Merck & Co., Inc.

MRK·NYSE·$119.76Share Price as of 11/2·$296BMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/07/26 10-QQ1 ended 03/31/2605/04/26 10-KFY 202502/24/26 10-QQ3 ended 09/30/2511/05/25 10-QQ2 ended 06/30/2508/05/25

Disclosures

8-KCurrent report10/29/26 8-KCurrent report10/13/26 8-KCurrent report08/04/26 8-KCurrent report05/28/26 8-KCurrent report05/22/26

Prospectuses and Registrations

424B5Prospectus supplement05/20/26 FWPFree writing prospectus05/19/26 424B5Prospectus supplement05/18/26 424B5Prospectus supplement12/03/25 FWPFree writing prospectus12/02/25

Proxies

DEF 14ADefinitive proxy04/08/26 DEFA14AAdditional proxy materials04/08/26 PX14A6GLetter to shareholders05/07/25 PX14A6GLetter to shareholders04/24/25 PX14A6GLetter to shareholders04/14/25

Ownership

3/AInitial insider ownership (amended)10/22/26 Form 4Insider transaction10/01/26 Form 4Insider transaction10/01/26 Form 4Insider transaction10/01/26 Form 3Initial insider ownership09/01/26

Other

25-NSERemoval from listing10/15/26 11-KEmployee stock purchase plan report06/24/26 11-KEmployee stock purchase plan report06/24/26 11-KEmployee stock purchase plan report06/24/26 SDConflict Minerals disclosure05/29/26