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Merck & Co., Inc. Director's Dealing 2025

Aug 5, 2025

284_dirs_2025-08-05_74060d92-02ab-4a44-9fde-4584f43ab5e5.zip

Director's Dealing

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SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2025-08-04

Reporting Person: Guindo Chirfi (Chief Marketing Officer)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2025-08-04 Common Stock M 36903 $79.29 Acquired 107408.973 Direct
2025-08-04 Common Stock F 18175 $79.29 Disposed 89233.973 Direct

Derivative Transactions

Date Security Exercise Price Code Shares A/D Expiration Underlying Ownership
2025-08-04 Restricted Stock Unit $ M 36903 Disposed 2025-08-03 Common Stock (36903) Direct

Holdings (Non-Derivative)

Security Shares Ownership
Common Stock-401(k) Plan 55.9641 Indirect

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

F2: Includes shares acquired and dividends earned through July 8, 2025 in the Merck U.S. Savings Plan, a 401(k) plan.

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

F4: 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.