Stephen Mayo - 29 May 2026 Form 4 Insider Report for Merck & Co., Inc. (MRK)

Reporting relationship: Director
Issuer ticker: MRK
Reported as of: 29 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Jun 2026, 14:11:37 UTC
Prior SEC filing: 13 Mar 2026
Next SEC filing: 05 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Kelly E. W. Grez as attorney-in-fact for Stephen L. Mayo

Key filing fact

Stephen Mayo filed Form 4 for Merck & Co., Inc. (MRK) on 02 Jun 2026.

Key facts

This page summarizes Stephen Mayo's Form 4 filing for Merck & Co., Inc. (MRK).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 02 Jun 2026, 14:11.

Change

Previous filing in this sequence was filed on 13 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001849061 Primary reporting owner

Mayo Stephen

Relationship: Director
Address: MERCK & CO., INC., 126 EAST LINCOLN AVENUE, RAHWAY
Signature: /s/ Kelly E. W. Grez as attorney-in-fact for Stephen L. Mayo
Signature date: 02 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MRK holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 100
Date: 29 May 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MRK transaction Derivative

Phantom Stock

Award

Transaction value
Shares: +1,853
Change %: +14%
Price: $118.72^*
Shares after: 14,825
Date: 29 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,853
Exercise price
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

1-for-1

Footnote F2

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.

Footnote F3

Holdings include shares acquired in dividend reinvestment transactions.