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GBIO

Generation Bio
GBIO

Delisted

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

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2 hedge funds and large institutions have $53.3K invested in Generation Bio in 2026 Q1 according to their latest regulatory filings, with 0 funds opening new positions, 1 increasing their positions, 0 reducing their positions, and 45 closing their positions.

New
Increased
Maintained
Reduced
Closed

64% less ownership

Funds ownership: 64% → 0% (-64%)

96% less funds holding

Funds holding: 48 → 2 (-46)

100% less capital invested

Capital invested by funds: $24.5M → $53.3K (-$24.5M)

100% less funds holding in top 10

Funds holding in top 10: 2 → 0 (-2)

100% less first-time investments, than exits

New positions opened: 0 | Existing positions closed: 45

Holders
2
Holders Change
-46
Holders Change %
-95.83%
% of All Funds
0.02%
Holding in Top 10
–
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-100%
% of All Funds
–
New
–
Increased
1
Reduced
–
Closed
45
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
ACM
Accent Capital Management
Ohio
+$195

Top Sellers

Rank Fund Capital Flow
1
AVLSA
Atlas Venture Life Science Advisors
Massachusetts
-$4.7M
2
SCP
SymBiosis Capital Partners
Arkansas
-$3.78M
3
OM
Opaleye Management
Massachusetts
-$1.76M
4
Renaissance Technologies
Renaissance Technologies
New York
-$1.63M
5
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
-$1.19M
Name Holding Trade Value Shares
Change 		Change in
Stake
ACM
26
ADAR1 Capital Management
Texas
– -$126K -22,144 Closed
State Street
27
State Street
Massachusetts
– -$114K -19,993 Closed
SC
28
Shay Capital
New York
– -$113K -19,839 Closed
CL
29
CSS LLC
Illinois
– -$99.2K -17,464 Closed
Northern Trust
30
Northern Trust
Illinois
– -$96.9K -17,058 Closed
PAI
31
Palo Alto Investors
California
– -$85.5K -15,047 Closed
Manulife (Manufacturers Life Insurance)
32
Manulife (Manufacturers Life Insurance)
Ontario, Canada
– -$80.5K -14,398 Closed
XT
33
XTX Topco
Cayman Islands
– -$74.5K -13,122 Closed
Two Sigma Advisers
34
Two Sigma Advisers
New York
– -$67.8K -11,930 Closed
SFCM
35
Seven Fleet Capital Management
California
– -$30.5K -5,376 Closed
Fidelity Investments
36
Fidelity Investments
Massachusetts
– -$14.9K -2,617 Closed
Royal Bank of Canada
37
Royal Bank of Canada
Ontario, Canada
– -$6K -992 Closed
JP Morgan Chase
38
JP Morgan Chase
New York
– -$3.91K -689 Closed
Rockefeller Capital Management
39
Rockefeller Capital Management
New York
– -$2.84K -500 Closed
SCM
40
Sterling Capital Management
North Carolina
– -$1.1K -194 Closed
BNP Paribas Financial Markets
41
BNP Paribas Financial Markets
France
– -$835 -147 Closed
SS
42
SBI Securities
Japan
– -$301 -53 Closed
Wells Fargo
43
Wells Fargo
California
– -$284 -50 Closed
Optiver Holding
44
Optiver Holding
Netherlands
– -$11 -2 Closed
SAM
45
Smartleaf Asset Management
Massachusetts
– -$6 -1 Closed
1
2

GBIO Hedge Fund Activity: Q1 2026 in Review

2 of the 8,158 institutional investors tracked by Wall St. Rank reported a position in Generation Bio (GBIO) for Q1 2026, worth a combined $53.3K — down 100% from $24.5M a quarter earlier.

Sellers outnumbered buyers: 45 funds closed out of GBIO and 0 opened new positions — a net loss of 45 holders — while 0 trimmed existing stakes and 1 added.

The largest buyer was Accent Capital Management, adding an estimated $195. The largest seller was Atlas Venture Life Science Advisors, exiting entirely with an estimated $4.7M sold.

  • 2 institutional investors held Generation Bio (GBIO) as of Q1 2026, down from 48 in Q4 2025.
  • Funds reported $53.3K of Generation Bio stock for Q1 2026, down 100% quarter-over-quarter.
  • 0 funds opened new Generation Bio positions in Q1 2026 and 45 closed out, a net change of -45 holders.
  • The largest Generation Bio buyer in Q1 2026 was Accent Capital Management, an estimated $195 added.
  • The largest Generation Bio seller in Q1 2026 was Atlas Venture Life Science Advisors, an estimated $4.7M sold.

Based on aggregated 13F filings for Q1 2026.