MRK

SEC source: 0000310158-26-000042 · form4.xml · derivative · entry 4

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,130

Underlying: Common Stock · 4,000 shares

Expires 2027-05-04

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The option became exercisable in equal installments on 5/5/2018, 5/5/2019 and 5/5/2020.

SEC source: 0000310158-26-000042 · form4.xml · nonDerivative · entry 3

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,204.816

SEC source: 0000310158-26-000042 · form4.xml · nonDerivative · entry 2

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,604.816

SEC source: 0000310158-26-000042 · form4.xml · nonDerivative · entry 1

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,604.816

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000310158-26-000008 · form4.xml · nonDerivative · entry 1

Chattopadhyay Sanat · CIK 0001670690 · Exe V-P & Pres. MMD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,880

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

SEC source: 0000310158-26-000010 · form4.xml · nonDerivative · entry 1

Davis Robert M · CIK 0001363076 · Director · Chairman, CEO & President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 491,035.757

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

SEC source: 0000310158-26-000012 · form4.xml · nonDerivative · entry 1

DeLuca Richard R. · CIK 0001421339 · EVP&Pres, Merck Animal Heallth

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 197,858.834

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000014 · form4.xml · nonDerivative · entry 1

Guindo Chirfi · CIK 0001722753 · Chief Marketing Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,615.127

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000016 · form4.xml · nonDerivative · entry 1

Li Dean Y · CIK 0001837016 · Executive VP & President, MRL

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,270.05

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000018 · form4.xml · nonDerivative · entry 1

Litchfield Caroline · CIK 0001854928 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,192.194

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

SEC source: 0000310158-26-000020 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,197.389

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000022 · form4.xml · nonDerivative · entry 1

Romanelli Joseph · CIK 0001938322 · President, Human Health Int?l

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,739.343

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000024 · form4.xml · nonDerivative · entry 1

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,604.816

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000026 · form4.xml · nonDerivative · entry 1

Williams David Michael · CIK 0001820958 · EVP,Chief Info&Digital Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,837.743

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000028 · form4.xml · nonDerivative · entry 1

Zachary Jennifer · CIK 0001737231 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,915.671

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000002 · form4.xml · derivative · entry 2

Coe Mary Ellen · CIK 0001691304 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,231.5716

Underlying: Common Stock · 285.0086 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000004 · form4.xml · derivative · entry 2

GLOCER THOMAS H · CIK 0001140799 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,075.6744

Underlying: Common Stock · 463.1389 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-26-000006 · form4.xml · derivative · entry 2

Seidman Christine E · CIK 0001805745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,025.6686

Underlying: Common Stock · 77.1898 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-25-000061 · form4.xml · nonDerivative · entry 1

Downing Cristal N · CIK 0001879216 · Chief Comm. & Public Afrs Ofcr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

SEC source: 0000310158-25-000056 · form4.xml · nonDerivative · entry 1

Williams David Michael · CIK 0001820958 · EVP,Chief Info&Digital Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,578.031

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.5400 to $83.6200, inclusive. The reporting person undertakes to provide to Merck & Co., Inc., any security holder of Merck & Co., Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above in this footnote.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-25-000049 · form4.xml · derivative · entry 2

Coe Mary Ellen · CIK 0001691304 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,684.663

Underlying: Common Stock · 357.4407 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-25-000051 · form4.xml · derivative · entry 2

GLOCER THOMAS H · CIK 0001140799 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,645.8965

Underlying: Common Stock · 580.8412 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-25-000053 · form4.xml · derivative · entry 2

Seidman Christine E · CIK 0001805745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,775.7818

Underlying: Common Stock · 96.8069 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-25-000010 · form4.xml · derivative · entry 4

Guindo Chirfi · CIK 0001722753 · Chief Marketing Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 36,903 shares

Expires 2025-08-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F4 · derivative.exercise_date: These restricted stock units vested and were distributed as shares of Merck & Co., Inc. common stock in three equal installments on 8/3/2023, 8/3/2024 and 8/3/2025 or, if such date was not a business day, the business day immediately thereafter.

F4 · derivative.expiration_date: These restricted stock units vested and were distributed as shares of Merck & Co., Inc. common stock in three equal installments on 8/3/2023, 8/3/2024 and 8/3/2025 or, if such date was not a business day, the business day immediately thereafter.

