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GBIO

Generation Bio
GBIO

Delisted

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

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81 hedge funds and large institutions have $1.2B invested in Generation Bio in 2021 Q3 according to their latest regulatory filings, with 9 funds opening new positions, 32 increasing their positions, 25 reducing their positions, and 24 closing their positions.

New
Increased
Maintained
Reduced
Closed

28% more repeat investments, than reductions

Existing positions increased: 32 | Existing positions reduced: 25

0.24% more ownership

Funds ownership: 8.21% → 8.45% (+0.24%)

4% less capital invested

Capital invested by funds: $1.25B → $1.2B (-$45.6M)

16% less funds holding

Funds holding: 97 → 81 (-16)

63% less first-time investments, than exits

New positions opened: 9 | Existing positions closed: 24

93% less call options, than puts

Call options by funds: $216K | Put options by funds: $2.9M

Holders
81
Holders Change
-16
Holders Change %
-16.49%
% of All Funds
1.42%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
9
Increased
32
Reduced
25
Closed
24
Calls
$216K
Puts
$2.9M
Net Calls
-$2.68M
Net Calls Change
+$391K

Top Buyers

Rank Fund Capital Flow
1
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
+$30.3M
2
MWNA
Marshall Wace North America
New York
+$9.54M
3
JP Morgan Chase
JP Morgan Chase
New York
+$8.23M
4
Vanguard Group
Vanguard Group
Pennsylvania
+$7.8M
5
BlackRock
BlackRock
New York
+$6.58M

Top Sellers

Rank Fund Capital Flow
1
State Street
State Street
Massachusetts
-$10.3M
2
CC
Casdin Capital
New York
-$6.87M
3
American Century Companies
American Century Companies
Missouri
-$6.63M
4
AIC
AWM Investment Company
New York
-$6.07M
5
D.E. Shaw & Co
D.E. Shaw & Co
New York
-$2.8M
Name Holding Trade Value Shares
Change 		Change in
Stake
Daiwa Securities Group
76
Daiwa Securities Group
Japan
$5K +$1.92K +8 +73%
TWA
77
TCI Wealth Advisors
Arizona
$4K +$3.35K +14 New
PHK
78
Point72 Hong Kong
Hong Kong
$3K +$2.4K +10 New
S
79
SignatureFD
Georgia
$1K – – –
FHA
80
First Horizon Advisors
Tennessee
$1K +$718 +3 +100%
Nisa Investment Advisors
81
Nisa Investment Advisors
Missouri
$95 +$71.8K +300 +375%
American Century Companies
82
American Century Companies
Missouri
– -$6.63M -24,638 Closed
AIC
83
AWM Investment Company
New York
– -$6.07M -22,560 Closed
Millennium Management
84
Millennium Management
New York
– -$1.01M -3,744 Closed
Squarepoint
85
Squarepoint
New York
– -$617K -2,294 Closed
SFI
86
Susquehanna Fundamental Investments
Pennsylvania
– -$525K -1,950 Closed
Citadel Advisors
87
Citadel Advisors
Florida
– -$460K -1,920 Closed
UBS Group
88
UBS Group
Switzerland
– -$463K -1,722 Closed
SAM
89
Sectoral Asset Management
Quebec, Canada
– -$444K -1,652 Closed
DIA
90
Dana Investment Advisors
Wisconsin
– -$433K -1,610 Closed
PP
91
PDT Partners
New York
– -$340K -1,264 Closed
Thrivent Financial for Lutherans
92
Thrivent Financial for Lutherans
Minnesota
– -$296K -1,102 Closed
DGM
93
Darwin Global Management
Jersey
– -$289K -1,074 Closed
DTL
94
Dynamic Technology Lab
Singapore
– -$271K -1,008 Closed
TI
95
Trexquant Investment
Connecticut
– -$232K -861 Closed
Renaissance Technologies
96
Renaissance Technologies
New York
– -$226K -840 Closed
AB
97
Amalgamated Bank
New York
– -$219K -814 Closed
PAG
98
Private Advisor Group
New Jersey
– -$206K -766 Closed
LNWWM
99
Laird Norton Wetherby Wealth Management
California
– -$204K -759 Closed
FC
100
FORA Capital
Florida
– -$30K -111 Closed
1 2 3
4
5

GBIO Hedge Fund Activity: Q3 2021 in Review

81 of the 5,713 institutional investors tracked by Wall St. Rank reported a position in Generation Bio (GBIO) for Q3 2021, worth a combined $1.2B — down 3.7% from $1.25B a quarter earlier.

Sellers outnumbered buyers: 24 funds closed out of GBIO and 9 opened new positions — a net loss of 15 holders — while 25 trimmed existing stakes and 32 added.

The largest buyer was T. Rowe Price Associates, adding an estimated $30.3M. The largest seller was State Street, cutting an estimated $10.3M.

  • 81 institutional investors held Generation Bio (GBIO) as of Q3 2021, down from 97 in Q2 2021.
  • Funds reported $1.2B of Generation Bio stock for Q3 2021, down 3.7% quarter-over-quarter.
  • 9 funds opened new Generation Bio positions in Q3 2021 and 24 closed out, a net change of -15 holders.
  • The largest Generation Bio buyer in Q3 2021 was T. Rowe Price Associates, an estimated $30.3M added.
  • The largest Generation Bio seller in Q3 2021 was State Street, an estimated $10.3M sold.

Based on aggregated 13F filings for Q3 2021.