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GBIO

Generation Bio
GBIO

Delisted

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

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48 hedge funds and large institutions have $581M invested in Generation Bio in 2020 Q2 according to their latest regulatory filings, with 48 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed

6.14% more ownership

Funds ownership: 0% → 6.14% (+6.1%)

Holders
48
Holders Change
+48
Holders Change %
–
% of All Funds
0.98%
Holding in Top 10
1
Holding in Top 10 Change
+1
Holding in Top 10 Change %
% of All Funds
0.02%
New
48
Increased
–
Reduced
–
Closed
–
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Fidelity Investments
Fidelity Investments
Massachusetts
+$164M
2
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
+$93.1M
3
AG
Artal Group
Luxembourg
+$62.7M
4
FCM
Farallon Capital Management
California
+$47.2M
5
Wellington Management Group
Wellington Management Group
Massachusetts
+$46.1M

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change 		Change in
Stake
Fidelity Investments
1
Fidelity Investments
Massachusetts
$144M +$164M +737,387 New
T. Rowe Price Associates
2
T. Rowe Price Associates
Maryland
$84.6M +$93.1M +418,118 New
AG
3
Artal Group
Luxembourg
$59.1M +$62.7M +281,419 New
FCM
4
Farallon Capital Management
California
$44.5M +$47.2M +211,882 New
Wellington Management Group
5
Wellington Management Group
Massachusetts
$42.6M +$46.1M +207,131 New
CC
6
Casdin Capital
New York
$33.8M +$35.9M +161,121 New
BG
7
Bellevue Group
Switzerland
$30.2M +$32.1M +144,000 New
DM
8
Deerfield Management
New York
$24.9M +$26.4M +118,622 New
FCMI
9
Foresite Capital Management IV
California
$18M +$19.1M +85,794 New
Victory Capital Management
10
Victory Capital Management
Texas
$17.8M +$18.9M +84,869 New
Citadel Advisors
11
Citadel Advisors
Florida
$11.4M +$12.1M +54,310 New
SAM
12
Sectoral Asset Management
Quebec, Canada
$10.7M +$11.4M +51,130 New
HMC
13
Harvard Management Company
Massachusetts
$10.6M +$11.3M +50,627 New
JP Morgan Chase
14
JP Morgan Chase
New York
$9.81M +$10.4M +46,695 New
LGM
15
Logos Global Management
California
$6.83M +$7.24M +32,500 New
Millennium Management
16
Millennium Management
New York
$5.51M +$5.85M +26,241 New
Ensign Peak Advisors
17
Ensign Peak Advisors
Utah
$2.75M +$2.92M +13,100 New
American Century Companies
18
American Century Companies
Missouri
$2.57M +$2.72M +12,217 New
ACP
19
Acuta Capital Partners
California
$2.1M +$2.23M +10,000 New
HM
20
HealthCor Management
New York
$2.1M +$2.23M +10,000 New
Alyeska Investment Group
21
Alyeska Investment Group
Illinois
$1.58M +$1.68M +7,537 New
GGHC
22
Gilder Gagnon Howe & Co
New York
$1.49M +$1.58M +7,074 New
Janus Henderson Group
23
Janus Henderson Group
United Kingdom
$1.35M +$1.43M +6,417 New
Goldman Sachs
24
Goldman Sachs
New York
$1.1M +$1.17M +5,260 New
MS
25
Maven Securities
Jersey
$1.05M +$1.11M +5,000 New
1
2

GBIO Hedge Fund Activity: Q2 2020 in Review

48 of the 4,878 institutional investors tracked by Wall St. Rank reported a position in Generation Bio (GBIO) for Q2 2020, worth a combined $581M.

Buyers outnumbered sellers: 48 funds opened new GBIO positions and 0 closed out — a net gain of 48 holders — while 0 added to existing stakes and 0 trimmed.

The largest buyer was Fidelity Investments, opening a new position worth an estimated $164M.

  • 48 institutional investors held Generation Bio (GBIO) as of Q2 2020, up from 0 in Q1 2020.
  • Funds reported $581M of Generation Bio stock for Q2 2020.
  • 48 funds opened new Generation Bio positions in Q2 2020 and 0 closed out, a net change of +48 holders.
  • The largest Generation Bio buyer in Q2 2020 was Fidelity Investments, an estimated $164M added.

Based on aggregated 13F filings for Q2 2020.