacy data as part of a Marketing Authorization
Application (MAA) with the European Medicines Agency (EMA). After the EMA evaluates the MAA, it provides a recommendation to the EC and the EC then
approves or denies the MAA. It is also possible for new chemical products to obtain marketing authorization in the EU through a “mutual recognition procedure” in
which an application is made to a single member state and, if the member state approves the pharmaceutical product under a national procedure, the applicant may
submit that approval to the mutual recognition procedure of some or all other EU member states.

Outside  of  the  United  States  and  the  EU,  the  Company  submits  marketing  applications  to  national  regulatory  authorities.  Examples  of  such  are  the
Ministry  of  Health,  Labour  and  Welfare  in  Japan,  the  National  Medical  Products  Administration  in  China,  Health  Canada,  Agência  Nacional  de  Vigilância
Sanatária in Brazil, Korea Food and Drug Administration in South Korea, and the Therapeutic Goods Administration in Australia. Each country has a separate and
independent review process and timeline. In many markets, approval times can be longer as the regulatory authority requires approval in a major market, such as
the United States or the EU, and issuance of a Certificate of Pharmaceutical Product from that market before initiating their local review process.

Research and Development Update

The Company currently has several candidates under regulatory review in the United States and internationally or in late-stage clinical development.

MK-7655A is combination of relebactum, a beta-lactamase inhibitor, and imipenem/cilastatin (a carbapenem antibiotic) under review in Japan for the

treatment of bacterial infection. MK-7655A was approved by the FDA in 2019 and is marketed in the United States as Recarbrio.

MK-1242, vericiguat, is an orally administered soluble guanylate cyclase (sGC) stimulator under review in the EU and in Japan to reduce the risk of
cardiovascular  death  and  heart  failure  hospitalization  following  a  worsening heart  failure  event  in  patients  with  symptomatic  chronic  heart  failure  with  reduced
ejection  fraction,  in  combination  with  other  heart  failure  therapies.  The  applications  are  based  on  results  from  the  Phase  3  VICTORIA  trial.  Vericiguat  was
approved  by  the  FDA  in  January  2021  and  will  be  marketed  in  the  United  States  as  Verquvo.  Vericiguat  is  being  jointly  developed  with  Bayer.  Bayer  will
commercialize vericiguat in territories outside the United States, if approved.

MK-5618, selumetinib, is under review in the EU for the treatment of pediatric patients two years of age and older with neurofibromatosis type 1 (NF1)
who  have  symptomatic,  inoperable  plexiform  neurofibromas  (PN)  based  on  positive  results  from  the  National  Cancer  Institute  Cancer  Therapy  Evaluation
Program-sponsored  Phase  2  SPRINT  Stratum  1  trial.  Selumetinib  was  approved  by  the  FDA  in  April  2020  and  is  marketed  in  the  United  States  as  Koselugo.
Selumetinib is being jointly developed and commercialized with AstraZeneca globally.

V114 is an investigational 15-valent pneumococcal conjugate vaccine under priority review by the FDA for the prevention of invasive pneumococcal
disease in adults 18 years of age and older. The FDA set a PDUFA date of July 18, 2021. The EMA is also reviewing an application for licensure of V114 in adults.
Additionally, the Company has several ongoing Phase 3 trials evaluating V114 in pediatric patients. V114 previously received Breakthrough Therapy designation
from  the  FDA  for  the  prevention  of  invasive  pneumococcal  disease  in  pediatric  patients  6  weeks  to  18  years  of  age  and  adults  18  years  of  age  and  older.  The
Company is involved in litigation challenging the validity of several Pfizer Inc. patents that relate to pneumococcal vaccine technology in the United States and
several foreign jurisdictions.

Keytruda is an anti-PD-1 therapy approved for the treatment of many cancers that is in clinical development for expanded indications. These approvals
were the result of a broad clinical development program that currently consists of more than 1,400 clinical trials, including more than 1,000 trials that combine
Keytruda with other cancer treatments. These studies encompass more than 30 cancer types including: biliary tract, cervical, colorectal, cutaneous squamous cell,
endometrial,  esophageal,  estrogen  receptor  positive  breast  cancer,  gastric,  glioblastoma,  head  and  neck,  hepatocellular,  Hodgkin  lymphoma,  non-Hodgkin
lymphoma,  non-small-cell  lung,  small-cell  lung,  melanoma,  mesothelioma,  ovarian,  prostate,  renal,  triple-negative  breast,  and  urothelial,  many  of  which  are
currently in Phase 3 clinical development. Further trials are being planned for other cancers.

18

Table of Contents

Keytruda in combination with chemotherapy is under review in the EU for the treatment of locally recurrent unresectable or metastatic triple negative
breast cancer (TNBC) in adults whose tumors express PD-L1 with a CPS ≥ 10 and who have not received prior chemotherapy for metastatic disease based on the
results of the KEYNOTE-355 trial. Keytruda was approved for this indication under accelerated approval based on progression-free survival (PFS) by the FDA in
November 2020. Keytruda in  combination  with  chemotherapy  is  also  under  review  in  Japan  for  the  treatment  of  patients  with  locally  recurrent  unresectable  or
metastatic TNBC based on data from the KEYNOTE-355 trial.

In July 2020, the FDA accepted for standard review a supplemental BLA for Keytruda for the treatment of patients with high-risk, early-stage TNBC in
combination  with  chemotherapy  as  neoadjuvant  (pre-operative)  treatment,  and  then  as  a  single  agent  as  adjuvant  (post-operative)  treatment  after  surgery.  The
application  was based on data  from the first  and second interim  analyses of the KEYNOTE-522 trial.  In February 2021, the FDA’s Oncologic  Drugs Advisory
Committee (ODAC), which discussed the Company’s supplemental BLA for Keytruda, voted that a regulatory decision should be deferred until further data are
available from the Phase 3 KEYNOTE-522 trial. The study met one of the dual primary endpoints of pathological complete response and is continuing to evaluate
event-free survival. The ODAC provides the FDA with independent, expert advice and recommendations on marketed and investigational medicines for use in the
treatment of cancer. The FDA is not bound by the committee’s guidance but takes its advice into consideration. The PDUFA date for this application is March 29,
2021. The next interim analysis is calendar-driven, and data is expected in the third quarter of 2021.

In  February  2021,  Merck  announced  that  the  Committee  for  Medicinal  Products  for  Human  Use  (CHMP)  of  the  EMA  adopted  a  positive  opinion
recommending approval of an expanded label for Keytruda as monotherapy for the treatment of adult and pediatric patients aged 3 years and older with relapsed or
refractory  cHL  who  have  failed  an  earlier  line  of  therapy.  This  recommendation  is  based  on  results  from  the  pivotal  Phase  3  KEYNOTE-204  trial,  in  which
Keytruda monotherapy demonstrated a significant improvement in PFS compared with brentuximab vedotin, a commonly used treatment. The recommendation is
also based on supportive data from an updated analysis of the KEYNOTE-087 trial, which supported EC approval of Keytruda for the treatment of adult patients
with relapsed or refractory cHL. The CHMP’s recommendation will now be reviewed by the EC for marketing authorization in the EU. Keytruda was approved for
this indication by the FDA in October 2020.

Keytruda is also under review as monotherapy for the first-line treatment of adult patients with metastatic MSI-H or dMMR colorectal cancer in Japan

based on the result of the KEYNOTE-177 trial. Keytruda was approved for this indication by the FDA in June 2020 and by the EU in January 2021.

In January 2021, the FDA accepted a supplemental BLA seeking use of Keytruda for the treatment of patients with locally advanced cSCC that is not

curable by surgery or radiation based on the results of the KEYNOTE-629 trial. The FDA set a PDUFA date of September 9, 2021.

In December 2020, the FDA accepted and granted priority review for a supplemental BLA for Keytruda in combination with chemotherapy for the first-
line treatment of patients with locally advanced unresectable or metastatic carcinoma of the esophagus and gastroesophageal junction. This supplemental BLA is
based  on  data  from  the  pivotal  Phase  3  KEYNOTE-590  trial,  in  which  Keytruda plus  chemotherapy  demonstrated  significant  improvements  in  the  primary
endpoints  of  overall  survival  (OS) and  PFS versus  chemotherapy  in  these  patients  regardless  of  PD-L1 expression  status  and  tumor  histology.  These  data  were
presented at the European Society of Medical Oncology (ESMO) Virtual Congress 2020. The FDA set a PDUFA date of April 13, 2021. In December 2020, the
CHMP  of  the  EMA  announced  the  start  of  a  procedure  to  extend  the  indication  to  include  in  combination  with  chemotherapy,  first-line  treatment  of  locally
advanced unresectable or metastatic carcinoma of the esophagus or HER-2 negative gastroesophageal junction adenocarcinoma in adults for Keytruda, based on the
results from KEYNOTE-590. Keytruda is also under review for this indication in Japan.

Keytruda also received Breakthrough Therapy designation from the FDA in February 2020 for the combination of  Keytruda with Padcev (enfortumab
vedotin-ejfv),  in  the  first-line  setting  for  the  treatment  of  patients  with  unresectable  locally  advanced  or  metastatic  urothelial  cancer  who  are  not  eligible  for
cisplatin-containing  chemotherapy.  The  FDA’s  Breakthrough  Therapy  designation  is  intended  to  expedite  the  development  and  review  of  a  candidate  that  is
planned for use, alone or in combination, to treat a serious or life-threatening disease or condition when preliminary clinical evidence indicates that the drug may
demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints.

19

Table of Contents

In  January  2021,  Merck  announced  first-time  data  from  the  Phase  3  KEYNOTE-598  study  evaluating  Keytruda in  combination  with  ipilimumab
(Yervoy) compared with Keytruda monotherapy as first-line treatment for patients with metastatic NSCLC without EGFR or ALK genomic tumor aberrations and
whose tumors express PD-L1 (tumor proportion score ≥50%). Results of the study showed that the addition of ipilimumab to Keytruda did not improve OS or PFS
but added toxicity compared with Keytruda monotherapy in these patients. These results were presented in the Presidential Symposium at the IASLC 2020 World
Conference  on  Lung  Cancer  hosted  by  the  International  Association  for  the  Study  of  Lung  Cancer  in  January  2021  and  published  in  the  Journal  of  Clinical
Oncology.  As  previously  announced  in  November  2020,  the  study  was  discontinued  due  to  futility  based  on  the  recommendation  of  an  independent  Data
Monitoring Committee (DMC), which determined the benefit/risk profile of Keytruda in combination with ipilimumab did not support continuing the trial. The
DMC also advised that patients in the study discontinue treatment with ipilimumab/placebo.

In  February  2021,  Merck’s  announced  that  the  Phase  3  KEYNOTE-122  trial  evaluating  Keytruda versus  standard  of  care  treatment  (capecitabine,
gemcitabine, or docetaxel) for the treatment of recurrent or metastatic nasopharyngeal cancer did not meet its primary endpoint of OS. Full results will be presented
at a future medical meeting.

In May 2020, Merck and Eisai presented data from analyses of two Phase 2 trials evaluating Keytruda plus Lenvima at the 2020 American Society of
Clinical Oncology (ASCO) Annual Meeting in which the Keytruda plus Lenvima combination demonstrated clinically meaningful objective response rates (ORR):
the KEYNOTE-524/Study 116 trial  in patients  with unresectable  HCC with no  prior  systemic  therapy;  and the KEYNOTE-146/Study 111 trial  in patients  with
metastatic clear cell renal cell carcinoma (ccRCC) who progressed following immune checkpoint inhibitor therapy.

In July 2020, Merck and Eisai announced that the FDA issued a CRL regarding Merck’s and Eisai’s applications seeking accelerated approval for the
first-line  treatment  of  patients  with  unresectable  HCC  based  on  this  trial,  which  showed  clinically  meaningful  efficacy  in  the  single-arm  setting.  These  data
supported a Breakthrough Therapy designation granted by the FDA in July 2019. Ahead of the PDUFA action dates of Merck’s and Eisai’s applications, another
combination therapy was approved based on a randomized, controlled trial that demonstrated improvement in OS versus standard-of-care treatment. Consequently,
the CRL stated that Merck’s and Eisai’s applications do not provide evidence that Keytruda in combination with Lenvima represents a meaningful advantage over
available therapies for the treatment of unresectable or metastatic HCC with no prior systemic therapy for advanced disease. Since the applications for KEYNOTE-
524/Study  116  no  longer  meet  the  criteria  for  accelerated  approval,  both  companies  plan  to  work  with  the  FDA  to  take  appropriate  next  steps,  which  include
conducting a well-controlled clinical trial that demonstrates substantial evidence of effectiveness and the clinical benefit of the combination. As such, LEAP-002,
the Phase 3 trial evaluating the Keytruda plus Lenvima combination as a first-line treatment for advanced HCC, is currently underway and fully enrolled. The CRL
does not impact the current approved indications for Keytruda or for Lenvima.

In February 2021, Merck and Eisai announced the first presentation of new investigational data from the pivotal Phase 3 CLEAR study (KEYNOTE-
581/Study  307)  at  the  2021  Genitourinary  Cancers  Symposium  (ASCO  GU)  and  published  simultaneously  in  the  New  England  Journal  of  Medicine.  The  trial
evaluated the combinations of Keytruda plus Lenvima, and Lenvima plus everolimus versus sunitinib for the first-line treatment of patients with advanced RCC.
Keytruda plus  Lenvima  demonstrated  statistically  significant  and  clinically  meaningful  improvements  in  PFS,  OS  and  ORR  versus  sunitinib.  Lenvima  plus
everolimus also showed significant improvements in PFS and ORR versus sunitinib. Merck and Eisai will discuss these data with regulatory authorities worldwide,
with the intent to submit marketing authorization applications based on these results.

In December 2020, Merck and Eisai announced that the pivotal Phase 3 KEYNOTE-775/Study 309 trial evaluating the investigational use of Keytruda
plus Lenvima met its dual primary endpoints of OS and PFS and its secondary efficacy endpoint of ORR in patients with advanced endometrial cancer following at
least one prior platinum-based regimen. These positive results were observed in the mismatch repair proficient (pMMR) subgroup and the ITT study population,
which includes both patients with endometrial carcinoma that is pMMR as well as patients whose disease is MSI-H/dMMR. Based on an analysis conducted by an
independent  DMC,  Keytruda plus  Lenvima  demonstrated  a  statistically  significant  and  clinically  meaningful  improvement  in  OS,  PFS  and  ORR  versus
chemotherapy. Merck and Eisai will discuss these data with regulatory authorities worldwide, with the intent to

20

Table of Contents

submit marketing authorization applications based on these results, and plan to present these results at an upcoming medical meeting. KEYNOTE-775/Study 309 is
the confirmatory trial for KEYNOTE-146/Study 111, which supported accelerated approval by the FDA in 2019 of the Keytruda plus Lenvima combination for the
treatment of patients with advanced endometrial carcinoma that is not MSI-H or dMMR, who have disease progression following prior systemic therapy and are
not candidates for curative surgery or radiation.

Merck and Eisai are continuing to study the Keytruda plus Lenvima combination through the LEAP (LEnvatinib And Pembrolizumab) clinical program
across 19 trials in 13 different tumor types (endometrial carcinoma, HCC, melanoma, NSCLC, RCC, squamous cell carcinoma of the head and neck, urothelial
cancer, biliary tract cancer, colorectal cancer, gastric cancer, glioblastoma, ovarian cancer, and TNBC).

MK-6482, belzutifan, is an investigational hypoxia-inducible factor-2α (HIF-2α) inhibitor being evaluated for the treatment of patients with von Hippel-
Lindau (VHL) disease-associated RCC with nonmetastatic RCC tumors less than three centimeters in size, unless immediate surgery is required. In July 2020, the
FDA granted Breakthrough Therapy designation to belzutifan and has also granted orphan drug designation to belzutifan for VHL disease. These designations are
based  on  data  from  a  Phase  2  trial  evaluating  belzutifan in  patients  with  VHL-associated  ccRCC,  which  were  presented  at  the  2020  ASCO  Annual  Meeting.
Additionally, Phase 2 data showing anti-tumor responses in VHL disease patients with ccRCC and other tumors were presented at the  ESMO Virtual Congress
2020.

In  February  2021,  Merck  and  Eisai  began  a  Phase  3  trial  examining  Lenvima  in  combination  with  belzutifan  in  previously  treated  patients  with

metastatic RCC.

MK-7119, Tukysa, is a small molecule tyrosine kinase inhibitor, for the treatment of HER2-positive cancers. In September 2020, Seagen granted Merck
an  exclusive  license  and  entered  into  a  co-development  agreement  with  Merck  to  accelerate  the  global  reach  of  Tukysa.  Merck  and  Seagen  also  announced  a
collaboration  to  globally  develop  and  commercialize  Seagen’s  ladiratuzumab  vedotin  (MK-6440),  an  investigational  antibody-drug  conjugate  targeting  LIV-1,
which is currently in Phase 2 clinical trials for breast cancer and other solid tumors. The collaboration will pursue a broad joint development program evaluating
ladiratuzumab  vedotin  as  monotherapy  and  in  combination  with  Keytruda in  TNBC,  hormone  receptor-positive  breast  cancer  and  other  LIV-1-expressing  solid
tumors.

MK-7339, Lynparza, is an oral PARP inhibitor currently approved for certain types of advanced ovarian, breast, pancreatic and prostate cancers being

co-developed for multiple cancer types as part of a collaboration with AstraZeneca.

MK-7264,  gefapixant,  is  an  investigational,  orally  administered,  selective  P2X3  receptor  antagonist,  for  the  treatment  of  refractory  or  unexplained
chronic cough. In September 2020, Merck announced the results from two ongoing pivotal Phase 3 trials (COUGH-1 and COUGH-2) evaluating the efficacy and
safety of gefapixant. In these studies, adult patients treated with gefapixant 45 mg twice daily demonstrated a statistically significant reduction in 24-hour cough
frequency versus placebo at 12 weeks (COUGH-1) and 24 weeks (COUGH-2). The gefapixant 15 mg twice daily treatment arms did not meet the primary efficacy
endpoint in either Phase 3 study. These results were presented at the Virtual European Respiratory Society International Congress 2020. Merck plans to share data
from COUGH-1 and COUGH-2 with regulatory authorities worldwide.

MK-7110  (also  known  as  CD24Fc)  is  an  investigational  treatment  for  patients  hospitalized  with  COVID-19.  Merck  obtained  MK-7110  through  the
acquisition of OncoImmune. In September 2020, OncoImmune reported topline findings from an interim efficacy analysis of a Phase 3 study evaluating MK-7110.
An  interim  analysis  of  data  from  203  participants  (75%  of  the  planned  enrollment)  indicated  that  selected  hospitalized  patients  with  COVID-19  treated  with  a
single dose of MK-7110 showed a 60% higher probability of improvement in clinical status compared to placebo, as defined by the protocol. The risk of death or
respiratory failure was reduced by more than 50%. Full results from this Phase 3 study, which were consistent with the topline results, were received in February
2021 and will be submitted for publication in the future. MK-7110 is also being studied in a Phase 3 trial for the treatment of graft versus host disease.

Molnupiravir (also known as MK-4482) is an orally available antiviral candidate for the treatment of COVID-19 being developed in collaboration with

Ridgeback Biotherapeutics LP. It is currently being evaluated in

21

Table of Contents

Phase 2/3 clinical trials in both the hospital and outpatient settings. The primary completion date for the Phase 2/3 studies is June 2021. The Company anticipates
interim efficacy data in the first quarter of 2021.

MK-8591A  is  a  combination  of  islatravir,  the  company’s  investigational  oral  nucleoside  reverse  transcriptase  translocation  inhibitor  (NRTTI),  and
doravirine  (Pifeltro)  being  evaluated  for  the  treatment  of  HIV-1  infection.  In  October  2020,  Merck  announced  Week  96  data  from  the  Phase  2b  trial
(NCT03272347)  evaluating  the  efficacy  and  safety  of  MK-8591A  in  treatment-naïve  adults  with  HIV-1  infection.  Week  96  findings  demonstrated  that  the
combination  of  islatravir  and  doravirine  maintained  virologic  suppression  similar  to  Delstrigo (doravirine/lamivudine/tenofovir  disoproxil  fumarate),  and  the
findings were consistent with Week 48 results. Additional Week 96 data from the study show low rates of participants meeting the definition of protocol-defined
virologic  failure  in  both the  islatravir  plus doravirine  and the  Delstrigo treatment  arms,  and  no  participants  in  either  arm  met  the  criteria  for  resistance  testing.
These data were presented at the virtual 2020 International Congress on Drug Therapy in HIV Infection (HIV Glasgow).

In November 2020, Merck announced a collaboration with the Bill & Melinda Gates Foundation (the foundation) where the foundation is committing to
provide funding to support a pivotal Phase 3 study investigating a once-monthly oral pre-exposure prophylaxis (PrEP) option in women and adolescent girls at high
risk  for  acquiring  HIV-1  infection  in  sub-Saharan  Africa.  The  study,  IMPOWER  22,  will  evaluate  the  efficacy  and  safety  of  once-monthly  islatravir  and  is
anticipated to begin in early 2021. Merck will be funding the IMPOWER 22 clinical trial in the United States. Merck also plans to conduct additional studies in
HIV prevention with islatravir in once-monthly oral PrEP. These studies will include IMPOWER 24, a global Phase 3 clinical trial to evaluate islatravir as a once-
monthly  oral  agent  for  PrEP  at  sites  across  the  world  and  among  other  key  populations  impacted  by  the  epidemic,  including  men  who  have  sex  with  men  and
transgender women.

In  January  2021,  the  FDA  accepted  for  standard  review  a  supplemental  NDA  for  Steglatro  (ertugliflozin)  to  incorporate  the  results  of  the  Phase  3
VERTIS cardiovascular (CV) outcomes trial in the product labeling. The VERTIS CV trial evaluated Steglatro, an oral sodium-glucose cotransporter 2 (SGLT2)
inhibitor,  versus  placebo,  added  to  background  standard  of  care  treatment,  in  patients  with  type  2  diabetes  and  atherosclerotic  CV  disease.  The  study  met  the
primary endpoint of non-inferiority on major adverse CV events (MACE), which is a composite of CV death, nonfatal myocardial infarction or nonfatal stroke,
compared  to placebo. The key secondary  endpoints of superiority  for Steglatro versus placebo for time to the first occurrence  of the composite  of CV death or
hospitalization for heart failure, time to CV death alone and time to the first occurrence of the composite of renal death, dialysis/transplant or doubling of serum
creatinine from baseline were not met. While not a pre-specified hypothesis for statistical testing, a reduction in hospitalization for heart failure was observed with
Steglatro. A supplemental application was also submitted to the EMA and is currently under review.

In January 2021, the Company announced the discontinuation of the clinical development programs for its COVID-19 vaccine candidates, V590 and
V591, following Merck’s review of findings from Phase 1 clinical studies for the vaccines. In these studies, both V590 and V591 were generally well tolerated, but
the immune responses were inferior to those seen following natural infection and those reported for other SARS-CoV-2/COVID-19 vaccines.

The chart below reflects the Company’s research pipeline as of February 22, 2021. Candidates shown in Phase 3 include specific products and the date
such  candidate  entered  into  Phase  3  development.  Candidates  shown  in  Phase  2  include  the  most  advanced  compound  with  a  specific  mechanism  or,  if  listed
compounds have the same mechanism, they are each currently intended for commercialization in a given therapeutic area. Small molecules and biologics are given
MK-number designations and vaccine candidates are given V-number designations. Except as otherwise noted, candidates in Phase 1, additional indications in the
same therapeutic area (other than with respect to cancer) and additional claims, line extensions or formulations for in-line products are not shown.

22

Phase 3 (Phase 3 entry date)

Under Review

Cancer

MK-3475 Keytruda

Biliary Tract (September 2019)
Cervical (October 2018) (EU)
Cutaneous Squamous Cell (August 2019) (EU)
Endometrial (August 2019) (EU)
Gastric (May 2015) (EU)
Hepatocellular (May 2016) (EU)
Mesothelioma (May 2018)
Ovarian (December 2018)
Prostate (May 2019)
Small-Cell Lung (May 2017) (EU)

MK-6482 (belzutifan)

Renal Cell (February 2020)

MK-7119 Tukysa

(1)

Breast (October 2019)

MK-7902 Lenvima

MK-7339 Lynparza

(1)(2)
 (August 2020)

(1)

(2) 

Colorectal
Non-Small-Cell Lung (June 2019)
Small-Cell Lung  (December 2020)
(2)
(1)(2)
Bladder (May 2019)
Endometrial (June 2018) (EU)
Gastric (December 2020)
Head and Neck (February 2020)
Melanoma (March 2019)
Non-Small-Cell Lung (March 2019)

Cough

MK-7264 (gefapixant) (March 2018)

COVID-19

MK-7110 (December 2020)

HIV-1 Infection
     MK-8591A (doravirine/islatravir) (February 2020)

New Molecular Entities/Vaccines
Bacterial Infection

MK-7655A (relebactam+imipenem/cilastatin) (JPN)

Heart Failure

MK-1242 (vericiguat)

 (EU) (JPN)
Pediatric Neurofibromatosis Type 1

(1)

MK-5618 (selumetinib)
Pneumococcal Infection Adult

 (EU)

(1)

V-114 (U.S.) (EU)

Certain Supplemental Filings
Cancer

MK-3475 Keytruda
• Metastatic Triple-Negative Breast Cancer
         (KEYNOTE-355) (EU) (JPN)
• Early-Stage Triple-Negative Breast Cancer
         (KEYNOTE-522) (U.S.)
• Refractory Classical Hodgkin Lymphoma
         (KEYNOTE-204) (EU)
• Unresectable or Metastatic MSI-H or dMMR Colorectal Cancer

(KEYNOTE-177) (JPN)
• Cutaneous Squamous Cell Cancer
         (KEYNOTE-629) (U.S.)
• Advanced Unresectable Metastatic
         Esophageal Cancer (KEYNOTE-590)
         (U.S.) (EU) (JPN)
• First-Line Metastatic HER2+ Gastric Cancer
         (KEYNOTE-811) (U.S.)

MK-7902 Lenvima
• First-Line Metastatic Hepatocellular Carcinoma

(1)

(KEYNOTE-524) (U.S.)

(2)(4)

• Thymic Carcinoma (NCCH1508/REMORA) (JPN)

Footnotes:

(1)

 Being developed in a collaboration.

(2)

 Being developed in combination with Keytruda.

(3)

 Being developed as monotherapy and in combination with Keytruda.

(4)

 In July 2020, the FDA issued a CRL for Merck’s and Eisai’s applications.

Merck and Eisai intend to submit additional data when available to the FDA.

Table of Contents

Phase 2

Antiviral COVID-19

MK-4482 (molnupiravir)

(1)

Cancer

MK-1026
     Hematological Malignancies
MK-1308 (quavonlimab)

(2)

Melanoma
Non-Small-Cell Lung
Solid Tumors
(2)
Head and Neck

MK-1454

MK-2140

Advanced Solid Tumors

MK-3475 Keytruda

Advanced Solid Tumors

(2)

MK-4280
     Hematological Malignancies
     Non-Small-Cell Lung
MK-4830

Non-Small-Cell Lung

(2)

MK-5890
     Non-Small-Cell Lung
MK-6440 (ladiratuzumab vedotin)

(1)(3)

Advanced Solid Tumors
Breast

MK-7119 Tukysa

(1)

Advanced Solid Tumors
Colorectal
Gastric

MK-7339 Lynparza

(1)(3)

Advanced Solid Tumors
(2)

MK-7684 (vibostolimab)

Melanoma
Non-Small-Cell Lung

MK-7902 Lenvima

(1)(2)

Advanced Solid Tumors
Biliary Tract
Colorectal
Glioblastoma

V937

Breast
Cutaneous Squamous Cell
Head and Neck
Melanoma
Solid Tumors
Chikungunya virus

V184

Cytomegalovirus

V160

HIV-1 Prevention

MK-8591 (islatravir)

Nonalcoholic Steatohepatitis NASH

MK-3655

Overgrowth Syndrome

MK-7075 (miransertib)
Pneumococcal Vaccine Adult

V116

Respiratory Syncytial Virus

MK-1654
Schizophrenia
MK-8189

Human Capital

As of December 31, 2020, the Company had approximately 74,000 employees worldwide, with approximately 27,000 employed in the United States,
including Puerto Rico, and approximately  26,000 third-party  contractors globally. Approximately 73,000 of the Company’s employees  are full time-employees.
Women and individuals with ethnically diverse backgrounds comprise approximately 50% and 31% of its workforce in the United States, respectively. Women
comprise 46% of the members of the Board of Directors. Additionally, the Company’s executive team, which includes individuals up to two structural levels below
the Chief Executive

23

Table of Contents

Officer, is made up of 34% women. Approximately 30% of the Company’s employees are represented by various collective bargaining groups.

The  Company  recognizes  that  its  employees  are  critical  to  meet  the  needs  of  its  patients  and  customers  and  that  its  ability  to  excel  depends  on  the

integrity, skill, and diversity of its employees.

Talent Acquisition

The Company uses a comprehensive approach to ensure recruiting, retention and leadership development goals are systematically executed throughout
the Company and that  it hires talented  leaders  to achieve  improved  gender  parity  and representation  across  all dimensions  of diversity.  The Company provides
training to its managers and external recruiting organizations on strategies to mitigate unconscious bias in the candidate selection and hiring process. In addition,
the  Company  utilizes  a  comprehensive  communications  strategy,  marketing  outreach,  social  media  and  strategic  alliance  partnerships  to  reach  a  broad  pool  of
talent  in  its  critical  business  areas.  In  2020,  the  Company  hired  approximately  10,000  employees  across  the  globe  through  various  channels  including  the
Company’s external career site, diversity partnerships, employee referrals, universities and other external sources.

Global Diversity and Inclusion

Diversity and inclusion are fundamental to the Company’s success and core to future innovation. The Company fosters a globally diverse and inclusive
workforce for its employees by creating an environment of belonging, engagement, equity, and empowerment. The Company is proactive and intentional about
diversity  hiring  and  development  programs  to  advance  talent.  The  Company  creates  competitive  advantages  by  leveraging  diversity  and  inclusion  to  accelerate
business performance. This includes fostering global supplier diversity, integrating diversity and inclusion into the Company’s commercialization strategies and
leveraging  employee  insights  to  improve  performance.  In  addition  to  these  efforts,  the  Company  has  ten  Employee  Business  Resource  Groups,  that  provide
opportunities  for employees  to take  an active  part  in contributing  to the Company’s inclusive  culture  through their work in talent  acquisition  and development,
business and customer insights and social and community outreach.

(1)

(2)

Gender and Ethnicity Performance Data
Women in the workforce
Women in the workforce in the U.S.
Women on the Board of Directors
Women in executive roles
Women in management roles
Members of underrepresented ethnic groups on the Board of Directors
Members of underrepresented ethnic groups in executive roles (U.S.)
Members of underrepresented ethnic groups in the workforce (U.S.)
Members of underrepresented ethnic groups in management roles (U.S.)
New hires that were female
New hires that were members of underrepresented ethnic groups (U.S.)

(3)

NR: Not reported.

2020
49%
50%
46%
34%
43%
23%
22%
31%
29%
50%
42%

2019
49%
50%
33%
36%
43%
17%
26%
29%
27%
50%
33%

2018
49%
NR
23%
32%
41%
15%
21%
27%
25%
51%
36%

(1)

(2)

(3)

 As of 12/31.
 “Executive” is defined as the chief executive officer and two structural levels below.
 “Management role” is defined as all managers with direct reports other than executives defined in note 2.

Compensation and Benefits

The  Company  provides  a  valuable  total  rewards  package  reflecting  its  commitment  to  attract,  retain  and  motivate  its  talent,  and  to  supporting  its
employees  and  their  families  in  every  stage  of  life.  The  Company  continuously  monitors  and  adjusts  its  compensation  and  benefit  programs  to  ensure  they  are
competitive, contemporary, helpful and engaging, and that they support strategic imperatives such as diversity and inclusion, equity, flexibility, quality, security
and  affordability.  For  example,  in  2020,  the  Company  added  a  personal  health  care  concierge  service  to  assist  U.S.  employees  participating  in  the  Company
medical plan with their health care

24

Table of Contents

needs. Aligned with its business and in support of its cancer care strategy, the Company also improved cancer screening benefits, added resources and provided
immediate  access  to  a  leading  cancer  center  of  excellence  for  U.S.  employees.  Globally,  the  Company  implemented  a  minimum  standard  of  12  weeks  of  paid
parental leave, which inclusively applies to all parents. In the United States, the Company’s benefits rank in the top quartile of Fortune 100 companies under the
Aon Hewitt 2019 Benefits Index. The Company has been included in the Working Mother 100 Best Companies ranking for 34 consecutive years and was named a
Working Mother Best Company for Dads in 2020.

Employee Wellbeing

The Company is committed to helping its employees and their families improve their own health and wellbeing. The Company’s culture of wellbeing is
referred to as “Live it”, which includes programs to support preventive health, emotional and financial wellbeing, physical fitness and nutrition. It is designed to
inspire all employees to pursue, enjoy, and share healthy lifestyles. Live it was launched in the United States in 2011 and today is available in every country in
which  the  Company  has  employees.  In  addition,  many  of  the  Company’s  larger  sites  offer  onsite  health  clinics  that  provide  an  array  of  services  to  help  its
employees  stay  or  get  well,  including  vaccinations,  cancer  and  biometric  screenings,  travel  medicine  and  advice,  diagnosis  and  treatment  of  non-occupational
illnesses or injuries, health counseling and referrals. The Company’s overall employee wellbeing program was recognized for excellence in health and wellbeing by
receiving the highest-level awards from the Business Group on Health (2019 and 2020), and the American Heart Association (2018-2020).

COVID-19 Response

The  Company  recognizes  that  it  has  a  unique  responsibility  to  help  in  response  to  the  COVID-19  pandemic  and  is  committed  to  supporting  and
protecting  its  employees  and  their  families,  ensuring  that  its  supply  of  medicines  and  vaccines  reaches  its  patients,  contributing  its  scientific  expertise  to  the
development  of  antiviral  approaches  and  supporting  its  health  care  providers  and  the  communities  in  which  they  serve.  The  Company  continues  to  provide
employees with easy and regular access to information, including details regarding the Company’s tracking process, guidance around hygiene measures and travel
and best practices for working from home. Examples of pandemic support resources and programs available to the Company’s employees include pay continuation
for  workers  who  have  been  sick  or  exposed,  volunteer  policy  adjustment  to  enable  employees  with  medical  backgrounds  to  volunteer  in  SARS-CoV-2-related
activities,  resources  to  prioritize  physical  and  mental  wellness,  adjustments  to  medical  plans  to  cover  100%  of  a  COVID-19-related  diagnosis,  testing  and
treatment, backup childcare and more.

Engaging Employees

The Company strives to foster employee engagement by promoting a safe, positive, diverse and inclusive work environment that provides numerous
opportunities for two-way communication with employees. Some of the Company’s key programs and initiatives include promoting global employee engagement
surveys,  ongoing  pulse  checks  to  the  organization  for  interim  feedback  on  specific  topics,  fostering  professional  networking  and  collaboration,  identifying  and
providing opportunities for volunteering and establishing positive, cooperative business relations with designated employee representatives.

Talent Management and Development

As  the  Company  pursues  its  goal  of  becoming  the  world’s  premier  research-based  biopharmaceutical  company,  it  needs  to  continuously  develop  its
diverse  and  talented  people.  The  Company’s  current  talent  management  system  supports  company-wide  performance  management,  development,  talent  reviews
and  succession  planning.  Annual  performance  reviews  help  further  the  professional  development  of  the  Company’s  employees  and  ensure  that  the  Company’s
workforce  is  aligned  with  the  Company’s  objectives.  The  Company  seeks  to  continuously  build  the  skills  and  capabilities  of  its  workforce  to  accelerate  talent,
improve performance and mitigate risk through relevant continuous learning experiences. This includes, but is not limited to, building leadership and management
skills, as well as providing technical and functional training to all employees.

Environmental Matters

The Company believes that there are no compliance issues associated with applicable environmental laws and regulations that would have a material
adverse  effect  on  the  Company.  The  Company  is  also  remediating  environmental  contamination  resulting  from  past  industrial  activity  at  certain  of  its  sites.
Expenditures for

25

Table of Contents

remediation  and  environmental  liabilities  were  $11  million  in  2020  and  are  estimated  at  $46  million  in  the  aggregate  for  the  years  2021  through  2025.  These
amounts  do  not  consider  potential  recoveries  from  other  parties.  The  Company  has  taken  an  active  role  in  identifying  and  accruing  for  these  costs  and,  in
management’s opinion, the liabilities for all environmental matters that are probable and reasonably estimable have been accrued and totaled $67 million at both
December 31, 2020 and 2019. Although it is not possible to predict with certainty the outcome of these matters, or the ultimate costs of remediation, management
does not believe that any reasonably possible expenditures that may be incurred in excess of the liabilities accrued should exceed approximately $65 million in the
aggregate.  Management  also  does  not  believe  that  these  expenditures  should  have  a  material  adverse  effect  on  the  Company’s  financial  condition,  results  of
operations, liquidity or capital resources for any year.

Merck believes that climate change could present risks to its business. Some of the potential impacts of climate change to its business include increased
operating costs due to additional regulatory requirements, physical risks to the Company’s facilities, water limitations and disruptions to its supply chain. These
potential risks are integrated into the Company’s business planning including investment in reducing energy usage, water use and greenhouse gas emissions. The
Company does not believe these risks are material to its business at this time.

Geographic Area Information

The Company’s operations outside the United States are conducted primarily through subsidiaries. Sales worldwide by subsidiaries outside the United

States as a percentage of total Company sales were 56% in both 2020 and 2019 and were 57% in 2018.

The Company’s worldwide business is subject to risks of currency fluctuations, governmental actions and other governmental proceedings abroad. The
Company does not regard these risks as a deterrent to further expansion of its operations abroad. However, the Company closely reviews its methods of operations
and adopts strategies responsive to changing economic and political conditions.

Merck has operations in countries located in Latin America, the Middle East, Africa, Eastern Europe and Asia Pacific. Business in these developing

areas, while sometimes less stable, offers important opportunities for growth over time.

Available Information

The Company’s Internet website address is www.merck.com. The Company will make available, free of charge at the “Investors” portion of its website,
its Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and all amendments to those reports filed or furnished pursuant
to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, as soon as reasonably practicable after such reports are electronically filed with, or
furnished to, the U.S. Securities and Exchange Commission (SEC). The address of that website is www.sec.gov. In addition, the Company will provide without
charge a copy of its Annual Report on Form 10-K, including financial statements and schedules, upon the written request of any shareholder to the Office of the
Secretary, Merck & Co., Inc., 2000 Galloping Hill Road, K1-4157, Kenilworth, NJ 07033 U.S.A.

The Company’s corporate governance guidelines and the charters of the Board of Directors’ four standing committees are available on the Company’s

website at www.merck.com/company-overview/leadership and all such information is available in print to any shareholder who requests it from the Company.

Item 1A.

Risk Factors.

Summary Risk Factors

The Company is subject to a number of risks that if realized could materially adversely affect its business, results of operations, cash flow, financial

condition or prospects. The following is a summary of the principal risk factors facing the Company:

•

•

The Company is dependent on its patent rights, and if its patent rights are invalidated or circumvented, its business could be materially adversely
affected.

As the Company’s products lose market exclusivity, the Company generally experiences a significant and rapid loss of sales from those products.

26

Table of Contents

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

Key  products  generate  a  significant  amount  of  the  Company’s  profits  and  cash  flows,  and  any  events  that  adversely  affect  the  markets  for  its
leading products could have a material adverse effect on the Company’s results of operations and financial condition.

The Company’s research and development efforts may not succeed in developing commercially successful products and the Company may not be
able  to  acquire  commercially  successful  products  in  other  ways;  in  consequence,  the  Company  may  not  be  able  to  replace  sales  of  successful
products that lose patent protection.

The Company’s success is dependent on the successful development and marketing of new products, which are subject to substantial risks.

The Company faces continued pricing pressure with respect to its products.

The uncertainty in global economic conditions together with cost-reduction measures being taken by certain governments could negatively affect
the Company’s operating results.

The Company faces intense competition from lower cost generic products.

The Company faces intense competition from competitors’ products.

The global COVID-19 pandemic is having an adverse impact on the Company’s business, operations and financial performance. The Company is
unable to predict the full extent to which the COVID-19 pandemic or any future pandemic, epidemic or similar public health threat will adversely
impact its business, operations, financial performance, results of operations, and financial condition.

The Company has significant global operations, which expose it to additional risks, and any adverse event could have a material adverse effect on
the Company’s results of operations and financial condition.

Failure to attract and retain highly qualified personnel could affect the Company’s ability to successfully develop and commercialize products.

In the past, the Company has experienced difficulties and delays in manufacturing certain of its products, including vaccines.

The Company may not be able to realize the expected benefits of its investments in emerging markets.

The Company is exposed to market risk from fluctuations in currency exchange rates and interest rates.

Pharmaceutical products can develop unexpected safety or efficacy concerns.

Reliance on third-party relationships and outsourcing arrangements could materially adversely affect the Company’s business.

Negative events in the animal health industry could have a material adverse effect on future results of operations and financial condition.

Biologics  and  vaccines  carry  unique  risks  and  uncertainties,  which  could  have  a  material  adverse  effect  on  the  Company’s  future  results  of
operations and financial condition.

The health care industry in the United States has been, and will continue to be, subject to increasing regulation and political action.

The Company’s products, including products in development, cannot be marketed unless the Company obtains and maintains regulatory approval.

Developments following regulatory approval may adversely affect sales of the Company’s products.

The Company is subject to a variety of U.S. and international laws and regulations.

27

Table of Contents

•

•

•

•

•

•

•

•

The  Company  is  subject  to  evolving  and  complex  tax  laws,  which  may  result  in  additional  liabilities  that  may  affect  results  of  operations  and
financial condition.

Product liability insurance for products may be limited, cost prohibitive or unavailable.

The Company is increasingly dependent on sophisticated software applications, computing infrastructure and cloud service providers. In 2017, the
Company  experienced  a  network  cyber-attack  that  led  to  a  disruption  of  its  worldwide  operations,  including  manufacturing,  research  and  sales
operations. The Company could be a target of future cyber-attacks.

Social media platforms present risks and challenges.

The  proposed  Spin-Off  of  Organon  may  not  be  completed  on  the  terms  or  timeline  currently  contemplated,  if  at  all,  and  may  not  achieve  the
expected results.

The costs to complete the proposed Spin-Off will be significant. In addition, the Company may be unable to achieve some or all of the strategic and
financial benefits that it expects to achieve from the Spin-Off of Organon.

Following the Spin-Off, the price of shares of the Company’s common stock may fluctuate significantly.

There could be significant income tax liability if the Spin-Off or certain related transactions are determined to be taxable for U.S. federal income
tax purposes.

The above list is not exhaustive, and the Company faces additional challenges and risks. Investors should carefully consider all of the information set

forth in this Form 10-K, including the following risk factors, before deciding to invest in any of the Company’s securities.

Risk Factors

The risks below are not the only ones the Company faces. Additional risks not currently known to the Company or that the Company presently deems
immaterial may also impair its business operations. The Company’s business, financial condition, results of operations, cash flow or prospects could be materially
adversely  affected  by  any  of  these  risks.  This  Form  10-K  also  contains  forward-looking  statements  that  involve  risks  and  uncertainties.  The  Company’s  results
could materially differ from those anticipated in these forward-looking statements as a result of certain factors, including the risks it faces described below and
elsewhere. See “Cautionary Factors that May Affect Future Results” below.

Risks Related to the Company’s Business

The  Company  is  dependent  on  its  patent  rights,  and  if  its  patent  rights  are  invalidated  or  circumvented,  its  business  could  be  materially

adversely affected.

Patent protection is considered, in the aggregate, to be of material importance to the Company’s marketing of human health and animal health products
in the United States and in most major foreign markets. Patents covering products that it has introduced normally provide market exclusivity, which is important
for the successful marketing and sale of its products. The Company seeks patents covering each of its products in each of the markets where it intends to sell the
products and where meaningful patent protection is available.

Even if the Company succeeds in obtaining patents covering its products, third parties or government authorities may challenge or seek to invalidate or
circumvent its patents and patent applications. It is important for the Company’s business to defend successfully the patent rights that provide market exclusivity
for  its  products.  The  Company  is  often  involved  in  patent  disputes  relating  to  challenges  to  its  patents  or  claims  by  third  parties  of  infringement  against  the
Company. The Company defends its patents both within and outside the United States, including by filing claims of infringement against other parties. See Item 8.
“Financial  Statements  and  Supplementary  Data,”  Note  10.  “Contingencies  and  Environmental  Liabilities”  below.  In  particular,  manufacturers  of  generic
pharmaceutical products from time to time file abbreviated NDAs with the FDA seeking to market generic forms of the Company’s products prior to the expiration
of relevant patents owned or licensed by the Company. The Company normally responds by defending its patent, including by filing lawsuits alleging patent

28

Table of Contents

infringement. Patent litigation and other challenges to the Company’s patents are costly and unpredictable and may deprive the Company of market exclusivity for
a patented product or, in some cases, third-party patents may prevent the Company from marketing and selling a product in a particular geographic area.

Additionally, certain foreign governments have indicated that compulsory licenses to patents may be granted in the case of national emergencies or in
other circumstances, which could diminish or eliminate sales and profits from those regions and negatively affect the Company’s results of operations. Further,
court  decisions  relating  to  other  companies’  patents,  potential  legislation  in  both  the  United  States  and  certain  foreign  markets  relating  to  patents,  as  well  as
regulatory initiatives may result in a more general weakening of intellectual property protection.

If one or more important products lose patent protection in profitable markets, sales of those products are likely to decline significantly as a result of
generic  versions  of  those  products  becoming  available.  The  Company’s  results  of  operations  may  be  adversely  affected  by  the  lost  sales  unless  and  until  the
Company has launched commercially  successful products that replace the lost sales. In addition, if products that were measured at fair value and capitalized  in
connection  with  acquisitions  experience  difficulties  in  the  market  that  negatively  affect  product  cash  flows,  the  Company  may  recognize  material  non-cash
impairment charges with respect to the value of those products.

A  chart  listing  the  patent  protection  for  certain  of  the  Company’s  marketed  products,  and  U.S.  patent  protection  for  candidates  in  Phase  3  clinical

development is set forth above in Item 1. “Business — Patents, Trademarks and Licenses.”

As  the  Company’s  products  lose  market  exclusivity,  the  Company  generally  experiences  a  significant  and  rapid  loss  of  sales  from  those

products.

The Company depends upon patents to provide it with exclusive marketing rights for its products for some period of time. Loss of patent protection for
one  of  the  Company’s  products  typically  leads  to  a  significant  and  rapid  loss  of  sales  for  that  product  as  lower  priced  generic  versions  of  that  drug  become
available.  In  the  case  of  products  that  contribute  significantly  to  the  Company’s  sales,  the  loss  of  market  exclusivity  can  have  a  material  adverse  effect  on  the
Company’s  business,  cash  flow,  results  of  operations,  financial  condition  and  prospects.  For  example,  the  patent  that  provided  U.S.  market  exclusivity  for
NuvaRing expired in April 2018 and generic competition began in December 2019. The Company experienced a rapid and substantial decline in U.S.  NuvaRing
sales in 2020 as a result of this generic competition. In addition, Januvia and Janumet will lose market exclusivity in the United States in January 2023.  Januvia
will lose market exclusivity in the EU in September 2022. Finally, the SPC that provides market exclusivity for  Janumet in the  EU expires  in April  2023.  The
Company anticipates sales of Januvia and Janumet in these markets will decline substantially after the loss of market exclusivity.

Key products generate a significant amount of the Company’s profits and cash flows, and any events that adversely affect the markets for its

leading products could have a material adverse effect on the Company’s results of operations and financial condition.

The Company’s ability to generate profits and operating cash flow depends largely upon the continued profitability of the Company’s key products,
such as Keytruda, Gardasil/Gardasil 9, Januvia, Janumet, and Bridion. In particular, in 2020, the Company’s oncology portfolio, led by Keytruda, represented the
vast majority of the Company’s revenue growth. As a result of the Company’s dependence on key products, any event that adversely affects any of these products
or the markets for any of these products could have a significant adverse impact on results of operations and cash flows. These events could include loss of patent
protection,  increased  costs  associated  with  manufacturing,  generic  or  over-the-counter  availability  of  the  Company’s  product  or  a  competitive  product,  the
discovery of previously unknown side effects, results of post-approval trials, increased competition from the introduction of new, more effective treatments and
discontinuation or removal from the market of the product for any reason. Such events could have a material adverse effect on the sales of any such products.

29

Table of Contents

The Company’s research and development efforts may not succeed in developing commercially successful products and the Company may not
be able to acquire commercially successful products in other ways; in consequence, the Company may not be able to replace sales of successful products
that lose patent protection.

In order to remain competitive, the Company, like other major pharmaceutical companies, must continue to launch new products. Expected declines in
sales of products after the loss of market exclusivity mean that the Company’s future success is dependent on its pipeline of new products, including new products
that it may develop through collaborations and joint ventures and products that it is able to obtain through license or acquisition. To accomplish this, the Company
commits substantial effort, funds and other resources to research and development, both through its own dedicated resources and through various collaborations
with third parties. There is a high rate of failure inherent in the research and development process for new drugs and vaccines. As a result, there is a high risk that
funds invested by the Company in research programs will not generate financial returns. This risk profile is compounded by the fact that this research has a long
investment cycle. To bring a pharmaceutical compound from the discovery phase to market may take a decade or more and failure can occur at any point in the
process, including later in the process after significant funds have been invested.

For a description of the research and development process, see Item 1. “Business — Research and Development” above. Each phase of testing is highly
regulated and during each phase there is a substantial risk that the Company will encounter serious obstacles or will not achieve its goals. Therefore, the Company
may abandon a product in which it has invested substantial amounts of time and resources. Some of the risks encountered in the research and development process
include the following: pre-clinical testing of a new compound may yield disappointing results; competing products from other manufacturers may reach the market
first; clinical trials of a new drug may not be successful; a new drug may not be effective or may have harmful side effects; a new drug may not be approved by the
regulators for its intended use; it may not be possible to obtain a patent for a new drug; payers may refuse to cover or reimburse the new product; or sales of a new
product may be disappointing.

The Company cannot state with certainty when or whether any of its products now under development will be approved or launched; whether it will be
able to develop, license or otherwise acquire compounds, product candidates or products; or whether any products, once launched, will be commercially successful.
The  Company  must  maintain  a  continuous  flow  of  successful  new  products  and  successful  new  indications  for  existing  products  sufficient  both  to  cover  its
substantial research and development costs and to replace sales that are lost as profitable products lose market exclusivity or are displaced by competing products
or  therapies.  Failure  to  do so  in  the  short  term  or  long  term  would have  a  material  adverse  effect  on the  Company’s  business,  results  of  operations,  cash  flow,
financial condition and prospects.

The Company’s success is dependent on the successful development and marketing of new products, which are subject to substantial risks.

Products that appear promising in development may fail to reach the market or fail to succeed for numerous reasons, including the following:

•

•

•

•

•

findings of ineffectiveness, superior safety or efficacy of competing products, or harmful side effects in clinical or pre-clinical testing;

failure  to  receive  the  necessary  regulatory  approvals,  including  delays  in  the  approval  of  new  products  and  new  indications,  or  the  anticipated
labeling, and uncertainties about the time required to obtain regulatory approvals and the benefit/risk standards applied by regulatory agencies in
determining whether to grant approvals;

failure in certain markets to obtain reimbursement commensurate with the level of innovation and clinical benefit presented by the product;

lack of economic feasibility due to manufacturing costs or other factors; and

preclusion from commercialization by the proprietary rights of others.

30

Table of Contents

In the future, if certain pipeline programs are cancelled or if the Company believes that their commercial prospects have been reduced, the Company
may recognize material non-cash impairment charges for those programs that were measured at fair value and capitalized in connection with acquisitions or certain
collaborations.

Failure  to  successfully  develop  and  market  new  products  in  the  short  term  or  long  term  would  have  a  material  adverse  effect  on  the  Company’s

business, results of operations, cash flow, financial condition and prospects.

The Company faces continued pricing pressure with respect to its products.

The Company faces continued pricing pressure globally and, particularly in mature markets, from managed care organizations, government agencies
and programs that could negatively affect the Company’s sales and profit margins. In the United States, these include (i) practices of managed care groups and
institutional  and  governmental  purchasers,  (ii)  U.S.  federal  laws  and  regulations  related  to  Medicare  and  Medicaid,  including  the  Medicare  Prescription  Drug
Improvement and Modernization Act of 2003 and the ACA, and (iii) state activities aimed at increasing price transparency, including new laws as noted above in
Item 1. “Competition and the Health Care Environment.” Changes to the health care system enacted as part of health care reform in the United States, as well as
increased purchasing power of entities that negotiate on behalf of Medicare, Medicaid, and private sector beneficiaries, could result in further pricing pressures. In
addition, in the United States, larger customers have received higher rebates on drugs in certain highly competitive categories. The Company must also compete to
be placed on formularies of managed care organizations. Exclusion of a product from a formulary can lead to reduced usage in the managed care organization.

In order to provide information about the Company’s pricing practices, the Company annually posts on its website its Pricing Transparency Report for
the United States. The report provides the Company’s average annual list price and net price increases across the Company’s U.S. portfolio dating back to 2010. In
2020, the Company’s gross U.S. sales were reduced by 45.5% as a result of rebates, discounts and returns.

Outside the United States, numerous major markets, including the EU, Japan and China have pervasive government involvement in funding health care
and,  in  that  regard,  fix  the  pricing  and  reimbursement  of  pharmaceutical  and  vaccine  products.  Consequently,  in  those  markets,  the  Company  is  subject  to
government decision making and budgetary actions with respect to its products. In Japan, the pharmaceutical industry is subject to government-mandated biennial
price reductions of pharmaceutical products and certain vaccines. Furthermore, the government can order re-pricing for specific products if it determines that use of
such product will exceed certain thresholds defined under applicable re-pricing rules. The next government-mandated price reduction will occur in April 2021 and
is expected to impact many Company products.

The Company expects pricing pressures to continue in the future.

The  uncertainty  in  global  economic  conditions  together  with  cost-reduction  measures  being  taken  by  certain  governments  could  negatively

affect the Company’s operating results.

Uncertainty in global economic and geopolitical conditions may result in a slowdown to the global economy that could affect the Company’s business
by reducing the prices that drug wholesalers and retailers, hospitals, government agencies and managed health care providers may be able or willing to pay for the
Company’s products or by reducing the demand for the Company’s products, which could in turn negatively impact the Company’s sales and result in a material
adverse effect on the Company’s business, cash flow, results of operations, financial condition and prospects.

As discussed above in “Competition and the Health Care Environment,” global efforts toward health care cost containment continue to exert pressure
on product pricing and market access worldwide. Changes to the U.S. health care system as part of health care reform, as well as increased purchasing power of
entities  that  negotiate  on  behalf  of  Medicare,  Medicaid,  and  private  sector  beneficiaries,  have  contributed  to  pricing  pressure.  In  several  international  markets,
government-mandated pricing actions have reduced prices of generic and patented drugs. In addition, the Company’s revenue performance in 2020 was negatively
affected by other cost-reduction measures taken by governments and other third-parties to lower health care costs. The Company anticipates all of these actions,
and additional actions in the future, will continue to negatively affect revenue performance.

31

Table of Contents

If  credit  and  economic  conditions  worsen,  the  resulting  economic  and  currency  impacts  in  the  affected  markets  and  globally  could  have  a  material

adverse effect on the Company’s results.

The Company faces intense competition from lower cost generic products.

In  general,  the  Company  faces  increasing  competition  from  lower-cost  generic  products.  The  patent  rights  that  protect  its  products  are  of  varying
strengths and durations. In addition, in some countries, patent protection is significantly weaker than in the United States or in the EU. In the United States and the
EU, political pressure to reduce spending on prescription drugs has led to legislation and other measures that encourage the use of generic and biosimilar products.
Although it is the Company’s policy to actively protect its patent rights, generic challenges to the Company’s products can arise at any time, and the Company’s
patents may not prevent the emergence of generic competition for its products.

Loss of patent protection for a product typically is followed promptly by generic substitutes, reducing the Company’s sales of that product. Availability
of generic substitutes for the Company’s drugs may adversely affect its results of operations and cash flow. In addition, proposals emerge from time to time in the
United States and other countries for legislation to further encourage the early and rapid approval of generic drugs. Any such proposal that is enacted into law could
worsen this substantial negative effect on the Company’s sales and, potentially, its business, cash flow, results of operations, financial condition and prospects.

The Company faces intense competition from competitors’ products.

The Company’s products face intense competition from competitors’ products. This competition may increase as new products enter the market. In such
an event, the competitors’ products may be safer or more effective, more convenient to use, have better insurance coverage or reimbursement levels or be more
effectively marketed and sold than the Company’s products. Alternatively,  in the case of generic competition, including the generic availability  of competitors’
branded  products,  they  may  be  equally  safe  and  effective  products  that  are  sold  at  a  substantially  lower  price  than  the  Company’s  products.  As  a  result,  if  the
Company fails to maintain its competitive position, this could have a material adverse effect on its business, cash flow, results of operations, financial condition
and prospects. In addition, if products that were measured at fair value and capitalized in connection with acquisitions experience difficulties in the market that
negatively impact product cash flows, the Company may recognize material non-cash impairment charges with respect to the value of those products.

The global COVID-19 pandemic is having an adverse impact on the Company’s business, operations and financial performance. The Company
is  unable  to  predict  the  full  extent  to  which  the  COVID-19  pandemic  or  any  future  pandemic,  epidemic  or  similar  public  health  threat  will  adversely
impact its business, operations, financial performance, results of operations, and financial condition.

The Company’s business and financial results were negatively impacted by the outbreak of COVID-19 in 2020. The continued duration and severity of
the  COVID-19  pandemic  is  uncertain,  rapidly  changing  and  difficult  to  predict.  The  degree  to  which  COVID-19  impacts  the  Company’s  results  in  2021  will
depend on future developments, beyond the Company’s knowledge or control, including, but not limited to, the duration of the outbreak, its severity, the success of
actions taken to contain or prevent the virus or treat its impact, and how quickly and to what extent normal economic and operating conditions can resume.

In 2020, the COVID-19 pandemic impacted the Company’s business in numerous ways. As expected, within the Company’s human health business,
revenue  was negatively  impacted  by reduced  access  to  health  care  providers  given social  distancing  measures,  which  negatively  affected  vaccine  and  oncology
sales in particular. The estimated overall negative impact of the COVID-19 pandemic to Merck’s revenue for the full year 2020 was approximately $2.5 billion,
largely attributable to the Pharmaceutical segment, with approximately $50 million attributable to the Animal Health segment.

Roughly  two-thirds  of  Merck’s  Pharmaceutical  segment  revenue  is  comprised  of  physician-administered  products,  which,  despite  strong  underlying
demand, have been affected by social distancing measures, fewer well visits and delays in elective surgeries due to the COVID-19 pandemic. These impacts, as
well as the prioritization of COVID-19 patients at health care providers, have resulted in reduced administration of many of the Company’s human health products,
in particular for its vaccines, including Gardasil 9, as well as for Keytruda and Implanon/

32

Table of Contents

Nexplanon.  In  addition,  declines  in  elective  surgeries  negatively  affected  the  demand  for  Bridion.  However,  sales  of  Pneumovax 23  have  increased  due  to
heightened awareness of pneumococcal vaccination.

Merck  believes  that  global  health  systems  and  patients  have  largely  adapted  to  the  impacts  of  COVID-19,  but  the  Company’s  assumption  is  that
ongoing residual negative impacts will persist, particularly during the first half of 2021 and most notably with respect to vaccine sales, with the impact expected to
be  more  acute  in  the  United  States.  For  the  full  year  of  2021,  Merck  assumes  an  unfavorable  impact  to  revenue  of  approximately  2%  due  to  the  COVID-19
pandemic, all of which relates to Pharmaceutical segment sales. In addition, for the full year of 2021, with respect to the COVID-19 pandemic, Merck expects a net
negative impact to operating expenses, as spending on the development of its COVID-19 antiviral programs is expected to exceed the favorable impact of lower
spending in other areas due to the COVID-19 pandemic. Despite the Company’s efforts to manage these impacts, their ultimate impact will also depend on factors
beyond the Company’s knowledge or control, including the duration of the COVID-19 virus as well as governmental and third-party actions taken to contain or
prevent its spread, treat the virus and mitigate its public health and economic effects. In addition, any future pandemic, epidemic or similar public health threat
could present similar risks to the Company’s business, cash flow, results of operations, financial condition and prospects.

The Company has significant global operations, which expose it to additional risks, and any adverse event could have a material adverse effect

on the Company’s results of operations and financial condition.

The extent of the Company’s operations outside the United States is significant. Risks inherent in conducting a global business include:

•

changes in medical reimbursement policies and programs and pricing restrictions in key markets;

• multiple regulatory requirements that could restrict the Company’s ability to manufacture and sell its products in key markets;

•

•

•

•

trade  protection  measures  and  import  or  export  licensing  requirements,  including  the  imposition  of  trade  sanctions  or  similar  restrictions  by the
United States or other governments;

foreign exchange fluctuations;

diminished protection of intellectual property in some countries; and

possible nationalization and expropriation.

In  addition,  there  may  be  changes  to  the  Company’s  business  and  political  position  if  there  is  instability,  disruption  or  destruction  in  a  significant
geographic region, regardless of cause, including war, terrorism, riot, civil insurrection or social unrest; and natural or man-made disasters, including famine, flood,
fire, earthquake, storm or disease.

Failure to attract and retain highly qualified personnel could affect the Company’s ability to successfully develop and commercialize products.

The  Company’s  success  is  largely  dependent  on  its  continued  ability  to  attract  and  retain  highly  qualified  scientific,  technical  and  management
personnel, as  well  as  personnel  with  expertise  in  clinical  research  and  development, governmental  regulation  and  commercialization.  Competition  for  qualified
personnel in the pharmaceutical industry is intense. The Company cannot be sure that it will be able to attract and retain quality personnel or that the costs of doing
so will not materially increase.

In the past, the Company has experienced difficulties and delays in manufacturing certain of its products, including vaccines.

Merck has, in the past, experienced difficulties in manufacturing certain of its products, including vaccines. For example, in 2020 the Company issued a
product  recall  for  Zerbaxa following  the  identification  of  product  sterility  issues.  The  Company  may,  in  the  future,  experience  other  difficulties  and  delays  in
manufacturing its products, such as (i) failure of the Company or any of its vendors or suppliers to comply with Current Good Manufacturing Practices and other
applicable regulations and quality assurance guidelines that could lead to

33

Table of Contents

manufacturing  shutdowns,  product  shortages  and  delays  in  product  manufacturing;  (ii)  delays  related  to  the  construction  of  new  facilities  or  the  expansion  of
existing facilities, including those intended to support future demand for the Company’s products; and (iii) other manufacturing or distribution problems including
changes in manufacturing production sites and limits to manufacturing capacity due to regulatory requirements, changes in types of products produced, or physical
limitations that could impact continuous supply. In addition, the Company could experience difficulties or delays in manufacturing its products caused by natural
disasters, such as hurricanes. Manufacturing difficulties can result in product shortages, leading to lost sales and reputational harm to the Company.

The Company may not be able to realize the expected benefits of its investments in emerging markets.

The Company has been taking steps to increase its sales in emerging markets. However, there is no guarantee that the Company’s efforts to expand
sales in these markets will succeed. Some countries within emerging markets may be especially vulnerable to periods of global financial instability or may have
very  limited  resources  to  spend  on  health  care.  In  order  for  the  Company  to  successfully  implement  its  emerging  markets  strategy,  it  must  attract  and  retain
qualified personnel. The Company may also be required to increase its reliance on third-party agents within less developed markets. In addition, many of these
countries  have  currencies  that  fluctuate  substantially  and,  if  such  currencies  devalue  and  the  Company  cannot  offset  the  devaluations,  the  Company’s  financial
performance within such countries could be adversely affected.

The Company’s business in China has grown rapidly in the past few years, and the importance of China to the Company’s overall pharmaceutical and
vaccines  business  outside  the  United  States  has  increased  accordingly.  Continued  growth  of  the  Company’s  business  in  China  is  dependent  upon  ongoing
development of a favorable environment for innovative pharmaceutical products and vaccines, sustained access for the Company’s currently marketed products,
and the absence of trade impediments or adverse pricing controls. As noted above in “Competition and the Health Care Environment,” pricing pressure in China
has  increased  as  the  Chinese  government  has  been  taking  steps  to  reduce  costs,  including  implementing  health  care  reform  that  has  led  to  the  acceleration  of
generic substitution, where available. In 2017, the Chinese government updated the NRDL for the first time in eight years. While the mechanism for drugs being
added to the list evolves, inclusion may require a price negotiation which could impact the outlook in the market for selected brands. In 2020, drugs were added to
the NRDL through double-digit price reductions. While pricing pressure has always existed in China, health care reform has increased this pressure in part due to
the  acceleration  of  generic  substitution  through  the  government’s  VBP  program.  In  2019,  the  government  implemented  the  VBP  program  through  a  tendering
process for mature products which have generic substitutes with a Generic Quality Consistency Evaluation approval. Mature products that have entered into the
first three rounds of VBP had, on average, a price reduction of 50%. The Company expects VBP to be a semi-annual process that will have a significant impact on
mature  products  moving  forward.  In  addition,  the  Company  anticipates  that  the  reported  inquiries  made  by  various  governmental  authorities  involving
multinational pharmaceutical companies in China may continue.

For all these reasons, sales within emerging markets carry significant risks. However, at the same time macro-economic growth of selected emerging
markets is expected to outpace Europe and even the United States, leading to significant increased headcount spending in those countries and access to innovative
medicines  for  patients.  A  failure  to  maintain  the  Company’s  presence  in  emerging  markets  could  therefore  have  a  material  adverse  effect  on  the  Company’s
business, cash flow, results of operations, financial condition and prospects.

The Company is exposed to market risk from fluctuations in currency exchange rates and interest rates.

The  Company  operates  in  multiple  jurisdictions  and  virtually  all  sales  are  denominated  in  currencies  of  the  local  jurisdiction.  Additionally,  the
Company has entered and will enter into business development transactions, borrowings or other financial transactions that may give rise to currency and interest
rate exposure.

Since the Company cannot, with certainty, foresee and mitigate against such adverse fluctuations, fluctuations in currency exchange rates, interest rates

and inflation could negatively affect the Company’s business, cash flow, results of operations, financial condition and prospects.

34

Table of Contents

In order to mitigate against the adverse impact of these market fluctuations, the Company will from time to time enter into hedging agreements. While
hedging agreements, such as currency options and forwards and interest rate swaps, may limit some of the exposure to exchange rate and interest rate fluctuations,
such attempts to mitigate these risks may be costly and not always successful.

Certain of the Company’s interest rate derivatives and investments are based on the London Interbank Offered Rate (LIBOR), and a portion of Merck’s
indebtedness  bears  interest  at  variable  interest  rates,  primarily  based  on  LIBOR.  LIBOR  is  the  subject  of  recent  national,  international  and  other  regulatory
guidance and proposals for reform,  which will cause LIBOR to cease to exist entirely  in the future. While the Company expects that reasonable  alternatives  to
LIBOR  will  be  implemented  prior  to  its  termination,  the  Company  cannot  predict  the  consequences  and  timing  of  these  developments,  which  could  include  an
increase in interest expense and may also require the amendment of contracts that reference LIBOR.

Pharmaceutical products can develop unexpected safety or efficacy concerns.

Unexpected safety or efficacy concerns can arise with respect to marketed products, whether or not scientifically justified, leading to product recalls,

withdrawals, or declining sales, as well as product liability, consumer fraud and/or other claims, including potential civil or criminal governmental actions.

Reliance on third-party relationships and outsourcing arrangements could materially adversely affect the Company’s business.

The Company depends on third parties, including suppliers, alliances with other pharmaceutical and biotechnology companies, and third-party service
providers, for key aspects of its business including development, manufacture and commercialization of its products and support for its information technology (IT)
systems.  Failure  of  these  third  parties  to  meet  their  contractual,  regulatory  and  other  obligations  to  the  Company  or  the  development  of  factors  that  materially
disrupt the relationships between the Company and these third parties could have a material adverse effect on the Company’s business.

Negative events in the animal health industry could have a material adverse effect on future results of operations and financial condition.

Future sales of key animal health products could be adversely affected by a number of risk factors including certain risks that are specific to the animal
health business. For example,  the outbreak  of disease  carried  by animals,  such as African Swine Fever, could lead to their widespread death  and precautionary
destruction as well as the reduced consumption and demand for animals, which could adversely affect the Company’s results of operations. Also, the outbreak of
any  highly  contagious  diseases  near  the  Company’s  main  production  sites  could  require  the  Company  to  immediately  halt  the  manufacture  of  its  animal  health
products at such sites or force the Company to incur substantial expenses in procuring raw materials or products elsewhere. Other risks specific to animal health
include  epidemics  and  pandemics,  government  procurement  and  pricing  practices,  weather  and  global  agribusiness  economic  events.  As  the  Animal  Health
segment of the Company’s business becomes more significant, the impact of any such events on future results of operations would also become more significant.

Biologics  and  vaccines  carry  unique  risks  and  uncertainties,  which  could  have  a  material  adverse  effect  on  the  Company’s  future  results  of

operations and financial condition.

The successful development, testing, manufacturing and commercialization of biologics and vaccines, particularly human and animal health vaccines, is

a long, complex, expensive and uncertain process. There are unique risks and uncertainties related to biologics and vaccines, including:

•

There may be limited access to, and supply of, normal and diseased tissue samples, cell lines, pathogens, bacteria, viral strains and other biological
materials. In addition, government regulations in multiple jurisdictions, such as the United States and the EU, could result in restricted access to, or
transport or use of, such materials. If the Company loses access to sufficient sources of such materials, or if tighter restrictions are imposed on the
use of such materials, the Company may not be able to conduct research activities as planned and may incur additional development costs.

35

Table of Contents

•

The  development,  manufacturing  and  marketing  of  biologics  and  vaccines  are  subject  to  regulation  by  the  FDA, the  EMA  and  other  regulatory
bodies. These regulations are often more complex and extensive than the regulations applicable to other pharmaceutical products. For example, in
the United States, a BLA, including both pre-clinical and clinical trial data and extensive data regarding the manufacturing procedures, is required
for human vaccine candidates, and FDA approval is generally required for the release of each manufactured commercial lot.

• Manufacturing biologics and vaccines, especially in large quantities, is often complex and may require the use of innovative technologies to handle
living  micro-organisms.  Each  lot  of  an  approved  biologic  and  vaccine  must  undergo  thorough  testing  for  identity,  strength,  quality,  purity  and
potency.  Manufacturing  biologics  requires  facilities  specifically  designed  for  and  validated  for  this  purpose,  and  sophisticated  quality  assurance
and  quality  control  procedures  are  necessary.  Slight  deviations  anywhere  in  the  manufacturing  process,  including  filling,  labeling,  packaging,
storage  and  shipping  and  quality  control  and  testing,  may  result  in  lot  failures,  product  recalls  or  spoilage.  When  changes  are  made  to  the
manufacturing process, the Company may be required to provide pre-clinical and clinical data showing the comparable identity, strength, quality,
purity or potency of the products before and after such changes.

•

•

Biologics and vaccines are frequently costly to manufacture because production ingredients are derived from living animal or plant material, and
most  biologics  and  vaccines  cannot  be  made  synthetically.  In  particular,  keeping  up  with  the  demand  for  vaccines  may  be  difficult  due  to  the
complexity of producing vaccines.

The use of biologically derived ingredients can lead to variability in the manufacturing process and could lead to allegations of harm, including
infections or allergic reactions, which allegations would be reviewed through a standard investigation process that could lead to closure of product
facilities due to possible contamination. Any of these events could result in substantial costs.

Risks Relating to Government Regulation and Legal Proceedings

The health care industry in the United States has been, and will continue to be, subject to increasing regulation and political action.

As discussed above “Competition and the Health Care Environment,” the Company believes that the health care industry will continue to be subject to

increasing regulation as well as political and legal action, as future proposals to reform the health care system are considered by the Executive branch, Congress
and state legislatures.

In 2010, the United States enacted major health care reform legislation in the form of the ACA. Various insurance market reforms have advanced and
state and federal insurance exchanges were launched in 2014. The ACA increased the mandated Medicaid rebate from 15.1% to 23.1%, expanded the rebate to
Medicaid managed care utilization, and increased the types of entities eligible for the federal 340B drug discount program.

The  ACA  also  requires  pharmaceutical  manufacturers  to  pay  70%  of  the  cost  of  medicine,  including  biosimilar  products,  when  Medicare  Part  D
beneficiaries  are  in  the  Medicare  Part  D  coverage  gap  (i.e.,  the  so-called  “donut  hole”).  In  2020,  the  Company’s  revenue  was  reduced  by  approximately  $700
million due to this requirement. Also, pharmaceutical manufacturers are required to pay an annual non-tax deductible health care reform fee. In 2020, the Company
recorded $85 million of costs for this annual fee.

In February 2016, the Centers for Medicare & Medicaid Services (CMS) issued the Medicaid rebate final rule that implemented provisions of the ACA
effective  April  1,  2016.  The  rule  provides  comprehensive  guidance  on  the  calculation  of  Average  Manufacturer  Price  and  Best  Price;  two  metrics  utilized  to
determine  the  rebates  drug  manufacturers  are  required  to  pay  to  state  Medicaid  programs.  More  recently,  although  CMS  previously  declined  to  define  what
constitutes a product “line extension” (beyond the statutory definition), CMS issued a new rule on December 21, 2020 that will significantly expand the definition
of  the  term  “line  extension”  as  of  January  1,  2022  to  include  a  broad  range  of  products,  including  products  reflecting  new  strengths,  dosage  forms,  release
mechanisms, and routes of administration. This expanded definition will increase the number of drugs subject to a higher Medicaid rebate. Effective January 1,
2023, this final rule also changes the way that manufacturers must calculate Best Price, in relation to certain patient support programs, including coupons, which
also may result in an increase in

36

Table of Contents

the Company’s Medicaid rebates. The impact of these and other provisions in this final rule could adversely impact the Company’s business, cash flow, results of
operations, financial condition and prospects.

As discussed above in “Competition and the Health Care Environment,” in November 2020, the Department of Health and Human Services Office of
Inspector General (OIG) issued a Final Rule that would, effective January 1, 2023, eliminate the Anti-Kickback Statute safe harbor for rebates paid to Medicare
Part  D  plans  or  to  PBMs  on  behalf  of  such  plans.  While  the  Company  cannot  anticipate  the  effects  of  this  change  to  the  way  it  currently  contracts,  this  new
framework could significantly alter the way it does business with Part D Plan Sponsors and PBMs on behalf of such plans.

On November 20, 2020, CMS also issued the MFN Rule, which was intended to be effective  January 1, 2021, to institute a new pricing system for
certain prescription drugs and biologic products covered by Medicare Part B in which Medicare would reimburse no more than the “most favored nation price,”
meaning  the  lowest  price  after  adjusting  for  volume  and  differences  in  gross  domestic  product,  for  the  top  fifty  Part  B  reimbursed  products,  which  includes
Keytruda, sold in 22 member countries of the OECD, rather than use the current Average Sales Price (“ASP”)-based payment framework for certain physician-
administered drugs. Implementation of the MFN Rule could have a material adverse effect on the Company’s business, cash flow, results of operations, financial
condition and prospects.

The  FDA  also  recently  issued  rulemaking  allowing  the  commercial  importation  of  certain  prescription  drugs  from  Canada  through  FDA-authorized,
time-limited programs sponsored by states or Native American tribes recognized under the rule, and, in certain future circumstances, pharmacists and wholesalers.
The FDA also recently released a final guidance for industry detailing procedures for drug manufacturers to import FDA-approved prescription drug, biological,
and combination products that were manufactured abroad and authorized and intended for sale in a foreign country. These changes, if they become effective, could
have a material adverse effect on the Company’s business, cash flow, results of operations, financial condition and prospects.

Several  organizations,  including  two  trade  groups  of  which  Merck  is  a  member,  have  filed  suit  challenging  the  MFN  Rule.  Those  lawsuits  remain
pending with a preliminary injunction having been entered in one of the cases. A trade organization in which Merck is a member brought suit, which is pending, in
federal district court challenging the commercial importation rule.

The  Company  cannot  predict  the  likelihood  of  these  regulations  becoming  effective  or  what  additional  future  changes  in  the  health  care  industry  in
general,  or the pharmaceutical  industry  in particular,  will occur,  however, these  changes  could have a material  adverse effect  on the Company’s business, cash
flow, results of operations, financial condition and prospects.

The  Company’s  products,  including  products  in  development,  cannot  be  marketed  unless  the  Company  obtains  and  maintains  regulatory

approval.

The  Company’s  activities,  including  research,  pre-clinical  testing,  clinical  trials  and  the  manufacturing  and  marketing  of  its  products,  are  subject  to
extensive regulation by numerous federal, state and local governmental authorities in the United States, including the FDA, and by foreign regulatory authorities,
including in the EU, Japan and China. In the United States, the FDA administers requirements covering the testing, approval, safety, effectiveness, manufacturing,
labeling and marketing of prescription pharmaceuticals. In many cases, the FDA requirements have increased the amount of time and money necessary to develop
new products and bring them to market in the United States. Regulation outside the United States also is primarily focused on drug safety and effectiveness and, in
many  cases,  reduction  in  the  cost  of  drugs.  The  FDA  and  foreign  regulatory  authorities,  including  in  Japan  and  China,  have  substantial  discretion  to  require
additional testing, to delay or withhold registration and marketing approval and to otherwise preclude distribution and sale of a product.

Even if the Company is successful in developing new products, it will not be able to market any of those products unless and until it has obtained all
required regulatory approvals in each jurisdiction where it proposes to market the new products. Once obtained, the Company must maintain approval as long as it
plans  to  market  its  new  products  in  each  jurisdiction  where  approval  is  required.  The  Company’s  failure  to  obtain  approval,  significant  delays  in  the  approval
process,  or  its  failure  to  maintain  approval  in  any  jurisdiction  will  prevent  it  from  selling  the  products  in  that  jurisdiction.  The  Company  would  not  be  able  to
realize revenues for those new products in any jurisdiction where it does not have approval.

37

Table of Contents

Developments following regulatory approval may adversely affect sales of the Company’s products.

Even  after  a  product  reaches  the  market,  certain  developments  following  regulatory  approval  may  decrease  demand  for  the  Company’s  products,

including the following:

•

•

•

•

•

results in post-approval Phase 4 trials or other studies;

the re-review of products that are already marketed;

the recall or loss of marketing approval of products that are already marketed;

changing government standards or public expectations regarding safety, efficacy, quality or labeling changes; and

scrutiny of advertising and promotion.

In the past, clinical trials and post-marketing surveillance of certain marketed drugs of the Company and of competitors within the industry have raised
concerns that have led to recalls, withdrawals or adverse labeling of marketed products. Clinical trials and post-marketing surveillance of certain marketed drugs
also have raised concerns among some prescribers and patients relating to the safety or efficacy of pharmaceutical products in general that have negatively affected
the sales of such products. In addition, increased scrutiny of the outcomes of clinical trials has led to increased volatility in market reaction. Further, these matters
often attract litigation and, even where the basis for the litigation is groundless, considerable resources may be needed to respond.

In addition, following in the wake of product withdrawals and other significant safety issues, health authorities such as the FDA, the EMA, Japan’s
PMDA and China’s NMPA have increased their focus on safety when assessing the benefit/risk balance of drugs. Some health authorities appear to have become
more cautious when making decisions about approvability of new products or indications.

If previously unknown side effects are discovered or if there is an increase in negative publicity regarding known side effects of any of the Company’s
products, it could significantly reduce demand for the product or require the Company to take actions that could negatively affect sales, including removing the
product from the market, restricting its distribution or applying for labeling changes. Further, in the current environment in which all pharmaceutical companies
operate, the Company is at risk for product liability and consumer protection claims and civil and criminal governmental actions related to its products, research
and/or marketing activities. In addition, dissemination of promotional materials through evolving digital channels serves to increase visibility and scrutiny in the
marketplace.

The Company is subject to a variety of U.S. and international laws and regulations.

The Company is currently subject to a number of government laws and regulations and, in the future, could become subject to new government laws
and regulations. The costs of compliance with such laws and regulations, or the negative results of non-compliance, could adversely affect the business, cash flow,
results of operations, financial condition and prospects of the Company; these laws and regulations include (i) additional health care reform initiatives in the United
States or in other countries, including additional mandatory discounts or fees; (ii) the U.S. Foreign Corrupt Practices Act or other anti-bribery and corruption laws;
(iii)  new  laws,  regulations  and  judicial  or  other  governmental  decisions  affecting  pricing,  drug  reimbursement,  and  access  or  marketing  within  or  across
jurisdictions;  (iv) changes in intellectual  property laws; (v) changes in accounting  standards;  (vi) new and increasing  data privacy regulations  and enforcement,
particularly  in  the  EU  and  the  United  States;  (vii)  legislative  mandates  or  preferences  for  local  manufacturing  of  pharmaceutical  or  vaccine  products;  (viii)
emerging and new global regulatory requirements for reporting payments and other value transfers to health care professionals; (ix) environmental regulations; and
(x) the potential impact of importation restrictions, embargoes, trade sanctions and legislative and/or other regulatory changes.

38

Table of Contents

The Company is subject to evolving and complex tax laws, which may result in additional liabilities that may affect results of operations and

financial condition.

The Company is subject to evolving and complex tax laws in the jurisdictions in which it operates. Significant judgment is required for determining the
Company’s  tax  liabilities,  and  the  Company’s  tax  returns  are  periodically  examined  by  various  tax  authorities.  The  Company  believes  that  its  accrual  for  tax
contingencies is adequate for all open years based on past experience, interpretations of tax law, and judgments about potential actions by tax authorities; however,
due to the complexity of tax contingencies, the ultimate resolution of any tax matters may result in payments greater or less than amounts accrued. In addition, the
Company may be negatively affected by changes in tax laws, or new tax laws, affecting, for example, tax rates, and/or revised tax law interpretations in domestic or
foreign jurisdictions.

Product liability insurance for products may be limited, cost prohibitive or unavailable.

As a result of a number of factors, product liability insurance has become less available while the cost of such insurance has increased significantly. The
Company is subject to a substantial number of product liability claims. See Item 8. “Financial Statements and Supplementary Data,” Note 10. “Contingencies and
Environmental Liabilities” below for more information on the Company’s current product liability litigation. With respect to product liability, the Company self-
insures  substantially  all  of  its  risk,  as  the  availability  of  commercial  insurance  has  become  more  restrictive.  The  Company  has  evaluated  its  risks  and  has
determined that the cost of obtaining product liability insurance outweighs the likely benefits of the coverage that is available and, as such, has no insurance for
most  product  liabilities.  The  Company  will  continually  assess  the  most  efficient  means  to  address  its  risk;  however,  there  can  be  no  guarantee  that  insurance
coverage will be obtained or, if obtained, will be sufficient to fully cover product liabilities that may arise.

Risks Related to Technology

The  Company  is  increasingly  dependent  on  sophisticated  software  applications  and  computing  infrastructure.  In  2017,  the  Company
experienced  a  network  cyber-attack  that  led  to  a  disruption  of  its  worldwide  operations,  including  manufacturing,  research  and  sales  operations.  The
Company could be a target of future cyber-attacks.

The Company is increasingly dependent on sophisticated software applications, complex information technology systems, computing infrastructure, and
cloud service providers (collectively, IT systems) to conduct critical operations. Certain of these systems are managed, hosted, provided or used by third parties to
assist  in  conducting  the  Company’s  business.  Disruption,  degradation,  or  manipulation  of  these  IT  systems  through  intentional  or  accidental  means  by  the
Company’s employees, third parties with authorized access or unauthorized third parties could adversely affect key business processes. Cyber-attacks against the
Company’s IT systems or third-party providers’ IT systems, such as cloud-based systems, could result in exposure of confidential information, the modification of
critical data, and/or the failure of critical operations. Misuse of any of these IT systems could result in the disclosure of sensitive personal information or the theft
of trade secrets, intellectual property, or other confidential business information. The Company continues to leverage new and innovative technologies across the
enterprise to improve the efficacy and efficiency of its business processes; the use of which can create new risks.

In 2017, the Company experienced a network cyber-attack that led to a disruption of its worldwide operations, including manufacturing, research and

sales operations, and resulting losses.

The Company has implemented a variety of measures to further enhance and modernize its systems to guard against similar attacks in the future, and
also  is  pursuing  an  enterprise-wide  effort  to  enhance  the  Company's  resiliency  against  future  cyber-attacks,  including  incidents  similar  to  the  2017  attack.  The
objective of these efforts is not only to protect against future cyber-attacks, but also to improve the speed of the Company’s recovery from such attacks and enable
continued business operations to the greatest extent possible during any recovery period.

Although the aggregate impact of cyber-attacks and network disruptions, including the 2017 cyber-attack, on the Company’s operations and financial
condition has not been material to date, the Company continues to be a target of events of this nature and expects them to continue. The Company monitors its data,
information technology and personnel usage of Company IT systems to reduce these risks and continues to do so on an ongoing

39

Table of Contents

basis  for  any  current  or  potential  threats.  There  can  be  no  assurance  that  the  Company’s  efforts  to  protect  its  data  and  IT  systems  or  the  efforts  of  third-party
providers  to  protect  their  IT  systems  will  be  successful  in  preventing  disruptions  to  the  Company’s  operations,  including  its  manufacturing,  research  and  sales
operations. Such disruptions have in the past and could in the future result in loss of revenue, or the loss of critical or sensitive information from the Company’s or
the Company’s third-party providers’ databases or IT systems and have in the past and could in the future also result in financial, legal, business or reputational
harm to the Company and substantial remediation costs.

Social media platforms present risks and challenges.

The inappropriate  and/or unauthorized use of certain social media channels could cause brand damage or information  leakage  or could lead to legal
implications,  including  from  the  improper  collection  and/or  dissemination  of  personally  identifiable  information.  In  addition,  negative  or  inaccurate  posts  or
comments about the Company or its products on any social networking platforms could damage the Company’s reputation, brand image and goodwill. Further, the
disclosure of non-public Company-sensitive information by the Company’s workforce or others through external media channels could lead to information loss.
Although  there  is  an  internal  Company  Social  Media  Policy  that  guides  employees  on  appropriate  personal  and  professional  use  of  social  media  about  the
Company,  the  processes  in  place  may  not  completely  secure  and  protect  information.  Identifying  new  points  of  entry  as  social  media  continues  to  expand  also
presents new challenges.

Risks Related to the Proposed Spin-Off of Organon

The proposed Spin-Off of Organon may not be completed on the terms or timeline currently contemplated, if at all, and may not achieve the

expected results.

In February 2020, the Company announced its intention to Spin-Off products from its women’s health, biosimilars and established brands businesses
into a new, independent, publicly traded company, which has been named Organon & Co. (Organon) through a distribution of Organon’s publicly traded stock to
Company  shareholders.  The  distribution  is  expected  to  qualify  as  tax-free  to  the  Company  and  its  shareholders  for  U.S.  federal  income  tax  purposes.  The
transaction is expected to be completed late in the second quarter of 2021. Completion of the Spin-Off will be subject to a number of factors and conditions, and
there can be no assurances that the Company will be able to complete the Spin-Off on the terms or on the timeline that was announced, if at all. Unanticipated
developments  could  delay,  prevent  or  otherwise  adversely  affect  the  proposed  Spin-Off,  including  but  not  limited  to  disruptions  in  general  or  financial  market
conditions or potential problems or delays in obtaining various regulatory and tax approvals or clearances. In addition, consummation of the proposed Spin-Off will
require final approval from the Company’s Board of Directors.

The costs to complete the proposed Spin-Off will be significant. In addition, the Company may be unable to achieve some or all of the strategic

and financial benefits that it expects to achieve from the Spin-Off of Organon.

The Company will incur significant expenses in connection with the Spin-Off. In addition, the Company may not be able to achieve the full strategic
and financial benefits that are expected to result from the Spin-Off. The anticipated benefits of the Spin-Off are based on a number of assumptions, some of which
may prove incorrect.

Following the Spin-Off, the price of shares of the Company’s common stock may fluctuate significantly.

The Company cannot predict the effect of the Spin-Off on the trading price of shares of its common stock, and the market value of shares of its common
stock may be less than, equal to or greater than the market value of shares of its common stock prior to the Spin-Off. In addition, the price of Merck’s common
stock may be more volatile around the time of the Spin-Off.

There  could  be  significant  income  tax  liability  if  the  Spin-Off  or  certain  related  transactions  are  determined  to  be  taxable  for  U.S.  federal

income tax purposes.

The Company expects that prior to completion of the Spin-Off it will receive an opinion from its U.S. tax counsel that concludes, among other things,

that the Spin-Off of all of the outstanding Organon shares to Merck

40

Table of Contents

shareholders and certain related transactions will qualify as tax-free to Merck and its shareholders under Sections 355 and 368 of the U.S. Internal Revenue Code,
except to the extent of any cash received in lieu of fractional shares of Organon common stock. Any such opinion is not binding on the Internal Revenue Service
(IRS). Accordingly, while the Company believes the risk is low, the IRS may reach conclusions with respect to the Spin-Off that are different from the conclusions
reached in the opinion. The opinion will rely on certain facts, assumptions, representations and undertakings from Merck and Organon regarding the past and future
conduct of the companies’ respective businesses and other matters, which, if incomplete, incorrect or not satisfied, could alter the conclusions of the party giving
such opinion.

If the proposed Spin-Off ultimately  is determined to be taxable, which the Company believes is unlikely, the Spin-Off could be treated as a taxable
dividend  to  Merck’s  shareholders  for  U.S.  federal  income  tax  purposes,  and  Merck’s  shareholders  could  incur  significant  U.S. federal  income  tax  liabilities.  In
addition, Merck would recognize a taxable gain to the extent that the fair market value of Organon common stock exceeds Merck’s tax basis in such stock on the
date of the Spin-Off.

Cautionary Factors that May Affect Future Results

(Cautionary Statements Under the Private Securities Litigation Reform Act of 1995)

This report and other written reports and oral statements made from time to time by the Company may contain so-called “forward-looking statements,”
all of which are based on management’s current expectations and are subject to risks and uncertainties which may cause results to differ materially from those set
forth  in  the  statements.  One  can  identify  these  forward-looking  statements  by  their  use  of  words  such  as  “anticipates,”  “expects,”  “plans,”  “will,”  “estimates,”
“forecasts,” “projects” and other words of similar meaning, or negative variations of any of the foregoing. One can also identify them by the fact that they do not
relate  strictly  to  historical  or  current  facts.  These  statements  are  likely  to  address  the  Company’s  growth  strategy,  financial  results,  product  approvals,  product
potential,  development  programs  and  include  statements  related  to  the  expected  impact  of  the  COVID-19  pandemic.  One  must  carefully  consider  any  such
statement and should understand that many factors could cause actual results to differ materially from the Company’s forward-looking statements. These factors
include  inaccurate  assumptions  and  a  broad  variety  of  other  risks  and  uncertainties,  including  some  that  are  known  and  some  that  are  not.  No  forward-looking
statement can be guaranteed and actual future results may vary materially. The Company does not assume the obligation to update any forward-looking statement.
The Company cautions you not to place undue reliance on these forward-looking statements. Although it is not possible to predict or identify all such factors, they
may include the following:

•

•

Competition from generic and/or biosimilar products as the Company’s products lose patent protection.

Increased “brand” competition in therapeutic areas important to the Company’s long-term business performance.

•

The  difficulties  and  uncertainties  inherent  in  new  product  development.  The  outcome  of  the  lengthy  and  complex  process  of  new  product
development  is  inherently  uncertain.  A  drug  candidate  can  fail  at  any  stage  of  the  process  and  one  or  more  late-stage  product  candidates  could  fail  to  receive
regulatory approval. New product candidates may appear promising in development but fail to reach the market because of efficacy or safety concerns, the inability
to obtain necessary regulatory approvals, the difficulty or excessive cost to manufacture and/or the infringement of patents or intellectual property rights of others.
Furthermore, the sales of new products may prove to be disappointing and fail to reach anticipated levels.

•

Pricing  pressures,  both  in  the  United  States  and  abroad,  including  rules  and  practices  of  managed  care  groups,  judicial  decisions  and

governmental laws and regulations related to Medicare, Medicaid and health care reform, pharmaceutical reimbursement and pricing in general.

•

The impact of the global COVID-19 pandemic and any future pandemic, epidemic, or similar public health threat, on the Company’s business,

operations and financial performance.

•

Changes  in  government  laws  and  regulations,  including  laws  governing  intellectual  property,  and  the  enforcement  thereof  affecting  the

Company’s business.

41

Table of Contents

•

Efficacy or safety concerns with respect to marketed products, whether or not scientifically justified, leading to product recalls, withdrawals or

declining sales.

•

Significant  changes  in  customer  relationships  or  changes  in  the  behavior  and  spending  patterns  of  purchasers  of  health  care  products  and
services, including delaying medical procedures, rationing prescription medications, reducing the frequency of physician visits and foregoing health care insurance
coverage.

•

Legal  factors,  including  product  liability  claims,  antitrust  litigation  and  governmental  investigations,  including  tax  disputes,  environmental
concerns  and  patent  disputes  with  branded  and  generic  competitors,  any  of  which  could  preclude  commercialization  of  products  or  negatively  affect  the
profitability of existing products.

•

•

Cyber-attacks on the Company’s or third-party providers’ information technology systems, which could disrupt the Company’s operations.

Lost market opportunity resulting from delays and uncertainties in the approval process of the FDA and foreign regulatory authorities.

•

Increased focus on privacy issues in countries around the world, including the United States and the EU. The legislative and regulatory landscape
for privacy and data protection continues to evolve, and there has been an increasing amount of focus on privacy and data protection issues with the potential to
affect directly the Company’s business, including recently enacted laws in a majority of states in the United States requiring security breach notification.

•

•

Changes in tax laws including changes related to the taxation of foreign earnings.

Changes  in  accounting  pronouncements  promulgated  by  standard-setting  or  regulatory  bodies,  including  the  Financial  Accounting  Standards

Board and the SEC, that are adverse to the Company.

•

•

Economic factors over which the Company has no control, including changes in inflation, interest rates and foreign currency exchange rates.

The proposed Spin-Off might be delayed or the costs to complete the Spin-Off might be more significant than expected.

This list should not be considered an exhaustive statement of all potential risks and uncertainties. See “Risk Factors” above.

Item 1B. Unresolved Staff Comments.

None.

Item 2.

Properties.

The  Company’s  corporate  headquarters  is  currently  located  in  Kenilworth,  New  Jersey.  The  Company  has  previously  announced  that  it  intends  to
consolidate  its  New  Jersey  campuses  into  a  single  corporate  headquarters  location  in  Rahway,  New  Jersey  by  the  end  of  2023.  The  Company  also  maintains
operational or divisional headquarters in Kenilworth, New Jersey; Madison, New Jersey and Upper Gwynedd, Pennsylvania. Principal U.S. research facilities are
located  in  Rahway  and  Kenilworth,  New  Jersey;  West  Point,  Pennsylvania;  Boston,  Massachusetts;  South  San  Francisco,  California;  and  Elkhorn,  Nebraska
(Animal  Health).  Principal  research  facilities  outside  the  United  States  are  located  in  the  United  Kingdom,  Switzerland  and  China.  Merck’s  manufacturing
operations are currently headquartered in Whitehouse Station, New Jersey. The Company also has production facilities for human health products at nine locations
in  the  United  States  and  Puerto  Rico.  Outside  the  United  States,  through  subsidiaries,  the  Company  owns  or  has  an  interest  in  manufacturing  plants  or  other
properties  in  Japan,  Singapore,  South  Africa,  and  other  countries  in  Western  Europe,  Central  and  South  America,  and  Asia.  A  number  of  properties  will  be
transferred to Organon in the Spin-Off.

Capital expenditures were $4.7 billion in 2020, $3.5 billion in 2019 and $2.6 billion in 2018. In the United States, these amounted to $2.7 billion in

2020, $1.9 billion in 2019 and $1.5 billion in 2018. Abroad, such expenditures amounted to $2.0 billion in 2020, $1.6 billion in 2019, and $1.1 billion in 2018.

42

Table of Contents

The Company and its subsidiaries own their principal facilities and manufacturing plants under titles that they consider to be satisfactory. The Company
believes that its properties are in good operating condition and that its machinery and equipment have been well maintained. The Company believes that its plants
for  the  manufacture  of  products  are  suitable  for  their  intended  purposes  and  have  capacities  and  projected  capacities,  including  previously-disclosed  capital
expansion projects, that will be adequate for current and projected needs for existing Company products. Some capacity of the plants is being converted, with any
needed modification, to the requirements of newly introduced and future products.

Item 3.

Legal Proceedings.

The  information  called  for  by  this  Item  is  incorporated  herein  by  reference  to  Item  8.  “Financial  Statements  and  Supplementary  Data,”  Note  10.

“Contingencies and Environmental Liabilities”.

Item 4. Mine Safety Disclosures.

Not Applicable.

43

Table of Contents

Executive Officers of the Registrant (ages as of February 1, 2021)

All  officers  listed  below  serve  at  the  pleasure  of  the  Board  of  Directors.  None  of  these  officers  was  elected  pursuant  to  any  arrangement  or

understanding between the officer and any other person(s).

Name

Kenneth C. Frazier

Sanat Chattopadhyay

Frank Clyburn

Robert M. Davis

Richard R. DeLuca, Jr.

Michael W. Fleming

Julie L. Gerberding

Rita A. Karachun

Dean Li

Steven C. Mizell 

Michael T. Nally

Jennifer Zachary

Age
66

61

56

54

58

62

65

57

58

60

45

43

Chairman, President and Chief Executive Officer (since December 2011)

Offices and Business Experience

Executive Vice President and President, Merck Manufacturing Division (since March 2016)

Executive Vice President, Chief Commercial Officer (since January 2019); President, Global
Oncology Business Unit (October 2013-December 2018)

Executive Vice President, Global Services, and Chief Financial Officer (since April 2016);
Executive Vice President and Chief Financial Officer (April 2014-April 2016)

Executive Vice President and President, Merck Animal Health (since September 2011)

Senior Vice President, Chief Ethics and Compliance Officer (since March 2019); Senior Vice
President, International Legal and Compliance (January 2017-March 2019); Vice President,
International Legal and Compliance (July 2008-January 2017)

Executive Vice President and Chief Patient Officer, Strategic Communications, Global Public
Policy and Population Health (since July 2016); Executive Vice President for Strategic
Communications, Global Public Policy and Population Health (January 2015-July 2016)

Senior Vice President Finance - Global Controller (since March 2014)

President, Merck Research Laboratories (since January 2021); Senior Vice President, Discovery
Sciences and Translational Medicine, Merck Research Laboratories (November 2017-January
2020); Vice President, Translational Medicine (March 2017-November 2017); Prior to that, Chief
Scientific Officer and Associate Vice President, University of Utah Health Sciences
Executive Vice President, Chief Human Resources Officer (since December 2016); Executive
Vice President, Human Resources, Monsanto Company (August 2011-December 2016)

Executive Vice President, Chief Marketing Officer (since January 2019); President, Global
Vaccines, Global Human Health (September 2016-January 2019); Managing Director, United
Kingdom and Ireland, Global Human Health (January 2014-September 2016)

Executive Vice President, General Counsel and Corporate Secretary (since January 2020);
Executive Vice President and General Counsel (April 2018-January 2020); Partner, Covington &
Burling LLP (January 2013-March 2018)

In February 2021, Merck announced that Kenneth C. Frazier, chairman and chief executive officer, will retire as chief executive officer, effective June
30, 2021. Mr. Frazier will continue to serve on Merck’s Board of Directors as executive chairman, for a transition period to be determined by the board. The Merck
Board  of  Directors  has  unanimously  elected  Robert  M.  Davis,  Merck’s  current  executive  vice  president,  global  services  and  chief  financial  officer,  as  chief
executive officer, as well as a member of the board, effective July 1, 2021. Mr. Davis will become president of Merck, effective April 1, 2021, at which time the
Company’s operating divisions—Human Health, Animal Health, Manufacturing, and Merck Research Laboratories—will begin reporting to Mr. Davis.

44

Table of Contents

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

The principal market for trading of the Company’s Common Stock is the New York Stock Exchange (NYSE) under the symbol MRK.

As of January 31, 2021, there were approximately 104,900 shareholders of record of the Company’s Common Stock.

Issuer purchases of equity securities for the three months ended December 31, 2020 were as follows:

Period
October 1 — October 31
November 1 — November 30
December 1 — December 31
Total

Issuer Purchases of Equity Securities

(1)

Total Number
of Shares
Purchased
—
—
—
—

Average Price 
Paid Per 
Share
$0.00
$0.00
$0.00
$0.00

($ in millions)
Approximate Dollar Value of Shares
That May Yet Be Purchased
Under the Plans or Programs
(1)
$5,888
$5,888
$5,888
$5,888

(1)

The Company did not purchase any shares during the three months ended December 31, 2020 under the plan approved by the Board of Directors in October 2018 to purchase up to $10
billion in Merck shares for its treasury.

45

 
Table of Contents

The following graph assumes a $100 investment on December 31, 2015, and reinvestment of all dividends, in each of the Company’s Common Shares,
the S&P 500 Index, and a composite peer group of major U.S. and European-based pharmaceutical companies, which are: AbbVie Inc., Amgen Inc., AstraZeneca
plc, Bristol-Myers Squibb Company, Johnson & Johnson, Eli Lilly and Company, GlaxoSmithKline plc, Novartis AG, Pfizer Inc., Roche Holding AG, and Sanofi
SA.

Performance Graph

Comparison of Five-Year Cumulative Total Return*
Merck & Co., Inc., Composite Peer Group and S&P 500 Index

MERCK
PEER GRP.**
S&P 500

End of 
Period Value
$180
157
203

2020/2015 
CAGR*
12%
9%
15%

MERCK
PEER GRP.
S&P 500

2015
100.0
100.0
100.0

2016
115.1
96.9
112.0

2017
113.4
116.1
136.4

2018
158.9
124.1
130.4

2019
194.3
147.2
171.4

2020
180.1
157.2
203.0

*    Compound Annual Growth Rate
**    Peer group average was calculated on a market cap weighted basis.

This Performance Graph will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange
Act  of  1934,  except  to  the  extent  that  the  Company  specifically  incorporates  it  by  reference.  In  addition,  the  Performance  Graph  will  not  be  deemed  to  be
“soliciting material” or to be “filed” with the SEC or subject to Regulation 14A or 14C, other than as provided in Regulation S-K, or to the liabilities of section 18
of  the  Securities  Exchange  Act  of  1934,  except  to  the  extent  that  the  Company  specifically  requests  that  such  information  be  treated  as  soliciting  material  or
specifically incorporates it by reference into a filing under the Securities Act or the Exchange Act.

46

Table of Contents

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following section of this Form 10-K generally discusses 2020 and 2019 results and year-to-year comparisons between 2020 and 2019. Discussion
of  2018 results  and  year-to-year  comparisons  between  2019 and  2018  that  are  not  included  in  this  Form  10-K  can  be  found  in  “Management’s  Discussion  and
Analysis  of  Financial  Condition  and  Results  of  Operations”  in  Part  II,  Item  7  of  the  Company’s  Annual  Report  on  Form  10-K  for  the  fiscal  year  ended
December 31, 2019 filed on February 26, 2020.

Description of Merck’s Business

Merck & Co., Inc. (Merck or the Company) is a global health care company that delivers innovative health solutions through its prescription medicines,
vaccines,  biologic  therapies  and  animal  health  products.  The  Company’s  operations  are  principally  managed  on  a  products  basis  and  include  two  operating
segments, which are the Pharmaceutical and Animal Health segments, both of which are reportable segments.

The Pharmaceutical segment includes human health pharmaceutical and vaccine products. Human health pharmaceutical products consist of therapeutic
and  preventive  agents,  generally  sold  by  prescription,  for  the  treatment  of  human  disorders.  The  Company  sells  these  human  health  pharmaceutical  products
primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy
benefit managers and other institutions. Human health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at
physician offices. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities.

The Animal Health segment discovers, develops, manufactures and markets a wide range of veterinary pharmaceutical and vaccine products, as well as
health management solutions and services, for the prevention, treatment and control of disease in all major livestock and companion animal species. The Company
also  offers  an  extensive  suite  of  digitally  connected  identification,  traceability  and  monitoring  products.  The  Company  sells  its  products  to  veterinarians,
distributors and animal producers.

The Company previously had a Healthcare Services segment that provided services and solutions focused on engagement, health analytics and clinical

services to improve the value of care delivered to patients. The Company divested the remaining businesses in this segment in the first quarter of 2020.

The Company previously had an Alliances segment that primarily included activity from the Company’s relationship with AstraZeneca LP related to

sales of Nexium and Prilosec, which concluded in 2018.

Planned Spin-Off of Women’s Health, Biosimilars and Established Brands into a New Company

In  February  2020, Merck  announced  its  intention  to  spin-off  products  from  its women’s  health,  biosimilars  and  established  brands  businesses  into  a
new, independent, publicly traded company named Organon & Co. (Organon) through a distribution of Organon’s publicly traded stock to Company shareholders.
The distribution is expected to qualify as tax-free to the Company and its shareholders for U.S. federal income tax purposes. The established brands included in the
transaction consist of dermatology, non-opioid pain management, respiratory, and select cardiovascular products including Zetia and Vytorin, as well as the rest of
Merck’s diversified brands franchise. Merck’s existing research pipeline programs will continue to be owned and developed within Merck as planned. Organon
will  have  development  capabilities  initially  focused  on  late-stage  development  and  life-cycle  management  and  is  expected  over  time  to  develop  research
capabilities in selected therapeutic areas. The spin-off is expected to be completed late in the second quarter of 2021, subject to market and certain other conditions.

47

Table of Contents

Overview

Financial Highlights

($ in millions)
Sales

Net Income Attributable to Merck & Co., Inc.
Non-GAAP Net Income Attributable to Merck & Co., Inc.

 (1)

Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common

Shareholders

Non-GAAP Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc.

Common Shareholders

 (1)

2020
47,994 

$

7,067 
15,082 

$2.78

$5.94

% Change

% Change 
Excluding Foreign 
Exchange

2 %

(28)%
13 %

(27)%

14 %

4  % $

(25) %
16  %

(24) %

17  %

2019
46,840 

9,843 
13,382 

$3.81

$5.19

(1)

 Non-GAAP net income and non-GAAP earnings per share (EPS) exclude acquisition and divestiture-related costs, restructuring costs and certain other items. For further discussion and a
reconciliation of GAAP to non-GAAP net income and EPS (see “Non-GAAP Income and Non-GAAP EPS” below).

Executive Summary

Worldwide sales were $48.0 billion in 2020, an increase of 2% compared with 2019, or 4% excluding the unfavorable effect from foreign exchange.
The  sales  increase  was  driven  primarily  by  oncology,  certain  hospital  acute  care  products  and  animal  health.  Growth  in  these  areas  was  largely  offset  by  the
negative effects of the coronavirus disease 2019 (COVID-19) pandemic as discussed below, the effects of generic competition, particularly in the diversified brands
and women’s health franchises, competitive pressure in the virology franchise and pricing pressure in the diabetes franchise.

During 2020, Merck continued executing on its strategic priorities reporting year-over-year sales growth despite the business challenges posed by the
COVID-19  pandemic.  Roughly  two-thirds  of  Merck’s  Pharmaceutical  segment  revenue  is  comprised  of  physician-administered  products,  sales  of  which  were
negatively affected in 2020 by patients’ inability to access health care providers, fewer well visits, and social distancing measures. However, in the latter part of the
year, the Company experienced a partial recovery in the underlying demand for products across its key growth pillars. Despite the pandemic, Merck employees
across the organization continued their important work, enrolling and maintaining clinical studies, progressing the pipeline and ensuring the supply of and patient
access  to  the  Company’s  portfolio  of  medically  important  medicines  and  vaccines.  The  Company  also  executed  on  Merck’s  capital  allocation  priorities  by
completing business development transactions and investing in its pipeline. Additionally, the Company remains on track to complete the spin-off of Organon late in
the  second  quarter  of  2021  thereby  creating  two  companies,  each  focused  on  their  strengths  and  portfolios  allowing  them  to  pursue  their  respective  market
opportunities and business strategies. In 2020, the products that will comprise Organon had total sales of $6.5 billion.

Merck  actively  monitors  the  business  development  landscape  for  growth  opportunities  that  meet  the  Company’s  strategic  criteria.  To  expand  its
oncology  presence,  Merck  completed  the  acquisitions  of  ArQule,  Inc.  (ArQule),  a  biopharmaceutical  company  focused  on  kinase  inhibitor  discovery  and
development for the treatment of cancer and other diseases; and VelosBio Inc. (VelosBio), a clinical-stage biopharmaceutical company committed to developing
first-in-class  cancer  therapies  targeting  receptor  tyrosine  kinase-like  orphan  receptor  1  (ROR1)  currently  being  evaluated  for  the  treatment  of  patients  with
hematologic  malignancies  and  solid  tumors.  Additionally,  Merck  entered  into  strategic  collaboration  agreements  with  Seagen  to  gain  access  to  ladiratuzumab
vedotin, an investigational antibody-drug conjugate targeting LIV-1, and Tukysa (tucatinib), a small molecule tyrosine kinase inhibitor for the treatment of human
epidermal growth factor receptor 2 (HER2)-positive cancers. To augment Merck’s animal health business, the Company acquired the U.S. rights to Sentinel Flavor
Tabs and Sentinel Spectrum Chews.

As  part  of  industry-wide  efforts  to  develop  solutions  to  the  pandemic,  the  Company  acquired  OncoImmune,  a  company  developing  a  therapeutic
candidate  for  the  treatment  of  patients  hospitalized  with  COVID-19;  and  Themis  Bioscience  GmbH  (Themis),  a  company  focused  on  vaccines  and  immune-
modulation therapies for infectious diseases, including a COVID-19 vaccine candidate. Additionally, Merck entered into

48

Table of Contents

strategic  collaborations  with  Ridgeback  Biotherapeutics  LP  (Ridgeback  Bio)  to  develop  an  orally  available  antiviral  candidate  in  clinical  development  for  the
treatment of patients with COVID-19; and with the International AIDS Vaccine Initiative, Inc. (IAVI) to develop an investigational vaccine against SARS-CoV-2
being studied for the prevention of COVID-19. In January 2021, the Company announced it was discontinuing development of the COVID-19 vaccine candidates
(see Note 3 to the consolidated financial statements).

During 2020, the Company received numerous regulatory approvals within oncology. Keytruda received approval in the United States as monotherapy
in the therapeutic areas of cutaneous squamous cell carcinoma (cSCC), metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR)
colorectal  cancer,  non-muscle  invasive  bladder  cancer  (NMIBC)  and  tumor  mutational  burden-high  (TMB-H)  solid  tumors,  as  well  as  in  combination  with
chemotherapy for the treatment of triple-negative breast cancer (TNBC). Merck also received approval in the United States for an every six weeks (Q6W) dosing
regimen  across  all  adult  indications.  Additionally,  Keytruda received  approval  in  China  for  the  treatment  of  certain  patients  with  head  and  neck  squamous  cell
carcinoma (HNSCC) and in both China and Japan for the treatment of certain patients with esophageal squamous cell carcinoma (ESCC). Lynparza, which is being
developed  in  collaboration  with  AstraZeneca  PLC  (AstraZeneca),  received  approval  in  the  United  States:  in  combination  with  bevacizumab  as  a  first-line
maintenance  treatment  of  certain  adult  patients  with  advanced  epithelial  ovarian,  fallopian  tube  or  primary  peritoneal  cancer  who  are  in  complete  or  partial
response to first-line  platinum-based chemotherapy; and  for  the treatment  of  certain adult  patients with metastatic  castration-resistant prostate cancer  (mCRPC)
following progression on prior treatment. Additionally, Lynparza was approved in the European Union (EU): as monotherapy for the treatment of adult patients
with mCRPC and BRCA1/2 mutations who have progressed following a prior therapy; and for the maintenance treatment of certain adult patients with metastatic
adenocarcinoma of the pancreas. Lynparza was also approved in Japan for the treatment of three types of advanced cancer: ovarian, prostate and pancreatic cancer.
Lenvima,  which  is  being  developed  in  collaboration  with  Eisai  Co., Ltd.  (Eisai),  received  approval  in  China  as  monotherapy  for  the  treatment  of  differentiated
thyroid cancer.

Also in 2020, Gardasil 9 was approved for use in women and girls in Japan where it is marketed as Silgard 9. Additionally, in 2020, the U.S. Food and
Drug and Administration (FDA) granted accelerated approval for an expanded indication for Gardasil 9 for the prevention of oropharyngeal and other head and
neck cancers caused by certain HPV types. In January 2021, the Company received FDA approval for Verquvo (vericiguat), to reduce the risk of cardiovascular
death and heart failure hospitalization following a hospitalization for heart failure or need for outpatient intravenous diuretics in adults. Verquvo is being jointly
developed with Bayer AG (Bayer).

In  addition  to  the  recent  regulatory  approvals  discussed  above,  the  Company  advanced  its  late-stage  pipeline  with  several  regulatory  submissions.
Keytruda is under review in United States and/or internationally for the treatment of certain patients with TNBC, classical Hodgkin Lymphoma (cHL), colorectal
cancer, cSCC, esophageal and gastric cancer. Lenvima is under review in Japan as monotherapy for the treatment of thymic cancer. V114, an investigational 15-
valent pneumococcal conjugate vaccine, is under priority review by the FDA for the prevention of invasive pneumococcal disease in adults 18 years of age and
older. The European Medicines Agency (EMA) is also reviewing an application for licensure of V114 in adults. The Company is involved in litigation challenging
the validity of several Pfizer Inc. patents that relate to pneumococcal vaccine technology in the United States and several foreign jurisdictions.

The Company’s Phase 3 oncology programs include Keytruda in the therapeutic areas of biliary tract, cervical, cutaneous squamous cell, endometrial,
gastric,  hepatocellular,  mesothelioma,  ovarian,  prostate  and  small-cell  lung  cancers;  Lynparza  as  monotherapy  for  colorectal  cancer  and  in  combination  with
Keytruda for  non-small-cell  lung  and  small-cell  lung  cancers;  and  Lenvima  in  combination  with  Keytruda for  bladder,  endometrial,  gastric,  head  and  neck,
melanoma  and  non-small-cell  lung  cancers.  Also  within  oncology,  MK-6482,  belzutifan,  an  investigational  hypoxia-inducible  factor-2  alpha  (HIF-2α)  inhibitor
being evaluated for the treatment of patients with von Hippel-Lindau disease-associated renal cell carcinoma (RCC),  received Breakthrough Therapy designation
from the FDA. Additionally, the Company has candidates  in Phase 3 clinical development in several other therapeutic  areas, including MK-7264, gefapixant, a
selective, non-narcotic, orally-administered, investigational P2X3-receptor antagonist being developed for the treatment of refractory, chronic cough; MK-7110, an
investigational treatment for patients hospitalized with COVID-19; MK-8591A, islatravir, an investigational nucleoside reverse transcriptase translocation inhibitor
(NRTTI) in combination with doravirine for the treatment of HIV-1 infection; and V114, which is being evaluated for the prevention of pneumococcal disease in
pediatric patients.

49

Table of Contents

The Company is allocating resources to support its commercial opportunities in the near term while making the necessary investments to support long-
term growth. Research and development expenses in 2020 reflect higher costs related to business development activity, higher clinical development spending and
increased investment in discovery research and early drug development.

In November 2020, Merck’s Board of Directors approved an increase to the Company’s quarterly dividend, raising it to $0.65 per share from $0.61 per

share on the Company’s outstanding common stock. During 2020, the Company returned $7.5 billion to shareholders through dividends and share repurchases.

Management

In February 2021, Merck announced that Kenneth C. Frazier, chairman and chief executive officer, will retire as chief executive officer, effective June
30, 2021. Mr. Frazier will continue to serve on Merck’s Board of Directors as executive chairman, for a transition period to be determined by the board. The Merck
Board  of  Directors  has  unanimously  elected  Robert  M.  Davis,  Merck’s  current  executive  vice  president,  global  services  and  chief  financial  officer,  as  chief
executive officer, as well as a member of the board, effective July 1, 2021. Mr. Davis will become president of Merck, effective April 1, 2021, at which time the
Company’s operating divisions—Human Health, Animal Health, Manufacturing, and Merck Research Laboratories (MRL)—will begin reporting to Mr. Davis.

COVID-19

Overall, in response to the COVID-19 pandemic, Merck remains focused on protecting the safety of its employees, ensuring that its supply of medicines
and vaccines reaches its patients, contributing its scientific expertise to the development of antiviral approaches, and supporting health care providers and Merck’s
communities.  Although  COVID-19-related  disruptions  to  patients’  ability  to  access  health  care  providers  negatively  affected  results  in  2020,  Merck  remains
confident in the fundamental underlying demand for its products and its prospects for long-term growth.

In  2020,  the  estimated  negative  impact  of  the  COVID-19  pandemic  to  Merck’s  sales  was  approximately  $2.5  billion,  largely  attributable  to  the
Pharmaceutical  segment,  with  approximately  $50  million  attributable  to  the  Animal  Health  segment.  Roughly  two-thirds  of  Merck’s  Pharmaceutical  segment
revenue is comprised of physician-administered products, which, despite strong underlying demand, have been affected by social distancing measures, fewer well
visits and delays in elective surgeries due to the COVID-19 pandemic. These impacts, as well as the prioritization of COVID-19 patients at health care providers,
have  resulted  in  reduced  administration  of  many  of  the  Company’s  human  health  products,  in  particular  for  its  vaccines,  including  Gardasil 9,  as  well  as  for
Keytruda and  Implanon/Nexplanon.  In  addition,  declines  in  elective  surgeries  negatively  affected  the  demand  for  Bridion.  However,  sales  of  Pneumovax 23
increased due to heightened awareness of pneumococcal vaccination.

Operating expenses were positively affected in 2020 by approximately $600 million primarily due to lower promotional and selling costs, as well as

lower research and development expenses, net of investments in COVID-19-related antiviral and vaccine research programs.

Merck  believes  that  global  health  systems  and  patients  have  largely  adapted  to  the  impacts  of  COVID-19,  but  the  Company’s  assumption  is  that
ongoing residual negative impacts will persist, particularly during the first half of 2021 and most notably with respect to vaccine sales, with the impact expected to
be  more  acute  in  the  United  States.  For  the  full  year  of  2021,  Merck  assumes  an  unfavorable  impact  to  revenue  of  approximately  2%  due  to  the  COVID-19
pandemic, all of which relates to Pharmaceutical segment sales. In addition, for the full year of 2021, with respect to the COVID-19 pandemic, Merck expects a net
negative impact to operating expenses, as spending on the development of its COVID-19 antiviral programs is expected to exceed the favorable impact of lower
spending in other areas due to the COVID-19 pandemic.

Pricing

Global efforts toward health care cost containment continue to exert pressure on product pricing and market  access worldwide. Changes to the U.S.
health  care  system  as  part  of  health  care  reform,  as  well  as  increased  purchasing  power  of  entities  that  negotiate  on  behalf  of  Medicare,  Medicaid,  and  private
sector beneficiaries, have contributed to pricing pressure. In several international markets, government-mandated pricing actions have reduced prices of generic and
patented drugs. In addition, the Company’s revenue performance in 2020 was negatively

50

Table of Contents

affected by other cost-reduction measures taken by governments and other third-parties to lower health care costs. The Company anticipates all of these actions and
additional actions in the future will continue to negatively affect revenue performance.

Operating Results

Sales

($ in millions)

United States
International
Total

2020
21,027 
26,967 
47,994 

$

$

% Change

% Change 
Excluding Foreign 
Exchange

2  %
2  %
2  %

2  % $
5  %
4  % $

2019
20,519 
26,321 
46,840 

% Change

% Change 
Excluding Foreign 
Exchange

12  %
10  %
11  %

12  % $
13  %
13  % $

2018
18,346 
23,949 
42,294 

U.S. plus international may not equal total due to rounding.

Worldwide  sales  grew  2%  in  2020  due  to  higher  sales  in  the  oncology  franchise  reflecting  strong  growth  of  Keytruda, as well as increased alliance
revenue from Lynparza and Lenvima. Also contributing to revenue growth were higher sales of certain vaccines, including Gardasil/Gardasil 9 and Pneumovax
23, as well as increased sales of certain hospital acute care products, including Prevymis and Bridion. Higher sales of animal health products also drove revenue
growth in 2020.

Sales  growth  in  2020  was  partially  offset  by  the  effects  of  generic  competition  for  certain  products  including  women’s  health  product  NuvaRing,
hospital acute care products Noxafil and Cubicin, oncology products Emend/Emend for Injection, cardiovascular products Zetia and Vytorin, and products within
the  diversified  brands  franchise,  particularly  Singulair. The  diversified  brands  franchise  includes  certain  products  that  are  approaching  the  expiration  of  their
marketing  exclusivity  or  that  are  no  longer  protected  by  patents  in  developed  markets.  Lower  sales  of  pediatric  vaccines,  including  ProQuad, M-M-R II,  and
Varivax, as well as lower sales of diabetes products Januvia and Janumet, and virology products Zepatier and Isentress/Isentress HD also partially offset revenue
growth in 2020. As discussed above, the COVID-19 pandemic negatively affected sales in 2020.

Sales in the United States grew 2% in 2020 primarily driven by higher sales of Keytruda, increased alliance revenue from Lynparza and Lenvima, and
higher sales of animal health products. Revenue growth was largely offset by lower sales of NuvaRing, Januvia, Noxafil, Emend/Emend for Injection,  M-M-R II,
Janumet, Varivax and Implanon/Nexplanon.

International sales grew 2% in 2020. The increase in international sales primarily reflects growth in Keytruda, Gardasil/Gardasil 9, increased alliance
revenue from Lynparza, as well as higher sales of Pneumovax 23, Prevymis, Januvia and animal health products. Sales growth was partially offset by lower sales of
Zepatier, Vytorin, Noxafil, Zetia, Remicade, Emend/Emend for Injection and products within the diversified brands franchise, particularly  Singulair and Nasonex.
International sales represented 56% of total sales in both 2020 and 2019.

See Note 18 to the consolidated financial statements for details on sales of the Company’s products. A discussion of performance for select products in

the franchises follows.

Pharmaceutical Segment

Oncology

($ in millions)
Keytruda
Alliance Revenue - Lynparza
Alliance Revenue - Lenvima 
Emend

 (1)

(1)

$

2020
14,380 
725 
580 
145 

% Change

% Change 
Excluding Foreign
Exchange

30  %
63  %
44  %
(63) %

30  % $
62  %
43  %
(62) %

2019
11,084 
444 
404 
388 

% Change

% Change 
Excluding Foreign 
Exchange

55 %
137 %
171 %
(26)%

58  % $

141  %
173  %
(24) %

2018

7,171 
187 
149 
522 

(1)

 Alliance revenue represents Merck’s share of profits, which are product sales net of cost of sales and commercialization costs (see Note 4 to the consolidated financial statements).

51

Table of Contents

Keytruda is  an  anti-PD-1  (programmed  death  receptor-1)  therapy  that  has  been  approved  as  monotherapy  for  the  treatment  of  certain  patients  with
cervical cancer, cHL, cSCC, ESCC, gastric or gastroesophageal junction adenocarcinoma, HNSCC, hepatocellular carcinoma (HCC), non-small-cell lung cancer
(NSCLC),  small-cell  lung  cancer  (SCLC),  melanoma,  Merkel  cell  carcinoma,  MSI-H  or  dMMR  cancer  including  MSI-H/dMMR  colorectal  cancer,  primary
mediastinal large B-cell lymphoma (PMBCL), TMB-H cancer, and urothelial carcinoma including NMIBC. Keytruda is also approved for the treatment of certain
patients: in combination with chemotherapy for metastatic squamous and nonsquamous NSCLC, in combination with chemotherapy for HNSCC, in combination
with  chemotherapy  for  TNBC,  in  combination  with  axitinib  for  RCC,  and  in  combination  with  Lenvima  for  endometrial  carcinoma.  The  Keytruda clinical
development program includes studies across a broad range of cancer types.

Global  sales  of  Keytruda grew  30%  in  2020 driven  by  higher  demand  as  the  Company  continues  to  launch  Keytruda with multiple  new indications
globally, although the COVID-19 pandemic had a dampening effect on growing demand. Sales in the United States continue to build across the multiple approved
indications,  in  particular  for  the  treatment  of  advanced  NSCLC  as  monotherapy,  and  in  combination  with  chemotherapy  for  both  nonsquamous  and  squamous
metastatic NSCLC, along with uptake in the RCC, adjuvant melanoma, HNSCC, bladder cancer and endometrial carcinoma indications. Uptake of the every six
weeks (Q6W) adult dosing regimen in the United States benefited sales in 2020. Keytruda sales growth in international markets was driven by continued uptake in
approved  indications,  particularly  in  the  EU.  Sales  growth  was  partially  offset  by  declines  in  Japan  due  to  pricing.  Pursuant  to  a  re-pricing  rule,  the  Japanese
government reduced the price of Keytruda by 17.5% effective  February  2020. Additionally,  Keytruda was subject  to another  price  reduction  of  20.9% in  April
2020 under a provision of the Japanese pricing rules.

In January 2020, the FDA approved Keytruda as monotherapy for the treatment of certain patients with Bacillus Calmette-Guerin (BCG)-unresponsive,

high-risk, NMIBC based on the results of the KEYNOTE-057 trial.

In April 2020, the FDA granted accelerated approval for an additional recommended dosage of 400 mg every six weeks (Q6W) for Keytruda across all
adult indications, including monotherapy and combination therapy. This new dosage option is available in addition to the current dose of 200 mg every three weeks
(Q3W).

In June 2020, the FDA granted accelerated approval for Keytruda as monotherapy for the treatment of adult and pediatric patients with unresectable or
metastatic TMB-H solid tumors, as determined by an FDA-approved test, that have progressed following prior treatment and who have no satisfactory alternative
treatment options based in part on the results of the KEYNOTE-158 trial.

Also in June 2020, the FDA approved Keytruda as monotherapy for the treatment of patients with recurrent or metastatic cSCC that is not curable by

surgery or radiation based on data from the KEYNOTE-629 trial.

Additionally in June 2020, the FDA approved Keytruda as monotherapy for the first-line treatment of patients with unresectable or metastatic MSI-H or

dMMR colorectal cancer based on results from the KEYNOTE-177 trial.

In October 2020, the FDA approved an expanded label for Keytruda as monotherapy for the treatment of adult patients with relapsed or refractory cHL
based on results from the KEYNOTE-204 trial. The FDA also approved an updated pediatric indication for Keytruda for the treatment of pediatric patients with
refractory cHL or cHL that has relapsed after two or more lines of therapy. Keytruda was previously approved under the FDA’s accelerated approval process for
the  treatment  of  adult  and  pediatric  patients  with  refractory  cHL,  or  who  have  relapsed  after  three  or  more  prior  lines  of  therapy  based  on  data  from  the
KEYNOTE-087 trial. In accordance with accelerated approval regulations, continued approval was contingent upon verification and description of clinical benefit;
these accelerated approval requirements have been fulfilled with the data from KEYNOTE-204.

In November 2020, the FDA granted accelerated approval for Keytruda in combination with chemotherapy for the treatment of patients with locally
recurrent  unresectable  or  metastatic  TNBC  whose  tumors  express  PD-L1  (Combined  Positive  Score  [CPS]  ≥10) as  determined  by  an  FDA-approved  test.  The
approval is based on results from the KEYNOTE-355 trial.

In June 2020, Keytruda was approved by the National Medical Products Administration (NMPA) in China as monotherapy for the second-line treatment

of patients with locally advanced or metastatic ESCC whose

52

Table of Contents

tumors express PD-L1 (CPS ≥10). This indication was granted based on the KEYNOTE-181 trial, including data from an extension of the global study in Chinese
patients.  In  December  2020,  China’s  NMPA  approved  Keytruda as  monotherapy  for  the  first-line  treatment  of  patients  with  metastatic  or  with  unresectable,
recurrent HNSCC whose tumors express PD-L1 (CPS ≥20) as determined by a fully validated test.

In  August  2020,  Keytruda was  approved  by  Japan’s  Pharmaceuticals  and  Medical  Devices  Agency  (PMDA)  as  monotherapy  for  the  treatment  of
patients whose tumors are PD-L1-positive, and have radically unresectable, advanced or recurrent ESCC who have progressed after chemotherapy. The approval
was based on results from the KEYNOTE-181 trial. Additionally, Keytruda was approved by Japan’s PMDA for use at an additional recommended dosage of 400
mg Q6W, including monotherapy and combination therapy. This new dosage option is available in addition to the current dose of 200 mg Q3W.

In January 2021, Keytruda was approved by the European Commission (EC) as a first-line treatment in adult patients with MSI-H or dMMR colorectal

cancer based on the results of the KEYNOTE-177 study.

The Company is a party to certain third-party license agreements pursuant to which the Company pays royalties on sales of Keytruda. Under the terms
of the more significant of these agreements, Merck pays a royalty of 6.5% on worldwide sales of Keytruda through 2023 to one third party; this royalty will decline
to 2.5% for 2024 through 2026 and will terminate thereafter. The Company pays an additional 2% royalty on worldwide sales of Keytruda to another third party,
the termination date of which varies by country; this royalty will expire in the United States in 2024 and in major European markets in 2025. The royalties are
included in Cost of sales.

Lynparza,  an  oral  poly  (ADP-ribose)  polymerase  (PARP)  inhibitor  being  developed  as  part  of  a  collaboration  with  AstraZeneca  (see  Note  4  to  the
consolidated  financial  statements),  is approved  for  the treatment  of certain  types  of advanced  ovarian,  breast,  pancreatic  and prostate  cancers.  Alliance  revenue
related to Lynparza grew 63% in 2020 due to continued uptake across the multiple approved indications in the United States, the EU, China and Japan.

In  May  2020,  the  FDA  approved  Lynparza  in  combination  with  bevacizumab  as  a  first-line  maintenance  treatment  of  certain  adult  patients  with
advanced  epithelial  ovarian,  fallopian  tube  or  primary  peritoneal  cancer  who  are  in  complete  or  partial  response  to  first-line  platinum-based  chemotherapy.  In
November 2020, Lynparza was approved in the EU for the maintenance treatment of adult patients with advanced high-grade epithelial ovarian, fallopian tube or
primary  peritoneal  cancer  who  are  in  complete  or  partial  response  following  completion  of  first-line  platinum-based  chemotherapy  in  combination  with
bevacizumab and whose cancer is associated with homologous recombination deficiency (HRD)-positive status. These approvals were based on the results from the
PAOLA-1 trial.

Also  in  May  2020,  the  FDA  approved  Lynparza  for  the  treatment  of  adult  patients  with  deleterious  or  suspected  deleterious  germline  or  somatic
homologous recombination repair (HRR) gene-mutated mCRPC who have progressed following prior treatment. In November 2020, Lynparza was approved in the
EU as monotherapy  for the treatment  of adult patients  with mCRPC and BRCA1/2  mutations  (germline  and/or  somatic)  who have  progressed  following  a  prior
therapy. These approvals were based on the results from the PROfound trial.

In July 2020, Lynparza was approved in the EU as a monotherapy for the maintenance treatment of adult patients with germline BRCA1/2 mutations
who have metastatic adenocarcinoma of the pancreas and have not progressed after a first-line chemotherapy regimen. This approval was based on the results from
the POLO trial.

In December 2020, Lynparza was approved in Japan for the treatment of three types of advanced cancer: ovarian, prostate and pancreatic cancer. The
three approvals authorize Lynparza for use as maintenance treatment after first-line chemotherapy containing bevacizumab (genetical recombination) in patients
with HRD ovarian cancer; the treatment of patients with BRCA gene-mutated (BRCAm) mCRPC; and maintenance treatment after platinum-based chemotherapy
for patients with BRCAm curatively unresectable pancreas cancer. The concurrent approvals by the Japanese Ministry of Health, Labor, and Welfare are based on
results from the PAOLA-1, PROfound and POLO trials.

Lenvima,  an  oral  receptor  tyrosine  kinase  inhibitor  being  developed  as  part  of  a  collaboration  with  Eisai  (see  Note  4  to  the  consolidated  financial
statements),  is  approved  for  the  treatment  of  certain  types  of  thyroid  cancer,  HCC,  in  combination  with  everolimus  for  certain  patients  with  RCC,  and  in
combination with Keytruda for the

53

Table of Contents

treatment of certain patients with endometrial carcinoma. Alliance revenue related to Lenvima grew 44% in 2020 due to higher demand in the United States, China
and the EU.

In November 2020, China’s NMPA approved Lenvima as a monotherapy for the treatment of differentiated thyroid cancer.

Global sales of Emend, for the prevention of certain chemotherapy-induced nausea and vomiting, declined 63% in 2020 primarily due to lower demand
and  pricing  in  the  United  States  due  to  generic  competition  for  Emend for  Injection  following  U.S.  patent  expiry  in  September  2019.  Also  contributing  to  the
Emend sales  decline  was  lower  demand  in  the  EU  and  Japan  as  a  result  of  generic  competition  for  the  oral  formulation  of  Emend following  loss  of  market
exclusivity in May 2019 and December 2019, respectively. U.S. market exclusivity for the oral formulation of Emend previously expired in 2015.

In April 2020, the FDA approved Koselugo (selumetinib) for the treatment of pediatric patients two years of age and older with neurofibromatosis type
1 (NF1) who have symptomatic, inoperable plexiform neurofibromas (PN). The FDA approval is based on positive results from the National Cancer Institute (NCI)
Cancer Therapy Evaluation Program (CTEP)-sponsored Phase 2 SPRINT Stratum 1 trial coordinated by the NCI’s Center for Cancer Research, Pediatric Oncology
Branch.  This  is  the  first  regulatory  approval  of  a  medicine  for  the  treatment  of  NF1  PN,  a  rare  and  debilitating  genetic  condition.  Koselugo  is  being  jointly
developed and commercialized with AstraZeneca globally (see Note 4 to the consolidated financial statements).

Vaccines

($ in millions)

2020

% Change

% Change 
Excluding
Foreign 
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

Gardasil/Gardasil 9
ProQuad
M-M-R II
Varivax
Pneumovax 23

$

3,938 
678 
378 
823 
1,087 

5  %
(10) %
(31) %
(15) %
17  %

6  % $

(10) %
(31) %
(15) %
18  %

3,737 
756 
549 
970 
926 

19  %
27  %
28  %
25  %
2  %

21  % $
29  %
29  %
28  %
3  %

2018

3,151 
593 
430 
774 
907 

Worldwide sales of Gardasil/Gardasil 9, vaccines to help prevent certain cancers and other diseases caused by certain types of HPV, grew 5% in 2020
primarily  due  to  higher  volumes  in  China  and  the  replenishment  in  2020  of  doses  borrowed  from  the  U.S.  Centers  for  Disease  Control  and  Prevention  (CDC)
Pediatric Vaccine Stockpile in 2019. The replenishment resulted in the recognition of sales of $120 million in 2020, which, when combined with the reduction of
sales of $120 million in 2019 due to the borrowing, resulted in a favorable impact to sales of $240 million in 2020. Lower demand in the United States and Hong
Kong, SAR, PRC attributable to the COVID-19 pandemic partially offset the increase in sales of Gardasil/Gardasil 9.

In June 2020, the FDA approved an expanded indication for Gardasil 9 for the prevention of oropharyngeal and other head and neck cancers caused by
HPV Types 16, 18, 31, 33, 45, 52, and 58. The oropharyngeal and head and neck cancer indication was approved under accelerated approval based on effectiveness
in preventing HPV-related anogenital disease.

In July 2020, Gardasil 9 was approved by the PMDA in Japan for use in women and girls nine years and older for the prevention of cervical cancer,
certain cervical, vaginal and vulvar precancers, and genital warts caused by the HPV types covered by the vaccine. In December 2020, Silgard 9 was also approved
in Japan for the prevention of anal cancer and precursor lesions caused by HPV types 6, 11, 16 and 18 for individuals nine years and older and for genital warts for
men nine years and older. Gardasil 9 is marketed in Japan as Silgard 9.

The Company is a party to certain third-party license agreements pursuant to which the Company pays royalties on sales of Gardasil/Gardasil 9. Under
the terms of the more significant of these agreements, Merck pays a 7% royalty on worldwide sales of Gardasil/Gardasil 9 to one third party (royalty obligations
under this agreement expire in December 2023) and an additional 7% royalty on sales of Gardasil/Gardasil 9 in the United States to another  third  party (these
royalty obligations expire in December 2028). The royalties are included in Cost of sales.

54

Table of Contents

Global sales of ProQuad, a pediatric combination vaccine to help protect against measles, mumps, rubella and varicella, declined 10% in 2020 driven
primarily by lower demand in the United States resulting from fewer measles outbreaks in 2020 compared with 2019, coupled with the unfavorable impact of the
COVID-19 pandemic, partially offset by higher pricing.

Worldwide sales of M-M-R II, a vaccine to help protect against measles, mumps and rubella, declined 31% in 2020 driven primarily by lower demand
in the United States resulting from fewer measles outbreaks in 2020 compared with 2019, coupled with the unfavorable impact of the COVID-19 pandemic. Lower
demand in Brazil also contributed to the M-M-R II sales decline in 2020.

Global sales of Varivax, a vaccine to help prevent chickenpox (varicella), declined 15% in 2020 driven primarily by lower demand in the United States

resulting from the COVID-19 pandemic, partially offset by higher pricing. The Varivax sales decline was also attributable to lower government tenders in Brazil.

Worldwide sales of Pneumovax 23, a vaccine to help prevent pneumococcal disease, grew 17% in 2020 primarily due to higher volumes in the EU and
in the United States attributable in part to heightened awareness of pneumococcal vaccination. Higher pricing in the United States also contributed to Pneumovax
23 sales growth in 2020.

Hospital Acute Care

($ in millions)
Bridion
Noxafil
Prevymis
Cubicin
Zerbaxa

2020

% Change

% Change 
Excluding Foreign 
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

2018

$

1,198 
329 
281 
152 
130 

6  %
(50) %
70  %
(41) %
8  %

7  % $

(50) %
69  %
(40) %
10  %

1,131 
662 
165 
257 
121 

23 %
(11)%
128 %
(30)%
39 %

26  % $
(7) %
131  %
(28) %
42  %

917 
742 
72 
367 
87 

Global sales of Bridion, for the reversal of two types of neuromuscular blocking agents used during surgery, grew 6% in 2020 due to higher demand

globally, particularly in the United States. However, fewer elective surgeries as a result of the COVID-19 pandemic unfavorably affected demand in 2020.

Worldwide  sales  of  Noxafil,  an  antifungal  agent  for  the  prevention  of  certain  invasive  fungal  infections,  declined  50%  in  2020  due  to  generic
competition in the United States and in the EU. The patent that provided U.S. market exclusivity for certain forms of Noxafil representing the majority of U.S.
Noxafil sales  expired  in  July  2019.  Additionally,  the  patent  for  Noxafil expired  in  a  number  of  major  European  markets  in  December  2019.  As  a  result,  the
Company is experiencing volume and pricing declines in Noxafil sales in these markets as a result of generic competition and expects the declines to continue.

Worldwide  sales  of  Prevymis,  a  medicine  for  prophylaxis  (prevention)  of  cytomegalovirus  (CMV)  infection  and  disease  in  adult  CMV-seropositive
recipients of an allogenic hematopoietic stem cell transplant, grew 70% in 2020 due to continued uptake since launch in the EU and in the United States. Prevymis
was approved by the EC in January 2018 and by the FDA in November 2017.

Global  sales  of  Cubicin for  injection,  an  antibiotic  for  the  treatment  of  certain  bacterial  infections,  declined  41%  in  2020  primarily  due  to  ongoing

generic competition in the EU and in the United States.

In December 2020, the Company temporarily suspended sales of Zerbaxa, a combination antibacterial and beta-lactamase inhibitor for the treatment of
certain bacterial infections, and subsequently issued a product recall, following the identification of product sterility issues. As a result, the Company recorded an
intangible asset impairment charge related to Zerbaxa (see Note 8 to the consolidated financial statements). The Company does not anticipate that  Zerbaxa will
return to the market before 2022.

In June 2020, the FDA approved a supplemental New Drug Application (NDA) for Recarbrio (imipenem, cilastatin, and relebactam) for the treatment

of patients 18 years of age and older with hospital-acquired

55

Table of Contents

bacterial pneumonia and ventilator-associated bacterial pneumonia caused by certain susceptible Gram-negative microorganisms.

Immunology

($ in millions)
Simponi
Remicade

2020

% Change

$

838 
330 

1  %
(20) %

% Change 
Excluding Foreign 
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

1  % $

(20) %

830 
411 

(7)%
(29)%

(2) % $
(25) %

2018

893 
582 

Sales of Simponi, a once-monthly subcutaneous treatment for certain inflammatory diseases (marketed by the Company in Europe, Russia and Turkey),
were  nearly  flat  in  2020.  Sales  of  Simponi are  being  unfavorably  affected  by  the  launch  of  biosimilars  for  a  competing  product.  The  Company  expects  this
competition will continue to unfavorably affect sales of Simponi.

Sales of Remicade, a treatment for inflammatory diseases (marketed by the Company in Europe, Russia and Turkey), declined 20% in 2020 driven by
ongoing biosimilar competition in the Company’s marketing territories in Europe. The Company lost market exclusivity for Remicade in major European markets
in 2015 and no longer has market exclusivity in any of its marketing territories. The Company is experiencing pricing and volume declines in these markets as a
result of biosimilar competition and expects the declines to continue.

The Company’s marketing rights with respect to these products will revert to Janssen Pharmaceuticals, Inc. in the second half of 2024.

Virology

($ in millions)

Isentress/Isentress HD
Zepatier

2020

% Change

$

857 
167 

(12) %
(55) %

% Change 
Excluding Foreign
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

(11) % $
(54) %

975 
370 

(15)%
(19)%

(10) % $
(16) %

2018

1,140 
455 

Worldwide sales of Isentress/Isentress HD, an HIV integrase inhibitor for use in combination with other antiretroviral agents for the treatment of HIV-1
infection,  declined  12%  in  2020  primarily  due  to  competitive  pressure  in  the  United  States  and  in  the  EU.  The  Company  expects  competitive  pressures  for
Isentress/Isentress HD to continue.

Global sales of Zepatier, a treatment for adult patients with chronic hepatitis C virus genotype (GT) 1 or GT4 infection, declined 55% in 2020 driven by

lower demand globally due to competition and declining patient volumes, coupled with the impact of the COVID-19 pandemic.

Cardiovascular

($ in millions)

2020

% Change

% Change 
Excluding Foreign
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

Zetia/Vytorin
Atozet
Rosuzet
Alliance revenue - Adempas 
Adempas

(1)

$

664 
453 
130 
281 
220 

(24) %
16  %
8  %
38  %
3  %

(24) % $
16  %
9  %
38  %
2  %

874 
391 
120 
204 
215 

(35)%
13 %
107 %
47 %
13 %

(34) % $
18  %
115  %
47  %
17  %

2018

1,355 
347 
58 
139 
190 

(1)

 Alliance revenue represents Merck’s share of profits from sales in Bayer’s marketing territories, which are product sales net of cost of sales and commercialization costs (see Note 4 to the
consolidated financial statements).

Combined global sales of Zetia (marketed in most countries outside the United States as  Ezetrol) and Vytorin (marketed outside the United States as
Inegy), medicines for lowering LDL cholesterol, declined 24% in 2020 driven primarily by lower sales of Ezetrol in Japan and  Ezetrol and Inegy in the EU. The
patent that provided market exclusivity for Ezetrol in Japan expired in September 2019 and generic competition began in June 2020. The

56

Table of Contents

EU patents for Ezetrol and Inegy expired in April 2018 and April 2019, respectively. Accordingly, the Company is experiencing sales declines in these markets as a
result of generic competition and expects the declines to continue. The sales decline in 2020 was also attributable to lower pricing following loss of exclusivity in
Australia. Higher demand for Ezetrol in China partially offset the sales decline in 2020. Merck lost market exclusivity in the United States for  Zetia in 2016 and
Vytorin in 2017 and subsequently lost nearly all U.S. sales of these products as a result of generic competition.

Sales  of  Atozet (marketed  outside  of  the  United  States),  a  medicine  for  lowering  LDL  cholesterol,  grew  16%  in  2020,  primarily  driven  by  higher

demand in most markets, particularly in the EU, Japan and other countries in the Asia Pacific region.

Zetia, Vytorin, Atozet and Rosuzet will be contributed to Organon in connection with the spin-off (see Note 1 to the consolidated financial statements).

Adempas, a cardiovascular drug for the treatment of pulmonary arterial hypertension, is part of a worldwide collaboration with Bayer to market and
develop soluble guanylate cyclase (sGC) modulators including Adempas (see Note 4 to the consolidated financial statements). Revenue from Adempas includes
Merck’s share of profits from the sale of Adempas in Bayer’s marketing territories, which grew 38% in 2020, as well as sales in Merck’s marketing territories,
which grew 3% in 2020.

In January 2021, the FDA approved Verquvo (vericiguat), an sGC stimulator, to reduce the risk of cardiovascular death and heart failure hospitalization
following  a  hospitalization  for  heart  failure  or  need  for  outpatient  intravenous  diuretics  in  adults  with  symptomatic  chronic  heart  failure  and  reduced  ejection
fraction.  The  approval  was  based  on  the  results  of  the  pivotal  Phase  3  VICTORIA  trial  and  follows  a  priority  regulatory  review.  Verquvo  is  part  of  the  same
worldwide clinical development collaboration with Bayer that includes Adempas referenced above.

Diabetes

($ in millions)

Januvia/Janumet

2020

% Change

% Change 
Excluding Foreign
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

2018

$

5,276 

(4) %

(4) % $

5,524 

(7) %

(4) % $

5,914 

Worldwide combined sales of Januvia and Janumet, medicines that help lower blood sugar levels in adults with type 2 diabetes, declined 4% in 2020 as
a result of continued pricing pressure in the United States, partially offset by higher demand in certain international markets, particularly in China. The Company
expects  U.S.  pricing  pressure  to  continue.  Januvia and  Janumet will  lose  market  exclusivity  in  the  United  States  in  January  2023.  The  supplementary  patent
certificates that provide market exclusivity for Januvia and Janumet in the EU expire in September 2022 and April 2023, respectively. The Company anticipates
sales of Januvia and Janumet in these markets will decline substantially after loss of market exclusivity.

Women’s Health 

($ in millions)

Implanon/Nexplanon
NuvaRing

2020

% Change

680 
236 

(14) %
(73) %

% Change 
Excluding
Foreign 
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

(13) %
(73) %

787 
879 

12  %
(3) %

14  %
(2) %

2018

703 
902 

Worldwide sales of Implanon/Nexplanon, a single-rod subdermal contraceptive implant, declined 14% in 2020, primarily driven by lower demand in

the United States and in the EU resulting from the COVID-19 pandemic.

Worldwide sales of NuvaRing, a vaginal contraceptive product, declined 73% in 2020 due to generic competition in the United States. The patent that
provided  U.S.  market  exclusivity  for  NuvaRing expired  in  April  2018  and  generic  competition  began  in  December  2019.  Accordingly,  the  Company  is
experiencing a rapid and substantial decline in U.S. NuvaRing sales and expects the decline to continue.

57

Table of Contents

Implanon/Nexplanon and NuvaRing will be contributed to Organon in connection with the spin-off (see Note 1 to the consolidated financial statements).

Biosimilars

($ in millions)

Biosimilars

* Calculation not meaningful.

2020

% Change

% Change 
Excluding Foreign 
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

2018

$

330 

31  %

31  % $

252 

*

* $

64 

Biosimilar products are marketed by the Company pursuant to an agreement with Samsung Bioepis Co., Ltd. (Samsung) to develop and commercialize
multiple pre-specified biosimilar candidates. Currently, the Company markets Renflexis (infliximab-abda), a biosimilar to Remicade (infliximab) for the treatment
of  certain  inflammatory  diseases;  Ontruzant  (trastuzumab-dttb),  a  biosimilar  to  Herceptin  (trastuzumab)  for  the  treatment  of  HER2-positive  breast  cancer  and
HER2  overexpressing  gastric  cancer;  Brenzys  (etanercept  biosimilar),  a  biosimilar  to  Enbrel  for  the  treatment  of  certain  inflammatory  diseases;  and  Aybintio
(bevacizumab) for the treatment of certain types of cancer. Merck’s commercialization territories under the agreement vary by product. Sales growth of biosimilars
in 2020 was primarily due to continued post-launch uptake of Renflexis in the United States and Canada and the launch of Ontruzant in Brazil in 2020.

In August 2020, the EC granted marketing authorization for Aybintio for the treatment of metastatic carcinoma of the colon or rectum, metastatic breast
cancer,  NSCLC,  advanced  and/or  metastatic  RCC,  epithelial  ovarian,  fallopian  tube  and  primary  peritoneal  cancer  and  cervical  cancer.  An  application  seeking
approval of Aybintio in the United States was filed in September 2019.

The above biosimilar products will be contributed to Organon in connection with the spin-off (see Note 1 to the consolidated financial statements).

Animal Health Segment

($ in millions)
Livestock
Companion Animal

2020

% Change

$

2,939 
1,764 

6  %
10  %

% Change 
Excluding Foreign 
Exchange

2019

% Change

% Change 
Excluding Foreign 
Exchange

9  % $
11  %

2,784 
1,609 

6  %
2  %

11  % $
5  %

2018

2,630 
1,582 

Sales of livestock products grew 6% in 2020 predominantly due to an additional five months of sales in 2020 related to the April 2019 acquisition of
Antelliq, a leader in digital animal identification, traceability and monitoring solutions (see Note 3 to the consolidated financial statements). Sales of companion
animal  products  grew  10%  in  2020  driven  primarily  by  higher  demand  for  the  Bravecto line  of  products  for  parasitic  control,  as  well  as  higher  demand  for
companion animal vaccines.

Costs, Expenses and Other
($ in millions)
Cost of sales
Selling, general and administrative
Research and development
Restructuring costs
Other (income) expense, net

* Calculation not meaningful.

2020

% Change

2019

% Change

2018

$

$

15,485 
10,468 
13,558 
578 
(886)
39,203 

10  % $
(1) %
37  %
(9) %
*
11  % $

14,112 
10,615 
9,872 
638 
139 
35,376 

4  % $
5  %
1  %
1  %
*
5  % $

13,509 
10,102 
9,752 
632 
(402)
33,593 

58

 
Table of Contents

Cost of Sales

Cost of sales was $15.5 billion in 2020 compared with $14.1 billion in 2019. Cost of sales includes the amortization of intangible assets recorded in
connection  with  acquisitions,  collaborations,  and  licensing  arrangements,  which  totaled  $1.8  billion  in  2020  compared  with  $2.0  billion  in  2019,  respectively.
Additionally,  costs  in  2020  and  2019  include  intangible  asset  impairment  charges  of  $1.6  billion  and  $705  million  related  to  marketed  products  and  other
intangibles (see Note 8 to the consolidated financial statements). The Company may recognize additional impairment charges in the future related to intangible
assets that were measured at fair value and capitalized in connection with business acquisitions and such charges could be material. Costs in 2020 also include a
charge of $260 million in connection with the discontinuation of COVID-19 vaccine development programs (see Note 3 to the consolidated financial statements)
and inventory write-offs of $120 million related to a recall for Zerbaxa (see Note 8 to the consolidated financial statements). Also included in cost of sales are
expenses associated with restructuring  activities which amounted to $175 million in 2020 compared with $251 million in 2019, primarily  reflecting accelerated
depreciation  and  asset  write-offs  related  to  the  planned  sale  or  closure  of  manufacturing  facilities.  Separation  costs  associated  with  manufacturing-related
headcount reductions have been incurred and are reflected in Restructuring costs as discussed below.

Gross margin was 67.7% in 2020 compared with 69.9% in 2019. The gross margin decline in 2020 reflects the unfavorable effects of higher impairment
charges  (noted  above),  pricing  pressure,  a  charge  related  to  the  discontinuation  of  COVID-19  vaccine  development  programs,  and  higher  inventory  write-offs
related  to  the  recall  of  Zerbaxa  (noted  above),  partially  offset  by  the  favorable  effects  of  product  mix,  lower  amortization  of  intangible  assets  and  lower
restructuring costs.

Selling, General and Administrative

Selling,  general  and  administrative  (SG&A)  expenses  were  $10.5  billion  in  2020,  a  decline  of  1%  compared  with  2019.  The  decline  was  driven
primarily by lower administrative, selling and promotional costs, including lower travel and meeting expenses, due in part to the COVID-19 pandemic, and the
favorable  effect  of  foreign  exchange,  partially  offset  by  higher  costs  related  to  the  spin-off  of  Organon  and  a  contribution  to  the  Merck  Foundation.  SG&A
expenses in 2020 include $710 million of costs related to the spin-off of Organon. SG&A expenses in 2020 and 2019 include restructuring costs of $47 million and
$34 million, respectively, related primarily to accelerated depreciation for facilities to be closed or divested. Separation costs associated with sales force reductions
have been incurred and are reflected in Restructuring costs as discussed below.

Research and Development

Research and development (R&D) expenses were $13.6 billion in 2020, an increase of 37% compared with 2019. The increase was driven primarily by
higher upfront payments related to acquisitions and collaborations, including a $2.7 billion charge in 2020 related to the acquisition of VelosBio (see Note 3 to the
consolidated  financial  statements),  as  well  as  higher  expenses  related  to  clinical  development  and  increased  investment  in  discovery  research  and  early  drug
development. Higher restructuring costs also contributed to the increase in R&D expenses in 2020. The increase in R&D expenses in 2020 was partially offset by
lower in-process research and development (IPR&D) impairment charges and lower costs resulting from the COVID-19 pandemic, net of spending on COVID-19-
related vaccine and antiviral research programs.

R&D expenses are comprised of the costs directly incurred by MRL, the Company’s research and development division that focuses on human health-
related activities, which were $6.6 billion in 2020 compared with $6.1 billion in 2019. Also included in R&D expenses are Animal Health research costs, licensing
costs and costs incurred by other divisions in support of R&D activities, including depreciation, production and general and administrative, which in the aggregate
were $2.7 billion in 2020 and $2.6 billion in 2019. Additionally, R&D expenses in 2020 include a $2.7 billion charge for the acquisition of VelosBio (noted above),
a $462 million charge for the acquisition of OncoImmune and charges of $826 million related to transactions with Seagen. R&D expenses in 2019 include a $993
million charge for the acquisition of Peloton. See Note 3 to the consolidated financial statements for more information on these transactions. R&D expenses also
include  IPR&D  impairment  charges  of  $90  million  and  $172  million  in  2020  and  2019,  respectively  (see  Note  8  to  the  consolidated  financial  statements).  The
Company may recognize additional impairment charges in the future related to the cancellation or delay of other pipeline programs that were measured at fair value
and capitalized in connection with business acquisitions and such

59

Table of Contents

charges could be material. In addition, R&D expenses in 2020 include $83 million of costs associated with restructuring activities, primarily relating to accelerated
depreciation. R&D expenses also include expense or income related to changes in the estimated fair value measurement of liabilities for contingent consideration
recorded  in  connection  with  business  acquisitions.  During  2020  and  2019,  the  Company  recorded  a  net  reduction  in  expenses  of  $95  million  and  $39  million,
respectively, related to changes in these estimates.

Restructuring Costs

In  early  2019,  Merck  approved  a  new  global  restructuring  program  (Restructuring  Program)  as  part  of  a  worldwide  initiative  focused  on  further
optimizing the Company’s manufacturing and supply network, as well as reducing its global real estate footprint. This program is a continuation of the Company’s
plant rationalization, builds on prior restructuring programs and does not include any actions associated with the planned spin-off of Organon. As the Company
continues  to  evaluate  its  global  footprint  and  overall  operating  model,  it  subsequently  identified  additional  actions  under  the  Restructuring  Program,  and  could
identify further actions over time. The actions currently contemplated under the Restructuring Program are expected to be substantially completed by the end of
2023, with the cumulative pretax costs to be incurred by the Company to implement the program now estimated to be approximately $3.0 billion. The Company
expects  to  record  charges  of  approximately  $700  million  in  2021  related  to  the  Restructuring  Program.  The  Company  anticipates  the  actions  under  the
Restructuring Program to result in annual net cost savings of approximately $900 million by the end of 2023. Actions under previous global restructuring programs
have been substantially completed.

Restructuring costs, primarily representing separation and other related costs associated with these restructuring activities, were $578 million in 2020
and  $638  million  in  2019.  Separation  costs  incurred  were  associated  with  actual  headcount  reductions,  as  well  as  estimated  expenses  under  existing  severance
programs for headcount reductions that were probable and could be reasonably estimated. Also included in restructuring costs are asset abandonment, facility shut-
down  and  other  related  costs,  as  well  as  employee-related  costs  such  as  curtailment,  settlement  and  termination  charges  associated  with  pension  and  other
postretirement benefit plans and share-based compensation plan costs. For segment reporting, restructuring costs are unallocated expenses.

Additional costs associated with the Company’s restructuring activities are included in Cost of sales, Selling, general and administrative expenses and
Research and development costs. The Company recorded aggregate pretax costs of $883 million in 2020 and $927 million in 2019 related to restructuring program
activities (see Note 5 to the consolidated financial statements).

Other (Income) Expense, Net

Other (income) expense, net, was $886 million of income in 2020 compared with $139 million of expense in 2019, primarily due to higher income from
investments in equity securities, net, largely related to Moderna, Inc. For details on the components of Other (income) expense, net, see Note 14 to the consolidated
financial statements.

Segment Profits

($ in millions)
Pharmaceutical segment profits
Animal Health segment profits
Other non-reportable segment profits
Other
Income Before Taxes

2020

2019

2018

$

$

29,722  $
1,650 
1 
(22,582)

8,791  $

28,324  $
1,609 
(7)
(18,462)
11,464  $

24,871 
1,659 
103 
(17,932)
8,701 

Pharmaceutical segment profits are comprised of segment sales less standard costs, as well as SG&A expenses directly incurred by the segment. Animal
Health segment profits are comprised of segment sales, less all cost of sales, as well as SG&A and R&D expenses directly incurred by the segment. For internal
management  reporting  presented  to  the  chief  operating  decision  maker,  Merck  does  not  allocate  the  remaining  cost  of  sales  not  included  in  segment  profits  as
described above, research and development expenses incurred by MRL, or general and administrative expenses, nor the cost of financing these activities. Separate
divisions maintain responsibility for

60

Table of Contents

monitoring  and  managing  these  costs,  including  depreciation  related  to  fixed  assets  utilized  by  these  divisions  and,  therefore,  they  are  not  included  in  segment
profits. Also excluded from the determination of segment profits are costs related to restructuring activities and acquisition and divestiture-related costs, including
the amortization of purchase accounting adjustments, intangible asset impairment charges, and changes in the estimated fair value measurement of liabilities for
contingent  consideration.  Additionally,  segment  profits  do  not  reflect  other  expenses  from  corporate  and  manufacturing  cost  centers  and  other  miscellaneous
income or expense. These unallocated items are reflected in “Other” in the above table. Also included in “Other” are miscellaneous corporate profits (losses), as
well as operating profits (losses) related to third-party manufacturing sales.

Pharmaceutical segment profits grew 5% in 2020 compared with 2019 driven primarily by higher sales, as well as lower selling and promotional costs.
Animal Health segment profits grew 3% in 2020 driven primarily by higher sales and lower promotional and selling costs, partially offset by higher R&D costs and
the unfavorable effect of foreign exchange.

Taxes on Income

The effective income tax rates of 19.4% in 2020 and 14.7% in 2019 reflect the impacts of acquisition and divestiture-related costs and restructuring
costs, partially offset by the beneficial impact of foreign earnings, including product mix. The effective income tax rate in 2020 reflects the unfavorable impact of a
charge  for  the  acquisition  of  VelosBio  for  which  no  tax  benefit  was  recognized.  The  effective  income  tax  rate  in  2019  reflects  the  favorable  impact  of  a  $364
million net tax benefit related to the settlement of certain federal income tax matters (see Note 15 to the consolidated financial statements) and the reversal of tax
reserves established in connection with the 2014 divestiture of Merck’s Consumer Care (MCC) business due to the lapse in the statute of limitations. In addition,
the effective income tax rate in 2019 reflects the unfavorable impacts of a charge for the acquisition of Peloton for which no tax benefit was recognized and charges
of $117 million related to the finalization of treasury regulations for the transition tax associated with the 2017 enactment of U.S. tax legislation known as the Tax
Cuts and Jobs Act (TCJA) (see Note 15 to the consolidated financial statements).

Net Income (Loss) Attributable to Noncontrolling Interests

Net income (loss) attributable to noncontrolling interests was $15 million in 2020 compared with $(66) million in 2019. The loss in 2019 was driven
primarily by the portion of goodwill impairment charges related to certain businesses in the Healthcare Services segment that were attributable to noncontrolling
interests.

Net Income and Earnings per Common Share

Net income attributable to Merck & Co., Inc. was $7.1 billion in 2020 and $9.8 billion in 2019. EPS was $2.78 in 2020 and $3.81 in 2019.

Non-GAAP Income and Non-GAAP EPS

Non-GAAP income and non-GAAP EPS are alternative views of the Company’s performance that Merck is providing because management believes
this information enhances investors’ understanding of the Company’s results as it permits investors to understand how management assesses performance. Non-
GAAP income and non-GAAP EPS exclude certain items because of the nature of these items and the impact that they have on the analysis of underlying business
performance and trends. The excluded items (which should not be considered non-recurring) consist of acquisition and divestiture-related costs, restructuring costs
and certain other items. These excluded items are significant components in understanding and assessing financial performance.

Non-GAAP  income  and  non-GAAP  EPS  are  important  internal  measures  for  the  Company.  Senior  management  receives  a  monthly  analysis  of
operating results that includes non-GAAP EPS. Management uses these measures internally for planning and forecasting purposes and to measure the performance
of the Company along with other metrics. In addition, senior management’s annual compensation is derived in part using non-GAAP pretax income. Since non-
GAAP  income  and  non-GAAP  EPS  are  not  measures  determined  in  accordance  with  GAAP,  they  have  no  standardized  meaning  prescribed  by  GAAP  and,
therefore, may not be comparable to the calculation of similar measures of other companies. The information on non-GAAP income and non-GAAP EPS should be
considered in addition to, but not as a substitute for or superior to, net income and EPS prepared in accordance with generally accepted accounting principles in the
United States (GAAP).

61

Table of Contents

A reconciliation between GAAP financial measures and non-GAAP financial measures is as follows:

($ in millions except per share amounts)
Income before taxes as reported under GAAP
Increase (decrease) for excluded items:

Acquisition and divestiture-related costs 
Restructuring costs
Other items:

(1)

(2)

Charge for the acquisition of VelosBio
Charges for the formation of collaborations 
Charge for the acquisition of OncoImmune
Charge for the discontinuation of COVID-19 vaccine development programs
Charge for the acquisition of Peloton
Charge related to the termination of a collaboration with Samsung
Charge for the acquisition of Viralytics Limited
Other

Non-GAAP income before taxes
Taxes on income as reported under GAAP
Estimated tax benefit on excluded items 
Adjustment to tax benefits recorded in conjunction with the 2015 Cubist Pharmaceuticals, Inc. acquisition
Net tax benefit from the settlement of certain federal income tax matters
Tax benefit from the reversal of tax reserves related to the divestiture of MCC
Net tax charge related to the finalization of treasury regulations related to the enactment of the TCJA

(3)

Non-GAAP taxes on income
Non-GAAP net income
Less: Net income (loss) attributable to noncontrolling interests as reported under GAAP
Acquisition and divestiture-related costs attributable to noncontrolling interests

Non-GAAP net income attributable to noncontrolling interests
Non-GAAP net income attributable to Merck & Co., Inc.

EPS assuming dilution as reported under GAAP
EPS difference
Non-GAAP EPS assuming dilution

2020

2019

2018

$

8,791  $

11,464  $

8,701 

3,704 
883 

2,681 
927 

2,660 
1,076 
462 
305 
— 
— 
— 
(20)
17,861 
1,709 
1,122 
(67)
— 
— 
— 
2,764 
15,097 
15 
— 
15 
15,082  $

2.78  $
3.16 
5.94  $

— 
— 
— 
— 
993 
— 
— 
55 
16,120 
1,687 
695 
— 
364 
86 
(117)
2,715 
13,405 
(66)
(89)
23 
13,382  $

3.81  $
1.38 
5.19  $

3,066 
658 

— 
1,400 
— 
— 
— 
423 
344 
(57)
14,535 
2,508 
535 
— 
— 
— 
(160)
2,883 
11,652 
(27)
(58)
31 
11,621 

2.32 
2.02 
4.34 

$

$

$

(1)

(2)

Amount  in  2020  includes  a  $1.6  billion  intangible  asset  impairment  charge  related  to  Zerbaxa.  Amount  in  2019  includes  a  $612  million  intangible  asset  impairment  charge  related  to
Sivextro. See Note 8 to the consolidated financial statements.

Amount in 2020 includes $826 million related to transactions with Seagen (see Note 3 to the consolidated financial statements). Amount in 2018 represents charge for the formation of a
collaboration with Eisai (see Note 4 to the consolidated financial statements).

(3)

 The estimated tax impact on the excluded items is determined by applying the statutory rate of the originating territory of the non-GAAP adjustments.

Acquisition and Divestiture-Related Costs

Non-GAAP  income  and  non-GAAP  EPS  exclude  the  impact  of  certain  amounts  recorded  in  connection  with  business  acquisitions  and  divestitures.
These  amounts  include  the  amortization  of  intangible  assets  and  amortization  of  purchase  accounting  adjustments  to  inventories,  as  well  as  intangible  asset
impairment charges and expense or income related to changes in the estimated fair value measurement of liabilities for contingent consideration. Also excluded are
integration, transaction, and certain other costs associated with business acquisitions and divestitures.

Restructuring Costs

Non-GAAP  income  and  non-GAAP  EPS  exclude  costs  related  to  restructuring  actions  (see  Note  5  to  the  consolidated  financial  statements).  These

amounts include employee separation costs and accelerated depreciation

62

Table of Contents

associated with facilities to be closed or divested. Accelerated depreciation costs represent the difference between the depreciation expense to be recognized over
the revised useful life of the asset, based upon the anticipated date the site will be closed or divested or the equipment disposed of, and depreciation expense as
determined utilizing the useful life prior to the restructuring actions. Restructuring costs also include asset abandonment, facility shut-down and other related costs,
as well as employee-related costs such as curtailment, settlement and termination charges associated with pension and other postretirement benefit plans and share-
based compensation costs.

Certain Other Items

These items are adjusted for after evaluating them on an individual basis considering their quantitative and qualitative aspects. Typically, these consist
of items that are unusual in nature, significant to the results of a particular period or not indicative of future operating results. Excluded from non-GAAP income
and non-GAAP EPS in 2020 are charges for the acquisitions of VelosBio and OncoImmune, charges related to collaborations, including transactions with Seagen
(see  Note  3  to  the  consolidated  financial  statements),  a  charge  for  the  discontinuation  of  COVID-19  vaccine  development  programs,  and  an  adjustment  to  tax
benefits  recorded  in  conjunction  with  the  2015  Cubist  Pharmaceuticals,  Inc.  acquisition.  Excluded  from  non-GAAP  income  and  non-GAAP  EPS  in  2019  is  a
charge for the acquisition of Peloton (see Note 3 to the consolidated financial statements), tax charges related to the finalization of U.S. treasury regulations related
to the TCJA, a net tax benefit related to the settlement of certain federal income tax matters, and a tax benefit related to the reversal of tax reserves established in
connection with the 2014 divestiture of MCC (see Note 15 to the consolidated financial statements). Excluded from non-GAAP income and non-GAAP EPS in
2018 is a charge related to the formation of a collaboration with Eisai (see Note 4 to the consolidated financial statements), a charge related to the termination of a
collaboration agreement with Samsung for insulin glargine (see Note 3 to the consolidated financial statements), a charge for the acquisition of Viralytics (see Note
3  to  the  consolidated  financial  statements),  and  measurement-period  adjustments  related  to  the  provisional  amounts  recorded  for  the  TCJA  (see  Note  15  to  the
consolidated financial statements).

Beginning in 2021, the Company will be changing the treatment of certain items for the purposes of its non-GAAP reporting. Historically, Merck’s non-
GAAP results excluded the amortization of intangible assets recognized in connection with business acquisitions (reflected as part of acquisition and divestiture-
related costs) but did not exclude the amortization of intangibles originating from collaborations, asset acquisitions or licensing arrangements. Beginning in 2021,
Merck’s non-GAAP results will no longer differentiate between the nature of the intangible assets being amortized and will exclude all amortization of intangible
assets. Also, beginning in 2021, Merck’s non-GAAP results will exclude gains and losses on investments in equity securities. Prior period amounts will be recast to
conform to the new presentation.

Research and Development

Research Pipeline

The  Company  currently  has  several  candidates  under  regulatory  review  in  the  United  States  and  internationally,  as  well  as  in  late-stage  clinical
development.  A  chart  reflecting  the  Company’s  current  research  pipeline  as  of  February  22,  2021  and  related  discussion  is  set  forth  in  Item  1.  “Business —
Research and Development” above.

Acquired In-Process Research and Development

In connection with business acquisitions, the Company has recorded the fair value of in-process research projects which, at the time of acquisition, had

not yet reached technological feasibility. At December 31, 2020, the balance of IPR&D was $3.2 billion (see Note 8 to the consolidated financial statements).

The  IPR&D  projects  that  remain  in  development  are  subject  to  the  inherent  risks  and  uncertainties  in  drug  development  and  it  is  possible  that  the
Company will not be able to successfully develop and complete the IPR&D programs and profitably commercialize the underlying product candidates. The time
periods to receive approvals from the FDA and other regulatory agencies are subject to uncertainty. Significant delays in the approval process, or the Company’s
failure to obtain approval at all, would delay or prevent the Company from realizing revenues from these products. Additionally, if certain of the IPR&D programs
fail or are abandoned during development, then the Company will not realize the future cash flows it has estimated and recorded as IPR&D as of

63

Table of Contents

the  acquisition  date.  If  such  circumstances  were  to  occur,  the  Company’s  future  operating  results  could  be  adversely  affected  and  the  Company  may  recognize
impairment charges and such charges could be material.

In 2020, 2019, and 2018 the Company recorded IPR&D impairment charges within Research and development expenses of $90 million, $172 million

and $152 million, respectively (see Note 8 to the consolidated financial statements).

Additional research and development will be required before any of the remaining programs reach technological feasibility. The costs to complete the
research projects will depend on whether the projects are brought to their final stages of development and are ultimately submitted to the FDA or other regulatory
agencies for approval.

Acquisitions, Research Collaborations and License Agreements

Merck  continues  to  remain  focused  on  pursuing  opportunities  that  have  the  potential  to  drive  both  near-  and  long-term  growth.  Certain  recent
transactions are summarized below; additional details are included in Note 3 to the consolidated financial statements. Merck is actively monitoring the landscape
for growth opportunities that meet the Company’s strategic criteria.

In January 2020, Merck acquired ArQule, a publicly traded biopharmaceutical company focused on kinase inhibitor discovery and development for the
treatment  of  patients  with  cancer  and  other  diseases  for  $2.7  billion.  ArQule’s  lead  investigational  candidate,  MK-1026  (formerly  ARQ  531),  is  a  novel,  oral
Bruton’s tyrosine kinase (BTK) inhibitor currently being evaluated for the treatment of B-cell malignancies. The transaction was accounted for as an acquisition of
a business. The Company recorded IPR&D of $2.3 billion (related to MK-1026), goodwill of $512 million and other net liabilities of $102 million.

In July 2020, Merck and Ridgeback Bio, a closely held biotechnology company, closed a collaboration agreement to develop molnupiravir (MK-4482,
also known as EIDD-2801), an orally available antiviral candidate in clinical development for the treatment of patients with COVID-19. Merck gained exclusive
worldwide rights to develop and commercialize molnupiravir and related molecules. Under the terms of the agreement, Ridgeback Bio received an upfront payment
and also is eligible to receive future contingent payments dependent upon the achievement of certain developmental and regulatory approval milestones, as well as
a  share  of  the  net  profits  of  molnupiravir  and  related  molecules,  if  approved.  Molnupiravir  is  currently  being  evaluated  in  Phase  2/3  clinical  trials  in  both  the
hospital and outpatient settings. The primary completion date for the Phase 2/3 studies is June 2021. The Company anticipates interim efficacy data in the first
quarter of 2021.

In September 2020, Merck and Seagen announced an oncology collaboration to globally develop and commercialize Seagen’s ladiratuzumab vedotin
(MK-6440), an investigational antibody-drug conjugate targeting LIV-1, which is currently in Phase 2 clinical trials for breast cancer and other solid tumors. Under
the terms of the agreement, Merck made an upfront payment of $600 million and a $1.0 billion equity investment in 5 million shares of Seagen common stock at a
price of $200 per share. Merck recorded $616 million in Research and development expenses in 2020 related to this transaction. Seagen is also eligible to receive
future contingent milestone payments dependent upon the achievement of certain developmental and sales-based milestones.

Concurrent  with  the  above  transaction,  Seagen  granted  Merck  an  exclusive  license  to  commercialize  Tukysa  (tucatinib),  a  small  molecule  tyrosine
kinase inhibitor, for the treatment of HER2-positive cancers, in Asia, the Middle East and Latin America and other regions outside of the United States, Canada and
Europe. Under the terms of the agreement, Merck made upfront payments aggregating $210 million, which were recorded as Research and development expenses
in 2020. Seagen is also eligible to receive future contingent regulatory approval milestones and tiered royalties based on annual sales levels of Tukysa in Merck’s
territories.

In December 2020, Merck acquired OncoImmune, a privately held, clinical-stage biopharmaceutical company, for an upfront payment of $423 million.
In addition, OncoImmune shareholders will be eligible to receive future contingent regulatory approval milestone payments and tiered royalties. OncoImmune’s
lead therapeutic candidate MK-7110 (also known as CD24Fc) is being evaluated for the treatment of patients hospitalized with COVID-19. Topline results from a
pre-planned  interim  efficacy  analysis  from  a  Phase  3  study  of  MK-7110  were  released  in  September  2020.  Full  results  from  this  Phase  3  study,  which  were
consistent with the topline results, were received in February 2021 and will be submitted for publication in the future. The transaction was accounted

64

Table of Contents

for as an acquisition of an asset. Under the agreement, prior to the completion of the acquisition, OncoImmune spun-out certain rights and assets unrelated to the
MK-7110  program  to  a  new  entity  owned  by  the  existing  shareholders  of  OncoImmune.  In  connection  with  the  closing  of  the  acquisition,  Merck  invested
$50 million for a 20% ownership interest in the new entity, which was valued at $33 million resulting in a $17 million premium. Merck also recognized other net
liabilities of $22 million. The Company recorded Research and development expenses of $462 million in 2020 related to this transaction.

In December 2020, Merck announced it had entered into an agreement with the U.S. Government to support the development, manufacture and initial
distribution of MK-7110 upon approval or Emergency Use Authorization (EUA) from the FDA by June 30, 2021. Under the agreement, Merck was to receive up to
approximately $356 million for manufacturing and supply of approximately 60,000-100,000 doses of MK-7110 to the U.S. government by June 30, 2021 to help
meet the government’s pandemic response goals. Following the execution of this agreement, Merck received feedback from the FDA that additional data, beyond
the study conducted by OncoImmune, would be needed to support a potential EUA application. Based on this FDA feedback, Merck no longer expects to supply
the U.S. government with MK-7110 in the first half of 2021. Merck is actively working with FDA to address the agency’s comments.

In  December  2020,  Merck  acquired  VelosBio,  a  privately  held  clinical-stage  biopharmaceutical  company,  for  $2.8  billion.  VelosBio’s  lead
investigational candidate is MK-2140 (formerly known as VLS-101), an antibody-drug conjugate targeting receptor tyrosine kinase-like orphan receptor 1 (ROR1)
that is currently being evaluated for the treatment of patients with hematologic malignancies and solid tumors. The transaction was accounted for as an acquisition
of an asset. Merck recorded net assets of $180 million (primarily cash) and Research and development expenses of $2.7 billion in 2020 related to the transaction.

In  February  2021,  Merck  and  Pandion  Therapeutics,  Inc.  (Pandion)  entered  into  a  definitive  agreement  under  which  Merck  will  acquire  Pandion,  a
clinical-stage biotechnology company developing novel therapeutics designed to address the unmet needs of patients living with autoimmune diseases, for $60 per
share in cash representing an approximate total equity value of $1.85 billion. Pandion is advancing a pipeline of precision immune modulators targeting critical
immune control nodes. Under the terms of the acquisition agreement, Merck, through a subsidiary, will initiate a tender offer to acquire all outstanding shares of
Pandion.  The  closing  of  the  tender  offer  is  subject  to  certain  conditions,  including  the  tender  of  shares  representing  at  least  a  majority  of  the  total  number  of
Pandion’s shares of fully-diluted common stock, the expiration of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act and other customary
conditions. The transaction is expected to close in the first half of 2021.

Capital Expenditures

Capital expenditures were $4.7 billion in 2020, $3.5 billion in 2019 and $2.6 billion in 2018. Expenditures in the United States were $2.7 billion in
2020,  $1.9  billion  in  2019  and  $1.5  billion  in  2018.  The  increased  capital  expenditures  in  2020  and  2019  reflect  investment  in  new  capital  projects  focused
primarily on increasing manufacturing capacity for Merck’s key products. The increased capital expenditures in 2020 also reflect the purchase of a manufacturing
facility in Dunboyne, Ireland to support upcoming product launches (see Note 3 to the consolidated financial statements). The Company plans to invest more than
$20 billion in new capital projects from 2020-2024.

Depreciation expense was $1.7 billion in 2020, $1.7 billion in 2019 and $1.4 billion in 2018, of which $1.2 billion in 2020, $1.2 billion in 2019 and
$1.0 billion in 2018, related to locations in the United States. Total depreciation expense in 2020 and 2019 included accelerated depreciation of $268 million and
$233 million, respectively, associated with restructuring activities (see Note 5 to the consolidated financial statements).

65

Table of Contents

Analysis of Liquidity and Capital Resources

Merck’s  strong  financial  profile  enables  it  to  fund  research  and  development,  focus  on  external  alliances,  support  in-line  products  and  maximize

upcoming launches while providing significant cash returns to shareholders.
Selected Data
($ in millions)
Working capital
Total debt to total liabilities and equity
Cash provided by operations to total debt

2020

2019

2018

$

$

437 
34.7 %
0.3:1

$

5,263 
31.2 %
0.5:1

3,669 
30.4 %
0.4:1

The  decline  in  working  capital  in  2020  compared  with  2019  is  primarily  related  to  increased  short-term  debt  supporting  the  funding  of  business

development activities and capital expenditures.

Cash  provided  by  operating  activities  was  $10.3  billion  in  2020  compared  with  $13.4  billion  in  2019,  reflecting  higher  payments  related  to
collaborations which were $2.9 billion in 2020 compared with $805 million in 2019. Cash provided by operating activities continues to be the Company’s primary
source of funds to finance operating needs, capital expenditures, treasury stock purchases and dividends paid to shareholders.

Cash used in investing activities was $9.4 billion in 2020 compared with $2.6 billion in 2019. The increase was driven primarily by lower proceeds
from  the  sales  of  securities  and  other  investments,  higher  use  of  cash  for  acquisitions  and  higher  capital  expenditures,  partially  offset  by  lower  purchases  of
securities and other investments.

Cash used in financing activities was $2.8 billion in 2020 compared with $8.9 billion in 2019. The lower use of cash in financing activities was driven
primarily by a net increase in short-term borrowings in 2020 compared with a net decrease in short-term borrowing in 2019, as well as lower purchases of treasury
stock, partially offset by higher payments on debt (see below), lower proceeds from the issuance of debt (see below), higher dividends paid to shareholders and
lower proceeds from the exercise of stock options.

The Company has accounts receivable factoring agreements with financial institutions in certain countries to sell accounts receivable (see Note 6 to the
consolidated financial statements). The Company factored $2.3 billion and $2.7 billion of accounts receivable in the fourth quarter of 2020 and 2019, respectively,
under these factoring arrangements, which reduced outstanding accounts receivable. The cash received from the financial institutions is reported within operating
activities in the Consolidated Statement of Cash Flows. In certain of these factoring arrangements, for ease of administration, the Company will collect customer
payments related to the factored receivables, which it then remits to the financial institutions. At December 31, 2020 and 2019 the Company had collected $102
million and $256 million, respectively, on behalf of the financial institutions, which was remitted to them in January 2021 and 2020, respectively. The net cash
flows from these collections are reported as financing activities in the Consolidated Statement of Cash Flows.

66

Table of Contents

The Company’s contractual obligations as of December 31, 2020 are as follows:

(1)

Payments Due by Period
($ in millions)
Purchase obligations 
Loans payable and current portion of long-term debt
Long-term debt
Interest related to debt obligations
Unrecognized tax benefits 
Transition tax related to the enactment of the TCJA 
Milestone payments related to collaborations 
Leases 

(4)

(5)

(2)

(3)

Total

2021

2022—2023

2024—2025

Thereafter

3,458  $
6,432 
25,437 
10,779 
305 
3,006 
200 
1,778 
51,395  $

$

977 
6,432 
— 
759 
305 
390 
200 
335 
9,398  $

1,232 
— 
4,000 
1,431 
— 
736 
— 
521 
7,920 

$

$

668 
— 
3,863 
1,254 
— 
1,880 
— 
342 
8,007 

$

$

581 
— 
17,574 
7,335 
— 
— 
— 
580 
26,070 

$

$

(1)     

Includes future inventory purchases the Company has committed to in connection with certain divestitures.

(2)     

As of December 31, 2020, the Company’s Consolidated Balance Sheet reflects liabilities for unrecognized tax benefits, including interest and penalties, of $1.8 billion, including $305 million reflected as a
current liability. Due to the high degree of uncertainty regarding the timing of future cash outflows of liabilities for unrecognized tax benefits beyond one year, a reasonable estimate of the period of cash
settlement for years beyond 2021 cannot be made.

(3)     

In connection with the enactment of the TCJA, the Company is required to pay a one-time transition tax, which the Company has elected to pay over a period of eight years through 2025 as permitted under the
TCJA (see Note 15 to the consolidated financial statements).

(4)         

Reflects  payments  under  collaborative  agreements  for  sales-based  milestones  that  were  achieved  in  2020  (and  therefore  deemed  to  be  contractual  obligations)  but  not  paid  until  2021  (see  Note  4  to  the

consolidated financial statements).

(5) 

Amounts exclude reasonably certain lease renewals that have not yet been executed (see Note 9 to the consolidated financial statements).

Purchase  obligations  are  enforceable  and  legally  binding  obligations  for  purchases  of  goods  and  services  including  minimum  inventory  contracts,
research and development and advertising. Amounts do not include contingent milestone payments related to collaborative arrangements or acquisitions as they are
not considered contractual obligations until the successful achievement of developmental, regulatory approval or commercial milestones. At December 31, 2020,
the Company has recognized liabilities for contingent sales-based milestone payments related to collaborations with AstraZeneca and Eisai where payment remains
subject to the achievement of the related sales milestone aggregating $1.0 billion (see Note 4 to the consolidated financial statements). Excluded from research and
development  obligations  are potential  future funding commitments  of up to approximately  $52 million  for investments  in research  venture  capital  funds. Loans
payable and current portion of long-term debt reflects $73 million of long-dated notes that are subject to repayment at the option of the holders. Required funding
obligations for 2021 relating to the Company’s pension and other postretirement benefit plans are not expected to be material. However, the Company currently
anticipates  contributing  approximately  $300  million  to  its  U.S.  pension  plans,  $170  million  to  its  international  pension  plans  and  $35  million  to  its  other
postretirement benefit plans during 2021.

In  June  2020,  the  Company  issued  $4.5  billion  principal  amount  of  senior  unsecured  notes  consisting  of  $1.0  billion  of  0.75%  notes  due  2026,
$1.25 billion of 1.45% notes due 2030, $1.0 billion of 2.35% notes due 2040 and $1.25 billion of 2.45% notes due 2050. Merck used the net proceeds from the
offering  for  general  corporate  purposes,  including  without  limitation  the  repayment  of  outstanding  commercial  paper  borrowings  and  other  indebtedness  with
upcoming maturities.

In March 2019, the Company issued $5.0 billion principal amount of senior unsecured notes consisting of $750 million of 2.90% notes due 2024, $1.75
billion of 3.40% notes due 2029, $1.0 billion of 3.90% notes due 2039, and $1.5 billion of 4.00% notes due 2049. The Company used the net proceeds from the
offering for general corporate purposes, including the repayment of outstanding commercial paper borrowings.

The Company has a $6.0 billion credit facility that matures in June 2024. The facility provides backup liquidity for the Company’s commercial paper

borrowing facility and is to be used for general corporate purposes. The Company has not drawn funding from this facility.

67

 
Table of Contents

In March 2018, the Company filed a securities registration statement with the U.S. Securities and Exchange Commission (SEC) under the automatic

shelf registration process available to “well-known seasoned issuers” which is effective for three years.

Effective as of November 3, 2009, the Company executed a full and unconditional guarantee of the then existing debt of its subsidiary Merck Sharp &
Dohme Corp. (MSD) and MSD executed a full and unconditional guarantee of the then existing debt of the Company (excluding commercial paper), including for
payments of principal and interest. These guarantees do not extend to debt issued subsequent to that date.

The Company continues to maintain a conservative financial profile. The Company places its cash and investments in instruments that meet high credit
quality standards, as specified in its investment policy guidelines. These guidelines also limit the amount of credit exposure to any one issuer. The Company does
not  participate  in  any  off-balance  sheet  arrangements  involving  unconsolidated  subsidiaries  that  provide  financing  or  potentially  expose  the  Company  to
unrecorded financial obligations.

In November 2020, Merck’s Board of Directors declared a quarterly dividend of $0.65 per share on the Company’s outstanding common stock that was
paid in January 2021. In January 2021, the Board of Directors declared a quarterly dividend of $0.65 per share on the Company’s common stock for the second
quarter of 2021 payable in April 2021.

In October 2018, Merck’s Board of Directors authorized purchases of up to $10 billion of Merck’s common stock for its treasury. The treasury stock
purchase  authorization  has  no  time  limit  and  will  be  made  over  time  in  open-market  transactions,  block  transactions,  on  or  off  an  exchange,  or  in  privately
negotiated transactions. The Company spent $1.3 billion to purchase 16 million shares of its common stock for its treasury during 2020 under this program. In
March  2020,  the  Company  temporarily  suspended  its  share  repurchase  program.  As  of  December  31,  2020,  the  Company’s  remaining  share  repurchase
authorization was $5.9 billion. The Company purchased $4.8 billion and $9.1 billion of its common stock during 2019 and 2018, respectively, under authorized
share repurchase programs.

In 2018, the Company entered into accelerated share repurchase (ASR) agreements with two third-party financial institutions (the Dealers). Under the
ASR agreements, Merck agreed to purchase $5 billion of Merck’s common stock, in total, with an initial delivery of 56.7 million shares of Merck’s common stock,
based on the then-current market price, made by the Dealers to Merck, and payments of $5 billion made by Merck to the Dealers in 2018, which were funded with
existing cash and investments, as well as short-term borrowings. Upon settlement of the ASR agreements in 2019, Merck received an additional 7.7 million shares
as determined  by the average  daily volume weighted-average  price of Merck’s  common stock during the term  of the ASR program, less a negotiated  discount,
bringing the total shares received by Merck under this program to 64.4 million.

Financial Instruments Market Risk Disclosures

The Company manages the impact of foreign exchange rate movements and interest rate movements on its earnings, cash flows and fair values of assets

and liabilities through operational means and through the use of various financial instruments, including derivative instruments.

A significant portion of the Company’s revenues and earnings in foreign affiliates is exposed to changes in foreign exchange rates. The objectives of the

Company’s foreign currency risk management program, as well as its interest rate risk management activities are discussed below.

Foreign Currency Risk Management

The Company has established revenue hedging, balance sheet risk management, and net investment hedging programs to protect against volatility of

future foreign currency cash flows and changes in fair value caused by changes in foreign exchange rates.

The objective of the revenue hedging program is to reduce the variability caused by changes in foreign exchange rates that would affect the U.S. dollar
value of future cash flows derived from foreign currency denominated sales, primarily the euro, Japanese yen and Chinese renminbi. To achieve this objective, the
Company  will  hedge  a  portion  of  its  forecasted  foreign  currency  denominated  third-party  and  intercompany  distributor  entity  sales  (forecasted  sales)  that  are
expected to occur over its planning cycle, typically no more than two years into the

68

Table of Contents

future. The Company will layer in hedges over time, increasing the portion of forecasted sales hedged as it gets closer to the expected date of the forecasted sales.
The  portion  of  forecasted  sales  hedged  is  based  on  assessments  of  cost-benefit  profiles  that  consider  natural  offsetting  exposures,  revenue  and  exchange  rate
volatilities  and  correlations,  and  the  cost  of  hedging  instruments.  The  Company  manages  its  anticipated  transaction  exposure  principally  with  purchased  local
currency put options, forward contracts, and purchased collar options.

The  fair  values  of  these  derivative  contracts  are  recorded  as  either  assets  (gain  positions)  or  liabilities  (loss  positions)  in  the  Consolidated  Balance
Sheet.  Changes  in  the  fair  value  of  derivative  contracts  are  recorded  each  period  in  either  current  earnings  or  Other  Comprehensive  Income  (Loss)  (OCI),
depending on whether the derivative is designated as part of a hedge transaction and, if so, the type of hedge transaction. For derivatives that are designated as cash
flow hedges, the unrealized gains or losses on these contracts are recorded in Accumulated Other Comprehensive Income (Loss) (AOCI) and reclassified into Sales
when the hedged anticipated revenue is recognized. For those derivatives which are not designated as cash flow hedges, but serve as economic hedges of forecasted
sales, unrealized gains or losses are recorded in Sales each period. The cash flows from both designated and non-designated contracts are reported as operating
activities in the Consolidated Statement of Cash Flows. The Company does not enter into derivatives for trading or speculative purposes.

Because Merck principally sells foreign currency in its revenue hedging program, a uniform weakening of the U.S. dollar would yield the largest overall
potential loss in the market value of these hedge instruments. The market value of Merck’s hedges would have declined by an estimated $593 million and $456
million  at  December  31,  2020  and  2019,  respectively,  from  a  uniform  10%  weakening  of  the  U.S.  dollar.  The  market  value  was  determined  using  a  foreign
exchange  option  pricing  model  and  holding  all  factors  except  exchange  rates  constant.  Although  not  predictive  in  nature,  the  Company  believes  that  a  10%
threshold reflects reasonably possible near-term changes in Merck’s major foreign currency exposures relative to the U.S. dollar.

The Company manages operating activities  and net asset positions at each local subsidiary in order to mitigate  the effects of exchange on monetary
assets and liabilities. The Company also uses a balance sheet risk management program to mitigate the exposure of net monetary assets that are denominated in a
currency  other  than  a  subsidiary’s  functional  currency  from  the  effects  of  volatility  in  foreign  exchange.  In  these  instances,  Merck  principally  utilizes  forward
exchange  contracts  to  offset  the  effects  of  exchange  on  exposures  denominated  in  developed  country  currencies,  primarily  the  euro  and  Japanese  yen.  For
exposures  in  developing  country  currencies,  the  Company  will  enter  into  forward  contracts  to  partially  offset  the  effects  of  exchange  on  exposures  when  it  is
deemed economical to do so based on a cost-benefit analysis that considers the magnitude of the exposure, the volatility of the exchange rate and the cost of the
hedging instrument. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash Flows.

A  sensitivity  analysis  to  changes  in  the  value  of  the  U.S.  dollar  on  foreign  currency  denominated  derivatives,  investments  and  monetary  assets  and
liabilities indicated that if the U.S. dollar uniformly weakened by 10% against all currency exposures of the Company at December 31, 2020 and 2019, Income
before  taxes would  have  declined  by  approximately  $99  million  and  $110  million  in  2020  and  2019,  respectively.  Because  the  Company  was  in  a  net  short
(payable) position relative to its major foreign currencies after consideration of forward contracts, a uniform weakening of the U.S. dollar will yield the largest
overall potential net loss in earnings due to exchange. This measurement assumes that a change in one foreign currency relative to the U.S. dollar would not affect
other foreign currencies relative to the U.S. dollar. Although not predictive in nature, the Company believes that a 10% threshold reflects reasonably possible near-
term changes in Merck’s major foreign currency exposures relative to the U.S. dollar. The cash flows from these contracts are reported as operating activities in the
Consolidated Statement of Cash Flows.

The  economy  of  Argentina  was  determined  to  be  hyperinflationary  in  2018;  consequently,  in  accordance  with  U.S.  GAAP,  the  Company  began

remeasuring its monetary assets and liabilities for those operations in earnings. The impact to the Company’s results was immaterial.

The Company also uses forward exchange contracts to hedge a portion of its net investment in foreign operations against movements in exchange rates.
The  forward  contracts  are  designated  as  hedges  of  the  net  investment  in  a  foreign  operation.  The  unrealized  gains  or  losses  on  these  contracts  are  recorded  in
foreign currency translation adjustment within OCI, and remain in AOCI until either the sale or complete or substantially complete liquidation of the subsidiary.
The Company excludes certain portions of the change in fair value of its derivative

69

Table of Contents

instruments  from  the  assessment  of  hedge  effectiveness  (excluded  components).  Changes  in  fair  value  of the  excluded  components  are  recognized  in  OCI. The
Company recognizes in earnings the initial value of the excluded components on a straight-line basis over the life of the derivative instrument, rather than using the
mark-to-market approach. The cash flows from these contracts are reported as investing activities in the Consolidated Statement of Cash Flows.

Foreign exchange risk is also managed through the use of foreign currency debt. The Company’s senior unsecured euro-denominated notes have been
designated as, and are effective as, economic hedges of the net investment in a foreign operation. Accordingly, foreign currency transaction gains or losses due to
spot rate fluctuations on the euro-denominated debt instruments are included in foreign currency translation adjustment within OCI.

Interest Rate Risk Management

The Company may use interest rate swap contracts on certain investing and borrowing transactions to manage its net exposure to interest rate changes
and to reduce  its overall  cost  of borrowing.  The Company does not use leveraged  swaps and, in general,  does not leverage  any of its investment  activities  that
would put principal capital at risk.

At December 31, 2020, the Company was a party to 14 pay-floating, receive-fixed interest rate swap contracts designated as fair value hedges of fixed-

rate notes in which the notional amounts match the amount of the hedged fixed-rate notes as detailed in the table below.

($ in millions)

Debt Instrument
3.875% notes due 2021 
2.40% notes due 2022
2.35% notes due 2022

(1)

(1)

 These interest rate swaps matured in January 2021.

Par Value of Debt

$

1,150 
1,000 
1,250 

2020
Number of Interest Rate
Swaps Held

Total Swap Notional
Amount

$

5 
4 
5 

1,150 
1,000 
1,250 

The interest rate swap contracts are designated hedges of the fair value changes in the notes attributable to changes in the benchmark London Interbank
Offered Rate (LIBOR) swap rate. The fair value changes in the notes attributable to changes in the LIBOR swap rate are recorded in interest expense along with the
offsetting fair value changes in the swap contracts. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash
Flows.

The Company’s investment portfolio includes cash equivalents and short-term investments, the market values of which are not significantly affected by
changes in interest rates. The market value of the Company’s medium- to long-term fixed-rate investments is modestly affected by changes in U.S. interest rates.
Changes in medium- to long-term U.S. interest rates have a more significant impact on the market value of the Company’s fixed-rate borrowings, which generally
have longer maturities. A sensitivity analysis to measure potential changes in the market value of Merck’s investments and debt from a change in interest rates
indicated that a one percentage point increase in interest rates at December 31, 2020 and 2019 would have positively affected the net aggregate market value of
these instruments by $2.6 billion and $2.0 billion, respectively. A one percentage point decrease at December 31, 2020 and 2019 would have negatively affected
the net aggregate market value by $3.1 billion and $2.2 billion, respectively. The fair value of Merck’s debt was determined using pricing models reflecting one
percentage  point  shifts  in  the  appropriate  yield  curves.  The  fair  values  of  Merck’s  investments  were  determined  using  a  combination  of  pricing  and  duration
models.

Critical Accounting Estimates

The Company’s consolidated financial statements are prepared in conformity with GAAP and, accordingly, include certain amounts that are based on
management’s best estimates and judgments. Estimates are used when accounting for amounts recorded in connection with acquisitions, including initial fair value
determinations  of assets and liabilities  (primarily  IPR&D, other intangible  assets and contingent  consideration),  as well as subsequent fair  value measurements.
Additionally,  estimates  are  used  in  determining  such  items  as  provisions  for  sales  discounts  and  returns,  depreciable  and  amortizable  lives,  recoverability  of
inventories, including

70

Table of Contents

those produced in preparation for product launches, amounts recorded for contingencies, environmental liabilities, accruals for contingent sales-based milestone
payments and other reserves, pension and other postretirement benefit plan assumptions, share-based compensation assumptions, restructuring costs, impairments
of long-lived assets (including intangible assets and goodwill) and investments, and taxes on income. Because of the uncertainty inherent in such estimates, actual
results may differ from these estimates. Application of the following accounting policies result in accounting estimates having the potential for the most significant
impact on the financial statements.

Acquisitions and Dispositions

To determine whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses, the Company makes certain judgments,
which include assessment of the inputs, processes, and outputs associated with the acquired set of activities. If the Company determines that substantially all of the
fair value of gross assets included in a transaction is concentrated in a single asset (or a group of similar assets), the assets would not represent a business. To be
considered a business, the assets in a transaction need to include an input and a substantive process that together significantly contribute to the ability to create
outputs.

In a business combination, the acquisition method of accounting requires that the assets acquired and liabilities assumed be recorded as of the date of
the  acquisition  at  their  respective  fair  values  with  limited  exceptions.  Assets  acquired  and  liabilities  assumed  in  a  business  combination  that  arise  from
contingencies are generally recognized at fair value. If fair value cannot be determined, the asset or liability is recognized if probable and reasonably estimable; if
these criteria are not met, no asset or liability is recognized. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a
liability  (an  exit  price)  in  the  principal  or  most  advantageous  market  for  the  asset  or  liability  in  an  orderly  transaction  between  market  participants  on  the
measurement date. Accordingly, the Company may be required to value assets at fair value measures that do not reflect the Company’s intended use of those assets.
Any excess of the purchase price (consideration transferred) over the estimated fair values of net assets acquired is recorded as goodwill. Transaction costs and
costs to restructure  the acquired  company are  expensed  as incurred.  The operating  results of the acquired  business are  reflected  in the Company’s consolidated
financial statements after the date of the acquisition. The fair values of intangible assets, including acquired IPR&D, are determined utilizing information available
near  the  acquisition  date  based  on  expectations  and  assumptions  that  are  deemed  reasonable  by  management.  Given  the  considerable  judgment  involved  in
determining  fair  values,  the  Company  typically  obtains  assistance  from  third-party  valuation  specialists  for  significant  items.  Amounts  allocated  to  acquired
IPR&D are capitalized and accounted for as indefinite-lived intangible assets, subject to impairment testing until completion or abandonment of the projects. Upon
successful completion of each project, Merck will make a determination  as to the then-useful life of the intangible asset, generally determined by the period in
which the substantial majority of the cash flows are expected to be generated, and begin amortization. Certain of the Company’s business acquisitions involve the
potential for future payment of consideration that is contingent upon the achievement of performance milestones, including product development milestones and
royalty  payments  on  future  product  sales.  The  fair  value  of  contingent  consideration  liabilities  is  determined  at  the  acquisition  date  using  unobservable  inputs.
These  inputs  include  the  estimated  amount  and  timing  of  projected  cash  flows,  the  probability  of  success  (achievement  of  the  contingent  event)  and  the  risk-
adjusted discount rate used to present value the probability-weighted cash flows. Subsequent to the acquisition date, at each reporting period until the contingency
is resolved, the contingent consideration liability is remeasured at current fair value with changes (either expense or income) recorded in earnings. Changes in any
of the inputs may result in a significantly different fair value adjustment.

The judgments made in determining estimated fair values assigned to assets acquired and liabilities assumed in a business combination, as well as asset

lives, can materially affect the Company’s results of operations.

The fair values of identifiable intangible assets related to currently marketed products and product rights are primarily determined by using an income
approach through which fair value is estimated based on each asset’s discounted projected net cash flows. The Company’s estimates of market participant net cash
flows  consider  historical  and  projected  pricing,  margins  and  expense  levels;  the  performance  of  competing  products  where  applicable;  relevant  industry  and
therapeutic  area  growth drivers  and  factors;  current  and  expected  trends  in  technology  and product  life  cycles;  the  time  and investment  that  will  be  required  to
develop products and technologies; the ability to obtain marketing and regulatory approvals; the ability to manufacture and commercialize

71

Table of Contents

the products; the extent and timing of potential new product introductions by the Company’s competitors; and the life of each asset’s underlying patent, if any. The
net cash flows are then probability-adjusted where appropriate to consider the uncertainties associated with the underlying assumptions, as well as the risk profile
of  the  net  cash  flows  utilized  in  the  valuation.  The  probability-adjusted  future  net  cash  flows  of  each  product  are  then  discounted  to  present  value  utilizing  an
appropriate discount rate.

The fair values of identifiable intangible assets related to IPR&D are also determined using an income approach, through which fair value is estimated
based on each asset’s probability-adjusted future net cash flows, which reflect the different stages of development of each product and the associated probability of
successful completion. The net cash flows are then discounted to present value using an appropriate discount rate.

If the Company determines the transaction will not be accounted for as an acquisition of a business, the transaction will be accounted for as an asset
acquisition rather than a business combination and, therefore, no goodwill will be recorded. In an asset acquisition, acquired IPR&D with no alternative future use
is charged to expense and contingent  consideration is not recognized at the acquisition  date. In these instances,  product development  milestones are recognized
upon achievement and sales-based milestones are recognized when the milestone is deemed probable by the Company of being achieved.

Revenue Recognition

Recognition  of  revenue  requires  evidence  of  a  contract,  probable  collection  of  sales  proceeds  and  completion  of  substantially  all  performance
obligations.  Merck  acts  as  the  principal  in  substantially  all  of  its  customer  arrangements  and  therefore  records  revenue  on  a  gross  basis.  The  majority  of  the
Company’s contracts related to the Pharmaceutical and Animal Health segments have a single performance obligation - the promise to transfer goods. Shipping is
considered immaterial in the context of the overall customer arrangement and damages or loss of goods in transit are rare. Therefore, shipping is not deemed a
separately recognized performance obligation.

The vast majority of revenues from sales of products are recognized at a point in time when control of the goods is transferred to the customer, which
the Company has determined is when title and risks and rewards of ownership transfer to the customer and the Company is entitled to payment. For certain services
in the Animal Health segment, revenue is recognized over time, generally ratably over the contract term as services are provided. These service revenues are not
material.

The nature of the Company’s business gives rise to several types of variable consideration including discounts and returns, which are estimated at the

time of sale generally using the expected value method, although the most likely amount method is used for prompt pay discounts.

In the United States, sales discounts are issued to customers at the point-of-sale, through an intermediary wholesaler (known as chargebacks), or in the
form of rebates. Additionally, sales are generally made with a limited right of return under certain conditions. Revenues are recorded net of provisions for sales
discounts and returns, which are established at the time of sale. In addition, revenues are recorded net of time value of money discounts if collection of accounts
receivable is expected to be in excess of one year.

The U.S. provision for aggregate customer discounts covers chargebacks and rebates. Chargebacks are discounts that occur when a contracted customer
purchases through an intermediary wholesaler. The contracted customer generally purchases product from the wholesaler at its contracted price plus a mark-up.
The  wholesaler,  in  turn,  charges  the  Company  back  for  the  difference  between  the  price  initially  paid  by  the  wholesaler  and  the  contract  price  paid  to  the
wholesaler  by  the  customer.  The  provision  for  chargebacks  is  based  on  expected  sell-through  levels  by  the  Company’s  wholesale  customers  to  contracted
customers, as well as estimated wholesaler inventory levels. Rebates are amounts owed based upon definitive contractual agreements or legal requirements with
private  sector  and  public  sector  (Medicaid  and  Medicare  Part  D)  benefit  providers,  after  the  final  dispensing  of  the  product  by  a  pharmacy  to  a  benefit  plan
participant.  The  provision  for  rebates  is  based  on  expected  patient  usage,  as  well  as  inventory  levels  in  the  distribution  channel  to  determine  the  contractual
obligation to the benefit providers. The Company uses historical customer segment utilization mix, sales forecasts, changes to product mix and price, inventory
levels  in  the  distribution  channel,  government  pricing  calculations  and  prior  payment  history  in  order  to  estimate  the  expected  provision.  Amounts  accrued  for
aggregate customer discounts are evaluated on a quarterly

72

Table of Contents

basis through comparison of information provided by the wholesalers, health maintenance organizations, pharmacy benefit managers, federal and state agencies,
and other customers to the amounts accrued.

The Company continually monitors its provision for aggregate customer discounts. There were no material adjustments to estimates associated with the

aggregate customer discount provision in 2020, 2019 or 2018.

Summarized information about changes in the aggregate customer discount accrual related to U.S. sales is as follows:

($ in millions)
Balance January 1
Current provision
Adjustments to prior years
Payments
Balance December 31

2020

2019

$

$

2,436  $
13,144 
(16)
(12,454)

3,110  $

2,630 
11,999 
(230)
(11,963)
2,436 

Accruals for chargebacks are reflected as a direct reduction to accounts receivable and accruals for rebates as current liabilities. The accrued balances
relative  to  these  provisions  included  in  Accounts  receivable and  Accrued  and  other  current  liabilities were  $249  million  and  $2.9  billion,  respectively,  at
December 31, 2020 and were $233 million and $2.2 billion, respectively, at December 31, 2019.

Outside of the United States, variable consideration in the form of discounts and rebates are a combination of commercially-driven discounts in highly
competitive product classes, discounts required to gain or maintain reimbursement, or legislatively mandated rebates. In certain European countries, legislatively
mandated rebates are calculated based on an estimate of the government’s total unbudgeted spending and the Company’s specific payback obligation. Rebates may
also be required based on specific product sales thresholds. The Company applies an estimated factor against its actual invoiced sales to represent the expected
level of future discount or rebate obligations associated with the sale.

The  Company  maintains  a  returns  policy  that  allows  its  U.S.  pharmaceutical  customers  to  return  product  within  a  specified  period  prior  to  and
subsequent to the expiration date (generally, three to six months before and 12 months after product expiration). The estimate of the provision for returns is based
upon historical experience with actual returns. Additionally, the Company considers factors such as levels of inventory in the distribution channel, product dating
and  expiration  period,  whether  products  have  been  discontinued,  entrance  in  the  market  of  generic  competition,  changes  in  formularies  or  launch  of  over-the-
counter products, among others. The product returns provision for U.S. pharmaceutical sales as a percentage of U.S. net pharmaceutical sales was 0.6% in 2020,
1.1% in 2019 and 1.6% in 2018. Outside of the United States, returns are only allowed in certain countries on a limited basis.

Merck’s  payment  terms  for  U.S.  pharmaceutical  customers  are  typically  36  days  from  receipt  of  invoice  and  for  U.S.  animal  health  customers  are
typically 30 days from receipt of invoice; however, certain products, including Keytruda, have longer payment terms, some of which are up to 90 days. Outside of
the United States, payment terms are typically 30 days to 90 days, although certain markets have longer payment terms.

Through  its  distribution  programs  with  U.S.  wholesalers,  the  Company  encourages  wholesalers  to  align  purchases  with  underlying  demand  and
maintain inventories below specified levels. The terms of the programs allow the wholesalers to earn fees upon providing visibility into their inventory levels, as
well  as  by  achieving  certain  performance  parameters  such  as  inventory  management,  customer  service  levels,  reducing  shortage  claims  and  reducing  product
returns. Information provided through the wholesaler distribution programs includes items such as sales trends, inventory on-hand, on-order quantity and product
returns.

Wholesalers generally provide only the above-mentioned data to the Company, as there is no regulatory requirement to report lot level information to
manufacturers,  which  is  the  level  of  information  needed  to  determine  the  remaining  shelf  life  and  original  sale  date  of  inventory.  Given  current  wholesaler
inventory levels, which are generally less than a month, the Company believes that collection of order lot information across all wholesale customers would have
limited use in estimating sales discounts and returns.

73

Table of Contents

Inventories Produced in Preparation for Product Launches

The  Company  capitalizes  inventories  produced  in  preparation  for  product  launches  sufficient  to  support  estimated  initial  market  demand.  Typically,
capitalization of such inventory does not begin until the related product candidates are in Phase 3 clinical trials and are considered to have a high probability of
regulatory approval. The Company monitors the status of each respective product within the regulatory approval process; however, the Company generally does
not  disclose  specific  timing  for  regulatory  approval.  If  the  Company  is  aware  of  any  specific  risks  or  contingencies  other  than  the  normal  regulatory  approval
process  or  if  there  are  any  specific  issues  identified  during  the  research  process  relating  to  safety,  efficacy,  manufacturing,  marketing  or  labeling,  the  related
inventory would generally not be capitalized. Expiry dates of the inventory are affected by the stage of completion. The Company manages the levels of inventory
at each stage to optimize the shelf life of the inventory in relation to anticipated market demand in order to avoid product expiry issues. For inventories that are
capitalized,  anticipated  future  sales  and  shelf  lives  support  the  realization  of  the  inventory  value  as  the  inventory  shelf  life  is  sufficient  to  meet  initial  product
launch requirements. Inventories produced in preparation for product launches capitalized at December 31, 2020 and 2019 were $279 million and $168 million,
respectively.

Contingencies and Environmental Liabilities

The Company is involved in various claims and legal proceedings of a nature considered normal to its business, including product liability, intellectual
property  and  commercial  litigation,  as  well  as  certain  additional  matters  including  governmental  and  environmental  matters  (see  Note  10  to  the  consolidated
financial  statements).  The  Company  records  accruals  for  contingencies  when  it  is  probable  that  a  liability  has  been  incurred  and  the  amount  can  be  reasonably
estimated. These accruals are adjusted periodically as assessments change or additional information becomes available. For product liability claims, a portion of the
overall  accrual  is  actuarially  determined  and  considers  such  factors  as  past  experience,  number  of  claims  reported  and  estimates  of  claims  incurred  but  not  yet
reported. Individually significant contingent losses are accrued when probable and reasonably estimable.

Legal defense costs expected to be incurred in connection with a loss contingency are accrued when probable and reasonably estimable. Some of the
significant  factors  considered  in  the  review  of  these  legal  defense  reserves  are  as  follows:  the  actual  costs  incurred  by  the  Company;  the  development  of  the
Company’s  legal  defense  strategy  and  structure  in  light  of  the  scope  of  its  litigation;  the  number  of  cases  being  brought  against  the  Company;  the  costs  and
outcomes of completed trials and the most current information regarding anticipated timing, progression, and related costs of pre-trial activities and trials in the
associated  litigation.  The  amount  of  legal  defense  reserves  as  of  December  31,  2020  and  2019  of  approximately  $250  million  and  $240  million,  respectively,
represents the Company’s best estimate of the minimum amount of defense costs to be incurred in connection with its outstanding litigation; however, events such
as  additional  trials  and  other  events  that  could  arise  in  the  course  of  its  litigation  could  affect  the  ultimate  amount  of  legal  defense  costs  to  be  incurred  by  the
Company. The Company will continue to monitor its legal defense costs and review the adequacy of the associated reserves and may determine to increase the
reserves at any time in the future if, based upon the factors set forth, it believes it would be appropriate to do so.

The Company and its subsidiaries are parties to a number of proceedings brought under the Comprehensive Environmental Response, Compensation
and  Liability  Act,  commonly  known  as  Superfund,  and  other  federal  and  state  equivalents.  When  a  legitimate  claim  for  contribution  is  asserted,  a  liability  is
initially  accrued  based  upon  the  estimated  transaction  costs  to  manage  the  site.  Accruals  are  adjusted  as  site  investigations,  feasibility  studies  and  related  cost
assessments of remedial techniques are completed, and as the extent to which other potentially responsible parties who may be jointly and severally liable can be
expected to contribute is determined.

The Company is also remediating environmental contamination resulting from past industrial activity at certain of its sites and takes an active role in
identifying  and  accruing  for  these  costs.  In  the  past,  Merck  performed  a  worldwide  survey  to  assess  all  sites  for  potential  contamination  resulting  from  past
industrial activities. Where assessment indicated that physical investigation was warranted, such investigation was performed, providing a better evaluation of the
need  for  remedial  action.  Where  such  need  was  identified,  remedial  action  was  then  initiated.  As  definitive  information  became  available  during  the  course  of
investigations  and/or  remedial  efforts  at  each  site,  estimates  were  refined  and  accruals  were  established  or  adjusted  accordingly.  These  estimates  and  related
accruals continue to be refined annually.

74

Table of Contents

The Company believes that there are no compliance issues associated with applicable environmental laws and regulations that would have a material
adverse  effect  on  the  Company.  Expenditures  for  remediation  and  environmental  liabilities  were  $11  million  in  2020  and  are  estimated  at  $46  million  in  the
aggregate for the years 2021 through 2025. In management’s opinion, the liabilities for all environmental matters that are probable and reasonably estimable have
been  accrued  and  totaled  $67  million  at  both  December  31,  2020  and  2019.  These  liabilities  are  undiscounted,  do  not  consider  potential  recoveries  from  other
parties and will be paid out over the periods of remediation for the applicable sites, which are expected to occur primarily over the next 15 years. Although it is not
possible to predict with certainty the outcome of these matters, or the ultimate costs of remediation,  management does not believe that any reasonably possible
expenditures that may be incurred in excess of the liabilities accrued should exceed approximately $65 million in the aggregate. Management also does not believe
that these expenditures should result in a material adverse effect on the Company’s financial condition, results of operations or liquidity for any year.

Share-Based Compensation

The Company expenses all share-based payment awards to employees, including grants of stock options, over the requisite service period based on the
grant date fair value of the awards. The Company determines the fair value of certain share-based awards using the Black-Scholes option-pricing model which uses
both  historical  and  current  market  data  to  estimate  the  fair  value.  This  method  incorporates  various  assumptions  such  as  the  risk-free  interest  rate,  expected
volatility, expected dividend yield and expected life of the options. Total pretax share-based compensation expense was $475 million in 2020, $417 million in 2019
and $348 million in 2018. At December 31, 2020, there was $678 million of total pretax unrecognized compensation expense related to nonvested stock option,
restricted stock unit and performance share unit awards which will be recognized over a weighted-average period of 1.9 years. For segment reporting, share-based
compensation costs are unallocated expenses.

Pensions and Other Postretirement Benefit Plans

Net periodic benefit cost for pension plans totaled $454 million in 2020, $137 million in 2019 and $195 million in 2018. Net periodic benefit (credit)
for other postretirement benefit plans was $(59) million in 2020, $(49) million in 2019 and $(45) million in 2018. Pension and other postretirement benefit plan
information for financial reporting purposes is calculated using actuarial assumptions including a discount rate for plan benefit obligations and an expected rate of
return on plan assets. The changes in net periodic benefit cost year over year for pension plans are largely attributable to changes in the discount rate affecting net
loss amortization.

The Company reassesses its benefit plan assumptions on a regular basis. For both the pension and other postretirement benefit plans, the discount rate is
evaluated on measurement dates and modified to reflect the prevailing market rate of a portfolio of high-quality fixed-income debt instruments that would provide
the future cash flows needed to pay the benefits included in the benefit obligation as they come due. The discount rates for the Company’s U.S. pension and other
postretirement benefit plans ranged from 2.10% to 2.80% at December 31, 2020, compared with a range of 3.20% to 3.50% at December 31, 2019.

The expected rate of return for both the pension and other postretirement benefit plans represents the average rate of return to be earned on plan assets
over the period the benefits included in the benefit obligation are to be paid. In developing the expected rate of return, the Company considers long-term compound
annualized  returns  of  historical  market  data,  current  market  conditions  and  actual  returns  on  the  Company’s  plan  assets.  Using  this  reference  information,  the
Company  develops  forward-looking  return  expectations  for  each  asset  category  and  a  weighted-average  expected  long-term  rate  of  return  for  a  target  portfolio
allocated  across  these  investment  categories.  The  expected  portfolio  performance  reflects  the  contribution  of  active  management  as  appropriate.  For  2021,  the
expected rate of return for the Company’s U.S. pension and other postretirement benefit plans will range from 6.50% to 6.70%, compared to a range of 7.00% to
7.30% in 2020.

The Company has established investment guidelines for its U.S. pension and other postretirement plans to create an asset allocation that is expected to
deliver a rate of return sufficient to meet the long-term obligation of each plan, given an acceptable level of risk. The target investment portfolio of the Company’s
U.S. pension and other postretirement benefit plans is allocated 30% to 45% in U.S. equities, 15% to 30% in international equities, 35% to 45% in fixed-income
investments, and up to 5% in cash and other investments. The portfolio’s equity weighting is consistent with the long-term nature of the plans’ benefit obligations.
The expected annual standard

75

Table of Contents

deviation of returns of the target portfolio, which approximates 11%, reflects both the equity allocation and the diversification benefits among the asset classes in
which the portfolio invests. For non-U.S. pension plans, the targeted investment portfolio varies based on the duration of pension liabilities and local government
rules and regulations. Although a significant percentage of plan assets are invested in U.S. equities, concentration risk is mitigated through the use of strategies that
are diversified within management guidelines.

Actuarial assumptions are based upon management’s best estimates and judgment. A reasonably possible change of plus (minus) 25 basis points in the
discount rate assumption, with other assumptions held constant, would have had an estimated $80 million favorable (unfavorable) impact on the Company’s net
periodic benefit cost in 2020. A reasonably possible change of plus (minus) 25 basis points in the expected rate of return assumption, with other assumptions held
constant, would have had an estimated $40 million favorable (unfavorable) impact on Merck’s net periodic benefit cost in 2020. Required funding obligations for
2021 relating to the Company’s pension and other postretirement benefit plans are not expected to be material. The preceding hypothetical changes in the discount
rate and expected rate of return assumptions would not impact the Company’s funding requirements.

Net loss amounts, which primarily reflect differences between expected and actual returns on plan assets as well as the effects of changes in actuarial
assumptions, are recorded as a component of AOCI. Expected returns for pension plans are based on a calculated market-related value of assets. Net loss amounts
in AOCI in excess of certain thresholds are amortized into net periodic benefit cost over the average remaining service life of employees.

Restructuring Costs

Restructuring costs have been recorded in connection with restructuring programs designed to streamline the Company’s cost structure. As a result, the
Company  has  made  estimates  and  judgments  regarding  its  future  plans,  including  future  termination  benefits  and  other  exit  costs  to  be  incurred  when  the
restructuring actions take place. When accruing termination costs, the Company will recognize the amount within a range of costs that is the best estimate within
the  range.  When  no  amount  within  the  range  is  a  better  estimate  than  any  other  amount,  the  Company  recognizes  the  minimum  amount  within  the  range.  In
connection with these actions, management also assesses the recoverability of long-lived assets employed in the business. In certain instances, asset lives have been
shortened based on changes in the expected useful lives of the affected assets. Severance and other related costs are reflected within Restructuring costs. Asset-
related charges are reflected within Cost of sales, Selling, general and administrative expenses and Research and development expenses depending upon the nature
of the asset.

Impairments of Long-Lived Assets

The  Company  assesses  changes  in  economic,  regulatory  and  legal  conditions  and  makes  assumptions  regarding  estimated  future  cash  flows  in

evaluating the value of the Company’s property, plant and equipment, goodwill and other intangible assets.

The Company periodically evaluates whether current facts or circumstances indicate that the carrying values of its long-lived assets to be held and used
may  not  be  recoverable.  If  such  circumstances  are  determined  to  exist,  an  estimate  of  the  undiscounted  future  cash  flows  of  these  assets,  or  appropriate  asset
groupings, is compared to the carrying value to determine whether an impairment exists. If the asset is determined to be impaired, the loss is measured based on the
difference between the asset’s fair value and its carrying value. If quoted market prices are not available, the Company will estimate fair value using a discounted
value of estimated future cash flows approach.

Goodwill represents the excess of the consideration transferred over the fair value of net assets of businesses acquired. Goodwill is assigned to reporting
units and evaluated for impairment on at least an annual basis, or more frequently if impairment indicators exist, by first assessing qualitative factors to determine
whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. Some of the factors considered in the assessment include
general macroeconomic conditions, conditions specific to the industry and market, cost factors which could have a significant effect on earnings or cash flows, the
overall financial performance of the reporting unit, and whether there have been sustained declines in the Company’s share price. If the Company concludes it is
more likely than not that the fair value of a reporting unit is less than its carrying amount, a quantitative fair value test is performed. If the carrying value of a
reporting unit is greater than its fair value, a goodwill impairment charge will be recorded for the difference (up to the carrying value of goodwill).

76

Table of Contents

Other acquired intangible assets (excluding IPR&D) are initially recorded at fair value, assigned an estimated useful life, and amortized primarily on a
straight-line basis over their estimated useful lives. When events or circumstances warrant a review, the Company will assess recoverability from future operations
using pretax undiscounted cash flows derived from the lowest appropriate asset groupings. Impairments are recognized in operating results to the extent that the
carrying value of the intangible asset exceeds its fair value, which is determined based on the net present value of estimated future cash flows.

IPR&D that the Company acquires in conjunction with the acquisition of a business represents the fair value assigned to incomplete research projects
which, at the time of acquisition, have not reached technological feasibility. The amounts are capitalized and accounted for as indefinite-lived intangible assets,
subject  to  impairment  testing  until  completion  or  abandonment  of  the  projects.  The  Company  evaluates  IPR&D  for  impairment  at  least  annually,  or  more
frequently if impairment indicators exist, by performing a quantitative test that compares the fair value of the IPR&D intangible asset with its carrying value. For
impairment  testing  purposes,  the  Company  may  combine  separately  recorded  IPR&D intangible  assets  into  one  unit  of  account  based  on  the  relevant  facts  and
circumstances. Generally, the Company will combine IPR&D intangible assets for testing purposes if they operate as a single asset and are essentially inseparable.
If the fair value is less than the carrying amount, an impairment loss is recognized in operating results.

The judgments made in evaluating impairment of long-lived intangibles can materially affect the Company’s results of operations.

Impairments of Investments

The Company reviews its investments in marketable debt securities for impairments based on the determination of whether the decline in market value
of  the  investment  below  the  carrying  value  is  other-than-temporary.  The  Company  considers  available  evidence  in  evaluating  potential  impairments  of  its
investments  in  marketable  debt  securities,  including  the  duration  and  extent  to  which  fair  value  is  less  than  cost.  Changes  in  fair  value  that  are  considered
temporary are reported net of tax in OCI. An other-than-temporary impairment has occurred if the Company does not expect to recover the entire amortized cost
basis of the marketable debt security. If the Company does not intend to sell the impaired debt security, and it is not more likely than not it will be required to sell
the debt security before the recovery of its amortized  cost basis, the amount of  the other-than-temporary impairment recognized in earnings, recorded in  Other
(income) expense, net, is limited to the portion attributed to credit loss. The remaining portion of the other-than-temporary impairment related to other factors is
recognized in OCI.

Investments in publicly traded equity securities are reported at fair value determined using quoted market prices in active markets for identical assets or
quoted prices for similar assets or other inputs that are observable or can be corroborated by observable market data. Changes in fair value are included in Other
(income) expense, net. Investments in equity securities without readily determinable  fair values are recorded at cost, plus or minus subsequent observable price
changes in orderly transactions for identical or similar investments, minus impairments. Such adjustments are recognized in Other (income) expense, net. Realized
gains and losses for equity securities are included in Other (income) expense, net.

Taxes on Income

The Company’s effective tax rate is based on pretax income, statutory tax rates and tax planning opportunities available in the various jurisdictions in
which  the  Company  operates.  An  estimated  effective  tax  rate  for  a  year  is  applied  to  the  Company’s  quarterly  operating  results.  In  the  event  that  there  is  a
significant unusual or one-time item recognized, or expected to be recognized, in the Company’s quarterly operating results, the tax attributable to that item would
be separately calculated and recorded at the same time as the unusual or one-time item. The Company considers the resolution of prior year tax matters to be such
items. Significant judgment is required in determining the Company’s tax provision and in evaluating its tax positions. The recognition and measurement of a tax
position  is  based  on  management’s  best  judgment  given  the  facts,  circumstances  and  information  available  at  the  reporting  date.  The  Company  evaluates  tax
positions to determine whether the benefits of tax positions are more likely than not of being sustained upon audit based on the technical merits of the tax position.
For tax positions that are more likely than not of being sustained upon audit, the Company recognizes the largest amount of the benefit that is greater than 50%
likely of being realized upon ultimate settlement in the

77

Table of Contents

financial statements. For tax positions that are not more likely than not of being sustained upon audit, the Company does not recognize any portion of the benefit in
the financial statements. If the more likely than not threshold is not met in the period for which a tax position is taken, the Company may subsequently recognize
the benefit of that tax position if the tax matter is effectively settled, the statute of limitations expires, or if the more likely than not threshold is met in a subsequent
period (see Note 15 to the consolidated financial statements).

Tax  regulations  require  items  to  be  included  in  the  tax  return  at  different  times  than  the  items  are  reflected  in  the  financial  statements.  Timing
differences create deferred tax assets and liabilities. Deferred tax assets generally represent items that can be used as a tax deduction or credit in the tax return in
future years for which the Company has already recorded the tax benefit in the financial statements. The Company establishes valuation allowances for its 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 generally represent
tax expense recognized in the financial statements for which payment has been deferred or expense for which the Company has already taken a deduction on the
tax return, but has not yet recognized as expense in the financial statements.

Recently Issued Accounting Standards

For a discussion of recently issued accounting standards, see Note 2 to the consolidated financial statements.

Cautionary Factors That May Affect Future Results

This report and other written reports and oral statements made from time to time by the Company may contain so-called “forward-looking statements,”
all of which are based on management’s current expectations and are subject to risks and uncertainties which may cause results to differ materially from those set
forth  in  the  statements.  One  can  identify  these  forward-looking  statements  by  their  use  of  words  such  as  “anticipates,”  “expects,”  “plans,”  “will,”  “estimates,”
“forecasts,” “projects” and other words of similar meaning, or negative variations of any of the foregoing. One can also identify them by the fact that they do not
relate  strictly  to  historical  or  current  facts.  These  statements  are  likely  to  address  the  Company’s  growth  strategy,  financial  results,  product  approvals,  product
potential,  development  programs  and  include  statements  related  to  the  expected  impact  of  the  COVID-19  pandemic.  One  must  carefully  consider  any  such
statement and should understand that many factors could cause actual results to differ materially from the Company’s forward-looking statements. These factors
include  inaccurate  assumptions  and  a  broad  variety  of  other  risks  and  uncertainties,  including  some  that  are  known  and  some  that  are  not.  No  forward-looking
statement can be guaranteed and actual future results may vary materially.

The  Company  does  not  assume  the  obligation  to  update  any  forward-looking  statement.  One  should  carefully  evaluate  such  statements  in  light  of
factors, including risk factors, described in the Company’s filings with the Securities and Exchange Commission, especially on this Form 10-K and Forms 10-Q
and 8-K. In Item 1A. “Risk Factors” of this annual report on Form 10-K the Company discusses in more detail various important risk factors that could cause actual
results to differ from expected or historic results. The Company notes these factors for investors as permitted by the Private Securities Litigation Reform Act of
1995.  One  should  understand  that  it  is  not  possible  to  predict  or  identify  all  such  factors.  Consequently,  the  reader  should  not  consider  any  such  list  to  be  a
complete statement of all potential risks or uncertainties.

Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

The information required by this Item is incorporated by reference to the discussion under “Financial Instruments Market Risk Disclosures” in Item 7.

“Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

78

 
Table of Contents

Item 8.

Financial Statements and Supplementary Data.                

(a)

Financial Statements

The  consolidated  balance  sheet  of  Merck  &  Co.,  Inc.  and  subsidiaries  as  of  December  31,  2020  and  2019,  and  the  related  consolidated  statements  of
income,  of  comprehensive  income,  of  equity  and  of  cash  flows  for  each  of  the  three  years  in  the  period  ended  December  31,  2020,  the  notes  to  consolidated
financial statements, and the report dated February 25, 2021 of PricewaterhouseCoopers LLP, independent registered public accounting firm, are as follows:

Consolidated Statement of Income
Merck & Co., Inc. and Subsidiaries
Years Ended December 31
($ in millions except per share amounts)

Sales
Costs, Expenses and Other

Cost of sales
Selling, general and administrative
Research and development
Restructuring costs
Other (income) expense, net

2020

2019

2018

$

47,994  $

46,840  $

42,294 

15,485 
10,468 
13,558 
578 
(886)
39,203 
8,791 
1,709 
7,082 
15 
7,067  $
2.79  $
2.78  $

14,112 
10,615 
9,872 
638 
139 
35,376 
11,464 
1,687 
9,777 
(66)
9,843  $
3.84  $
3.81  $

13,509 
10,102 
9,752 
632 
(402)
33,593 
8,701 
2,508 
6,193 
(27)
6,220 
2.34 
2.32 

2020

2019

2018

$

7,067  $

9,843  $

6,220 

(297)
(18)
(279)
153 
(441)
6,626  $

(135)
96 
(705)
96 
(648)
9,195  $

297 
(10)
(425)
(223)
(361)
5,859 

Income Before Taxes
Taxes on Income
Net Income
Less: Net Income (Loss) Attributable to Noncontrolling Interests
Net Income Attributable to Merck & Co., Inc.
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders

$
$
$

Consolidated Statement of Comprehensive Income
Merck & Co., Inc. and Subsidiaries
Years Ended December 31
($ in millions)

Net Income Attributable to Merck & Co., Inc.
Other Comprehensive Loss Net of Taxes:

Net unrealized (loss) gain on derivatives, net of reclassifications
Net unrealized (loss) gain on investments, net of reclassifications
Benefit plan net (loss) gain and prior service (cost) credit, net of amortization
Cumulative translation adjustment

Comprehensive Income Attributable to Merck & Co., Inc.

$

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

79

 
 
Table of Contents

Consolidated Balance Sheet
Merck & Co., Inc. and Subsidiaries
December 31
($ in millions except per share amounts)

Assets
Current Assets

Cash and cash equivalents
Short-term investments
Accounts receivable (net of allowance for doubtful accounts of $85 in 2020

and $86 in 2019)

Inventories (excludes inventories of $2,197 in 2020 and $1,480 in 2019

classified in Other assets - see Note 7)

Other current assets

Total current assets
Investments
Property, Plant and Equipment (at cost)

Land
Buildings
Machinery, equipment and office furnishings
Construction in progress

Less: accumulated depreciation

Goodwill
Other Intangibles, Net
Other Assets

Liabilities and Equity
Current Liabilities

Loans payable and current portion of long-term debt
Trade accounts payable
Accrued and other current liabilities
Income taxes payable
Dividends payable
Total current liabilities
Long-Term Debt
Deferred Income Taxes
Other Noncurrent Liabilities
Merck & Co., Inc. Stockholders’ Equity

Common stock, $0.50 par value

Authorized - 6,500,000,000 shares
Issued - 3,577,103,522 shares in 2020 and 2019

Other paid-in capital
Retained earnings
Accumulated other comprehensive loss

Less treasury stock, at cost:

1,046,877,695 shares in 2020 and 1,038,087,496 shares in 2019

Total Merck & Co., Inc. stockholders’ equity
Noncontrolling Interests
Total equity

The accompanying notes are an integral part of this consolidated financial statement.

80

2020

2019

$

$

8,062 
— 

7,851 

6,310 
5,541 
27,764 
785 

350 
12,645 
16,649 
7,324 
36,968 
18,982 
17,986 
20,238 
14,604 
10,211 
91,588 

6,431 
4,594 
13,053 
1,575 
1,674 
27,327 
25,360 
1,015 
12,482 

1,788 
39,588 
47,362 
(6,634)
82,104 

56,787 
25,317 
87 
25,404 
91,588 

$

$

$

$

$

$

9,676 
774 

6,778 

5,978 
4,277 
27,483 
1,469 

343 
11,989 
15,394 
5,013 
32,739 
17,686 
15,053 
19,425 
14,196 
6,771 
84,397 

3,610 
3,738 
12,549 
736 
1,587 
22,220 
22,736 
1,470 
11,970 

1,788 
39,660 
46,602 
(6,193)
81,857 

55,950 
25,907 
94 
26,001 
84,397 

 
 
 
Table of Contents

Consolidated Statement of Equity
Merck & Co., Inc. and Subsidiaries
Years Ended December 31
($ in millions except per share amounts)

Balance January 1, 2018
Net income attributable to Merck & Co., Inc.
Adoption of new accounting standards
Other comprehensive loss, net of taxes
Cash dividends declared on common stock ($1.99 per share)
Treasury stock shares purchased
Net loss attributable to noncontrolling interests
Distributions attributable to noncontrolling interests
Share-based compensation plans and other
Balance December 31, 2018
Net income attributable to Merck & Co., Inc.
Other comprehensive loss, net of taxes
Cash dividends declared on common stock ($2.26 per share)
Treasury stock shares purchased
Net loss attributable to noncontrolling interests
Distributions attributable to noncontrolling interests
Share-based compensation plans and other
Balance December 31, 2019

Net income attributable to Merck & Co., Inc.
Other comprehensive loss, net of taxes
Cash dividends declared on common stock ($2.48 per share)
Treasury stock shares purchased
Net income attributable to noncontrolling interests
Distributions attributable to noncontrolling interests
Share-based compensation plans and other

Common 
Stock

Other 
Paid-In 
Capital

Retained 
Earnings

Accumulated 
Other 
Comprehensive 
Loss

Treasury 
Stock

Non- 
controlling 
Interests

Total

$

$1,788 
— 
— 
— 
— 
— 
— 
— 
— 
1,788 
— 
— 
— 
— 
— 
— 
— 
1,788 

— 
— 
— 
— 
— 
— 
— 

$

39,902 
— 
— 
— 
— 
(1,000)
— 
— 
(94)
38,808 
— 
— 
— 
1,000 
— 
— 
(148)
39,660 

— 
— 
— 
— 
— 
— 
(72)

$

41,350 
6,220 
322 
— 
(5,313)
— 
— 
— 
— 
42,579 
9,843 
— 
(5,820)
— 
— 
— 
— 
46,602 

7,067 
— 
(6,307)
— 
— 
— 
— 

$

(4,910)
— 
(274)
(361)
— 
— 
— 
— 
— 
(5,545)
— 
(648)
— 
— 
— 
— 
— 
(6,193)

— 
(441)
— 
— 
— 
— 
— 

$

(43,794)
— 
— 
— 
— 
(8,091)
— 
— 
956 
(50,929)
— 
— 
— 
(5,780)
— 
— 
759 
(55,950)

— 
— 
— 
(1,281)
— 
— 
444 

233 
— 
— 
— 
— 
— 
(27)
(25)
— 
181 
— 
— 
— 
— 
(66)
(21)
— 
94 

— 
— 
— 
— 
15 
(22)
— 

87 

$

34,569 
6,220 
48 
(361)
(5,313)
(9,091)
(27)
(25)
862 
26,882 
9,843 
(648)
(5,820)
(4,780)
(66)
(21)
611 
26,001 

7,067 
(441)
(6,307)
(1,281)
15 
(22)
372 

$

25,404 

Balance December 31, 2020

$

1,788 

$

39,588 

$

47,362 

$

(6,634)

$

(56,787)

$

The accompanying notes are an integral part of this consolidated financial statement.

81

Table of Contents

Consolidated Statement of Cash Flows
Merck & Co., Inc. and Subsidiaries
Years Ended December 31
($ in millions)

Cash Flows from Operating Activities
Net income
Adjustments to reconcile net income to net cash provided by operating activities:

Amortization
Depreciation
Intangible asset impairment charges
Charge for the acquisition of VelosBio Inc.
Charge for the acquisition of Peloton Therapeutics, Inc.
Charge for future payments related to collaboration license options
Deferred income taxes
Share-based compensation
Other
Net changes in assets and liabilities:

Accounts receivable
Inventories
Trade accounts payable
Accrued and other current liabilities
Income taxes payable
Noncurrent liabilities
Other

Net Cash Provided by Operating Activities
Cash Flows from Investing Activities
Capital expenditures
Purchase of Seagen Inc. common stock
Purchases of securities and other investments
Proceeds from sales of securities and other investments
Acquisition of VelosBio Inc., net of cash acquired
Acquisition of ArQule, Inc., net of cash acquired
Acquisition of Antelliq Corporation, net of cash acquired
Acquisition of Peloton Therapeutics, Inc., net of cash acquired
Other acquisitions, net of cash acquired
Other
Net Cash (Used in) Provided by Investing Activities
Cash Flows from Financing Activities
Net change in short-term borrowings
Payments on debt
Proceeds from issuance of debt
Purchases of treasury stock
Dividends paid to stockholders
Proceeds from exercise of stock options
Other
Net Cash Used in Financing Activities
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes $258 of restricted cash at January 1, 2020 included in Other

Assets - see Note 6)

2020

2019

2018

$

7,082 

$

9,777 

$

6,193 

1,899 
1,726 
1,718 
2,660 
— 
— 
(668)
475 
(49)

(1,002)
(855)
724 
(1,138)
560 
(453)
(2,426)
10,253 

(4,684)
(1,000)
(95)
2,812 
(2,696)
(2,545)
— 
— 
(1,365)
130 
(9,443)

2,549 
(1,957)
4,419 
(1,281)
(6,215)
89 
(436)
(2,832)
253 
(1,769)

9,934 

1,973 
1,679 
1,040 
— 
993 
— 
(556)
417 
184 

294 
(508)
399 
376 
(2,359)
(237)
(32)
13,440 

(3,473)
— 
(3,202)
8,622 
— 
— 
(3,620)
(1,040)
(294)
378 
(2,629)

(3,710)
— 
4,958 
(4,780)
(5,695)
361 
5 
(8,861)
17 
1,967 

7,967 

3,103 
1,416 
296 
— 
— 
650 
(509)
348 
978 

(418)
(911)
230 
(341)
827 
(266)
(674)
10,922 

(2,615)
— 
(7,994)
15,252 
— 
— 
— 
— 
(431)
102 
4,314 

5,124 
(4,287)
— 
(9,091)
(5,172)
591 
(325)
(13,160)
(205)
1,871 

6,096 

7,967 

Cash, Cash Equivalents and Restricted Cash at End of Year (includes $103 of restricted cash at December 31, 2020 included in Other

Assets - see Note 6)

$

8,165 

$

9,934 

$

The accompanying notes are an integral part of this consolidated financial statement.

82

Table of Contents

Notes to Consolidated Financial Statements
Merck & Co., Inc. and Subsidiaries
($ in millions except per share amounts)

1.    Nature of Operations

Merck & Co., Inc. (Merck or the Company) is a global health care company that delivers innovative health solutions through its prescription medicines,
vaccines,  biologic  therapies  and  animal  health  products.  The  Company’s  operations  are  principally  managed  on  a  products  basis  and  include  two  operating
segments, which are the Pharmaceutical and Animal Health segments, both of which are reportable segments.

The Pharmaceutical segment includes human health pharmaceutical and vaccine products. Human health pharmaceutical products consist of therapeutic
and  preventive  agents,  generally  sold  by  prescription,  for  the  treatment  of  human  disorders.  The  Company  sells  these  human  health  pharmaceutical  products
primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy
benefit managers and other institutions. Human health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at
physician offices. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities.

The Animal Health segment discovers, develops, manufactures and markets a wide range of veterinary pharmaceutical and vaccine products, as well as
health management solutions and services, for the prevention, treatment and control of disease in all major livestock and companion animal species. The Company
also  offers  an  extensive  suite  of  digitally  connected  identification,  traceability  and  monitoring  products.  The  Company  sells  its  products  to  veterinarians,
distributors and animal producers.

The Company previously had a Healthcare Services segment that provided services and solutions focused on engagement, health analytics and clinical

services to improve the value of care delivered to patients. The Company divested the remaining businesses in this segment in the first quarter of 2020.

The Company previously had an Alliances segment that primarily included activity from the Company’s relationship with AstraZeneca LP related to

sales of Nexium and Prilosec, which concluded in 2018.

Planned Spin-Off of Women’s Health, Biosimilars and Established Brands into a New Company

In  February  2020, Merck  announced  its  intention  to  spin-off  products  from  its women’s  health,  biosimilars  and  established  brands  businesses  into  a
new, independent, publicly traded company named Organon & Co. (Organon) through a distribution of Organon’s publicly traded stock to Company shareholders.
The distribution is expected to qualify as tax-free to the Company and its shareholders for U.S. federal income tax purposes. The established brands included in the
transaction consist of dermatology, non-opioid pain management, respiratory, and select cardiovascular products including Zetia and Vytorin, as well as the rest of
Merck’s diversified brands franchise. Merck’s existing research pipeline programs will continue to be owned and developed within Merck as planned. Organon
will  have  development  capabilities  initially  focused  on  late-stage  development  and  life-cycle  management  and  is  expected  over  time  to  develop  research
capabilities in selected therapeutic areas. The spin-off is expected to be completed late in the second quarter of 2021, subject to market and certain other conditions.
Subsequent to the spin-off, the historical results of the women’s health, biosimilars and established brands businesses will be reflected as discontinued operations in
the Company’s consolidated financial statements.

2.    Summary of Accounting Policies

Principles  of  Consolidation  —  The  consolidated  financial  statements  include  the  accounts  of  the  Company  and  all  of  its  subsidiaries  in  which  a
controlling interest is maintained. Intercompany balances and transactions are eliminated. Controlling interest is determined by majority ownership interest and the
absence of substantive third-party participating rights or, in the case of variable interest entities, by majority exposure to expected losses, residual returns or both.
For those consolidated subsidiaries where Merck ownership is less than 100%, the outside shareholders’ interests are shown as Noncontrolling interests in equity.
Investments in affiliates

83

Table of Contents

over which the Company has significant influence but not a controlling interest, such as interests in entities owned equally by the Company and a third party that
are under shared control, are carried on the equity basis.

Acquisitions — In a business combination, the acquisition method of accounting requires that the assets acquired and liabilities assumed be recorded as
of the date of the acquisition at their respective fair values with limited exceptions. Assets acquired and liabilities assumed in a business combination that arise
from  contingencies  are  generally  recognized  at  fair  value.  If  fair  value  cannot  be  determined,  the  asset  or  liability  is  recognized  if  probable  and  reasonably
estimable; if these criteria are not met, no asset or liability is recognized. Fair value is defined as the exchange price that would be received for an asset or paid to
transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the
measurement date. Accordingly, the Company may be required to value assets at fair value measures that do not reflect the Company’s intended use of those assets.
Any excess of the purchase price (consideration transferred) over the estimated fair values of net assets acquired is recorded as goodwill. Transaction costs and
costs to restructure  the acquired  company are  expensed  as incurred.  The operating  results of the acquired  business are  reflected  in the Company’s consolidated
financial statements after the date of the acquisition. If the Company determines the assets acquired do not meet the definition of a business under the acquisition
method  of  accounting,  the  transaction  will  be  accounted  for  as  an  acquisition  of  assets  rather  than  a  business  combination  and,  therefore,  no  goodwill  will  be
recorded.  In  an  asset  acquisition,  acquired  in-process  research  and  development  (IPR&D)  with  no  alternative  future  use  is  charged  to  expense  and  contingent
consideration is not recognized at the acquisition date.

Foreign  Currency  Translation  —  The  net  assets  of  international  subsidiaries  where  the  local  currencies  have  been  determined  to  be  the  functional
currencies  are  translated  into U.S. dollars  using current  exchange  rates.  The  U.S. dollar  effects  that  arise  from  translating  the net  assets  of these  subsidiaries  at
changing rates are recorded in the foreign currency translation account, which is included in Accumulated other comprehensive income (loss) (AOCI) and reflected
as a separate component of equity. For those subsidiaries that operate in highly inflationary economies and for those subsidiaries where the U.S. dollar has been
determined  to  be  the  functional  currency,  non-monetary  foreign  currency  assets  and  liabilities  are  translated  using  historical  rates,  while  monetary  assets  and
liabilities are translated at current rates, with the U.S. dollar effects of rate changes included in Other (income) expense, net.

Cash Equivalents — Cash equivalents are comprised of certain highly liquid investments with original maturities of less than three months.

Inventories — Inventories are valued at the lower of cost or net realizable value. The cost of a substantial majority of U.S. pharmaceutical and vaccine
inventories is determined using the last-in, first-out (LIFO) method for both financial reporting and tax purposes. The cost of all other inventories is determined
using the first-in, first-out (FIFO) method. Inventories consist of currently marketed products, as well as certain inventories produced in preparation for product
launches that are considered to have a high probability of regulatory approval. In evaluating the recoverability of inventories produced in preparation for product
launches, the Company considers the likelihood that revenue will be obtained from the future sale of the related inventory together with the status of the product
within the regulatory approval process.

Investments —  Investments  in  marketable  debt  securities  classified  as  available-for-sale  are  reported  at  fair  value.  Fair  values  of  the  Company’s
investments in marketable debt securities are determined using quoted market prices in active markets for identical assets or liabilities or quoted prices for similar
assets or liabilities or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Changes in fair value that are considered temporary are reported net of tax in Other Comprehensive Income (OCI). The Company considers available evidence in
evaluating potential impairments of its investments in marketable debt securities, including the duration and extent to which fair value is less than cost. An other-
than-temporary impairment has occurred if the Company does not expect to recover the entire amortized cost basis of the marketable debt security. If the Company
does not intend to sell the impaired debt security, and it is not more likely than not it will be required to sell the debt security before the recovery of its amortized
cost basis, the amount of the other-than-temporary impairment recognized in earnings, recorded in Other (income) expense, net, is limited to the portion attributed
to credit loss. The remaining portion of the other-than-temporary impairment related

84

Table of Contents

to other factors is recognized in OCI. Realized gains and losses for debt securities are included in Other (income) expense, net.

Investments in publicly traded equity securities are reported at fair value determined using quoted market prices in active markets for identical assets or
quoted prices for similar assets or other inputs that are observable or can be corroborated by observable market data. Changes in fair value are included in Other
(income) expense, net. Investments in equity securities without readily determinable  fair values are recorded at cost, plus or minus subsequent observable price
changes in orderly transactions for identical or similar investments, minus impairments. Such adjustments are recognized in Other (income) expense, net. Realized
gains and losses for equity securities are included in Other (income) expense, net.

Revenue Recognition — Recognition of revenue requires evidence of a contract, probable collection of sales proceeds and completion of substantially
all  performance  obligations.  Merck  acts  as  the  principal  in  substantially  all  of  its  customer  arrangements  and  therefore  records  revenue  on  a  gross  basis.  The
majority  of  the  Company’s  contracts  related  to  the  Pharmaceutical  and  Animal  Health  segments  have  a  single  performance  obligation  -  the  promise  to  transfer
goods. Shipping is considered immaterial in the context of the overall customer arrangement and damages or loss of goods in transit are rare. Therefore, shipping is
not deemed a separately recognized performance obligation.

The vast majority of revenues from sales of products are recognized at a point in time when control of the goods is transferred to the customer, which
the Company has determined is when title and risks and rewards of ownership transfer to the customer and the Company is entitled to payment. The Company
recognizes  revenue  from  the  sales  of  vaccines  to  the  Federal  government  for  placement  into  vaccine  stockpiles  in  accordance  with  Securities  and  Exchange
Commission (SEC) Interpretation, Commission Guidance Regarding Accounting for Sales of Vaccines and BioTerror Countermeasures to the Federal Government
for  Placement  into  the  Pediatric  Vaccine  Stockpile  or  the  Strategic  National  Stockpile.  This  interpretation  allows  companies  to  recognize  revenue  for  sales  of
vaccines into U.S. government stockpiles even though these sales might not meet the criteria for revenue recognition under other accounting guidance. For certain
services in the Animal Health segment, revenue is recognized over time, generally ratably over the contract term as services are provided. These service revenues
are not material.

The nature of the Company’s business gives rise to several types of variable consideration including discounts and returns, which are estimated at the

time of sale generally using the expected value method, although the most likely amount method is used for prompt pay discounts.

In the United States, sales discounts are issued to customers at the point-of-sale, through an intermediary wholesaler (known as chargebacks), or in the
form of rebates. Additionally, sales are generally made with a limited right of return under certain conditions. Revenues are recorded net of provisions for sales
discounts and returns, which are established at the time of sale. In addition, revenues are recorded net of time value of money discounts if collection of accounts
receivable is expected to be in excess of one year.

The  U.S.  provision  for  aggregate  customer  discounts  covering  chargebacks  and  rebates  was  $13.1  billion  in  2020,  $11.8  billion  in  2019  and  $10.7
billion  in  2018.  Chargebacks  are  discounts  that  occur  when  a  contracted  customer  purchases  through  an  intermediary  wholesaler.  The  contracted  customer
generally  purchases  product  from  the  wholesaler  at  its  contracted  price  plus  a  mark-up.  The  wholesaler,  in  turn,  charges  the  Company  back  for  the  difference
between the price initially paid by the wholesaler and the contract price paid to the wholesaler by the customer. The provision for chargebacks is based on expected
sell-through levels by the Company’s wholesale customers to contracted customers, as well as estimated wholesaler inventory levels. Rebates are amounts owed
based upon definitive contractual agreements or legal requirements with private sector and public sector (Medicaid and Medicare Part D) benefit providers, after
the final dispensing of the product by a pharmacy to a benefit plan participant. The provision for rebates is based on expected patient usage, as well as inventory
levels in the distribution channel to determine the contractual obligation to the benefit providers. The Company uses historical customer segment utilization mix,
sales forecasts, changes to product mix and price, inventory levels in the distribution channel, government pricing calculations and prior payment history in order to
estimate the expected provision. Amounts accrued for aggregate customer discounts are evaluated on a quarterly basis through comparison of information provided
by the wholesalers, health maintenance organizations, pharmacy benefit managers, federal and state agencies, and other customers to the amounts accrued. The
accrued balances relative to the provisions for chargebacks and rebates included in Accounts receivable and Accrued and other current liabilities were $249

85

Table of Contents

million and $2.9 billion, respectively, at December 31, 2020 and were $233 million and $2.2 billion, respectively, at December 31, 2019.

Outside of the United States, variable consideration in the form of discounts and rebates are a combination of commercially-driven discounts in highly
competitive product classes, discounts required to gain or maintain reimbursement, or legislatively mandated rebates. In certain European countries, legislatively
mandated rebates are calculated based on an estimate of the government’s total unbudgeted spending and the Company’s specific payback obligation. Rebates may
also be required based on specific product sales thresholds. The Company applies an estimated factor against its actual invoiced sales to represent the expected
level of future discount or rebate obligations associated with the sale.

The  Company  maintains  a  returns  policy  that  allows  its  U.S.  pharmaceutical  customers  to  return  product  within  a  specified  period  prior  to  and
subsequent to the expiration date (generally, three to six months before and 12 months after product expiration). The estimate of the provision for returns is based
upon historical experience with actual returns. Additionally, the Company considers factors such as levels of inventory in the distribution channel, product dating
and  expiration  period,  whether  products  have  been  discontinued,  entrance  in  the  market  of  generic  competition,  changes  in  formularies  or  launch  of  over-the-
counter products, among others. Outside of the United States, returns are only allowed in certain countries on a limited basis.

Merck’s  payment  terms  for  U.S.  pharmaceutical  customers  are  typically  36  days  from  receipt  of  invoice  and  for  U.S.  animal  health  customers  are
typically 30 days from receipt of invoice; however, certain products, including Keytruda, have longer payment terms, some of which are up to 90 days. Outside of
the United States, payment terms are typically 30 days to 90 days, although certain markets have longer payment terms.

See Note 18 for disaggregated revenue disclosures.

Depreciation  —  Depreciation  is  provided  over  the  estimated  useful  lives  of  the  assets,  principally  using  the  straight-line  method.  For  tax  purposes,
accelerated tax methods are used. The estimated useful lives primarily range from 25 to 45 years for Buildings, and from 3 to 15 years for Machinery, equipment
and office furnishings. Depreciation expense was $1.7 billion in 2020, $1.7 billion in 2019 and $1.4 billion in 2018.

Advertising  and  Promotion  Costs  — Advertising  and  promotion  costs  are  expensed  as  incurred.  The  Company  recorded  advertising  and  promotion

expenses of $2.0 billion in 2020, $2.1 billion in 2019 and $2.1 billion in 2018.

Software Capitalization — The Company capitalizes certain costs incurred in connection with obtaining or developing internal-use software including
external  direct  costs  of  material  and  services,  and  payroll  costs  for  employees  directly  involved  with  the  software  development.  These  costs  are  included  in
Property,  plant  and  equipment.  In  addition,  the  Company  capitalizes  certain  costs  incurred  to  implement  a  cloud  computing  arrangement  that  is  considered  a
service agreement, which are included in Other Assets. Capitalized software costs are being amortized over periods ranging from 3 to 10 years, with the longer
lives  generally  associated  with  enterprise-wide  projects  implemented  over  multiple  years.  Costs  incurred  during  the  preliminary  project  stage  and  post-
implementation stage, as well as maintenance and training costs, are expensed as incurred.

Goodwill  —  Goodwill  represents  the  excess  of  the  consideration  transferred  over  the  fair  value  of  net  assets  of  businesses  acquired.  Goodwill  is
assigned to reporting units and evaluated for impairment on at least an annual basis, or more frequently if impairment indicators exist, by first assessing qualitative
factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the Company concludes it is more
likely than not that the fair value of a reporting unit is less than its carrying amount, a quantitative fair value test is performed. If the carrying value of a reporting
unit is greater than its fair value, a goodwill impairment charge will be recorded for the difference (up to the carrying value of goodwill).

Acquired Intangibles — Acquired intangibles include products and product rights, licenses, trade names and patents, which are initially recorded at fair
value, assigned an estimated useful life, and amortized primarily on a straight-line basis over their estimated useful lives ranging from 2 to 24 years (see Note 8).
The Company periodically evaluates whether current facts or circumstances indicate that the carrying values of its acquired intangibles may not be recoverable. If
such circumstances are determined to exist, an estimate of the undiscounted

86

Table of Contents

future  cash  flows  of  these  assets,  or  appropriate  asset  groupings,  is  compared  to  the  carrying  value  to  determine  whether  an  impairment  exists.  If  the  asset  is
determined to be impaired, the loss is measured based on the difference between the carrying value of the intangible asset and its fair value, which is determined
based on the net present value of estimated future cash flows.

Acquired In-Process Research and Development — IPR&D that the Company acquires in conjunction with the acquisition of a business represents the
fair value assigned to incomplete research projects which, at the time of acquisition, have not reached technological feasibility. The amounts are capitalized and are
accounted for as indefinite-lived intangible assets, subject to impairment testing until completion or abandonment of the projects. Upon successful completion of
each project, Merck will make a determination as to the then-useful life of the intangible asset, generally determined by the period in which the substantial majority
of the cash flows are expected to be generated, and begin amortization. The Company evaluates IPR&D for impairment at least annually, or more frequently if
impairment indicators exist, by performing a quantitative test that compares the fair value of the IPR&D intangible asset with its carrying value. If the fair value is
less than the carrying amount, an impairment loss is recognized in operating results.

Contingent Consideration — Certain of the Company’s acquisitions involve the potential for future payment of consideration that is contingent upon the
achievement of performance milestones, including product development milestones and royalty payments on future product sales. If the transaction is accounted
for as an acquisition of a business, the fair value of contingent consideration liabilities is determined at the acquisition date using unobservable inputs. These inputs
include the estimated amount and timing of projected cash flows, the probability of success (achievement of the contingent event) and the risk-adjusted discount
rate used to present value the probability-weighted cash flows. Subsequent to the acquisition date, at each reporting period until the contingency is resolved, the
contingent consideration liability is remeasured at current fair value with changes (either expense or income) recorded in earnings. Significant events that increase
or  decrease  the  probability  of  achieving  development  and  regulatory  milestones  or  that  increase  or  decrease  projected  cash  flows  will  result  in  corresponding
increases or decreases in the fair values of the related contingent consideration obligations. If the transaction is accounted for as an acquisition of an asset rather
than  a  business,  contingent  consideration  is  not  recognized  at  the  acquisition  date.  In  these  instances,  product  development  milestones  are  recognized  upon
achievement and sales-based milestones are recognized when the milestone is deemed probable by the Company of being achieved.

Research and Development — Research and development is expensed as incurred. Nonrefundable advance payments for goods and services that will be
used in future research and development activities are expensed when the activity has been performed or when the goods have been received rather than when the
payment is made. Research and development expenses include restructuring costs and IPR&D impairment charges. In addition, research and development expenses
include  expense  or  income  related  to  changes  in  the  estimated  fair  value  measurement  of  liabilities  for  contingent  consideration.  Research  and  development
expenses also include upfront and milestone payments related to asset acquisitions and licensing transactions involving clinical development programs that have
not yet received regulatory approval.

Collaborative Arrangements — Merck has entered into collaborative arrangements that provide the Company with varying rights to develop, produce
and market products together with its collaborative partners. When Merck is the principal on sales transactions with third parties, the Company recognizes sales,
cost of sales and selling, general and administrative expenses on a gross basis. Profit sharing amounts it pays to its collaborative partners are recorded within Cost
of sales.  When  the  collaborative  partner  is  the  principal  on  sales  transactions  with  third  parties,  the  Company  records  profit  sharing  amounts  received  from  its
collaborative partners as alliance revenue (within Sales). Alliance revenue is recorded net of cost of sales and includes an adjustment to share commercialization
costs between the partners in accordance with the collaboration agreement. The adjustment is determined by comparing the commercialization costs Merck has
incurred directly and reported within Selling, general and administrative expenses with the costs the collaborative partner has incurred. Research and development
costs Merck incurs related to collaborations are recorded within Research and development expenses. Cost reimbursements to the collaborative partner or payments
received from the collaborative partner to share these costs pursuant to the terms of the collaboration agreements are recorded as increases or decreases to Research
and development expenses.

87

Table of Contents

In  addition,  the  terms  of  the  collaboration  agreements  may  require  the  Company  to  make  payments  based  upon  the  achievement  of  certain
developmental,  regulatory  approval  or  commercial  milestones.  Upfront  and  milestone  payments  payable  by  Merck  to  collaborative  partners  prior  to  regulatory
approval are expensed as incurred and included in Research and development expenses. Payments due to collaborative partners upon or subsequent to regulatory
approval are capitalized and amortized over the estimated useful life of the corresponding intangible asset to Cost of sales provided that future cash flows support
the amounts capitalized. Sales-based milestones payable by Merck to collaborative partners are accrued and capitalized, subject to cumulative amortization catch-
up,  when  probable  of  being  achieved.  The  amortization  catch-up  is  calculated  either  from  the  time  of  the  first  regulatory  approval  for  indications  that  were
unapproved at the time the collaboration was formed, or from time of the formation of the collaboration for approved products. The related intangible asset that is
recognized is amortized to Cost of sales over its remaining useful life, subject to impairment testing.

Share-Based Compensation — The Company expenses all share-based payments to employees over the requisite service period based on the grant-date

fair value of the awards.

Restructuring  Costs  —  The  Company  records  liabilities  for  costs  associated  with  exit  or  disposal  activities  in  the  period  in  which  the  liability  is
incurred.  In  accordance  with  existing  benefit  arrangements,  employee  termination  costs  are  accrued  when  the  restructuring  actions  are  probable  and  estimable.
When accruing these costs, the Company will recognize the amount within a range of costs that is the best estimate within the range. When no amount within the
range is a better estimate than any other amount, the Company recognizes the minimum amount within the range. Costs for one-time termination benefits in which
the employee is required to render service until termination in order to receive the benefits are recognized ratably over the future service period.

Contingencies  and  Legal  Defense  Costs  —  The  Company  records  accruals  for  contingencies  and  legal  defense  costs  expected  to  be  incurred  in

connection with a loss contingency when it is probable that a liability has been incurred and the amount can be reasonably estimated.

Taxes on Income — Deferred taxes are recognized for the future tax effects of temporary differences between financial and income tax reporting based
on enacted tax laws and rates. The Company evaluates tax positions to determine whether the benefits of tax positions are more likely than not of being sustained
upon audit based on the technical merits of the tax position. For tax positions that are more likely than not of being sustained upon audit, the Company recognizes
the largest amount of the benefit that is greater than 50% likely of being realized upon ultimate settlement in the financial statements. For tax positions that are not
more likely than not of being sustained upon audit, the Company does not recognize any portion of the benefit in the financial statements. The Company recognizes
interest and penalties associated with uncertain tax positions as a component of Taxes on income. The Company accounts for the tax effects of the tax on global
intangible low-taxed income (GILTI) of certain foreign subsidiaries in the income tax provision in the period the tax arises.

Use of Estimates — The consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States
(GAAP) and, accordingly, include certain amounts that are based on management’s best estimates and judgments. Estimates are used when accounting for amounts
recorded  in  connection  with  acquisitions,  including  initial  fair  value  determinations  of  assets  and  liabilities  (primarily  IPR&D,  other  intangible  assets  and
contingent  consideration),  as  well  as  subsequent  fair  value  measurements.  Additionally,  estimates  are  used  in  determining  such  items  as  provisions  for  sales
discounts  and  returns,  depreciable  and  amortizable  lives,  recoverability  of  inventories,  including  those  produced  in  preparation  for  product  launches,  amounts
recorded for contingencies, environmental liabilities, accruals for contingent sales-based milestone payments and other reserves, pension and other postretirement
benefit plan assumptions, share-based compensation assumptions, restructuring costs, impairments of long-lived assets (including intangible assets and goodwill)
and investments, and taxes on income. Because of the uncertainty inherent in such estimates, actual results may differ from these estimates.

Reclassifications — Certain reclassifications have been made to prior year amounts to conform to the current year presentation.

88

Table of Contents

Recently Adopted Accounting Standards — In June 2016, the Financial Accounting Standards Board (FASB) issued new guidance on the accounting for
credit losses on financial instruments. The new guidance introduces an expected loss model for estimating credit losses, replacing the incurred loss model. The new
guidance  also  changes  the  impairment  model  for  available-for-sale  debt  securities,  requiring  the  use  of  an  allowance  to  record  estimated  credit  losses  (and
subsequent  recoveries).  The  Company  adopted  the  new  guidance  effective  January  1,  2020.  There  was  no  impact  to  the  Company’s  consolidated  financial
statements upon adoption.

In November 2018, the FASB issued new guidance for collaborative arrangements intended to reduce diversity in practice by clarifying whether certain
transactions between collaborative arrangement participants should be accounted for under revenue recognition guidance (ASC 606). The Company retrospectively
adopted the new guidance effective January 1, 2020, which resulted in minor changes to the presentation of information related to the Company’s collaborative
arrangements (see Note 4 and Note 18).

In  December  2019,  the  FASB  issued  amended  guidance  on  the  accounting  and  reporting  of  income  taxes.  The  guidance  is  intended  to  simplify  the
accounting for income taxes by removing exceptions related to certain intraperiod tax allocations and deferred tax liabilities; clarifying guidance primarily related
to evaluating the step-up tax basis for goodwill in a business combination; and reflecting enacted changes in tax laws or rates in the annual effective tax rate. The
Company adopted the new guidance effective January 1, 2021. There was no impact to the Company’s consolidated financial statements upon adoption.

In January 2020, the FASB issued new guidance intended to clarify certain interactions between accounting standards related to equity securities, equity
method investments and certain derivatives. The guidance addresses accounting for the transition into and out of the equity method of accounting and measuring
certain purchased options and forward contracts to acquire investments. The Company adopted the new guidance effective January 1, 2021. There was no impact to
the Company’s consolidated financial statements upon adoption.

Recently Issued Accounting Standard Not Yet Adopted — In March 2020, the FASB issued optional guidance to ease the potential burden in accounting
for  (or  recognizing  the  effects  of)  reference  rate  reform  on  financial  reporting  and  subsequently  issued  clarifying  amendments.  The  guidance  provides  optional
expedients  and  exceptions  for  applying  GAAP  to  contracts,  hedging  relationships,  and  other  transactions  that  reference  the  London  Interbank  Offered  Rate
(LIBOR)  or  another  reference  rate  expected  to  be  discontinued  because  of  reference  rate  reform.  The  optional  guidance  is  effective  upon  issuance  and  can  be
applied on a prospective basis at any time between January 1, 2020 through December 31, 2022. The Company is currently evaluating the impact of adoption on its
consolidated financial statements.

3.    Acquisitions, Divestitures, Research Collaborations and License Agreements

The Company continues to pursue acquisitions and the establishment of external alliances such as research collaborations and licensing agreements to
complement  its  internal  research  capabilities.  These  arrangements  often  include  upfront  payments,  as  well  as  expense  reimbursements  or  payments  to  the  third
party, and milestone, royalty or profit share arrangements, contingent upon the occurrence of certain future events linked to the success of the asset in development.
The  Company  also  reviews  its  marketed  products  and  pipeline  to  examine  candidates  which  may  provide  more  value  through  out-licensing  and,  as  part  of  its
portfolio  assessment  process,  may  also  divest  certain  assets.  Pro  forma  financial  information  for  acquired  businesses  is  not  presented  if  the  historical  financial
results of the acquired entity are not significant when compared with the Company’s financial results.

2020 Transactions

In December 2020, Merck acquired OncoImmune, a privately held, clinical-stage biopharmaceutical company, for an upfront payment of $423 million.
In  addition,  OncoImmune  shareholders  will  be  eligible  to  receive  up  to  $255  million  of  future  contingent  regulatory  approval  milestone  payments  and  tiered
royalties ranging from 10% to 20%. OncoImmune’s lead therapeutic candidate MK-7110 (also known as CD24Fc) is being evaluated for the treatment of patients
hospitalized  with  coronavirus  disease  2019  (COVID-19).  The  transaction  was  accounted  for  as  an  acquisition  of  an  asset.  Under  the  agreement,  prior  to  the
completion  of  the  acquisition,  OncoImmune  spun-out  certain  rights  and  assets  unrelated  to  the  MK-7110  program  to  a  new  entity  owned  by  the  existing
shareholders of OncoImmune. In connection with the closing of the acquisition, Merck invested $50 million for a 20% ownership interest in the new entity, which
was valued at $33 million resulting in a $17 million premium. Merck also

89

Table of Contents

recognized other net liabilities of $22 million. The Company recorded Research and development expenses of $462 million in 2020 related to this transaction.

Also  in  December  2020,  Merck  acquired  VelosBio  Inc.  (VelosBio),  a  privately  held,  clinical-stage  biopharmaceutical  company,  for  $2.8  billion.
VelosBio’s lead investigational candidate is MK-2140 (formerly known as VLS-101), an antibody-drug conjugate targeting receptor tyrosine kinase-like orphan
receptor 1 (ROR1) that is currently being evaluated for the treatment of patients with hematologic malignancies and solid tumors. The transaction was accounted
for as an acquisition of an asset. Merck recorded net assets of $180 million (primarily cash) and Research and development expenses of $2.7 billion in 2020 related
to the transaction.

In  September  2020,  Merck  and  Seagen  Inc.  (Seagen,  formerly  known  as  Seattle  Genetics,  Inc.)  announced  an  oncology  collaboration  to  globally
develop and commercialize Seagen’s ladiratuzumab vedotin (MK-6440), an investigational antibody-drug conjugate targeting LIV-1, which is currently in Phase 2
clinical  trials  for  breast  cancer  and  other  solid  tumors.  The  collaboration  will  pursue  a  broad  joint  development  program  evaluating  ladiratuzumab  vedotin  as
monotherapy  and  in  combination  with  Keytruda (pembrolizumab)  in  triple-negative  breast  cancer,  hormone  receptor-positive  breast  cancer  and  other  LIV-1-
expressing solid tumors. The companies will equally share profits worldwide. Under the terms of the agreement, Merck made an upfront payment of $600 million
and  a  $1.0  billion  equity  investment  in  5  million  shares  of  Seagen  common  stock  at  a  price  of  $200  per  share.  Merck  recorded  $616  million  in  Research and
development expenses in 2020 related to this transaction reflecting the upfront payment as well as a $16 million premium relating to the equity shares based on the
price  of  Seagen  common  stock  on  the  closing  date.  Seagen  is  also  eligible  to  receive  future  contingent  milestone  payments  of  up  to  $2.6  billion,  including
$850 million in development milestones and $1.75 billion in sales-based milestones.

Concurrent  with  the  above  transaction,  Seagen  granted  Merck  an  exclusive  license  to  commercialize  Tukysa  (tucatinib),  a  small  molecule  tyrosine
kinase inhibitor, for the treatment of HER2-positive cancers, in Asia, the Middle East and Latin America and other regions outside of the United States, Canada and
Europe. Merck will be responsible for marketing applications seeking approval in its territories, supported by the positive results from the HER2CLIMB clinical
trial.  Merck  will  also  co-fund  a  portion  of  the  Tukysa  global  development  plan,  which  encompasses  several  ongoing  and  planned  trials  across  HER2-positive
cancers, including breast, colorectal, gastric and other cancers set forth in a global product development plan. Merck will solely fund and conduct country-specific
clinical  trials  necessary  to  support  anticipated  regulatory  applications  in  its  territories.  Under  the  terms  of  the  agreement,  Merck  made  upfront  payments
aggregating  $210  million,  which  were  recorded  as  Research and development expenses  in  2020.  Seagen  is  also  eligible  to  receive  future  contingent  regulatory
approval milestones of up to $65 million and will receive tiered royalties ranging from 20% to 33% based on annual sales levels of Tukysa in Merck’s territories.

Additionally  in  September  2020,  Merck  acquired  a  biologics  manufacturing  facility  located  in  Dunboyne,  Ireland  from  Takeda  Pharmaceutical
Company Limited for €256 million ($302 million). The transaction was accounted for as an acquisition of an asset. Merck recorded property, plant and equipment
of $289 million and other net assets of $13 million. There are no future contingent payments associated with the acquisition.

In July 2020, Merck acquired the U.S. rights to Sentinel Flavor Tabs and Sentinel Spectrum Chews from Virbac Corporation for $410 million. Sentinel
products provide protection against common parasites in dogs. The transaction was accounted for as an acquisition of an asset. Merck recognized intangible assets
of $401 million related to currently marketed products and inventory of $9 million at the acquisition date. The estimated fair values of the identifiable intangible
assets  related  to  currently  marketed  products  were  determined  using  an  income  approach.  Actual  cash  flows  are  likely  to  be  different  than  those  assumed.  The
intangible assets related to currently marketed products will be amortized over their estimated useful lives of 15 years. There are no future contingent payments
associated with the acquisition.

Also in July 2020, Merck and Ridgeback Biotherapeutics LP (Ridgeback Bio), a closely held biotechnology company, closed a collaboration agreement
to develop molnupiravir (MK-4482, also known as EIDD-2801), an orally available antiviral candidate in clinical development for the treatment of patients with
COVID-19.  Merck  gained  exclusive  worldwide  rights  to  develop  and  commercialize  molnupiravir  and  related  molecules.  Under  the  terms  of  the  agreement,
Ridgeback Bio received an upfront payment and also is eligible to receive future contingent payments dependent upon the achievement of certain developmental
and regulatory approval milestones, as well as a share of the net profits of molnupiravir and related molecules, if approved. Merck

90

Table of Contents

and  Ridgeback  are  committed  to  ensure  that  any  medicines  developed  for  SARS-CoV-2  (the  causative  agent  of  COVID-19)  will  be  accessible  and  affordable
globally.

In  June  2020,  Merck  acquired  privately  held  Themis  Bioscience  GmbH  (Themis),  a  company  focused  on  vaccines  (including  a  COVID-19  vaccine
candidate, V591) and immune-modulation  therapies for infectious diseases and cancer for $366 million. The acquisition originally provided for Merck to make
additional contingent payments of up to $740 million. The transaction was accounted for as an acquisition of a business. The Company determined the fair value of
the contingent consideration was $97 million at the acquisition date utilizing a probability-weighted estimated cash flow stream using an appropriate discount rate
dependent on the nature and timing of the milestone payments. Merck recognized intangible assets for IPR&D of $136 million, cash of $59 million, deferred tax
assets of $70 million and other net liabilities of $32 million. The excess of the consideration transferred over the fair value of net assets acquired of $230 million
was recorded as goodwill that was allocated to the Pharmaceutical segment and is not deductible for tax purposes. The fair values of the identifiable intangible
assets  related  to  IPR&D  were  determined  using  an  income  approach.  Actual  cash  flows  are  likely  to  be  different  than  those  assumed.  In  January  2021,  the
Company announced it was discontinuing development of V591 as discussed below. As a result, in 2020, the Company recorded an IPR&D impairment charge of
$90 million within Research and development expenses. The Company also recorded a reduction in Research and development expenses resulting from a decrease
in the related liability for contingent consideration of $45 million since future contingent milestone payments have been reduced to $450 million in the aggregate,
including up to $60 million for development milestones, up to $196 million for regulatory approval milestones, and up to $194 million for commercial milestones.

In May 2020, Merck  and the International  AIDS Vaccine  Initiative,  Inc. (IAVI), a nonprofit  scientific  research  organization  dedicated  to addressing
urgent,  unmet  global  health  challenges,  announced  a  collaboration  to  develop  V590,  an  investigational  vaccine  against  SARS-CoV-2  being  studied  for  the
prevention of COVID-19. The agreement provided for an upfront payment by Merck of $6.5 million and also provided for future contingent payments based on
sales. Merck also signed an agreement with the Biomedical Advanced Research and Development Authority (BARDA), part of the office of the Assistant Secretary
for Preparedness and Response within an agency of the United States Department of Health and Human Services, to provide initial funding support to Merck for
this effort. In January 2021, the Company announced it was discontinuing development of V590 as discussed below.

In  January  2021, the  Company  announced  the  discontinuation  of  the  development  programs  for  its  COVID-19  vaccine  candidates,  V590 and  V591,
following Merck’s review of findings from Phase 1 clinical studies for the vaccines. In these studies, both V590 and V591 were generally well tolerated, but the
immune  responses  were  inferior  to  those  seen  following  natural  infection  and  those  reported  for  other  SARS-CoV-2/COVID-19  vaccines.  Due  to  the
discontinuation,  the  Company  recorded  a  charge  of  $305  million  in  2020,  of  which  $260  million  was  reflected  in  Cost  of  sales and  related  to  fixed-asset  and
materials  write-offs,  as  well  as  the  recognition  of  liabilities  for  purchase  commitments. The  remaining  $45  million  of  costs  were  reflected  in  Research  and
development expenses and represent amounts related to the Themis acquisition noted above (an IPR&D impairment charge, partially offset by a reduction in the
related liability for contingent consideration).

In  January  2020,  Merck  acquired  ArQule,  Inc.  (ArQule),  a  publicly  traded  biopharmaceutical  company  focused  on  kinase  inhibitor  discovery  and
development  for  the  treatment  of  patients  with  cancer  and  other  diseases.  Total  consideration  paid  of  $2.7  billion  included  $138  million  of  share-based
compensation  payments  to  settle  equity  awards  attributable  to  precombination  service  and  cash  paid  for  transaction  costs  on  behalf  of  ArQule.  The  Company
incurred $95 million of transaction costs directly related to the acquisition of ArQule, consisting almost entirely of share-based compensation payments to settle
non-vested equity awards attributable to postcombination service. These costs were included in Selling, general and administrative expenses in 2020. ArQule’s
lead investigational candidate, MK-1026 (formerly known as ARQ 531), is a novel, oral Bruton’s tyrosine kinase (BTK) inhibitor currently being evaluated for the
treatment of B-cell malignancies. The transaction was accounted for as an acquisition of a business.

91

Table of Contents

The estimated fair value of assets acquired and liabilities assumed from ArQule is as follows:

($ in millions)
Cash and cash equivalents
IPR&D MK-1026 (formerly ARQ 531) 
Licensing arrangement for ARQ 087
Deferred income tax liabilities
Other assets and liabilities, net
Total identifiable net assets

(1)

(2)

Goodwill 
Consideration transferred

January 16, 2020

145 
2,280 
80 
(361)
34 
2,178 
512 
2,690 

$

$

(1)    

The estimated fair value of the identifiable intangible asset related to IPR&D was determined using an income approach. The future net cash flows were discounted to present value utilizing

a discount rate of 12.5%. Actual cash flows are likely to be different than those assumed.

(2)    

The goodwill was allocated to the Pharmaceutical segment and is not deductible for tax purposes.

2019 Transactions

In July 2019, Merck acquired Peloton Therapeutics, Inc. (Peloton), a clinical-stage biopharmaceutical company focused on the development of novel
small molecule therapeutic candidates targeting hypoxia-inducible factor-2α (HIF-2α) for the treatment of patients with cancer and other non-oncology diseases.
Peloton’s  lead  candidate,  MK-6482  (formerly  known  as  PT2977),  is  a  novel  investigational  oral  HIF-2α  inhibitor  in  late-stage  development  for  renal  cell
carcinoma. Merck made an upfront payment of $1.2 billion; additionally, former Peloton shareholders will be eligible to receive $50 million upon U.S. regulatory
approval, $50 million upon first commercial sale in the United States, and up to $1.05 billion of sales-based milestones. The transaction was accounted for as an
acquisition of an asset. Merck recorded cash of $157 million, deferred tax liabilities of $52 million, and other net liabilities of $4 million at the acquisition date, as
well as Research and development expenses of $993 million in 2019 related to the transaction.

On April 1, 2019, Merck acquired Antelliq Corporation (Antelliq), a leader in digital animal identification, traceability and monitoring solutions. These
solutions  help  veterinarians,  farmers  and  pet  owners  gather  critical  data  to  improve  management,  health  and  well-being  of  livestock  and  pets.  Merck  paid  $2.3
billion  to  acquire  all  outstanding  shares  of  Antelliq  and  spent  $1.3  billion  to  repay  Antelliq’s  debt.  The  transaction  was  accounted  for  as  an  acquisition  of  a
business.

The estimated fair value of assets acquired and liabilities assumed from Antelliq is as follows:

($ in millions)
Cash and cash equivalents
Accounts receivable
Inventories
Property, plant and equipment
Identifiable intangible assets (useful lives ranging from 18-24 years) 
Deferred income tax liabilities
Other assets and liabilities, net
Total identifiable net assets

(1)

(2)

Goodwill 
Consideration transferred

April 1, 2019

31 
73 
93 
60 
2,689 
(589)
(82)
2,275 
1,376 
3,651 

$

$

(1)       

The estimated fair values of identifiable intangible assets relate primarily to trade names and were determined using an income approach. The future net cash flows were discounted to

present value utilizing a discount rate of 11.5%. Actual cash flows are likely to be different than those assumed.

(2)       

The  goodwill  recognized  is  largely  attributable  to  anticipated  synergies  expected  to  arise  after  the  acquisition  and  was  allocated  to  the  Animal  Health  segment.  The  goodwill  is  not

deductible for tax purposes.

92

Table of Contents

The Company’s results for 2019 include eight months of activity for Antelliq, while the Company’s results in 2020 include 13 months of activity. The
Company incurred $47 million of transaction costs directly related to the acquisition of Antelliq, consisting largely of advisory fees, which are reflected in Selling,
general and administrative expenses in 2019.

Also in April 2019, Merck acquired Immune Design, a late-stage immunotherapy company employing next-generation in vivo approaches to enable the
body’s immune system to fight disease, for $301 million in cash. The transaction was accounted for as an acquisition of a business. Merck recognized intangible
assets of $156 million, cash of $83 million and other net assets of $42 million. The excess of the consideration transferred over the fair value of net assets acquired
of $20 million was recorded as goodwill that was allocated to the Pharmaceutical segment and is not deductible for tax purposes. The fair values of the identifiable
intangible assets related to IPR&D were determined using an income approach. Actual cash flows are likely to be different than those assumed.

2018 Transactions

In  2018,  the  Company  recorded  an  aggregate  charge  of  $423  million  within  Cost  of  sales in  conjunction  with  the  termination  of  a  collaboration
agreement entered into in 2014 with Samsung Bioepis Co., Ltd. (Samsung) for insulin glargine. The charge reflects a termination payment of $155 million, which
represents  the  reimbursement  of  all  fees  previously  paid  by  Samsung  to  Merck  under  the  agreement,  plus  interest,  as  well  as  the  release  of  Merck’s  ongoing
obligations under the agreement. The charge also included fixed asset abandonment charges of $137 million, inventory write-offs of $122 million, as well as other
related costs of $9 million. The termination of this agreement had no impact on the Company’s other collaboration with Samsung.

In June 2018, Merck acquired Viralytics Limited (Viralytics), an Australian publicly traded company focused on oncolytic immunotherapy treatments
for  a  range  of  cancers,  for  AUD  502  million  ($378  million).  The  transaction  provided  Merck  with  full  rights  to  V937  (formerly  known  as  CVA21),  an
investigational oncolytic immunotherapy. The transaction was accounted for as an acquisition of an asset. Merck recorded net assets of $34 million (primarily cash)
at  the  acquisition  date  and  Research  and  development expenses  of  $344  million  in  2018  related  to  the  transaction.  There  are  no  future  contingent  payments
associated with the acquisition.

In March 2018, Merck and Eisai Co., Ltd. (Eisai) entered into a strategic collaboration for the worldwide co-development and co-commercialization of

Lenvima, an orally available tyrosine kinase inhibitor discovered by Eisai (see Note 4).

Remicade/Simponi

In 1998, a subsidiary of Schering-Plough entered into a licensing agreement with Centocor Ortho Biotech Inc. (Centocor), a Johnson & Johnson (J&J)
company, to market Remicade, which is prescribed for the treatment of inflammatory diseases. In 2005, Schering-Plough’s subsidiary exercised an option under its
contract with Centocor for license rights to develop and commercialize Simponi, a fully human monoclonal antibody. The Company has marketing rights to both
products  throughout  Europe,  Russia  and  Turkey.  Remicade lost  market  exclusivity  in  major  European  markets  in  2015 and  the  Company  no longer  has  market
exclusivity in any of its marketing territories. The Company continues to have market exclusivity for Simponi in all of its marketing territories. All profits derived
from Merck’s  distribution  of the two products in these countries  are  equally divided  between Merck and J&J. The Company’s marketing  rights with respect  to
these products will revert to Janssen Pharmaceuticals, Inc. in the second half of 2024.

4.    Collaborative Arrangements

Merck has entered into collaborative arrangements that provide the Company with varying rights to develop, produce and market products together with
its  collaborative  partners.  Both  parties  in  these  arrangements  are  active  participants  and  exposed  to  significant  risks  and  rewards  dependent  on  the  commercial
success of the activities of the collaboration. Merck’s more significant collaborative arrangements are discussed below.

AstraZeneca

In July 2017, Merck and AstraZeneca PLC (AstraZeneca) entered into a global strategic oncology collaboration to co-develop and co-commercialize
AstraZeneca’s Lynparza (olaparib) for multiple cancer types. Lynparza is an oral poly (ADP-ribose) polymerase (PARP) inhibitor currently approved for certain
types of

93

Table of Contents

advanced  ovarian,  breast,  pancreatic  and  prostate  cancers.  The  companies  are  jointly  developing  and  commercializing  Lynparza,  both  as  monotherapy  and  in
combination  trials  with other  potential  medicines.  Independently,  Merck  and AstraZeneca  will develop  and commercialize  Lynparza  in combinations  with their
respective  PD-1  and  PD-L1  medicines,  Keytruda and  Imfinzi.  The  companies  are  also  jointly  developing  and  commercializing  AstraZeneca’s  Koselugo
(selumetinib), an oral, selective inhibitor of MEK, part of the mitogen-activated protein kinase (MAPK) pathway, for multiple indications. In April 2020, Koselugo
was approved by the U.S. Food and Drug Administration (FDA) for the treatment of pediatric patients two years of age and older with neurofibromatosis type 1
who  have  symptomatic,  inoperable  plexiform  neurofibromas.  Under  the  terms  of  the  agreement,  AstraZeneca  and  Merck  will  share  the  development  and
commercialization costs for Lynparza and Koselugo monotherapy and non-PD-L1/PD-1 combination therapy opportunities.

Profits from Lynparza and Koselugo product sales generated through monotherapies or combination therapies are shared equally. Merck will fund all
development and commercialization costs of Keytruda in combination with Lynparza or Koselugo. AstraZeneca will fund all development and commercialization
costs of Imfinzi in combination with Lynparza or Koselugo. AstraZeneca is the principal on Lynparza and Koselugo sales transactions. Merck records its share of
Lynparza and Koselugo product sales, net of cost of sales and commercialization costs, as alliance revenue and its share of development costs associated with the
collaboration as part of Research and development expenses. Reimbursements received from AstraZeneca for research and development expenses are recognized
as reductions to Research and development costs.

As part of the agreement, Merck made an upfront payment to AstraZeneca of $1.6 billion in 2017 and made payments of $750 million over a multi-year
period  for  certain  license  options  (of  which  $250 million  was paid  in  December  2017, $400  million  was paid  in  December  2018 and  $100 million  was paid  in
December  2019).  The  upfront  payment  and  license  option  payments  were  reflected  in  Research and development expenses  in 2017. In addition,  the  agreement
provides for additional contingent payments from Merck to AstraZeneca related to the successful achievement of sales-based and regulatory milestones.

In 2020, Merck  determined  it was probable  that  sales  of Lynparza  in the future  would trigger  $400 million  of sales-based  milestone  payments  from
Merck to AstraZeneca. Accordingly, Merck recorded $400 million of liabilities and corresponding increases to the intangible asset related to Lynparza. Prior to
2020, Merck accrued sales-based milestone payments aggregating $1.0 billion related to Lynparza, of which $550 million, $200 million and $250 million was paid
to AstraZeneca in 2020, 2019 and 2018, respectively. Potential future sales-based milestone payments of $2.7 billion have not yet been accrued as they are not
deemed by the Company to be probable at this time.

In  2020,  2019  and  2018,  Lynparza  received  regulatory  approvals  triggering  capitalized  milestone  payments  of  $160  million,  $60  million  and  $140

million, respectively, in the aggregate from Merck to AstraZeneca. Potential future regulatory milestone payments of $1.4 billion remain under the agreement.

The  intangible  asset  balance  related  to  Lynparza  (which  includes  capitalized  sales-based  and  regulatory  milestone  payments)  was  $1.3  billion  at
December 31, 2020 and is included in Other Intangibles, Net. The amount is being amortized over its estimated useful life through 2028 as supported by projected
future cash flows, subject to impairment testing.

94

Table of Contents

Summarized financial information related to this collaboration is as follows:

Years Ended December 31
Alliance revenue - Lynparza
Alliance revenue - Koselugo
Total alliance revenue

(1)

Cost of sales 
Selling, general and administrative
Research and development

December 31
Receivables from AstraZeneca included in Other current assets
Payables to AstraZeneca included in Accrued and other current liabilities

 (2)

(1)

 Represents amortization of capitalized milestone payments.

(2)

 Includes accrued milestone payments.

Eisai

$

$

$

2020

2019

2018

725  $
8 
733  $

247 
160 
133 

2020

2019

215  $
423 

187 
— 
187 

93 
48 
152 

444  $
— 
444  $

148 
138 
168 

128 
577 

In March 2018, Merck and Eisai Co., Ltd. (Eisai) announced a strategic collaboration for the worldwide co-development and co-commercialization of
Lenvima (lenvatinib), an orally available tyrosine kinase inhibitor discovered by Eisai. Lenvima is currently approved for the treatment of certain types of thyroid
cancer,  hepatocellular  carcinoma,  in  combination  with  everolimus  for  certain  patients  with  renal  cell  carcinoma,  and  in  combination  with  Keytruda for  the
treatment  of  certain  patients  with  endometrial  carcinoma.  Under  the  agreement,  Merck  and  Eisai  will  develop  and  commercialize  Lenvima  jointly,  both  as
monotherapy and in combination with Keytruda. Eisai records Lenvima product sales globally (Eisai is the principal on Lenvima sales transactions), and Merck
and Eisai share applicable profits equally. Merck records its share of Lenvima product sales, net of cost of sales and commercialization costs, as alliance revenue.
Expenses  incurred  during  co-development  are  shared  by  the  two  companies  in  accordance  with  the  collaboration  agreement  and  reflected  in  Research  and
development expenses. Certain expenses incurred solely by Merck or Eisai are not shareable under the collaboration agreement, including costs incurred in excess
of agreed upon caps and costs related to certain combination studies of Keytruda and Lenvima.

Under the agreement, Merck made an upfront payment to Eisai of $750 million in 2018 and agreed to make payments of up to $650 million for certain
option rights through 2021 (of which $325 million was paid in March 2019, $200 million was paid in March 2020 and $125 million is expected to be paid in March
2021). The Company recorded an aggregate charge of $1.4 billion in Research and development expenses in 2018 related to the upfront payment and future option
payments. In addition, the agreement provides for additional contingent payments from Merck to Eisai related to the successful achievement of sales-based and
regulatory milestones.

In 2020, Merck determined it was probable that sales of Lenvima in the future would trigger sales-based milestone payments aggregating $400 million
from Merck to Eisai. Accordingly, Merck recorded liabilities of $400 million and corresponding increases to the intangible asset related to Lenvima. Prior to 2020,
Merck accrued sales-based milestone payments aggregating $950 million related to Lenvima, of which $500 million and $50 million was paid to Eisai in 2020 and
2019,  respectively.  Potential  future  sales-based  milestone  payments  of  $2.6  billion  have  not  yet  been  accrued  as  they  are  not  deemed  by  the  Company  to  be
probable at this time.

In  2020  and  2018,  Lenvima  received  regulatory  approvals  triggering  capitalized  milestone  payments  of  $10  million  and  $250  million,  respectively,

from Merck to Eisai. Potential future regulatory milestone payments of $125 million remain under the agreement.

The  intangible  asset  balance  related  to  Lenvima  (which  includes  capitalized  sales-based  and  regulatory  milestone  payments)  was  $1.1  billion  at
December 31, 2020 and is included in Other Intangibles, Net. The amount is being amortized over its estimated useful life through 2026 as supported by projected
future cash flows, subject to impairment testing.

95

Table of Contents

Summarized financial information related to this collaboration is as follows:

Years Ended December 31
Alliance revenue - Lenvima

 (1)

Cost of sales
Selling, general and administrative
Research and development 

(2)

December 31
Receivables from Eisai included in Other current assets
Payables to Eisai included in Accrued and other current liabilities 
Payables to Eisai included in Other Noncurrent Liabilities 

(4)

(3)

(1) 

Represents amortization of capitalized milestone payments.

(2) 

Amount for 2018 includes $1.4 billion related to the upfront payment and option payments.

(3) 

Includes accrued milestone and future option payments.

(4) 

Includes accrued milestone payments.

Bayer AG

2020

2019

2018

149 

39 
13 
1,489 

$

580  $

404  $

271 
73 
185 

2020

2019

$

157  $
335 
600 

206 
80 
189 

150 
700 
525 

In 2014, the Company entered into a worldwide clinical development collaboration with Bayer AG (Bayer) to market and develop soluble guanylate
cyclase  (sGC)  modulators  including  Bayer’s  Adempas  (riociguat),  which  is  approved  to  treat  pulmonary  arterial  hypertension  and  chronic  thromboembolic
pulmonary  hypertension.  The  two  companies  have  implemented  a  joint  development  and  commercialization  strategy.  The  collaboration  also  includes  clinical
development  of  Bayer’s  Verquvo  (vericiguat),  which  was  approved  by  the  FDA  in  January  2021  to  reduce  the  risk  of  cardiovascular  death  and  heart  failure
hospitalization following a hospitalization for heart failure or need for outpatient intravenous diuretics in adults. Verquvo is under review by regulatory authorities
in other territories including the EU and Japan. Under the agreement, Bayer commercializes Adempas in the Americas, while Merck commercializes in the rest of
the  world.  For  Verquvo,  Merck  will  commercialize  in  the  United  States  and  Bayer  will  commercialize  in  the  rest  of  the  world.  Both  companies  share  in
development costs and profits on sales. Merck records sales of Adempas (and will record sales of Verquvo) in its marketing territories, as well as alliance revenue.
Alliance revenue represents Merck’s share of profits from sales in Bayer’s marketing territories, which are product sales net of cost of sales and commercialization
costs. In addition, the agreement provides for contingent payments from Merck to Bayer related to the successful achievement of sales-based milestones.

Prior to 2020, Merck accrued $725 million of sales-based milestone payments for this collaboration, of which $375 million and $350 million was paid
to Bayer in 2020 and 2018, respectively. Following the 2021 FDA approval of Verquvo noted above, Merck determined it was probable that sales of Adempas and
Verquvo in the future would trigger the remaining $400 million sales-based milestone payment. Accordingly, Merck will record a liability of $400 million and a
corresponding increase in intangible assets related to this collaboration in the first quarter of 2021.

The  intangible  asset  balance  related  to  this  collaboration  (which  includes  the  acquired  intangible  asset  balance,  as  well  as  capitalized  sales-based
milestone payments) was $849 million at December 31, 2020 and is included in Other Intangibles, Net. The amount is being amortized over its estimated useful
life through 2027 as supported by projected future cash flows, subject to impairment testing.

96

Table of Contents

Summarized financial information related to this collaboration is as follows:

Years Ended December 31
Alliance revenue - Adempas
Net sales of Adempas recorded by Merck
Total sales

(1)

Cost of sales 
Selling, general and administrative
Research and development

December 31
Receivables from Bayer included in Other current assets
Payables to Bayer included in Other Noncurrent Liabilities 

(2)

(1)

 Includes amortization of intangible assets.

(2) 

Represents accrued milestone payment.

5.    Restructuring

2020

2019

2018

$

$

$

281  $
220 
501  $

115 
61 
63 

65  $
— 

2020

204  $
215 
419  $

113 
41 
126 

2019
49 
375 

139 
190 
329 

216 
35 
127 

In  early  2019,  Merck  approved  a  new  global  restructuring  program  (Restructuring  Program)  as  part  of  a  worldwide  initiative  focused  on  further
optimizing the Company’s manufacturing and supply network, as well as reducing its global real estate footprint. This program is a continuation of the Company’s
plant rationalization, builds on prior restructuring programs and does not include any actions associated with the planned spin-off of Organon. As the Company
continues  to  evaluate  its  global  footprint  and  overall  operating  model,  it  subsequently  identified  additional  actions  under  the  Restructuring  Program,  and  could
identify further actions over time. The actions currently contemplated under the Restructuring Program are expected to be substantially completed by the end of
2023, with the cumulative pretax costs to be incurred by the Company to implement the program now estimated to be approximately $3.0 billion. The Company
estimates that approximately  70% of the cumulative pretax costs will result in cash outlays, primarily related to employee separation expense and facility shut-
down  costs.  Approximately  30%  of  the  cumulative  pretax  costs  will  be  non-cash,  relating  primarily  to  the  accelerated  depreciation  of  facilities  to  be  closed  or
divested.  The  Company  expects  to  record  charges  of  approximately  $700  million  in  2021  related  to  the  Restructuring  Program.  Actions  under  previous  global
restructuring programs have been substantially completed.

The  Company  recorded  total  pretax  costs  of  $883  million  in  2020,  $927  million  in  2019  and  $658  million  in  2018  related  to  restructuring  program
activities.  Since inception  of the  Restructuring  Program  through  December  31, 2020, Merck  has  recorded  total  pretax  accumulated  costs  of approximately  $1.8
billion. For segment reporting, restructuring charges are unallocated expenses.

97

Table of Contents

The following table summarizes the charges related to restructuring program activities by type of cost:

Separation 
Costs

Accelerated 
Depreciation

Other

Total

Year Ended December 31, 2020
Cost of sales
Selling, general and administrative
Research and development
Restructuring costs

Year Ended December 31, 2019
Cost of sales
Selling, general and administrative
Research and development
Restructuring costs

Year Ended December 31, 2018
Cost of sales
Selling, general and administrative
Research and development
Restructuring costs

$

$

$

$

$

$

— 
— 
— 
385 
385 

— 
— 
— 
572 
572 

— 
— 
— 
473 
473 

$

$

$

$

$

$

143 
44 
81 
— 
268 

198 
33 
2 
— 
233 

10 
2 
(13)
— 
(1)

$

$

$

$

$

$

32 
3 
2 
193 
230 

53 
1 
2 
66 
122 

11 
1 
15 
159 
186 

$

$

$

$

$

$

175 
47 
83 
578 
883 

251 
34 
4 
638 
927 

21 
3 
2 
632 
658 

Separation costs are associated with actual headcount reductions, as well as those headcount reductions which were probable and could be reasonably

estimated.

Accelerated depreciation costs primarily relate to manufacturing, research and administrative facilities and equipment to be sold or closed as part of the
programs. Accelerated depreciation costs represent the difference between the depreciation expense to be recognized over the revised useful life of the asset, based
upon the anticipated date the site will be closed or divested or the equipment disposed of, and depreciation expense as determined utilizing the useful life prior to
the  restructuring  actions.  All  the  sites  have  and  will  continue  to  operate  up  through  the  respective  closure  dates  and,  since  future  undiscounted  cash  flows  are
sufficient to recover the respective book values, Merck is recording accelerated depreciation over the revised useful life of the site assets. Anticipated site closure
dates, particularly related to manufacturing locations, have been and may continue to be adjusted to reflect changes resulting from regulatory or other factors.

Other  activity  in  2020,  2019  and  2018  includes  asset  abandonment,  facility  shut-down  and  other  related  costs,  as  well  as  pretax  gains  and  losses
resulting  from  the  sales  of  facilities  and  related  assets.  Additionally,  other  activity  includes  certain  employee-related  costs  associated  with  pension  and  other
postretirement benefit plans (see Note 13) and share-based compensation.

The following table summarizes the charges and spending relating to restructuring program activities:

Restructuring reserves January 1, 2019
Expenses
(Payments) receipts, net
Non-cash activity
Restructuring reserves December 31, 2019
Expenses
(Payments) receipts, net
Non-cash activity
Restructuring reserves December 31, 2020 

(1)

Separation 
Costs

Accelerated 
Depreciation

Other

Total

$

$

443 
572 
(325)
— 
690 
385 
(508)
— 
567 

$

$

— 
233 
— 
(233)
— 
268 
— 
(268)
— 

$

$

91 
122 
(136)
(8)
69 
230 
(301)
38 
36 

$

$

534 
927 
(461)
(241)
759 
883 
(809)
(230)
603 

(1)    

The remaining cash outlays are expected to be substantially completed by the end of 2023.

98

 
 
 
 
 
 
 
 
 
 
 
Table of Contents

6.    Financial Instruments

Derivative Instruments and Hedging Activities

The Company manages the impact of foreign exchange rate movements and interest rate movements on its earnings, cash flows and fair values of assets

and liabilities through operational means and through the use of various financial instruments, including derivative instruments.

A significant portion of the Company’s revenues and earnings in foreign affiliates is exposed to changes in foreign exchange rates. The objectives and

accounting related to the Company’s foreign currency risk management program, as well as its interest rate risk management activities are discussed below.

Foreign Currency Risk Management

The Company has established revenue hedging, balance sheet risk management and net investment hedging programs to protect against volatility of

future foreign currency cash flows and changes in fair value caused by changes in foreign exchange rates.

The objective of the revenue hedging program is to reduce the variability caused by changes in foreign exchange rates that would affect the U.S. dollar
value of future cash flows derived from foreign currency denominated sales, primarily the euro, Japanese yen and Chinese renminbi. To achieve this objective, the
Company  will  hedge  a  portion  of  its  forecasted  foreign  currency  denominated  third-party  and  intercompany  distributor  entity  sales  (forecasted  sales)  that  are
expected to occur over its planning cycle, typically no more than two years into the future. The Company will layer in hedges over time, increasing the portion of
forecasted sales hedged as it gets closer to the expected date of the forecasted sales. The portion of forecasted sales hedged is based on assessments of cost-benefit
profiles  that  consider  natural  offsetting  exposures,  revenue  and  exchange  rate  volatilities  and  correlations,  and  the  cost  of  hedging  instruments.  The  Company
manages its anticipated transaction exposure principally with purchased local currency put options, forward contracts, and purchased collar options.

The  fair  values  of  these  derivative  contracts  are  recorded  as  either  assets  (gain  positions)  or  liabilities  (loss  positions)  in  the  Consolidated  Balance
Sheet.  Changes  in  the  fair  value  of  derivative  contracts  are  recorded  each  period  in  either  current  earnings  or  OCI,  depending  on  whether  the  derivative  is
designated as part of a hedge transaction and, if so, the type of hedge transaction. For derivatives that are designated as cash flow hedges, the unrealized gains or
losses on these contracts are recorded in AOCI and reclassified into Sales when the hedged anticipated revenue is recognized. For those derivatives which are not
designated as cash flow hedges, but serve as economic hedges of forecasted sales, unrealized gains or losses are recorded in Sales each period. The cash flows from
both designated and non-designated contracts are reported as operating activities in the Consolidated Statement of Cash Flows. The Company does not enter into
derivatives for trading or speculative purposes.

The Company manages operating activities  and net asset positions at each local subsidiary in order to mitigate  the effects of exchange on monetary
assets and liabilities. The Company also uses a balance sheet risk management program to mitigate the exposure of net monetary assets that are denominated in a
currency  other  than  a  subsidiary’s  functional  currency  from  the  effects  of  volatility  in  foreign  exchange.  In  these  instances,  Merck  principally  utilizes  forward
exchange  contracts  to  offset  the  effects  of  exchange  on  exposures  denominated  in  developed  country  currencies,  primarily  the  euro  and  Japanese  yen.  For
exposures  in  developing  country  currencies,  the  Company  will  enter  into  forward  contracts  to  partially  offset  the  effects  of  exchange  on  exposures  when  it  is
deemed economical to do so based on a cost-benefit analysis that considers the magnitude of the exposure, the volatility of the exchange rate and the cost of the
hedging instrument. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash Flows.

Monetary assets and liabilities denominated in a currency other than the functional currency of a given subsidiary are remeasured at spot rates in effect
on the balance sheet date with the effects of changes in spot rates reported in Other (income) expense, net. The forward contracts are not designated as hedges and
are marked to market through Other (income) expense, net. Accordingly, fair value changes in the forward contracts help mitigate the changes in the value of the
remeasured assets and liabilities attributable to changes in foreign currency exchange rates, except to the extent of the spot-forward differences. These differences
are not significant due to the short-term nature of the contracts, which typically have average maturities at inception of less than one year.

99

Table of Contents

The Company also uses forward exchange contracts to hedge a portion of its net investment in foreign operations against movements in exchange rates.
The  forward  contracts  are  designated  as  hedges  of  the  net  investment  in  a  foreign  operation.  The  unrealized  gains  or  losses  on  these  contracts  are  recorded  in
foreign currency translation adjustment within OCI, and remain in AOCI until either the sale or complete or substantially complete liquidation of the subsidiary.
The Company excludes certain portions of the change in fair value of its derivative instruments from the assessment of hedge effectiveness (excluded components).
Changes in fair value of the excluded components are recognized in OCI. The Company recognizes in earnings the initial value of the excluded components on a
straight-line basis over the life of the derivative instrument, rather than using the mark-to-market approach. The cash flows from these contracts are reported as
investing activities in the Consolidated Statement of Cash Flows.

Foreign exchange risk is also managed through the use of foreign currency debt. The Company’s senior unsecured euro-denominated notes have been
designated as, and are effective as, economic hedges of the net investment in a foreign operation. Accordingly, foreign currency transaction gains or losses due to
spot rate fluctuations on the euro-denominated debt instruments are included in foreign currency translation adjustment within OCI.

The effects of the Company’s net investment hedges on OCI and the Consolidated Statement of Income are shown below:

Years Ended December 31
Net Investment Hedging Relationships

Foreign exchange contracts
Euro-denominated notes

Amount of Pretax (Gain) Loss Recognized in Other
Comprehensive Income
2019

2020

2018

 (1)

Amount of Pretax (Gain) Loss Recognized in Other
(income) expense, net for Amounts Excluded from
Effectiveness Testing
2019

2018

2020

$

$

26 
385 

$

(10)
(75)

$

(18)
(183)

$

(19)
— 

$

(31)
— 

(11)
— 

(1)

 No amounts were reclassified from AOCI into income related to the sale of a subsidiary.

Interest Rate Risk Management

The Company may use interest rate swap contracts on certain investing and borrowing transactions to manage its net exposure to interest rate changes
and to reduce  its overall  cost  of borrowing.  The Company does not use leveraged  swaps and, in general,  does not leverage  any of its investment  activities  that
would put principal capital at risk.

In  February  2020,  five  interest  rate  swaps  with  notional  amounts  of  $250  million  each  matured.  These  swaps  effectively  converted  the
Company’s $1.25 billion, 1.85% fixed-rate notes due 2020 to variable rate debt. At December 31, 2020, the Company was a party to 14 pay-floating, receive-fixed
interest rate swap contracts designated as fair value hedges of fixed-rate notes in which the notional amounts match the amount of the hedged fixed-rate notes as
detailed in the table below:

Debt Instrument
3.875% notes due 2021 
2.40% notes due 2022
2.35% notes due 2022

(1)

(1)

 These interest rate swaps matured in January 2021.

Par Value of Debt

$

1,150 
1,000 
1,250 

2020
Number of Interest Rate
Swaps Held

Total Swap Notional
Amount

$

5 
4 
5 

1,150 
1,000 
1,250 

The interest rate swap contracts are designated hedges of the fair value changes in the notes attributable to changes in the benchmark LIBOR swap rate.
The fair value changes in the notes attributable to changes in the LIBOR swap rate are recorded in interest expense along with the offsetting fair value changes in
the swap contracts. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash Flows.

100

Table of Contents

The table below presents the location of amounts recorded on the Consolidated Balance Sheet related to cumulative basis adjustments for fair value

hedges as of December 31:

Balance Sheet Line Item in which Hedged Item is Included
Loans payable and current portion of long-term debt
Long-Term Debt

Carrying Amount of Hedged Liabilities

Cumulative Amount of Fair Value Hedging
Adjustment Increase (Decrease) Included in the
Carrying Amount

2020

2019

2020

2019

$

$

1,150 
2,301 

$

1,249 
3,409 

$

— 
53 

(1)
14 

Presented  in  the  table  below  is  the  fair  value  of  derivatives  on  a  gross  basis  segregated  between  those  derivatives  that  are  designated  as  hedging

instruments and those that are not designated as hedging instruments as of December 31:

Balance Sheet Caption

Asset

Liability

2020

Fair Value of 
Derivative

2019

Fair Value of 
Derivative

Asset

Liability

U.S. Dollar 
Notional

U.S. Dollar 
Notional

Derivatives Designated as Hedging

Instruments

Interest rate swap contracts
Interest rate swap contracts
Interest rate swap contracts
Foreign exchange contracts
Foreign exchange contracts
Foreign exchange contracts
Foreign exchange contracts

Other current assets
Other Assets
Accrued and other current liabilities
Other current assets
Other Assets
Accrued and other current liabilities
Other Noncurrent Liabilities

Derivatives Not Designated as Hedging

Instruments

Foreign exchange contracts
Foreign exchange contracts

Other current assets
Accrued and other current liabilities

$

$

$

$
$

1 
54 
— 
12 
45 
— 
— 
112 

70 
— 
70 
182 

$

$

$

$
$

— 
— 
— 
— 
— 
217 
1 
218 

— 
307 
307 
525 

$

$

$

$
$

1,150 
2,250 
— 
3,183 
2,030 
5,049 
52 
13,714 

7,260 
11,810 
19,070 
32,784 

$

$

$

$
$

— 
15 
— 
152 
55 
— 
— 
222 

66 
— 
66 
288 

$

$

$

$
$

— 
— 
1 
— 
— 
22 
1 
24 

— 
73 
73 
97 

$

$

$

$
$

— 
3,400 
1,250 
6,117 
2,160 
1,748 
53 
14,728 

7,245 
8,693 
15,938 
30,666 

As noted above, the Company records its derivatives on a gross basis in the Consolidated Balance Sheet. The Company has master netting agreements
with  several  of  its  financial  institution  counterparties  (see  Concentrations  of  Credit  Risk below).  The  following  table  provides  information  on  the  Company’s
derivative positions subject to these master netting arrangements as if they were presented on a net basis, allowing for the right of offset by counterparty and cash
collateral exchanged per the master agreements and related credit support annexes at December 31:

Gross amounts recognized in the consolidated balance sheet
Gross amounts subject to offset in master netting arrangements not offset in the consolidated balance sheet
Cash collateral posted/received
Net amounts

$

$

182  $
(156)
— 
26  $

525 
(156)
(36)
333 

$

$

288  $
(84)
(34)
170  $

97 
(84)
— 
13 

2020

2019

Asset

Liability

Asset

Liability

101

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

The table below provides information regarding the location and amount of pretax (gains) losses of derivatives designated in fair value or cash flow

hedging relationships:

Years Ended December 31
Financial Statement Line Items in which Effects of
Fair Value or Cash Flow Hedges are Recorded
(Gain) loss on fair value hedging relationships

Interest rate swap contracts

Hedged items
Derivatives designated as hedging instruments

Impact of cash flow hedging relationships

Foreign exchange contracts

Amount of (loss) gain recognized in OCI on

derivatives

(Decrease) increase in Sales as a result of AOCI

reclassifications

Interest rate contracts

Amount of gain recognized in Other (income) expense,

net on derivatives

Amount of loss recognized in OCI on derivatives

2020

Sales

2019

Other (income) expense, net 

(1)

Other comprehensive income (loss)

2018

2020

2019

2018

2020

2019

2018

$

47,994 

$

46,840 

$

42,294 

$

(886)

139 

(402)

$

(441)

$

(648)

$

(361)

— 
— 

— 

(6)

— 
— 

— 
— 

— 

255 

— 
— 

— 
— 

— 

(160)

— 
— 

40 
(76)

— 

— 

(4)
— 

95 
(65)

— 

— 

(4)
— 

(27)
50 

— 

— 

(4)
— 

— 
— 

(383)

6 

— 
(4)

— 
— 

87 

(255)

— 
(6)

— 
— 

228 

160 

— 
(4)

(1)

 Interest expense is a component of Other (income) expense, net.

The table below provides information regarding the income statement effects of derivatives not designated as hedging instruments:

Years Ended December 31
Derivatives Not Designated as Hedging Instruments

 (1)

Foreign exchange contracts
Foreign exchange contracts 
Interest rate contracts 
Forward contract related to Seagen common stock

(2)

(3)

Amount of Derivative Pretax (Gain) Loss Recognized in
Income
2019

2018

2020

Income Statement Caption

Other (income) expense, net
Sales
Other (income) expense, net
Research and development expenses

$

$

(12)
13 
9 
15 

$

174 
1 
— 
— 

(260)
(8)
— 
— 

(1) 

These derivative contracts mitigate changes in the value of remeasured foreign currency denominated monetary assets and liabilities attributable to changes in foreign currency exchange
rates.

(2)

 These derivative contracts serve as economic hedges of forecasted transactions.

(3)

 These derivatives serve as economic hedges against rising treasury rates.

At December  31, 2020, the Company estimates  $331 million of pretax net unrealized  losses on derivatives maturing  within the next 12 months that
hedge foreign currency denominated sales over that same period will be reclassified from AOCI to Sales. The amount ultimately reclassified to Sales may differ as
foreign exchange rates change. Realized gains and losses are ultimately determined by actual exchange rates at maturity.

102

Table of Contents

Investments in Debt and Equity Securities

Information on investments in debt and equity securities at December 31 is as follows:

Amortized 
Cost

2020

Gross Unrealized

Gains

Losses

Fair 
Value

Amortized 
Cost

2019

Gross Unrealized

Gains

Losses

$

U.S. government and agency securities
Foreign government bonds
Commercial paper
Corporate notes and bonds
Asset-backed securities
Total debt securities
Publicly traded equity securities 
Total debt and publicly traded equity securities

(1)

$

84 
5 
— 
— 
— 
89 

$

— 
— 
— 
— 
— 
— 

— 
— 
— 
— 
— 
— 

$

$

$

84 
5 
— 
— 
— 
89 
1,787 
1,876 

$

266 
— 
668 
608 
226 
1,768 

$

3 
— 
— 
13 
1 
17 

Fair 
Value

269 
— 
668 
621 
227 
1,785 
838 
2,623 

— 
— 
— 
— 
— 
— 

$

$

(1) 

Unrealized net gains recognized in Other (income) expense, net on equity securities still held at December 31, 2020 were $163 million during 2020. Unrealized net gains recognized in Other
(income) expense, net on equity securities still held at December 31, 2019 were $160 million during 2019.

At  December  31,  2020  and  2019,  the  Company  also  had  $586  million  and  $420  million,  respectively,  of  equity  investments  without  readily
determinable fair values included in Other Assets. During 2020 and 2019, the Company recognized unrealized gains of $62 million and $20 million, respectively,
in Other (income) expense, net, on certain of these equity investments based on favorable observable price changes from transactions involving similar investments
of the same investee. In addition, during 2020 and 2019, the Company recognized unrealized losses of $3 million and $13 million, respectively, in Other (income)
expense, net, related to certain of these investments based on unfavorable observable price changes. Cumulative unrealized gains and cumulative unrealized losses
based on observable prices changes for investments in equity investments without readily determinable fair values were $169 million and $24 million, respectively.

Fair Value Measurements

Fair  value  is  defined  as  the  exchange  price  that  would  be  received  for  an  asset  or  paid  to  transfer  a  liability  (an  exit  price)  in  the  principal  or  most
advantageous  market  for  the  asset  or  liability  in  an  orderly  transaction  between  market  participants  on  the  measurement  date.  The  Company  uses  a  fair  value
hierarchy which maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. There are three levels of inputs
used to measure fair value with Level 1 having the highest priority and Level 3 having the lowest:

Level 1 — Quoted prices (unadjusted) in active markets for identical assets or liabilities.

Level 2 — Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, or other inputs that are observable or can be

corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 — Unobservable inputs that are supported by little or no market activity. Level 3 assets or liabilities are those whose values are determined using
pricing  models,  discounted  cash  flow  methodologies,  or  similar  techniques  with  significant  unobservable  inputs,  as  well  as  assets  or  liabilities  for  which  the
determination of fair value requires significant judgment or estimation.

If the inputs used to measure the financial assets and liabilities fall within more than one level described above, the categorization is based on the lowest

level input that is significant to the fair value measurement of the instrument.

103

 
 
 
  
Table of Contents

Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

Financial assets and liabilities measured at fair value on a recurring basis at December 31 are summarized below:

Fair Value Measurements Using

Fair Value Measurements Using

Level 1

Level 2

Level 3

Total

Level 1

Level 2

Level 3

Total

2020

2019

Assets
Investments
Foreign government bonds
Commercial paper
Corporate notes and bonds
Asset-backed securities
U.S. government and agency securities
Publicly traded equity securities

(1)

Other assets 
U.S. government and agency securities
Publicly traded equity securities

(2)

Derivative assets 
Forward exchange contracts
Interest rate swaps
Purchased currency options

Total assets

Liabilities
Other liabilities
Contingent consideration
Derivative liabilities 
Forward exchange contracts
Written currency options
Interest rate swaps

(2)

Total liabilities

$

$

$

$

$

— 
— 
— 
— 
— 
780 

780 

84 
1,007 

1,091 

— 
— 
— 

— 

1,871 

$

$

5 
— 
— 
— 
— 
— 

5 

— 
— 

— 

90 
55 
37 

182 

187 

$

— 
— 
— 
— 
— 
— 

— 

— 
— 

— 

— 
— 
— 

— 

— 

$

$

5 
— 
— 
— 
— 
780 

785 

84 
1,007 

1,091 

90 
55 
37 

182 

$

— 
— 
— 
— 
— 
518 

518 

60 
320 

380 

— 
— 
— 

— 

$

— 
668 
621 
227 
209 
— 

1,725 

— 
— 

— 

169 
15 
104 

288 

$

2,058 

$

898 

$

2,013 

$

— 
— 
— 
— 
— 
— 

— 

— 
— 

— 

— 
— 
— 

— 

— 

$

— 
668 
621 
227 
209 
518 

2,243 

60 
320 

380 

169 
15 
104 

288 

$

2,911 

— 

$

— 

$

841 

$

841 

$

— 

$

— 

$

767 

$

— 
— 
— 

— 

— 

$

505 
20 
— 

525 

525 

— 
— 
— 

— 

505 
20 
— 

525 

$

841 

$

1,366 

$

— 
— 
— 

— 

— 

$

95 
1 
1 

97 

97 

— 
— 
— 

— 

$

767 

$

767 

95 
1 
1 

97 

864 

(1)    

Investments included in other assets are restricted as to use, including for the payment of benefits under employee benefit plans.

(2)       

The  fair  value  determination  of  derivatives  includes  the  impact  of  the  credit  risk  of  counterparties  to  the  derivatives  and  the  Company’s  own  credit  risk,  the  effects  of  which  were  not

significant.

As of December 31, 2020 and 2019, Cash and cash equivalents include $6.8 billion and $8.9 billion, respectively, of cash equivalents (which would be

considered Level 2 in the fair value hierarchy).

104

 
  
  
 
 
Table of Contents

Contingent Consideration

Summarized information about the changes in liabilities for contingent consideration associated with business acquisitions is as follows:

Fair value January 1
Additions
Changes in estimated fair value 
Payments
Fair value December 31

 (2)(3)

(1)

2020

2019

$

$

767  $
97 
83 
(106)
841  $

788 
— 
64 
(85)
767 

(1) 

Recorded in Cost of sales, Research and development expenses, and Other (income) expense, net. Includes cumulative translation adjustments.

(2)

 Balance at December 31, 2020 includes $148 million recorded as a current liability for amounts expected to be paid within the next 12 months.

(3)

 At  December  31,  2020  and  2019,  $711  million  and  $625  million,  respectively,  of  the  liabilities  relate  to  the  termination  of  the  Sanofi  Pasteur  MSD  joint  venture  in  2016.  As  part  of  the
termination, Merck recorded a liability for contingent future royalty payments of 11.5% on net sales of all Merck products that were previously sold by the joint venture through December
31, 2024. The fair value of this liability is determined utilizing the estimated amount and timing of projected cash flows and a risk-adjusted discount rate of 8% to present value the cash
flows.

The additions to contingent consideration in 2020 relate to the acquisition of Themis. The changes in the estimated fair value of liabilities for contingent
consideration  in  2020  and  2019  were  largely  attributable  to  increases  in  the  liabilities  recorded  in  connection  with  the  termination  of  the  Sanofi  Pasteur  MSD
(SPMSD) joint venture in 2016. In 2020, the increase was partially offset by a decline related to the discontinuation of a COVID-19 vaccine program obtained
through the acquisition of Themis. The payments of contingent consideration in both years relate to the SPMSD liabilities described above.

Other Fair Value Measurements

Some of the Company’s financial instruments, such as cash and cash equivalents, receivables and payables, are reflected in the balance sheet at carrying

value, which approximates fair value due to their short-term nature.

The  estimated  fair  value  of  loans  payable  and  long-term  debt  (including  current  portion)  at  December  31,  2020,  was  $36.0  billion  compared  with  a
carrying value of $31.8 billion and at December 31, 2019, was $28.8 billion compared with a carrying value of $26.3 billion. Fair value was estimated using recent
observable market prices and would be considered Level 2 in the fair value hierarchy.

Concentrations of Credit Risk

On an ongoing basis, the Company monitors concentrations of credit risk associated with corporate and government issuers of securities and financial
institutions  with  which  it  conducts  business.  Credit  exposure  limits  are  established  to  limit  a  concentration  with  any  single  issuer  or  institution.  Cash  and
investments are placed in instruments that meet high credit quality standards, as specified in the Company’s investment policy guidelines.

The majority of the Company’s accounts receivable arise from product sales in the United States, Europe and China and are primarily due from drug
wholesalers and retailers,  hospitals, government  agencies, managed health care providers and pharmacy benefit managers.  The Company monitors the financial
performance  and  creditworthiness  of its  customers  so that  it can  properly  assess and respond  to changes  in  their  credit  profile.  The Company also  continues  to
monitor global economic conditions, including the volatility associated with international sovereign economies, and associated impacts on the financial markets
and its business. 

The  Company’s  customers  with  the  largest  accounts  receivable  balances  are:  McKesson  Corporation,  AmerisourceBergen  Corporation  and  Cardinal
Health, Inc., which represented, in aggregate, approximately 45% of total accounts receivable at December 31, 2020. The Company monitors the creditworthiness
of its customers to which it grants credit terms in the normal course of business. Bad debts have been minimal. The Company does not normally require collateral
or other security to support credit sales.

The Company has accounts receivable factoring agreements with financial institutions in certain countries to sell accounts receivable. The Company
factored  $2.3  billion  and  $2.7  billion  of  accounts  receivable  in  the  fourth  quarter  of  2020  and  2019,  respectively,  under  these  factoring  arrangements,  which
reduced outstanding accounts receivable. The cash received from the financial institutions is reported within operating activities in the

105

Table of Contents

Consolidated Statement of Cash Flows. In certain of these factoring arrangements, for ease of administration, the Company will collect customer payments related
to  the  factored  receivables,  which  it  then  remits  to  the  financial  institutions.  At  December  31,  2020  and  2019,  the  Company  had  collected  $102  million  and
$256 million, respectively, on behalf of the financial institutions, which is reflected as restricted cash in Other current assets and the related obligation to remit the
cash within Accrued and other current liabilities. The Company remitted the cash to the financial institutions in January 2021 and 2020, respectively. The net cash
flows relating to these collections are reported as financing activities in the Consolidated Statement of Cash Flows. The cost of factoring such accounts receivable
was de minimis.

Derivative financial instruments are executed under International Swaps and Derivatives Association master agreements. The master agreements with
several  of  the  Company’s  financial  institution  counterparties  also  include  credit  support  annexes.  These  annexes  contain  provisions  that  require  collateral  to  be
exchanged depending on the value of the derivative assets and liabilities,  the Company’s credit rating, and the credit rating of the counterparty. Cash collateral
advanced by the Company to counterparties was $36 million at December 31, 2020. Cash collateral received by the Company from various counterparties was $34
million at December 31, 2019. The obligation to return such collateral is recorded in Accrued and other current liabilities.

7.    Inventories

Inventories at December 31 consisted of:

Finished goods
Raw materials and work in process
Supplies
Total (approximates current cost)
Decrease to LIFO cost

Recognized as:
Inventories
Other assets

$

$

$

2020

2019

1,963  $
6,420 
206 
8,589 
(82)
8,507  $

6,310  $
2,197 

1,772 
5,650 
207 
7,629 
(171)
7,458 

5,978 
1,480 

Inventories  valued  under  the  LIFO  method  comprised  approximately  $2.9  billion  and  $2.6  billion  at  December  31,  2020  and  2019,  respectively.
Amounts  recognized  as  Other assets are  comprised  almost  entirely  of  raw  materials  and  work  in  process  inventories.  At  December  31,  2020  and  2019,  these
amounts  included  $1.9  billion  and  $1.3  billion,  respectively,  of  inventories  not  expected  to  be  sold  within  one  year.  In  addition,  these  amounts  included  $279
million and $168 million at December 31, 2020 and 2019, respectively, of inventories produced in preparation for product launches.

8.    Goodwill and Other Intangibles

The following table summarizes goodwill activity by segment:

Balance January 1, 2019
Acquisitions
Impairments
(1)
Other 
Balance December 31, 2019 
Acquisitions
Divestitures
Other 
Balance December 31, 2020 

(1)

(2)

(2)

Pharmaceutical

Animal Health

All Other

Total

$

$

16,162 
19 
— 
— 
16,181 
742 
— 
47 
16,970 

$

$

1,870  $
1,322 
— 
— 
3,192 
105 
— 
(29)
3,268  $

221  $
— 
(162)
(7)
52 
— 
(54)
2 
—  $

18,253 
1,341 
(162)
(7)
19,425 
847 
(54)
20 
20,238 

(1) 

Other includes cumulative translation adjustments on goodwill balances and certain other adjustments.

(2)

 Accumulated goodwill impairment losses were $531 million at both December 31, 2020 and 2019.

106

 
 
Table of Contents

The additions to goodwill in the Pharmaceutical segment in 2020 were primarily related to the acquisitions of ArQule and Themis (see Note 3). The
additions to goodwill within the Animal Health segment in 2019 primarily relate to the acquisition of Antelliq (see Note 3). The impairments of goodwill within
other non-reportable segments in 2019 relate to certain businesses within the Healthcare Services segment. The Healthcare Services segment was fully divested in
the first quarter of 2020.

Other intangibles at December 31 consisted of:

Products and product rights
Licenses
IPR&D
Trade names
Other

Gross 
Carrying 
Amount

$

$

45,087 
4,177 
3,228 
2,882 
2,223 
57,597 

$

$

2020

Accumulated 
Amortization

Net

Gross 
Carrying 
Amount

2019

Accumulated 
Amortization

39,925 
1,387 
— 
352 
1,329 
42,993 

$

$

5,162  $
2,790 
3,228 
2,530 
894 
14,604  $

45,947  $
3,185 
1,032 
2,899 
2,261 
55,324  $

38,852 
824 
— 
217 
1,235 
41,128 

$

$

Net

7,095 
2,361 
1,032 
2,682 
1,026 
14,196 

Acquired  intangibles  include  products  and  product  rights,  licenses,  trade  names  and  patents,  which  are  initially  recorded  at  fair  value,  assigned  an
estimated  useful  life,  and  amortized  primarily  on  a  straight-line  basis  over  their  estimated  useful  lives.  Some  of  the  Company’s  more  significant  acquired
intangibles, on a net basis, related to human health marketed products (included in products and product rights above) at December 31, 2020 include Zerbaxa, $551
million; Implanon/Nexplanon, $354 million; Gardasil/Gardasil 9, $276 million; Dificid, $228 million; Bridion, $185 million; Sivextro, $154 million; and Simponi,
$132 million. Additionally, the Company had $5.4 billion of net acquired intangibles related to animal health marketed products at December 31, 2020, of which
$2.5 billion relate primarily to trade names obtained through the 2019 acquisition of Antelliq (see Note 3). Some of the Company’s more significant net intangible
assets included in licenses above at December 31, 2020 include Lynparza, $1.3 billion and Lenvima, $1.1 billion as a result of collaborations with AstraZeneca and
Eisai (see Note 4). At December 31, 2020, IPR&D primarily relates to MK-1026 obtained through the acquisition of ArQule in 2020 (see Note 3) and MK-7264
(gefapixant) obtained through the acquisition of Afferent Pharmaceuticals in 2016. The Company has an intangible asset related to a collaboration with Bayer (see
Note 4) that had a carrying value of $849 million at December 31, 2020 reflected in “Other” in the table above.

In 2020, the Company recorded an impairment charge of $1.6 billion within Cost of sales related to Zerbaxa for injection, a combination antibacterial
and  beta-lactamase  inhibitor  for  the  treatment  of  certain  bacterial  infections.  In  December  2020,  the  Company  temporarily  suspended  sales  of  Zerbaxa,  and
subsequently issued a product recall, following the identification of product sterility issues. The recall constituted a triggering event requiring the evaluation of the
Zerbaxa intangible  asset  for  impairment.  The  Company  revised  its  cash  flow  forecasts  for  Zerbaxa utilizing  certain  assumptions  around  the  return  to  market
timeline and anticipated uptake in sales thereafter. These revised cash flow forecasts indicated that the Zerbaxa intangible asset value was not fully recoverable on
an  undiscounted  cash  flows  basis.  The  Company  utilized  market  participant  assumptions  to  determine  its  best  estimate  of  the  fair  value  of  the  intangible  asset
related to Zerbaxa that, when compared with its related carrying value, resulted in the impairment charge noted above. The Company also wrote-off inventory of
$120 million to Cost of sales in 2020 related to the  Zerbaxa recall. The remaining intangible asset balance related to  Zerbaxa was $551 million at December 31,
2020.

In 2019, the Company recorded impairment charges related to marketed products and other intangibles of $705 million. Of this amount, $612 million
related to Sivextro, a product for the treatment of acute bacterial skin and skin structure infections caused by designated susceptible Gram-positive organisms. As
part of a reorganization and reprioritization of its internal sales force, the Company made the decision to cease promotion of Sivextro in the U.S. market by the end
of 2019. This decision resulted in reduced cash flow projections for Sivextro, which indicated that the Sivextro intangible asset value was not fully recoverable on
an  undiscounted  cash  flows  basis.  The  Company  utilized  market  participant  assumptions  to  determine  its  best  estimate  of  the  fair  value  of  the  intangible  asset
related to Sivextro that, when compared with its related carrying value, resulted in the impairment charge noted above.

107

 
  
 
Table of Contents

IPR&D that the Company acquires through business combinations represents the fair value assigned to incomplete research projects which, at the time
of  acquisition,  have  not  reached  technological  feasibility.  Amounts  capitalized  as  IPR&D  are  accounted  for  as  indefinite-lived  intangible  assets,  subject  to
impairment testing until completion or abandonment of the projects. Upon successful completion of each project, the Company will make a separate determination
as to the then useful life of the asset and begin amortization.

In  2020,  the  Company  recorded  a  $90  million  IPR&D  impairment  charge  within  Research  and  development expenses  related  to  a  decision  to
discontinue the development program for COVID-19 vaccine candidate V591 following Merck’s review of findings from a Phase 1 clinical study for the vaccine.
In  the  study,  V591  was  generally  well  tolerated,  but  the  immune  responses  were  inferior  to  those  seen  following  natural  infection  and  those  reported  for  other
SARS-CoV-2/COVID-19 vaccines. The discontinuation of this development program also resulted in a reversal of the related liability for contingent consideration
of $45 million (see Note 6).

In 2019, the Company recorded $172 million of IPR&D impairment charges. Of this amount, $155 million relates to the write-off of the intangible asset
balance for programs obtained in connection with the acquisition of IOmet Pharma Ltd following a review of clinical trial results conducted by Merck, along with
external clinical trial results for similar compounds. The discontinuation of this clinical development program also resulted in a reversal of the related liability for
contingent consideration of $11 million.

In 2018, the Company recorded  $152 million  of IPR&D impairment  charges.  Of this amount,  $139 million  relates  to the write-off  of the  remaining
intangible  asset  balance  for  a  program  obtained  in  connection  with  the  SmartCells  acquisition  following  a  decision  to  terminate  the  program  due  to  product
development issues. The discontinuation of this clinical development program also resulted in a reversal of the related liability for contingent consideration of $60
million.

The  IPR&D  projects  that  remain  in  development  are  subject  to  the  inherent  risks  and  uncertainties  in  drug  development  and  it  is  possible  that  the

Company will not be able to successfully develop and complete the IPR&D programs and profitably commercialize the underlying product candidates.

The Company may recognize additional non-cash impairment charges in the future related to other marketed products or pipeline programs and such

charges could be material.

Aggregate amortization expense primarily recorded within Cost of sales was $1.9 billion in 2020, $2.0 billion in 2019 and $3.1 billion in 2018. The
estimated aggregate amortization expense for each of the next five years is as follows: 2021, $1.5 billion; 2022, $1.5 billion; 2023, $1.4 billion; 2024, $1.3 billion;
2025, $1.2 billion.

9.    Loans Payable, Long-Term Debt and Leases

Loans Payable

Loans payable at December 31, 2020 included $2.3 billion of notes due in 2021, $4.0 billion of commercial paper and $73 million of long-dated notes
that  are  subject  to  repayment  at  the  option  of  the  holders.  Loans  payable  at  December  31,  2019  included  $1.9  billion  of  notes  due  in  2020,  $1.4  billion  of
commercial paper and $226 million of long-dated notes that are subject to repayment at the option of the holders. The weighted-average interest rate of commercial
paper borrowings was 0.79% and 2.23% for the years ended December 31, 2020 and 2019, respectively.

108

Table of Contents

Long-Term Debt

Long-term debt at December 31 consisted of:

2.75% notes due 2025
3.70% notes due 2045
2.80% notes due 2023
3.40% notes due 2029
4.00% notes due 2049
2.35% notes due 2022
4.15% notes due 2043
1.45% notes due 2030
1.875% euro-denominated notes due 2026
2.45% notes due 2050
2.40% notes due 2022
0.75% notes due 2026
3.90% notes due 2039
2.35% notes due 2040
2.90% notes due 2024
6.50% notes due 2033
0.50% euro-denominated notes due 2024
1.375% euro-denominated notes due 2036
2.50% euro-denominated notes due 2034
3.60% notes due 2042
6.55% notes due 2037
5.75% notes due 2036
5.95% debentures due 2028
5.85% notes due 2039
6.40% debentures due 2028
6.30% debentures due 2026
3.875% notes due 2021
1.125% euro-denominated notes due 2021
Other

2020

2019

2,493  $
1,976 
1,748 
1,734 
1,469 
1,269 
1,238 
1,233 
1,218 
1,211 
1,032 
991 
983 
982 
746 
719 
611 
606 
605 
491 
411 
338 
306 
271 
250 
135 
— 
— 
294 
25,360  $

2,492 
1,975 
1,747 
1,732 
1,468 
1,248 
1,238 
— 
1,107 
— 
1,010 
— 
982 
— 
745 
722 
555 
551 
550 
490 
412 
338 
306 
271 
250 
135 
1,151 
1,113 
148 
22,736 

$

$

Other (as presented in the table above) includes $294 million and $147 million at December 31, 2020 and 2019, respectively, of borrowings at variable

rates that resulted in effective interest rates of 0.45% and 2.54% for 2020 and 2019, respectively.

With the exception of the 6.30% debentures due 2026, the notes listed in the table above are redeemable in whole or in part, at Merck’s option at any

time, at varying redemption prices.

In  June  2020,  the  Company  issued  $4.5  billion  principal  amount  of  senior  unsecured  notes  consisting  of  $1.0  billion  of  0.75%  notes  due  2026,
$1.25 billion of 1.45% notes due 2030, $1.0 billion of 2.35% notes due 2040 and $1.25 billion of 2.45% notes due 2050. Merck used the net proceeds from the
offering  for  general  corporate  purposes,  including  without  limitation  the  repayment  of  outstanding  commercial  paper  borrowings  and  other  indebtedness  with
upcoming maturities.

Effective as of November 3, 2009, the Company executed a full and unconditional guarantee of the then existing debt of its subsidiary Merck Sharp &
Dohme Corp. (MSD) and MSD executed a full and unconditional guarantee of the then existing debt of the Company (excluding commercial paper), including for
payments of principal and interest. These guarantees do not extend to debt issued subsequent to that date.

Certain of the Company’s borrowings require  that Merck comply with covenants and, at December  31, 2020, the Company was in compliance  with

these covenants.

109

 
Table of Contents

The aggregate maturities of long-term debt for each of the next five years are as follows: 2021, $2.3 billion; 2022, $2.3 billion; 2023, $1.7 billion; 2024,

$1.4 billion; 2025, $2.5 billion.

The Company has a $6.0 billion credit facility that matures in June 2024. The facility provides backup liquidity for the Company’s commercial paper

borrowing facility and is to be used for general corporate purposes. The Company has not drawn funding from this facility.

Leases

The  Company  has  operating  leases  primarily  for  manufacturing  facilities,  research  and  development  facilities,  corporate  offices,  employee  housing,
vehicles and certain equipment. The Company determines if an arrangement is a lease at inception. When evaluating contracts for embedded leases, the Company
exercises  judgment  to  determine  if  there  is  an  explicit  or  implicit  identified  asset  in  the  contract  and  if  Merck  controls  the  use  of  that  asset.  Embedded  leases,
primarily  associated  with  contract  manufacturing  organizations,  are  immaterial.  The  lease  term  includes  options  to  extend  or  terminate  the  lease  when  it  is
reasonably certain that Merck will exercise that option. Real estate leases for facilities have an average remaining lease term of eight years, which include options
to extend the leases for up to four years where applicable. Vehicle leases are generally in effect for four years. The Company does not record short-term leases
(leases with an initial term of 12 months or less) on the balance sheet; however, Merck currently has no short-term leases.

Lease expense for operating lease payments is recognized on a straight-line basis over the term of the lease. Operating lease assets and liabilities are
recognized based on the present value of lease payments over the lease term. Since the Company’s leases do not have a readily determinable implicit discount rate,
the  Company  uses  its  incremental  borrowing  rate  to  calculate  the  present  value  of  lease  payments  by  asset  class.  On  a  quarterly  basis,  an  updated  incremental
borrowing rate is determined based on the average remaining lease term of each asset class and the Company’s pretax cost of debt for that same term. The updated
rates for each asset class are applied prospectively to new leases. The Company does not separate lease components (e.g. payments for rent, real estate taxes and
insurance costs) from non-lease components (e.g. common-area maintenance costs) in the event that the agreement contains both. Merck includes both the lease
and non-lease components for purposes of calculating the right-of-use asset and related lease liability (if the non-lease components are fixed). For vehicle leases
and employee housing, the Company applies a portfolio approach to effectively account for the operating lease assets and liabilities.

Certain of the Company’s lease agreements contain variable lease payments that are adjusted periodically for inflation or for actual operating expense
true-ups compared with estimated amounts; however, these amounts are immaterial.  Sublease income and activity related to sale and leaseback transactions are
immaterial. Merck’s lease agreements do not contain any material residual value guarantees or material restrictive covenants.

Operating  lease  cost  was  $346  million  in  2020  and  $339  million  in  2019.  Rental  expense  under  operating  leases,  net  of  sublease  income,  was
$322  million  in  2018.  Cash  paid  for  amounts  included  in  the  measurement  of  operating  lease  liabilities  was  $340  million  in  2020  and  $281  million  in  2019.
Operating lease assets obtained in exchange for lease obligations was $495 million in 2020 and $129 million in 2019.

Supplemental balance sheet information related to operating leases is as follows:

December 31
Assets

Other Assets 

(1)

Liabilities

Accrued and other current liabilities
Other Noncurrent Liabilities

Weighted-average remaining lease term (years)
Weighted-average discount rate

(1)

 Includes prepaid leases that have no related lease liability.

2020

2019

$

$

1,725 

$

300 
1,362 
1,662 

8.0
2.8 %

$

1,073 

236 
768 
1,004 

7.4
3.2 %

110

Table of Contents

Maturities of operating leases liabilities are as follows:

2021
2022
2023
2024
2025
Thereafter
Total lease payments
Less: Imputed interest

$

$

336 
277 
252 
187 
162 
665 
1,879 
217 
1,662 

At December 31, 2020, the Company had entered into additional real estate operating leases that had not yet commenced; the obligations associated

with these leases total $475 million.

10.    Contingencies and Environmental Liabilities

The Company is involved in various claims and legal proceedings of a nature considered normal to its business, including product liability, intellectual
property, and commercial litigation, as well as certain additional matters including governmental and environmental matters. In the opinion of the Company, it is
unlikely that the resolution of these matters will be material to the Company’s financial condition, results of operations or cash flows.

Given  the  nature  of  the  litigation  discussed  below  and  the  complexities  involved  in  these  matters,  the  Company  is  unable  to  reasonably  estimate  a
possible  loss  or  range  of  possible  loss  for  such  matters  until  the  Company  knows, among  other  factors,  (i)  what  claims,  if  any,  will  survive  dispositive  motion
practice,  (ii)  the  extent  of  the  claims,  including  the  size  of  any  potential  class,  particularly  when  damages  are  not  specified  or  are  indeterminate,  (iii)  how  the
discovery process will affect the litigation, (iv) the settlement posture of the other parties to the litigation and (v) any other factors that may have a material effect
on the litigation.

The  Company  records  accruals  for  contingencies  when it  is  probable  that  a  liability  has  been  incurred  and  the  amount  can  be  reasonably  estimated.
These accruals are adjusted periodically as assessments change or additional information becomes available. For product liability claims, a portion of the overall
accrual is actuarially determined and considers such factors as past experience, number of claims reported and estimates of claims incurred but not yet reported.
Individually significant contingent losses are accrued when probable and reasonably estimable. Legal defense costs expected to be incurred in connection with a
loss contingency are accrued when probable and reasonably estimable.

The  Company’s  decision  to  obtain  insurance  coverage  is  dependent  on  market  conditions,  including  cost  and  availability,  existing  at  the  time  such
decisions are made. The Company has evaluated its risks and has determined that the cost of obtaining product liability insurance outweighs the likely benefits of
the coverage that is available and, as such, has no insurance for most product liabilities.

Product Liability Litigation

Fosamax

As  previously  disclosed,  Merck  is  a  defendant  in  product  liability  lawsuits  in  the  United  States  involving  Fosamax  (Fosamax Litigation).  As  of
December 31, 2020, approximately 3,520 cases are pending against Merck in either federal or state court. Plaintiffs in the vast majority of these cases generally
allege that they sustained femur fractures and/or other bone injuries (Femur Fractures) in association with the use of Fosamax.

All  federal  cases  involving  allegations  of Femur  Fractures  have  been or  will  be  transferred  to  a  multidistrict  litigation  in  the  District  of New Jersey
(Femur Fracture  MDL). In the only bellwether  case tried to date in the Femur Fracture  MDL, Glynn v. Merck, the jury returned a verdict in Merck’s favor. In
addition,  in  June  2013,  the  Femur  Fracture  MDL court  granted  Merck’s  motion  for  judgment  as  a  matter  of  law  in  the  Glynn case  and  held  that  the  plaintiff’s
failure to warn claim was preempted by federal law.

111

Table of Contents

In  August  2013,  the  Femur  Fracture  MDL  court  entered  an  order  requiring  plaintiffs  in  the  Femur  Fracture  MDL  to  show  cause  why  those  cases
asserting claims for a femur fracture injury that took place prior to September 14, 2010, should not be dismissed based on the court’s preemption decision in the
Glynn case. Pursuant to the show cause order, in March 2014, the Femur Fracture MDL court dismissed with prejudice approximately 650 cases on preemption
grounds. Plaintiffs in approximately 515 of those cases appealed that decision to the U.S. Court of Appeals for the Third Circuit (Third Circuit). In March 2017, the
Third Circuit issued a decision reversing the Femur Fracture MDL court’s preemption ruling and remanding the appealed cases back to the Femur Fracture MDL
court. In May 2019, the U.S. Supreme Court decided that the Third Circuit had incorrectly concluded that the issue of preemption should be resolved by a jury, and
accordingly vacated the judgment of the Third Circuit and remanded the proceedings back to the Third Circuit to address the issue in a manner consistent with the
Supreme Court’s opinion. In November 2019, the Third Circuit remanded the cases back to the District Court in order to allow that court to determine in the first
instance whether the plaintiffs’ state law claims are preempted by federal law under the standards described by the Supreme Court in its opinion. Briefing on the
issue is closed, and the parties await the decision of the District Court.

Accordingly, as of December 31, 2020, approximately 970 cases were actively pending in the Femur Fracture MDL.

As of December 31, 2020, approximately 2,270 cases alleging Femur Fractures have been filed in New Jersey state court and are pending before Judge
James  Hyland  in  Middlesex  County.  The  parties  selected  an  initial  group  of  cases  to  be  reviewed  through  fact  discovery,  and  Merck  has  continued  to  select
additional cases to be reviewed.

As of December 31, 2020, approximately 275 cases alleging Femur Fractures have been filed and are pending in California state court. All of the Femur

Fracture cases filed in California state court have been coordinated before a single judge in Orange County, California.

Additionally, there are four Femur Fracture cases pending in other state courts.

Discovery is presently stayed in the Femur Fracture MDL and in the state court in California. Merck intends to defend against these lawsuits.

Januvia/Janumet

As previously disclosed, Merck is a defendant in product liability lawsuits in the United States involving Januvia and/or Janumet. As of December 31,

2020, Merck is aware of approximately 1,480 product users alleging that Januvia and/or Janumet caused the development of pancreatic cancer and other injuries.

Most claims have been filed in multidistrict litigation before the U.S. District Court for the Southern District of California (MDL). Outside of the MDL,

the majority of claims have been filed in coordinated proceedings before the Superior Court of California, County of Los Angeles (California State Court).

In  November  2015,  the  MDL  and  California  State  Court,  in  separate  opinions,  granted  summary  judgment  to  defendants  on  grounds  of  federal

preemption.

Plaintiffs appealed in both forums. In November 2017, the U.S. Court of Appeals for the Ninth Circuit vacated the judgment and remanded for further
discovery.  In  November  2018,  the  California  state  appellate  court  reversed  and  remanded  on  similar  grounds.  In  March  2019,  the  parties  in  the  MDL  and  the
California  coordinated  proceedings  agreed  to  coordinate  and  adopt  a  schedule  for  completing  discovery  on  general  causation  and  preemption  issues  and  for
renewing summary judgment and expert motions. Briefing of those motions is complete and hearings before both the MDL and California State Court judges took
place on October 20 and December 8, 2020, respectively.

As of December 31, 2020, six product users have claims pending against Merck in state courts other than California, including Illinois. In June 2017,
the  Illinois  trial  court  denied  Merck’s  motion  for  summary  judgment  based  on  federal  preemption.  Merck  appealed,  and  the  Illinois  appellate  court  affirmed  in
December  2018.  Merck  filed  a  petition  for  leave  to  appeal  to  the  Illinois  Supreme  Court  in  February  2019.  In  April  2019,  the  Illinois  Supreme  Court  stayed
consideration  of  the  pending  petition  to  appeal  until  the  U.S.  Supreme  Court  issued  its  opinion  in  Merck  Sharp  &  Dohme  Corp.  v.  Albrecht  (relating  to  the
Fosamax matter discussed above). Merck filed

112

Table of Contents

the  opinion  in  Albrecht with  the  Illinois  Supreme  Court  in  June  2019.  The  petition  for  leave  to  appeal  was  decided  in  September  2019,  in  which  the  Illinois
Supreme  Court  directed  the  intermediate  appellate  court  to  reconsider  its  earlier  ruling.  The  Illinois  Appellate  Court  issued  a  favorable  decision  concluding,
consistent with Albrecht, that preemption presents a legal question to be resolved by the court. In May 2020, the Illinois Appellate Court issued a mandate to the
state trial court, which, as of December 31, 2020, had not scheduled a case management conference.

In addition to the claims noted above, the Company has agreed to toll the statute of limitations for approximately 50 additional claims. The Company

intends to continue defending against these lawsuits.

Vioxx

Merck  reached  a  settlement  with  the  Attorney  General  of  Utah  to  fully  resolve  the  state’s  previously  disclosed  civil  lawsuit  alleging  that  Merck
misrepresented the safety of Vioxx. As part of the resolution, Merck paid the state $25 million. The settlement does not constitute an admission by Merck of any
liability or wrongdoing. This agreement marks the final resolution of litigation involving Vioxx in the United States. There is ongoing  Vioxx litigation in certain
countries outside the United States.

Governmental Proceedings

As previously disclosed, in the fall of 2018, the Company received a records subpoena from the U.S. Attorney’s Office for the District of Vermont (VT
USAO) pursuant to Section 248 of the Health Insurance Portability and Accountability Act of 1996 (HIPAA) relating to an investigation of potential health care
offenses. The subpoena sought information relating to any actual or potential business relationship or arrangement Merck has had with Practice Fusion, Inc. (PFI),
a  cloud-based,  electronic  health  records  (EHR)  company  that  was  acquired  by  Allscripts  in  January  2018.  The  Company  cooperated  with  the  government  and
responded  to  that  subpoena.  Subsequently,  in  May  2019,  Merck  received  a  second  records  subpoena  from  the  VT  USAO  that  broadened  the  government’s
information request by seeking information relating to Merck’s relationship with any EHR company. Shortly thereafter, the VT USAO served a Civil Investigation
Demand (CID) upon Merck similarly seeking information on the Company’s relationships with EHR vendors. The CID explains that the government is conducting
a False Claims Act investigation concerning whether Merck and/or PFI submitted claims to federal health care programs that violate the Federal Anti-Kickback
Statute. Merck is cooperating with the government’s investigation.

As previously disclosed, in April 2019, Merck received a set of investigative interrogatories from the California Attorney General’s Office pursuant to
its investigation of conduct and agreements  that allegedly  affected  or delayed  competition  to Lantus in the insulin market. The interrogatories  seek information
concerning Merck’s development of an insulin glargine product, and its subsequent termination, as well as Merck’s patent litigation against Sanofi S.A. concerning
Lantus and the resolution of that litigation. Merck is cooperating with the California Attorney General’s investigation.

As previously disclosed, in June 2020, Merck received a CID from the U.S. Department of Justice. The CID requests answers to interrogatories, as well
as  various  documents,  regarding  temperature  excursions  at  a  third-party  storage  facility  containing  certain  Merck  products.  Merck  is  cooperating  with  the
government’s investigation and intends to produce information and/or documents as necessary in response to the CID.

As  previously  disclosed,  the  Company’s  subsidiaries  in  China  have  received  and  may  continue  to  receive  inquiries  regarding  their  operations  from
various  Chinese  governmental  agencies.  Some  of  these  inquiries  may  be  related  to  matters  involving  other  multinational  pharmaceutical  companies,  as  well  as
Chinese entities doing business with such companies. The Company’s policy is to cooperate with these authorities and to provide responses as appropriate.

As previously disclosed, from time to time, the Company receives inquiries and is the subject of preliminary investigation activities from competition
and other governmental authorities in markets outside the United States. These authorities may include regulators, administrative authorities, and law enforcement
and other similar officials, and these preliminary investigation activities may include site visits, formal or informal requests or demands for documents or materials,
inquiries or interviews and similar matters. Certain of these preliminary inquiries or activities may lead to the commencement of formal proceedings. Should those
proceedings be determined adversely to the Company, monetary fines and/or remedial undertakings may be required.

113

Table of Contents

Commercial and Other Litigation

Zetia Antitrust Litigation

As previously disclosed, Merck, MSD, Schering Corporation and MSP Singapore Company LLC (collectively, the Merck Defendants) are defendants
in putative class action and opt-out lawsuits filed in 2018 on behalf of direct and indirect purchasers of Zetia alleging violations of federal and state antitrust laws,
as well as other state statutory and common law causes of action. The cases have been consolidated for pretrial purposes in a federal multidistrict litigation before
Judge Rebecca Beach Smith in the Eastern District of Virginia. In December 2018, the court denied the Merck Defendants’ motions to dismiss or stay the direct
purchaser putative class actions pending bilateral arbitration. In August 2019, the district court adopted in full the report and recommendation of the magistrate
judge with respect to the Merck Defendants’ motions to dismiss on non-arbitration issues, thereby granting in part and denying in part Merck Defendants’ motions
to dismiss. In addition, in June 2019, the representatives of the putative direct purchaser class filed an amended complaint and, in August 2019, retailer opt-out
plaintiffs  filed  an  amended  complaint.  In  December  2019,  the  district  court  granted  the  Merck  Defendants’  motion  to  dismiss  to  the  extent  the  motion  sought
dismissal of claims for overcharges paid by entities that purchased generic ezetimibe from Par Pharmaceutical, Inc. (Par Pharmaceutical) and dismissed any claims
for such overcharges. In November 2019, the direct purchaser plaintiffs and the indirect purchaser plaintiffs filed motions for class certification. On August 21,
2020, the district court granted in part the direct purchasers’ motion for class certification and certified a class of 35 direct purchasers, and on November 2, 2020,
the U.S. Court of Appeals for the Fourth Circuit granted the Merck Defendants’ motion for permission to appeal the district court’s order. Also, on August 14,
2020, the magistrate judge recommended that the court grant the motion for class certification filed by the putative indirect purchaser class. The Merck Defendants
objected to this report and recommendation and are awaiting a decision from the district court.

On August 10, 2020, the Merck Defendants filed a motion for summary judgment and other motions, and plaintiffs filed a motion for partial summary
judgment, and other motions. Those motions are now fully briefed, and the court will likely hold a hearing on the competing motions. Trial in this matter has been
adjourned.

On September 4, 2020, United Healthcare Services, Inc. filed a lawsuit in the United States District Court for the District of Minnesota against Merck
and  others  (the  UHC  Action).  The  UHC  Action  makes  similar  allegations  as  those  made  in  the  Zetia class  action.  On  September  23,  2020,  the  United  States
Judicial Panel on Multidistrict Litigation transferred the case to the Eastern District of Virginia to proceed with the multidistrict Zetia litigation already in progress.

On  December  11,  2020,  Humana  Inc.  filed  a  lawsuit  in  the  Superior  Court  of  the  State  of  California,  County  of  San  Francisco,  against  Merck  and
others,  alleging  defendants  violated  state  antitrust  laws  in  multiple  states.  Also,  on  December  11,  2020,  Centene  Corporation  and  others  filed  a  lawsuit  in  the
Superior Court of the State of California, County of San Francisco, against the same defendants as Humana. Both lawsuits allege similar anticompetitive acts to
those alleged in the Zetia class action.

Rotavirus Vaccines Antitrust Litigation

As  previously  disclosed,  MSD  is  a  defendant  in  putative  class  action  lawsuits  filed  in  2018  on  behalf  of  direct  purchasers  of  RotaTeq,  alleging
violations  of  federal  antitrust  laws.  The  cases  were  consolidated  in  the  Eastern  District  of  Pennsylvania.  In  January  2019,  the  court  denied  MSD’s  motions  to
compel arbitration and to dismiss the consolidated complaint. In February 2019, MSD appealed the court’s order on arbitration to the Third Circuit. In October
2019, the Third Circuit vacated the district court’s order and remanded for limited discovery on the issue of arbitrability. On July 6, 2020, MSD filed a renewed
motion to compel arbitration, and plaintiffs filed a cross motion for summary judgment as to arbitrability. On November 20, 2020, the district court denied MSD’s
motion and granted plaintiffs’ motion. On December 4, 2020, MSD filed a notice of appeal to the Third Circuit.

Bravecto Litigation

As previously disclosed, in January 2020, the Company was served with a complaint in the United States District Court for the District of New Jersey,
seeking to certify a nationwide class action of purchasers or users of Bravecto (fluralaner) products in the United States or its territories between May 1, 2014 and
December 27, 2019. The complaint contends Bravecto causes neurological events and alleges violations of the New Jersey Consumer

114

Table of Contents

Fraud Act, Breach of Warranty, Product Liability, and related theories. A similar case was filed in Quebec, Canada in May 2019.

Qui Tam Litigation

As previously disclosed, in June 2012, the U.S. District Court for the Eastern District of Pennsylvania unsealed a complaint that had been filed against
the Company under the federal  False Claims Act by two former  employees  alleging,  among other things, that the Company defrauded  the U.S. government  by
falsifying data in connection with a clinical study conducted on the mumps component of the Company’s M-M-R II vaccine. The complaint alleges the fraud took
place between 1999 and 2001. The U.S. government had the right to participate in and take over the prosecution of this lawsuit but notified the court that it declined
to exercise that right. The two former employees are pursuing the lawsuit without the involvement of the U.S. government. In addition, as previously disclosed, two
putative class action lawsuits on behalf of direct purchasers of the M‑M‑R II vaccine, which charge that the Company misrepresented the efficacy of the M-M-R II
vaccine in violation of federal antitrust laws and various state consumer protection laws, are pending in the Eastern District of Pennsylvania. In September 2014,
the court denied Merck’s motion to dismiss the False Claims Act suit and granted in part and denied in part its motion to dismiss the then-pending antitrust suit. As
a result, both the False Claims Act suit and the antitrust suits have proceeded into discovery, which is now complete, and the parties have filed and briefed cross-
motions for summary judgment, which are currently pending before the Court. The Company continues to defend against these lawsuits.

Merck KGaA Litigation

As previously disclosed, in January 2016, to protect its long-established brand rights in the United States, the Company filed a lawsuit against Merck
KGaA, Darmstadt, Germany (KGaA), historically operating as the EMD Group in the United States, alleging it improperly uses the name “Merck” in the United
States. KGaA has filed suit against the Company in France, the UK, Germany, Switzerland, Mexico, India, Australia, Singapore, Hong Kong, and China alleging,
among  other  things,  unfair  competition,  trademark  infringement  and/or  corporate  name  infringement.  In  the  UK,  Australia,  Singapore,  Hong  Kong,  and  India,
KGaA also alleges breach of the parties’ coexistence agreement. The litigation is ongoing in the United States with no trial date set, and also ongoing in numerous
jurisdictions outside of the United States; the Company is defending those suits in each jurisdiction.

Patent Litigation

From time to time, generic manufacturers of pharmaceutical products file abbreviated New Drug Applications (NDAs) with the FDA seeking to market
generic forms of the Company’s products prior to the expiration of relevant patents owned by the Company. To protect its patent rights, the Company may file
patent infringement lawsuits against such generic companies. Similar lawsuits defending the Company’s patent rights may exist in other countries. The Company
intends to vigorously defend its patents, which it believes are valid, against infringement by companies attempting to market products prior to the expiration of
such patents. As with any litigation, there can be no assurance of the outcomes, which, if adverse, could result in significantly shortened periods of exclusivity for
these products and, with respect to products acquired through acquisitions, potentially significant intangible asset impairment charges.

Bridion — Between  January  and  November  2020,  the  Company  received  multiple  Paragraph  IV  Certification  Letters  under  the  Hatch-Waxman  Act
notifying  the  Company  that  generic  drug  companies  have  filed  applications  to  the  FDA  seeking  pre-patent  expiry  approval  to  sell  generic  versions  of  Bridion
(sugammadex) Injection. In March, April and December 2020, the Company filed patent infringement lawsuits in the U.S. District Courts for the District of New
Jersey  and  the  Northern  District  of  West  Virginia  against  those  generic  companies.  All  actions  in  the  District  of  New  Jersey  have  been  consolidated.  These
lawsuits, which assert one or more patents covering sugammadex and methods of using sugammadex, automatically stay FDA approval of the generic applications
until June 2023 or until adverse court decisions, if any, whichever may occur earlier.

Mylan Pharmaceuticals Inc., Mylan API US LLC, and Mylan Inc. (Mylan) have filed motions to dismiss in the District of New Jersey for lack of venue
and failure to state a claim against certain defendants, and in the Northern District of West Virginia for failure to state a claim against certain defendants. The New
Jersey motion has not yet been decided, and the West Virginia action is stayed pending resolution of the New Jersey motion.

115

Table of Contents

Januvia,  Janumet,  Janumet  XR —  The  FDA  has  granted  pediatric  exclusivity  with  respect  to  Januvia, Janumet, and Janumet XR, which  provides  a
further six months of exclusivity in the United States beyond the expiration of all patents listed in the FDA’s Orange Book. Including this exclusivity, key patent
protection extends to January 2023. The Company anticipates that sales of Januvia and  Janumet in the United States will decline significantly after this loss of
market exclusivity. However, Januvia, Janumet, and Janumet XR contain sitagliptin phosphate monohydrate and the Company has another patent covering certain
phosphate salt and polymorphic forms of sitagliptin, which, if determined to be valid, would preclude generic manufacturers from making sitagliptin phosphate salt
and polymorphic forms before that patent, inclusive of pediatric exclusivity, expires in 2027 (2027 salt/polymorph patent). In 2019, Par Pharmaceutical filed suit
against the Company in the U.S. District Court for the District of New Jersey, seeking a declaratory judgment of invalidity of the 2027 salt/polymorph patent. In
response,  the  Company  filed  a  patent  infringement  lawsuit  in  the  U.S.  District  Court  for  the  District  of  Delaware  against  Par  Pharmaceutical  and  additional
companies that also indicated an intent to market generic versions of Januvia, Janumet, and Janumet XR following expiration of key patent protection, but prior to
the expiration of the 2027 salt/polymorph patent, and a later granted patent owned by the Company covering the Janumet formulation which, inclusive of pediatric
exclusivity, expires in 2029. The Company also filed a patent infringement lawsuit against Mylan in the Northern District of West Virginia. The Judicial Panel of
Multidistrict Litigation entered an order transferring the Company’s lawsuit against Mylan to the U.S. District Court for the District of Delaware for coordinated
and consolidated pretrial proceedings with the other cases pending in that district. The U.S. District Court for the District of Delaware has scheduled the lawsuits
for a single three-day trial on invalidity issues in October 2021. The Court has scheduled separate one-day trials on infringement issues in November 2021 through
January 2022, to the extent such trials are necessary. In the Company’s case against Mylan, the U.S. District Court for the Northern District of West Virginia has
conditionally scheduled a three-day trial in December 2021 on all issues.

The Company has settled with nine generic companies providing that these generic companies can bring their products to the market in May 2027 or

earlier under certain circumstances.

Additionally,  in  2019,  Mylan  filed  a  petition  for  Inter  Partes Review  (IPR)  at  the  United  States  Patent  and  Trademark  Office  (USPTO)  seeking
invalidity of some, but not all, of the claims of the 2027 salt/polymorph patent, which other manufacturers joined. The USPTO instituted IPR proceedings in May
2020, finding a reasonable likelihood that the challenged claims are not valid. A trial was held in February 2021 and a final decision is expected in May 2021. If the
challenges are successful, the unchallenged claims of the 2027 salt/polymorph patent will remain valid, subject to the court proceedings described above.

In  Germany,  two  generic  companies  have  sought  the  revocation  of  the  Supplementary  Protection  Certificate  (SPC)  for  Janumet.  If  the  generic
companies are successful, Janumet could lose market exclusivity in Germany as early as July 2022. Challenges to the Janumet SPC have also occurred in Portugal
and Finland, and could occur in other European countries.

Nexplanon — In June 2017, Microspherix LLC (Microspherix) sued the Company in the U.S District Court for the District of New Jersey asserting that
the manufacturing, use, sale and importation of Nexplanon infringed several of Microspherix’s patents that claim radio-opaque, implantable drug delivery devices.
Microspherix  is  claiming  damages  from  September  2014  until  those  patents  expire  in  May  2021.  The  Company  brought IPR  proceedings  in  the  USPTO  and
successfully stayed the district court action. The USPTO invalidated some, but not all, of the claims asserted against the Company. The Company appealed the
decisions  finding  claims  valid,  and the Court of Appeals  for the Federal  Circuit affirmed  the USPTO’s decisions.  The matter  is no longer  stayed  in the district
court, and the Company is currently litigating the invalidity and non-infringement of the remaining asserted claims.

Other Litigation

There are various other pending legal proceedings involving the Company, principally product liability and intellectual property lawsuits. While it is not
feasible  to  predict  the  outcome  of  such  proceedings,  in  the  opinion  of  the  Company,  either  the  likelihood  of  loss  is  remote  or  any  reasonably  possible  loss
associated with the resolution of such proceedings is not expected to be material to the Company’s financial condition, results of operations or cash flows either
individually or in the aggregate.

116

Table of Contents

Legal Defense Reserves

Legal defense costs expected to be incurred in connection with a loss contingency are accrued when probable and reasonably estimable. Some of the
significant  factors  considered  in  the  review  of  these  legal  defense  reserves  are  as  follows:  the  actual  costs  incurred  by  the  Company;  the  development  of  the
Company’s  legal  defense  strategy  and  structure  in  light  of  the  scope  of  its  litigation;  the  number  of  cases  being  brought  against  the  Company;  the  costs  and
outcomes of completed trials and the most current information regarding anticipated timing, progression, and related costs of pre-trial activities and trials in the
associated  litigation.  The  amount  of  legal  defense  reserves  as  of  December  31,  2020  and  2019  of  approximately  $250  million  and  $240  million,  respectively,
represents the Company’s best estimate of the minimum amount of defense costs to be incurred in connection with its outstanding litigation; however, events such
as  additional  trials  and  other  events  that  could  arise  in  the  course  of  its  litigation  could  affect  the  ultimate  amount  of  legal  defense  costs  to  be  incurred  by  the
Company. The Company will continue to monitor its legal defense costs and review the adequacy of the associated reserves and may determine to increase the
reserves at any time in the future if, based upon the factors set forth, it believes it would be appropriate to do so.

Environmental Matters

The Company and its subsidiaries are parties to a number of proceedings brought under the Comprehensive Environmental Response, Compensation
and  Liability  Act,  commonly  known as  Superfund,  and  other  federal  and  state  equivalents.  These  proceedings  seek  to  require  the  operators  of  hazardous  waste
disposal facilities, transporters of waste to the sites and generators of hazardous waste disposed of at the sites to clean up the sites or to reimburse the government
for cleanup costs. The Company has been made a party to these proceedings as an alleged generator of waste disposed of at the sites. In each case, the government
alleges that the defendants are jointly and severally liable for the cleanup costs. Although joint and several liability is alleged, these proceedings are frequently
resolved so that the allocation of cleanup costs among the parties more nearly reflects the relative contributions of the parties to the site situation. The Company’s
potential  liability  varies  greatly  from  site  to  site.  For  some  sites  the  potential  liability  is  de minimis and  for  others  the  final  costs  of  cleanup  have  not  yet  been
determined. While it is not feasible to predict the outcome of many of these proceedings brought by federal or state agencies or private litigants, in the opinion of
the  Company,  such  proceedings  should  not  ultimately  result  in  any  liability  which  would  have  a  material  adverse  effect  on  the  financial  condition,  results  of
operations or liquidity of the Company. The Company has taken an active role in identifying and accruing for these costs and such amounts do not include any
reduction for anticipated recoveries of cleanup costs from former site owners or operators or other recalcitrant potentially responsible parties.

In management’s opinion, the liabilities for all environmental matters that are probable and reasonably estimable have been accrued and totaled $67
million at both December 31, 2020 and 2019. These liabilities are undiscounted, do not consider potential recoveries from other parties and will be paid out over
the periods of remediation for the applicable sites, which are expected to occur primarily over the next 15 years. Although it is not possible to predict with certainty
the outcome of these matters, or the ultimate costs of remediation, management does not believe that any reasonably possible expenditures that may be incurred in
excess of the liabilities accrued should exceed approximately $65 million in the aggregate. Management also does not believe that these expenditures should result
in a material adverse effect on the Company’s financial condition, results of operations or liquidity for any year.

117

Table of Contents

11.    Equity

The Merck certificate of incorporation authorizes 6,500,000,000 shares of common stock and 20,000,000 shares of preferred stock.

Capital Stock

A summary of common stock and treasury stock transactions (shares in millions) is as follows:

Balance January 1
Purchases of treasury stock
Issuances 
Balance December 31

(1)

2020

2019

2018

Common 
Stock

Treasury 
Stock

Common 
Stock

Treasury 
Stock

Common 
Stock

Treasury 
Stock

3,577 
— 
— 
3,577 

1,038 
16 
(7)
1,047 

3,577 
— 
— 
3,577 

985 
66 
(13)
1,038 

3,577 
— 
— 
3,577 

880 
122 
(17)
985 

(1)     

Issuances primarily reflect activity under share-based compensation plans.

In 2018, the Company entered into accelerated share repurchase (ASR) agreements with two third-party financial institutions (the Dealers). Under the
ASR agreements, Merck agreed to purchase $5 billion of Merck’s common stock, in total, with an initial delivery of 56.7 million shares of Merck’s common stock,
based on the then-current market price, made by the Dealers to Merck, and payments of $5 billion made by Merck to the Dealers, which were funded with existing
cash  and  investments,  as  well  as  short-term  borrowings.  Upon  settlement  of  the  ASR  agreements  in  2019,  Merck  received  an  additional  7.7  million  shares  as
determined  by  the  average  daily  volume  weighted-average  price  of  Merck’s  common  stock  during  the  term  of  the  ASR  program,  less  a  negotiated  discount,
bringing the total shares received by Merck under this program to 64.4 million.

12.    Share-Based Compensation Plans

The Company has share-based compensation plans under which the Company grants restricted stock units (RSUs) and performance share units (PSUs)
to certain management level employees. In addition, employees and non-employee directors may be granted options to purchase shares of Company common stock
at the fair market value at the time of grant. These plans were approved by the Company’s shareholders.

At December 31, 2020, 100 million shares collectively were authorized for future grants under the Company’s share-based compensation plans. These

awards are settled with treasury shares.

Employee stock options are granted to purchase shares of Company stock at the fair market value at the time of grant. These awards generally vest one-
third each year over a three-year period, with a contractual term of 7-10 years. RSUs are stock awards that are granted to employees and entitle the holder to shares
of common stock as the awards vest. The fair value of the stock option and RSU awards is determined and fixed on the grant date based on the Company’s stock
price. PSUs are stock awards where the ultimate number of shares issued will be contingent on the Company’s performance against a pre-set objective or set of
objectives. The fair value of each PSU is determined on the date of grant based on the Company’s stock price. For RSUs and PSUs, dividends declared during the
vesting period are payable to the employees only upon vesting. Over the PSU performance period, the number of shares of stock that are expected to be issued will
be adjusted based on the probability of achievement of a performance target and final compensation expense will be recognized based on the ultimate number of
shares issued. RSU and PSU distributions will be in shares of Company stock after the end of the vesting or performance period, subject to the terms applicable to
such awards. PSU awards generally vest after three years. RSU awards generally vest one-third each year over a three-year period.

Total  pretax  share-based  compensation  cost  recorded  in  2020,  2019  and  2018  was  $475  million,  $417  million  and  $348  million,  respectively,  with

related income tax benefits of $65 million, $57 million and $55 million, respectively.

The Company uses the Black-Scholes option pricing model for determining the fair value of option grants. In applying this model, the Company uses
both historical  data  and current  market  data  to estimate  the fair  value  of its options. The Black-Scholes  model  requires  several  assumptions including  expected
dividend yield, risk-

118

 
  
Table of Contents

free interest rate, volatility, and term of the options. The expected dividend yield is based on historical patterns of dividend payments. The risk-free interest rate is
based on the rate at grant date of zero-coupon U.S. Treasury Notes with a term equal to the expected term of the option. Expected volatility is estimated using a
blend of historical and implied volatility. The historical component is based on historical monthly price changes. The implied volatility is obtained from market
data on the Company’s traded options. The expected life represents the amount of time that options granted are expected to be outstanding, based on historical and
forecasted exercise behavior.

The weighted average exercise price of options granted in 2020, 2019 and 2018 was $77.67, $80.05 and $58.15 per option, respectively. The weighted
average  fair  value  of  options  granted  in  2020,  2019  and  2018  was  $9.93,  $10.63  and  $8.26  per  option,  respectively,  and  were  determined  using  the  following
assumptions:

Years Ended December 31
Expected dividend yield
Risk-free interest rate
Expected volatility
Expected life (years)

2020

2019

2018

3.1 %
0.4 %
22.1 %
5.8

3.2 %
2.4 %
18.7 %
5.9

3.4 %
2.9 %
19.1 %
6.1

Summarized information relative to stock option plan activity (options in thousands) is as follows:

Weighted 
Average 
Exercise 
Price

Weighted 
Average 
Remaining 
Contractual 
Term (Years)

Aggregate 
Intrinsic 
Value

Number 
of Options

Outstanding January 1, 2020
Granted
Exercised
Forfeited
Outstanding December 31, 2020
Exercisable December 31, 2020

17,868 
3,564 
(1,685)
(301)
19,446 
13,141 

$

$
$

Additional information pertaining to stock option plans is provided in the table below:

Years Ended December 31
Total intrinsic value of stock options exercised
Fair value of stock options vested
Cash received from the exercise of stock options

A summary of nonvested RSU and PSU activity (shares in thousands) is as follows:

59.88 
77.67 
52.73 
67.73 
63.64 
58.30 

$

6.27 $
5.13 $

353 
309 

2020

2019

2018

$

51 
25 
89 

295  $
27 
361 

348 
29 
591 

Nonvested January 1, 2020
Granted
Vested
Forfeited
Nonvested December 31, 2020

RSUs

PSUs

Number 
of Shares

Weighted 
Average 
Grant Date 
Fair Value

Number 
of Shares

Weighted 
Average 
Grant Date 
Fair Value

13,527 
6,627 
(7,511)
(728)
11,915 

$

$

67.58 
77.79 
65.70 
72.06 
74.17 

$

1,972 
996 
(824)
(44)
2,100  $

69.18 
77.82 
64.01 
80.06 
75.08 

At December 31, 2020, there was $678 million of total pretax unrecognized compensation expense related to nonvested stock options, RSU and PSU

awards which will be recognized over a weighted average period of 1.9 years. For segment reporting, share-based compensation costs are unallocated expenses.

