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Item 1. Business.

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Item 1. 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. 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.

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.

Spin-Off of Organon & Co.

On June 2, 2021, Merck completed the spin-off (the Spin-Off) of 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 established brands included in the transaction consisted of dermatology, non-opioid pain management, respiratory, select cardiovascular products, as well as the rest of Merck’s diversified brands franchise. Merck’s existing research pipeline programs continue to be owned and developed within Merck as planned.

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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)202120202019
Total Sales$48,704$41,518$39,121
Pharmaceutical42,75436,61034,100
Keytruda17,18614,38011,084
Gardasil/Gardasil 95,6733,9383,737
Januvia/Janumet5,2885,2765,524
ProQuad/M-M-R II*/Varivax*2,1351,8782,275
Bridion1,5321,1981,131
Alliance revenue - Lynparza*(1)*989725444
Molnupiravir952——
Pneumovax 238931,087926
Simponi825838830
RotaTeq807797791
Isentress/Isentress HD769857975
Alliance revenue - Lenvima*(1)*704580404
Animal Health5,5684,7034,393
Livestock3,2952,9392,784
Companion Animals2,2731,7641,609
Other Revenues*(2)*382205628

(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. 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 or gastroesophageal junction (GEJ) carcinoma, head and neck squamous cell carcinoma (HNSCC), hepatocellular carcinoma (HCC), non-small-cell lung cancer (NSCLC), melanoma, Merkel cell carcinoma, microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) cancer (solid tumors), including MSI-H/dMMR colorectal cancer (CRC), primary mediastinal large B-cell lymphoma (PMBCL), tumor mutational burden-high (TMB-H) cancer (solid tumors), 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 trastuzumab, fluoropyrimidine- and platinum-containing chemotherapy for human epidermal growth factor 2 (HER2)-positive gastric or GEJ adenocarcinoma, in combination with platinum-and fluoropyrimidine-based chemotherapy for esophageal or GEJ carcinoma, in combination with chemotherapy, with or without bevacizumab, for cervical cancer, in combination with chemotherapy for triple-negative breast cancer (TNBC), in combination with axitinib for advanced renal cell carcinoma (RCC), and in combination with lenvatinib for endometrial carcinoma or RCC. Keytruda is also approved for certain patients with high-risk early-stage TNBC in combination with chemotherapy as neoadjuvant treatment, and then continued as a single agent as adjuvant treatment after surgery. Keytruda is also approved as a monotherapy for the adjuvant treatment of certain patients with RCC. 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

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thyroid cancer, hepatocellular carcinoma, in combination with everolimus for certain patients with RCC, and in combination with Keytruda for certain patients with endometrial carcinoma or RCC.

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 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; 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; Noxafil (posaconazole), an antifungal agent for the prevention of certain invasive fungal 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; 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

Molnupiravir, an investigational oral antiviral COVID-19 medicine; Isentress/Isentress HD (raltegravir), an HIV integrase inhibitor for use in combination with other antiretroviral agents for the treatment of HIV-1 infection.

Cardiovascular

Adempas (riociguat), a cardiovascular drug for the treatment of pulmonary arterial hypertension; Verquvo (vericiguat), a medicine to reduce the risk of cardiovascular death and heart failure hospitalization following a hospitalization for heart failure or need for outpatient intravenous diuretics in certain adults with symptomatic chronic heart failure and reduced ejection fraction.

Diabetes

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

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

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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.

2021 Product Approvals and Authorizations

Set forth below is a summary of significant product approvals and authorizations received by the Company in 2021.

ProductDateApproval
KeytrudaJanuary 2021European Commission (EC) approved Keytruda as monotherapy for the first-line treatment of adult patients with MSI-H or dMMR CRC.
March 2021EC approved Keytruda as monotherapy for the treatment of adult and pediatric patients aged 3 years and older with relapsed or refractory cHL who have failed autologous stem cell transplant (ASCT) or following at least two prior therapies when ASCT is not a treatment option.
March 2021U.S. Food and Drug Administration (FDA) approved Keytruda in combination with platinum- and fluoropyrimidine-based chemotherapy for the treatment of patients with locally advanced or metastatic esophageal or GEJ (tumors with epicenter 1 to 5 centimeters above the GEJ) carcinoma that is not amenable to surgical resection or definitive chemoradiation.
May 2021FDA approved Keytruda, in combination with trastuzumab, fluoropyrimidine- and platinum-containing chemotherapy, for the first-line treatment of patients with locally advanced unresectable or metastatic HER2-positive gastric or GEJ adenocarcinoma.
June 2021China’s National Medical Products Administration (NMPA) approved Keytruda as a monotherapy for the first-line treatment of patients with unresectable or metastatic MSI-H or dMMR CRC that is KRAS, NRAS and BRAF all wild-type.

