1 unchanged sentence
Insider Trading Arrangements
−Removed: During the three months ended September 30, 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.
+Added: During the three months ended March 31, 2026, none of the Company’s directors or executive officers adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each item is defined in Item 408 of Regulation S-K.
Number Description
17 unchanged sentences
MERCK & CO., INC.
−Removed: November 5, 2025 /s/ Jennifer Zachary
+Added: May 4, 2026 /s/ Jennifer Zachary
JENNIFER ZACHARY
Executive Vice President and General Counsel
−Removed: November 5, 2025 /s/ Dalton Smart
+Added: May 4, 2026 /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.