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GBIO

Generation Bio
GBIO

Delisted

GBIO was delisted on the 6th of February, 2026.

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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.

New
Increased
Maintained
Reduced
Closed

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)

1% more capital invested

Capital invested by funds: $896M → $906M (+$9.93M)

0.54% more ownership

Funds ownership: 6.34% → 6.87% (+0.54%)

Holders
68
Holders Change
+15
Holders Change %
+28.3%
% of All Funds
1.2%
Holding in Top 10
4
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+100%
% of All Funds
0.07%
New
21
Increased
26
Reduced
10
Closed
6
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$21.4M
2
BG
Bellevue Group
Switzerland
+$14.5M
3
State Street
State Street
Massachusetts
+$12.5M
4
JP Morgan Chase
JP Morgan Chase
New York
+$8.1M
5
Goldman Sachs
Goldman Sachs
New York
+$5.09M

Top Sellers

Rank Fund Capital Flow
1
Fidelity Investments
Fidelity Investments
Massachusetts
-$6.18M
2
Wellington Management Group
Wellington Management Group
Massachusetts
-$5.87M
3
Victory Capital Management
Victory Capital Management
Texas
-$4.74M
4
Janus Henderson Group
Janus Henderson Group
United Kingdom
-$1.17M
5
CCM
CAAS Capital Management
New York
-$1.08M
Name Holding Trade Value Shares
Change 		Change in
Stake
Fidelity Investments
1
Fidelity Investments
Massachusetts
$204M -$6.18M -19,252 -3%
T. Rowe Price Associates
2
T. Rowe Price Associates
Maryland
$125M +$2.35M +7,322 +2%
AG
3
Artal Group
Luxembourg
$79.8M – – –
BG
4
Bellevue Group
Switzerland
$66.1M +$14.5M +45,318 +24%
Wellington Management Group
5
Wellington Management Group
Massachusetts
$65.3M -$5.87M -18,281 -7%
FCM
6
Farallon Capital Management
California
$64.3M +$4.76M +14,819 +7%
CC
7
Casdin Capital
New York
$45.7M – – –
BlackRock
8
BlackRock
New York
$37.9M +$21.4M +66,565 +99%
DM
9
Deerfield Management
New York
$27.3M – – –
Vanguard Group
10
Vanguard Group
Pennsylvania
$26.3M +$2.52M +7,840 +9%
FCMI
11
Foresite Capital Management IV
California
$24.3M – – –
JP Morgan Chase
12
JP Morgan Chase
New York
$22.1M +$8.1M +25,244 +48%
Victory Capital Management
13
Victory Capital Management
Texas
$20.4M -$4.74M -14,765 -17%
State Street
14
State Street
Massachusetts
$15.1M +$12.5M +38,990 +270%
HMC
15
Harvard Management Company
Massachusetts
$14.8M +$488K +1,519 +3%
TOCUITCONY
16
Trustees of Columbia University in the City of New York
New York
$8.87M +$10M +31,288 New
Bank of New York Mellon
17
Bank of New York Mellon
New York
$8.34M +$90.8K +283 +1%
Ensign Peak Advisors
18
Ensign Peak Advisors
Utah
$8.3M +$2.37M +7,385 +34%
Geode Capital Management
19
Geode Capital Management
Massachusetts
$6.39M +$749K +2,335 +12%
DGM
20
Darwin Global Management
Jersey
$5.59M +$6.33M +19,719 New
Goldman Sachs
21
Goldman Sachs
New York
$4.71M +$5.09M +15,847 +2,107%
Northern Trust
22
Northern Trust
Illinois
$4.24M -$5.78K -18 -0.1%
American Century Companies
23
American Century Companies
Missouri
$3.4M -$122K -379 -3%
TD Asset Management
24
TD Asset Management
Ontario, Canada
$3.06M +$2.63M +8,206 +318%
Charles Schwab
25
Charles Schwab
California
$2.34M +$58.7K +183 +2%
1
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GBIO Hedge Fund Activity: Q4 2020 in Review

68 of the 5,652 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.