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KeytrudaJune 2021EC approved Keytruda in combination with platinum- and fluoropyrimidine-based chemotherapy for the first-line treatment of patients with locally advanced unresectable or metastatic carcinoma of the esophagus or HER2-negative GEJ adenocarcinoma in adults whose tumors express PD-L1 (Combined Positive Score [CPS] ≥10).
July 2021FDA approved Keytruda as monotherapy for the treatment of patients with locally advanced cSCC that is not curable by surgery or radiation.
July 2021FDA approved Keytruda plus Lenvima for the treatment of patients with advanced endometrial carcinoma that is not MSI-H or dMMR, who have disease progression following prior systemic therapy in any setting and are not candidates for curative surgery or radiation.
July 2021FDA approved Keytruda for the treatment of patients with high-risk, early-stage TNBC in combination with chemotherapy as neoadjuvant treatment, then continued as single agent as adjuvant treatment after surgery.
August 2021FDA approved Keytruda for the treatment of patients with locally advanced or metastatic urothelial carcinoma who are not eligible for any platinum-containing chemotherapy.
August 2021Japan Pharmaceuticals and Medical Devices Agency (PMDA) approved Keytruda for the treatment of patients with PD-L1-positive, hormone receptor-negative and HER2-negative, inoperable or recurrent breast cancer.
August 2021PMDA approved Keytruda for the treatment of patients with unresectable, advanced or recurrent MSI-H CRC.
August 2021FDA approved Keytruda plus Lenvima for the first-line treatment of adult patients with advanced RCC.
September 2021NMPA approved Keytruda in combination with platinum- and fluoropyrimidine-based chemotherapy for first-line treatment of patients with locally advanced, unresectable or metastatic carcinoma of the esophageal or GEJ.
October 2021FDA approved Keytruda in combination with chemotherapy, with or without bevacizumab, for the treatment of patients with persistent, recurrent or metastatic cervical cancer whose tumors express PD-L1 (CPS ≥1) as determined by an FDA-approved test.
October 2021EC approved Keytruda in combination with chemotherapy for the first-line treatment of locally recurrent unresectable or metastatic TNBC in adults whose tumors express PD-L1 (CPS ≥1) and who have not received prior chemotherapy for metastatic disease.
November 2021FDA approved Keytruda for the adjuvant treatment of patients with RCC at intermediate-high or high risk of recurrence following nephrectomy, or following nephrectomy and resection of metastatic lesions.
November 2021EC approved Keytruda plus Lenvima as a first-line treatment for adult patients with advanced RCC.

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KeytrudaNovember 2021EC approved Keytruda plus Lenvima for the treatment of advanced or recurrent endometrial carcinoma in adults who have disease progression on or following prior treatment with a platinum‑containing therapy in any setting and who are not candidates for curative surgery or radiation.
November 2021PMDA approved Keytruda in combination with chemotherapy (5-fluorouracil plus cisplatin) for the first-line treatment of patients with radically unresectable, advanced or recurrent esophageal carcinoma.
December 2021FDA approved Keytruda as a monotherapy for the adjuvant treatment of adult and pediatric (12 years and older) patients with stage IIB or IIC melanoma following complete resection. The FDA also expanded the indication for Keytruda as adjuvant treatment for stage III melanoma following complete resection to include pediatric patients (12 years and older).
December 2021Japan’s Ministry of Health, Labor and Welfare (MHLW) approved Keytruda in combination with Lenvima for the treatment of patients with unresectable, advanced or recurrent endometrial carcinoma that progressed after cancer chemotherapy.
Lynparza*(1)*June 2021NMPA approved Lynparza as monotherapy for the treatment of adult patients with germline or somatic BRCA-mutated metastatic castration-resistant prostate cancer who have progressed following prior treatment that included a new hormonal agent (abiraterone, enzalutamide).
molnupiravir*(2)*December 2021FDA granted Emergency Use Authorization (EUA) for molnupiravir to treat mild to moderate COVID-19 in adults with positive results of direct SARS-CoV-2 viral testing, and who are at high risk for progression to severe COVID-19, including hospitalization or death, and for whom alternative COVID-19 treatment options authorized by the FDA are not accessible or clinically appropriate.
December 2021MHLW granted molnupiravir Special Approval for Emergency for the treatment of infectious disease caused by SARS-CoV-2.
VaxneuvanceJuly 2021FDA approved Vaxneuvance for active immunization for the prevention of invasive disease caused by Streptococcus pneumoniae serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, 22F, 23F and 33F in adults 18 years of age and older.
December 2021EC approved Vaxneuvance for active immunization for the prevention of invasive disease and pneumonia caused by Streptococcus pneumoniae in individuals 18 years of age and older.
Verquvo*(3)*January 2021FDA approved Verquvo to reduce the risk of cardiovascular death and heart failure (HF) hospitalization following a hospitalization for heart failure or need for outpatient intravenous (IV) diuretics in adults with symptomatic chronic HF and ejection fraction less than 45%.
July 2021EC approved Verquvo for the treatment of symptomatic chronic heart failure in adult patients with reduced ejection fraction who are stabilized after a recent decompensation event requiring IV therapy.
WeliregAugust 2021FDA approved Welireg for adult patients with von Hippel-Lindau (VHL) disease who require therapy for associated RCC, central nervous system hemangioblastomas, or pancreatic neuroendocrine tumors, not requiring immediate surgery.

(1) Being jointly developed and commercialized in a worldwide collaboration with AstraZeneca.

(2) Being jointly developed and commercialized in a worldwide collaboration with Ridgeback Biopharmaceuticals LP. Molnupiravir has not been approved by the FDA but has been authorized for emergency use.

(3) Being jointly developed and commercialized in a worldwide collaboration with Bayer AG.

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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. Changes to the U.S. health care system as part of health care reform enacted in prior years, 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 2021 was negatively affected by other cost-reduction measures taken by governments and other third parties to lower health care costs. In the U.S., the Biden Administration and Congress continue to discuss legislation designed to control health care costs, including the cost of drugs. The Company anticipates all of these actions and additional actions in the future will continue to negatively affect revenue performance.

United States

The Company faces increasing pricing pressure from managed care organizations, government agencies and programs that could negatively affect the Company’s sales and profit margins, including, through (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 Patient Protection and Affordable Care Act (ACA).

In the U.S., 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.

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Additionally in the U.S., consolidation and integration among health care providers is a major factor in the competitive marketplace for pharmaceutical products. Health plans and pharmacy benefit managers (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 increasing the cost-sharing 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 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, 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 U.S. 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 2021, the Company’s gross U.S. sales were reduced by 43.5% as a result of rebates, discounts and returns.

Legislative Changes

In 2021, Congress actively considered multiple versions of drug pricing legislation that could significantly impact branded pharmaceutical manufacturers. This legislation would implement a government negotiation plan for certain products covered by Medicare Parts B and D, institute financial penalties for price increases above inflation, and redesign the Medicare Part D program to include a cap on patients’ out of pocket costs and realign the liability for costs of the benefit among manufacturers, health plans, and the government. It is unclear when or if this legislation will be passed by Congress, and it remains very uncertain as to what other proposals, if any, may be included as part of future federal legislative proposals that would directly or indirectly affect the Company.

