Generation Bio
GBIO
GBIO was delisted on the 6th of February, 2026.
41 hedge funds and large institutions have $24.2M invested in Generation Bio in 2025 Q3 according to their latest regulatory filings, with 7 funds opening new positions, 12 increasing their positions, 20 reducing their positions, and 27 closing their positions.
82% more capital invested
Capital invested by funds: $13.3M → $24.2M (+$10.9M)
52.74% more ownership
Funds ownership: 6.19% → 58.93% (+53%)
33% less funds holding
Funds holding: 61 → 41 (-20)
40% less repeat investments, than reductions
Existing positions increased: 12 | Existing positions reduced: 20
74% less first-time investments, than exits
New positions opened: 7 | Existing positions closed: 27
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Marshall Wace
London,
United Kingdom
|
+$1.07M |
| 2 |
CF
Cantor Fitzgerald
New York
|
+$513K |
| 3 |
Renaissance Technologies
New York
|
+$446K |
| 4 |
Morgan Stanley
New York
|
+$378K |
| 5 |
UBS Group
Zurich,
Switzerland
|
+$312K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$1.4M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$1.15M |
| 3 |
BlackRock
New York
|
-$290K |
| 4 |
MCP
Militia Capital Partners
Las Vegas,
Nevada
|
-$174K |
| 5 |
Squarepoint
New York
|
-$166K |
GBIO Hedge Fund Activity: Q3 2025 in Review
41 of the 7,628 institutional investors tracked by Wall St. Rank reported a position in Generation Bio (GBIO) for Q3 2025, worth a combined $24.2M — up 82% from $13.3M a quarter earlier.
Sellers outnumbered buyers: 27 funds closed out of GBIO and 7 opened new positions — a net loss of 20 holders — while 20 trimmed existing stakes and 12 added.
The largest buyer was Marshall Wace, adding an estimated $1.07M. The largest seller was T. Rowe Price Associates, cutting an estimated $1.4M.
- 41 institutional investors held Generation Bio (GBIO) as of Q3 2025, down from 61 in Q2 2025.
- Funds reported $24.2M of Generation Bio stock for Q3 2025, up 82% quarter-over-quarter.
- 7 funds opened new Generation Bio positions in Q3 2025 and 27 closed out, a net change of -20 holders.
- The largest Generation Bio buyer in Q3 2025 was Marshall Wace, an estimated $1.07M added.
- The largest Generation Bio seller in Q3 2025 was T. Rowe Price Associates, an estimated $1.4M sold.
Based on aggregated 13F filings for Q3 2025.