Generation Bio
GBIO
GBIO was delisted on the 6th of February, 2026.
68 hedge funds and large institutions have $906M invested in Generation Bio in 2020 Q4 according to their latest regulatory filings, with 21 funds opening new positions, 26 increasing their positions, 10 reducing their positions, and 6 closing their positions.
250% more first-time investments, than exits
New positions opened: 21 | Existing positions closed: 6
160% more repeat investments, than reductions
Existing positions increased: 26 | Existing positions reduced: 10
100% more funds holding in top 10
Funds holding in top 10: 2 → 4 (+2)
28% more funds holding
Funds holding: 53 → 68 (+15)
5.36% more ownership
Funds ownership: 63.37% → 68.73% (+5.4%)
1% more capital invested
Capital invested by funds: $896M → $906M (+$10.1M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$21.4M |
| 2 |
BG
Bellevue Group
Kuesnacht,
Switzerland
|
+$14.5M |
| 3 |
State Street
Boston,
Massachusetts
|
+$12.5M |
| 4 |
JP Morgan Chase
New York
|
+$8.1M |
| 5 |
Goldman Sachs
New York
|
+$5.09M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$6.18M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$5.87M |
| 3 |
Victory Capital Management
San Antonio,
Texas
|
-$4.74M |
| 4 |
Janus Henderson Group
London,
|
-$1.17M |
| 5 |
CCM
CAAS Capital Management
New York
|
-$1.08M |
GBIO Hedge Fund Activity: Q4 2020 in Review
68 of the 5,677 institutional investors tracked by Wall St. Rank reported a position in Generation Bio (GBIO) for Q4 2020, worth a combined $906M — up 1.1% from $896M a quarter earlier.
Buyers outnumbered sellers: 21 funds opened new GBIO positions and 6 closed out — a net gain of 15 holders — while 26 added to existing stakes and 10 trimmed.
The largest buyer was BlackRock, adding an estimated $21.4M. The largest seller was Fidelity Investments, cutting an estimated $6.18M.
- 68 institutional investors held Generation Bio (GBIO) as of Q4 2020, up from 53 in Q3 2020.
- Funds reported $906M of Generation Bio stock for Q4 2020, up 1.1% quarter-over-quarter.
- 21 funds opened new Generation Bio positions in Q4 2020 and 6 closed out, a net change of +15 holders.
- The largest Generation Bio buyer in Q4 2020 was BlackRock, an estimated $21.4M added.
- The largest Generation Bio seller in Q4 2020 was Fidelity Investments, an estimated $6.18M sold.
Based on aggregated 13F filings for Q4 2020.