Also in 2021, Congress passed the American Rescue Plan Act of 2021, which included a provision that eliminates the statutory cap on rebates drug manufacturers pay to Medicaid beginning in January 2024. These rebates act as a discount off the list price and eliminating the cap means that manufacturer discounts paid to Medicaid can increase. Prior to this change, manufacturers have not been required to pay more than 100% of the Average Manufacturer Price (AMP) in rebates to state Medicaid programs for Medicaid-covered drugs. As a result of this provision, beginning in 2024, it is possible that manufacturers may have to pay state Medicaid programs more in rebates than they received on sales of particular products. This change could present a risk to Merck in the future for drugs that have high Medicaid utilization and rebate exposure that is more than 100% of the AMP.

The Company also faces increasing pricing pressure in the states, which are looking to exert greater influence over the price of prescription drugs. 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 pricing and will increasingly shift to more aggressive price control tools such as Prescription Drug Affordability Boards that have the authority to conduct affordability reviews and establish upper payment limits.

Regulatory Changes

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 AMP and Best Price, two metrics used to determine the rebates drug manufacturers are required to pay to state Medicaid programs. On December 21, 2020, CMS issued a final rule making significant changes to these requirements. Effective January 1, 2023, this final rule changes the way that manufacturers must calculate Best Price in relation to certain patient support programs, including coupons. PhRMA, a pharmaceutical industry trade group of which the Company is a member, filed a complaint challenging this rule as invalid asserting that it conflicts

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with the plain language of the Medicaid drug rebate statute. Should this legal challenge fail, the impact of this and other provisions in this final rule could adversely impact the Company’s business, cash flow, results of operations, financial condition and prospects.

In November 2020, the Department of Health and Human Services Office of Inspector General 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. 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 service arrangements between pharmaceutical manufacturers and PBMs. Congress has delayed implementation of this Final Rule until January 1, 2026 and pending federal legislation would repeal it entirely.

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.

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 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 in which it 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.

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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. The TCA was signed on December 30, 2020, was applied provisionally as of January 1, 2021, and entered into force on May 1, 2021. As a result of the TCA, the Company believes that its operations will not be materially adversely affected by Brexit.

Japan

In Japan, the pharmaceutical industry is subject to government-mandated annual 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 2022.

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. While the mechanism for drugs being added to the government’s National Reimbursement Drug List (NRDL) evolves, inclusion may require a price negotiation which could impact the outlook in the market for selected brands. In 2021, drugs were added to the NRDL with an average of more than 60% 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 last five rounds of VBP had, on average, a price reduction of more than 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 (especially for COVID-19 vaccines and drugs), 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

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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 global 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 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 U.S., 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 U.S. 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, in collaboration with key stakeholders, it has a role to play in helping to ensure that its science advances health care, and its products are accessible and affordable. The Company is committed to ensuring a reliable, safe global supply of its quality medicines and vaccines, and to developing, testing and implementing innovative solutions that address barriers to access and affordability of its medicines and vaccines. The Company’s approach is designed to enable it to serve the greatest number of patients today, while

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meeting the needs of patients in the future. 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 U.S. 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.

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 U.S., except if the data controller meets very specific requirements. Following the Schrems II decision of the Court of Justice of the EU 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 the 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.

On August 20, 2021, China’s 13th National People’s Congress passed the Personal Information Protection Law (PIPL) that aims to standardize the handling of personal information in China which became effective on November 1, 2021. The PIPL currently applies to the processing of personal information of natural persons in China, the processing of personal information outside China where the purpose is to provide products and services in China, and to analyze the activities of individuals in China. While similar to the GDPR, the PIPL contains unique requirements not found in the GDPR.

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The Company has developed and implemented comprehensive plans to ensure compliance with the PIPL, with those relating to data localization and cross-border transfers yet to be completed pending forthcoming guidance from the Cyberspace Administration of China.

Additional laws and regulations enacted in the U.S. (such as the California Consumer Privacy Act), Europe, Asia, and Latin America, have increased enforcement and litigation activity in the U.S. 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 requirements and risks and to 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 U.S. 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 U.S. for indications of new or currently marketed drugs if certain agreed upon pediatric studies are completed by the applicant. Current U.S. patent law 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 U.S., the EU, Japan and China (including the potential for patent term extensions (PTE) and SPCs where indicated) for the following marketed products:

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ProductYear of Expiration (U.S.)Year of Expiration (EU)(1)Year of Expiration (Japan)(2)Year of Expiration (China)
Januvia202320222025-20262022
Janumet20232022N/A2022
Janumet XR2023N/AN/A2022
Isentress20242023*(3)*2022-2026*(4)*2022
SimponiN/A*(5)*2024*(6)*N/A*(5)*N/A*(5)*
Lenvima*(7)*2025*(3)*2026*(3)* (SPCs)2026Expired
Bridion2026*(3)*20232024Expired
Bravecto2026 (with pending PTE)2025 (patents), 2029 (SPCs)20292025
Gardasil2028ExpiredExpiredN/A
Gardasil 920282025 (patents), 2030*(3)* (SPCs)N/A2025
Keytruda20282030*(3)*2032-20332028
Lynparza*(8)*2028*(3)* (with pending PTE)2024 (patents), 2029*(3)* (SPCs)2028-20292024
Zerbaxa2028*(3)*2023 (patents), 2028*(3)* (SPCs)2028 (with pending PTE)N/A
Adempas*(9)*N/A*(10)*2028*(3)*2027-20282023
Belsomra2029*(3)*N/A2031N/A
Prevymis2029*(3)* (with pending PTE)2024 (patents), 2029*(3)* (SPCs)2029N/A
Segluromet*(11)*2031 (with pending PTE)2029 (patents), 2034 (SPCs)N/A*(12)*2029
Steglatro*(11)*2031*(3)* (with pending PTE)2029 (patents), 2034*(3)* (SPCs)N/A*(12)*2029
Steglujan*(11)*2031 (with pending PTE)2029 (patents), 2034 (SPCs)N/A*(12)*2029
Verquvo*(8)*2035 (with pending PTE)N/A*(13)*N/A*(13)*N/A*(13)*
Vaxneuvance2031 (with pending PTE)No PatentN/AN/A
Delstrigo2032 (with pending PTE)2031 (patents), 2033 (SPCs)N/A2031
Pifeltro2032 (with pending PTE)2031 (patents), 2033 (SPCs)20362031
Recarbrio2033*(3)* (with pending PTE)N/AN/AN/A
Welireg2035 (with pending PTE)N/AN/AN/A

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 11. “Contingencies and Environmental Liabilities” below.

N/A: Currently no marketing approval.

*(1)*The EU date represents the expiration date for the following four countries: France, Germany, Italy, and Spain (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)*Expiry date reflects the approved product and includes granted PTE for the 600 mg tablet in Japan.

*(5)*The Company has no marketing rights in the U.S., Japan or China.

*(6)*The distribution agreement with Janssen Pharmaceuticals, Inc. expires on October 1, 2024.

*(7)*Part of a global strategic oncology collaboration with Eisai Co., Ltd.

*(8)*Part of a global strategic oncology collaboration with AstraZeneca.

*(9)*Being commercialized in a worldwide collaboration with Bayer AG.

*(10)*The Company has no marketing rights in the U.S.

*(11)*Being commercialized and promoted in a worldwide, except Japan, collaboration with Pfizer Inc.

*(12)*The Company has no marketing rights in Japan.

*(13)*The Company has no marketing rights in the EU, Japan or China.

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The Company has the following key U.S. patent protection for drug candidates under review in the U.S. by the FDA. Additional patent term may be provided for these pipeline candidates based on Patent Term Restoration and Pediatric Exclusivity.

Under Review in the U.S.Currently Anticipated Year of Expiration (in the U.S.)
MK-7264 (gefapixant)2027

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

Phase 3 Drug CandidateCurrently Anticipated Year of Expiration (in the U.S.)
MK-8591 (islatravir)2026
MK-7962 (sotatercept)2027
MK-8591A (doravirine + islatravir)2032 (pending PTE for doravirine)
MK-1308A (quavonlimab + pembrolizumab)2035
MK-7684A (vibostolimab + pembrolizumab)2035
MK-4280A (favezelimab + pembrolizumab)2035
MK-1654 (clesrovimab)2036
MK-4482 (molnupiravir)(1)2038

*(1)*Received Emergency Use Authorization from the FDA for the treatment of high-risk adults with mild to moderate COVID-19.

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 U.S., 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 compound patent normally results in a loss of market exclusivity for the covered pharmaceutical product, commercial benefits may continue to be derived from: (i) later-expiring 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 U.S. 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 U.S. 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 U.S. 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 11. “Contingencies and Environmental Liabilities” below.

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.

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Royalty income in 2021 on patent and know-how licenses and other rights amounted to $286 million. Merck also incurred royalty expenses amounting to $2.4 billion in 2021 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, 2021, approximately 17,500 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 U.S. 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 U.S., 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 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.

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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 U.S., 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 U.S. Secretary of Health and Human Services has exercised statutory authority to determine that a public health emergency exists, and declared 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 FDA may revise or revoke an EUA if the circumstances justifying its issuance no longer exist, the criteria for its issuance are no longer met, or other circumstances make a revision or revocation appropriate to protect the public health or safety.

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 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

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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 U.S. 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 U.S. 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 U.S. and internationally or in late-stage clinical development.

MK-4482, molnupiravir, is an investigational oral antiviral medicine for the treatment of mild to moderate COVID-19 in adults who are at risk for progressing to severe disease. Merck is developing molnupiravir in collaboration with Ridgeback Biotherapeutics LP. The FDA granted Emergency Use Authorization (EUA) for molnupiravir in December 2021; as updated in February 2022, to authorize molnupiravir for the treatment of mild to moderate COVID-19 in adults with positive results of direct SARS-CoV-2 viral testing, and who are at high risk for progression to severe COVID-19, including hospitalization or death, and for whom alternative COVID-19 treatment options approved or authorized by the FDA are not accessible or clinically appropriate. The authorization is based on the Phase 3 MOVe-OUT trial. Molnupiravir is not approved for any use in the U.S. and is authorized only for the duration of the declaration that circumstances exist justifying the authorization of its emergency use under the Food, Drug and Cosmetic Act, unless the authorization is terminated or revoked sooner. Molnupiravir has also received conditional marketing authorization in the UK and Special Approval for Emergency in Japan. In November 2021, the EMA issued a positive scientific opinion for molnupiravir, which is intended to support national decision-making on the possible use of molnupiravir prior to marketing authorization. In October 2021, the EMA initiated a rolling review for molnupiravir for the treatment of COVID-19 in adults. Merck plans to work with the Committee for Medicinal Products for Human Use of the EMA to complete the rolling review process to facilitate initiating the formal review of the MAA. Applications to other regulatory bodies worldwide are underway. Molnupiravir is also being evaluated for post-exposure prophylaxis in the Phase 3 MOVe-AHEAD trial, which is evaluating the efficacy and safety of molnupiravir for the prevention of COVID-19 in adults who reside with a person with COVID-19. As previously announced, data from the MOVe-IN clinical trial indicated that molnupiravir is unlikely to demonstrate a clinical benefit in hospitalized patients, who generally had a longer duration of symptoms prior to study entry; therefore, the decision was made not to proceed to Phase 3.

MK-7264, gefapixant, is an investigational, orally administered, selective P2X3 receptor antagonist, for the treatment of refractory chronic cough or unexplained chronic cough in adults under review by the FDA. The NDA for gefapixant is based on results from the COUGH-1 and COUGH-2 clinical trials. In January 2022, the FDA issued a Complete Response Letter (CRL) regarding Merck’s NDA for gefapixant. In the CRL, the FDA requested additional information related to measurement of efficacy. The CRL was not related to the safety of gefapixant. Merck is reviewing the letter and considering next steps. Gefapixant is also under review in the EU, although the review period has been extended pending the receipt of additional information from the Company.

V114 is an investigational 15-valent pneumococcal conjugate vaccine under review in Japan for use in adults. V114 was approved in the U.S. in 2021 for use in adults where it is marketed as Vaxneuvance. Vaxneuvance is also under priority review by the FDA for the prevention of invasive pneumococcal disease in children 6 weeks through 17 years of age. The FDA grants priority review to medicines and vaccines that, if approved, would provide a significant improvement in the safety or effectiveness of the treatment or prevention of a serious condition. The FDA set a PDUFA date of April 1, 2022. The supplemental BLA is supported by results from Phase 2 and Phase 3 clinical studies in pediatric populations including infants, children, and adolescents.

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MK-3475, 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 1,650 clinical trials, including more than 1,250 trials that combine Keytruda with other cancer treatments. These studies encompass more than 30 cancer types including: biliary, estrogen receptor positive breast cancer, cervical, colorectal, cutaneous squamous cell, endometrial, esophageal, 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.

Keytruda is under review in the EU for the adjuvant treatment of adult and pediatric (12 years and older) patients with Stage IIB or IIC melanoma following complete resection based on data from the Phase 3 KEYNOTE-716 trial.

Keytruda is under review in Japan for the adjuvant treatment of patients with RCC at intermediate-high or high risk of recurrence following nephrectomy (surgical removal of a kidney) based on data from the Phase 3 KEYNOTE-564 trial.

Keytruda is under review by the FDA for the treatment of patients with advanced endometrial cancer that is MSI-H or dMMR, who have disease progression following prior systemic therapy in any setting and are not candidates for curative surgery or radiation. This submission is based on data from the KEYNOTE-158 trial. The FDA set a PDUFA date of March 28, 2022.

Keytruda is under review in the EU for the treatment of unresectable or metastatic MSI-H or dMMR colorectal, endometrial, gastric, small intestine, biliary, or pancreatic cancer in adults who have received prior therapy. The proposed indication is based on the results from the KEYNOTE-164 and KEYNOTE-158 trials.

Keytruda in combination with chemotherapy is under review in the EU and Japan for the treatment of patients with high-risk, early-stage TNBC as neoadjuvant treatment, and then as a single agent as adjuvant treatment after surgery based on data from the KEYNOTE-522 trial.

Keytruda is under review in Japan for treatment of adult patients with advanced or recurrent TMB-H solid tumors that have progressed after chemotherapy (limited to use when difficult to treat with standard of care) based on the KEYNOTE-158 trial.

Keytruda in combination with chemotherapy with or without bevacizumab is also under review in the EU and Japan for the first-line treatment of patients with persistent, recurrent or metastatic cervical cancer based on the KEYNOTE-826 trial.

In January 2021, Merck, the European Organisation for Research and Treatment of Cancer and the European Thoracic Oncology Platform announced that the Phase 3 KEYNOTE-091 trial investigating Keytruda met one of its dual primary endpoints of disease-free survival (DFS) for the adjuvant treatment of patients with stage IB-IIIA NSCLC following surgical resection regardless of PD-L1 expression. Based on an interim analysis review conducted by an independent Data Monitoring Committee, adjuvant treatment with Keytruda resulted in a statistically significant and clinically meaningful improvement in DFS compared with placebo in the all-comer population of patients with stage IB-IIIA NSCLC. At the interim analysis, there was also an improvement in DFS for patients whose tumors express PD-L1 (tumor proportion score [TPS] ≥50%) treated with Keytruda compared to placebo; however, this dual primary endpoint did not meet statistical significance per the pre-specified statistical plan. The trial will continue to analyze DFS in patients whose tumors express high levels of PD-L1 (TPS ≥50%) and evaluate overall survival, a key secondary endpoint. Results will be presented at an upcoming medical meeting and will be submitted to regulatory authorities.

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 PLC. In November 2021, the FDA accepted for priority review a supplemental NDA for Lynparza for the adjuvant treatment of patients with BRCA-mutated, human epidermal growth factor receptor 2 (HER2)-negative high-risk, early-stage breast cancer who have already been treated with chemotherapy either before or after surgery based on the results from the Phase 3 OlympiA trial. The FDA set a PDUFA date during the first quarter of 2022.

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This indication is also under review in the EU. Lynparza is also under review in the EU for the treatment of certain patients with metastatic castration-resistant prostate cancer based on the PROpel clinical trial.

MK-7902, Lenvima, is an oral receptor tyrosine kinase inhibitor being developed as part of a collaboration with Eisai Co., Ltd. (Eisai). Merck and Eisai are studying the Keytruda plus Lenvima combination through the LEAP (LEnvatinib And Pembrolizumab) clinical program that includes 17 Phase 3 studies across 14 different tumor types (biliary cancer, CRC, endometrial carcinoma, esophageal cancer, gastric cancer, glioblastoma, HCC, HNSCC, melanoma, pancreatic cancer, prostate cancer, NSCLC, SCLC and RCC).

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 the KEYNOTE-524/Study 116 trial. 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 overall survival 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.

Merck and Eisai have stopped LEAP-007, the Phase 3 study evaluating the first-line treatment of Lenvima in combination with Keytruda in participants with metastatic squamous or non-squamous NSCLC, whose tumors are PD-L1 positive with no EGFR or ALK genomic tumor aberrations. The trial has been discontinued following the recommendation of the external Data Monitoring Committee (eDMC) which met, as scheduled, to assess safety and futility. The eDMC determined that the study had met the criteria for declaring futility and the benefit/risk profile of the combination did not support continuing the trial.

Merck and Eisai have closed LEAP-011 for further enrollment. LEAP-011 is a Phase 3 study evaluating Lenvima in combination with Keytruda for the first-line treatments of patients with platinum-ineligible urothelial carcinoma. Enrollment was closed following the recommendation of the eDMC, which met, as scheduled, to assess safety and futility. The eDMC determined that the benefit/risk profile of the combination did not support continuing the trial and improvements in outcomes in favor of the combination were unlikely to be as high as initially hypothesized.

