FibroBiologics, Inc.
FBLG- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001958777
No open-market purchases or sales by FibroBiologics, Inc. insiders were filed in the last 90 days; 16 institutions reported holding it in 13F filings for Q2 2026, worth $269.6K in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in FibroBiologics, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 17
- −28 vs. Q4 2025
- Shares held
- 220.7K
- +60.6K (+37.9%) vs. Q4 2025Converted for a 1-for-20 split
- Total value
- $291.1K
- −$429.0K (−59.6%) vs. Q4 2025
- New holders
- 4
- 6 more added
- Sold out
- 32
- 3 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting FBLG on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 16 | $269.6K |
| Q1 2026 | 17 | $291.1K |
| Q4 2025 | 46 | $993.8K |
| Q3 2025 | 55 | $2.93M |
| Q2 2025 | 59 | $3.75M |
| Q1 2025 | 65 | $5.81M |
| Q4 2024 | 64 | $11.9M |
| Q3 2024 | 61 | $16.8M |
| Q2 2024 | 50 | $17.2M |
| Q1 2024 | 17 | $5.18M |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding FibroBiologics, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 67,665 | $89.3K | 0.00% | +67,665 | New |
| Fund Evaluation Group, LLC | 51,794 | $68.4K | 0.00% | +51,794 | New |
| Geode Capital Management, LLC | 29,609 | $39.1K | 0.00% | +12,171+69.8% | AddedConverted for a 1-for-20 split |
| BlackRock, Inc. | 24,647 | $32.5K | 0.00% | +527+2.2% | AddedConverted for a 1-for-20 split |
| Cascade Financial Partners, LLC | 16,428 | $21.7K | 0.00% | +699+4.4% | AddedConverted for a 1-for-20 split |
| Renaissance Technologies LLC | 15,997 | $21.1K | 0.00% | +4,417+38.1% | AddedConverted for a 1-for-20 split |
| Vanguard Fiduciary Trust Co | 6,380 | $8.42K | 0.00% | +6,380 | New |
| UBS Group AG | 5,721 | $7.55K | 0.00% | −318−5.3% | ReducedConverted for a 1-for-20 split |
| GWM Advisors LLC | 845 | $1.11K | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Vanguard Global Advisers, LLC | 536 | $708 | 0.00% | +536 | New |
| Tower Research Capital LLC (TRC) | 460 | $607 | 0.00% | −445−49.2% | ReducedConverted for a 1-for-20 split |
| Islay Capital Management, LLC | 169 | $223 | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Advisor Group Holdings, Inc. | 154 | $203 | 0.00% | −146−48.7% | ReducedConverted for a 1-for-20 split |
| BNP Paribas Arbitrage, SA | 66 | $87 | 0.00% | +1+1.1% | AddedConverted for a 1-for-20 split |
| Allworth Financial LP | 13 | $18 | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Wells Fargo & Company | 10 | $13 | 0.00% | 00.0% | UnchangedConverted for a 1-for-20 split |
| Royal Bank of Canada | 186 | $0 | 0.00% | +94+102.0% | AddedConverted for a 1-for-20 split |
| Millennium Management LLC | 0 | $0 | 0.00% | −14,425−100.0% | Sold outConverted for a 1-for-20 split |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −7,488−100.0% | Sold outConverted for a 1-for-20 split |
| AMG National Trust Bank | 0 | $0 | 0.00% | −6,948−100.0% | Sold outConverted for a 1-for-20 split |
| State Street Corp | 0 | $0 | 0.00% | −5,565−100.0% | Sold outConverted for a 1-for-20 split |
| Optivise Advisory Services LLC | 0 | $0 | 0.00% | −5,505−100.0% | Sold outConverted for a 1-for-20 split |
| Requisite Capital Management, LLC | 0 | $0 | 0.00% | −5,486−100.0% | Sold outConverted for a 1-for-20 split |
| Wiley Bros.-Aintree Capital, LLC | 0 | $0 | 0.00% | −5,000−100.0% | Sold outConverted for a 1-for-20 split |
| Cerity Partners LLC | 0 | $0 | 0.00% | −4,696−100.0% | Sold outConverted for a 1-for-20 split |
| American Institute for Advanced Investment Management, LLP | 0 | $0 | 0.00% | −4,410−100.0% | Sold outConverted for a 1-for-20 split |
| Saxon Interests, Inc. | 0 | $0 | 0.00% | −2,850−100.0% | Sold outConverted for a 1-for-20 split |
| Bank of America Corp | 0 | $0 | 0.00% | −2,409−100.0% | Sold outConverted for a 1-for-20 split |
| Northern Trust Corp | 0 | $0 | 0.00% | −2,384−100.0% | Sold outConverted for a 1-for-20 split |
| RMR Wealth Builders | 0 | $0 | 0.00% | −1,918−100.0% | Sold outConverted for a 1-for-20 split |
| XTX Topco Ltd | 0 | $0 | 0.00% | −1,896−100.0% | Sold outConverted for a 1-for-20 split |
| Concurrent Investment Advisors, LLC | 0 | $0 | 0.00% | −1,764−100.0% | Sold outConverted for a 1-for-20 split |
| DRW Securities, LLC | 0 | $0 | 0.00% | −1,667−100.0% | Sold outConverted for a 1-for-20 split |
| Ethos Financial Group, LLC | 0 | $0 | 0.00% | −1,221−100.0% | Sold outConverted for a 1-for-20 split |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −932−100.0% | Sold outConverted for a 1-for-20 split |
| Cetera Investment Advisers | 0 | $0 | 0.00% | −900−100.0% | Sold outConverted for a 1-for-20 split |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −842−100.0% | Sold outConverted for a 1-for-20 split |
| Flaharty Asset Management, LLC | 0 | $0 | 0.00% | −735−100.0% | Sold outConverted for a 1-for-20 split |
| Cahaba Wealth Management, Inc. | 0 | $0 | 0.00% | −735−100.0% | Sold outConverted for a 1-for-20 split |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −724−100.0% | Sold outConverted for a 1-for-20 split |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −575−100.0% | Sold outConverted for a 1-for-20 split |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −523−100.0% | Sold outConverted for a 1-for-20 split |
| Global Assets Advisory, LLC | 0 | $0 | 0.00% | −523−100.0% | Sold outConverted for a 1-for-20 split |
| CWA Asset Management Group, LLC | 0 | $0 | 0.00% | −500−100.0% | Sold outConverted for a 1-for-20 split |
| Grove Bank & Trust | 0 | $0 | 0.00% | −100−100.0% | Sold outConverted for a 1-for-20 split |
| Disciplined Equity Management, Inc. | 0 | $0 | 0.00% | −50−100.0% | Sold outConverted for a 1-for-20 split |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −1−100.0% | Sold outConverted for a 1-for-20 split |
| Deutsche Bank AG | 0 | $0 | 0.00% | −1−100.0% | Sold outConverted for a 1-for-20 split |
| Barclays PLC | 0 | $0 | 0.00% | −0−100.0% | Sold outConverted for a 1-for-20 split |
| Vanguard Group Inc | – | – | – | – | Not filed |