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FibroBiologics
FBLG

45 hedge funds and large institutions have $994K invested in FibroBiologics in 2025 Q4 according to their latest regulatory filings, with 6 funds opening new positions, 7 increasing their positions, 7 reducing their positions, and 13 closing their positions.

New
Increased
Maintained
Reduced
Closed

0% more repeat investments, than reductions

Existing positions increased: 7 | Existing positions reduced: 7

0.31% less ownership

Funds ownership: 0.64% → 0.33% (-0.31%)

13% less funds holding

Funds holding: 52 → 45 (-7)

54% less first-time investments, than exits

New positions opened: 6 | Existing positions closed: 13

70% less capital invested

Capital invested by funds: $3.28M → $994K (-$2.29M)

Holders
45
Holders Change
-7
Holders Change %
-13.46%
% of All Funds
0.55%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
6
Increased
7
Reduced
7
Closed
13
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Renaissance Technologies
Renaissance Technologies
New York
+$60.5K
2
Jane Street
Jane Street
New York
+$52.7K
3
ANTB
AMG National Trust Bank
Colorado
+$48.9K
4
Geode Capital Management
Geode Capital Management
Massachusetts
+$21.1K
5
UBS Group
UBS Group
Switzerland
+$15.3K

Top Sellers

Rank Fund Capital Flow
1
LM
Luminus Management
Texas
-$346K
2
YAG
Yorkville Advisors Global
New Jersey
-$278K
3
LCM
Landscape Capital Management
New Jersey
-$191K
4
GS
GTS Securities
New York
-$169K
5
Citadel Advisors
Citadel Advisors
Florida
-$115K
Name Holding Trade Value Shares
Change 		Change in
Stake
Vanguard Group
1
Vanguard Group
Pennsylvania
$274K -$6.14K -872 -1%
BlackRock
2
BlackRock
New York
$108K +$15K +2,131 +10%
Geode Capital Management
3
Geode Capital Management
Massachusetts
$78.5K +$21.1K +2,991 +21%
CFP
4
Cascade Financial Partners
California
$70.7K +$5.81K +825 +6%
Millennium Management
5
Millennium Management
New York
$64.9K -$55.5K -7,885 -35%
Renaissance Technologies
6
Renaissance Technologies
New York
$52.1K +$60.5K +8,590 +287%
Jane Street
7
Jane Street
New York
$33.7K +$52.7K +7,488 New
ANTB
8
AMG National Trust Bank
Colorado
$31.3K +$48.9K +6,948 New
UBS Group
9
UBS Group
Switzerland
$27.2K +$15.3K +2,167 +56%
State Street
10
State Street
Massachusetts
$25K – – –
OAS
11
Optivise Advisory Services
Tennessee
$24.8K – – –
RCM
12
Requisite Capital Management
Texas
$24.7K – – –
P
13
&Partners
Tennessee
$22.5K – – –
Cerity Partners
14
Cerity Partners
New York
$21.1K -$11.3K -1,600 -25%
AIFAIM
15
American Institute for Advanced Investment Management
Arizona
$19.8K – – –
SI
16
Saxon Interests
Texas
$12.8K +$5.56K +789 +38%
Bank of America
17
Bank of America
North Carolina
$10.8K – – –
Northern Trust
18
Northern Trust
Illinois
$10.7K – – –
RWB
19
RMR Wealth Builders
New Jersey
$8.63K – – –
XT
20
XTX Topco
Cayman Islands
$8.53K +$13.4K +1,896 New
CIA
21
Concurrent Investment Advisors
Florida
$7.93K – – –
DS
22
DRW Securities
Illinois
$7.5K +$11.7K +1,667 New
EFG
23
Ethos Financial Group
Pennsylvania
$5.49K – – –
Raymond James Financial
24
Raymond James Financial
Florida
$4.19K – – –
TRCT
25
Tower Research Capital (TRC)
New York
$4.07K +$402 +57 +7%
1
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FBLG Hedge Fund Activity: Q4 2025 in Review

45 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in FibroBiologics (FBLG) for Q4 2025, worth a combined $994K — down 70% from $3.28M a quarter earlier.

Sellers outnumbered buyers: 13 funds closed out of FBLG and 6 opened new positions — a net loss of 7 holders — while 7 trimmed existing stakes and 7 added.

The largest buyer was Renaissance Technologies, adding an estimated $60.5K. The largest seller was Luminus Management, exiting entirely with an estimated $346K sold.

  • 45 institutional investors held FibroBiologics (FBLG) as of Q4 2025, down from 52 in Q3 2025.
  • Funds reported $994K of FibroBiologics stock for Q4 2025, down 70% quarter-over-quarter.
  • 6 funds opened new FibroBiologics positions in Q4 2025 and 13 closed out, a net change of -7 holders.
  • The largest FibroBiologics buyer in Q4 2025 was Renaissance Technologies, an estimated $60.5K added.
  • The largest FibroBiologics seller in Q4 2025 was Luminus Management, an estimated $346K sold.

Based on aggregated 13F filings for Q4 2025.