FibroBiologics, Inc. Common Stock (FBLG) ownership: Top institutional holder: VANGUARD GROUP INC ($273677.00). Insider activity: Net Seller (7 buys, 13 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 1216341.00 | $273677.00 | 2025-12-31 |
| CITADEL ADVISORS LLC | 211139.00 | $115324.00 | 2025-09-30 |
| VANGUARD CAPITAL MANAGEMENT LLC | 67665.00 | $89318.00 | 2026-03-31 |
| Fund Evaluation Group, LLC | 51794.00 | $68368.00 | 2026-03-31 |
| MILLENNIUM MANAGEMENT LLC | 288496.00 | $64883.00 | 2025-12-31 |
| Bank of New York Mellon Corp | 51420.00 | $46279.00 | 2025-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 29609.00 | $39093.00 | 2026-03-31 |
| JANE STREET GROUP, LLC | 149763.00 | $33682.00 | 2025-12-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-23 | |
| Sell | null | 2026-06-23 | |
| Sell | null | 2026-06-23 | |
| Sell | null | 2026-06-23 | |
| Sell | null | 2026-05-04 | |
| Sell | null | 2026-05-04 | |
| Sell | null | 2026-05-04 | |
| Sell | null | 2026-05-04 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.