Cogent Biosciences, Inc.

COGT·NASDAQ·$33.94Share Price as of 11/2·$6BMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/10/26 10-QQ1 ended 03/31/2605/05/26 10-KFY 202502/17/26 10-QQ3 ended 09/30/2511/07/25 10-QQ2 ended 06/30/2508/05/25

Disclosures

8-KCurrent report09/02/26 8-KCurrent report08/10/26 8-KCurrent report08/10/26 8-KCurrent report06/11/26 8-KCurrent report05/05/26

Prospectuses and Registrations

424B5Prospectus supplement08/10/26 S-8Registration of securities for employees02/17/26 424B5Prospectus supplement11/12/25 424B5Prospectus supplement11/12/25 424B5Prospectus supplement11/12/25

Proxies

DEF 14ADefinitive proxy04/23/26 DEFA14AAdditional proxy materials04/23/26 DEF 14ADefinitive proxy04/22/25 DEFA14AAdditional proxy materials04/22/25 PRE 14APreliminary proxy04/11/25

Ownership

Form 4Insider transaction10/05/26 Form 4Insider transaction08/31/26 144Proposed sale of securities08/27/26 SC 13G/ABeneficial ownership (amended)08/13/26 SC 13GBeneficial ownership07/31/26

Other

ARSAnnual report to shareholders04/23/26 EFFECTRequest for effectiveness05/09/25 ARSAnnual report to shareholders04/22/25 ARSAnnual report to shareholders04/23/24 EFFECTRequest for effectiveness04/10/24