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Mustang Bio
MBIO

20 hedge funds and large institutions have $427K invested in Mustang Bio in 2025 Q3 according to their latest regulatory filings, with 6 funds opening new positions, 5 increasing their positions, 3 reducing their positions, and 3 closing their positions.

New
Increased
Maintained
Reduced
Closed

501% more capital invested

Capital invested by funds: $70.9K → $427K (+$356K)

100% more first-time investments, than exits

New positions opened: 6 | Existing positions closed: 3

67% more repeat investments, than reductions

Existing positions increased: 5 | Existing positions reduced: 3

18% more funds holding

Funds holding: 17 → 20 (+3)

2.29% more ownership

Funds ownership: 2.1% → 4.39% (+2.3%)

Holders
20
Holders Change
+3
Holders Change %
+17.65%
% of All Funds
0.26%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
6
Increased
5
Reduced
3
Closed
3
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$148K
2
KAS
Kestra Advisory Services
Texas
+$118K
3
Vanguard Group
Vanguard Group
Pennsylvania
+$103K
4
XT
XTX Topco
Cayman Islands
+$33.4K
5
Renaissance Technologies
Renaissance Technologies
New York
+$21K

Top Sellers

Rank Fund Capital Flow
1
UBS Group
UBS Group
Switzerland
-$40.1K
2
Citadel Advisors
Citadel Advisors
Florida
-$26.8K
3
TRCT
Tower Research Capital (TRC)
New York
-$4.7K
4
Citigroup
Citigroup
New York
-$718
5
Raymond James Financial
Raymond James Financial
Florida
-$16
Name Holding Trade Value Shares
Change 		Change in
Stake
BlackRock
1
BlackRock
New York
$129K +$148K +83,080 +4,990%
KAS
2
Kestra Advisory Services
Texas
$100K +$118K +66,108 New
Vanguard Group
3
Vanguard Group
Pennsylvania
$88K +$103K +57,863 New
Geode Capital Management
4
Geode Capital Management
Massachusetts
$40.2K +$18.4K +10,336 +64%
XT
5
XTX Topco
Cayman Islands
$28.5K +$33.4K +18,775 New
Renaissance Technologies
6
Renaissance Technologies
New York
$17.9K +$21K +11,800 New
CG
7
CFO4Life Group
Texas
$15.9K +$18.6K +10,461 New
SS
8
SBI Securities
Japan
$3.05K +$2.67K +1,505 +300%
TRCT
9
Tower Research Capital (TRC)
New York
$2.02K -$4.7K -2,646 -67%
Citigroup
10
Citigroup
New York
$915 -$718 -404 -40%
Morgan Stanley
11
Morgan Stanley
New York
$461 +$117 +66 +28%
HI
12
Harbour Investments
Wisconsin
$116 – – –
Bank of America
13
Bank of America
North Carolina
$79 +$34 +19 +58%
UBS Group
14
UBS Group
Switzerland
$73 -$40.1K -22,537 -100%
BNP Paribas Financial Markets
15
BNP Paribas Financial Markets
France
$9 – – –
NS
16
NBC Securities
Alabama
$4 +$5 +3 New
DB
17
Danske Bank
Denmark
$3 – – –
JP Morgan Chase
18
JP Morgan Chase
New York
$3 – – –
Group One Trading
19
Group One Trading
Illinois
$2 – – –
Citadel Advisors
20
Citadel Advisors
Florida
– -$26.8K -28,069 Closed
Raymond James Financial
21
Raymond James Financial
Florida
– -$16 -16 Closed
AWM
22
Activest Wealth Management
Florida
– -$4 -2 Closed

MBIO Hedge Fund Activity: Q3 2025 in Review

20 of the 7,629 institutional investors tracked by Wall St. Rank reported a position in Mustang Bio (MBIO) for Q3 2025, worth a combined $427K — up 501% from $70.9K a quarter earlier.

Buyers outnumbered sellers: 6 funds opened new MBIO positions and 3 closed out — a net gain of 3 holders — while 5 added to existing stakes and 3 trimmed.

The largest buyer was BlackRock, adding an estimated $148K. The largest seller was UBS Group, cutting an estimated $40.1K.

  • 20 institutional investors held Mustang Bio (MBIO) as of Q3 2025, up from 17 in Q2 2025.
  • Funds reported $427K of Mustang Bio stock for Q3 2025, up 501% quarter-over-quarter.
  • 6 funds opened new Mustang Bio positions in Q3 2025 and 3 closed out, a net change of +3 holders.
  • The largest Mustang Bio buyer in Q3 2025 was BlackRock, an estimated $148K added.
  • The largest Mustang Bio seller in Q3 2025 was UBS Group, an estimated $40.1K sold.

Based on aggregated 13F filings for Q3 2025.