FibrobiologicsFBLG
13F holders, Q3 2025 (September 30)At the end of Q3 2025, 55 institutions reported holding Fibrobiologics Inc. (FBLG) in their 13F filings, down 3 from Q2 2025. 9 opened new positions and 12 sold out. The largest holders were Vanguard Group Inc. ($674K), Luminus Management LLC ($346K) and Yorkville Advisors Global, LP ($278K). 3 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Fibrobiologics Inc.
- CUSIP
- 31573L105
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 9 | $755K |
| Exits | 12 | $314K |
All 13F filers, Q2 2025 → Q3 2025: 849,883 shares bought and 1,416,477 shares sold, net −566,594 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 55 holders
| Vanguard Group Inc. | 0.00% | No change | 1,233,781 | $674K |
| Luminus Management LLC | 0.31% | New | 26,629 | $346K |
| Yorkville Advisors Global, LP | 0.11% | Reduce -39.6% | 509,787 | $278K |
| Millennium Management | 0.00% | Reduce -7.2% | 446,208 | $244K |
| BlackRock, Inc. | 0.00% | Reduce -41.4% | 439,773 | $240K |
| Landscape Capital Management, L.L.C. | 0.01% | New | 350,000 | $191K |
| GTS Securities LLC | 0.01% | New | 308,661 | $169K |
| Cascade Financial Partners, LLC | 0.02% | Add +2.6% | 298,081 | $163K |
| Geode Capital Management, LLC | 0.00% | No change | 288,948 | $158K |
| Citadel Advisors | 0.00% | Reduce -9.5% | 211,139 | $115K |
| Cerity Partners LLC | 0.00% | Reduce -1.7% | 125,919 | $69K |
| State Street Corp. | 0.00% | Reduce -3.6% | 111,300 | $61K |
| Optivise Advisory Services LLC | 0.04% | No change | 110,100 | $60K |
| Requisite Capital Management, LLC | 0.01% | No change | 109,713 | $60K |
| &partners | 0.00% | Add +42.9% | 100,000 | $55K |
| American Institute for Advanced Investment Management, LLP | 0.03% | No change | 88,206 | $48K |
| UBS Group AG | 0.00% | Reduce -29.8% | 77,434 | $42K |
| Renaissance Technologies | 0.00% | New | 59,800 | $33K |
| Bank of America Corp. | 0.00% | Add +0.9% | 48,175 | $26K |
| Northern Trust Corp. | 0.00% | Reduce -0.9% | 47,674 | $26K |
| Saxon Interests, Inc. | 0.01% | Add +94.3% | 41,214 | $24K |
| HRT Financial LP | 0.00% | Add +16.8% | 44,145 | $24K |
| RMR Wealth Builders | 0.00% | No change | 38,360 | $21K |
| Concurrent Investment Advisors, LLC | 0.00% | No change | 35,283 | $19K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -12.1% | 29,966 | $16K |
| Ethos Financial Group, LLC | 0.00% | Reduce -50.0% | 24,424 | $13K |
| Raymond James Financial Inc. | 0.00% | No change | 18,642 | $10K |
| Cetera Investment Advisers | 0.00% | Reduce -5.3% | 18,006 | $10K |
| LPL Financial LLC | 0.00% | Add +39.8% | 17,570 | $10K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +11.4% | 16,962 | $9K |
| NewEdge Advisors, LLC | 0.00% | Reduce -26.2% | 16,906 | $9K |
| Flaharty Asset Management, LLC | 0.00% | No change | 14,702 | $8K |
| Cahaba Wealth Management, Inc. | 0.00% | No change | 14,702 | $8K |
| Brooklyn Investment Group | 0.00% | No change | 11,500 | $7K |
| Global Assets Advisory, LLC | 0.00% | New | 10,700 | $6K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -92.0% | 10,468 | $6K |
| Runnymede Capital Advisors, Inc. | 0.00% | New | 10,000 | $5K |
| CWA Asset Management Group, LLC | 0.00% | New | 10,000 | $5K |
| Osaic Holdings, Inc. | 0.00% | No change | 8,000 | $5K |
| Islay Capital Management, LLC | 0.00% | Add +653.6% | 3,391 | $2K |
| Grove Bank & Trust | 0.00% | No change | 2,000 | $1K |
| Royal Bank of Canada | 0.00% | Add +6.0% | 2,010 | $1K |
| BNP Paribas Financial Markets | 0.00% | Reduce -24.0% | 1,306 | $713 |
| FMR LLC | 0.00% | Reduce -63.6% | 1,200 | $655 |
| Allworth Financial LP | 0.00% | No change | 261 | $143 |
| Wells Fargo & Company | 0.00% | Reduce -72.4% | 200 | $109 |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -57.4% | 52 | $28 |
| Optiver Holding B.V. | 0.00% | New | 26 | $14 |
| Deutsche Bank AG | 0.00% | No change | 18 | $10 |
| Morgan Stanley | 0.00% | Reduce -99.8% | 13 | $7 |
| True Wealth Design, LLC | 0.00% | Reduce -94.8% | 10 | $6 |
| Barclays PLC | 0.00% | No change | 1 | $1 |
| Arax Advisory Partners | 0.00% | New | 2 | $1 |
| IFP Advisors, Inc | 0.00% | No change | 2 | $1 |
| Cwm, LLC | 0.00% | Reduce -92.8% | 259 | $0 |
"% of holder's portfolio" is FBLG's weight in each manager's 13F, not the share of Fibrobiologics Inc. the manager owns.