FibrobiologicsFBLG
13F holders, Q1 2025 (March 31)65holders +1
7new positions
6sold out
2famous investors
$0.90avg. 13F price*
At the end of Q1 2025, 65 institutions reported holding Fibrobiologics Inc. (FBLG) in their 13F filings, up 1 from Q4 2024. 7 opened new positions and 6 sold out. The largest holders were BlackRock, Inc. ($1.6M), Vanguard Group Inc. ($1.3M) and Geode Capital Management, LLC ($553K). 2 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Fibrobiologics Inc.
- CUSIP
- 31573L105
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 7 | $114K |
| Exits | 6 | $264K |
All 13F filers, Q4 2024 → Q1 2025: 779,070 shares bought and 280,964 shares sold, net +498,106 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 65 holders
| BlackRock, Inc. | 0.00% | Reduce -1.1% | 1,765,630 | $1.6M |
| Vanguard Group Inc. | 0.00% | Add +55.8% | 1,420,419 | $1.3M |
| Geode Capital Management, LLC | 0.00% | Add +1.6% | 614,639 | $553K |
| State Street Corp. | 0.00% | Reduce -1.4% | 566,452 | $510K |
| Cascade Financial Partners, LLC | 0.03% | Reduce -8.0% | 260,081 | $234K |
| Northern Trust Corp. | 0.00% | Reduce -4.3% | 206,115 | $186K |
| UBS Group AG | 0.00% | Reduce -12.0% | 112,859 | $102K |
| Optivise Advisory Services LLC | 0.06% | No change | 110,100 | $99K |
| Requisite Capital Management, LLC | 0.02% | No change | 109,713 | $99K |
| Cerity Partners LLC | 0.00% | Add +19.6% | 93,407 | $84K |
| Bank of America Corp. | 0.00% | Add +2.4% | 92,039 | $83K |
| American Institute for Advanced Investment Management, LLP | 0.06% | No change | 88,206 | $79K |
| Bridgeway Capital Management, LLC | 0.00% | Add +200.0% | 75,000 | $68K |
| Charles Schwab Investment Management Inc. | 0.00% | Add +0.1% | 69,805 | $63K |
| Goldman Sachs Group Inc. | 0.00% | Add +6.3% | 68,626 | $62K |
| Ethos Financial Group, LLC | 0.00% | No change | 24,424 | $49K |
| Bank of New York Mellon Corp | 0.00% | Add +2.0% | 51,420 | $46K |
| Citadel Advisors | 0.00% | New | 48,225 | $43K |
| RMR Wealth Builders | 0.00% | No change | 38,360 | $35K |
| Morgan Stanley | 0.00% | Reduce -36.1% | 36,659 | $33K |
| Concurrent Investment Advisors, LLC | 0.00% | No change | 35,283 | $32K |
| Susquehanna International Group, LLP | 0.00% | Add +172.0% | 35,203 | $32K |
| Nuveen, LLC | 0.00% | — | 34,540 | $31K |
| AQR Capital Management | 0.00% | New | 32,227 | $29K |
| ERn Financial, LLC | 0.00% | No change | 31,819 | $29K |
| Barclays PLC | 0.00% | Reduce -31.4% | 29,712 | $27K |
| Rhumbline Advisers | 0.00% | Add +8.3% | 23,356 | $21K |
| NewEdge Advisors, LLC | 0.00% | Reduce -11.6% | 22,906 | $21K |
| Intech Investment Management LLC | 0.00% | Add +73.9% | 22,002 | $20K |
| Saxon Interests, Inc. | 0.01% | No change | 21,214 | $19K |
| SG Americas Securities, LLC | 0.00% | New | 20,524 | $18K |
| Citigroup Inc. | 0.00% | Reduce -11.0% | 19,480 | $18K |
| JPMorgan Chase & Co. | 0.00% | Add +49.1% | 19,367 | $17K |
| Raymond James Financial Inc. | 0.00% | No change | 18,642 | $17K |
| XTX Topco Ltd | 0.00% | New | 17,669 | $16K |
| Cetera Investment Advisers | 0.00% | Add +30.8% | 17,135 | $15K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.4% | 16,627 | $15K |
| Flaharty Asset Management, LLC | 0.00% | No change | 14,702 | $13K |
| Cahaba Wealth Management, Inc. | 0.00% | No change | 14,702 | $13K |
| Corebridge Financial, Inc. | 0.00% | Reduce -1.5% | 13,396 | $12K |
| Wells Fargo & Company | 0.00% | Add +2.2% | 13,266 | $12K |
| Invesco Ltd. | 0.00% | No change | 12,659 | $11K |
| Two Sigma Investments, LP | 0.00% | Add +22.4% | 12,318 | $11K |
| Brooklyn Investment Group | 0.00% | No change | 11,500 | $10K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +107.3% | 9,584 | $9K |
| Hantz Financial Services, Inc. | 0.00% | New | 8,000 | $7K |
| FMR LLC | 0.00% | Add +3.9% | 6,478 | $6K |
| Osaic Holdings, Inc. | 0.00% | Reduce -84.2% | 5,500 | $5K |
| STRS Ohio | 0.00% | No change | 4,700 | $4K |
| Federated Hermes, Inc. | 0.00% | Add +576.0% | 4,103 | $4K |
| Cwm, LLC | 0.00% | Add +2528.5% | 3,233 | $3K |
| New York State Common Retirement Fund | 0.00% | No change | 2,900 | $3K |
| Legal & General Group Plc | 0.00% | No change | 2,816 | $3K |
| Deutsche Bank AG | 0.00% | Add +71.5% | 2,602 | $2K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 2,493 | $2K |
| BNP Paribas Financial Markets | 0.00% | Reduce -35.2% | 2,394 | $2K |
| California State Teachers Retirement System | 0.00% | No change | 2,153 | $2K |
| Grove Bank & Trust | 0.00% | Add +100.0% | 2,000 | $2K |
| Amalgamated Bank | 0.00% | No change | 880 | $1K |
| Royal Bank of Canada | 0.00% | Reduce -70.8% | 1,161 | $1K |
| Allworth Financial LP | 0.00% | No change | 261 | $337 |
| Nisa Investment Advisors, LLC | 0.00% | Add +390.0% | 196 | $176 |
| EverSource Wealth Advisors, LLC | 0.00% | New | 154 | $139 |
| True Wealth Design, LLC | 0.00% | New | 141 | $127 |
| Sterling Capital Management LLC | 0.00% | No change | 26 | $23 |
"% of holder's portfolio" is FBLG's weight in each manager's 13F, not the share of Fibrobiologics Inc. the manager owns.