The Company also has several other programs in Phase 3 clinical development.

MK-1308A is the coformulation of quavonlimab, Merck’s novel investigational anti-CTLA-4 antibody, with pembrolizumab being evaluated for the treatment of RCC.

Subcutaneous MK-3475, pembrolizumab, is being evaluated for comparability with the intravenous formulation in NSCLC.

MK-4280A is the coformulation of favezelimab, Merck’s novel investigational anti-LAG3 therapy, with pembrolizumab, being evaluated for the treatment of CRC.

MK-6482, Welireg (belzutifan), is a hypoxia-inducible factor-2α (HIF-2α) inhibitor being evaluated for a supplemental indication for the treatment of patients with RCC.

MK-7119, Tukysa, is a small molecule tyrosine kinase inhibitor, for the treatment of HER2-positive cancers in development for the treatment of breast cancer. 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.

MK-7684A is the coformulation of vibostolimab, an anti-TIGIT therapy, with pembrolizumab being evaluated for the treatment of NSCLC.

In December 2021, Merck announced that the FDA had placed clinical holds on the investigational new drug applications for the oral and implant formulations of islatravir (MK-8591) for HIV-1 pre-exposure prophylaxis

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(PrEP); the injectable formulation of islatravir for HIV-1 treatment and prophylaxis; and the oral doravirine/islatravir (MK-8591A) HIV-1 once-daily treatment regimen. The FDA’s clinical hold is based on observations of decreases in total lymphocyte and CD4+ T-cell counts in some participants receiving islatravir in clinical studies. Merck previously announced it had stopped dosing in the Phase 2 IMAGINE-DR clinical trial of islatravir in combination with MK-8507 (MK-8591-013) and paused enrollment in the once-monthly Phase 3 PrEP studies, (MK-8591-022 and MK-8591-024). With the FDA’s clinical hold, no new studies may be initiated. Additionally, Merck and Gilead have made the decision to stop all dosing of participants in the Phase 2 clinical study evaluating an oral-weekly combination treatment regimen of islatravir and Gilead’s investigational lenacapavir in people living with HIV who are virologically suppressed on antiretroviral therapy. This decision follows the joint announcement on November 23, 2021 of a temporary hold on further enrollment and screening in the study, which commenced in October 2021. The two companies will assess whether a different dosing of islatravir in combination with lenacapavir may provide a once-weekly oral therapy option for people living with HIV. Merck and Gilead remain committed to their collaboration, which aims to develop long-acting new treatment options to address the unmet needs for people living with HIV.

MK-7962, sotatercept, is a potentially first-in-class therapy for the treatment of pulmonary arterial hypertension (PAH). Sotatercept is in clinical trials as an add-on to current standard of care for the treatment of PAH. Sotatercept was obtained in connection with Merck’s acquisition of Acceleron Pharma Inc. in 2021.

MK-1654, clesrovimab, is a respiratory syncytial virus (RSV) monoclonal antibody that is being evaluated for the prevention of RSV medically attended lower respiratory tract infection in infants and certain children over 2 years of age.

In April 2021, Merck announced the discontinuation of development of MK-7110 which was being evaluated for the treatment of hospitalized patients with COVID-19. Merck obtained MK-7110 in December 2020 through its acquisition of OncoImmune, a privately held clinical-stage biopharmaceutical company. In 2021, Merck received feedback from the FDA that additional data would be needed to support a potential EUA application and therefore the Company did not expect MK-7110 would become available until the first half of 2022. Given this timeline and the technical, clinical and regulatory uncertainties, the availability of a number of medicines for patients hospitalized with COVID-19, and the need to concentrate Merck’s resources on accelerating the development and manufacture of the most viable therapeutics and vaccines, Merck decided to discontinue development of MK-7110 for the treatment of COVID-19.

In September 2021, the FDA approved updated labeling for Steglatro, Steglujan and Segluromet, medicines for adults with type 2 diabetes, to include the primary efficacy and safety results from the VERTIS CV trial, which assessed the effect of Steglatro compared with placebo on cardiovascular outcomes in adult patients with type 2 diabetes and established atherosclerotic cardiovascular disease. The FDA issued a CRL concerning the Company’s application for a new indication, based on additional results from the VERTIS CV trial, to reduce the risk of hospitalization for heart failure. The Company has determined not to pursue the indication.

The chart below reflects the Company’s research pipeline as of February 22, 2022. 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.

