Security key
31573L105
FibroBiologics, Inc. - Common Stock, $0.00001 par value (FBLG)
CUSIP: 31573L105
Q1 2025 13F Holders as of 31 Mar 2025
- Security type / class
- Equity / Common Stock, $0.00001 par value
- Total 13F shares
- 6,398,618
- Total 13F value
- $5,758,906
- Share change
- +502,343
- SEC-reported price per share
- $0.90
- Number of holders
- 63
- Value change
- +$306,126
- Number of buys
- 30
- Number of sells
- 17
- Shares outstanding
- 4,613,908
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2025
Institutions
63
Top holders
10
FBLG full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
FibroBiologics, Inc. SEC filings
FibroBiologics, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 31573L105
Recent filing periods:
Ownership snapshot
Top reported holders of FBLG - FibroBiologics, Inc. - Common Stock, $0.00001 par value (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 2024
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.
39%
VANGUARD GROUP INC
20%
GEODE CAPITAL MANAGEMENT, LLC
13%
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
|
18%
|
$7,229,517
6,951,459 shares
|
$0 | 31 Jan 2024 |
| Michael F. Newlin |
13D/G
Mike Newlin
|
5.6%
|
$1,857,322
2,134,853 shares
|
$0 | 09 Aug 2024 |
| BlackRock, Inc. |
13F
Company
|
39%
|
$3,572,390
1,786,195 shares
|
— | 31 Dec 2024 |
| VANGUARD GROUP INC |
13F
Company
|
20%
|
$1,823,466
911,733 shares
|
— | 31 Dec 2024 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
13%
|
$1,210,214
604,927 shares
|
— | 31 Dec 2024 |
| STATE STREET CORP |
13F
Company
|
12%
|
$1,149,044
574,522 shares
|
— | 31 Dec 2024 |
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 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
63
Shares
6,398,618
Rows available
63
| 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 2025 vs Q4 2025 Across Filers
Q4 2025 holders
44
Q1 2025 holders
63
Holder diff
19
| Investor | Q4 2025 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend