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

Aug 5, 2025

284_dirs_2025-08-05_1d9a21c1-804d-409d-9574-0e891bf33302.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: Williams David Michael (EVP,Chief Info&Digital Officer)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2025-08-04 Common Stock M 17119 $79.29 Acquired 41445.467 Direct
2025-08-04 Common Stock F 8432 $79.29 Disposed 33013.467 Direct

Derivative Transactions

Date Security Exercise Price Code Shares A/D Expiration Underlying Ownership
2025-08-04 Restricted Stock Unit $ M 17119 Disposed 2025-08-03 Common Stock (17119) Direct

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

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

F3: 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.