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Generation Bio
GBIO

Overview Fund Activity

81 hedge funds and large institutions have $19.3M invested in Generation Bio in 2025 Q1 according to their latest regulatory filings, with 10 funds opening new positions, 15 increasing their positions, 37 reducing their positions, and 8 closing their positions.

Holders
81
Holders Change
+1
Holders Change %
+1.25%
% of All Funds
1.1%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
10
Increased
15
Reduced
37
Closed
8
Calls
$29K
Puts
–
Net Calls
+$29K
Net Calls Change
+$23K

Top Buyers

1
Renaissance Technologies
1
Renaissance Technologies
New York
$762K
2
Acadian Asset Management
2
Acadian Asset Management
Massachusetts
$468K
3
Squarepoint
3
Squarepoint
New York
$178K
4
NL
4
Nuveen LLC
North Carolina
$68.6K
5
Los Angeles Capital Management
5
Los Angeles Capital Management
California
$153K

Top Sellers

1
EC
1
EcoR1 Capital
California
$0
2
JFG
2
Jefferies Financial Group
New York
$70.3K
3
PHS
3
PFM Health Sciences
California
$0
4
Bank of America
4
Bank of America
North Carolina
$521K
5
D.E. Shaw & Co
5
D.E. Shaw & Co
New York
$0
Name Market Value Shares Shares
Change 		Shares
Change %
T. Rowe Price Associates
1
T. Rowe Price Associates
Maryland
$3.67M 9,061,839 -217,220 -2%
AVLSA
2
Atlas Venture Life Science Advisors
Massachusetts
$3.35M 8,279,484 – –
Fidelity Investments
3
Fidelity Investments
Massachusetts
$1.92M 4,752,415 +126,370 +3%
BlackRock
4
BlackRock
New York
$1.38M 3,405,178 -53,887 -2%
SL
5
Siren LLC
Connecticut
$1.2M 2,968,925 -13,808 -0.5%
Vanguard Group
6
Vanguard Group
Pennsylvania
$1.06M 2,619,709 -22,287 -0.8%
BBA
7
Baker Bros. Advisors
New York
$788K 1,944,945 – –
Renaissance Technologies
8
Renaissance Technologies
New York
$762K 1,880,670 +917,711 +95%
Bank of America
9
Bank of America
North Carolina
$521K 1,287,186 -1,710,553 -57%
Acadian Asset Management
10
Acadian Asset Management
Massachusetts
$468K 1,159,135 +407,843 +54%
Geode Capital Management
11
Geode Capital Management
Massachusetts
$449K 1,108,422 -28,653 -3%
Goldman Sachs
12
Goldman Sachs
New York
$440K 1,086,098 -122,171 -10%
State Street
13
State Street
Massachusetts
$407K 1,005,742 -33,383 -3%
UBS Group
14
UBS Group
Switzerland
$396K 977,349 -76,160 -7%
Morgan Stanley
15
Morgan Stanley
New York
$356K 878,936 -60,891 -6%
Squarepoint
16
Squarepoint
New York
$178K 439,313 +373,685 +569%
Los Angeles Capital Management
17
Los Angeles Capital Management
California
$153K 378,914 +132,987 +54%
Northern Trust
18
Northern Trust
Illinois
$150K 369,907 -33,160 -8%
Charles Schwab
19
Charles Schwab
California
$144K 356,441 -10,585 -3%
TD Asset Management
20
TD Asset Management
Ontario, Canada
$138K 340,686 – –
JPMorgan Chase & Co
21
JPMorgan Chase & Co
New York
$81.8K 201,959 -95,746 -32%
Two Sigma Advisers
22
Two Sigma Advisers
New York
$78.6K 194,000 -400 -0.2%
Dimensional Fund Advisors
23
Dimensional Fund Advisors
Texas
$77.8K 191,830 -204,407 -52%
YCM
24
Yiheng Capital Management
California
$77.6K 191,530 – –
Jacobs Levy Equity Management
25
Jacobs Levy Equity Management
New Jersey
$73.7K 182,005 -129,530 -42%
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