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Generation Bio
GBIO

Overview Fund Activity

60 hedge funds and large institutions have $13.2M invested in Generation Bio in 2025 Q2 according to their latest regulatory filings, with 14 funds opening new positions, 10 increasing their positions, 25 reducing their positions, and 34 closing their positions.

Holders
60
Holders Change
-21
Holders Change %
-25.93%
% of All Funds
0.81%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
14
Increased
10
Reduced
25
Closed
34
Calls
$37K
Puts
–
Net Calls
+$37K
Net Calls Change
+$8K

Top Buyers

1
Millennium Management
1
Millennium Management
New York
$340K
2
YCM
2
Yiheng Capital Management
California
$338K
3
Renaissance Technologies
3
Renaissance Technologies
New York
$826K
4
MCP
4
Militia Capital Partners
Nevada
$174K
5
YIH
5
Y-Intercept (HK)
Hong Kong
$47.4K

Top Sellers

1
Fidelity Investments
1
Fidelity Investments
Massachusetts
$751K
2
BlackRock
2
BlackRock
New York
$372K
3
State Street
3
State Street
Massachusetts
$66K
4
Geode Capital Management
4
Geode Capital Management
Massachusetts
$159K
5
T. Rowe Price Associates
5
T. Rowe Price Associates
Maryland
$2.71M
Name Market Value Shares Shares
Change 		Shares
Change %
T. Rowe Price Associates
1
T. Rowe Price Associates
Maryland
$2.71M 8,462,611 -599,228 -7%
AVLSA
2
Atlas Venture Life Science Advisors
Massachusetts
$2.65M 8,279,484 – –
SL
3
Siren LLC
Connecticut
$950K 2,968,925 – –
Renaissance Technologies
4
Renaissance Technologies
New York
$826K 2,580,780 +700,110 +37%
Fidelity Investments
5
Fidelity Investments
Massachusetts
$751K 2,345,624 -2,406,791 -51%
Vanguard Group
6
Vanguard Group
Pennsylvania
$735K 2,298,347 -321,362 -12%
BBA
7
Baker Bros. Advisors
New York
$623K 1,944,945 – –
Acadian Asset Management
8
Acadian Asset Management
Massachusetts
$393K 1,233,471 +74,336 +6%
BlackRock
9
BlackRock
New York
$372K 1,161,578 -2,243,600 -66%
Goldman Sachs
10
Goldman Sachs
New York
$341K 1,064,090 -22,008 -2%
Millennium Management
11
Millennium Management
New York
$340K 1,061,606 +1,061,606 New
YCM
12
Yiheng Capital Management
California
$338K 1,055,269 +863,739 +451%
Morgan Stanley
13
Morgan Stanley
New York
$292K 912,834 +33,898 +4%
UBS Group
14
UBS Group
Switzerland
$283K 884,902 -92,447 -9%
Bank of America
15
Bank of America
North Carolina
$279K 871,951 -415,235 -32%
MCP
16
Militia Capital Partners
Nevada
$174K 542,347 +542,347 New
Squarepoint
17
Squarepoint
New York
$166K 518,270 +78,957 +18%
Geode Capital Management
18
Geode Capital Management
Massachusetts
$159K 498,080 -610,342 -55%
TD Asset Management
19
TD Asset Management
Ontario, Canada
$109K 340,686 – –
Charles Schwab
20
Charles Schwab
California
$75.8K 236,856 -119,585 -34%
State Street
21
State Street
Massachusetts
$66K 206,116 -799,626 -80%
Citadel Advisors
22
Citadel Advisors
Florida
$61.5K 192,160 +70,805 +58%
Two Sigma Advisers
23
Two Sigma Advisers
New York
$61.3K 191,400 -2,600 -1%
PAI
24
Palo Alto Investors
California
$48.2K 150,475 – –
YIH
25
Y-Intercept (HK)
Hong Kong
$47.4K 148,186 +148,186 New
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