FibrobiologicsFBLG

13F holders, Q1 2026 (March 31)
17holders +16
14new positions
0sold out
1famous investor
$1.32avg. 13F price*

At the end of Q1 2026, 17 institutions reported holding Fibrobiologics Inc. (FBLG) in their 13F filings, up 16 from Q2 2025. 14 opened new positions and 0 sold out. The largest holders were Vanguard Capital Management LLC ($89K), Fund Evaluation Group, LLC ($68K) and Geode Capital Management, LLC ($39K). One famous investor held it Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).

Company
Fibrobiologics Inc.
CUSIP
31573L204
Latest filing quarter
Q2 2026

History

Number of 13F holders

05101520 Q2 2025: 1Q2 2025Q1 2026: 17Q1 2026Q2 2026: 16Q2 2026

Total Exit/New Position Q2 2025 → Q1 2026

InstitutionsTotal Value
New Positions14$193K
Exits0$0

All 13F filers, Q2 2025 → Q1 2026: 146,099 shares bought, net +146,099 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.

Ownership 17 holders
Vanguard Capital Management LLC 0.00% — 67,665 $89K
Fund Evaluation Group, LLC 0.00% New 51,794 $68K
Geode Capital Management, LLC 0.00% New 29,609 $39K
BlackRock, Inc. 0.00% New 24,647 $33K
Cascade Financial Partners, LLC 0.00% New 16,428 $22K
Renaissance Technologies 0.00% New 15,997 $21K
Vanguard Fiduciary Trust Co. 0.00% — 6,380 $8K
UBS Group AG 0.00% New 5,721 $8K
NewEdge Advisors, LLC 0.00% New 845 $1K
Vanguard Global Advisers, LLC 0.00% — 536 $708
Tower Research Capital LLC (TRC) 0.00% New 460 $607
Islay Capital Management, LLC 0.00% New 169 $223
Osaic Holdings, Inc. 0.00% New 154 $203
BNP Paribas Financial Markets 0.00% New 66 $87
Allworth Financial LP 0.00% New 13 $18
Wells Fargo & Company 0.00% New 10 $13
Royal Bank of Canada 0.00% New 186 $0

"% of holder's portfolio" is FBLG's weight in each manager's 13F, not the share of Fibrobiologics Inc. the manager owns.