119

 
 
 
  
Table of Contents

13.    Pension and Other Postretirement Benefit Plans

The  Company  has  defined  benefit  pension  plans  covering  eligible  employees  in  the  United  States  and  in  certain  of  its  international  subsidiaries.  In
addition, the Company provides medical benefits, principally to its eligible U.S. retirees and their dependents, through its other postretirement benefit plans. The
Company uses December 31 as the year-end measurement date for all of its pension plans and other postretirement benefit plans.

Net Periodic Benefit Cost

The net periodic benefit cost (credit) for pension and other postretirement benefit plans consisted of the following components:

Years Ended December 31
Service cost
Interest cost
Expected return on plan assets
Amortization of unrecognized prior service cost
Net loss (gain) amortization
Termination benefits
Curtailments
Settlements
Net periodic benefit cost (credit)

2020

U.S.
2019

$

$

360 
431 
(774)
(49)
303 
10 
10 
13 
304 

$

$

293 
458 
(817)
(49)
151 
31 
14 
— 
81 

$

$

Pension Benefits

2018

2020

International
2019

2018

Other Postretirement Benefits
2019

2018

2020

326 
432 
(851)
(50)
232 
19 
10 
5 
123 

$

$

301 
137 
(415)
(18)
127 
3 
— 
15 
150 

$

$

238 
177 
(426)
(12)
64 
8 
6 
1 
56 

$

$

238 
178 
(431)
(13)
84 
2 
1 
13 
72 

$

$

52 
57 
(75)
(73)
(18)
2 
(4)
— 
(59)

$

$

48 
69 
(72)
(78)
(10)
5 
(11)
— 
(49)

$

$

57 
69 
(83)
(84)
1 
3 
(8)
— 
(45)

The  changes  in  net  periodic  benefit  cost  year  over  year  for  pension  plans  are  largely  attributable  to  changes  in  the  discount  rate  affecting  net  loss

amortization.

In connection with restructuring actions (see Note 5), termination charges were recorded in 2020, 2019 and 2018 on pension and other postretirement
benefit plans related to expanded eligibility for certain employees exiting Merck. Also, in connection with these restructuring activities, curtailments were recorded
on pension and other postretirement benefit plans and settlements were recorded on certain U.S. and international pension plans as reflected in the table above.

The components of net periodic benefit cost (credit) other than the service cost component are included in Other (income) expense, net (see Note 14),
with the exception of certain amounts for termination benefits, curtailments and settlements, which are recorded in Restructuring costs if the event giving rise to the
termination benefits, curtailment or settlement is related to restructuring actions as noted above.

120

Table of Contents

Obligations and Funded Status

Summarized  information  about the changes  in plan  assets  and benefit  obligations,  the funded status  and the amounts recorded  at  December  31 is as

follows:

Fair value of plan assets January 1
Actual return on plan assets
Company contributions
Effects of exchange rate changes
Benefits paid
Settlements
Other
Fair value of plan assets December 31

(1)

Benefit obligation January 1
Service cost
Interest cost
Actuarial losses (gains) 
Benefits paid
Effects of exchange rate changes
Plan amendments
Curtailments
Termination benefits
Settlements
Other
Benefit obligation December 31

Funded status December 31

Recognized as:
Other Assets
Accrued and other current liabilities
Other Noncurrent Liabilities

Pension Benefits

U.S.

International

Other 
Postretirement 
Benefits

2020

2019

2020

2019

2020

2019

$

$

$

$

$

$

11,361  $
1,908 
199 
— 
(751)
(45)
— 
12,672  $

13,003  $
360 
431 
1,594 
(751)
— 
— 
11 
10 
(45)
— 
14,613  $

9,648  $
2,165 
130 
— 
(582)
— 
— 
11,361  $

10,620  $
293 
458 
2,165 
(582)
— 
— 
18 
31 
— 
— 
13,003  $

10,163  $
1,026 
387 
746 
(215)
(117)
59 
12,049  $

10,612  $
301 
137 
1,036 
(215)
794 
(64)
(8)
3 
(117)
55 
12,534  $

$

8,580 
1,505 
262 
31 
(230)
(12)
27 
10,163  $

$

9,083 
238 
177 
1,313 
(230)
4 
1 
3 
8 
(12)
27 
10,612  $

(1,941)

$

(1,642)

$

(485)

$

(449)

—  $
(82)
(1,859)

—  $
(92)
(1,550)

941  $
(13)
(1,413)

837 
(18)
(1,268)

$

$

$

$

$

$

$

$

1,102 
175 
19 
— 
(93)
— 
18 
1,221 

1,673 
52 
57 
(98)
(93)
(3)
— 
(1)
2 
— 
18 
1,607 

(386)

— 
(9)
(377)

968 
203 
14 
— 
(104)
— 
21 
1,102 

1,615 
48 
69 
21 
(104)
1 
— 
— 
5 
— 
18 
1,673 

(571)

— 
(10)
(561)

(1)

 Actuarial losses (gains) primarily reflect changes in discount rates.

At December 31, 2020 and 2019, the accumulated benefit obligation was $26.4 billion and $22.8 billion, respectively, for all pension plans, of which

$14.4 billion and $12.8 billion, respectively, related to U.S. pension plans.

121

 
  
Table of Contents

Information related to the funded status of selected pension plans at December 31 is as follows:

Pension plans with a projected benefit obligation in excess of plan assets

Projected benefit obligation
Fair value of plan assets

Pension plans with an accumulated benefit obligation in excess of plan assets

Accumulated benefit obligation
Fair value of plan assets

Plan Assets

U.S.

International

2020

2019

2020

2019

$

$

14,613 
12,672 

13,489 
11,685 

$

$

13,003  $
11,361 

12,009  $
10,484 

$

$

8,951 
7,526 

4,288 
3,033 

7,421 
6,135 

2,476 
1,501 

Entities are required to use a fair value hierarchy which maximizes the use of observable inputs and minimizes the use of unobservable inputs when

measuring fair value. There are three levels of inputs used to measure fair value with Level 1 having the highest priority and Level 3 having the lowest:

Level 1 —  Quoted prices (unadjusted) in active markets for identical assets or liabilities.

Level 2 —  Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, or other inputs that are observable or can be

corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 —  Unobservable inputs that are supported by little or no market activity. The Level 3 assets are those whose values are determined using pricing
models, discounted cash flow methodologies, or similar techniques with significant unobservable inputs, as well as instruments for which the determination of
fair value requires significant judgment or estimation. At December 31, 2020 and 2019, $942 million and $860 million, respectively, or approximately 4% of
the Company’s pension investments were categorized as Level 3 assets.

If the inputs used to measure the financial assets fall within more than one level described above, the categorization is based on the lowest level input

that is significant to the fair value measurement of the instrument.

122

Table of Contents

The fair values of the Company’s pension plan assets at December 31 by asset category are as follows:

U.S. Pension Plans

Cash and cash equivalents
Investment funds

Developed markets equities
Emerging markets equities
Mortgage and asset-backed securities

Government and agency obligations

Equity securities

Developed markets
Fixed income securities

Government and agency obligations
Corporate obligations
Mortgage and asset-backed securities

Other investments

Plan assets at fair value

International Pension Plans

Cash and cash equivalents
Investment funds

Developed markets equities
Government and agency obligations
Emerging markets equities
Corporate obligations
Other fixed income obligations
Real estate
Equity securities

Developed markets
Fixed income securities

Government and agency obligations
Corporate obligations
Mortgage and asset-backed securities

Other investments

Insurance contracts 
Other

(2)

Plan assets at fair value

Fair Value Measurements Using

Fair Value Measurements Using

Level 1

Level 2
2020

Level 3

NAV 

(1)

Total

Level 1

Level 2
2019

Level 3

NAV 

(1)

Total

$

5 

$

— 

$

— 

$

303 

$

308 

$

3 

$

— 

$

— 

$

236 

$

239 

$

$

$

$

206 
169 
— 
— 

2,819 

— 
— 
— 
— 

3,199 

110 

475 
1,516 
154 
5 
9 
— 

505 

3 
1 
— 

— 
1 

$

$

— 
— 

89 
— 

— 

2,236 
1,994 
33 
— 

4,352 

1 

4,286 
2,614 
— 
12 
11 
1 

— 

486 
174 
70 

76 
5 

$

2,779 

$

7,736 

$

— 
— 
— 
— 

— 

— 
— 
— 
7 

7 

— 

— 
— 
— 
— 
— 
— 

— 

— 
— 
— 

935 
— 

935 

$

$

$

$

3,884 
927 
— 
— 

— 

— 
— 
— 
— 

5,114 

20 

118 
172 
92 
172 
4 
15 

— 

3 
2 
— 

1 
— 

$

$

4,090 
1,096 

89 
— 

2,819 

2,236 
1,994 
33 
7 

12,672 

131 

4,879 
4,302 
246 
189 
24 
16 

505 

492 
177 
70 

1,012 
6 

$

$

205 
165 

— 
— 

2,451 

— 
— 
— 
— 

2,824 

70 

546 
462 
66 
5 
9 
— 

565 

3 
1 
— 

— 
— 

$

$

— 
— 

— 
— 

— 

2,094 
1,582 
178 
— 

3,854 

1 

3,761 
2,534 
96 
11 
6 
1 

— 

376 
135 
61 

65 
5 

$

599 

$

12,049 

$

1,727 

$

7,052 

$

— 
— 

— 
— 

— 

— 
— 
— 
9 

9 

— 

— 
— 
— 
— 
— 
— 

— 

— 
— 
— 

851 
— 

851 

$

$

$

$

3,542 
723 

— 
173 

— 

— 
— 
— 
— 

4,674 

15 

96 
207 
90 
109 
— 
— 

— 

— 
— 
— 

— 
16 

3,747 
888 

— 
173 

2,451 
— 
2,094 
1,582 
178 
9 

11,361 

86 

4,403 
3,203 
252 
125 
15 
1 

565 

379 
136 
61 

916 
21 

$

533 

$

10,163 

(1)    

Certain investments that were measured at net asset value (NAV) per share or its equivalent have not been classified in the fair value hierarchy. The NAV amounts presented in this table are
intended to permit reconciliation of the fair value hierarchy to the fair value of plan assets at December 31, 2020 and 2019.

(2)    

The plans’ Level 3 investments in insurance contracts are generally valued using a crediting rate that approximates market returns and invest in underlying securities whose market values
are unobservable and determined using pricing models, discounted cash flow methodologies, or similar techniques.

123

 
  
Table of Contents

The table below provides a summary of the changes in fair value, including transfers in and/or out, of all financial assets measured at fair value using

significant unobservable inputs (Level 3) for the Company’s pension plan assets:

2020

2019

Insurance 
Contracts

Real 
Estate

Other

Total

Insurance 
Contracts

Real 
Estate

Other

Total

U.S. Pension Plans
Balance January 1
Actual return on plan assets:

Relating to assets still held at December 31
Relating to assets sold during the year

Purchases and sales, net
Balance December 31

International Pension Plans
Balance January 1
Actual return on plan assets:

Relating to assets still held at December 31

Purchases and sales, net
Transfers out of Level 3
Balance December 31

$

$

$

$

— 

$

— 

$

9 

$

9 

$

— 

$

— 

$

13 

$

— 
— 
— 
— 

851 

103 
(17)
(2)
935 

$

$

$

— 
— 
— 
— 

— 

— 
— 
— 
— 

$

$

$

(5)
5 
(2)
7 

— 

— 
— 
— 
— 

$

$

$

(5)
5 
(2)
7 

851 

103 
(17)
(2)
935 

$

$

$

— 
— 
— 
— 

811 

54 
(14)
— 
851 

$

$

$

— 
— 
— 
— 

1 

— 
(1)
— 
— 

$

$

$

(8)
8 
(4)
9 

1 

— 
(1)
— 
— 

$

$

$

The fair values of the Company’s other postretirement benefit plan assets at December 31 by asset category are as follows:

Fair Value Measurements Using

Fair Value Measurements Using

Level 1

Level 2

2020

Level 3

NAV 

(1)

Total

Level 1

Level 2

2019

Level 3

NAV 

(1)

Total

$

31 

$

— 

$

— 

$

28 

$

59 

$

52 

$

— 

$

— 

$

22 

$

Cash and cash equivalents
Investment funds

Developed markets equities
Emerging markets equities
Government and agency obligations
Mortgage and asset-backed securities

Equity securities

Developed markets
Fixed income securities

Government and agency obligations
Corporate obligations
Mortgage and asset-backed securities

19 
16 
1 
— 

258 

— 
— 
— 

— 
— 
— 
8 

— 

221 
196 
3 

428 

$

— 
— 
— 
— 

— 

— 
— 
— 

— 

355 
85 
— 
— 

— 

— 
— 
— 

374 
101 
1 
8 

258 

221 
196 
3 

19 
15 
1 
— 

225 

— 
— 
— 

$

468 

$

1,221 

$

312 

$

— 
— 
— 
— 

— 

196 
149 
17 

362 

$

— 
— 
— 
— 

— 

— 
— 
— 

— 

324 
66 
16 
— 

— 

— 
— 
— 

13 

(8)
8 
(4)
9 

813 

54 
(16)
— 
851 

74 

343 
81 
17 
— 
— 
225 

196 
149 
17 

Plan assets at fair value

$

325 

$

$

428 

$

1,102 

(1)    

Certain investments that were measured at net asset value (NAV) per share or its equivalent have not been classified in the fair value hierarchy. The NAV amounts presented in this table are
intended to permit reconciliation of the fair value hierarchy to the fair value of plan assets at December 31, 2020 and 2019.

The Company has established investment guidelines for its U.S. pension and other postretirement plans to create an asset allocation that is expected to
deliver a rate of return sufficient to meet the long-term obligation of each plan, given an acceptable level of risk. The target investment portfolio of the Company’s
U.S. pension and other postretirement benefit plans is allocated 30% to 45% in U.S. equities, 15% to 30% in international equities, 35% to 45% in fixed-income
investments, and up to 5% in cash and other investments. The portfolio’s equity weighting is consistent with the long-term nature of the plans’ benefit obligations.
The  expected  annual  standard  deviation  of  returns  of  the  target  portfolio,  which  approximates  11%,  reflects  both  the  equity  allocation  and  the  diversification
benefits among the asset classes in which the portfolio invests. For international pension plans, the

124

 
  
 
  
  
  
  
Table of Contents

targeted investment portfolio varies based on the duration of pension liabilities and local government rules and regulations. Although a significant percentage of
plan assets are invested in U.S. equities, concentration risk is mitigated through the use of strategies that are diversified within management guidelines.

Expected Contributions

Expected contributions during 2021 are approximately $300 million for U.S. pension plans, approximately $170 million for international pension plans

and approximately $35 million for other postretirement benefit plans.

Expected Benefit Payments

Expected benefit payments are as follows:

2021
2022
2023
2024
2025
2026 — 2030

$

$

U.S. Pension Benefits
816 
786 
781 
772 
782 
4,271 

International Pension 
Benefits

Other 
Postretirement 
Benefits

$

274 
277 
284 
285 
287 
1,688 

85 
86 
87 
89 
91 
474 

Expected benefit payments are based on the same assumptions used to measure the benefit obligations and include estimated future employee service.

Amounts Recognized in Other Comprehensive Income

Net loss amounts reflect differences between expected and actual returns on plan assets as well as the effects of changes in actuarial assumptions. Net
loss  amounts  in  excess  of  certain  thresholds  are  amortized  into  net  periodic  benefit  cost  over  the  average  remaining  service  life  of  employees.  The  following
amounts were reflected as components of OCI:

Years Ended December 31
Net (loss) gain arising during the period
Prior service (cost) credit arising during the period

Net loss (gain) amortization included in benefit cost
Prior service credit amortization included in benefit cost

Pension Plans

2020

U.S.
2019

2018

2020

International
2019

2018

2020

Other Postretirement 
Benefit Plans
2019

2018

$

$

$

$

(448)
(1)
(449)

303 
(49)
254 

$

$

$

$

(816)
(4)
(820)

151 
(49)
102 

$

$

$

$

(397)
(4)
(401)

232 
(50)
182 

$

$

$

$

(407)
62 
(345)

127 
(18)
109 

$

$

$

$

(227)
(1)
(228)

64 
(12)
52 

$

$

$

$

(505)
(10)
(515)

84 
(13)
71 

$

$

$

$

198 
(3)
195 

(18)
(73)
(91)

$

$

$

$

112 
(11)
101 

(10)
(78)
(88)

$

$

$

$

186 
2 
188 

1 
(84)
(83)

125

 
 
 
Table of Contents

Actuarial Assumptions

The Company reassesses its benefit plan assumptions on a regular basis. The weighted average assumptions used in determining U.S. pension and other

postretirement benefit plan and international pension plan information are as follows:

December 31
Net periodic benefit cost
Discount rate
Expected rate of return on plan assets
Salary growth rate
Interest crediting rate
Benefit obligation
Discount rate
Salary growth rate
Interest crediting rate

U.S. Pension and Other 
Postretirement Benefit Plans

International Pension Plans

2020

2019

2018

2020

2019

2018

3.40  %
7.30  %
4.20  %
4.90  %

2.70  %
4.60  %
4.70  %

4.40  %
8.10  %
4.30  %
3.40  %

3.40  %
4.20  %
4.90  %

3.70  %
8.20  %
4.30  %
3.30  %

4.40  %
4.30  %
3.40  %

1.50 %
4.40 %
2.80 %
2.80 %

1.10 %
2.80 %
3.00 %

2.20 %
4.90 %
2.80 %
2.90 %

1.50 %
2.80 %
2.80 %

2.10 %
5.10 %
2.90 %
2.80 %

2.20 %
2.80 %
2.90 %

For both the pension and other postretirement benefit plans, the discount rate is evaluated on measurement dates and modified to reflect the prevailing
market rate of a portfolio of high-quality fixed-income debt instruments that would provide the future cash flows needed to pay the benefits included in the benefit
obligation  as they come due. The expected  rate  of return  for  both the pension and other  postretirement  benefit  plans represents  the average  rate  of return to be
earned on plan assets over the period the benefits included in the benefit obligation are to be paid and is determined on a plan basis. The expected rate of return for
each  plan  is  developed  considering  long-term  historical  returns  data,  current  market  conditions,  and  actual  returns  on  the  plan  assets.  Using  this  reference
information,  the  long-term  return  expectations  for  each  asset  category  and  a  weighted-average  expected  return  for  each  plan’s  target  portfolio  is  developed
according to the allocation among those investment categories. The expected portfolio performance reflects the contribution of active management as appropriate.
For 2021, the expected rate of return for the Company’s U.S. pension and other postretirement benefit plans will range from 6.50% to 6.70%, as compared to a
range of 7.00% to 7.30% in 2020.

The health care cost trend rate assumptions for other postretirement benefit plans are as follows:

December 31
Health care cost trend rate assumed for next year
Rate to which the cost trend rate is assumed to decline
Year that the trend rate reaches the ultimate trend rate

Savings Plans

2020

2019

6.6 %
4.5 %
2032

6.8 %
4.5 %
2032

The  Company  also  maintains  defined  contribution  savings  plans  in  the  United  States.  The  Company  matches  a  percentage  of  each  employee’s
contributions consistent with the provisions of the plan for which the employee is eligible. Total employer contributions to these plans in 2020, 2019 and 2018 were
$166 million, $149 million and $136 million, respectively.

126

 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

14.    Other (Income) Expense, Net

Other (income) expense, net, consisted of:

Years Ended December 31
Interest income
Interest expense
Exchange losses
Income from investments in equity securities, net
Net periodic defined benefit plan (credit) cost other than service cost
Other, net

 (1)

2020

2019

2018

$

$

(59) $
831 
145 
(1,338)
(339)
(126)
(886) $

(274) $
893 
187 
(170)
(545)
48 
139  $

(343)
772 
145 
(324)
(512)
(140)
(402)

(1) 

Includes net realized and unrealized gains and losses from investments in equity securities either owned directly or through ownership interests in investment funds. Unrealized gains and
losses from investments that are directly owned are determined at the end of the reporting period, while ownership interests in investment funds are accounted for on a one quarter lag.

Other, net (as presented in the table above) in 2019 includes $162 million of goodwill impairment charges related to certain businesses in the Healthcare

Services segment (see Note 8).

Other, net in 2018 includes a gain of $115 million related to the settlement of certain patent litigation, income of $99 million related to AstraZeneca’s
option exercise in 2014 in connection with the termination of the Company’s relationship with AstraZeneca LP (AZLP), and a gain of $85 million resulting from
the  receipt  of  a  milestone  payment  for  an  out-licensed  migraine  clinical  development  program.  Other,  net  in  2018  also  includes  $144  million  of  goodwill
impairment charges related to certain businesses in the Healthcare Services segment (see Note 8), as well as $41 million of charges related to the write-down of
assets held for sale to fair value in anticipation of the dissolution of the Company’s joint venture with Supera Farma Laboratorios S.A. in Brazil.

Interest paid was $822 million in 2020, $841 million in 2019 and $777 million in 2018.

15.    Taxes on Income

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

U.S. statutory rate applied to income before taxes
Differential arising from:

Foreign earnings
GILTI and the foreign-derived intangible income

deduction
R&D tax credit
Tax settlements
Acquisition of VelosBio
Restructuring
Acquisition of OncoImmune
State taxes
Acquisition-related costs, including amortization
Valuation allowances
Acquisition of Peloton
Tax Cuts and Jobs Act of 2017
Other

2020

2019

2018

Amount

Tax Rate

Amount

Tax Rate

Amount

Tax Rate

$

1,846 

21.0  % $

2,408 

21.0  % $

1,827 

21.0  %

(1,242)

(14.1)

(1,020)

(8.9)

364 
(110)
(13)
559 
105 
97 
67 
46 
42 
— 
— 
(52)
1,709 

$

4.1 
(1.3)
(0.2)
6.3 
1.2 
1.1 
0.8 
0.5 
0.5 
— 
— 
(0.5)
19.4  % $

336 
(118)
(403)
— 
39 
— 
(2)
95 
113 
209 
117 
(87)
1,687 

2.9 
(1.0)
(3.5)
— 
0.3 
— 
— 
0.8 
1.0 
1.8 
1.0 
(0.7)
14.7  % $

(245)

(25)
(96)
(22)
— 
56 
— 
201 
267 
269 
— 
289 
(13)
2,508 

(2.8)

(0.3)
(1.1)
(0.3)
— 
0.6 
— 
2.3 
3.1 
3.1 
— 
3.3 
(0.1)
28.8  %

127

 
 
  
 
Table of Contents

The  Tax  Cuts  and  Jobs  Act  (TCJA)  was  enacted  in  December  2017  and  the  Company  reflected  the  impact  of  the  TCJA  in  its  2017  financial
statements.  However,  since  application  of  certain  provisions  of  the  TCJA  remained  subject  to  further  interpretation,  in  certain  instances  the  Company  made
reasonable estimates of the effects of the TCJA, which were since finalized and resulted in additional income tax expense in 2018 and 2019. The Company’s
remaining  transition  tax  liability  under  the  TCJA,  which  has  been  reduced  by  payments  and  the  utilization  of  foreign  tax  credits,  was  $3.0  billion  at
December 31, 2020, of which $390 million is included in Income taxes payable and the remainder of $2.6 billion is included in Other Noncurrent Liabilities. As
a result of the transition tax under the TCJA, the Company is no longer indefinitely reinvested with respect to its undistributed earnings from foreign subsidiaries
and  has  provided  a  deferred  tax  liability  for  foreign  withholding  taxes  that  would  apply.  The  Company  remains  indefinitely  reinvested  with  respect  to  its
financial statement basis in excess of tax basis of its foreign subsidiaries. A determination of the deferred tax liability with respect to this basis difference is not
practicable.

The foreign earnings tax rate differentials in the tax rate reconciliation above primarily reflect the impacts of operations in jurisdictions with different
tax rates than the United States, particularly Ireland and Switzerland, as well as Singapore and Puerto Rico which operate under tax incentive grants (which begin
to expire in 2022), thereby yielding a favorable impact on the effective tax rate compared with the U.S. statutory rate of 21%. Towards the end of 2020, a new
reduced tax rate arrangement was agreed to in Switzerland for certain newly active legal entities.

Income before taxes consisted of:

Years Ended December 31
Domestic
Foreign

Taxes on income consisted of:

Years Ended December 31
Current provision

Federal
Foreign
State

Deferred provision

Federal
Foreign
State

2020

2019

2018

(3,492) $
12,283 
8,791  $

439  $

11,025 
11,464  $

3,717 
4,984 
8,701 

2020

2019

2018

962  $

514  $

1,362 
53 
2,377 

(605)
(40)
(23)
(668)
1,709  $

1,806 
(77)
2,243 

(330)
(240)
14 
(556)
1,687  $

536 
2,281 
200 
3,017 

(402)
(64)
(43)
(509)
2,508 

$

$

$

$

128

 
 
 
 
Table of Contents

Deferred income taxes at December 31 consisted of:

Product intangibles and licenses
Inventory related
Accelerated depreciation
Equity investments
Pensions and other postretirement benefits
Compensation related
Unrecognized tax benefits
Net operating losses and other tax credit carryforwards
Other
Subtotal
Valuation allowance
Total deferred taxes
Net deferred income taxes
Recognized as:
Other Assets
Deferred Income Taxes

2020

2019

Assets

Liabilities

Assets

Liabilities

$

$

$

141  $
43 
— 
— 
834 
252 
117 
794 
808 
2,989 
(433)
2,556  $
$

894 

1,250 
335 
588 
175 
248 
— 
— 
— 
81 
2,677 

2,677 
121 

$

$

$

442  $
32 
— 
— 
785 
322 
109 
897 
764 
3,351 
(1,100)
2,251  $
$

719 

1,778 
354 
594 
— 
191 
— 
— 
— 
84 
3,001 

3,001 
750 

$

1,015 

$

1,470 

The Company has net operating loss (NOL) carryforwards in several jurisdictions. As of December 31, 2020, $464 million of deferred taxes on NOL
carryforwards relate to foreign jurisdictions. Valuation allowances of $433 million have been established on these foreign NOL carryforwards and other foreign
deferred tax assets. In addition, the Company has $330 million of deferred tax assets relating to various U.S. tax credit carryforwards and NOL carryforwards, all
of which are expected to be fully utilized prior to expiry.

Income taxes paid in 2020, 2019 and 2018 were $2.7 billion, $4.5 billion and $1.5 billion, respectively. Tax benefits relating to stock option exercises

were $55 million in 2020, $65 million in 2019 and $77 million in 2018.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

Balance January 1
Additions related to current year positions
Additions related to prior year positions
Reductions for tax positions of prior years 
Settlements
Lapse of statute of limitations 
Balance December 31

 (1)

(2)

(1)

2020

2019

2018

$

$

1,225  $
298 
110 
(4)
(70)
(22)
1,537  $

1,893  $
199 
46 
(454)
(356)
(103)
1,225  $

1,723 
221 
142 
(73)
(91)
(29)
1,893 

(1)    

Amounts in 2019 reflects the settlement with the IRS discussed below.

(2)

 Amount in 2019 includes $78 million related to the divestiture of Merck’s Consumer Care business in 2014.

If  the  Company  were  to  recognize  the  unrecognized  tax  benefits  of  $1.5  billion  at  December  31,  2020,  the  income  tax  provision  would  reflect  a

favorable net impact of $1.5 billion.

129

 
  
 
 
 
 
 
 
Table of Contents

The Company is under examination by numerous tax authorities in various jurisdictions globally. The Company believes that it is reasonably possible
that the total amount of unrecognized tax benefits as of December 31, 2020 could decrease by up to approximately $160 million in the next 12 months as a result of
various  audit  closures,  settlements  or  the  expiration  of  the  statute  of  limitations.  The  ultimate  finalization  of  the  Company’s  examinations  with  relevant  taxing
authorities  can  include  formal  administrative  and  legal  proceedings,  which  could  have  a  significant  impact  on  the  timing  of  the  reversal  of  unrecognized  tax
benefits. The Company believes that its reserves for uncertain tax positions are adequate to cover existing risks or exposures.

Interest and penalties associated with uncertain tax positions amounted to an expense (benefit) of $27 million in 2020, $(101) million in 2019 and $51
million in 2018. These amounts reflect the beneficial impacts of various tax settlements, including the settlement discussed below. Liabilities for accrued interest
and penalties were $268 million and $243 million as of December 31, 2020 and 2019, respectively.

In  2019,  the  Internal  Revenue  Service  (IRS)  concluded  its  examinations  of  Merck’s  2012-2014  U.S.  federal  income  tax  returns.  As  a  result,  the
Company was required to make a payment of $107 million. The Company’s reserves for unrecognized tax benefits for the years under examination exceeded the
adjustments relating to this examination period and therefore the Company recorded a $364 million net tax benefit in 2019. This net benefit reflects reductions in
reserves for unrecognized tax benefits for tax positions relating to the years that were under examination, partially offset by additional reserves for tax positions not
previously reserved for.

The  IRS  is  currently  conducting  examinations  of  the  Company’s  tax  returns  for  the  years  2015  and  2016.  In  addition,  various  state  and  foreign  tax

examinations are in progress and for these jurisdictions, the Company’s income tax returns are open for examination for the period 2003 through 2020.

16.    Earnings per Share

The calculations of earnings per share (shares in millions) are as follows:

Years Ended December 31
Net income attributable to Merck & Co., Inc.
Average common shares outstanding
Common shares issuable 
Average common shares outstanding assuming dilution
Basic earnings per common share attributable to Merck & Co., Inc. common shareholders
Earnings per common share assuming dilution attributable to Merck & Co., Inc. common shareholders

(1)

2020

2019

2018

$

$
$

7,067  $
2,530 
11 
2,541 
2.79  $
2.78  $

9,843  $
2,565 
15 
2,580 
3.84  $
3.81  $

6,220 
2,664 
15 
2,679 
2.34 
2.32 

(1)    

 Issuable primarily under share-based compensation plans.

In  2020,  2019  and  2018,  5  million,  2  million  and  6  million,  respectively,  of  common  shares  issuable  under  share-based  compensation  plans  were

excluded from the computation of earnings per common share assuming dilution because the effect would have been antidilutive.

130

Table of Contents

17.   Other Comprehensive Income (Loss)

Changes in AOCI by component are as follows:

Balance January 1, 2018, net of taxes

$

(108)

$

(61)

$

(2,787)

$

(1,954)

$

(4,910)

Derivatives

Investments

Employee 
Benefit 
Plans

Cumulative 
Translation 
Adjustment

Accumulated Other 
Comprehensive 
Income (Loss)

Other comprehensive income (loss) before reclassification
adjustments, pretax
Tax

Other comprehensive income (loss) before reclassification adjustments,
net of taxes

Reclassification adjustments, pretax
Tax

Reclassification adjustments, net of taxes
Other comprehensive income (loss), net of taxes

Adoption of ASU 2018-02
Adoption of ASU 2016-01

Balance at December 31, 2018, net of taxes

Other comprehensive income (loss) before reclassification
adjustments, pretax
Tax

Other comprehensive income (loss) before reclassification adjustments,
net of taxes

Reclassification adjustments, pretax
Tax

Reclassification adjustments, net of taxes
Other comprehensive income (loss), net of taxes

Balance at December 31, 2019, net of taxes

Other comprehensive income (loss) before reclassification
adjustments, pretax
Tax

Other comprehensive income (loss) before reclassification
adjustments, net of taxes

Reclassification adjustments, pretax
Tax

Reclassification adjustments, net of taxes
Other comprehensive income (loss), net of taxes

Balance at December 31, 2020, net of taxes

$

(1)

(1)

(1)

228 
(55)

173 
157 
(33)
124 
297 

(23)
— 

166 

86 
(15)

71 
(261)
55 
(206)
(135)
31 

(383)
84 

(299)
2 
— 
2 
(297)
(266)

$

(108)
1 

(107)
97 
— 
97 
(10)

(2)

1 
(8)

(78)

140 
— 

140 
(44)
— 
(44)
96 
18 

3 
— 

3 
(21)
— 
(21)
(18)
— 

(2)

(2)

(3)

(728)
169 

(559)
170 
(36)
134 
(425)

(344)
— 

(3,556)

(948)
192 

(756)
66 
(15)
51 
(705)
(4,261)

(3)

(4)

(599)
111 

(488)
272 
(63)
209 
(279)
(4,540)

(3)

(4)

$

$

(84)
(139)

(223)
— 
— 
— 
(223)

100 
— 

(2,077)

112 
(16)

96 
— 
— 
— 
96 
(1,981)

64 
89 

153 
— 
— 
— 
153 
(1,828)

$

(692)
(24)

(716)
424 
(69)
355 
(361)

(266)
(8)

(5,545)

(610)
161 

(449)
(239)
40 
(199)
(648)
(6,193)

(915)
284 

(631)
253 
(63)
190 
(441)
(6,634)

(1)

(2)    

(3)    

(4)    

Relates to foreign currency cash flow hedges that were reclassified from AOCI to Sales.
Represents net realized (gains) losses on the sales of available-for-sale investments that were reclassified from AOCI to Other (income) expense, net.
Includes net amortization of prior service cost and actuarial gains and losses included in net periodic benefit cost (see Note 13).
Includes pension plan net loss of $5.4 billion and $5.1 billion at December 31, 2020 and 2019, respectively, and other postretirement benefit plan net gain of $391 million and $247 million
at  December  31,  2020  and  2019,  respectively,  as  well  as  pension  plan  prior  service  credit  of  $255  million  and  $263  million  at  December  31,  2020  and  2019,  respectively,  and  other
postretirement benefit plan prior service credit of $244 million and $305 million at December 31, 2020 and 2019, respectively.

131

Table of Contents

18.    Segment Reporting

The Company’s operations are principally managed on a products basis and include two operating segments, which are the Pharmaceutical and Animal

Health segments, both of which are reportable segments.

The Pharmaceutical segment includes human health pharmaceutical and vaccine products. Human health pharmaceutical products consist of therapeutic
and  preventive  agents,  generally  sold  by  prescription,  for  the  treatment  of  human  disorders.  The  Company  sells  these  human  health  pharmaceutical  products
primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy
benefit managers and other institutions. Human health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at
physician offices. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities. A large
component of pediatric and adolescent vaccine sales are made to the U.S. Centers for Disease Control and Prevention Vaccines for Children program, which is
funded by the U.S. government. Additionally, the Company sells vaccines to the Federal government for placement into vaccine stockpiles.

The Animal Health segment discovers, develops, manufactures and markets a wide range of veterinary pharmaceutical and vaccine products, as well as
health management solutions and services, for the prevention, treatment and control of disease in all major livestock and companion animal species. The Company
also  offers  an  extensive  suite  of  digitally  connected  identification,  traceability  and  monitoring  products.  The  Company  sells  its  products  to  veterinarians,
distributors and animal producers.

The Company previously had a Healthcare Services segment that provided services and solutions focused on engagement, health analytics and clinical

services to improve the value of care delivered to patients. The Company divested the remaining businesses in this segment in the first quarter of 2020.

The Company previously had an Alliances segment that primarily included activity from the Company’s relationship with AstraZeneca LP related to

sales of Nexium and Prilosec, which concluded in 2018.

132

Table of Contents

Sales of the Company’s products were as follows:

Years Ended December 31

Pharmaceutical:
Oncology

U.S.

2020

Int’l

Total

U.S.

2019

Int’l

Total

U.S.

2018

Int’l

Total

Keytruda
Alliance revenue - Lynparza 
Alliance revenue - Lenvima 
Emend

(1)

(1)

$

Vaccines

Gardasil/Gardasil 9
ProQuad/M-M-R II/Varivax
Pneumovax 23
RotaTeq
Vaqta

Hospital Acute Care

Bridion
Noxafil
Prevymis
Primaxin
Cancidas
Invanz
Cubicin
Zerbaxa
Immunology
Simponi
Remicade
Neuroscience
Belsomra

Virology

Isentress/Isentress HD
Zepatier
Cardiovascular
Zetia
Vytorin
Atozet
Alliance revenue - Adempas 
Adempas

(2)

Diabetes

Januvia
Janumet
Women’s Health

Implanon/Nexplanon
NuvaRing
Diversified Brands
Singulair
Cozaar/Hyzaar
Arcoxia
Nasonex
Follistim AQ
Other pharmaceutical 

(3)

$

8,352 
417 
359 
18 

1,755 
1,378 
727 
486 
103 

583 
42 
119 
2 
7 
9 
46 
74 

— 
— 

81 

326 
60 

(1)
12 
— 
259 
— 

1,470 
477 

488 
110 

18 
21 
— 
12 
84 
1,555 

6,028 
308 
220 
127 

2,184 
500 
359 
311 
67 

615 
287 
162 
248 
207 
202 
106 
56 

838 
330 

247 

531 
107 

483 
171 
453 
22 
220 

1,836 
1,494 

192 
127 

444 
365 
258 
206 
109 
3,152 

$

$

14,380 
725 
580 
145 

3,938 
1,878 
1,087 
797 
170 

1,198 
329 
281 
251 
213 
211 
152 
130 

838 
330 

327 

857 
167 

482 
182 
453 
281 
220 

3,306 
1,971 

680 
236 

462 
386 
258 
218 
193 
4,709 

$

6,305 
269 
239 
183 

1,831 
1,683 
679 
506 
130 

533 
282 
84 
2 
6 
30 
92 
63 

— 
— 

92 

398 
118 

14 
16 
— 
194 
— 

1,724 
589 

568 
742 

29 
24 
— 
9 
103 
1,416 

4,779 
176 
165 
205 

1,905 
592 
247 
284 
108 

598 
380 
81 
271 
242 
233 
165 
58 

830 
411 

214 

576 
252 

575 
269 
391 
10 
215 

1,758 
1,452 

219 
136 

669 
418 
288 
284 
138 
3,204 

$

$

11,084 
444 
404 
388 

3,737 
2,275 
926 
791 
238 

1,131 
662 
165 
273 
249 
263 
257 
121 

830 
411 

306 

975 
370 

590 
285 
391 
204 
215 

3,482 
2,041 

787 
879 

698 
442 
288 
293 
241 
4,615 

$

4,150 
127 
95 
312 

1,873 
1,430 
627 
496 
127 

$

3,021 
61 
54 
210 

1,279 
368 
281 
232 
112 

386 
353 
46 
7 
12 
253 
191 
42 

— 
— 

96 

513 
8 

45 
10 
— 
134 
— 

1,969 
811 

495 
722 

20 
23 
— 
23 
115 
1,231 

531 
389 
27 
258 
314 
243 
176 
45 

893 
582 

164 

627 
447 

813 
487 
347 
5 
190 

1,718 
1,417 

208 
180 

688 
431 
335 
353 
153 
3,308 

7,171 
187 
149 
522 

3,151 
1,798 
907 
728 
239 

917 
742 
72 
265 
326 
496 
367 
87 

893 
582 

260 

1,140 
455 

857 
497 
347 
139 
190 

3,686 
2,228 

703 
902 

708 
453 
335 
376 
268 
4,546 

Total Pharmaceutical segment sales

19,449 

23,572 

43,021 

18,953 

22,798 

41,751 

16,742 

20,947 

37,689 

Animal Health:
Livestock
Companion Animals

Total Animal Health segment sales

Other segment sales 

(4)

Total segment sales

Other 

(5)

612 
872 

1,484 

23 

20,956 

71 

2,327 
892 

3,219 

— 

26,791 

176 

2,939 
1,764 

4,703 

23 

47,747 

247 

582 
724 

1,306 

174 

20,433 

86 

2,201 
885 

3,086 

1 

25,885 

436 

2,784 
1,609 

4,393 

175 

46,319 

521 

528 
710 

1,238 

248 

18,228 

118 

2,102 
872 

2,974 

2 

23,923 

26 

2,630 
1,582 

4,212 

250 

42,151 

143 

$

21,027 

$

26,967 

$

47,994 

$

20,519 

$

26,321 

$

46,840 

$

18,346 

$

23,949 

$

42,294 

U.S. plus international may not equal total due to rounding.
(1)

     Alliance revenue represents Merck’s share of profits, which are product sales net of cost of sales and commercialization costs (see Note 4).
     Alliance revenue represents Merck’s share of profits from sales in Bayer’s marketing territories, which are product sales net of cost of sales and commercialization costs (see Note 4).
    Other pharmaceutical primarily reflects sales of other human health pharmaceutical products, including products within the franchises not listed separately.
    Represents sales for the non-reportable segments of Healthcare Services (fully divested in the first quarter of 2020) and Alliances (which concluded in 2018).
    Other is primarily comprised of miscellaneous corporate revenues, including revenue hedging activities, as well as third-party manufacturing sales.

(2)

(3)

(4)

(5)

133

 
Table of Contents

Consolidated sales by geographic area where derived are as follows:

Years Ended December 31
United States
Europe, Middle East and Africa
China
Japan
Asia Pacific (other than China and Japan)
Latin America
Other

A reconciliation of segment profits to Income before taxes is as follows:

Years Ended December 31
Segment profits:

Pharmaceutical segment
Animal Health segment
Other segments
Total segment profits
Other profits
Unallocated:

Interest income
Interest expense
Depreciation and amortization
Research and development
Amortization of purchase accounting adjustments
Restructuring costs
Charge related to the termination of a collaboration with Samsung
Other unallocated, net

Income Before Taxes

2020

2019

2018

21,027  $
13,600 
3,624 
3,376 
2,864 
2,274 
1,229 
47,994  $

20,519  $
12,707 
3,207 
3,583 
2,943 
2,469 
1,412 
46,840  $

18,346 
12,213 
2,184 
3,212 
2,909 
2,415 
1,015 
42,294 

2020

2019

2018

29,722  $
1,650 
1 
31,373 
140 

59 
(831)
(1,602)
(13,072)
(1,168)
(578)
— 
(5,530)
8,791  $

28,324  $
1,609 
(7)
29,926 
363 

274 
(893)
(1,593)
(9,499)
(1,406)
(638)
— 
(5,070)
11,464  $

24,871 
1,659 
103 
26,633 
6 

343 
(772)
(1,352)
(9,432)
(2,664)
(632)
(423)
(3,006)
8,701 

$

$

$

$

Pharmaceutical  segment  profits  are  comprised  of  segment  sales  less  standard  costs,  as  well  as  selling,  general  and  administrative  expenses  directly
incurred  by  the  segment.  Animal  Health  segment  profits  are  comprised  of  segment  sales,  less  all  cost  of  sales,  as  well  as  selling,  general  and  administrative
expenses and research and development costs directly incurred by the segment. For internal management reporting presented to the chief operating decision maker,
Merck  does not  allocate  the  remaining  cost  of  sales  not included  in  segment  profits  as  described  above,  research  and  development  expenses  incurred  in  Merck
Research Laboratories, the Company’s research and development division that focuses on human health-related activities, or general and administrative expenses,
nor the cost of financing these activities. Separate divisions maintain responsibility for monitoring and managing these costs, including depreciation related to fixed
assets  utilized  by  these  divisions  and,  therefore,  they  are  not  included  in  segment  profits.  In  addition,  costs  related  to  restructuring  activities,  as  well  as  the
amortization of purchase accounting adjustments are not allocated to segments.

Other profits are primarily comprised of miscellaneous corporate profits, as well as operating profits related to third-party manufacturing sales.

Other unallocated, net includes expenses from corporate and manufacturing cost centers, goodwill and other intangible asset impairment charges, gains
or losses on sales of businesses, expense or income related to changes in the estimated fair value of liabilities for contingent consideration, and other miscellaneous
income or expense items.

134

 
Table of Contents

Equity (income) loss from affiliates and depreciation and amortization included in segment profits is as follows:

Pharmaceutical

Animal Health

All Other

Total

Year Ended December 31, 2020
Included in segment profits:

Equity (income) loss from affiliates
Depreciation and amortization

Year Ended December 31, 2019
Included in segment profits:

Equity (income) loss from affiliates
Depreciation and amortization
Year Ended December 31, 2018
Included in segment profits:

Equity (income) loss from affiliates
Depreciation and amortization

$

$

$

$

$

$

6 
690 

— 
534 

4 
411 

$

$

$

— 
164 

— 
109 

— 
82 

$

— 
1 

—  $
10 

—  $
10 

6 
855 

— 
653 

4 
503 

Property, plant and equipment, net, by geographic area where located is as follows:

December 31
United States
Europe, Middle East and Africa
Asia Pacific (other than China and Japan)
Latin America
China
Japan
Other

2020

2019

2018

$

$

10,526  $
6,059 
761 
252 
217 
166 
5 
17,986  $

8,974  $
4,767 
714 
266 
174 
152 
6 
15,053  $

8,306 
3,706 
684 
264 
167 
159 
5 
13,291 

The Company does not disaggregate assets on a products and services basis for internal management reporting and, therefore, such information is not

presented.

135

  
  
  
  
  
  
  
  
  
 
Table of Contents

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of Merck & Co., Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting
We have audited the accompanying consolidated balance sheet of Merck & Co., Inc. and its subsidiaries (the “Company”) as of December 31, 2020 and 2019, and
the related consolidated statements of income, of comprehensive income, of equity and of cash flows for each of the three years in the period ended December 31,
2020, including the related notes (collectively referred to as the “consolidated financial statements”). We also have audited the Company’s internal control over
financial reporting as of December 31, 2020, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of
Sponsoring Organizations of the Treadway Commission (COSO).
In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December
31, 2020 and 2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2020 in conformity with
accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal
control over financial reporting as of December 31, 2020, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.

Basis for Opinions
The Company’s management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for
its assessment of the effectiveness of internal control over financial reporting, included in Management’s Report on Internal Control Over Financial Reporting
appearing under Item 9A. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company’s internal control over
financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States)
(PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and
regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable
assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal
control over financial reporting was maintained in all material respects.
Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial
statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence
regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant
estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial
reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and
evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we
considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the
preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial
reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions
and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial
statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with
authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized
acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

136

Table of Contents

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

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

Customer Discount Accruals in the U.S. - Medicaid, Managed Care and Medicare Part D Rebates
As described in Note 2 to the consolidated financial statements, the Company records certain variable consideration including discounts, which are estimated at the
time of sale generally using the expected value method. Amounts accrued for aggregate customer discounts as of December 31, 2020 in the U.S. are $3.1 billion
and are evaluated on a quarterly basis through comparison of information provided by the wholesalers, health maintenance organizations, pharmacy benefit
managers, federal and state agencies, and other customers to the amounts accrued. Certain of these discounts take the form of rebates, which are amounts owed
based upon definitive contractual agreements or legal requirements with private sector (Managed Care) and public sector (Medicaid and Medicare Part D) benefit
providers, after the final dispensing of the product by a pharmacy to a benefit plan participant. The provision for rebates is based on expected patient usage, as well
as inventory levels in the distribution channel to determine the contractual obligation to the benefit providers. Management uses historical customer segment
utilization mix, sales forecasts, changes to product mix and price, inventory levels in the distribution channel, government pricing calculations and prior payment
history in order to estimate the expected provision.
The principal considerations for our determination that performing procedures relating to customer discount accruals in the U.S. - Medicaid, Managed Care, and
Medicare Part D rebates is a critical audit matter are the significant judgment by management due to the significant measurement uncertainty involved in
developing the provisions, as the provisions include assumptions related to changes to price and historical customer segment utilization mix, pertaining to
forecasted customer claims that may not be fully paid until a subsequent period. This in turn led to a high degree of auditor judgment, subjectivity and effort in
applying the procedures related to those assumptions and in evaluating the evidence obtained from these procedures.
Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial
statements. These procedures included testing the effectiveness of controls relating to customer discount accruals in the U.S. - Medicaid, Managed Care, and
Medicare Part D rebates, including management’s controls over the assumptions used to estimate the corresponding rebate accruals. These procedures also
included, among others, (i) developing an independent estimate of the rebate accruals by utilizing third party data on historical customer segment utilization mix in
the U.S., changes to price, the terms of the specific rebate programs, and the historical trend of actual rebate claims paid, (ii) comparing the independent estimate to
the rebate accruals recorded by management and (iii) testing actual rebate claims paid, including evaluating those claims for consistency with the contractual terms
of the Company’s rebate agreements.

PricewaterhouseCoopers LLP
Florham Park, New Jersey
February 25, 2021
We have served as the Company’s auditor since 2002.

137

  
Table of Contents

Item 9.     Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

Not applicable.

Item 9A.      Controls and Procedures.

Management of the Company, with the participation of its Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the
Company’s disclosure controls and procedures. Based on their evaluation, as of the end of the period covered by this Form 10-K, the Company’s Chief Executive
Officer and Chief Financial Officer have concluded that the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) or 15d-15(e) under the
Securities Exchange Act of 1934, as amended (the Act)) are effective. For the fourth quarter of 2020, there have been no changes in internal control over financial
reporting that materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rule 13a-15(f)
of  the  Act.  Management  conducted  an  evaluation  of  the  effectiveness  of  internal  control  over  financial  reporting  based  on  the  framework  in  Internal
Control  —  Integrated  Framework issued  in  2013  by  the  Committee  of  Sponsoring  Organizations  of  the  Treadway  Commission.  Based  on  this  evaluation,
management  concluded  that  internal  control  over  financial  reporting  was  effective  as  of  December  31,  2020.  PricewaterhouseCoopers  LLP,  an  independent
registered  public  accounting  firm,  has  performed  its  own  assessment  of  the  effectiveness  of  the  Company’s  internal  control  over  financial  reporting  and  its
attestation report is included in this Form 10-K filing.

Management’s Report

Management’s Responsibility for Financial Statements

Responsibility  for  the  integrity  and  objectivity  of  the  Company’s  financial  statements  rests  with  management.  The  financial  statements  report  on
management’s  stewardship  of  Company  assets.  These  statements  are  prepared  in  conformity  with  generally  accepted  accounting  principles  and,  accordingly,
include amounts that are based on management’s best estimates and judgments. Nonfinancial information included in the Annual Report on Form 10-K has also
been prepared by management and is consistent with the financial statements.

To  assure  that  financial  information  is  reliable  and  assets  are  safeguarded,  management  maintains  an  effective  system  of  internal  controls  and
procedures, important elements of which include: careful selection, training and development of operating and financial managers; an organization that provides
appropriate division of responsibility; and communications aimed at assuring that Company policies and procedures are understood throughout the organization. A
staff of internal auditors regularly monitors the adequacy and application of internal controls on a worldwide basis.

To  ensure  that  personnel  continue  to  understand  the  system  of  internal  controls  and  procedures,  and  policies  concerning  good  and  prudent  business
practices, annually all employees of the Company are required to complete Code of Conduct training. This training reinforces the importance and understanding of
internal controls by reviewing key corporate policies, procedures and systems. In addition, the Company has compliance programs, including an ethical business
practices program to reinforce the Company’s long-standing commitment to high ethical standards in the conduct of its business.

The  financial  statements  and  other  financial  information  included  in  the  Annual  Report  on  Form  10-K  fairly  present,  in  all  material  respects,  the
Company’s  financial  condition,  results  of  operations  and  cash  flows.  Our  formal  certification  to  the  Securities  and  Exchange  Commission  is  included  in  this
Form 10-K filing.

Management’s Report on Internal Control Over Financial Reporting

Management 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 generally accepted accounting principles in the
United States of America. Management conducted an evaluation of the effectiveness of internal control over financial reporting based on the framework in Internal
Control — Integrated

138

Table of Contents

Framework issued in 2013 by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that
internal control over financial reporting was effective as of December 31, 2020.

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

The effectiveness of the Company’s internal control over financial reporting as of December 31, 2020, has been audited by PricewaterhouseCoopers

LLP, an independent registered public accounting firm, as stated in their report which appears herein.

Kenneth C. Frazier
Chairman, President 
and Chief Executive Officer

Item 9B.    Other Information.

None.

Robert M. Davis
Executive Vice President, Global Services, 
and Chief Financial Officer

139

Table of Contents

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

The required  information  on directors  and nominees  is incorporated  by reference  from  the discussion  under Proposal 1. Election  of Directors  of the
Company’s  Proxy  Statement  for  the  Annual  Meeting  of  Shareholders  to  be  held  May  25,  2021.  Information  on  executive  officers  is  set  forth  in  Part  I  of  this
document on page 44.

The required information on compliance with Section 16(a) of the Securities Exchange Act of 1934, if applicable, is incorporated by reference from the
discussion under the heading “Stock Ownership Information” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 25, 2021.

The Company  has a Code of Conduct  — Our Values and Standards applicable to all employees, including the principal executive officer, principal
financial  officer,  principal  accounting  officer  and  Controller.  The  Code  of  Conduct  is  available  on  the  Company’s  website  at  www.merck.com/company-
overview/culture-and-values/code-of-conduct/values-and-standards.  The  Company  intends  to  disclose  future  amendments  to  certain  provisions  of  the  Code  of
Conduct, and waivers of the Code of Conduct granted to executive officers and directors, if any, on the website within four business days following the date of any
amendment or waiver. Every Merck employee is responsible for adhering to business practices that are in accordance with the law and with ethical principles that
reflect the highest standards of corporate and individual behavior.

The required information on the identification of the audit committee and the audit committee financial expert is incorporated by reference from the
discussion under the heading “Board Meetings and Committees” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 25,
2021.

Item 11. Executive Compensation.

The information required on executive compensation is incorporated by reference from the discussion under the headings “Compensation Discussion
and  Analysis,”  “Summary  Compensation  Table,”  “All  Other  Compensation”  table,  “Grants  of  Plan-Based  Awards”  table,  “Outstanding  Equity  Awards”  table,
“Option Exercises and Stock Vested” table, “Pension Benefits” table, “Nonqualified Deferred Compensation” table, “Potential Payments Upon Termination or a
Change in Control”, including the discussion under the subheadings “Separation” and “Change in Control,” as well as all footnote information to the various tables,
of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 25, 2021.

The required information on director compensation is incorporated by reference from the discussion under the heading “Director Compensation” and
related  “2020  Schedule  of  Director  Fees”  table  and  “2020  Director  Compensation”  table  of  the  Company’s  Proxy  Statement  for  the  Annual  Meeting  of
Shareholders to be held May 25, 2021.

The  required  information  under  the  headings  “Compensation  and  Benefits  Committee  Interlocks  and  Insider  Participation”  and  “Compensation  and

Benefits Committee Report” is incorporated by reference from the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 25, 2021.

140

 
Table of Contents

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

Information with respect to security ownership of certain beneficial owners and management is incorporated by reference from the discussion under the

heading “Stock Ownership Information” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 25, 2021.

Equity Compensation Plan Information

The  following  table  summarizes  information  about  the  options,  warrants  and  rights  and  other  equity  compensation  under  the  Company’s  equity
compensation plans as of the close of business on December 31, 2020. The table does not include information about tax qualified plans such as the Merck U.S.
Savings Plan.

Plan Category
Equity compensation plans approved by security holders
Equity compensation plans not approved by security holders
Total

(1)

Number of 
securities to be 
issued upon 
exercise of 
outstanding 
options, warrants 
and rights 
(a)

Weighted-average 
exercise price of 
outstanding 
options, warrants 
and rights 
(b)

Number of 
securities remaining 
available for future 
issuance under equity 
compensation plans 
(excluding 
securities 
reflected in column (a)) 
(c)

19,446,307

(2)

— 
19,446,307 

$

$

63.64 
— 
63.64 

100,353,680 
— 
100,353,680 

(1)

(2)

Includes options to purchase shares of Company Common Stock and other rights under the following shareholder-approved plans: the Merck & Co., Inc. 2010 and 2019 Incentive Stock
Plans, and the Merck & Co., Inc. 2010 Non-Employee Directors Stock Option Plan.
Excludes approximately 11,914,491 shares of restricted stock units and 2,099,739 performance share units (assuming maximum payouts) under the Merck Sharp & Dohme 2010 and 2019
Incentive Stock Plans. Also excludes 193,746 shares of phantom stock deferred under the MSD Employee Deferral Program and 564,209 shares of phantom stock deferred under the Merck
& Co., Inc. Plan for Deferred Payment of Directors’ Compensation.

Item 13.

Certain Relationships and Related Transactions, and Director Independence.

The  required  information  on  transactions  with  related  persons  is  incorporated  by  reference  from  the  discussion  under  the  heading  “Related  Person

Transactions” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 25, 2021.

The required information on director independence is incorporated by reference from the discussion under the heading “Independence of Directors” of

the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 25, 2021.

Item 14. Principal Accountant Fees and Services.

The information required for this item is incorporated by reference from the discussion under Proposal 3. Ratification of Appointment of Independent
Registered Public Accounting Firm for 2021 beginning with the caption “Pre-Approval Policy for Services of Independent Registered Public Accounting Firm”
through  “Fees  for  Services  Provided  by  the  Independent  Registered  Public  Accounting  Firm”  of  the  Company’s  Proxy  Statement  for  the  Annual  Meeting  of
Shareholders to be held May 25, 2021.

141

Table of Contents

Item 15. Exhibits and Financial Statement Schedules.

(a)    The following documents are filed as part of this Form 10-K

1.    Financial Statements

PART IV

Consolidated statement of income for the years ended December 31, 2020, 2019 and 2018

Consolidated statement of comprehensive income for the years ended December 31, 2020, 2019 and 2018

Consolidated balance sheet as of December 31, 2020 and 2019

Consolidated statement of equity for the years ended December 31, 2020, 2019 and 2018

Consolidated statement of cash flows for the years ended December 31, 2020, 2019 and 2018

Notes to consolidated financial statements

Report of PricewaterhouseCoopers LLP, independent registered public accounting firm

2.    Financial Statement Schedules

Schedules are omitted because they are either not required or not applicable.

Financial statements of affiliates carried on the equity basis have been omitted because, considered individually or in the aggregate, such affiliates do

not constitute a significant subsidiary.

142

 
Table of Contents

Exhibit
Number
3.1

3.2

4.1

4.2

4.3

4.4

4.5

4.6

4.7

3.    Exhibits

Description

— Restated Certificate of Incorporation of Merck & Co., Inc. (November 3, 2009) — Incorporated by reference to Merck & Co., Inc.’s

Current Report on Form 8-K filed November 4, 2009 (No. 1-6571)

— By-Laws of Merck & Co., Inc. (effective July 22, 2015) — Incorporated by reference to Merck & Co., Inc.’s Current Report on Form 8-

K filed July 28, 2015 (No. 1-6571)

— Indenture, dated as of April 1, 1991, between Merck Sharp & Dohme Corp. (f/k/a Schering Corporation) and U.S. Bank Trust National
Association  (as  successor  to  Morgan  Guaranty  Trust  Company  of  New  York),  as  Trustee  (the  1991  Indenture)  —  Incorporated  by
reference to Exhibit 4 to MSD’s Registration Statement on Form S-3 (No. 33-39349)

— First Supplemental Indenture to the 1991 Indenture, dated as of October 1, 1997 — Incorporated by reference to Exhibit 4(b) to MSD’s

Registration Statement on Form S-3 filed September 25, 1997 (No. 333-36383)

— Second Supplemental Indenture to the 1991 Indenture, dated November 3, 2009 — Incorporated by reference to Exhibit 4.3 to Merck &

Co., Inc.’s Current Report on Form 8-K filed November 4, 2009 (No.1-6571)

— Third Supplemental Indenture to the 1991 Indenture, dated May 1, 2012 — Incorporated by reference to Exhibit 4.1 to Merck & Co.,

Inc.’s Form 10-Q Quarterly Report for the period ended March 31, 2012 (No. 1-6571)

— Indenture, dated November 26, 2003, between Merck & Co., Inc. (f/k/a Schering-Plough Corporation) and The Bank of New York as
Trustee  (the  2003  Indenture)  —  Incorporated  by  reference  to  Exhibit  4.1  to  Schering-Plough’s  Current  Report  on  Form  8‑K  filed
November 28, 2003 (No. 1-6571)

— Second  Supplemental  Indenture  to  the  2003  Indenture  (including  Form  of  Note),  dated  November  26,  2003  —  Incorporated  by

reference to Exhibit 4.3 to Schering-Plough’s Current Report on Form 8‑K filed November 28, 2003 (No. 1-6571)

— Third Supplemental Indenture to the 2003 Indenture (including Form of Note), dated September 17, 2007 — Incorporated by reference

to Exhibit 4.1 to Schering-Plough’s Current Report on Form 8‑K filed September 17, 2007 (No. 1-6571)

143

 
Table of Contents

Exhibit
Number
4.8

4.9

4.10
4.11
4.12
*10.1

*10.2

*10.3

*10.4

*10.5

*10.6

*10.7

*10.8

*10.9

Description

— Fifth Supplemental Indenture to the 2003 Indenture, dated November 3, 2009 — Incorporated by reference to Exhibit 4.4 to Merck &

Co., Inc.’s Current Report on Form 8-K filed November 4, 2009 (No. 1-6571)

— Indenture,

 dated  as  of  January  6,

 as
Trustee — Incorporated by reference to Exhibit 4.1 to Merck & Co., Inc.’s Current Report on Form 8-K filed December 10, 2010 (No.
1-6571)

 Bank  Trust  National  Association,

 between  Merck  &  Co.,

 and  U.S.

 2010,

 Inc.

— Description of the Registrant’s Common Stock
— Description of the Registrant’s 1.125% Notes due 2021, 1.875% Notes due 2026, and 2.500% Notes due 2034
— Description of the Registrant’s 0.500% Notes due 2024 and 1.375% Notes due 2036
— Merck & Co., Inc. Executive Incentive Plan (as amended and restated effective June 1, 2015) — Incorporated by reference to Merck &

Co., Inc.’s Schedule 14A filed April 13, 2015 (No. 1-6571)

— Merck & Co., Inc. Deferral Program Including the Base Salary Deferral Plan (Amended and Restated effective December 1, 2019) -
Incorporated  by reference  to Exhibit 10.2 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December  31,
2019 filed February 26, 2020 (No. 1-6571)

— Merck & Co., Inc. 2010 Incentive Stock Plan (as amended and restated June 1, 2015) — Incorporated by reference to Merck & Co.,

Inc.’s Schedule 14A filed April 13, 2015 (No. 1-6571)

— Form of stock option terms for 2011 quarterly and annual non-qualified option grants under the Merck & Co., Inc. 2010 Incentive Stock
Plan — Incorporated by reference to Exhibit 10.2 to Merck & Co., Inc.’s Form 10‑Q Quarterly Report for the period ended March 31,
2011 filed May 9, 2011 (No. 1-6571)

— Form of stock option terms for 2012 quarterly and annual non-qualified option grants under the Merck & Co., Inc. 2010 Incentive Stock
Plan  —  Incorporated  by  reference  to  Exhibit  10.20  to  Merck  &  Co.,  Inc.’s  Form  10‑K  Annual  Report  for  the  fiscal  year  ended
December 31, 2011 filed February 28, 2012 (No. 1-6571)

— Form of stock option terms for 2013 quarterly and annual non-qualified option grants under the Merck & Co., Inc. 2010 Incentive Stock
Plan  —  Incorporated  by  reference  to  Exhibit  10.19  to  Merck  &  Co.,  Inc.’s  Form  10-K  Annual  Report  for  the  fiscal  year  ended
December 31, 2012 filed February 28, 2013 (No. 1-6571)

— Form of stock option terms for 2014 quarterly and annual non-qualified option grants under the Merck & Co., Inc. 2010 Incentive Stock
Plan  —  Incorporated  by  reference  to  Exhibit  10.18  to  Merck  &  Co.,  Inc.’s  Form  10-K  Annual  Report  for  the  fiscal  year  ended
December 31, 2014 filed February 27, 2015 (No. 1-6571)

— Form of stock option terms for 2015 quarterly and annual non-qualified option grants under the Merck & Co., Inc. 2010 Incentive Stock
Plan  —  Incorporated  by  reference  to  Exhibit  10.20  to  Merck  &  Co.,  Inc.’s  Form  10-K  Annual  Report  for  the  fiscal  year  ended
December 31, 2015 filed February 26, 2016 (No. 1-6571)

— Form of stock option terms for 2018 quarterly and annual non-qualified option grants under the Merck & Co., Inc. 2010 Incentive Stock
Plan — Incorporated by referent to Exhibit 10.12 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December
31, 2017 filed February 27, 2018 (No. 1-6571)

144

 
Table of Contents

Exhibit
Number
*10.10

*10.11

*10.12

*10.13

*10.14

*10.15

*10.16

*10.17

*10.18

10.19

10.20

10.21

10.22

*10.23
*10.24
21
23
24.1
24.2

Description

— Form  of  stock  option  terms  for  2016  quarterly  and  annual  non-qualified  option  grants  under  the  Merck  &  Co.,  Inc.  2010  Incentive
Stock Plan — Incorporated by reference to Exhibit 10.19 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended
December 31, 2016 filed February 28, 2017 (No. 1-6571)

— Form of restricted stock unit terms for 2018 quarterly and annual grants under the Merck & Co., Inc. 2010 Incentive Stock Plan —
Incorporated by reference to Exhibit 10.17 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31,
2017 filed on February 28, 2018 (No. 1-6571)

— 2018 Performance Share Unit Award Terms under the Merck & Co., Inc. 2010 Stock Incentive Plan — Incorporated by reference to
Exhibit 10 to Merck & Co., Inc.’s Current Report on Form 10-Q Quarterly Report for the period ended March 31, 2018 filed May 8,
2018 (No. 1-6571)

— Merck & Co., Inc. 2019 Incentive Stock Plan - Incorporated by reference to Appendix C to Merck & Co., Inc.’s Schedule 14A filed

April 8, 2019 (No. 1-6571)

— Merck  &  Co.,  Inc.  Change  in  Control  Separation  Benefits  Plan  (effective  as  amended  and  restated,  as  of  January  1,
2013) — Incorporated by reference to Exhibit 10.1 to Merck & Co., Inc.’s Current Report on Form 8‑K filed November 29, 2012 (No.
1-6571)

— Merck & Co., Inc. U.S. Separation Benefits Plan (amended and restated as of January 1, 2019) - Incorporated by reference to Exhibit
10.19 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2018 filed February 27, 2019 (No. 1-
6571)

— Merck & Co., Inc. 2010 Non-Employee Directors Stock Option Plan (amended and restated as of December 1, 2010) — Incorporated
by reference  to  Exhibit  10.17 to  Merck  &  Co.,  Inc.’s  Form  10‑K Annual  Report  for  the  fiscal  year  ended  December  31,  2010  filed
February 28, 2011 (No. 1-6571)

— Retirement Plan for the Directors of Merck & Co., Inc. (amended and restated June 21, 1996) —Incorporated by reference to Exhibit

10.C to MSD’s Form 10-Q Quarterly Report for the period ended June 30, 1996 filed August 13, 1996 (No. 1-3305)

— Merck & Co., Inc. Plan for Deferred Payment of Directors’ Compensation (Amended and Restated effective as of January 1, 2020) -
Incorporated by reference to Exhibit 10.18 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31,
2019 filed February 26, 2020 (No. 1-6571)

— Distribution agreement between Schering-Plough and Centocor, Inc., dated April 3, 1998 — Incorporated by reference to Exhibit 10(u)

to Schering-Plough’s Amended 10-K for the year ended December 31, 2003 filed May 3, 2004 (No. 1-6571)†

— Amendment  Agreement  to  the  Distribution  Agreement  between  Centocor,  Inc.,  CAN  Development,  LLC,  and  Schering-Plough
(Ireland) Company — Incorporated by reference to Exhibit 10.1 to Schering-Plough’s Current Report on Form 8-K filed December 21,
2007 (No. 1-6571)†

— Severance  Agreement  and  General  Release  between  Merck  &  Co.,  Inc.  and  Adam  H.  Schechter,  dated  December  1,  2018  -
Incorporated by reference to Exhibit 10.27 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31,
2018 filed February 27, 2019 (No. 1-6571)

— Offer Letter between Merck & Co., Inc. and Jennifer Zachary, dated March 16, 2018 - Incorporated by reference to Exhibit 10.28 to
Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2018 filed February 27, 2019 (No. 1-6571)

— Form of stock option terms for 2021 annual non-qualified option grants under the Merck & Co., Inc. 2019 Incentive Stock Plan.
— Form of restricted stock unit terms for 2021 annual grants under the Merck & Co., Inc. 2019 Incentive Stock Plan.
— Subsidiaries of Merck & Co., Inc.
— Consent of Independent Registered Public Accounting Firm
— Power of Attorney
— Certified Resolution of Board of Directors

145

 
Table of Contents

31.1
31.2
32.1
32.2

Exhibit
Number
101.INS

101.SCH
101.CAL
101.DEF
101.LAB
101.PRE
104

— Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer
— Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer
— Section 1350 Certification of Chief Executive Officer
— Section 1350 Certification of Chief Financial Officer

Description

— 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.

— XBRL Taxonomy Extension Schema Document.
— XBRL Taxonomy Extension Calculation Linkbase Document.
— XBRL Taxonomy Extension Definition Linkbase Document.
— XBRL Taxonomy Extension Label Linkbase Document.
— XBRL Taxonomy Extension Presentation Linkbase Document.
— Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

*
†

Management contract or compensatory plan or arrangement.
Certain portions of the exhibit have been omitted pursuant to a request for confidential treatment. The non-public information has been filed separately with the Securities and Exchange
Commission pursuant to rule 24b-2 under the Securities Exchange Act of 1934, as amended.
Long-term debt instruments under which the total amount of securities authorized does not exceed 10% of Merck & Co., Inc.’s total consolidated assets are not filed as exhibits to this
report. Merck & Co., Inc. will furnish a copy of these agreements to the Securities and Exchange Commission on request.

Item 16.    Form 10-K Summary

Not applicable.

146

                
Table of Contents

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

SIGNATURES

behalf by the undersigned, thereunto duly authorized.

Dated:    February 25, 2021

MERCK & CO., INC.

By:

KENNETH C. FRAZIER
(Chairman, President and Chief Executive Officer)

By:

/s/ JENNIFER ZACHARY
Jennifer Zachary
(Attorney-in-Fact)

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.

Signatures

Title

Date

KENNETH C. FRAZIER

ROBERT M. DAVIS

RITA A. KARACHUN

LESLIE A. BRUN
THOMAS R. CECH
MARY ELLEN COE
PAMELA J. CRAIG
THOMAS H. GLOCER
RISA J. LAVIZZO-MOUREY
PAUL B. ROTHMAN
PATRICIA F. RUSSO
CHRISTINE E. SEIDMAN
INGE G. THULIN
KATHY J. WARDEN
PETER C. WENDELL

Chairman, President and Chief Executive Officer;

Principal Executive Officer; Director

Executive Vice President, Global Services, and Chief Financial Officer;
Principal Financial Officer
Senior Vice President Finance-Global Controller;

Principal Accounting Officer

Director
Director
Director
Director
Director
Director
Director
Director
Director
Director
Director
Director

February 25, 2021

February 25, 2021

February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021
February 25, 2021

Jennifer Zachary, by signing her name hereto, does hereby sign this document pursuant to powers of attorney duly executed by the persons named, filed
with the Securities and Exchange Commission as an exhibit to this document, on behalf of such persons, all in the capacities and on the date stated, such persons
including a majority of the directors of the Company.

By:

/S/ JENNIFER ZACHARY
Jennifer Zachary
(Attorney-in-Fact)

147

 
 
Description of the Registrant’s Common Stock

Exhibit 4.10

Registered under Section 12 of the Securities Exchange Act of 1934

The following sets forth a description of the material terms of the common stock of Merck & Co., Inc. (“Merck”). The description is qualified in its

entirety by reference to Merck’s certificate of incorporation and by-laws, copies of which are included or incorporated by reference as exhibits to Merck’s most
recently filed Annual Report on Form 10-K. You are encouraged to read Merck’s certificate of incorporation and by-laws and the applicable provisions of the New
Jersey Business Corporation Act for additional information.

Under its certificate of incorporation, Merck is authorized to issue an aggregate of 6,520,000,000 shares of capital stock, divided into classes as follows:

•

•

6,500,000,000 shares of common stock, par value $0.50 per share; and

20,000,000 shares of preferred stock, par value $1.00 per share, issuable in one or more series.

Subject to the preferences, qualifications, limitations, voting and other rights and restrictions with respect to each class of Merck’s capital stock having
any preference or priority over Merck’s common stock, the holders of the common stock shall have and possess all rights appertaining to Merck’s capital stock.
The holders of shares of Merck’s common stock are entitled to one vote per share for each share held of record on all matters voted on by shareholders, including
the election of directors.

A majority of votes cast by shares of Merck’s common stock entitled to vote is required for:

•

•

•

•

•

adoption of a proposed amendment to the certificate of incorporation;

approval of a proposed plan of merger or consolidation;

approval of a sale, lease, exchange or other disposition of all, or substantially all, of Merck’s assets, not in the usual and regular course of business;

approval of a proposed plan of exchange; and

approval of a proposed plan of dissolution.

In addition, unless approved by the affirmative vote of holders of at least two-thirds of the shares of Merck’s common stock voted thereon by disinterested

shareholders, Merck is generally prohibited from purchasing shares of Merck’s common stock at a price in excess of a fair market price from a person known to
Merck to be the beneficial owner of more than 5% of the voting power of the then outstanding shares of Merck’s common stock, subject to exceptions for certain
open market transactions, certain public transactions, purchases pursuant to an offer to purchase made on the same terms and conditions to all holders of Merck’s
common stock and shares held by such a beneficial owner for longer than two years.

Holders of Merck’s common stock are entitled to participate equally in dividends when and as such dividends may be declared by Merck’s board of
directors out of funds legally available therefor. As a New Jersey corporation, Merck is subject to statutory limitations on the declaration and payment of dividends.
In the event of Merck’s liquidation, dissolution or winding up, holders of Merck’s common stock have the right to a ratable portion of assets remaining after
satisfaction in full of the prior rights of creditors, including holders of Merck’s indebtedness, all liabilities and the aggregate liquidation preferences of any
outstanding shares of Merck’s preferred stock. The holders of Merck’s common stock have no conversion, redemption, preemptive or cumulative voting rights. All
of the shares of Merck’s common stock issued by Merck are validly issued, fully paid and non-assessable.

The transfer agent and registrar for Merck’s common stock is Equinity Trust Company.

Takeover Defense

Certain provisions of Merck’s certificate of incorporation and by-laws and of the New Jersey Business Corporation Act (the “NJBCA”) may have anti-
takeover effects and could delay, defer or prevent a tender offer or takeover attempt that a shareholder might consider to be in such shareholder’s best interests,
including attempts that might result in a premium over the market price for the shares held by shareholders, and may make removal of the incumbent management
and directors more difficult.

Authorized Shares; Undesignated Preferred Stock. Merck’s certificate of incorporation authorizes the issuance of up to 6,500,000,000 shares of common

stock and 20,000,000 shares of preferred stock. These additional authorized shares may be used by Merck’s board of directors, to the extent consistent with its
fiduciary duty, to deter future attempts to gain control of Merck, and may discourage attempts by others to attempt to acquire control of Merck without negotiation
with Merck’s board of directors.

Merck’s board of directors has the sole authority, subject to the rights of any outstanding series of Merck’s preferred stock, to fix the numbers,
designations, rights, preferences and limitations of any one or more series of preferred stock, including with respect to voting, dividends, conversion, redemption
and liquidation preferences. As a result of the ability to fix voting rights for a series of preferred stock, Merck’s board of directors has the power, to the extent
consistent with its fiduciary duty, to issue a series of preferred stock to persons friendly to management in order to attempt to block a tender offer, merger or other
transaction by which a third party seeks control of Merck, and thereby assist members of management to retain their positions.

No Shareholder Action by Written Consent. Merck’s certificate of incorporation provides that shareholders may not act by written consent. Any

shareholder action must be taken at a duly called annual or special meeting.

Special Meetings of Shareholders. In addition to what is provided by the NJBCA, a special meeting may be called at any time by Merck’s board of

directors and, subject to the rights of the holders of any class or series of preferred stock then outstanding, generally may be called at any time upon the written
request, in the form prescribed in Merck’s by-laws, of the holders of record of at least 15% or more of the capital stock entitled to vote in the election of directors.

Notification of Proposed Business and Nominations for Annual Meetings. Merck’s by-laws require that written notice of any shareholder proposal for

business at an annual meeting of shareholders, or any shareholder director nomination for an annual meeting of shareholders, be received at least 120 days but no
more than 150 days prior to the anniversary date of the preceding year’s annual meeting; provided, however, in the event that the date of the annual meeting is
more than 30 days earlier or later than the anniversary date of the most recent annual meeting of shareholders, the shareholders’ notice must be so delivered not
later than the close of business on the later of (i) the 120th day prior to such annual meeting of shareholders or (ii) the 10th day following the day on which a public
announcement of the annual meeting date is first made. Also, Merck’s by-laws allow a shareholder or a group of no more than 20 shareholders, who or which has
maintained continuous qualifying ownership of at least 3% of Merck’s outstanding common stock for at least three years and has complied with the other
requirements set forth in the by-laws, to include director nominees constituting up to 20% of the board of directors in Merck’s proxy materials for an annual
meeting of shareholders. A request to include such a nominee must be received at least 120 days but no more than 150 days prior to the anniversary of the date
Merck commenced mailing of its proxy materials in connection with the most recent annual meeting of shareholders.

No Cumulative Voting. Merck’s certificate of incorporation does not permit cumulative voting in the election of directors.

Business Combinations with Interested Shareholder. The NJBCA provides that no corporation organized under the laws of New Jersey (a “resident

domestic corporation”) may engage in any “business combination” (as defined in the NJBCA) with any interested shareholder (generally a 10% or greater
shareholder) of such corporation

2

for a period of five years following such interested shareholder’s stock acquisition, unless either (i) such stock acquisition is approved by the board of directors of
such corporation prior to the stock acquisition and any subsequent business combinations with the interested shareholder are approved by (A) members of the board
of directors independent of the interested shareholder and (B) the holders of a majority of the voting stock not beneficially owned by the interested shareholder or
(ii) such business combination is approved by the board of directors of such corporation prior to the stock acquisition.

In addition, no resident domestic corporation may engage, at any time, in any business combination with any interested shareholder of such corporation

other than: (i) a business combination approved by the board of directors prior to the stock acquisition, (ii) a business combination approved by the affirmative vote
of the holders of two-thirds of the voting stock not beneficially owned by such interested shareholder at a meeting called for such purpose, (iii) a business
combination in which the interested shareholder pays a formula price designed to ensure that all other shareholders receive at least the highest price per share paid
by such interested shareholder or (iv) a business combination approved (A) by the board of directors independent of the interested shareholder prior to the
consummation of the business combination and (B) the holders of a majority of the voting stock not beneficially owned by the interested shareholder at a meeting
called for such purpose if the interested shareholder’s stock acquisition was approved by the board of directors prior to the consummation of such stock acquisition.

Board of Directors. Merck’s certificate of incorporation provides that, subject to the rights of the holders of shares of any series of preferred stock then

outstanding, the number of directors composing Merck’s board of directors will not exceed eighteen, and that a director can only be removed by shareholder vote if
there is cause for the director’s removal. A majority of the directors then constituting Merck’s board of directors are authorized to fill vacancies on the board of
directors, whether created by removal for cause, resignation or otherwise.

3

Description of the Registrant’s 1.125% Notes due 2021, 1.875% Notes due 2026 and 2.500% Notes due 2034

Exhibit 4.11

Registered under Section 12 of the Securities Exchange Act of 1934

In this description, unless the context requires otherwise:

•

•

•

•

•

•

“2021 notes” means the 1.125% Notes due 2021 of Merck & Co., Inc.;

“2026 notes” means the 1.875% Notes due 2026 of Merck & Co., Inc.;

“2034 notes” means the 2.500% Notes due 2034 of Merck & Co., Inc.;

“holder” means a direct holder and not a street name or other indirect holder of notes;

 “notes” means the 2021 notes, 2026 notes and 2034 notes, collectively; and

“we,” “our” and “us” refer to Merck & Co., Inc., but not to any of Merck & Co., Inc.’s subsidiaries.

The following sets forth a description of the material terms of the notes. The description is qualified in its entirety by reference to the indenture, dated as

of January 6, 2010, between us and U.S. Bank Trust National Association, as trustee (a copy of which is included as Exhibit 4.1 to our Current Report on Form 8-K
filed on December 10, 2010) and, as applicable, the officers’ certificate pursuant to such indenture with respect to the 2021 notes, dated October 15, 2014,
including the form of the 2021 notes (a copy of which is included as Exhibit 4.1 to our Current Report on Form 8-K filed on October 15, 2014), the officers’
certificate pursuant to such indenture with respect to the 2026 notes, dated October 15, 2014, including the form of the 2026 notes (a copy of which is included as
Exhibit 4.2 to our Current Report on Form 8-K filed on October 15, 2014) or the officers’ certificate pursuant to such indenture with respect to the 2034 notes,
dated October 15, 2014, including the form of the 2034 notes (a copy of which is included as Exhibit 4.3 to our Current Report on Form 8-K filed on October 15,
2014). You are encouraged to read such indenture and officers’ certificates for additional information.

The 2021 notes, the 2026 notes and the 2034 notes are each a separate series of notes under the indenture.

The 2021 notes are initially limited to €1,000,000,000 aggregate principal amount, which amount remains outstanding as of February 24, 2021, and will

mature on October 15, 2021. The 2026 notes are initially limited to €1,000,000,000 aggregate principal amount, which amount remains outstanding as of February
24, 2021, and will mature on October 15, 2026. The 2034 notes are initially limited to €500,000,000 aggregate principal amount, which amount remains
outstanding as of February 24, 2021, and will mature on October 15, 2034.

The notes are unsecured and rank equally with all our other unsecured and unsubordinated indebtedness from time to time outstanding. The notes are not

guaranteed by any of our subsidiaries and are therefore structurally subordinated to all liabilities of our subsidiaries from time to time outstanding, including any
guarantees provided by our subsidiaries. The notes also are effectively subordinated to any secured debt we or our subsidiaries incur to the extent of the value of
any assets securing such debt.

The notes were issued in denominations of €100,000 and integral multiples of €1,000 in excess thereof.

We may issue as many distinct series of debt securities under the indenture as we wish. A series of debt securities may be guaranteed by one or more of

our subsidiaries. There is no limit on the amount of debt securities we may issue under the indenture and the provisions of the indenture allow us to issue debt
securities with terms different from those previously issued under the indenture. Also, as discussed below under “—Further Issues,” we may “reopen” a previous
issue of a series of debt securities and issue additional debt securities of that series. We also may issue other debt under other indentures or documentation,
containing provisions different from those included in the indenture or applicable to the notes.

The notes are listed on the New York Stock Exchange. We have no obligation to maintain such listing and we may delist the notes at any time.

The 2021 notes bear interest at a rate of 1.125% per annum, the 2026 notes bear interest at a rate of 1.875% per annum, and the 2034 notes bear interest at

a rate of 2.500% per annum. Interest on the notes is payable annually on October 15 of each year to the person in whose name such notes were registered at the
close of business on the fifteenth calendar day before the next interest payment date. If any payment date for the notes is not a business day, payment is made on
the next business day, but we are not liable for any additional interest as a result of the delay in payment. With respect to the notes, by business day, we mean any
Monday, Tuesday, Wednesday, Thursday or Friday which is not a day when banking institutions are authorized or obligated by law or executive order to be closed
in The City of New York or London and, for any place of payment outside of The City of New York or London, in such place of payment, and on which the Trans-
European Automated Real-time Gross Settlement Express Transfer system (the TARGET2 system), or any successor thereto, operates.

With respect to each series of notes, we compute the amount of interest payable on the basis of (i) the actual number of days in the period for which

interest is being calculated and (ii) the actual number of days from (and including) the last date on which interest was paid on the notes of such series (or October
15, 2014, if no interest has been paid on the notes of such series) to (but excluding) the next scheduled interest payment date. This payment convention is referred
to as ACTUAL/ACTUAL (ICMA) as defined in the rulebook of the International Capital Market Association.

Elavon Financial Services DAC, UK Branch initially acts as principal paying agent and transfer agent for the notes (the “paying agent”). Elavon Financial
Services DAC initially acts as security registrar (the “security registrar”) and U.S. Bank Trust National Association initially acts as trustee (“trustee”) for the notes.
We have entered into an issuing and paying agency agreement in relation to the notes between us, U.S. Bank Trust National Association, as trustee, Elavon
Financial Services Limited, UK Branch, as principal paying agent and transfer agent and Elavon Financial Services Limited as security registrar. Payment of
principal of and interest on the notes is made through the office of the principal paying agent in London. The terms “principal paying agent” and “paying agent”
shall include any successors appointed from time to time in accordance with the provisions of the issuing and paying agency agreement, and any reference to an
“agent” or “agents” shall mean any or all (as applicable) of such persons.

Payments in Euros

All payments of interest and principal, including payments made upon any redemption of the notes, are payable in euros. If, at any time, the euro is

unavailable to us due to the imposition of exchange controls or other circumstances beyond our control or if the euro is no longer being used by the then member
states of the European Monetary Union that have adopted the euro as their currency or for the settlement of transactions by public institutions of or within the
international banking community, then all payments in respect of the notes will be made in U.S. dollars until the euro is again available to us or so used. In such
circumstances, the amount payable on any date in euros will be converted into U.S. dollars on the basis of the most recently available market exchange rate for
euros. Any payment in respect of the notes so made in U.S. dollars will not constitute an event of default under the notes or the indenture governing the notes.
Neither the trustee nor the paying agent shall have any responsibility for any calculation or conversion in connection with the foregoing.

Investors are subject to foreign exchange risks as to payments of principal and interest that may have important economic and tax consequences to them.

Optional Redemption

Each series of notes is redeemable in whole or in part, at our option at any time or from time to time, at a redemption price equal to the greater of (i) 100%

of the principal amount of the notes to be redeemed or (ii) the sum of the present values of the Remaining Scheduled Payments (as defined below) (not including
any portion of such payment of interest accrued as of the date of redemption) discounted to the redemption date on an annual basis

2

(ACTUAL/ACTUAL (ICMA)) at the applicable Comparable Government Bond Rate (as defined below), plus 15 basis points with respect to the 2021 notes, the
Comparable Government Bond Rate plus 15 basis points with respect to the 2026 notes and the Comparable Government Bond Rate plus 15 basis points with
respect to the 2034 notes, plus, in each case, accrued and unpaid interest on the principal amount being redeemed to, but excluding, the redemption date.

On or after July 15, 2021 for the 2021 notes, July 15, 2026 for the 2026 notes and July 15, 2034 for the 2034 notes (three months prior to the maturity date

of the 2021 notes, the 2026 notes or the 2034 notes, as applicable), we may redeem in whole or in part the 2021 notes, the 2026 notes or the 2034 notes, as
applicable, at any time or from time to time, at our option, at a redemption price equal to 100% of the principal amount of the applicable notes being redeemed,
plus accrued and unpaid interest on the principal amount being redeemed to, but excluding, the redemption date.

We are required to give notice of redemption at least 30 days, but no more than 60 days, prior to the redemption date. The notice will be mailed to the
registered address of each holder of that series of notes. The principal amount of a note remaining outstanding after a redemption in part shall be €100,000 or an
integral multiple of €1,000 in excess thereof.

“Comparable Government Bond Rate” means, with respect to any redemption date, the price, expressed as a percentage (rounded to three decimal places,

with 0.0005 being rounded upwards), at which the gross redemption yield on the notes to be redeemed, if they were to be purchased at such price on the third
business day prior to the date fixed for redemption, would be equal to the gross redemption yield on such business day of the Comparable Government Bond (as
defined below) on the basis of the middle market price of the Comparable Government Bond prevailing at 11:00 a.m. (London time) on such business day as
determined by an independent investment bank selected by us.

“Comparable Government Bond” means, in relation to any Comparable Government Bond Rate calculation, at the discretion of an independent
investment bank selected by us, a German federal government bond whose maturity is closest to the maturity of the notes to be redeemed, or if such independent
investment bank in its discretion determines that such similar bond is not in issue, such other German government bond as such independent investment bank may,
with the advice of three brokers of, and/or market makers in, German government bonds selected by us, determine to be appropriate for determining the
Comparable Government Bond Rate.

“Remaining Scheduled Payments” means, with respect to each note to be redeemed, the remaining scheduled payments of principal of and interest on the

note that would be due after the related redemption date but for the redemption. If that redemption date is not an interest payment date with respect to a note, the
amount of the next succeeding scheduled interest payment on the note will be reduced by the amount of interest accrued on the note to the redemption date.

If fewer than all of the notes of any series are to be redeemed, the trustee will select the particular notes or portions thereof for redemption from the

outstanding notes not previously called, pro rata or by lot, or in such other manner as we direct each in accordance with the depositary’s procedures.

Unless we default in payment of the redemption price, on and after the redemption date interest will cease to accrue on the notes or portions thereof called

for redemption.

The notes are also subject to redemption if certain events occur involving United States taxation. See “—Taxation Redemption.”

Additional Amounts

All payments of principal and interest in respect of the notes are made free and clear of, and without deduction or withholding for or on account of any

present or future taxes, duties, assessments or other governmental

3

charges of whatsoever nature imposed, levied, collected, withheld or assessed by the United States or any political subdivision or taxing authority of or in the
United States (collectively, “Taxes”), unless such withholding or deduction is required by law.

In the event such withholding or deduction of Taxes is required by law, subject to the limitations described below, we will pay to the holder of any note

that is not a U.S. Holder (as defined below) such additional amounts (“Additional Amounts”) as may be necessary in order that every net payment received by such
holder of principal of or interest or any other amount payable on the notes (including upon redemption), after deduction or withholding for or on account of such
Taxes, will not be less than the amount provided for in such note to be then due and payable before deduction or withholding for or on account of such Taxes.

However, our obligation to pay Additional Amounts shall not apply to:

(a) any Taxes which would not have been so imposed but for:

(1) the existence of any present or former connection between such holder or beneficial owner (or between a fiduciary, settlor,
beneficiary, member or shareholder or other equity owner of, or a person having a power over, such holder or beneficial owner, if such holder or
beneficial owner is an estate, a trust, a limited liability company, a partnership, a corporation or other entity) and the United States, including,
without limitation, such holder or beneficial owner (or such fiduciary, settlor, beneficiary, member, shareholder or other equity owner or person
having such a power) being or having been a citizen or resident or treated as a resident of the United States or being or having been engaged in a
trade or business in the United States or being or having been present in the United States or having or having had a permanent establishment in
the United States;

(2) the failure of such holder or beneficial owner to comply with any certification, information or other reporting requirement, if

compliance is required under United States tax laws and regulations to establish entitlement to a partial or complete exemption from such Taxes
(including, but not limited to, the requirement to provide Internal Revenue Service Form W-8BEN, Form W-8BEN-E, Form W-8ECI, or any
subsequent versions thereof or successor thereto); or

(3) such holder’s or beneficial owner’s present or former status as a personal holding company or a foreign personal holding company
with respect to the United States, as a controlled foreign corporation with respect to the United States, as a passive foreign investment company
with respect to the United States, as a foreign tax exempt organization with respect to the United States or as a corporation which accumulates
earnings to avoid United States federal income tax;

(b) any Taxes imposed by reason of the holder or beneficial owner:

(1) owning or having owned, directly or indirectly, actually or constructively, 10% or more of the total combined voting power of all

classes of our stock, as described in section 871(h)(3) of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”),

(2) being a bank receiving interest described in section 881(c)(3)(A) of the Internal Revenue Code, or

(3) being a controlled foreign corporation with respect to the United States that is related to us by stock ownership;

(c) any Taxes which would not have been so imposed but for the presentation by the holder or beneficial owner of such note for payment on a date more

than 30 days after the date on which such payment became due and payable or the date on which payment of the note is duly provided for and notice is given to
holders, whichever

4

occurs later, except to the extent that the holder or beneficial owner would have been entitled to such Additional Amounts on presenting such note on any date
during such 30-day period;

(d) any estate, inheritance, gift, sales, excise, transfer, personal property, wealth or similar Taxes;

(e) any Taxes which are payable otherwise than by withholding from a payment on such note;

(f) any Taxes which are payable by a holder that is not the beneficial owner of the note, or a portion of the note, or that is a fiduciary, partnership, limited

liability company or other similar entity, but only to the extent that a beneficial owner, a beneficiary or settlor with respect to such fiduciary or member of such
partnership, limited liability company or similar entity would not have been entitled to the payment of an additional amount had such beneficial owner, settlor,
beneficiary or member received directly its beneficial or distributive share of the payment;

(g) any Taxes required to be withheld by any paying agent from any payment on any note, if such payment can be made without such withholding by at

least one other paying agent;

(h) any Taxes required to be withheld or deducted where such withholding or deduction is imposed pursuant to European Council Directive 2003/48/EC

on the taxation of savings income, or any law implementing or complying with, or introduced in order to conform to, such European Council Directive;

(i) any Taxes imposed under Sections 1471 through 1474 of the Internal Revenue Code (or any amended or successor provisions), any current or future
regulations or official interpretations thereof, any agreement entered into pursuant to Section 1471(b) of the Code or any fiscal or regulatory legislation, rules or
practices adopted pursuant to any intergovernmental agreement entered into in connection with the implementation of such sections of the Code;

(j) any combination of items (a), (b), (c), (d), (e), (f), (g), (h) and (i).

For purposes of this section, the acquisition, ownership, enforcement, or holding of or the receipt of any payment with respect to a note will not constitute

a connection (1) between the holder or beneficial owner and the United States or (2) between a fiduciary, settlor, beneficiary, member or shareholder or other
equity owner of, or a person having a power over, such holder or beneficial owner if such holder or beneficial owner is an estate, a trust, a limited liability
company, a partnership, a corporation or other entity and the United States.

Any reference in this description, in the indenture or in the notes to principal or interest or other payment on the notes shall be deemed to refer also to

Additional Amounts which may be payable under the provisions of this section.

We will pay all stamp and other duties, if any, which may be imposed by the United States or any political subdivision thereof or taxing authority therein

with respect to the issuance of the notes pursuant to this offering.

Except as specifically provided under the heading “—Additional Amounts,” we will not be required to make any payment with respect to any tax, duty,

assessment or other governmental charge imposed by any government or any political subdivision or taxing authority of or in the United States.

In addition, we undertake that, to the extent permitted by law, we will maintain a paying agent in a Member State of the European Union (if any) that will

not require withholding or deduction of tax pursuant to European Council Directive 2003/48/EC on the taxation of savings income or any law implementing or
complying with, or introduced in order to conform to, such European Council Directive.

A “U.S. Holder” is a beneficial owner of a note or notes that is for U.S. federal income tax purposes:

•

an individual who is citizen or resident of the United States;

5

•

•

•

a corporation (or other entity classified as a corporation for these purposes) created or organized in or under the laws of the United States, any state
thereof or the District of Columbia;

an estate, the income of which is subject to U.S. federal income taxation regardless of the source of that income; or

a trust, if (1) a U.S. court is able to exercise primary supervision over the trust’s administration and one or more “United States persons” (within the
meaning of the Internal Revenue Code) has the authority to control all of the trust’s substantial decisions, or (2) the trust has a valid election in effect
under applicable Treasury regulations to be treated as a “United States person.”

Taxation Redemption

The notes may be redeemed at our option, in whole but not in part, at a redemption price equal to 100% of the principal amount of the notes to be

redeemed, together with interest accrued and unpaid to the date fixed for redemption, at any time, on giving not less than 30 nor more than 60 days’ notice in
accordance with “Notices” below if:

(a) we have or will become obligated to pay Additional Amounts as a result of (i) any change in or amendment to the laws, regulations or rulings of the

United States or any political subdivision or any taxing authority of or in the United States affecting taxation, or (ii) any change in or amendment to an official
application, interpretation, administration or enforcement of such laws, regulations or rulings, which change or amendment is announced or becomes effective on
or after October 6, 2014; provided we reasonably determine that such obligation cannot be avoided by our taking reasonable measures available to us without
significant difficulty, cost or expense, or

(b) any action shall have been taken by a taxing authority, or any action has been brought in a court of competent jurisdiction, in the United States or any

political subdivision or taxing authority of or in the United States, including any of those actions specified in (a) above, whether or not such action was taken or
brought with respect to us, or any change, clarification, amendment, application or interpretation of such laws, regulations or rulings shall be officially proposed, in
any such case on or after October 6, 2014, which results in a substantial likelihood that we will be required to pay Additional Amounts on the next interest payment
date.

However, no such notice of redemption shall be given earlier than 90 days prior to the earliest date on which we would be, in the case of a redemption for

the reasons specified in (a) above, or there would be a substantial likelihood that we would be, in the case of a redemption for the reasons specified in (b) above,
obligated to pay such Additional Amounts if a payment in respect of the notes were then due and, at the time such notification of redemption is given, such
circumstance remains in effect.

Prior to the publication of any notice of redemption pursuant to this section, in the case of a redemption for the reasons specified in (a) or (b) above, we

will deliver to the trustee:

(1) a certificate signed by one of our duly authorized officers stating that we are entitled to effect such redemption and setting forth a statement of facts

showing that the conditions precedent to our right so to redeem have occurred, and

(2) a written opinion of independent legal counsel of recognized standing to the effect that we have or will become obligated to pay such Additional

Amounts as a result of such change or amendment or that there is a substantial likelihood that we will be required to pay such Additional Amounts as a result of
such action or proposed change, clarification, amendment, application or interpretation, as the case may be.

Such notice, once delivered by us to the trustee, will be irrevocable.

6

Modification and Waiver

There are three types of changes we can make to the indenture and the notes.

Changes Requiring Holder Approval. First, there are changes that cannot be made to the notes of any series without specific approval by each holder of

the notes of such series affected thereby. Following is a list of those types of changes:

•

•

•

•

•

•

change the payment due date of any installment of the principal or any premium or interest on a note stated in the note;

reduce any amounts due on a note;

change the place or currency of payment on a note;

impair holders’ right to sue for payment;

reduce the percentage of notes of any series, the holders of which must consent to modify or amend the indenture;

reduce the percentage of notes of any series the holders of which must consent to waive compliance with certain provisions of the indenture or to
waive certain defaults; and

• modify any other aspect of the provisions dealing with modification and waiver of the indenture except to increase any such percentage or to provide
that certain other provisions of the indenture cannot be modified or waived without the consent of the holder of each outstanding security affected
thereby.

Changes Requiring a Majority Vote. The second type of change to the indenture and the notes is the kind that requires a vote in favor by holders owning

not less than a majority of the principal amount of the notes of the particular series affected. Most changes fall into this category, such as if we wish to obtain a
waiver of all or part of the restrictive covenants described below, or a waiver of a past default. However, we cannot obtain a waiver of a payment default or any
other aspect of the indenture or the notes listed in the first category above under “—Changes Requiring Holder Approval” unless we obtain the individual consent
of each holder of the notes of such series affected thereby to the waiver.

Changes Not Requiring Approval. The third type of change does not require any vote by holders of notes. This type is limited to the addition or release of

a guarantee, corrections and clarifications and other changes that would not adversely affect holders of the notes.

Further Details Concerning Voting. When taking a vote, we use the U.S. dollar equivalent to decide how much principal amount to attribute to a note.

Notes will not be considered outstanding and therefore will not carry voting rights if we have deposited or set aside in trust for the holders thereof money

for their payment or redemption. Notes will also not be eligible to vote if they have been fully defeased as described under “—Defeasance—Full Defeasance.”

We may set any day as a record date for the purpose of determining the holders of outstanding notes that are entitled to vote or take other action under the

indenture. In some circumstances, the trustee may set a record date for action by holders.

Street name and other indirect holders should consult their banks or brokers for information on how approval may be granted or denied if we seek to

change the indenture or the notes or request a waiver.

7

Mergers and Similar Events

We may consolidate or merge with another company or firm. We may also convey, transfer or lease all of our properties and assets substantially as an

entirety to another firm, or buy or lease substantially all of the assets of another firm. However, we may not take any of these actions unless the following
conditions, among others, are met:

• We are the surviving entity or, when we merge out of existence or convey, transfer or lease all of our properties and assets substantially as an entirety,

the other firm must be a corporation, limited liability company, partnership or trust organized under the laws of a U.S. state or the District of
Columbia or under federal law and it must agree to be legally responsible for the notes.

•

•

The merger, sale of assets or other transaction must not cause a default on the notes, and we must not already be in default unless the merger or other
transaction would cure the default. For purposes of this no-default test, a default would include an event of default, as described under “—Default and
Remedies—Events of Default—What is an Event of Default,” that has occurred and not been cured. A default for this purpose would also include the
occurrence of any event that would be an event of default if we received the required notice of our default or if under the indenture the default would
become an event of default after existing for a specific period of time.

It is possible that the merger, sale of assets or other transaction would cause some of our property to become subject to a mortgage or other legal
mechanism giving lenders preferential rights in that property over other lenders or over our general creditors if we fail to pay them back. We have
promised to limit these preferential rights, as discussed under “—Restrictive Covenants.” If a merger or other transaction would create any liens on
any of our property, we must comply with those restrictive covenants. We would do this either by deciding that the liens were permitted, or by
following the requirements of the restrictive covenants to grant an equivalent or higher-ranking lien to the holders of the notes on the same property
that we own.

If the conditions described above are satisfied with respect to any series of notes, we do not need to obtain the approval of the holders of those notes in
order to merge or consolidate or to sell our assets. Also, these conditions apply only if we wish to merge or consolidate with another entity or convey, transfer or
lease all of our properties and assets substantially as an entirety. We do not need to satisfy these conditions if we enter into other types of transactions, including
any transaction in which we acquire the stock or assets of another entity, any transaction that involves a change of control but in which we do not merge or
consolidate and any transaction in which we convey, transfer or lease less than all of our properties and assets substantially as an entirety. It is possible that these
other types of transactions may result in a reduction in our credit rating, may reduce our operating results or may impair our financial condition. However, the
holders of notes have no approval right with respect to any transaction of this type.

Restrictive Covenants

Restrictions on Secured Debt. Some of our property may be subject to a mortgage or other legal mechanism that gives our lenders preferential rights in
that property over other lenders, including the holders of the notes, or over our general creditors if we fail to pay them back. These preferential rights are called
liens. Debt which is protected by these preferential rights is called secured debt. In the indenture, we promise that neither we nor our domestic subsidiaries (as
defined below) will incur any new secured debt that is secured by a lien on any of our or our domestic subsidiaries’ principal domestic manufacturing properties (as
defined below), or on any shares of stock of any of our domestic subsidiaries that own or lease a principal domestic manufacturing property, unless we grant an
equivalent or higher-ranking lien on the same property to the holders of the notes and other outstanding debt securities issued under the indenture.

We do not need to comply with this restriction if the amount of all debt that would be secured by liens on principal domestic manufacturing properties,

including the new debt, the notes and other outstanding debt securities

8

issued under the indenture which we would so secure as described in the previous sentence, and all attributable debt (as defined below) that results from a sale and
leaseback transaction involving principal domestic manufacturing properties, is less than 10% of our consolidated net tangible assets (as defined below).

This restriction on secured debt does not apply to debt secured by certain types of liens, and we can disregard this secured debt when we calculate the

limits imposed by this restriction. These types of liens are:

•

•

•

•

•

•

•

•

liens on the property of any of our domestic subsidiaries, or on their shares of stock, if those liens existed at the time the corporation became our
domestic subsidiary;

with respect to any series of notes, any lien existing on the date of issuance of such notes;

liens in favor of us or our domestic subsidiaries;

liens in favor of U.S. governmental bodies that we granted in order to assure our payments to such bodies that we owe by law or because of a
contract we entered into;

liens in favor of any customer arising in respect of payments made by or on behalf of a customer for goods produced for, or services rendered to,
customers in the ordinary course of business not exceeding the amount of those payments;

statutory liens, liens for taxes or assessments or governmental charges or levies not yet due or delinquent or which can be paid without penalty or
are being contested in good faith, landlord’s liens on leased property, easements and other liens of a similar nature;

liens on property or shares of stock that existed at the time we acquired them, including property we may acquire through a merger or similar
transaction, or that we granted in order to purchase the property, which are sometimes called purchase money mortgages; and

debt secured by liens that extend, renew or replace any of these types of liens.

We and our subsidiaries may have as much unsecured debt as we may choose.

Restrictions on Sales and Leasebacks. We promise that neither we nor any of our domestic subsidiaries will enter into any sale and leaseback transaction

involving a principal domestic manufacturing property, unless we comply with this restrictive covenant. A sale and leaseback transaction generally is an
arrangement between us or a domestic subsidiary and a bank, insurance company or other lender or investor where we or the domestic subsidiary sell a property to
a lender or investor more than 120 days after the acquisition of the property or the completion of construction of the property and the beginning of its full operation
and we lease the property back from the lender.

We can comply with this restrictive covenant in either of two ways:

•

•

First, we will be in compliance if we or our domestic subsidiary could grant a lien on the principal domestic manufacturing property in an amount
equal to the attributable debt for the sale and leaseback transaction without being required to grant an equivalent or higher-ranking lien to the holders
of the notes and other outstanding debt securities issued under the indenture under the restriction on secured debt described above.

Second, we can comply if we retire an amount of our or any domestic subsidiary’s funded debt which is not subordinated in right of payment to any
outstanding notes or other outstanding debt securities issued under the indenture, within 120 days of the transaction, equal to the greater of the net
proceeds of the sale of the principal domestic manufacturing property that we lease in the transaction or the fair market value of that property, subject
to credits for voluntary retirements of notes and other

9

outstanding debt securities issued under the indenture and funded debt we or the domestic subsidiary may make.

This restriction on sales and leasebacks does not apply to any sale and leaseback transaction that is between us and one of our domestic subsidiaries or

between domestic subsidiaries, or that involves a lease for a period of three years or less.

Definitions Relating to our Restrictive Covenants. Following are summaries of the meanings of the terms that are important in understanding the

restrictive covenants previously described:

“Attributable debt” means the total net amount of rent, discounted at 1% per annum over the weighted average yield to maturity of the outstanding notes

and other outstanding debt securities issued under the indenture compounded semi-annually, that is required to be paid during the remaining term of any lease.

“Consolidated net tangible assets” is the total amount of assets, less reserves and certain other permitted deductible items, after subtracting all current

liabilities and all goodwill, trade names, trademarks, patents, unamortized debt discounts and expenses and similar intangible assets, as such amounts appear on our
most recent consolidated balance sheet and computed in accordance with generally accepted accounting principles.

A “domestic subsidiary” means any of our subsidiaries which transacts substantially all of its business in the United States, has substantially all of its

fixed assets located in the United States, or owns or leases principal domestic manufacturing property. However, a subsidiary whose principal business is financing
our operations outside of the United States is not a domestic subsidiary. A subsidiary is a corporation in which we and/or one or more of our other subsidiaries
owns at least 50% of the voting stock (generally defined as stock that ordinarily permits its owners to vote for the election of directors).

“Funded debt” means all debt for borrowed money that either has a maturity of 12 months or more from the date on which the calculation of funded debt

is made or has a maturity of less than 12 months from that date but is by its terms renewable or extendible beyond 12 months from that date at the option of the
borrower.

A “principal domestic manufacturing property” is any building or other structure or facility, and the land on which it sits and its associated fixtures, that

we use primarily for manufacturing, processing or warehousing, that is located in the United States and that has a gross book value in excess of 1% of our
consolidated net tangible assets, other than a building, structure or other facility that our board of directors has determined is not of material importance to the total
business that we and our subsidiaries conduct or a building or structure which is financed by obligations issued by a state, a territory, or a possession of the United
States, or any political subdivision of any of the foregoing, or the District of Columbia, the interest of which is excludable from gross income of the holders under
provisions of the tax code.

Further Issues

We may, without the consent of holders of any series of the notes, issue additional notes having the same ranking and the same interest rate, maturity and
other terms as the notes of that series. Any additional notes of any series, together with the outstanding notes of the applicable series, will constitute a single series
of notes under the indenture. No additional notes may be issued if an event of default has occurred and is continuing with respect to the applicable series of notes.
Additional notes cannot be issued under the same CUSIP, ISIN or Common Code number unless the additional notes and original notes are fungible for U.S.
federal income tax purposes.

Defeasance

Full Defeasance. If there is a change in federal tax law, as described below, we can legally release ourselves from any payment or other obligations on the

notes of a series if we put in place other arrangements for the holders of such notes to be repaid. This is called full defeasance. In order to achieve full defeasance,
we must do the following, among other things:

10

• We must deposit in trust for the benefit of all holders of the notes of the series any combination of money (in euros) and Federal Republic of

Germany obligations (as defined below) that will generate enough cash to make interest, principal and any other payments on the notes of that series
on their various due dates.

•

There must be a change in current federal tax law or an IRS ruling that lets us make the above deposit without causing holders or beneficial owners of
the notes of the series to be taxed on such notes any differently than if we did not make the deposit and just repaid such notes ourselves. (Under
current federal tax law, the deposit and our legal release from such notes would be treated as though we took back beneficial owners’ notes and gave
them their share of the cash and notes or bonds deposited in trust. In that event, beneficial owners could recognize gain or loss on the notes they give
back to us.)

• We must deliver to the trustee a legal opinion of our counsel confirming the tax law change described above.

If we ever did accomplish full defeasance, as described above, holders of defeased notes would have to rely solely on the trust deposit for repayment on

such notes. Holders of such notes could not look to us for repayment in the unlikely event of any shortfall.

Covenant Defeasance. Under current federal tax law, we can make the same type of deposit described above and be released from some of the restrictive

covenants in the notes. This is called covenant defeasance. In that event, holders of notes would lose the protection of those restrictive covenants but would gain the
protection of having money and securities set aside in trust to repay the notes. In order to achieve covenant defeasance of the notes of a series, we must do the
following:

• We must deposit in trust for the benefit of all holders of the notes of the series any combination of money (in euros) and Federal Republic of

Germany obligations that will generate enough cash to make interest, principal and any other payments on the notes on their various due dates.

• We must deliver to the trustee a legal opinion of our counsel confirming that under current federal income tax law we may make the above deposit

without causing holders or beneficial owners of the notes to be taxed on the notes any differently than if we did not make the deposit and just repaid
the notes ourselves.

If we accomplish covenant defeasance, the following provisions of the indenture and the notes would no longer apply:

•

•

•

Our promises regarding conduct of our business previously described under “—Restrictive Covenants.”

Restrictions regarding mergers or similar transactions, as described under “—Mergers and Similar Events.”

The events of default relating to mergers or similar transactions and either of the restrictive covenants described under “—Restrictive Covenants.”

If we accomplish covenant defeasance, holders of notes can still look to us for repayment of the notes if there were a shortfall in the trust deposit. In fact,
if one of the remaining events of default occurred, such as our bankruptcy, and the notes become immediately due and payable, there may be such a shortfall in the
trust deposit.

“Federal Republic of Germany obligations” means (1) securities that are direct obligations of the Federal Republic of Germany for the payment of which

its full faith and credit is pledged or (2) obligations of a person controlled or supervised by and acting as an agency or instrumentality of the Federal Republic of
Germany, the payment of which is unconditionally guaranteed as a full faith and credit obligation by the Federal Republic of

11

Germany, which, in either case under clauses (1) or (2) are not callable or redeemable at the option of the issuer thereof.

Events of Default

Holders of notes have special rights if an event of default occurs and is not cured, as described later in this subsection.

The term event of default with respect to each series of notes means any of the following:

• We do not pay the principal or any premium on such series of notes on its due date.

• We do not pay interest on such series of notes within 30 days of its due date.

• We remain in breach of either of the restrictive covenants described under “—Restrictive Covenants” or any other covenant or warranty in the

indenture for 90 days after we receive a notice of default stating we are in breach. The notice must be sent by either the trustee or holders of at least
25% of the principal amount of notes of the affected series.

• We file for bankruptcy or other specific events of bankruptcy, insolvency or reorganization occur.

• We do not pay Additional Amounts on such series of notes within 30 days after such payment is due.

Any payment in respect of the notes made in U.S. dollars due to the unavailability or nonuse of the euro as discussed under “—Payments in Euros” will

not constitute an event of default under the notes or the indenture governing the notes.

If an event of default has occurred and has not been cured, the trustee or the holders of at least 25% in principal amount of the outstanding notes of the

affected series may declare the entire principal amount of all the notes of that series to be due and immediately payable. This is called a declaration of acceleration.
The holders of at least a majority in principal amount of the notes of the affected series may cancel a declaration of acceleration of maturity.

Except in cases of default, where the trustee has some special duties, the trustee is not required to take any action under the indenture at the request of any

holders unless such holders offer the trustee reasonable protection, called an indemnity, against expenses and liability. If reasonable indemnity is provided, the
holders of a majority in principal amount of the outstanding notes of the relevant series may direct the time, method and place of conducting any lawsuit or other
formal legal action seeking any remedy available to the trustee. These majority holders may also direct the trustee in performing any other action under the
indenture with respect to the notes of the applicable series.

Before a holder of notes of any series bypasses the trustee and brings its own lawsuit or other formal legal action or takes other steps to enforce its rights

or protect its interests relating to the notes of such series, the following must occur:

•

•

•

The holder must give the trustee written notice that an event of default has occurred and remains uncured.

The holders of at least 25% in principal amount of all outstanding notes of the relevant series must make a written request that the trustee take action
because of the default, and must offer indemnity reasonably satisfactory to the trustee against the cost and other liabilities of taking that action.

The trustee must have not received from holders of a majority in principal amount of the outstanding notes of that series a direction inconsistent with
the written notice.

12

•

The trustee must have not taken action for 60 days after receipt of the above notice and offer of indemnity.

However, a holder of notes is entitled at any time to bring a lawsuit for the payment of money due on its notes on or after their due date.

Street name and other indirect holders should consult their banks or brokers for information on how to give notice or direction to or make a request of the

trustee and to make or cancel a declaration of acceleration.

We furnish to the trustee every year a written statement of our principal executive, financial or accounting officer certifying that to the best of such

signer’s knowledge we are in compliance with the indenture and the notes, or else specifying any default.

Form, Exchange and Registration of Transfer

We issued the notes only in fully registered form and without interest coupons.

A holder of notes may have its notes broken into more notes of smaller denominations of not less than €100,000 or combined into fewer notes of larger

denominations, as long as the total principal amount is not changed. This is called an exchange.

A holder of notes may exchange or register a transfer of notes at the office of the trustee. The trustee acts as our agent for registering notes in the names of
holders and registering transfers of notes. We may change this appointment to another entity or perform it ourselves. The entity performing the role of maintaining
the list of registered holders is called the security registrar. It also registers transfers. A holder of notes may also replace lost, stolen or mutilated notes at that office.
The trustee’s agent may require an indemnity before replacing any notes.

A holder of notes is not required to pay a service charge to register a transfer of notes or to exchange notes, but may be required to pay for any tax or other

governmental charge associated with the transfer or exchange. The security registrar makes the registration of transfer or exchange only if it is satisfied with such
holder’s proof of ownership.

We may cancel the designation of any trustee. We may also approve a change in the office through which any trustee acts.

If we redeem less than all of the notes of a particular series, we may block the issuance of, registration of transfer or exchange of notes during the period

beginning 15 days before the day we mail the notice of redemption and ending on the day of that mailing, in order to freeze the list of holders to prepare the
mailing. We may also refuse to register transfers or exchanges of notes selected for redemption, except that we will continue to permit transfers and exchanges of
the unredeemed portion of any note being partially redeemed.

The rules for exchange described above apply to exchange of notes for other notes of the same series and tenor.

Payment and Paying Agents

We pay interest to a holder of notes on each date interest is due if the holder is a direct holder listed in the trustee’s records at the close of business on

the fifteenth calendar day before the next interest payment date, even if such holder no longer owns the note on the interest due date. That particular day is called
the regular record date. Holders buying and selling notes must work out between them how to compensate for the fact that we pay all the interest for an interest
period to the one who is the registered holder on the regular record date.

We pay interest, principal and any other money due on the notes at the office of the trustee in London, UK. That office is currently located at125 Old

Broad Street, Fifth Floor, London EC2N 1AR United Kingdom. A holder

13

of notes must make arrangements to have its payments picked up at or wired from that office. We may also choose to pay interest by mailing checks.

Street name and other indirect holders should consult their banks or brokers for information on how they may receive payments.

We may also arrange for additional payment offices, and may cancel or change these offices. These offices are called paying agents. We may also choose

to act as our own paying agent. We must notify holders of notes of changes in the paying agents for any particular notes of the series.

Notices

We and the trustee send notices regarding the notes only to direct holders, using their addresses as listed in the trustee’s records.

All paying agents must return to us upon our request all money paid by us that remains unclaimed two years after the amount is due to direct holders.

After that two-year period, holders of notes may look only to us for payment and not to the trustee, any other paying agent or anyone else.

Book-Entry System

Upon issuance, the notes of each series are represented by one or more global notes. Each global note is deposited with, or on behalf of, a common

depositary, and registered in the name of the nominee of the common depositary for the accounts of Clearstream and Euroclear.

Investors may elect to hold interests in the global notes held by the depository through Clearstream Banking, société anonyme (“Clearstream”) or

Euroclear Bank S.A./N.V., as operator of the Euroclear System (“Euroclear”) if they are participants of such systems, or indirectly through organizations that are
participants in such systems. Clearstream and Euroclear hold interests on behalf of their participants through customers’ securities accounts in Clearstream’s and
Euroclear’s names on the books of their respective depositories. Book-entry interests in the notes and all transfers relating to the notes are reflected in the book-
entry records of Clearstream and Euroclear. Because holders acquire, hold and transfer security entitlements with respect to the notes through Clearstream,
Euroclear and their participants, a beneficial holder’s rights with respect to the notes is subject to the laws (including Article 8 of the Uniform Commercial Code)
and contractual provisions governing a holder’s relationship with its securities intermediary and the relationship between its securities intermediary and each other
securities intermediary and between it and us, as the issuer. Except as set forth below, the global notes may be transferred, in whole and not in part, only to another
nominee of the depository or to a successor of the depository or its nominee.

No global note may be exchanged in whole or in part for notes registered, and no transfer of a global note in whole or in part may be registered, in the

name of any person other than the depository or any nominee of the depository unless (i) the depository has notified us that it is unwilling or unable to continue as
depository for such global note or has ceased to be qualified to act as such as required by the indenture, (ii) there has occurred and is continuing an event of default
with respect to the notes or (iii) we determine in our sole discretion at any time that the global note shall be so exchangeable.

Any global note that is exchangeable pursuant to the preceding sentence shall be exchangeable in whole for separate notes in registered form of any

authorized denomination and of like tenor and aggregate principal amount. These notes shall be registered in the name or names of such person or persons as the
depository instructs the trustee. We expect that these instructions would be based upon directions received by the depository from its participants with respect to
ownership of beneficial interests in such global note.

Except in the limited circumstances referred to above, owners of beneficial interests in a global note are not entitled to have such global note registered in

their names, will not receive and are not entitled to receive physical

14

delivery of notes in exchange therefor and are not considered to be the owners or holders of such global note for any purpose under the notes or the indenture.
Accordingly, each person owning a beneficial interest in the global note must rely on the procedures of the participant through which such person owns its interest
to exercise any rights of a holder under the indenture.

The indenture provides that the depository, as a holder, may appoint agents and otherwise authorize participants to give or take any request, demand,

authorization, direction, notice, consent, waiver, or other action which a holder is entitled to give or take under the indenture.

Governing Law

The indenture and the notes are governed by, and construed and enforced in accordance with, the laws of the State of New York applicable to agreements

made or instruments entered into and performed in New York State.

Relationship with Trustee

U.S. Bank Trust National Association is the trustee under the indenture. U.S. Bank Trust National Association performs services for us in the ordinary

course of business and serves as the trustee with respect to certain of our other outstanding debt securities.

Open Market Purchases

We may at any time and from time to time purchase notes in the open market or otherwise.

The Paying Agent, Transfer Agent and Security Registrar

Elavon Financial Services DAC is the security registrar with respect to the notes. Elavon Financial Services DAC, UK Branch is the paying agent and

transfer agent with respect to the notes.

15

Description of the Registrant’s 0.500% Notes due 2024 and 1.375% Notes due 2036

Exhibit 4.12

Registered under Section 12 of the Securities Exchange Act of 1934

In this description, unless the context requires otherwise:

•

•

•

•

•

“2024 notes” means the 0.500% Notes due 2024 of Merck & Co., Inc.;

“2036 notes” means the 1.375% Notes due 2036 of Merck & Co., Inc.;

“holder” means a direct holder and not a street name or other indirect holder of notes;

 “notes” means the 2024 notes and 2036 notes, collectively; and

“we,” “our” and “us” refer to Merck & Co., Inc., but not to any of Merck & Co., Inc.’s subsidiaries.

The following sets forth a description of the material terms of the notes. The description is qualified in its entirety by reference to the indenture, dated as

of January 6, 2010, between us and U.S. Bank Trust National Association, as trustee (a copy of which is included as Exhibit 4.1 to our Current Report on Form 8-K
filed on December 10, 2010) and, as applicable, the officers’ certificate pursuant to such indenture with respect to the 2024 notes, dated November 2, 2016,
including the form of the 2024 notes (a copy of which is included as Exhibit 4.1 to our Current Report on Form 8-K filed on November 2, 2016) or the officers’
certificate pursuant to such indenture with respect to the 2036 notes, dated November 2, 2016, including the form of the 2036 notes (a copy of which is included as
Exhibit 4.2 to our Current Report on Form 8-K filed on November 2, 2016). You are encouraged to read such indenture and officers’ certificates for additional
information.

The 2024 notes and the 2036 notes are each a separate series of notes under the indenture.

The 2024 notes are initially limited to €500,000,000 aggregate principal amount, which amount remains outstanding as of February 24, 2021, and will

mature on November 2, 2024. The 2036 notes are initially limited to €500,000,000 aggregate principal amount, which amount remains outstanding as of February
24, 2021, and will mature on November 2, 2036.

The notes are unsecured and rank equally with all our other unsecured and unsubordinated indebtedness from time to time outstanding. The notes are not

guaranteed by any of our subsidiaries and are therefore structurally subordinated to all liabilities of our subsidiaries from time to time outstanding, including any
guarantees provided by our subsidiaries. The notes also are effectively subordinated to any secured debt we or our subsidiaries incur to the extent of the value of
any assets securing such debt.

The notes were issued in denominations of €100,000 and integral multiples of €1,000 in excess thereof.

We may issue as many distinct series of debt securities under the indenture as we wish. A series of debt securities may be guaranteed by one or more of

our subsidiaries. There is no limit on the amount of debt securities we may issue under the indenture and the provisions of the indenture allow us to issue debt
securities with terms different from those previously issued under the indenture. Also, as discussed below under “—Further Issues,” we may “reopen” a previous
issue of a series of debt securities and issue additional debt securities of that series. We also may issue other debt under other indentures or documentation,
containing provisions different from those included in the indenture or applicable to the notes.

The notes are listed on the New York Stock Exchange. We have no obligation to maintain such listing and we may delist the notes at any time.

The 2024 notes bear interest at a rate of 0.500% per annum and the 2036 notes bear interest at a rate of 1.375% per annum. Interest on the notes is payable

annually on November 2 of each year to the person in whose name such notes were registered at the close of business on the fifteenth calendar day before the next
interest payment date. If any payment date for the notes is not a business day, payment is made on the next business day, but we are not liable for any additional
interest as a result of the delay in payment. With respect to the notes, by business day, we mean any Monday, Tuesday, Wednesday, Thursday or Friday which is
not a day when banking institutions are authorized or obligated by law or executive order to be closed in The City of New York or London and, for any place of
payment outside of The City of New York or London, in such place of payment, and on which the Trans-European Automated Real-time Gross Settlement Express
Transfer system (the TARGET2 system), or any successor thereto, operates.

With respect to each series of notes, we compute the amount of interest payable on the basis of (i) the actual number of days in the period for which
interest is being calculated and (ii) the actual number of days from (and including) the last date on which interest was paid on the notes of such series (or November
2, 2016 if no interest has been paid on the notes of such series) to (but excluding) the next scheduled interest payment date. This payment convention is referred to
as ACTUAL/ACTUAL (ICMA) as defined in the rulebook of the International Capital Market Association.

Elavon Financial Services DAC, UK Branch initially acts as principal paying agent for the notes (the “paying agent”). Elavon Financial Services DAC
initially acts as security registrar (the “security registrar”) and transfer agent and U.S. Bank Trust National Association initially acts as trustee (“trustee”) for the
notes. We have entered into an issuing and paying agency agreement in relation to the notes between us, U.S. Bank Trust National Association, as trustee, Elavon
Financial Services DAC, UK Branch, as principal paying agent and Elavon Financial Services Limited as security registrar and transfer agent. Payment of principal
of and interest on the notes is made through the office of the principal paying agent in London. The terms “principal paying agent” and “paying agent” shall include
any successors appointed from time to time in accordance with the provisions of the issuing and paying agency agreement, and any reference to an “agent” or
“agents” shall mean any or all (as applicable) of such persons.

Payments in Euros

All payments of interest and principal, including payments made upon any redemption of the notes, are payable in euros. If, at any time, the euro is

unavailable to us due to the imposition of exchange controls or other circumstances beyond our control or if the euro is no longer being used by the then member
states of the European Monetary Union that have adopted the euro as their currency or for the settlement of transactions by public institutions of or within the
international banking community, then all payments in respect of the notes will be made in U.S. dollars until the euro is again available to us or so used. In such
circumstances, the amount payable on any date in euros will be converted into U.S. dollars on the basis of the most recently available market exchange rate for
euros. Any payment in respect of the notes so made in U.S. dollars will not constitute an event of default under the notes or the indenture governing the notes.
Neither the trustee nor the paying agent shall have any responsibility for any calculation or conversion in connection with the foregoing.

Investors are subject to foreign exchange risks as to payments of principal and interest that may have important economic and tax consequences to them.

Optional Redemption

Each series of notes is redeemable in whole or in part, at our option at any time or from time to time, at a redemption price equal to the greater of (i) 100%

of the principal amount of the notes to be redeemed or (ii) the sum of the present values of the Remaining Scheduled Payments (as defined below) (not including
any portion of such payment of interest accrued as of the date of redemption) discounted to the redemption date on an annual basis (ACTUAL/ACTUAL (ICMA))
at the applicable Comparable Government Bond Rate (as defined below), plus 12.5 basis points with respect to the 2024 notes and the Comparable Government
Bond Rate plus 15 basis points with respect to the 2036 notes, plus, in each case, accrued and unpaid interest on the principal amount being redeemed to, but
excluding, the redemption date.

2

On or after August 2, 2024 for the 2024 notes and August 2, 2036 for the 2036 notes (three months prior to the maturity date of the 2024 notes or the 2036

notes, as applicable), we may redeem in whole or in part the 2024 notes or the 2036 notes, as applicable, at any time or from time to time, at our option, at a
redemption price equal to 100% of the principal amount of the applicable notes being redeemed, plus accrued and unpaid interest on the principal amount being
redeemed to, but excluding, the redemption date.

We are required to give notice of redemption at least 30 days, but no more than 60 days, prior to the redemption date. The notice will be mailed to the
registered address of each holder of that series of notes. The principal amount of a note remaining outstanding after a redemption in part shall be €100,000 or an
integral multiple of €1,000 in excess thereof.

“Comparable Government Bond Rate” means, with respect to any redemption date, the price, expressed as a percentage (rounded to three decimal places,

with 0.0005 being rounded upwards), at which the gross redemption yield on the notes to be redeemed, if they were to be purchased at such price on the third
business day prior to the date fixed for redemption, would be equal to the gross redemption yield on such business day of the Comparable Government Bond (as
defined below) on the basis of the middle market price of the Comparable Government Bond prevailing at 11:00 a.m. (London time) on such business day as
determined by an independent investment bank selected by us.

“Comparable Government Bond” means, in relation to any Comparable Government Bond Rate calculation, at the discretion of an independent
investment bank selected by us, a German federal government bond whose maturity is closest to the maturity of the notes to be redeemed, or if such independent
investment bank in its discretion determines that such similar bond is not in issue, such other German government bond as such independent investment bank may,
with the advice of three brokers of, and/or market makers in, German government bonds selected by us, determine to be appropriate for determining the
Comparable Government Bond Rate.

“Remaining Scheduled Payments” means, with respect to each note to be redeemed, the remaining scheduled payments of principal of and interest on the

note that would be due after the related redemption date but for the redemption. If that redemption date is not an interest payment date with respect to a note, the
amount of the next succeeding scheduled interest payment on the note will be reduced by the amount of interest accrued on the note to the redemption date.

If fewer than all of the notes of any series are to be redeemed, the trustee will select the particular notes or portions thereof for redemption from the

outstanding notes not previously called, pro rata or by lot, or in such other manner as we direct each in accordance with the depositary’s procedures.

Unless we default in payment of the redemption price, on and after the redemption date interest will cease to accrue on the notes or portions thereof called

for redemption.

The notes are also subject to redemption if certain events occur involving United States taxation. See “—Taxation Redemption.”

Additional Amounts

All payments of principal and interest in respect of the notes are made free and clear of, and without deduction or withholding for or on account of any

present or future taxes, duties, assessments or other governmental charges of whatsoever nature imposed, levied, collected, withheld or assessed by the United
States or any political subdivision or taxing authority of or in the United States (collectively, “Taxes”), unless such withholding or deduction is required by law.

In the event such withholding or deduction of Taxes is required by law, subject to the limitations described below, we will pay to the holder of any note
that is not beneficially owned by a U.S. Holder (as defined below) such additional amounts (“Additional Amounts”) as may be necessary in order that every net
payment received by the

3

beneficial owner of such note of principal of or interest or any other amount payable on the notes (including upon redemption), after deduction or withholding for
or on account of such Taxes, will not be less than the amount provided for in such note to be then due and payable before deduction or withholding for or on
account of such Taxes.

However, our obligation to pay Additional Amounts shall not apply to:

(a)    any Taxes which would not have been so imposed but for:

(1)    the existence of any present or former connection between such holder or beneficial owner (or between a fiduciary, settlor,
beneficiary, member or shareholder or other equity owner of, or a person having a power over, such holder or beneficial owner, if such holder or
beneficial owner is an estate, a trust, a limited liability company, a partnership, a corporation or other entity) and the United States, including,
without limitation, such holder or beneficial owner (or such fiduciary, settlor, beneficiary, member, shareholder or other equity owner or person
having such a power) being or having been a citizen or resident or treated as a resident of the United States or being or having been engaged in a
trade or business in the United States or being or having been present in the United States or having or having had a permanent establishment in
the United States;

(2)    the failure of such holder or beneficial owner to comply with any certification, information or other reporting requirement, if

compliance is required under United States tax laws and regulations to establish entitlement to a partial or complete exemption from such Taxes
(including, but not limited to, the requirement to provide Internal Revenue Service Form W-8BEN, Form W-8BEN-E, Form W-8ECI, or any
subsequent versions thereof or successor thereto); or

(3)    such holder’s or beneficial owner’s present or former status as a personal holding company or a foreign personal holding company

with respect to the United States, as a controlled foreign corporation with respect to the United States, as a passive foreign investment company
with respect to the United States, as a foreign tax exempt organization with respect to the United States or as a corporation which accumulates
earnings to avoid United States federal income tax;

(b)    any Taxes imposed by reason of the holder or beneficial owner:

(1)    owning or having owned, directly or indirectly, actually or constructively, 10% or more of the total combined voting power of all

classes of our stock, as described in section 871(h)(3) of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”),

(2)    being a bank receiving interest described in section 881(c)(3)(A) of the Internal Revenue Code, or

(3)    being a controlled foreign corporation with respect to the United States that is related to us by stock ownership;

(c)    any Taxes which would not have been so imposed but for the presentation by the holder or beneficial owner of such note for payment on a
date more than 30 days after the date on which such payment became due and payable or the date on which payment of the note is duly provided for and
notice is given to holders, whichever occurs later, except to the extent that the holder or beneficial owner would have been entitled to such Additional
Amounts on presenting such note on any date during such 30-day period;

4

(d)    any estate, inheritance, gift, sales, excise, transfer, personal property, wealth or similar Taxes;

(e)    any Taxes which are payable otherwise than by withholding from a payment on such note;

(f)    any Taxes which are payable by a holder that is not the beneficial owner of the note, or a portion of the note, or that is a fiduciary,

partnership, limited liability company or other similar entity, but only to the extent that a beneficial owner, a beneficiary or settlor with respect to such
fiduciary or member of such partnership, limited liability company or similar entity would not have been entitled to the payment of an additional amount
had such beneficial owner, settlor, beneficiary or member received directly its beneficial or distributive share of the payment;

(g)    any Taxes required to be withheld by any paying agent from any payment on any note, if such payment can be made without such

withholding by at least one other paying agent;

(h)    any Taxes imposed under Sections 1471 through 1474 of the Internal Revenue Code (or any amended or successor provisions), any current

or future regulations or official interpretations thereof, any agreement entered into pursuant to Section 1471(b) of the Code or any fiscal or regulatory
legislation, rules or practices adopted pursuant to any intergovernmental agreement entered into in connection with the implementation of such sections of
the Code;

(i)    any combination of items (a), (b), (c), (d), (e), (f), (g) and (h).

For purposes of this section, the acquisition, ownership, enforcement, or holding of or the receipt of any payment with respect to a note will not constitute

a connection (1) between the holder or beneficial owner and the United States or (2) between a fiduciary, settlor, beneficiary, member or shareholder or other
equity owner of, or a person having a power over, such holder or beneficial owner if such holder or beneficial owner is an estate, a trust, a limited liability
company, a partnership, a corporation or other entity and the United States.

Any reference in this description, in the indenture or in the notes to principal or interest or other payment on the notes shall be deemed to refer also to

Additional Amounts which may be payable under the provisions of this section.

We will pay all stamp and other duties, if any, which may be imposed by the United States or any political subdivision thereof or taxing authority therein

with respect to the issuance of the notes pursuant to this offering.

Except as specifically provided under the heading “—Additional Amounts,” we will not be required to make any payment with respect to any tax, duty,

assessment or other governmental charge imposed by any government or any political subdivision or taxing authority of or in the United States.

A “U.S. Holder” is a beneficial owner of a note or notes that is for U.S. federal income tax purposes:

•

•

•

•

an individual who is a citizen or resident of the United States;

a corporation created or organized in or under the laws of the United States, any state thereof or the District of Columbia;

an estate, the income of which is subject to U.S. federal income taxation regardless of the source of that income; or

a trust, if (1) a U.S. court is able to exercise primary supervision over the trust’s administration and one or more “United States persons” (within the
meaning of the Internal Revenue Code) have the authority

5

to control all of the trust’s substantial decisions, or (2) the trust has a valid election in effect under applicable Treasury regulations to be treated as a
“United States person.”

Taxation Redemption

The notes may be redeemed at our option, in whole but not in part, at a redemption price equal to 100% of the principal amount of the notes to be
redeemed, together with interest accrued and unpaid to, but excluding, the redemption date, at any time, on giving not less than 30 nor more than 60 days’ notice in
accordance with “Notices” below if:

(a)    we have or will become obligated to pay Additional Amounts as a result of (i) any change in or amendment to the laws, regulations or

rulings of the United States or any political subdivision or any taxing authority of or in the United States affecting taxation, or (ii) any change in or
amendment to an official application, interpretation, administration or enforcement of such laws, regulations or rulings, which change or amendment is
announced or becomes effective on or after October 26, 2016; provided we reasonably determine that such obligation cannot be avoided by our taking
reasonable measures available to us without significant difficulty, cost or expense, or

(b)    any action shall have been taken by a taxing authority, or any action has been brought in a court of competent jurisdiction, in the United

States or any political subdivision or taxing authority of or in the United States, including any of those actions specified in (a) above, whether or not such
action was taken or brought with respect to us, or any change, clarification, amendment, application or interpretation of such laws, regulations or rulings
shall be officially proposed, in any such case on or after October 26, 2016, which results in a substantial likelihood that we will be required to pay
Additional Amounts on the next interest payment date.

However, no such notice of redemption shall be given earlier than 90 days prior to the earliest date on which we would be, in the case of a redemption for

the reasons specified in (a) above, or there would be a substantial likelihood that we would be, in the case of a redemption for the reasons specified in (b) above,
obligated to pay such Additional Amounts if a payment in respect of the notes were then due and, at the time such notification of redemption is given, such
circumstance remains in effect.

Prior to the publication of any notice of redemption pursuant to this section, in the case of a redemption for the reasons specified in (a) or (b) above, we

will deliver to the trustee:

(1)    a certificate signed by one of our duly authorized officers stating that we are entitled to effect such redemption and setting forth a statement

of facts showing that the conditions precedent to our right so to redeem have occurred, and

(2)    a written opinion of independent legal counsel of recognized standing to the effect that we have or will become obligated to pay such
Additional Amounts as a result of such change or amendment or that there is a substantial likelihood that we will be required to pay such Additional
Amounts as a result of such action or proposed change, clarification, amendment, application or interpretation, as the case may be.

Such notice, once delivered by us to the trustee, will be irrevocable.

Modification and Waiver

There are three types of changes we can make to the indenture and the notes.

Changes Requiring Holder Approval. First, there are changes that cannot be made to the notes of any series without specific approval by each holder of

the notes of such series affected thereby. Following is a list of those types of changes:

6

•

•

•

•

•

•

change the payment due date of any installment of the principal or any premium or interest on a note stated in the note;

reduce any amounts due on a note;

change the place or currency of payment on a note;

impair holders’ right to sue for payment;

reduce the percentage of notes of any series, the holders of which must consent to modify or amend the indenture;

reduce the percentage of notes of any series the holders of which must consent to waive compliance with certain provisions of the indenture or to
waive certain defaults; and

• modify any other aspect of the provisions dealing with modification and waiver of the indenture except to increase any such percentage or to provide
that certain other provisions of the indenture cannot be modified or waived without the consent of the holder of each outstanding security affected
thereby.

Changes Requiring a Majority Vote. The second type of change to the indenture and the notes is the kind that requires a vote in favor by holders owning

not less than a majority of the principal amount of the notes of the particular series affected. Most changes fall into this category, such as if we wish to obtain a
waiver of all or part of the restrictive covenants described below, or a waiver of a past default. However, we cannot obtain a waiver of a payment default or any
other aspect of the indenture or the notes listed in the first category above under “—Changes Requiring Holder Approval” unless we obtain the individual consent
of each holder of the notes of such series affected thereby to the waiver.

Changes Not Requiring Approval. The third type of change does not require any vote by holders of notes. This type is limited to the addition or release of

a guarantee, corrections and clarifications and other changes that would not adversely affect holders of the notes.

Further Details Concerning Voting. When taking a vote, we use the U.S. dollar equivalent to decide how much principal amount to attribute to a note.

Notes will not be considered outstanding and therefore will not carry voting rights if we have deposited or set aside in trust for the holders thereof money

for their payment or redemption. Notes will also not be eligible to vote if they have been fully defeased as described under “—Defeasance—Full Defeasance.”

We may set any day as a record date for the purpose of determining the holders of outstanding notes that are entitled to vote or take other action under the

indenture. In some circumstances, the trustee may set a record date for action by holders.

Street name and other indirect holders should consult their banks or brokers for information on how approval may be granted or denied if we seek to

change the indenture or the notes or request a waiver.

Mergers and Similar Events

We may consolidate or merge with another company or firm. We may also convey, transfer or lease all of our properties and assets substantially as an

entirety to another firm, or buy or lease substantially all of the assets of another firm. However, we may not take any of these actions unless the following
conditions, among others, are met:

• We are the surviving entity or, when we merge out of existence or convey, transfer or lease all of our properties and assets substantially as an entirety,

the other firm must be a corporation, limited liability

7

•

•

company, partnership or trust organized under the laws of a U.S. state or the District of Columbia or under federal law and it must agree to be legally
responsible for the notes.

The merger, sale of assets or other transaction must not cause a default on the notes, and we must not already be in default unless the merger or other
transaction would cure the default. For purposes of this no-default test, a default would include an event of default, as described under “—Default and
Remedies—Events of Default—What is an Event of Default,” that has occurred and not been cured. A default for this purpose would also include the
occurrence of any event that would be an event of default if we received the required notice of our default or if under the indenture the default would
become an event of default after existing for a specific period of time.

It is possible that the merger, sale of assets or other transaction would cause some of our property to become subject to a mortgage or other legal
mechanism giving lenders preferential rights in that property over other lenders or over our general creditors if we fail to pay them back. We have
promised to limit these preferential rights, as discussed under “—Restrictive Covenants.” If a merger or other transaction would create any liens on
any of our property, we must comply with those restrictive covenants. We would do this either by deciding that the liens were permitted, or by
following the requirements of the restrictive covenants to grant an equivalent or higher-ranking lien to the holders of the notes on the same property
that we own.

If the conditions described above are satisfied with respect to any series of notes, we do not need to obtain the approval of the holders of those notes in
order to merge or consolidate or to sell our assets. Also, these conditions apply only if we wish to merge or consolidate with another entity or convey, transfer or
lease all of our properties and assets substantially as an entirety. We do not need to satisfy these conditions if we enter into other types of transactions, including
any transaction in which we acquire the stock or assets of another entity, any transaction that involves a change of control but in which we do not merge or
consolidate and any transaction in which we convey, transfer or lease less than all of our properties and assets substantially as an entirety. It is possible that these
other types of transactions may result in a reduction in our credit rating, may reduce our operating results or may impair our financial condition. However, the
holders of notes have no approval right with respect to any transaction of this type.

Restrictive Covenants

Restrictions on Secured Debt. Some of our property may be subject to a mortgage or other legal mechanism that gives our lenders preferential rights in
that property over other lenders, including the holders of the notes, or over our general creditors if we fail to pay them back. These preferential rights are called
liens. Debt which is protected by these preferential rights is called secured debt. In the indenture, we promise that neither we nor our domestic subsidiaries (as
defined below) will incur any new secured debt that is secured by a lien on any of our or our domestic subsidiaries’ principal domestic manufacturing properties (as
defined below), or on any shares of stock of any of our domestic subsidiaries that own or lease a principal domestic manufacturing property, unless we grant an
equivalent or higher-ranking lien on the same property to the holders of the notes and other outstanding debt securities issued under the indenture.

We do not need to comply with this restriction if the amount of all debt that would be secured by liens on principal domestic manufacturing properties,

including the new debt, the notes and other outstanding debt securities issued under the indenture which we would so secure as described in the previous sentence,
and all attributable debt (as defined below) that results from a sale and leaseback transaction involving principal domestic manufacturing properties, is less than
10% of our consolidated net tangible assets (as defined below).

This restriction on secured debt does not apply to debt secured by certain types of liens, and we can disregard this secured debt when we calculate the

limits imposed by this restriction. These types of liens are:

•

liens on the property of any of our domestic subsidiaries, or on their shares of stock, if those liens existed at the time the corporation became our
domestic subsidiary;

8

•

•

•

•

•

•

•

with respect to any series of notes, any lien existing on the date of issuance of such notes;

liens in favor of us or our domestic subsidiaries;

liens in favor of U.S. governmental bodies that we granted in order to assure our payments to such bodies that we owe by law or because of a
contract we entered into;

liens in favor of any customer arising in respect of payments made by or on behalf of a customer for goods produced for, or services rendered to,
customers in the ordinary course of business not exceeding the amount of those payments;

statutory liens, liens for taxes or assessments or governmental charges or levies not yet due or delinquent or which can be paid without penalty or
are being contested in good faith, landlord’s liens on leased property, easements and other liens of a similar nature;

liens on property or shares of stock that existed at the time we acquired them, including property we may acquire through a merger or similar
transaction, or that we granted in order to purchase the property, which are sometimes called purchase money mortgages; and

debt secured by liens that extend, renew or replace any of these types of liens.

We and our subsidiaries may have as much unsecured debt as we may choose.

Restrictions on Sales and Leasebacks. We promise that neither we nor any of our domestic subsidiaries will enter into any sale and leaseback transaction

involving a principal domestic manufacturing property, unless we comply with this restrictive covenant. A sale and leaseback transaction generally is an
arrangement between us or a domestic subsidiary and a bank, insurance company or other lender or investor where we or the domestic subsidiary sell a property to
a lender or investor more than 120 days after the acquisition of the property or the completion of construction of the property and the beginning of its full operation
and we lease the property back from the lender.

We can comply with this restrictive covenant in either of two ways:

•

•

First, we will be in compliance if we or our domestic subsidiary could grant a lien on the principal domestic manufacturing property in an amount
equal to the attributable debt for the sale and leaseback transaction without being required to grant an equivalent or higher-ranking lien to the holders
of the notes and other outstanding debt securities issued under the indenture under the restriction on secured debt described above.

Second, we can comply if we retire an amount of our or any domestic subsidiary’s funded debt which is not subordinated in right of payment to any
outstanding notes or other outstanding debt securities issued under the indenture, within 120 days of the transaction, equal to the greater of the net
proceeds of the sale of the principal domestic manufacturing property that we lease in the transaction or the fair market value of that property, subject
to credits for voluntary retirements of notes and other outstanding debt securities issued under the indenture and funded debt we or the domestic
subsidiary may make.

This restriction on sales and leasebacks does not apply to any sale and leaseback transaction that is between us and one of our domestic subsidiaries or

between domestic subsidiaries, or that involves a lease for a period of three years or less.

Definitions Relating to our Restrictive Covenants. Following are summaries of the meanings of the terms that are important in understanding the

restrictive covenants previously described:

9

“Attributable debt” means the total net amount of rent, discounted at 1% per annum over the weighted average yield to maturity of the outstanding notes

and other outstanding debt securities issued under the indenture compounded semi-annually, that is required to be paid during the remaining term of any lease.

“Consolidated net tangible assets” is the total amount of assets, less reserves and certain other permitted deductible items, after subtracting all current

liabilities and all goodwill, trade names, trademarks, patents, unamortized debt discounts and expenses and similar intangible assets, as such amounts appear on our
most recent consolidated balance sheet and computed in accordance with generally accepted accounting principles.

A “domestic subsidiary” means any of our subsidiaries which transacts substantially all of its business in the United States, has substantially all of its

fixed assets located in the United States, or owns or leases principal domestic manufacturing property. However, a subsidiary whose principal business is financing
our operations outside of the United States is not a domestic subsidiary. A subsidiary is a corporation in which we and/or one or more of our other subsidiaries
owns at least 50% of the voting stock (generally defined as stock that ordinarily permits its owners to vote for the election of directors).

“Funded debt” means all debt for borrowed money that either has a maturity of 12 months or more from the date on which the calculation of funded debt

is made or has a maturity of less than 12 months from that date but is by its terms renewable or extendible beyond 12 months from that date at the option of the
borrower.

A “principal domestic manufacturing property” is any building or other structure or facility, and the land on which it sits and its associated fixtures, that

we use primarily for manufacturing, processing or warehousing, that is located in the United States and that has a gross book value in excess of 1% of our
consolidated net tangible assets, other than a building, structure or other facility that our board of directors has determined is not of material importance to the total
business that we and our subsidiaries conduct or a building or structure which is financed by obligations issued by a state, a territory, or a possession of the United
States, or any political subdivision of any of the foregoing, or the District of Columbia, the interest of which is excludable from gross income of the holders under
provisions of the tax code.

Further Issues

We may, without the consent of holders of any series of the notes, issue additional notes having the same ranking and the same interest rate, maturity and
other terms as the notes of that series. Any additional notes of any series, together with the outstanding notes of the applicable series, will constitute a single series
of notes under the indenture. No additional notes may be issued if an event of default has occurred and is continuing with respect to the applicable series of notes.
Additional notes cannot be issued under the same CUSIP, ISIN or Common Code number unless the additional notes and original notes are fungible for U.S.
federal income tax purposes.

Defeasance

Full Defeasance. If there is a change in federal tax law, as described below, we can legally release ourselves from any payment or other obligations on the

notes of a series if we put in place other arrangements for the holders of such notes to be repaid. This is called full defeasance. In order to achieve full defeasance,
we must do the following, among other things:

• We must deposit in trust for the benefit of all holders of the notes of the series any combination of money (in euros) and Federal Republic of

Germany obligations (as defined below) that will generate enough cash to make interest, principal and any other payments on the notes of that series
on their various due dates.

•

There must be a change in current federal tax law or an IRS ruling that lets us make the above deposit without causing holders or beneficial owners of
the notes of the series to be taxed on such notes any differently than if we did not make the deposit and just repaid such notes ourselves. (Under
current federal tax law, the deposit and our legal release from such notes would be treated as though we took

10

back beneficial owners’ notes and gave them their share of the cash and notes or bonds deposited in trust. In that event, beneficial owners could
recognize gain or loss on the notes they give back to us.)

• We must deliver to the trustee a legal opinion of our counsel confirming the tax law change described above.

If we ever did accomplish full defeasance, as described above, holders of defeased notes would have to rely solely on the trust deposit for repayment on

such notes. Holders of such notes could not look to us for repayment in the unlikely event of any shortfall.

Covenant Defeasance. Under current federal tax law, we can make the same type of deposit described above and be released from some of the restrictive

covenants in the notes. This is called covenant defeasance. In that event, holders of notes would lose the protection of those restrictive covenants but would gain the
protection of having money and securities set aside in trust to repay the notes. In order to achieve covenant defeasance of the notes of a series, we must do the
following:

• We must deposit in trust for the benefit of all holders of the notes of the series any combination of money (in euros) and Federal Republic of

Germany obligations that will generate enough cash to make interest, principal and any other payments on the notes on their various due dates.

• We must deliver to the trustee a legal opinion of our counsel confirming that under current federal income tax law we may make the above deposit

without causing holders or beneficial owners of the notes to be taxed on the notes any differently than if we did not make the deposit and just repaid
the notes ourselves.

If we accomplish covenant defeasance, the following provisions of the indenture and the notes would no longer apply:

•

•

•

Our promises regarding conduct of our business previously described under “—Restrictive Covenants.”

Restrictions regarding mergers or similar transactions, as described under “—Mergers and Similar Events.”

The events of default relating to mergers or similar transactions and either of the restrictive covenants described under “—Restrictive Covenants.”

If we accomplish covenant defeasance, holders of notes can still look to us for repayment of the notes if there were a shortfall in the trust deposit. In fact,
if one of the remaining events of default occurred, such as our bankruptcy, and the notes become immediately due and payable, there may be such a shortfall in the
trust deposit.

“Federal Republic of Germany obligations” means (1) securities that are direct obligations of the Federal Republic of Germany for the payment of which

its full faith and credit is pledged or (2) obligations of a person controlled or supervised by and acting as an agency or instrumentality of the Federal Republic of
Germany, the payment of which is unconditionally guaranteed as a full faith and credit obligation by the Federal Republic of Germany, which, in either case under
clauses (1) or (2) are not callable or redeemable at the option of the issuer thereof.

Events of Default

Holders of notes have special rights if an event of default occurs and is not cured, as described later in this subsection.

The term event of default with respect to each series of notes means any of the following:

11

• We do not pay the principal or any premium on such series of notes on its due date.

• We do not pay interest on such series of notes within 30 days of its due date.

• We remain in breach of either of the restrictive covenants described under “—Restrictive Covenants” or any other covenant or warranty in the

indenture for 90 days after we receive a notice of default stating we are in breach. The notice must be sent by either the trustee or holders of at least
25% of the principal amount of notes of the affected series.

• We file for bankruptcy or other specific events of bankruptcy, insolvency or reorganization occur.

• We do not pay Additional Amounts on such series of notes within 30 days after such payment is due.

Any payment in respect of the notes made in U.S. dollars due to the unavailability or nonuse of the euro as discussed under “—Payments in Euros” will

not constitute an event of default under the notes or the indenture governing the notes.

If an event of default has occurred and has not been cured, the trustee or the holders of at least 25% in principal amount of the outstanding notes of the

affected series may declare the entire principal amount of all the notes of that series to be due and immediately payable. This is called a declaration of acceleration.
The holders of at least a majority in principal amount of the notes of the affected series may cancel a declaration of acceleration of maturity.

Except in cases of default, where the trustee has some special duties, the trustee is not required to take any action under the indenture at the request of any

holders unless such holders offer the trustee reasonable protection, called an indemnity, against expenses and liability. If reasonable indemnity is provided, the
holders of a majority in principal amount of the outstanding notes of the relevant series may direct the time, method and place of conducting any lawsuit or other
formal legal action seeking any remedy available to the trustee. These majority holders may also direct the trustee in performing any other action under the
indenture with respect to the notes of the applicable series.

Before a holder of notes of any series bypasses the trustee and brings its own lawsuit or other formal legal action or takes other steps to enforce its rights

or protect its interests relating to the notes of such series, the following must occur:

•

•

•

•

The holder must give the trustee written notice that an event of default has occurred and remains uncured.

The holders of at least 25% in principal amount of all outstanding notes of the relevant series must make a written request that the trustee take action
because of the default, and must offer indemnity reasonably satisfactory to the trustee against the cost and other liabilities of taking that action.

The trustee must have not received from holders of a majority in principal amount of the outstanding notes of that series a direction inconsistent with
the written notice.

The trustee must have not taken action for 60 days after receipt of the above notice and offer of indemnity.

However, a holder of notes is entitled at any time to bring a lawsuit for the payment of money due on its notes on or after their due date.

Street name and other indirect holders should consult their banks or brokers for information on how to give notice or direction to or make a request of the

trustee and to make or cancel a declaration of acceleration.

12

We furnish to the trustee every year a written statement of our principal executive, financial or accounting officer certifying that to the best of such

signer’s knowledge we are in compliance with the indenture and the notes, or else specifying any default.

Form, Exchange and Registration of Transfer

We issued the notes only in fully registered form and without interest coupons.

A holder of notes may have its notes broken into more notes of smaller denominations of not less than €100,000 or combined into fewer notes of larger

denominations, as long as the total principal amount is not changed. This is called an exchange.

A holder of notes may exchange or register a transfer of notes at the office of the trustee. The trustee acts as our agent for registering notes in the names of
holders and registering transfers of notes. We may change this appointment to another entity or perform it ourselves. The entity performing the role of maintaining
the list of registered holders is called the security registrar. It also registers transfers. A holder of notes may also replace lost, stolen or mutilated notes at that office.
The trustee’s agent may require an indemnity before replacing any notes.

A holder of notes is not required to pay a service charge to register a transfer of notes or to exchange notes, but may be required to pay for any tax or other

governmental charge associated with the transfer or exchange. The security registrar makes the registration of transfer or exchange only if it is satisfied with such
holder’s proof of ownership.

We may cancel the designation of any trustee. We may also approve a change in the office through which any trustee acts.

If we redeem less than all of the notes of a particular series, we may block the issuance of, registration of transfer or exchange of notes during the period

beginning 15 days before the day we mail the notice of redemption and ending on the day of that mailing, in order to freeze the list of holders to prepare the
mailing. We may also refuse to register transfers or exchanges of notes selected for redemption, except that we will continue to permit transfers and exchanges of
the unredeemed portion of any note being partially redeemed.

The rules for exchange described above apply to exchange of notes for other notes of the same series and tenor.

Payment and Paying Agents

We pay interest to a holder of notes on each date interest is due if the holder is a direct holder listed in the trustee’s records at the close of business on

the fifteenth calendar day before the next interest payment date, even if such holder no longer owns the note on the interest due date. That particular day is called
the regular record date. Holders buying and selling notes must work out between them how to compensate for the fact that we pay all the interest for an interest
period to the one who is the registered holder on the regular record date.

We pay interest, principal and any other money due on the notes at the office of the trustee in London, UK. That office is currently located at125 Old

Broad Street, Fifth Floor, London EC2N 1AR United Kingdom. A holder of notes must make arrangements to have its payments picked up at or wired from that
office. We may also choose to pay interest by mailing checks.

Street name and other indirect holders should consult their banks or brokers for information on how they may receive payments.

We may also arrange for additional payment offices, and may cancel or change these offices. These offices are called paying agents. We may also choose

to act as our own paying agent. We must notify holders of notes of changes in the paying agents for any particular notes of the series.

13

Notices

We and the trustee send notices regarding the notes only to direct holders, using their addresses as listed in the trustee’s records.

All paying agents must return to us upon our request all money paid by us that remains unclaimed two years after the amount is due to direct holders.

After that two-year period, holders of notes may look only to us for payment and not to the trustee, any other paying agent or anyone else.

Book-Entry System

Upon issuance, the notes of each series are represented by one or more global notes. Each global note is deposited with, or on behalf of, a common

depositary, and registered in the name of the nominee of the common depositary for the accounts of Clearstream and Euroclear.

Investors may elect to hold interests in the global notes held by the depository through Clearstream Banking, société anonyme (“Clearstream”) or
Euroclear Bank S.A./N.V., as operator of the Euroclear System, (“Euroclear”) if they are participants of such systems, or indirectly through organizations that are
participants in such systems. Clearstream and Euroclear hold interests on behalf of their participants through customers’ securities accounts in Clearstream’s and
Euroclear’s names on the books of their respective depositories. Book-entry interests in the notes and all transfers relating to the notes are reflected in the book-
entry records of Clearstream and Euroclear. Because holders acquire, hold and transfer security entitlements with respect to the notes through Clearstream,
Euroclear and their participants, a beneficial holder’s rights with respect to the notes is subject to the laws (including Article 8 of the Uniform Commercial Code)
and contractual provisions governing a holder’s relationship with its securities intermediary and the relationship between its securities intermediary and each other
securities intermediary and between it and us, as the issuer. Except as set forth below, the global notes may be transferred, in whole and not in part, only to another
nominee of the depository or to a successor of the depository or its nominee.

No global note may be exchanged in whole or in part for notes registered, and no transfer of a global note in whole or in part may be registered, in the

name of any person other than the depository or any nominee of the depository unless (i) the depository has notified us that it is unwilling or unable to continue as
depository for such global note or has ceased to be qualified to act as such as required by the indenture, (ii) there has occurred and is continuing an event of default
with respect to the notes or (iii) we determine in our sole discretion at any time that the global note shall be so exchangeable.

Any global note that is exchangeable pursuant to the preceding sentence shall be exchangeable in whole for separate notes in registered form of any

authorized denomination and of like tenor and aggregate principal amount. These notes shall be registered in the name or names of such person or persons as the
depository instructs the trustee. We expect that these instructions would be based upon directions received by the depository from its participants with respect to
ownership of beneficial interests in such global note.

Except in the limited circumstances referred to above, owners of beneficial interests in a global note are not entitled to have such global note registered in

their names, will not receive and are not entitled to receive physical delivery of notes in exchange therefor and are not considered to be the owners or holders of
such global note for any purpose under the notes or the indenture. Accordingly, each person owning a beneficial interest in the global note must rely on the
procedures of the participant through which such person owns its interest to exercise any rights of a holder under the indenture.

The indenture provides that the depository, as a holder, may appoint agents and otherwise authorize participants to give or take any request, demand,

authorization, direction, notice, consent, waiver, or other action which a holder is entitled to give or take under the indenture.

14

Governing Law

The indenture and the notes are governed by, and construed and enforced in accordance with, the laws of the State of New York applicable to agreements

made or instruments entered into and performed in New York State.

Relationship with Trustee

U.S. Bank Trust National Association is the trustee under the indenture. U.S. Bank Trust National Association performs services for us in the ordinary

course of business and serves as the trustee with respect to certain of our other outstanding debt securities.

Open Market Purchases

We may at any time and from time to time purchase notes in the open market or otherwise.

The Paying Agent, Transfer Agent and Security Registrar

Elavon Financial Services DAC is the security registrar and transfer agent with respect to the notes. Elavon Financial Services DAC, UK Branch is the

paying agent with respect to the notes.

15

TERMS FOR
2021 RESTRICTED STOCK UNIT GRANTS
UNDER THE MERCK & CO., 2019 INCENTIVE STOCK PLAN

Exhibit 10.24

This is a summary of the terms applicable to the Restricted Stock Unit (RSU) Award specified in this document.
Different terms may apply to any prior or future RSU Awards.

Grant Type:    RSU - Annual
Grant Date:    May 4, 2021

Vesting Dates        Portion that Vests
May 4, 2022        First: 33.333%
May 4, 2023        Second: 33.333%
May 4, 2024        Third: Balance

Eligibility: Eligibility for grants is determined under the Merck & Co., Inc. 2019 Incentive Stock Plan for employees of the Company, its subsidiaries, its affiliates or its joint
ventures if designated by the Compensation and Benefits Committee of Merck’s Board of Directors, or its delegate (the “Committee”).

I.

GENERAL INFORMATION

IMPORTANT NOTICE: This grant requires you to affirmatively accept it. You MUST log onto the Morgan Stanley website at
(http://www.morganstanley.com/spc/knowledge/managing-equity/managing-your-existing-awards/accepting-awards-grants/) to accept the grant.

Follow the procedure described on the Morgan Stanley website to accept your RSU Award within 90 days. Failure to accept the terms and conditions of your
RSU Award within 90 days may result in Forfeiture of the RSU Award.

A. Restricted Period. The Restricted is the period during which this RSU Award is restricted and subject to forfeiture. The Restricted Period ends with respect
to one-third of this RSU Award on each of the First, Second, and Third anniversaries of the Grant Date as shown in the box above, unless ended earlier
under Article II below. No voting rights apply to this RSU Award. No fractional shares will be awarded: all calculations are subject to rounding.

B. Dividend Equivalents. During the Restricted Period, dividend equivalents will be accrued for the holder (“you”) if and to the extent dividends are paid by
the Company on Merck Common Stock. Payment of such dividends will be made, without interest or earnings, at the time of distribution. If any portion of
this RSU award lapses, is forfeited or expires, no dividend equivalents will be credited or paid on such portion. Any payment of dividend equivalents will be
reduced to the extent necessary for the Company to satisfy any tax or other withholding obligations.

C. Distribution. Upon the expiration of the Restricted Period if you are then employed, you will be entitled to receive a number of shares of Merck common

stock equal to the number of RSUs that have become unrestricted and the dividend equivalents that accrued on that portion. Prior to distribution, you must
deliver to the Company an amount the Company determines to be sufficient to satisfy any amount required to be withheld, including applicable taxes. The
Company may, in its sole discretion, withhold from the RSU Award distribution a number of shares to pay applicable withholding (including taxes).

D.

409A Compliance. Anything to the contrary notwithstanding, no distribution of RSUs may be made unless in compliance with Section 409A of the Internal
Revenue Code or any successor thereto. Specifically, distributions made due to a separation from service (as defined in Section 409A) to a “Specified
Employee” as defined in Treas. Reg. Sec. 1.409A-1(i) or any successor thereto, to the extent required by Section 409A of the Code will not be made until
administratively feasible following the first day of the sixth month following the separation from service, in the same form as they would have been made
had this restriction not applied; provided further, that dividend equivalents that otherwise would have accrued will accrue during the period during which
distribution is suspended.

E. Subject to Recoupment. For employees in Band 600 and above, this RSU Award will be subject to recoupment in the event of certain violations of

Company policy in accordance with the Company’s policy for Recoupment of Compensation for Compliance Violations, as set forth in Appendix A (as may
be amended from time to time).

II.

TERMINATION OF EMPLOYMENT

If your employment with the Company is terminated during the Restricted Period, your right to the RSU Award will be determined according to the terms in this
Section II.

A. General Rule. If your employment is terminated during the Restricted Period for any reason other than those specified in the following paragraphs, the

unvested portion of this RSU Award (and any accrued dividend equivalents) will be forfeited on the date

    
your employment ends. If your employment is terminated as described in this paragraph and you are later rehired by the Company or JV, this grant
nevertheless will expire according to this paragraph notwithstanding such rehire.

B. Sale. If your employment is terminated during the Restricted Period and the Company determines that such termination resulted from the sale of your

subsidiary, division or joint venture, the following portion of your RSU Award and accrued dividend equivalents will be distributed to you at such time as it
would have been paid if your employment had continued: one-third if employment terminates on or after the Grant Date but before the first anniversary
thereof; and all if employment terminates on or after the first anniversary of the Grant Date. The remainder will be forfeited on the date your employment
ends. If your employment is terminated as described in this paragraph and you are later rehired by the Company or JV, this grant nevertheless will expire
according to this paragraph notwithstanding such rehire.

C.

Involuntary Termination. If the company determines that your employment is involuntarily terminated during the Restricted Period but on or after the First
Anniversary, a pro rata portion of your unvested RSU Award and accrued dividend equivalents will be distributed to you at such time as they would have
been paid if your employment had continued. The pro rata portion will equal the full amount of this RSU Award (whether or not vested) times the number of
completed months during the Restricted Period and prior to the date employment terminates, divided by 36; reduced by the number of RSUs that have
vested pursuant to Paragraph A. The remainder and any accrued dividends will be forfeited on the date your employment ends. An “involuntary termination”
includes termination of your employment by the Company as the result of a restructuring or job elimination, but excludes non-performance of your duties
and the reasons listed under paragraphs B, or D through H of this section. If your employment is terminated as described in this paragraph and you are
later rehired by the Company or JV, this grant nevertheless will expire according to this paragraph notwithstanding such rehire.

D. Retirement. If your employment terminates by retirement during the Restricted Period, a pro rata portion of your unvested RSU Award and accrued

dividend equivalents will be distributed to you at such time as they would have been paid if your employment had continued. The pro rata portion will equal
the full amount of this RSU Award (whether or not vested) times the number of completed months during the Restricted Period and prior to the date
employment terminates, divided by 36; reduced by the number of RSUs that have vested pursuant to Paragraph A. The remainder and any accrued
dividends will be forfeited on the date your employment ends. For grantees who are employed in the U.S., “retirement” means a termination of employment
after attaining the earliest of (a) age 55 with at least 10 years of service (b) such age and service that provides eligibility for subsidized retiree medical
coverage or (c) age 65 without regard to years of service. For other grantees, “retirement” is determined by the Company. If your employment is terminated
as described in this paragraph and you are later rehired by the Company or JV, this grant nevertheless will expire according to this paragraph
notwithstanding such rehire.

E. Death. If your employment terminates due to your death during the Restricted Period, all of this RSU Award and accrued dividend equivalents will be

distributed to your estate as soon as possible after your death. If you die during the Restricted Period, but after your employment terminates for the reasons
listed under paragraphs B, C, D, G or H of this section, the remaining, non-forfeited portion of this RSU Award and accrued dividend equivalents will be
distributed to your estate as soon as possible after your death.

F. Misconduct. If your employment is terminated as a result of your deliberate, willful or gross misconduct, this RSU Award and accrued dividend equivalents

will be forfeited immediately upon your receipt of notice of such termination.

G. Disability. If your employment is terminated during the Restricted Period and the Company determines that such termination resulted from inability to

perform the material duties of your role by reason of a physical or mental infirmity that is expected to last for at least six months or to result in your death,
whether or not you are eligible for disability benefits from any applicable disability program, then this RSU Award will continue and be distributable in
accordance with its terms as if employment had continued and will be distributed at the time active RSU Grantees receive distributions with respect to this
RSU Award.

H. Change in Control. If the Company involuntarily terminates your employment during the Restricted Period without Cause before the second anniversary
after the closing of any change in control, then this RSU Award will continue in accordance with its terms as if employment had continued and will be
distributed at the time active RSU Grantees receive distributions with respect to this RSU Award. If this RSU does not remain outstanding following the
change in control and is not converted into a successor RSU, then you will be entitled to receive cash for this RSU in an amount equal to the fair market
value of the consideration paid to Merck stockholders for a share of Merck common stock in the change in control payable within 30 days of the closing of
the change in control. On the second anniversary of the closing of the change in control, this paragraph shall expire. Change in control is defined in the
Merck & Co., Inc. Change in Control Separation Benefits Plan (excluding an MSD Change in Control), but if RSUs are considered “deferred compensation”
under Section 409A of the Internal Revenue Code, the definition of change in control will be modified to the extent necessary to comply with Section 409A.

I.

Joint Venture. Employment with a joint venture or other entity in which the Company has a significant business or ownership interest is not considered
termination of employment for purposes of this RSU Award. Such employment must be approved by, and contiguous with employment by, the Company.
The terms set out in paragraphs A-H above apply to this RSU Award while you are employed by the joint venture or other entity.

III.

TRANSFERABILITY

This RSU Award is not transferable and may not be assigned or otherwise transferred.

IV.

ELECTRONIC ACCEPTANCE

The Company may, in its sole discretion, decide to deliver any documents related to the RSU or future RSUs that may be granted under the Plan by electronic
means or request your consent to participate in the Plan by electronic means. You hereby consent to receive such documents by electronic delivery and agree
to participate in the Plan through an online or electronic system established and maintained by the Company or a third party designated by the Company.

V.

ADMINISTRATION

The Committee is responsible for construing and interpreting this grant, including the right to construe disputed or doubtful plan provisions, and may establish,
amend and construe such rules and regulations as it may deem necessary or desirable for the proper administration of this grant. Any decision or action taken or
to be taken by the Committee, arising out of or in connection with the construction, administration, interpretation and effect of this grant shall, to the maximum
extent permitted by applicable law, be within its absolute discretion (except as otherwise specifically provided herein) and shall be final, binding and conclusive
upon the Company, all eligible employees and any person claiming under or through any eligible employee. All determinations by the Committee including,
without limitation, determinations of the eligible employees, the form, amount and timing of incentives, the terms and provisions of incentives and the writings
evidencing incentives, need not be uniform and may be made selectively among eligible employees who receive, or are eligible to receive, Incentives hereunder,
whether or not such eligible employees are similarly situated.

VI.

GRANTS NOT PART OF THE EMPLOYMENT CONTRACT

Notwithstanding reference to grants of incentives in letters offering employment or in specific employment agreements, incentives do not constitute part of any
employment contract between the Company or JV and the grantee, whether the employment contract arises as a matter of agreement or applicable law. The
value of any grant or of the proceeds of any exercise of incentives are not included in calculating compensation for purposes of pension payments, separation
pay, termination indemnities or other similar payments due upon termination of employment.

This RSU Award is subject to the provisions of the 2019 Incentive Stock Plan. For further information regarding the Long- Term Incentive Program, please
visit the Company intranet Long-Term Incentive homepage.

Appendix A
Recoupment of Compensation for Compliance Violations

POLICIES AND PROCEDURES

Policy
It is the policy of the Compensation and Benefits Committee of the Board of Directors (the “Committee”) that the Committee will exercise its discretion to determine whether to
seek Recoupment of any bonus and/or other incentive compensation paid or awarded to an Affected Employee with respect to any performance period beginning after
December 31, 2013, where it determines, in consultation with the Audit Committee, that: a) the Affected Employee engaged in misconduct, or failed to reasonably supervise an
employee who engaged in misconduct, that resulted in a Material Policy Violation relating to the research, development, manufacturing, sales, or marketing of Company
products; and b) the Committee concludes that the Material Policy Violation caused Significant Harm to the Company, as those terms are defined in this policy. The
Committee’s exercise of its discretion may take into account any considerations determined by the Committee to be relevant.

Definitions
1.

“Recoupment” is defined to include any and all of the following actions to the extent permitted by law: (a) reducing the amount of a current or future bonus or other
cash or non-cash incentive compensation award, (b) requiring reimbursement of a bonus or other cash-based incentive compensation award paid with respect to the
most recently completed performance period, (c) cancelling all or a portion of a future-vesting equity award, (d) cancelling all or a portion of an equity award that
vested within the previous twelve- month period, (e) requiring return of shares paid upon vesting and/or reimbursement of any proceeds received from the sale of an
equity award, in each case that vested within the previous twelve-month period, and (f) any other method of reducing the total compensation paid to an employee for
any prior twelve-month period or any current or future period.

2.

3.

A “Material Policy Violation” is defined as a material violation of a Company policy relating to the research, development, manufacturing, sales, or marketing of
Company products.

An “Affected Employee” is an employee in Band 600 or higher who (i) engaged in misconduct that results in a Material Policy Violation; or (ii) failed in his or her
supervisory responsibilities to reasonably manage or monitor the conduct of an employee who engaged in misconduct that results in a Material Policy Violation.

4.

“Significant Harm” means a significant negative impact on the Company’s financial operating results or reputation.

Procedures
1.

The Committee, acting in consultation with the Audit Committee, shall administer this policy and have full discretion to interpret and to make any and all
determinations under this policy, subject to the approval of the full Board of Directors in the case of a determination to seek or waive Recoupment from the Chief
Executive Officer.

2.

3.

4.

The General Counsel, in consultation with the Chief Ethics and Compliance Officer and the Executive Vice President, Human Resources, is responsible for
determining whether to refer a matter to the Committee for review under this policy and for assisting the Committee with its review. The Committee may consult with
other Board Committees and any external or internal advisors as it deems appropriate.

If the Committee, acting in consultation with the Audit Committee, determines that there is a basis for seeking Recoupment under this policy, the Committee shall
exercise its discretion to determine for each Affected Employee, on an individual basis, and to what extent and in which manner, to seek Recoupment.

In exercising its discretion, the Committee may take into consideration, as it deems appropriate, all of the facts and circumstances of the particular matter and the
general interests of the Company.

Delegation to Management for Certain Recoupment Decisions
The Committee hereby delegates to the Chief Executive Officer (who may further delegate as he deems appropriate) the authority to administer this policy and to make any
and all decisions under it regarding Affected Employees who are not Section 16 Officers of the Company. Section 16 Officers are employees of the Company who are subject
to Section 16 of the Securities Exchange Act of 1934. Management shall report to the Committee on any affirmative decisions to seek Recoupment pursuant to this delegation.

Disclosure of Recoupment Decisions
The Company will comply with all applicable securities laws and regulations, including Securities and Exchange Commission disclosure requirements regarding executive
compensation. The Company may also, but is not obligated to, provide additional disclosure beyond that required by law when the Company deems it to be appropriate and
determines that such disclosure is in the best interest of the Company and its shareholders.

Miscellaneous
Nothing in this policy shall limit or otherwise affect any of the following: 1) management’s ability to take any disciplinary action with respect to any Affected Employee; 2) the
Committee’s ability to use its negative discretion with respect to any incentive compensation performance target at any time; or 3) the Committee’s or management’s ability to
reduce the amount (in whole or in part) of a current or future bonus or other cash or non- cash incentive compensation award to any executive or other employee for any
reason as they may deem appropriate and to the extent permitted by law. Nothing in this policy shall replace or otherwise limit or affect the Clawback Policy for EIP Awards
Upon Significant Restatement of Financial Results and/or the Clawback Policy for PSUs Upon Significant Restatement of Financial Results.

TERMS FOR
2021 NON-QUALIFIED STOCK OPTION (NQSO) GRANTS
UNDER THE MERCK & CO., INC. 2019 INCENTIVE STOCK PLAN

        Exhibit 10.23    

This is a summary of the terms applicable to the stock option specified in this document. Different terms may apply to any prior or future stock option.

Grant Type:     NQSO – Annual
Option Price:    $XX.XX
Grant Date:     May 4, 2021
Expiration Date:    May 3, 2031

Vesting Dates        Portion that Vests
May 4, 2022        First: 33.333%
May 4, 2023        Second: 33.333%
May 4, 2024        Third: Balance

I.

GENERAL INFORMATION

IMPORTANT NOTICE: This grant requires you to affirmatively accept it. You MUST log onto the Morgan Stanley website at:
(http://www.morganstanley.com/spc/knowledge/managing-equity/managing-your-existing-awards/accepting-awards-grants/) to accept the grant.

Follow the procedure described on the Morgan Stanley website to accept your stock option within 90 days. Failure to accept the terms and conditions of your
stock option within 90 days may result in Forfeiture of the stock option.

This stock option becomes exercisable in equal installments (subject to a rounding process) on the Vesting Dates indicated in the accompanying box. This stock
option expires on its Expiration Date, which is the day before the tenth anniversary of the Grant Date. If your employment with the Company is terminated, your
right to exercise this stock option will be determined according to the terms in Section II.

Eligibility: Eligibility for grants is determined under the Merck & Co., Inc. 2019 Incentive Stock Plan for employees of the Company, its subsidiaries, its affiliates
or its joint ventures if designated by the Compensation and Benefits Committee of Merck’s Board of Directors, or its delegate (the “Committee”).

Subject to Recoupment: For employees in Band 600 and above, this Stock Option Award will be subject to recoupment in the event of certain violations of
Company policy in accordance with the Company’s policy for Recoupment of Compensation for Compliance Violations, as set forth in Appendix A (as may be
amended from time to time).

II.

TERMINATION OF EMPLOYMENT

A. General Rule. If your employment is terminated for any reason other than those specified in the following paragraphs, the portion of this stock option

that is unvested will expire on the date your employment ends; the portion of this stock option that is vested will expire unless exercised before the
New York Stock Exchange closes (the “Close of Business”) on the day before the same day of the third month (“Within Three Months”) after the date
of the termination (but in no event after the expiration of the Option Period). Close of Business for any day on which the New York Stock Exchange is
not open means the close of business prior to that date when the Exchange is open. Where there is no corresponding day of a month, the last day of
the month is deemed to be the same day as a later date (e.g., November 28, 29 and 30 all correspond to February 28 in non-leap years). If you are
rehired by the Company or JV, this option nevertheless will expire unless exercised Within Three Months, or the original Expiration Date if earlier.
B. Retirement. If you retire from service with the Company the portion of this stock option that would have become exercisable according to its original
schedule within one year of the date your employment terminates will vest and become exercisable on its applicable Vesting Date and the remainder
will expire immediately. Whether already vested on the date your employment terminates or vested as a result of such retirement, this option will expire
on the earlier of (a) the day before the fifth anniversary of the termination date or (b) its original Expiration Date. For grantees who are employed in the
U.S., “retirement” means a termination of employment after attaining the earliest of (a) age 55 with at least 10 years of service (b) such age and
service that provides eligibility for subsidized retiree medical coverage or (c) age 65 without regard to years of service. For other grantees, “retirement”
is determined by the Company. If your employment is terminated as described in this paragraph and you are later rehired by the Company or JV, this
option nevertheless will expire according to this paragraph notwithstanding such rehire.

C.

Involuntary Termination. If your employment is terminated by the Company and the Company determines that such termination was involuntary,
including the result of a restructuring or job elimination, but excluding non-performance of your duties and the reasons listed under paragraphs B or D
through H, the portion of this stock option that is unvested will expire on the date your employment ends; the portion of this stock option that is vested
will expire on the day before the one year anniversary of the date your employment ends, but in no event later than the original Expiration Date. If your
employment is terminated as described in this paragraph and you are later rehired by the Company or JV, this option nevertheless will expire
according to this paragraph notwithstanding such rehire.

D. Sale. If your employment is terminated and the Company determines that such termination resulted from the sale of your subsidiary, division or joint

venture, the following portion of this stock option award will vest and become exercisable immediately upon such termination: one-third if employment
terminates on or after the Grant Date but before the first anniversary thereof; and all if employment terminates on or after the first anniversary of the
Grant Date. Whether already vested on the date your employment terminates or vested as a result of such sale, this stock option will expire the day
before the first anniversary of the date your employment with the Company ends, but in no event later than the original Expiration Date.
Notwithstanding the foregoing, the Committee may determine, for purposes of this stock option grant, whether employment with an entity that is
established from the Company’s spin off, split off, split up or distribution of equity securities in connection with that entity constitutes a termination of
employment, and may make adjustments, if any, as it deems appropriate, at the time of the distribution of such equity securities, in the kind and/or
number of shares subject to this option, and/or in the option price of such option. If your employment is terminated as described in this paragraph and
you are later rehired by the Company or JV, this option nevertheless will expire according to this paragraph notwithstanding such rehire.

E. Misconduct. If your employment is terminated as a result of your deliberate, willful or gross misconduct, this stock option (whether vested or unvested)

will expire immediately upon your receipt of notice of such termination.

F. Death. If your employment terminates as a result of your death, the portion of this stock option that is unvested will vest immediately upon your death.
Whether already vested on the date of your death or vested as a result of your death, this stock option will expire on the day before the second
anniversary of your death, even if such date is later than the Original Expiration date. This stock option will expire on such earlier date than otherwise
specified in this paragraph as may be required under applicable non-U.S. law (e.g., in France, six months from the date of death). If you die while any
portion of this stock option remains outstanding, but after your employment terminates for the reasons listed under paragraphs B, C, D, G or H of this
section, the portion that remains outstanding after such employment termination will become immediately exercisable and will continue to be
exercisable until the expiration date prescribed in paragraph B, C, D, G or H as applicable (and at least a year from your death in those jurisdictions
where such extension is required by law).

G. Disability. If your employment is terminated and the Company determines that such termination resulted from your inability to perform the material
duties of your role by reason of a physical or mental infirmity that is expected to last for at least six months or to result in your death, whether or not
you are eligible for disability benefits from any applicable disability program, then this stock option will continue to become exercisable on applicable
Vesting Dates and will expire on the earlier of (a) the day before the fifth anniversary of the day your employment terminates and (b) its original
Expiration Date. If your employment is terminated as described in this paragraph and you are later rehired by the Company or JV, this option
nevertheless will expire according to this paragraph notwithstanding such rehire.

H. Change in Control. If the Company involuntarily terminates your employment without Cause before the second anniversary after the closing of a

change in control, each unvested Stock Option that is outstanding immediately prior to the change in control will immediately become fully vested and
exercisable. All options, including options vested prior to such time, will expire on the day before the fifth anniversary of the termination of your
employment following a change in control (but not beyond the Expiration Date). This extended exercise period does not apply in the case of
termination by reasons of retirement, involuntary termination, sale, misconduct, death or disability, as described in paragraphs B through G above or
termination prior to a change in control. If this stock option does not remain outstanding following the change in control and is not converted into a
successor stock option, then you will be entitled to receive cash for this option in an amount at least equal to the difference between the price paid to
stockholders in the change in control and the Option Price of this stock option. A "change in control" has the same meaning that it has under the Merck
& Co., Inc. Change in Control Separation Benefits Plan (excluding an MSD Change in Control).

I.

Joint Venture. Employment with a joint venture or other entity in which the Company has determined that it has a significant business or ownership
interest (a “JV”) is not considered termination of employment for purposes of this stock option. If you transfer employment from the Company to a JV or
from a JV to the Company, such employment must be approved by, and contiguous with employment by, the Company or the JV. The terms set out in
paragraphs A through H above apply to this stock option while the option holder is employed by the JV.

III.

TRANSFERABILITY

This stock option is not transferable and may not be assigned or otherwise transferred except, under specific terms, by executives who hold or who retired within
the prior 12 months from a Section 16 officer position.

IV.

ELECTRONIC ACCEPTANCE
The Company may, in its sole discretion, decide to deliver any documents related to the stock option or future options that may be granted under the Plan by
electronic means or request your consent to participate in the Plan by electronic means. You hereby consent to receive such documents by electronic delivery
and agree to participate in the Plan through an online or electronic system established and maintained by the Company or a third party designated by the
Company.

V.

ADMINISTRATION

The Committee is responsible for construing and interpreting this grant, including the right to construe disputed or doubtful plan provisions, and may establish,
amend and construe such rules and regulations as it may deem necessary or desirable for the proper administration of this grant. Any decision or action taken or
to be taken by the Committee, arising out of or in connection with the construction, administration, interpretation and effect of this grant shall, to the maximum
extent permitted by applicable law, be within its absolute discretion (except as otherwise specifically provided herein) and shall be final, binding and conclusive
upon the Company, all eligible employees and any person claiming under or through any eligible employee. All determinations by the Committee including,
without limitation, determinations of the eligible employees, the form, amount and timing of incentives, the terms and provisions of incentives and the writings
evidencing incentives, need not be uniform and may be made selectively among eligible employees who receive, or are eligible to receive, Incentives hereunder,
whether or not such eligible employees are similarly situated.

VI.

GRANTS NOT PART OF EMPLOYMENT CONTRACT

Notwithstanding reference to grants of incentives in letters offering employment or in specific employment agreements, incentives do not constitute part of any
employment contract between the Company or JV and the grantee, whether the employment contract arises as a matter of agreement or applicable law. The
value of any grant or of the proceeds of any exercise of Incentives are not included in calculating compensation for purposes of pension payments, separation
pay, termination indemnities or other similar payments due upon termination of employment.

This stock option is subject to the provisions of the 2019 Incentive Stock Plan. For further information regarding the Long- Term Incentive Program, please
visit the Company intranet Long-Term Incentive homepage.

Appendix A
Recoupment of Compensation for Compliance Violations

POLICIES AND PROCEDURES

Policy
It is the policy of the Compensation and Benefits Committee of the Board of Directors (the “Committee”) that the Committee will exercise its discretion to determine whether to
seek Recoupment of any bonus and/or other incentive compensation paid or awarded to an Affected Employee with respect to any performance period beginning after
December 31, 2013, where it determines, in consultation with the Audit Committee, that: a) the Affected Employee engaged in misconduct, or failed to reasonably supervise an
employee who engaged in misconduct, that resulted in a Material Policy Violation relating to the research, development, manufacturing, sales, or marketing of Company
products; and b) the Committee concludes that the Material Policy Violation caused Significant Harm to the Company, as those terms are defined in this policy. The
Committee’s exercise of its discretion may take into account any considerations determined by the Committee to be relevant.

Definitions
1.

Procedures
1.

2.

3.

4.

2.

3.

4.

“Recoupment” is defined to include any and all of the following actions to the extent permitted by law: (a) reducing the amount of a current or future bonus or other
cash or non- cash incentive compensation award, (b) requiring reimbursement of a bonus or other cash-based incentive compensation award paid with respect to the
most recently completed performance period, (c) cancelling all or a portion of a future-vesting equity award, (d) cancelling all or a portion of an equity award that
vested within the previous twelve-month period, (e) requiring return of shares paid upon vesting and/or reimbursement of any proceeds received from the sale of an
equity award, in each case that vested within the previous twelve-month period, and (f) any other method of reducing the total compensation paid to an employee for
any prior twelve- month period or any current or future period.
A “Material Policy Violation” is defined as a material violation of a Company policy relating to the research, development, manufacturing, sales, or marketing of
Company products.
An “Affected Employee” is an employee in Band 600 or higher who (i) engaged in misconduct that results in a Material Policy Violation; or (ii) failed in his or her
supervisory responsibilities to reasonably manage or monitor the conduct of an employee who engaged in misconduct that results in a Material Policy Violation.
“Significant Harm” means a significant negative impact on the Company’s financial operating results or reputation.

The Committee, acting in consultation with the Audit Committee, shall administer this policy and have full discretion to interpret and to make any and all
determinations under this policy, subject to the approval of the full Board of Directors in the case of a determination to seek or waive Recoupment from the Chief
Executive Officer.
The General Counsel, in consultation with the Chief Ethics and Compliance Officer and the Executive Vice President, Human Resources, is responsible for
determining whether to refer a matter to the Committee for review under this policy and for assisting the Committee with its review. The Committee may consult with
other Board Committees and any external or internal advisors as it deems appropriate.
If the Committee, acting in consultation with the Audit Committee, determines that there is a basis for seeking Recoupment under this policy, the Committee shall
exercise its discretion to determine for each Affected Employee, on an individual basis, whether, and to what extent and in which manner, to seek Recoupment.
In exercising its discretion, the Committee may take into consideration, as it deems appropriate, all of the facts and circumstances of the particular matter and the
general interests of the Company.

Delegation to Management for Certain Recoupment Decisions
The Committee hereby delegates to the Chief Executive Officer (who may further delegate as he deems appropriate) the authority to administer this policy and to make
any and all decisions under it regarding Affected Employees who are not Section 16 Officers of the Company. Section 16 Officers are employees of the Company who are
subject to Section 16 of the Securities Exchange Act of 1934. Management shall report to the Committee on any affirmative decisions to seek Recoupment pursuant to
this delegation.

Disclosure of Recoupment Decisions
The Company will comply with all applicable securities laws and regulations, including Securities and Exchange Commission disclosure requirements regarding executive
compensation. The Company may also, but is not obligated to, provide additional disclosure beyond that required by law when the Company deems it to be appropriate
and determines that such disclosure is in the best interest of the Company and its shareholders.

Miscellaneous
Nothing in this policy shall limit or otherwise affect any of the following: 1) management’s ability to take any disciplinary action with respect to any Affected Employee; 2)
the Committee’s ability to use its negative discretion with respect to any incentive compensation performance target at any time; or 3) the Committee’s or management’s
ability to reduce the amount (in whole or in part) of a current or future bonus or other cash or non-cash incentive compensation award to any executive or other employee
for any reason as they may deem appropriate and to the extent permitted by law. Nothing in this policy shall replace or otherwise limit or affect the Clawback Policy for EIP
Awards Upon Significant Restatement of Financial Results and/or the Clawback Policy for PSUs upon Significant Restatement of Financial Results.

    The following is a list of subsidiaries of the Company, doing business under the name stated.

MERCK & CO., INC. SUBSIDIARIES
as of 12/31/2020

Exhibit 21

Name

7728026 Canada Inc.

Abmaxis Inc.

Afferent Pharmaceuticals, Inc.

Agrident GmbH

Agro Verhen B.V.

Aleis Pty Ltd

Allflex Argentina S.A.

Allflex Australia Pty. Ltd.

Allflex Avrasya Hayvan Kimlik Sistemleri Sanayi Ve Ticaret Limited Sirketi

Allflex dan-mark ApS

Allflex Europe S.A.S.

Allflex Group Germany GmbH

Allflex India Private Limited

Allflex International do Brasil Ltda

Allflex Maroc S.A.R.L.

Allflex New Zealand Limited

Allflex Polska Spolka z ograniczona odpowiedzialnoscia

Allflex SCR Vostok

Allflex Services S.A.R.L.

Allflex UK Group Limited

Allflex USA, Inc.

Alta Plastic Muhendislik Sanayi Ve Ticaret Limited Sirketi

Animal ID Australia Pty Ltd

Antelliq Corporation

Antelliq Finance, Inc.

Antelliq Holdings France S.A.S

Antelliq Holdings, Inc.

Antelliq Management, Inc.

Country or State

of Incorporation

Canada

Delaware

Delaware

Germany

Netherlands

Australia

Argentina

Australia

Turkey

Denmark

France

Germany

India

Brazil

Morocco

New Zealand

Poland

Belarus

France

United Kingdom

Delaware

Turkey

Australia

Delaware

Delaware

France

Delaware

Delaware

Antimicrobial Stewardship LLC

ArQule, Inc.

AVL Holdings Limited

Delaware

Delaware

United Kingdom

1

Beijing Allflex Plastic Products Co. Ltd

China

Beijing Protection Science and Technology Co., Ltd.

People’s Republic of China

Biomark, Inc.

BRC Ltd.

Burgwedel Biotech GmbH

Calporta Therapeutics, Inc.

Idaho

Bermuda

Germany

Delaware

Cambridge Resonant Technologies Ltd

United Kingdom

Canji, Inc.

cCam Biotherapeutics Ltd.

Cherokee Pharmaceuticals LLC

Chevillot S.A.S.

Delaware

Israel

Delaware

France

Continuum Professional Services Limited

United Kingdom

Controladora MSD Mexicana Sociedad de Responsabilidad Limitada de Capital Variable

Mexico

Cooper Veterinary Products (Proprietary) Limited

Corporation Allflex, Inc.

Cosmas B.V.

Cubist (UK) Ltd

Cubist Pharmaceuticals (UK) Ltd.

Cubist Pharmaceuticals LLC

Dashtag

Desarrollos Farmaceuticos Y Cosmeticos, S.A.

Destron Fearing Corporation

Dialstat Trading 91 Pty Ltd T/A Allflex SA

Dieckmann Arzneimittel GmbH

Digital Angel S.A.

Diosynth France S.A.S.

Diosynth Holding B.V.

Diosynth Produtos Farmo-quimicos Ltda.

Drovers ID Pty Ltd

DSD Holding A/S

Elastec S.R.L

Essex Pharmaceuticals, Inc.

South Africa

Canada

Netherlands

United Kingdom

United Kingdom

Delaware

United Kingdom

Spain

Delaware

South Africa

Germany

Digital Angel S.A.

France

Netherlands

Brazil

Australia

Denmark

Argentina

Philippines

Essexfarm, S.A.

Farmacox - Companhia Farmaceutica, Lda

Farmasix-Produtos Farmaceuticos, Lda

Financiere MSD

Fontelabor-Produtos Farmaceuticos, Lda.

Ecuador

Portugal

Portugal

France

Portugal

2

Frosst Laboratories, Inc.

Frosst Portuguesa - Produtos Farmaceuticos, Lda.

Fulford (India) Limited

1

GlycoFi, Inc.

GT Acquisition Sub, Inc.

GTS FI B.V.

Hangzhou MSD Pharmaceutical Co., Ltd.

1

Harrisvaccines, Inc.

Hawk and Falcon L.L.C.

Healthcare Services and Solutions, LLC

Heptafarma Companhia Farmaceutica, Lda

Hydrochemie GmbH

Idenix GmbH

Idenix SARL

IdentiGEN Canada Ltd.

IdentiGEN Czech s.r.o.

IdentiGEN Deutschland GmbH

IdentiGEN Limited

IdentiGEN North America Inc.

IdentiGEN Switzerland AG

Immune Design B.V.

Immune Design Corp.

Insight Acquisition Holdings Limited

International Indemnity Ltd.

Intervet (Ireland) Limited

Intervet (Israel) Ltd.

Intervet (M) Sdn. Bhd.

Intervet (Proprietary) Limited

Intervet (Thailand) Ltd.

Intervet AB

Intervet Agencies B.V.

Delaware

Portugal

India

Delaware

Minnesota

Netherlands

China

Iowa

Delaware

Delaware

Portugal

Germany

Switzerland

France

Canada

Czech Republic

Germany

Ireland

Delaware

Switzerland

Netherlands

Delaware

Ireland

Bermuda

Ireland

Israel

Malaysia

South Africa

Thailand

Sweden

Netherlands

Intervet Animal Health Taiwan Limited

Republic of China

Intervet Argentina S.A.

Intervet Australia Pty Limited

Intervet Canada Corp.

Intervet Central America S. de R.L.

Intervet Deutschland GmbH

Intervet Ecuador S.A.

Argentina

Australia

Canada

Panama

Germany

Ecuador

3

Intervet Egypt for Animal Health SAE

Intervet GesmbH

Intervet Hellas A.E.

Intervet Holding B.V.

Intervet Holdings France SAS

Intervet Hungaria Értékesítő Kft

Intervet Inc.

Intervet India Pvt Limited

Intervet International B.V.

Intervet International GmbH

Intervet International Sarl

Intervet LLC

Intervet Maroc S.A.

Intervet Mexico S.A. de C.V.

Intervet Middle East Limited

Intervet Nederland B.V.

Intervet Philippines, Inc.

Intervet Productions S.A.

Intervet Productions S.r.l.

Intervet Romania SRL

Intervet S.A.

Intervet SAS

Intervet Schering-Plough Animal Health Pty. Ltd.

Intervet South Africa (Proprietary) Limited

Intervet Sp. z.o.o.

Intervet UK Production Limited

Intervet Venezolana S.A.

Intervet Veterinaria Chile Ltda

Intervet Veteriner Ilaclari Pazarlama ve Ticaret Ltd. Sirketi

Intervet, s.r.o.

Interveterinaria SA de CV

IOmet Pharma Limited

Egypt

Austria

Greece

Netherlands

France

Hungary

Delaware

India

Netherlands

Germany

France

Russian Federation

Morocco

Mexico

Cyprus

Netherlands

Philippines

France

Italy

Romania

Peru

France

Australia

South Africa

Poland

United Kingdom

Venezuela

Chile

Turkey

Czech Republic

Mexico

United Kingdom

Laboratoires Merck Sharp & Dohme-Chibret

Laboratorios Abello, S.A.

Laboratorios Chibret, S.A.

Laboratorios Frosst, S.A.

Laboratorios Quimico-Farmaceuticos Chibret, Lda

Lemifar S. A.

France

Spain

Spain

Spain

Portugal

Uruguay

4

Maple Leaf Holdings GmbH

Maya Tibbi Urunler Ticaret Limited Sirketi

MCM Vaccine B.V.

1

Med-Nim (Proprietary) Limited

Merck and Company, Incorporated

Merck Canada Inc.

Merck Capital Ventures, LLC

1

Merck Frosst Canada & Co.

Merck Frosst Company

Merck Global Health Innovation Fund, LLC

Merck Global Health Innovation, Private Equity, LLC

Merck HDAC Research, LLC

Merck Holdings II Corp.

Merck Holdings III Corp.

Merck Holdings IV Corp.

Merck Holdings LLC

Merck International Holdings Corp.

Merck Lumira Biosciences Fund L.P.

1

Merck Registry Holdings, Inc.

Merck Research Investments LLC

Merck Research Laboratories Massachusetts, LLC

Merck Sharp & Dohme (Argentina) LLC

Merck Sharp & Dohme (Asia) Limited

Merck Sharp & Dohme (Australia) Pty. Limited

Merck Sharp & Dohme (Chile) Ltda.

Merck Sharp & Dohme (China) Limited

Merck Sharp & Dohme (Enterprises) B.V.

Merck Sharp & Dohme (Europe) Inc.

Merck Sharp & Dohme (Holdings) Pty Ltd

Merck Sharp & Dohme (I.A.) LLC

Merck Sharp & Dohme (International) Limited

Merck Sharp & Dohme (Israel - 1996) Company Ltd.

Switzerland

Turkey

Netherlands

South Africa

Delaware

Canada

Delaware

Canada

Canada

Delaware

Delaware

Delaware

Delaware

Delaware

Delaware

Delaware

Delaware

Canada

New Jersey

Delaware

Delaware

Delaware

Hong Kong

Australia

Chile

Hong Kong

Netherlands

Delaware

Australia

Delaware

Bermuda

Israel

Merck Sharp & Dohme (Malaysia) SDN. BHD.

Merck Sharp & Dohme (New Zealand) Limited

Merck Sharp & Dohme (Sweden) A.B.

Merck Sharp & Dohme (Switzerland) GmbH

Merck Sharp & Dohme (UK) Limited

Merck Sharp & Dohme Animal Health, S.L.

Malaysia

New Zealand

Sweden

Switzerland

United Kingdom

Spain

5

Merck Sharp & Dohme Asia Pacific Services Pte. Ltd.

Merck Sharp & Dohme B.V.

Merck Sharp & Dohme BH d.o.o.

Merck Sharp & Dohme Bulgaria EOOD

Merck Sharp & Dohme Colombia S.A.S.

Merck Sharp & Dohme Comercializadora, S. de R.L. de C.V.

Merck Sharp & Dohme Corp.

Merck Sharp & Dohme Cyprus Limited

Merck Sharp & Dohme d.o.o.

Merck Sharp & Dohme d.o.o. Belgrade

Merck Sharp & Dohme de Espana SAU

Merck Sharp & Dohme Farmaceutica Ltda.

Singapore

Netherlands

Bosnia

Bulgaria

Colombia

Mexico

New Jersey

Cyprus

Croatia

Serbia

Spain

Brazil

Merck Sharp & Dohme Finance Europe Limited

United Kingdom

Merck Sharp & Dohme Gesellschaft m.b.H.

Merck Sharp & Dohme IDEA GmbH

Merck Sharp & Dohme inovativna zdravila d.o.o.

Merck Sharp & Dohme International Services B.V.

Merck Sharp & Dohme Latvija

Merck Sharp & Dohme Limitada

Merck Sharp & Dohme LLC

Merck Sharp & Dohme Manufacturing Unlimited Company

Merck Sharp & Dohme OU

Merck Sharp & Dohme Peru SRL

Merck Sharp & Dohme Pharmaceutical Industrial and Commercial Societe Anonyme

Merck Sharp & Dohme Research GmbH

Merck Sharp & Dohme Romania SRL

Merck Sharp & Dohme S.A.

Merck Sharp & Dohme s.r.o.

Merck Sharp & Dohme Salud Animal Columbia S.A.S.

Merck Sharp & Dohme Saude Animal Ltda.

Merck Sharp & Dohme Singapore Trading Pte. Ltd.

Merck Sharp & Dohme Tunisie SARL

Austria

Switzerland

Slovenia

Netherlands

Latvia

Bolivia

New Jersey

Ireland

Estonia

Peru

Greece

Switzerland

Romania

Morocco

Czech Republic

Colombia

Brazil

Singapore

Tunisia

Merck Sharp & Dohme, Limitada

Merck Sharp & Dohme, S. de R.L. de C.V.

Merck Sharp & Dohme, s.r.o.

Merck Sharp Dohme Ilaclari Limited Sirketi

Merck Teknika LLC

Merko Acquisition S.A.

Portugal

Mexico

Slovakia

Turkey

Delaware

Belgium

6

Merko B.V.

Merko Dalton B.V.

Merko N.V.

ML Holdings (Canada) Inc.

MRL San Francisco, LLC

MRL Ventures Fund LLC

MSD (I.A.) B.V.

MSD (L-SP) Unterstützungskasse GmbH

MSD (Ningbo) Animal Health Technology Co., Ltd.

MSD (Nippon Holdings) B.V.

MSD (Norge) AS

MSD (Proprietary) Limited

MSD (Shanghai) Pharmaceuticals Consultancy Co., Ltd.

MSD (Thailand) Ltd.

MSD AH Limited

MSD Animal Health (Phils.), Inc

MSD Animal Health (Shanghai) Trading Co., Ltd.

MSD Animal Health A/S

MSD Animal Health B.V.

MSD Animal Health Danube Biotech GmbH

MSD Animal Health FZ-LLC

MSD Animal Health GmbH

MSD Animal Health Innovation AS

MSD Animal Health Innovation GmbH

MSD Animal Health Innovation Pte. Ltd.

MSD Animal Health Innovation SAS

MSD Animal Health K.K.

MSD Animal Health Korea Ltd.

MSD Animal Health Norge AS

MSD Animal Health Oy

MSD Animal Health Pension Trustee Limited

MSD Animal Health S.r.l.

Netherlands

Netherlands

Belgium

Canada

Delaware

Delaware

Netherlands

Germany

China

Netherlands

Norway

South Africa

China

Thailand

United Kingdom

Philippines

China

Denmark

Belgium

Austria

United Arab Emirates

Switzerland

Norway

Germany

Singapore

France

Japan

Korea, Republic of

Norway

Finland

United Kingdom

Italy

MSD Animal Health UK Ltd.

MSD Animal Health Vietnam Co. Limited

MSD Animal Health, Lda.

MSD Argentina Holdings B.V.

MSD Argentina SRL

MSD Asia Holdings Pte. Ltd.

United Kingdom

Viet Nam

Portugal

Netherlands

Argentina

Singapore

7

MSD Belgium BV - SRL

MSD Biotech B.V.

MSD Brazil Investments B.V.

MSD Central America Services S. de R.L.

MSD China (Investments) B.V.

MSD China B.V.

MSD China Holding Co., Ltd.

MSD Cubist Holdings Unlimited Company

MSD Czech Republic s.r.o.

MSD Danmark ApS

MSD Egypt LLC

MSD EIC Unlimited Company

MSD Eurofinance

MSD Farmaceutica C.A.

MSD FI BV

MSD Finance 2 LLC

MSD Finance B.V.

MSD Finance Company

MSD Finance Holdings Unlimited Company

MSD Finland Oy

MSD France

MSD Global Research GmbH

MSD HH Vietnam Ltd

MSD Holdings (Ireland) Unlimited Company

MSD Holdings 2 G.K.

MSD Holdings G.K.

MSD Human Health Holding B.V.

MSD Human Health Holding II B.V.

MSD IDEA Pharmaceuticals Nigeria Limited

MSD IDEA Tunisie SARL

MSD Idenix Holdings Unlimited Company

MSD Innovation & Development GmbH

Belgium

Netherlands

Netherlands

Panama

Netherlands

Netherlands

China

Ireland

Czech Republic

Denmark

Egypt

Ireland

Bermuda

Venezuela

Netherlands

Delaware

Netherlands

Bermuda

Ireland

Finland

France

Switzerland

Vietnam

Ireland

Japan

Japan

Netherlands

Netherlands

Nigeria

Tunisia

Ireland

Switzerland

MSD International Business GmbH

MSD International Finance B.V.

MSD International Finance LLC

MSD International GmbH

MSD International Holdings 2 B.V.

MSD International Investment Holdings Unlimited Company

Switzerland

Netherlands

Delaware

Switzerland

Netherlands

Ireland

8

MSD International Manufacturing GmbH

MSD Investment Holdings (Ireland) Unlimited Company

MSD Investments (Holdings) GmbH

MSD Italia s.r.l.

MSD Japan Holdings B.V.

MSD Japan Holdings GK

MSD K.K.

MSD Korea Co., Ltd.

MSD Laboratories India LLC

MSD Latin America Services S. de R.L.

MSD Latin America Services S. de R.L. de C.V.

MSD Limited

MSD Luxembourg S.a.r.l.

MSD Merck Sharp & Dohme AG

MSD NL 4 B.V.

MSD Overseas Manufacturing Co (Ireland) Unlimited Company

MSD Panama International Services S. de R.L.

MSD Participations B.V.

MSD Pharma (Singapore) Pte. Ltd.

MSD Pharma GmbH

MSD Pharma Hungary Korlatolt Felelossegu Tarsasag

MSD Pharmaceuticals Holdings Unlimited Company

MSD Pharmaceuticals Investments 1 Unlimited Company

MSD Pharmaceuticals Investments 3 Unlimited Company

MSD Pharmaceuticals Ireland Unlimited Company

MSD Pharmaceuticals LLC

MSD Pharmaceuticals Private Limited

MSD Polska Dystrybucja Sp. z.o.o.

MSD Polska Sp.z.o.o.

MSD R&D (China) Co., Ltd.

MSD R&D Innovation Centre Limited

MSD RDC Costa Rica Sociedad de Responsabilidad Limitada

Switzerland

Ireland

Switzerland

Italy

Netherlands

Japan

Japan

Korea

Delaware

Panama

Mexico

United Kingdom

Luxembourg

Switzerland

Netherlands

Ireland

Panama

Netherlands

Singapore

Germany

Hungary

Ireland

Ireland

Ireland

Ireland

Russian Federation

India

Poland

Poland

China

United Kingdom

Cost Rica

MSD Regional Business Support Center GmbH

MSD Registry Holdings, Inc.

MSD Shared Business Services EMEA Limited

MSD Sharp & Dohme Gesellschaft mit beschränkter Haftung

MSD Switzerland Investments 1 Unlimited Company

MSD Switzerland Investments 4 Unlimited Company

Germany

New Jersey

Ireland

Germany

Ireland

Ireland

9

MSD Switzerland Investments 5 Unlimited Company

MSD Ukraine Limited Liability Company

MSD Unterstutzungskasse GmbH

MSD Vaccines Limited

MSD Vaccins

MSD Vaccins Holdings

MSD Venezuela Holding GmbH

MSD Ventures (Ireland) Unlimited Company

MSD Verwaltungs GmbH

MSD Vietnam Company Limited

MSD Vietnam Holdings B.V.

MSD Vostok B.V.

MSDIG Holdings Limited

MSDRG Holdings Unlimited Company

MSDRG LLC

MSP Singapore - Sub, LLC

MSP Singapore Company, LLC

MSP Vaccine Company

1

Multilan AG

N.V. Organon

Nihon MSD G.K.

Nourifarma - Produtos Quimicos e Farmaceuticos, Sociedade Uniperssoal, Lda

O.PI.VI S.R.L.

OBS Holdings B.V.

OBS Human Health Holding B.V.

OBS International 9 B.V.

OBS Mexico Holdings B.V.

Oncoethix GmbH

OncoImmune, Inc.

Optimer Pharmaceuticals LLC

Organon – Ecuador S.A.

Organon & Co.

Ireland

Ukraine

Germany

United Kingdom

France

France

Switzerland

Ireland

Germany

Vietnam

Netherlands

Netherlands

Ireland

Switzerland

Delaware

Delaware

Delaware

Pennsylvania

Switzerland

Netherlands

Japan

Portugal

Italy

Netherlands

Netherlands

Netherlands

Netherlands

Switzerland

Delaware

Delaware

Ecuador

Delaware

Organon (I.A.) B.V.

Organon (India) Private Limited

Organon (Ireland) Ltd

Organon (Philippines) Incorporated

Bulgaria

India

Ireland

Philippines

Organon (Shanghai) Pharmaceutical Technology Co., Ltd.

Peoples Republic of China

Organon (Thailand) Ltd.

Thailand

10

Organon Agencies B.V.

Organon Argentina Holdings B.V.

Organon Argentina S.R.L.

Organon Asia Holdings B.V.

Organon Asia Pacific Services Pte. Ltd.

Organon Austria GmbH

Organon Belgium BV

Organon BH d.o.o.

Organon BioSciences International B.V.

Organon BioSciences Peru S.R.L.

Organon BioSciences S.R.L.

Organon BioSciences Ventures B.V.

Organon Canada Holdings BV

Organon Canada Holdings LLC

Organon Canada Inc.

Organon Central East GmbH

Organon Chile SPA

Organon China B.V.

Organon Colombia S.A.S.

Organon Comercializadora, S. de R.L. de C.V.

Organon Czech Republic s.r.o.

Organon Denmark ApS

Organon Dominicana S.A.

Organon Egypt Ltd

Organon Finance 1 LLC

Organon Finance Inc.

Organon Finland Oy

Organon France

Organon Global Inc.

Organon GmbH

Organon Healthcare GmbH

Organon Holding I B.V.

Netherlands

Argentina

Argentina

Netherlands

Singapore

Austria

Belgium

Bosnia and Herzegovina

Netherlands

Peru

Romania

Netherlands

Netherlands

Delaware

Canada

Switzerland

Chile

Netherlands

Colombia

Mexico

Czech Republic

Denmark

Dominican Republic

Egypt

Delaware

Delaware

Finland

France

Delaware

Switzerland

Germany

Netherlands

Organon Holdings 9 B.V.

Organon Hong Kong Limited

Organon International GmbH

Organon International Holdings 9 B.V.

Organon International Holdings B.V.

Organon International Services GmbH

Netherlands

Hong Kong

Switzerland

Netherlands

Netherlands

Switzerland

11

Organon Ireland Holdings B.V.

Organon Italia S.r.l.

Organon Japan Holdings B.V.

Organon Japan Holdings G.K.

Organon K.K.

Organon Korea Co. Ltd.

Organon KSA GmbH

Organon Laboratories Ltd

Organon Latin America S.A.

Organon Latin America Services S. de R.L.

Organon Limited Liability Company

Organon LLC

Organon Malaysia Sdn. Bhd.

Organon Maroc S.A.R.L.

Organon Middle East S.A.L.

Organon New Zealand Limited

Organon Norway AS

Organon Participations B.V.

Organon Pharma (Ireland) Limited

Organon Pharma (UK) Limited

Organon Pharma B.V.

Organon Pharma Costa Rica S.R.L.

Organon Pharma d.o.o.

Organon Pharma d.o.o. Beograde

Organon Pharma FZ-LLC

Organon Pharma Holdings LLC

Organon Pharma Israel Ltd.

Organon Pharma Pty Ltd

Organon Pharma S. de R.L.

Organon Pharmaceutical Egypt LLC

Organon Polska Sp. zo.o.

Organon Portugal Sociedade Unipessoal Lda

Netherlands

Italy

Netherlands

Japan

Japan

Korea (the Republic of)

Switzerland

United Kingdom

Uruguay

Panama

Russian Federation

Delaware

Malaysia

Morocco

Lebanon

New Zealand

Norway

Netherlands

Ireland

United Kingdom

Netherlands

Costa Rica

Croatia

Serbia

United Arab Emirates

Delaware

Israel

Australia

Panama

Egypt

Poland

Portugal

Organon Puerto Rico LLC

Organon Salud, S.L.

Organon Singapore Pte. Ltd.

Organon Slovakia s.r.o.

Organon South Africa (Pty) Ltd

Organon Sweden AB

Puerto Rico

Spain

Singapore

Slovakia

South Africa

Sweden

12

Organon Trade LLC

Organon Turkey Ilaclari Limited Sirketi

Organon Ukraine Limited Liability Company

Organon USA LLC

OS ID AS

OS ID Hellas M.I.K.E

P.T. Merck Sharp & Dohme Indonesia

Parlanca Limited

Peloton Therapeutics, Inc.

Pentair Iceland Holdings ehf.

Pentair Chile SpA

Peocon ehf.

Pixobot, Inc.

Polnet ID Spolka z ograniczona odpowiedzialnoscia

Productos Famaceuticos Organon, S. de R.L. de C.V.

Prondil Sociedad Anónima

PT Intervet Indonesia

PT Merck Sharp Dohme Pharma Tbk

 1

Putexin Investments Limited

Rigontec GmbH

Rigontec, Inc.

Rosetta Biosoftware UK Limited

Rosetta Inpharmatics LLC

S.C. Allflex Romania S.R.L.

S.C.R. (Engineers) Limited

Schering-Plough

Schering-Plough (India) Private Limited

Schering-Plough (Ireland) Unlimited Company

Schering-Plough Animal Health Limited

Schering-Plough Bermuda Ltd.

Schering-Plough Canada Inc.

Schering-Plough Corporation

Delaware

Turkey

Ukraine

New Jersey

Norway

Greece

Indonesia

Ireland

Delaware

Iceland

Chile

Iceland

Delaware

Poland

Mexico

Uruguay

Indonesia

Indonesia

New Zealand

Germany

Delaware

United Kingdom

Delaware

Romania

Israel

France

India

Ireland

New Zealand

Bermuda

Canada

Philippines

Schering-Plough Corporation, U.S.A.

Schering-Plough del Peru S.A.

Schering-Plough Holdings Limited

Schering-Plough Indústria Farmacêutica Ltda.

Schering-Plough Labo NV

Schering-Plough Limited

Delaware

Peru

United Kingdom

Brazil

Belgium

United Kingdom

13

Schering-Plough S.A.

Schering-Plough S.A.

Schering-Plough S.A.

Schering-Plough S.A.

Schering-Plough S.A. de C.V.

Schering-Plough Sante Animale

SCR Allflex Management, Ltd

SCR Dairy, Inc.

SCR Europe S.R.L.

SCR Monitoring Mexico, S. de R.L. de C.V.

Sentipharm AG

Servicios Organon S. de R.L. de C.V.

Servicios Veterniarios Servet, Sociedad Anónima

Shanghai MSD Pharmaceutical Trading Co., Ltd.

Sistemas de Identificacao Animal Ltda

SmartCells, Inc.

SOL Limited

S-P Ril Ltd.

S-P Veterinary Holdings Limited

S-P Veterinary Limited

Stallmastaren AB

SureFlap (NZ) Limited

SureFlap Limited

SureFlap LLC

Tag ID Investments, Inc.

Theriak B.V.

Tilos Therapeutics, Inc.

Trius Therapeutics LLC

UAB Merck Sharp & Dohme

Undra, S.A. de C.V.

Vaki A/S

Vaki Aquaculture Systems ehf.

Panama

Paraguay

Spain

Uruguay

Mexico

France

Israel

Delaware

Italy

Mexico

Switzerland

Brazil

Costa Rica

China

Brazil

Delaware

Bermuda

United Kingdom

United Kingdom

United Kingdom

Sweden

New Zealand

United Kingdom

Florida

Delaware

Netherlands]

Delaware

Delaware

Lithuania

Mexico

Norway

Iceland

Vaki Chile Limitada

Vaki Scotland Ltd

Vallée S.A.

1

VelosBio Inc.

Venco Farmaceutica S.A.

Venco Holding GmbH

Chile

United Kingdom

Brazil

Delaware

Venezuela

Switzerland

14

Vet Pharma Friesoythe GmbH

Veterinaria Premium, Sociedad Anonima

VetInvent, LLC

Vetrex B.V.

Vetrex Egypt L.L.C.

Vilsan Veteriner Ilaclari Ticaret ve Sanayi Anonim Sirketi

Viralytics Limited

Vocaltag Ltd.

Vree Health Italia S.r.l.

Vree Health Ltd.

Werthenstein Biopharma GmbH

Zoöpharm B.V.

___________

1

 own less than 100%

15

Germany

Guatemala

Delaware

Netherlands

Egypt

Turkey

Australia

Israel

Italy

United Kingdom

Switzerland

Netherlands

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-224016 and 333-224017) and on Form S-8 (Nos. 333-
173025, 333-173024, 333-162883, 333-162884, 333-162885, 333-162886, 333-121089, and 333-233226) of Merck & Co., Inc. of our report dated February 25,
2021 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

Exhibit 23

/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Florham Park, New Jersey
February 25, 2021

POWER OF ATTORNEY

Each of the undersigned does hereby appoint JENNIFER ZACHARY as his/her true and lawful attorney to execute on behalf of the undersigned (whether on
behalf of the Company, or as an officer or director thereof, or by attesting the seal of the Company, or otherwise) the Annual Report on Form 10-K of Merck &
Co.,  Inc.  for  the  fiscal  year  ended  December  31,  2020  under  the  Securities  Exchange  Act  of  1934,  including  amendments  thereto  and  all  exhibits  and  other
documents in connection therewith.

IN WITNESS WHEREOF, this instrument has been duly executed as of the 25  day of February 2021.

th

Exhibit 24.1

MERCK & CO., Inc.

/s/ Kenneth C. Frazier

Kenneth C. Frazier

/s/ Robert M. Davis

Robert M. Davis

/s/ Rita A. Karachun

Rita A. Karachun

/s/ Leslie A. Brun

Leslie A. Brun

/s/ Thomas R. Cech

Thomas R. Cech

/s/ Mary Ellen Coe

Mary Ellen Coe

/s/ Pamela J. Craig

Pamela J. Craig

/s/ Thomas H. Glocer

Thomas H. Glocer

/s/ Risa J. Lavizzo-Mourey

Risa J. Lavizzo-Mourey

Chairman, President and Chief Executive Officer
(Principal Executive Officer; Director)

Executive Vice President, Global Services, 
and Chief Financial Officer
(Principal Financial Officer)

Senior Vice President Finance—Global Controller
(Principal Accounting Officer)

DIRECTORS

/s/ Paul B. Rothman

Paul B. Rothman

/s/ Patricia F. Russo

Patricia F. Russo

/s/ Christine E. Seidman

Christine E. Seidman

/s/ Inge G. Thulin

Inge G. Thulin

/s/ Kathy J. Warden

Kathy J. Warden

/s/ Peter C. Wendell

Peter C. Wendell

 
I, Kelly Grez, Deputy Corporate Secretary of Merck & Co., Inc. (the “Company”), a corporation duly organized and existing under the laws of the State of
New Jersey, do hereby certify that the following is a true copy of a resolution adopted by unanimous written consent of the Board of Directors of the Company on
February 25, 2021 in accordance with the provisions of the By-Laws of the Company:

Exhibit 24.2

“Special Resolution No. 13 – 2021

RESOLVED,  that  the  proposed  form  of  the  Annual  Report  on  Form  10-K  of  the  Company  for  the  fiscal  year  ended
December 31, 2020, attached hereto, is hereby approved with such changes as the proper officers of the Company, with the advice of counsel,
deem appropriate;

FURTHER RESOLVED, that each officer and director who may be required to execute the aforesaid Annual Report on Form
10-K  or  any  amendments  thereto  (whether  on  behalf  of  the  Company  or  as  an  officer  or  director  thereof,  or  by  attesting  the  seal  of  the
Company, or otherwise) is hereby authorized to execute a power of attorney appointing Jennifer Zachary as his/her true and lawful attorney
to execute in his/her name, place and stead (in any such capacity) such Annual Report on Form 10‑K and any and all amendments thereto and
any  and  all  exhibits  and  other  documents  necessary  or  incidental  in  connection  therewith  and  to  file  the  same  with  the  Securities  and
Exchange Commission, the attorney to have power to act and to have full power and authority to do and perform in the name and on behalf of
each of said officers and directors, or both, as the case may be, every act whatsoever necessary or advisable to be done in the premises as
fully and to all intents and purposes as any such officer or director might or could do in person; and

FURTHER RESOLVED that an executed copy of the Action by Unanimous Written Consent be filed with the minutes of the

meetings of the Board of Directors of the Company."

IN WITNESS WHEREOF, I have hereunto subscribed my signature and affixed the seal of the Company this 25  day of February 2021.

th

[Corporate Seal]

/s/ Kelly Grez
Kelly Grez 
Deputy Corporate Secretary

Exhibit 31.1

I, Kenneth C. Frazier, certify that:

1.    I have reviewed this annual report on Form 10-K of Merck & Co., Inc.;

CERTIFICATION

2.        Based  on  my  knowledge,  this  report  does  not  contain  any  untrue  statement  of  a  material  fact  or  omit  to  state  a  material  fact  necessary  to  make  the

statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.        Based  on  my  knowledge,  the  financial  statements,  and  other  financial  information  included  in  this  report,  fairly  present  in  all  material  respects  the

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.        The  registrant’s  other  certifying  officer(s)  and  I  are  responsible  for  establishing  and  maintaining  disclosure  controls  and  procedures  (as  defined  in
Exchange  Act Rules 13a-15(e)  and 15d-15(e))  and internal  control  over financial  reporting  (as defined  in Exchange  Act Rules 13a-15(f)  and 15d-15(f))  for the
registrant and have:

a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure
that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during
the period in which this report is being prepared;

b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision,
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;

c)    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness

of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal
quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s
internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the

registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely

to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over

financial reporting.

Date: February 25, 2021

By:     

/s/ Kenneth C. Frazier
KENNETH C. FRAZIER 
Chairman, President and Chief Executive Officer

Exhibit 31.2

I, Robert M. Davis, certify that:

1.    I have reviewed this annual report on Form 10-K of Merck & Co., Inc.;

CERTIFICATION

2.        Based  on  my  knowledge,  this  report  does  not  contain  any  untrue  statement  of  a  material  fact  or  omit  to  state  a  material  fact  necessary  to  make  the

statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.        Based  on  my  knowledge,  the  financial  statements,  and  other  financial  information  included  in  this  report,  fairly  present  in  all  material  respects  the

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.        The  registrant’s  other  certifying  officer(s)  and  I  are  responsible  for  establishing  and  maintaining  disclosure  controls  and  procedures  (as  defined  in
Exchange  Act Rules 13a-15(e)  and 15d-15(e))  and internal  control  over financial  reporting  (as defined  in Exchange  Act Rules 13a-15(f)  and 15d-15(f))  for the
registrant and have:

a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure
that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during
the period in which this report is being prepared;

b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision,
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;

c)    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness

of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal
quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s
internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the

registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely

to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over

financial reporting.

Date:   February 25, 2021

By:      

/s/ Robert M. Davis
ROBERT M. DAVIS 
Executive Vice President, Global Services, 
and Chief Financial Officer

Section 1350
Certification of Chief Executive Officer

Exhibit 32.1

Pursuant to 18 U.S.C. Section 1350, the undersigned officer of Merck & Co., Inc. (the “Company”), hereby certifies that the Company’s Annual Report on
Form 10-K for the year ended December 31, 2020 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of
1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
/s/ Kenneth C. Frazier
Dated: February 25, 2021
Name: KENNETH C. FRAZIER
Title: Chairman, President and Chief Executive Officer

 
 
 
Section 1350
Certification of Chief Financial Officer

Exhibit 32.2

Pursuant to 18 U.S.C. Section 1350, the undersigned officer of Merck & Co., Inc. (the “Company”), hereby certifies that the Company’s Annual Report on
Form 10-K for the fiscal year ended December 31, 2020 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange
Act  of  1934  and  that  the  information  contained  in  the  Report  fairly  presents,  in  all  material  respects,  the  financial  condition  and  results  of  operations  of  the
Company.
Dated: February 25, 2021

/s/ Robert M. Davis
Name: ROBERT M. DAVIS
Title: Executive Vice President, Global Services,

and Chief Financial Officer