1 unchanged sentence
Insider Trading Arrangements
−Removed: During the three months ended September 30, 2024, none of the Company’s directors or executive officers adopted or terminated any Rule 10b5-1 trading arrangements or non-Rule 10b5-1 trading arrangements.
+Added: During the three months ended March 31, 2025, none of the Company’s directors or executive officers adopted or terminated any Rule 10b5-1 trading arrangements or non-Rule 10b5-1 trading arrangements.
Number Description
2 unchanged sentences
3.2 — By-Laws of Merck & Co., Inc.
−Removed: (effective March 22, 2022) – Incorporated by reference to Merck & Co., Inc.'s Current Report on Form 8-K filed on March 25, 2022 (No.
+Added: (effective November 19.
+Added: 2024) – Incorporated by reference to Merck & Co., Inc.'s Current Report on Form 8-K filed on November 22, 2024 (No.
31.1 — Rule 13a – 14(a)/15d – 14(a) Certification of Chief Executive Officer
11 unchanged sentences
MERCK & CO., INC.
−Removed: November 6, 2024 /s/ Jennifer Zachary
+Added: May 2, 2025 /s/ Jennifer Zachary
JENNIFER ZACHARY
Executive Vice President and General Counsel
−Removed: November 6, 2024 /s/ Dalton Smart
+Added: May 2, 2025 /s/ Dalton Smart
Senior Vice President Finance - Global Controller
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.