Chirfi Guindo - 04 Aug 2025 Form 4 Insider Report for Merck & Co., Inc. (MRK)

Role
Chief Marketing Officer
Signature
/s/ Kelly Grez, as attorney-in-fact for Mr. Chirfi Guindo
Issuer symbol
MRK
Transactions as of
04 Aug 2025
Transactions value $
$1,484,943
Form type
4
Filing time
05 Aug 2025, 08:43:24 UTC
Previous filing
06 Jun 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Guindo Chirfi Chief Marketing Officer MERCK & CO., INC., 126 EAST LINCOLN AVENUE, RAHWAY /s/ Kelly Grez, as attorney-in-fact for Mr. Chirfi Guindo 05 Aug 2025 0001722753

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MRK Common Stock Options Exercise $2.93M +36.9K +52.34% $79.29 107K 04 Aug 2025 Direct F1
transaction MRK Common Stock Tax liability -$1.44M -18.2K -16.92% $79.29 89.2K 04 Aug 2025 Direct
holding MRK Common Stock-401(k) Plan 56 04 Aug 2025 By 401(k) F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

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 -36.9K -100% $0.00 0 04 Aug 2025 Common Stock 36.9K Direct F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.