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Delisting risk

FBLG · NASDAQ · Biotechnology

FibroBiologics (FBLG)

Develops allogeneic fibroblast therapies for diabetic foot ulcers and other chronic diseases.

$1.88

Pre-market−0.06 (−3.09%)

At close$1.94(−8.06%)

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Breakdown13F · 13D/G · Form 4

Institutions17 holders · as of Mar 31, 2026	3.31%	220.7K shares
Insiders4 holders · as of Mar 5, 2026	4.71%	313.5K shares
Strategic holders1 holder · as of Aug 14, 2026	11.10%	739.0K shares
Otherremainder	80.88%	5.39M shares

6.66M company shares as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing

Two share counts disagree (6.66M in the company's Sep 3, 2026 report, 2.10M elsewhere); stakes use the report.

A stock split fell inside the quarter, so quarter-on-quarter changes are not shown.

Top shareholders13F · 13D/G · Form 4

Holder	Stake	Shares	Evidence
Armistice Capital, LLCStrategic	11.10%	738,977	13Gfiled Aug 14, 2026 ↗
Pete O'HeeronInsiderdirector, officer: CHIEF EXECUTIVE OFFICER	4.47%	297,907	Form 4filed Mar 4, 2026 ↗
Vanguard Capital Management LLCInstitution	1.02%	67,665	13Fas of Mar 31, 2026
Fund Evaluation Group, LLCInstitution	0.78%	51,794	13Fas of Mar 31, 2026
Geode Capital Management, LLCInstitution	0.44%	29,609	13Fas of Mar 31, 2026
BlackRock, Inc.Institution	0.37%	24,647	13Fas of Mar 31, 2026
Cascade Financial Partners, LLCInstitution	0.25%	16,428	13Fas of Mar 31, 2026
Renaissance Technologies LLCInstitution	0.24%	15,997	13Fas of Mar 31, 2026
Ruben A. GarciaInsiderofficer: General Counsel	0.14%	9,000	Form 4filed Mar 2, 2026 ↗
Vanguard Fiduciary Trust CoInstitution	0.10%	6,380	13Fas of Mar 31, 2026
UBS Group AGInstitution	0.09%	5,721	13Fas of Mar 31, 2026
Jason DavisInsiderofficer: Chief Financial Officer	0.05%	3,500	Form 4filed Mar 3, 2026 ↗
Hamid KhojaInsiderofficer: Chief Scientific Officer	0.05%	3,063	Form 4filed Mar 5, 2026 ↗
Newedge Advisors, LLCInstitution	0.01%	845	13Fas of Mar 31, 2026
Vanguard Global Advisers, LLCInstitution	0.01%	536	13Fas of Mar 31, 2026
Tower Research Capital LLC (TRC)Institution	0.01%	460	13Fas of Mar 31, 2026
Western Wealth Management, LLCInstitution	0.00%	200	13Fas of Mar 31, 2026
Islay Capital Management, LLCInstitution	0.00%	169	13Fas of Mar 31, 2026
Advisor Group Holdings, Inc.Institution	0.00%	154	13Fas of Mar 31, 2026
BNP Paribas Arbitrage, SNCInstitution	0.00%	66	13Fas of Mar 31, 2026
Allworth Financial LPInstitution	0.00%	13	13Fas of Mar 31, 2026
Wells Fargo & Company/MNInstitution	0.00%	10	13Fas of Mar 31, 2026
Mike NewlinInsider	—5.58% of class, as filed	—	13Gfiled Jun 6, 2025 ↗

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more · Form 4 — an insider's transaction report

Institutions13F, as of Mar 31, 2026

17 holders · 220.7K shares

Holder	Shares	% outstanding	Filed
Vanguard Capital Management LLC	67.7K	1.02%	May 15, 2026
Fund Evaluation Group, LLC	51.8K	0.78%	May 8, 2026
Geode Capital Management, LLC	29.6K	0.44%	May 15, 2026
BlackRock, Inc.	24.6K	0.37%	May 13, 2026
Cascade Financial Partners, LLC	16.4K	0.25%	May 12, 2026
Renaissance Technologies LLC	16.0K	0.24%	May 14, 2026
Vanguard Fiduciary Trust Co	6.4K	0.10%	May 8, 2026
UBS Group AG	5.7K	0.09%	May 5, 2026

Ownership statements13D/G · 5% or more, as filed

Holder	% of class	Shares	Form	Filed
Pete O'Heeron	18.20%		13G	Feb 12, 2025 ↗
Armistice Capital, LLC	9.99%	739.0K	13G	Aug 14, 2026 ↗
Mike Newlin	5.58%		13G	Jun 6, 2025 ↗

Insider tradesForm 4

Latest trades

Date	Insider	Type	Shares	Avg price	Owned after
Mar 4, 2026	Hamid Khojaofficer: Chief Scientific Officer	Purchase	30,000	$0.3800	61,250
Mar 2, 2026	Pete O'Heerondirector, officer: CHIEF EXECUTIVE OFFICER	Purchase	17,428	$0.3530	5,924,075
Mar 3, 2026	Pete O'Heerondirector, officer: CHIEF EXECUTIVE OFFICER	Purchase	18,200	$0.4051	5,942,275
Mar 4, 2026	Pete O'Heerondirector, officer: CHIEF EXECUTIVE OFFICER	Purchase	15,872	$0.3784	5,958,147
Mar 2, 2026	Jason Davisofficer: Chief Financial Officer	Purchase	70,000	$0.4139	70,000
Feb 27, 2026	Ruben A. Garciaofficer: General Counsel	Purchase	40,000	$0.3264	180,000
Dec 11, 2025	Ruben A. Garciaofficer: General Counsel	Purchase	140,000	$0.3400	140,000

CongressHouse and Senate disclosures

Not reported.