Jennifer Zachary - 12 Aug 2026 Form 4 Insider Report for Merck & Co., Inc. (MRK)

Reporting relationship: EVP, General Counsel
Issuer ticker: MRK
Reported as of: 12 Aug 2026
Net transaction value: -$10,718,495
SEC form: 4
Accepted by SEC: 13 Aug 2026, 16:11:35 UTC
Prior SEC filing: 02 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Kelly E. W. Grez as Attorney-in-Fact for Jennifer Zachary

Key filing fact

Jennifer Zachary filed Form 4 for Merck & Co., Inc. (MRK) on 13 Aug 2026.

Key facts

This page summarizes Jennifer Zachary's Form 4 filing for Merck & Co., Inc. (MRK).
5 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 13 Aug 2026, 16:11.

Change

Previous filing in this sequence was filed on 02 Jun 2026.
Current net transaction value: -$10,718,495.

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 0001737231 Primary reporting owner

Zachary Jennifer

Relationship: EVP, General Counsel
Address: MERCK & CO., INC., 126 EAST LINCOLN AVENUE, RAHWAY
Signature: /s/ Kelly E. W. Grez as Attorney-in-Fact for Jennifer Zachary
Signature date: 13 Aug 2026

Reported non-derivative transactions

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

MRK transaction

Common Stock

Options Exercise

Transaction value
Shares: +41,494
Change %: +59%
Price: $117.89^*
Shares after: 112,391
Date: 12 Aug 2026
Ownership: Direct

MRK transaction

Common Stock

Options Exercise

Transaction value
Shares: +13,433
Change %: +12%
Price: $84.71^*
Shares after: 125,824
Date: 12 Aug 2026
Ownership: Direct

MRK transaction

Common Stock

Sale

Transaction value: $10,718,495
Shares: -80,315
Change %: -64%
Price: $133.46
Shares after: 45,509
Date: 12 Aug 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

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

MRK transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -41,494
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 12 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 41,494
Exercise price: $117.89
Footnotes: F2

MRK transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -13,433
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 12 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 13,433
Exercise price: $84.71
Footnotes: 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

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $133.0300 to $133.5000, inclusive. The reporting person undertakes to provide to Merck & Co., Inc., any security holder of Merck & Co., Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above in this footnote.

Footnote F2

The options vested and became exercisable in equal installments on 5/2/2024, 5/2/2025 and 5/2/2026.

Footnote F3

The options vest and become exercisable in equal installments on 4/29/2026, 4/29/2027, and 4/29/2028.