MRK

SEC source: 0001127602-24-005191 · 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: 389,835.757

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: 0001127602-24-004438 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 14,702 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.

F3 · derivative.exercise_price: Exercise price and holdings reflect the adjustments that occurred as of June 2, 2021 in connection with the Organon & Co. ("Organon") spin-off as described in the registration statement on Form 10 filed with the SEC by Organon (the "Form 10"). As reported in the Form 10, all Merck stock option awards outstanding as of immediately prior to the distribution date were converted on the distribution date into adjusted Merck awards for Merck employees to preserve the same intrinsic value and general terms and conditions (including vesting) as were in place immediately prior to the adjustments.

F4 · derivative.exercise_date: The option became exercisable in equal installments on 5/5/2018, 5/5/2019 and 5/5/2020.

SEC source: 0001127602-24-004438 · form4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,242.37

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.4900 to $125.5330, 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 in this footnote.

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

SEC source: 0001127602-24-004438 · 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: 60,944.37

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: 0001127602-24-003969 · 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: 19,811.667

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

SEC source: 0001127602-24-003093 · form4.xml · derivative · entry 3

Zachary Jennifer · CIK 0001737231 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,835

Underlying: Common Stock · 19,417 shares

Expires 2032-05-02

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_date: The option vests and becomes exercisable in equal installments on 5/3/2023, 5/3/2024 and 5/3/2025.

SEC source: 0001127602-24-003093 · form4.xml · nonDerivative · entry 2

Zachary Jennifer · CIK 0001737231 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,057.76

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.8650 to $127.3000, 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 in this footnote.

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

SEC source: 0001127602-24-003093 · form4.xml · nonDerivative · entry 1

Zachary Jennifer · CIK 0001737231 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,556.76

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: 0001127602-24-003099 · form4.xml · derivative · entry 5

MIZELL STEVEN · CIK 0001189403 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,088

Underlying: Common Stock · 32,170 shares

Expires 2031-05-03

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.

F3 · derivative.exercise_date: The option vests and becomes exercisable in three equal installments on 5/4/2022, 5/4/2023 and 5/4/2024.

SEC source: 0001127602-24-003099 · form4.xml · derivative · entry 4

MIZELL STEVEN · CIK 0001189403 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 824 shares

Expires 2028-10-29

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_date: The option vested and became exercisable in three equal installments on 10/30/2019, 10/30/2020 and 10/30/2021.

SEC source: 0001127602-24-003099 · form4.xml · nonDerivative · entry 3

MIZELL STEVEN · CIK 0001189403 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,619.145

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.4300 to $126.9000, 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 in this footnote.

SEC source: 0001127602-24-003099 · form4.xml · nonDerivative · entry 2

MIZELL STEVEN · CIK 0001189403 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,313.145

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: 0001127602-24-003099 · form4.xml · nonDerivative · entry 1

MIZELL STEVEN · CIK 0001189403 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,143.145

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: 0001127602-24-003352 · form4.xml · derivative · entry 7

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,240

Underlying: Common Stock · 7,119 shares

Expires 2032-05-02

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.

F4 · derivative.exercise_date: The option vests and becomes exercisable in three equal installments on 5/3/2023, 5/3/2024 and 5/3/2025.

SEC source: 0001127602-24-003352 · form4.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,049

Underlying: Common Stock · 7,045 shares

Expires 2031-05-03

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.

F3 · derivative.exercise_date: The option vests and becomes exercisable in three equal installments on 5/4/2022, 5/4/2023 and 5/4/2024.

SEC source: 0001127602-24-003352 · form4.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,773 shares

Expires 2030-04-30

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_date: The option vested and became exercisable in three equal installments on 5/1/2021, 5/1/2022 and 5/1/2023.

