| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Williams David Michael | EVP,Chief Info&Digital Officer | MERCK & CO., INC., 126 EAST LINCOLN AVENUE, RAHWAY | /s/ Kelly E. W. Grez as Attorney-in-Fact for David Michael Williams | 05 Aug 2025 | 0001820958 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MRK | Common Stock | Options Exercise | $1,357,366 | +17,119 | +70% | $79.29 | 41,445 | 04 Aug 2025 | Direct | F1 |
| transaction | MRK | Common Stock | Tax liability | $668,573 | -8,432 | -20% | $79.29 | 33,013 | 04 Aug 2025 | Direct |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MRK | Restricted Stock Unit | Options Exercise | $0 | -17,119 | -100% | $0.000000 | 0 | 04 Aug 2025 | Common Stock | 17,119 | Direct | F2, F3 |
| Id | Content |
|---|---|
| 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. |