FibrobiologicsFBLG
13F holders, Q4 2025 (December 31)At the end of Q4 2025, 46 institutions reported holding Fibrobiologics Inc. (FBLG) in their 13F filings, down 9 from Q3 2025. 6 opened new positions and 15 sold out. The largest holders were Vanguard Group Inc. ($274K), BlackRock, Inc. ($108K) and Geode Capital Management, LLC ($78K). 3 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Steve Cohen (0.0% of Point72 Asset Management's portfolio).
- Company
- Fibrobiologics Inc.
- CUSIP
- 31573L105
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 6 | $85K |
| Exits | 15 | $1.1M |
All 13F filers, Q3 2025 → Q4 2025: 726,477 shares bought and 1,702,169 shares sold, net −975,692 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 46 holders
| Vanguard Group Inc. | 0.00% | Reduce -1.4% | 1,216,341 | $274K |
| BlackRock, Inc. | 0.00% | Add +9.7% | 482,401 | $108K |
| Geode Capital Management, LLC | 0.00% | Add +20.7% | 348,761 | $78K |
| Cascade Financial Partners, LLC | 0.01% | Add +5.5% | 314,581 | $71K |
| Millennium Management | 0.00% | Reduce -35.3% | 288,496 | $65K |
| Renaissance Technologies | 0.00% | Add +287.3% | 231,600 | $52K |
| Jane Street Group, LLC | 0.00% | New | 149,763 | $34K |
| AMG National Trust Bank | 0.00% | New | 138,960 | $31K |
| UBS Group AG | 0.00% | Add +56.0% | 120,770 | $27K |
| State Street Corp. | 0.00% | No change | 111,300 | $25K |
| Optivise Advisory Services LLC | 0.01% | No change | 110,100 | $25K |
| Requisite Capital Management, LLC | 0.00% | No change | 109,713 | $25K |
| &partners | 0.00% | No change | 100,000 | $22K |
| Cerity Partners LLC | 0.00% | Reduce -25.4% | 93,919 | $21K |
| American Institute for Advanced Investment Management, LLP | 0.01% | No change | 88,206 | $20K |
| Saxon Interests, Inc. | 0.00% | Add +38.3% | 57,000 | $13K |
| Bank of America Corp. | 0.00% | Add +0.0% | 48,176 | $11K |
| Northern Trust Corp. | 0.00% | No change | 47,674 | $11K |
| RMR Wealth Builders | 0.00% | No change | 38,360 | $9K |
| XTX Topco Ltd | 0.00% | New | 37,919 | $9K |
| Concurrent Investment Advisors, LLC | 0.00% | No change | 35,283 | $8K |
| DRW Securities, LLC | 0.00% | New | 33,348 | $7K |
| Ethos Financial Group, LLC | 0.00% | No change | 24,424 | $5K |
| Raymond James Financial Inc. | 0.00% | No change | 18,642 | $4K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +6.8% | 18,109 | $4K |
| Cetera Investment Advisers | 0.00% | No change | 18,006 | $4K |
| NewEdge Advisors, LLC | 0.00% | No change | 16,906 | $4K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -43.8% | 16,836 | $4K |
| Flaharty Asset Management, LLC | 0.00% | No change | 14,702 | $3K |
| Cahaba Wealth Management, Inc. | 0.00% | No change | 14,702 | $3K |
| Point72 Asset Management | 0.00% | New | 14,476 | $3K |
| Brooklyn Investment Group | 0.00% | No change | 11,500 | $3K |
| Goldman Sachs Group Inc. | 0.00% | No change | 10,468 | $2K |
| Global Assets Advisory, LLC | 0.00% | Reduce -2.3% | 10,450 | $2K |
| CWA Asset Management Group, LLC | 0.00% | No change | 10,000 | $2K |
| Osaic Holdings, Inc. | 0.00% | Reduce -25.0% | 6,000 | $1K |
| Islay Capital Management, LLC | 0.00% | No change | 3,391 | $763 |
| Grove Bank & Trust | 0.00% | No change | 2,000 | $450 |
| Disciplined Equity Management, Inc. | 0.00% | New | 1,000 | $418 |
| BNP Paribas Financial Markets | 0.00% | No change | 1,306 | $294 |
| Allworth Financial LP | 0.00% | No change | 261 | $59 |
| Wells Fargo & Company | 0.00% | No change | 200 | $45 |
| Optiver Holding B.V. | 0.00% | No change | 26 | $6 |
| Deutsche Bank AG | 0.00% | No change | 18 | $4 |
| Barclays PLC | 0.00% | No change | 1 | $0 |
| Royal Bank of Canada | 0.00% | Reduce -8.4% | 1,842 | $0 |
"% of holder's portfolio" is FBLG's weight in each manager's 13F, not the share of Fibrobiologics Inc. the manager owns.