Fairmount Funds Management LLC - 22 Jan 2026 SCHEDULE 13D/A Report for Cogent Biosciences, Inc. Common Stock, $0.001 par value (COGT)

Filing Manager
Fairmount Funds Management LLC
Reporting Manager
Fairmount Funds Management LLC
Security
Cogent Biosciences, Inc. Common Stock, $0.001 par value
Symbol
COGT
Shares outstanding
164,261,798 shares
Disclosed Ownership
16,261,918 shares
Ownership
9.9%
Form type
SCHEDULE 13D/A
Filing time
22 Jan 2026, 20:02:12 UTC
Date of event
22 Jan 2026
Previous filing
17 Nov 2025
SEC
View on sec.gov

Reporting Managers (2)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Fairmount Funds Management LLC 9.9% 16,261,918 0 16,261,918 /s/ Peter Harwin Peter Harwin, Managing Member 0001802528
Fairmount Healthcare Fund II GP LLC 9.9% 16,261,918 0 16,261,918 /s/ Peter Harwin Peter Harwin, Managing Member 0001830382