What does CUSIP 31573L204 represent in this 13F holders report?

CUSIP 31573L204 is the security identifier for FBLG - FibroBiologics, Inc. - COM NEW used to aggregate holder disclosures.

How many institutions held FBLG - FibroBiologics, Inc. - COM NEW in Q1 2026?

16 institutional investors reported FBLG - FibroBiologics, Inc. - COM NEW for Q1 2026. Use the holders table for investor-level position and value details.

FibroBiologics, Inc. - COM NEW (FBLG)

CUSIP: 31573L204

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / COM NEW
Total 13F shares: 220,494
Total 13F value: $291,062
Share change: +145,847
SEC-reported price per share: $1.32
Number of holders: 16
Value change: +$192,527
Number of buys: 12

Security key

31573L204

Report period

Q1 2026

Institutions

Top holders

FBLG full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 FibroBiologics, Inc. SEC filings FibroBiologics, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 31573L204

Newer quarter: Q2 2026

Recent filing periods:

Q2 2026 Q1 2026

Ownership snapshot

Top reported holders of FBLG - FibroBiologics, Inc. - COM NEW (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Pete O'Heeron

Disclosed value leader

Pete O'Heeron

Comparable rows

15/15

Latest evidence

31 Dec 2025

13D/G 13F Lead comparable stake: 18% 13D/G row: Pete O'Heeron Showing 1-6 of 15 holder rows.

Quick read

Pete O'Heeron leads the comparable SEC ownership view at 18%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Pete O'Heeron's linked filing trail.

Comparable ownership Top 5

Pete O'Heeron 18%

Michael F. Newlin 5.6%

BlackRock, Inc. 2%

VANGUARD GROUP INC 26%

GEODE CAPITAL MANAGEMENT, LLC 7.6%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Pete O'Heeron	13D/G 13D/G	18%	$7,229,517 6,951,459 shares	$0	31 Jan 2024
Michael F. Newlin	13D/G Mike Newlin 13D/G	5.6%	$1,857,322 2,134,853 shares	$0	09 Aug 2024
BlackRock, Inc.	13D/G 13F Company 13D/G 13F	2%	$467,209 750,898 shares	-$644,162	30 Jun 2025
VANGUARD GROUP INC	13F Company 13F	26%	$273,677 1,216,341 shares	—	31 Dec 2025
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	7.6%	$78,470 348,761 shares	—	31 Dec 2025
Cascade Financial Partners, LLC	13F Company 13F	6.8%	$70,749 314,581 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

220,494

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend