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Generation Bio
GBIO

Overview Fund Activity

79 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.

New
Increased
Maintained
Reduced
Closed
Holders
79
Holders Change
+1
Holders Change %
+1.28%
% of All Funds
1.07%
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
Renaissance Technologies
New York
$762K
2
Acadian Asset Management
Acadian Asset Management
Massachusetts
$468K
3
Squarepoint
Squarepoint
New York
$178K
4
Los Angeles Capital Management
Los Angeles Capital Management
California
$153K
5
Fidelity Investments
Fidelity Investments
Massachusetts
$1.92M

Top Sellers

1
EC
EcoR1 Capital
California
$0
2
JFG
Jefferies Financial Group
New York
$70.3K
3
PHS
PFM Health Sciences
California
$0
4
Bank of America
Bank of America
North Carolina
$521K
5
D.E. Shaw & Co
D.E. Shaw & Co
New York
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
JFG
26
Jefferies Financial Group
New York
$70.3K -$846K -208,816 -92%
NL
27
Nuveen LLC
North Carolina
$68.6K +$68.6K +16,927 New
PAI
28
Palo Alto Investors
California
$60.9K – – –
Manulife (Manufacturers Life Insurance)
29
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$58.3K -$450 -111 -0.8%
Bank of New York Mellon
30
Bank of New York Mellon
New York
$56.6K -$53 -13 -0.1%
Citadel Advisors
31
Citadel Advisors
Florida
$49.1K +$8.53K +2,105 +21%
Deutsche Bank
32
Deutsche Bank
Germany
$44.6K -$30.9K -7,540 -41%
Two Sigma Investments
33
Two Sigma Investments
New York
$42.7K -$6.01K -1,485 -12%
EL
34
EWA LLC
Pennsylvania
$37.6K +$37.6K +9,290 New
Susquehanna International Group
35
Susquehanna International Group
Pennsylvania
$37.4K +$28.1K +6,946 +305%
AQR Capital Management
36
AQR Capital Management
Connecticut
$36.1K +$36.1K +8,901 New
AWM
37
Aegis Wealth Management
Maryland
$36K – – –
PAM
38
Panagora Asset Management
Massachusetts
$35K -$514 -127 -1%
IWC
39
Integrated Wealth Concepts
Massachusetts
$29.5K – – –
AllianceBernstein
40
AllianceBernstein
Tennessee
$29.2K – – –
RhumbLine Advisers
41
RhumbLine Advisers
Massachusetts
$28.2K -$1.5K -370 -5%
Barclays
42
Barclays
United Kingdom
$25K -$10.1K -2,475 -29%
BCM
43
Bridgeway Capital Management
Texas
$22.4K -$77.6K -19,160 -78%
XT
44
XTX Topco
Cayman Islands
$21.2K +$21.2K +5,244 New
KPWS
45
Kestra Private Wealth Services
Texas
$21.1K +$21.1K +5,200 New
Jane Street
46
Jane Street
New York
$15.7K +$15.7K +3,872 New
IIM
47
INTECH Investment Management
Florida
$15.4K +$5.92K +1,461 +63%
Prudential Financial
48
Prudential Financial
New Jersey
$14.4K -$6.24K -1,540 -30%
Citigroup
49
Citigroup
New York
$14.1K -$2.71K -669 -16%
Wells Fargo
50
Wells Fargo
California
$12.2K -$1.07K -264 -8%
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