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Phase 2Phase 3 (Phase 3 entry date)Under Review
Cancer MK-0482*(2)* Non-Small-Cell Lung MK-1026 (nemtabrutinib) Hematological Malignancies MK-1308 (quavonlimab)(2) Non-Small-Cell Lung MK-1308A (quavonlimab+pembrolizumab) Advanced Solid Tumors Colorectal Hepatocellular Melanoma Small-Cell-Lung MK-2140 (zilovertamab vedotin) Breast Hematological Malignancies Non-Small-Cell Lung MK-3475 Keytruda Advanced Solid Tumors MK-4280 (favezelimab)(2) Hematological Malignancies Non-Small-Cell Lung MK-4280A (favezelimab+pembrolizumab) Renal Cell Small-Cell Lung MK-4830*(2)* Non-Small-Cell Lung Renal Cell Small-Cell Lung MK-5890*(2)* Non-Small-Cell Lung Small-Cell Lung MK-6440 (ladiratuzumab vedotin)(1)(3) Breast Esophageal Gastric Head and Neck Melanoma Non-Small-Cell Lung Prostate Small-Cell Lung MK-6482 Welireg*(3)* Biliary Colorectal Hepatocellular Pancreatic Rare cancers Von Hippel-Lindau Disease-Associated Tumors (EU) MK-7119 Tukysa*(1)* Advanced Solid Tumors Biliary Bladder Cervical Colorectal Endometrial Gastric Non-Small-Cell Lung MK-7339 Lynparza*(1)(3)* Advanced Solid Tumors MK-7684 (vibostolimab)(2) Melanoma MK-7684A (vibostolimab+pembrolizumab) Biliary Breast Cervical Endometrial Esophageal Head and Neck Hematological Malignancies Hepatocellular Prostate MK-7902 Lenvima*(1)(2)* Biliary Glioblastoma Pancreatic Prostate Small-Cell Lung V937 Breast Cutaneous Squamous Cell Head and Neck Melanoma Solid Tumors Cardiovascular MK-2060 Chikungunya Virus Vaccine V184 HIV-1 Infection MK-8591B (islatravir+MK-8507)(4) MK-8591D (islatravir+lenacapavir) (1)(4) Nonalcoholic Steatohepatitis (NASH) MK-3655 MK-6024 Overgrowth Syndrome MK-7075 (miransertib) Pneumococcal Vaccine Adult V116 Pulmonary Arterial Hypertension MK-5475 Schizophrenia MK-8189 Treatment Resistant Depression MK-1942Antiviral COVID-19 MK-4482 (molnupiravir) (May 2021)(1)(5) (U.S) Cancer MK-1308A (quavonlimab+pembrolizumab) Renal Cell (April 2021) MK-3475 Keytruda Biliary (September 2019) Cutaneous Squamous Cell (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) MK-3475 (pembrolizumab subcutaneous) Non-Small-Cell Lung (August 2021) MK-4280A (favezelimab+pembrolizumab) Colorectal (November 2021) MK-6482 Welireg*(3)* Renal Cell (February 2020) MK-7119 Tukysa*(1)* Breast (October 2019) MK-7339 Lynparza*(1)(3)* Colorectal (August 2020) Non-Small-Cell Lung (June 2019) Small-Cell Lung (December 2020) MK-7684A (vibostolimab+pembrolizumab) Non-Small-Cell Lung (April 2021) MK-7902 Lenvima*(1)(2)* Colorectal (April 2021) Esophageal (July 2021) Gastric (December 2020) Head and Neck (February 2020) Melanoma (March 2019) Non-Small-Cell Lung (March 2019) HIV-1 Infection MK-8591A (doravirine+islatravir) (February 2020)(4) HIV-1 Prevention MK-8591 (islatravir) (February 2021)(4) Pulmonary Arterial Hypertension MK-7962 (sotatercept) (January 2021) Respiratory Syncytial Virus MK-1654 (clesrovimab) (November 2021)New Molecular Entities/Vaccines Antiviral COVID-19 MK-4482 (molnupiravir)(1) (EU) Cough MK-7264 (gefapixant) (U.S.)(6) (EU) Pneumococcal Vaccine Adult V114 (JPN) Certain Supplemental Filings Cancer MK-3475 Keytruda • Adjuvant Treatment of Stage IIB or IIC Melanoma (KEYNOTE-716) (EU) • Adjuvent Renal Cell Cancer (KEYNOTE-564) (JPN) • MSI-H or dMMR Endometrial Cancer (KEYNOTE-158) (U.S.) •MSI-H or dMMR Six Tumor Basket (KEYNOTE-158) (EU) • High-Risk Early-Stage Triple-Negative Breast Cancer (KEYNOTE-522) (EU) (JPN) • Tumor Mutational Burden-High (KEYNOTE-158) (JPN) • Cervical Cancer (KEYNOTE-826) (EU) (JPN) MK-7339 Lynparza*(1)* • BRCA-Mutated HER2-Negative Adjuvant Breast Cancer (OlympiA) (U.S.) (EU) •First-Line Metastatic Prostate Cancer (PROpel) (EU) MK-7902 Lenvima*(1)(2)* • First-Line Metastatic Hepatocellular Carcinoma (KEYNOTE-524) (U.S.)(7) • Advanced Unresectable Renal Cell Carcinoma (KEYNOTE-581) (JPN)(8)
Footnotes: (1) Being developed in a collaboration. (2) Being developed in combination with Keytruda. (3) Being developed as monotherapy and/or in combination with Keytruda. (4) On FDA clinical hold. (5) Available in the U.S. under Emergency Use Authorization. (6) In January 2022, the FDA issued a CRL. Merck is reviewing the CRL and considering next steps. (7) 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. (8) Approved on February 25, 2022.

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Human Capital

As of December 31, 2021, the Company had approximately 68,000 employees worldwide, with approximately 27,000 employed in the U.S., including Puerto Rico, and, additionally, approximately 14,000 third-party contractors globally.(1) Approximately 67,000 of the Company’s employees are full-time employees. Women and individuals from underrepresented ethnic groups comprise approximately 50% and 32% of its workforce (the Company defines workforce as its employees) in the U.S., respectively. Women comprise 46% of the members of the Board of Directors. Additionally, the Company’s executive team is made up of 33% women. Approximately 23% of the Company’s employees are represented by various collective bargaining groups. The Company’s voluntary turnover rate was approximately 8.8% and 6.0%, respectively, in 2021 and 2020.

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.

(1) Third party contractors include the Company’s temporary workers, independent contractors, and freelancers who are viewed as full-time equivalent employees. They exclude outsourced service providers.

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, employee branding and marketing outreach, social media and strategic alliance partnerships to reach a broad pool of talent in its critical business areas. In 2021, the Company hired approximately 8,700 employees across the globe through various channels including the Company’s external career site, direct passive candidate sourcing, 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.

The Company’s diversity goals include increasing representation in senior management roles*(1)* by 2024 of (i) women globally to 40%, up from 31% in 2020, (ii) Black/African Americans in the U.S. to 10%, up from 3% in 2020, and (iii) Hispanics/Latinos in the U.S. to 10%, up from 5% in 2020. At December 31, 2021, representation in senior management roles at the Company for (i) women globally was 36%, (ii) Black/African Americans in the U.S. was 7%, and (iii) Hispanics/Latinos in the U.S. was 6%. In addition, by 2025, the Company seeks to maintain or exceed both its current inclusion index score and its current employee engagement index score.(2)

*(1) “*Senior management role” is defined as an individual holding either a Vice President or Senior Vice President title.

