Quick Takeaways
- Fairmount Funds Management LLC filed SCHEDULE 13D/A for Cogent Biosciences, Inc. Common Stock, $0.001 par value (COGT).
- Disclosed ownership: 8.6%.
- Date of event: 31 Mar 2026.
Fairmount Funds Management LLC - 31 Mar 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
- Symbol
- COGT
- Shares outstanding
- 178,568,814 shares
- Disclosed Ownership
- 15,356,918 shares
- Ownership
- 8.6%
- Form type
- SCHEDULE 13D/A
- Filing time
- 31 Mar 2026, 21:30:05 UTC
- Date of event
- 31 Mar 2026
- Previous filing
- 22 Jan 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"Fairmount Funds Management LLC disclosed 8.6% ownership in Cogent Biosciences, Inc. Common Stock, $0.001 par value (COGT) on 31 Mar 2026."
What Changed
- Previous schedule filing date: 22 Jan 2026.
- Current filing was accepted on 31 Mar 2026, 21:30.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Official SEC Source
Backed by Schedule 13D/13G
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
See Original FilingReporting Managers (2)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Fairmount Funds Management LLC | 8.6% | 15,356,918 | 0 | 15,356,918 | /s/ Peter Harwin | Peter Harwin, Managing Member | 0001802528 |
| Fairmount Healthcare Fund II GP LLC | 8.6% | 15,356,918 | 0 | 15,356,918 | /s/ Peter Harwin | Peter Harwin, Managing Member | 0001830382 |