SEC source: 0000310158-25-000010 · form4.xml · nonDerivative · entry 2

Guindo Chirfi · CIK 0001722753 · Chief Marketing Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,233.973

SEC source: 0000310158-25-000010 · form4.xml · nonDerivative · entry 1

Guindo Chirfi · CIK 0001722753 · Chief Marketing Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,408.973

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0000310158-25-000012 · form4.xml · derivative · entry 3

Williams David Michael · CIK 0001820958 · EVP,Chief Info&Digital Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17,119 shares

Expires 2025-08-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F3 · derivative.exercise_date: These restricted stock units vested and were distributed as shares of Merck & Co., Inc. common stock in one installment on 8/4/2025, the business day immediately following 8/3/2025. The Reporting Person's Form 4 filed on 8/4/2022 incorrectly reported that these restricted stock units vested and were to be distributed in three equal installments on 8/3/2023, 8/3/2024, and 8/3/2025.

F3 · derivative.expiration_date: These restricted stock units vested and were distributed as shares of Merck & Co., Inc. common stock in one installment on 8/4/2025, the business day immediately following 8/3/2025. The Reporting Person's Form 4 filed on 8/4/2022 incorrectly reported that these restricted stock units vested and were to be distributed in three equal installments on 8/3/2023, 8/3/2024, and 8/3/2025.

SEC source: 0000310158-25-000012 · form4.xml · nonDerivative · entry 2

Williams David Michael · CIK 0001820958 · EVP,Chief Info&Digital Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,013.467

SEC source: 0000310158-25-000012 · form4.xml · nonDerivative · entry 1

Williams David Michael · CIK 0001820958 · EVP,Chief Info&Digital Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,445.467

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-018460 · form4.xml · derivative · entry 2

Coe Mary Ellen · CIK 0001691304 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,051.7533

Underlying: Common Stock · 378.9793 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-018463 · form4.xml · derivative · entry 2

GLOCER THOMAS H · CIK 0001140799 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 104,040.6163

Underlying: Common Stock · 615.8413 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-018465 · form4.xml · derivative · entry 2

Seidman Christine E · CIK 0001805745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,495.8789

Underlying: Common Stock · 102.6402 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016340 · form4.xml · derivative · entry 2

BAKER DOUGLAS M JR · CIK 0001198753 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,343.5277

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016343 · form4.xml · derivative · entry 2

Coe Mary Ellen · CIK 0001691304 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,672.774

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016345 · form4.xml · derivative · entry 2

Craig Pamela J. · CIK 0001232910 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,990.792

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016347 · form4.xml · derivative · entry 2

GLOCER THOMAS H · CIK 0001140799 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 103,424.775

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016350 · form4.xml · derivative · entry 2

Karsanbhai Surendralal Lanca · CIK 0001754881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,421.484

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016354 · form4.xml · derivative · entry 2

LAVIZZO-MOUREY RISA J · CIK 0001034465 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,367.349

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016360 · form4.xml · derivative · entry 2

Mayo Stephen · CIK 0001849061 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,539.8325

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016365 · form4.xml · derivative · entry 2

Rothman Paul · CIK 0001601332 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,990.803

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016367 · form4.xml · derivative · entry 2

RUSSO PATRICIA F · CIK 0001023219 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 58,523.428

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016370 · form4.xml · derivative · entry 2

Seidman Christine E · CIK 0001805745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,393.2387

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016373 · form4.xml · derivative · entry 2

THULIN INGE G · CIK 0001263739 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,764.29

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-016390 · form4.xml · derivative · entry 2

Warden Kathy J · CIK 0001559112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,503.599

Underlying: Common Stock · 2,863.0921 shares

Expires not disclosed

F1 · derivative.exercise_price: 1-for-1

F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation.

F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-013348 · form4.xml · derivative · entry 6

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,532 shares

Expires 2025-05-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F3 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in equal, annual installments with one installment having vested on 5/3/2024 and the last installment having vested on 5/3/2025.

SEC source: 0001127602-25-013348 · form4.xml · derivative · entry 5

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 518 shares

Expires 2025-05-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F3 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in equal, annual installments with one installment having vested on 5/3/2024 and the last installment having vested on 5/3/2025.

SEC source: 0001127602-25-013348 · form4.xml · nonDerivative · entry 4

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,538.802

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

SEC source: 0001127602-25-013348 · form4.xml · nonDerivative · entry 3

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,126.802

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001127602-25-013348 · form4.xml · nonDerivative · entry 2

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,594.802

SEC source: 0001127602-25-013348 · form4.xml · nonDerivative · entry 1

Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,850.802

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.