Mustang Bio
MBIO
22 hedge funds and large institutions have $370K invested in Mustang Bio in 2026 Q1 according to their latest regulatory filings, with 4 funds opening new positions, 5 increasing their positions, 4 reducing their positions, and 6 closing their positions.
25% more repeat investments, than reductions
Existing positions increased: 5 | Existing positions reduced: 4
1.01% less ownership
Funds ownership: 8.55% → 7.55% (-1%)
12% less funds holding
Funds holding: 25 → 22 (-3)
32% less capital invested
Capital invested by funds: $542K → $370K (-$172K)
33% less first-time investments, than exits
New positions opened: 4 | Existing positions closed: 6
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
KAS
Kestra Advisory Services
Austin,
Texas
|
+$61.2K |
| 2 |
Geode Capital Management
Boston,
Massachusetts
|
+$56.9K |
| 3 |
CG
CFO4Life Group
Coppell,
Texas
|
+$7.06K |
| 4 |
UBS Group
Zurich,
Switzerland
|
+$3.4K |
| 5 |
TRCT
Tower Research Capital (TRC)
New York
|
+$903 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DS
DRW Securities
Chicago,
Illinois
|
-$72.5K |
| 2 |
Citadel Advisors
Miami,
Florida
|
-$29.7K |
| 3 |
XT
XTX Topco
George Town,
Cayman Islands
|
-$23.6K |
| 4 |
Two Sigma Investments
New York
|
-$21.9K |
| 5 |
Jane Street
New York
|
-$13.9K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
GCP
26
GSA Capital Partners
London,
United Kingdom
| – | -$13K | -12,834 | Closed |
|
|
HI
27
Harbour Investments
Madison,
Wisconsin
| – | -$75 | -76 | Closed |
|
28
Bank of America
Charlotte,
North Carolina
| – | -$53 | -54 | Closed |
|
MBIO Hedge Fund Activity: Q1 2026 in Review
22 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Mustang Bio (MBIO) for Q1 2026, worth a combined $370K — down 32% from $542K a quarter earlier.
Sellers outnumbered buyers: 6 funds closed out of MBIO and 4 opened new positions — a net loss of 2 holders — while 4 trimmed existing stakes and 5 added.
The largest buyer was Kestra Advisory Services, adding an estimated $61.2K. The largest seller was DRW Securities, exiting entirely with an estimated $72.5K sold.
- 22 institutional investors held Mustang Bio (MBIO) as of Q1 2026, down from 25 in Q4 2025.
- Funds reported $370K of Mustang Bio stock for Q1 2026, down 32% quarter-over-quarter.
- 4 funds opened new Mustang Bio positions in Q1 2026 and 6 closed out, a net change of -2 holders.
- The largest Mustang Bio buyer in Q1 2026 was Kestra Advisory Services, an estimated $61.2K added.
- The largest Mustang Bio seller in Q1 2026 was DRW Securities, an estimated $72.5K sold.
Based on aggregated 13F filings for Q1 2026.