(2) The Inclusion Index is the average favorability score for employees’ responses to three items in the employee pulse survey (manager supports inclusion, sense of belonging, leaders value perspective). The Employee Engagement Index is the average favorability score for employees’ responses to items in the employee survey.

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Gender and Ethnicity Performance Data**(1)(2)**202120202019
Women in the workforce50%50%49%
Women in the workforce in the U.S.50%50%50%
Women on the Board of Directors46%46%33%
Women in executive roles*(3)*33%33%20%
Women in management roles*(4)*44%42%42%
Members of underrepresented ethnic groups on the Board of Directors23%23%17%
Members of underrepresented ethnic groups in executive roles (U.S.)42%25%40%
Members of underrepresented ethnic groups in the workforce (U.S.)32%30%29%
Members of underrepresented ethnic groups in management roles (U.S.)26%25%23%
New hires that were female53%50%51%
New hires that were members of underrepresented ethnic groups (U.S.)46%40%35%

(1) As of 12/31. As self-identified to the Company.

(2) Prior period data has not been restated to adjust for the Organon Spin-Off.

(3) “Executive role” is defined as an individual holding an Executive Vice President title.

(4) “Management role” is defined as all managers with direct reports other than executives as defined in note 3.

Compensation and Benefits

The Company provides a valuable total rewards package reflecting its commitment to attract, retain and motivate its talent, and support 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, the Company added a personal health care concierge service to assist U.S. employees participating in the Company medical plan with their health care 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 U.S., the Company’s benefits rank in the top quartile of Fortune 100 companies under the Aon 2021 Benefits Index. The Company has been included in Seramount (previously the Working Mother) 100 Best Companies ranking for 35 consecutive years and was named a Seramount top ten Best Company for Dads in 2021.

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 U.S. 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 most recent highest-level awards from the Business Group on Health and the American Heart Association.

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

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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, there is a consistent focus on the importance of continuously developing its diverse and talented people. The Company’s current talent management system supports company-wide performance management, leadership 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

Environmental Sustainability

The Company strives to be a strong environmental steward, and realizes that its strategy and efforts need to continuously improve for the Company to excel in an increasingly resource-constrained world. The Company’s environmental sustainability strategy has three areas of focus:

  • Driving efficiency in operations;

  • Designing new products to minimize environmental impact; and

  • Reducing any impacts in the Company’s upstream and downstream value chain.

The Company has recently adopted a set of new climate goals to address the rising expectations of its customers, investors, external stakeholders and employees regarding the environmental impact of its operations and supply chain. These goals include achieving carbon neutrality for greenhouse gas emissions across operations (Scopes 1 and 2) by 2025, reducing Scope 1 and 2 greenhouse gas emissions 46% by 2030 (from a 2019 baseline), reducing value chain (Scope 3) greenhouse gas emissions by 30% by 2030 (from a 2019 baseline), and sourcing 100% renewable energy for purchased electricity by 2025. The Company’s absolute greenhouse gas reduction targets have been verified by the Science Based Target initiative. Other environmental sustainability initiatives of the Company include:

  • Global water use and stewardship.** The Company’s global water strategy aims to achieve sustainable water management within its operations and its supply chain, as well as address water-related risk. Access to clean water is critical for human health, and water is a key input to the Company’s manufacturing operations. The Company’s sites employ a variety of technologies and techniques, such as closed-loop cooling systems and reused reverse osmosis “reject water,” to reduce the Company’s water footprint and improve operational performance.

  • Waste management and diversion.** The Company continuously strives to reduce the amount of operational waste it generates and to maximize the use of environmentally beneficial disposal methods such as recycling, composting and waste-to-energy.

  • Product stewardship and green and sustainable science.** The Company’s product stewardship program focuses on identifying and either preventing or minimizing potential safety and environmental hazards throughout a product’s life cycle. The Company is also committed to

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understanding, managing and reducing the environmental impacts of its products and the materials associated with discovering and producing them. The Company’s green and sustainable science program uses a “green-by-design” approach. By using more efficient and innovative processing methods and technologies, the Company is reducing the amount of energy, water and raw materials the Company uses to make the Company’s products, thereby reducing the amount of waste the Company generates and lowering the Company’s production costs.

  • Animal conservation.** The Company is a leading worldwide supplier of individual identification, real-time data access and advanced analytics for the animal conservation community. This enables the Company to produce actionable insights that inform recovery actions on a global scale, for species ranging from wild fish to penguins. The Company also provides wild fish conservation monitoring equipment and real-time video monitoring technology to advance fish health and welfare. Together, these technologies help to promote biodiversity and support the global need for reliable and safe sources of protein.

Management does not believe that expenditures related to these initiatives should have a material adverse effect on the Company’s financial condition, results of operations, liquidity or capital resources for any year.

In December 2021, the Company completed its inaugural issuance of a $1.0 billion sustainability bond, which was part of an $8.0 billion underwritten bond offering. The Company intends to use the net proceeds from the sustainability bond offering to support projects and partnerships in the Company’s priority environmental, social and governance (ESG) areas and contribute to the advancement of the United Nations Sustainable Development Goals.

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.

Environmental Regulation and Remediation

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 remediation and environmental liabilities were $12 million in 2021 and are estimated to be $24 million in the aggregate for the years 2022 through 2026. 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 $40 million and $43 million at December 31, 2021 and 2020, respectively. 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 $40 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.

Geographic Area Information

The Company’s operations outside the U.S. are conducted primarily through subsidiaries. Sales worldwide by subsidiaries outside the U.S. as a percentage of total Company sales were 54% in 2021 and were 53% in both 2020 and 2019.

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.

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

The Company’s 2020/2021 Environmental, Social & Governance (ESG) Progress Report, which provides enhanced ESG disclosures, is available on the Company’s website at merck.com/company-overview/responsibility/. Information in the Company’s ESG Progress Report is not incorporated by reference into this Form 10-K.

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