SEC source: 0001127602-24-003352 · form4.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,327.345

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

SEC source: 0001127602-24-003352 · form4.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,286.345

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: 0001127602-24-003352 · form4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,167.345

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: 0001127602-24-003352 · 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: 28,122.345

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: 0001127602-24-002008 · form4.xml · nonDerivative · entry 1

Klobuchar Michael A · CIK 0001871957 · EVP - Chief Strategy Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,098.138

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

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

SEC source: 0001127602-24-002011 · form4.xml · nonDerivative · entry 1

Litchfield Caroline · CIK 0001854928 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,908.194

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

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

SEC source: 0001127602-24-002015 · 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: 26,716

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

SEC source: 0001127602-24-002019 · 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: 135,782.983

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

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

SEC source: 0001127602-24-002022 · 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: 348,326.757

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

SEC source: 0001127602-24-002024 · 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: 46,242.37

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

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

SEC source: 0001127602-24-002026 · form4.xml · nonDerivative · entry 1

Zachary Jennifer · CIK 0001737231 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,139.76

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

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

SEC source: 0001127602-24-002034 · form4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,667.245

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

SEC source: 0001127602-24-002029 · form4.xml · nonDerivative · entry 1

MIZELL STEVEN · CIK 0001189403 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,319.145

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

SEC source: 0001127602-24-002032 · 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: 21,262.667

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

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

SEC source: 0001127602-24-002036 · 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: 21,349.345

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

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

SEC source: 0001127602-24-000129 · form4.xml · derivative · entry 2

Coe Mary Ellen · CIK 0001691304 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,688.395

Underlying: Common Stock · 275.1789 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: 0001127602-24-000133 · form4.xml · derivative · entry 2

GLOCER THOMAS H · CIK 0001140799 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,419.173

Underlying: Common Stock · 412.7683 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: 0001127602-24-000138 · form4.xml · derivative · entry 2

Seidman Christine E · CIK 0001805745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,775.2157

Underlying: Common Stock · 74.5276 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: 0001127602-24-000142 · form4.xml · derivative · entry 2

WENDELL PETER C · CIK 0001032635 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,715.506

Underlying: Common Stock · 275.1789 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: 0001127602-23-027135 · 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: 18,190.657

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

SEC source: 0001127602-23-027077 · 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: 111,763.592

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.0000 to $105.0750, 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: 0001127602-23-026457 · form4.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,685

Underlying: Common Stock · 11,685 shares

Expires 2026-10-31

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F2 · derivative.exercise_date: These restricted stock units vest in full and are distributed as shares of Merck & Co., Inc. common stock on 10/31/2026.

SEC source: 0001127602-23-026390 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 915 shares

Expires 2023-10-30

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 three equal installments on 10/30/2021, 10/30/2022 and 10/30/2023.

SEC source: 0001127602-23-026390 · form4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,271.657

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

SEC source: 0001127602-23-026390 · 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: 20,722.657

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: 0001127602-23-025088 · form4.xml · derivative · entry 2

Coe Mary Ellen · CIK 0001691304 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,272.7991

Underlying: Common Stock · 291.4036 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: 0001127602-23-025095 · form4.xml · derivative · entry 2

GLOCER THOMAS H · CIK 0001140799 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,370.9857

Underlying: Common Stock · 437.1054 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: 0001127602-23-025114 · form4.xml · derivative · entry 2

Seidman Christine E · CIK 0001805745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,612.6101

Underlying: Common Stock · 78.9218 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: 0001127602-23-025134 · form4.xml · derivative · entry 2

WENDELL PETER C · CIK 0001032635 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 122,580.9571

Underlying: Common Stock · 291.4036 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: 0001127602-23-022547 · form4.xml · nonDerivative · entry 1

MIZELL STEVEN · CIK 0001189403 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,935.145

SEC source: 0001127602-23-022002 · form4.xml · nonDerivative · entry 1

MIZELL STEVEN · CIK 0001189403 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,185.145

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.4800 to $105.4900, 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.

SEC source: 0001127602-23-022015 · form4.xml · derivative · entry 4

Guindo Chirfi · CIK 0001722753 · Chief Marketing Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,804

Underlying: Common Stock · 36,901 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 vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 8/3/2023, 8/3/2024 and 8/3/2025.

SEC source: 0001127602-23-022015 · form4.xml · nonDerivative · entry 2

Guindo Chirfi · CIK 0001722753 · Chief Marketing Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,352.684

SEC source: 0001127602-23-022015 · form4.xml · nonDerivative · entry 1

Guindo Chirfi · CIK 0001722753 · Chief Marketing Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,341.684

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.