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GBIO

Generation Bio
GBIO

Delisted

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

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68 hedge funds and large institutions have $906M invested in Generation Bio in 2020 Q4 according to their latest regulatory filings, with 21 funds opening new positions, 26 increasing their positions, 10 reducing their positions, and 6 closing their positions.

New
Increased
Maintained
Reduced
Closed

250% more first-time investments, than exits

New positions opened: 21 | Existing positions closed: 6

160% more repeat investments, than reductions

Existing positions increased: 26 | Existing positions reduced: 10

100% more funds holding in top 10

Funds holding in top 10: 2 → 4 (+2)

28% more funds holding

Funds holding: 53 → 68 (+15)

1% more capital invested

Capital invested by funds: $896M → $906M (+$9.93M)

0.54% more ownership

Funds ownership: 6.34% → 6.87% (+0.54%)

Holders
68
Holders Change
+15
Holders Change %
+28.3%
% of All Funds
1.2%
Holding in Top 10
4
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+100%
% of All Funds
0.07%
New
21
Increased
26
Reduced
10
Closed
6
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$21.4M
2
BG
Bellevue Group
Switzerland
+$14.5M
3
State Street
State Street
Massachusetts
+$12.5M
4
JP Morgan Chase
JP Morgan Chase
New York
+$8.1M
5
Goldman Sachs
Goldman Sachs
New York
+$5.09M

Top Sellers

Rank Fund Capital Flow
1
Fidelity Investments
Fidelity Investments
Massachusetts
-$6.18M
2
Wellington Management Group
Wellington Management Group
Massachusetts
-$5.87M
3
Victory Capital Management
Victory Capital Management
Texas
-$4.74M
4
Janus Henderson Group
Janus Henderson Group
United Kingdom
-$1.17M
5
CCM
CAAS Capital Management
New York
-$1.08M
Name Holding Trade Value Shares
Change 		Change in
Stake
N
26
Nuveen
North Carolina
$1.32M +$19.3K +60 +1%
PMAM
27
Penn Mutual Asset Management
Pennsylvania
$1.15M +$1.3M +4,055 New
Millennium Management
28
Millennium Management
New York
$971K +$1.1M +3,426 New
Swiss National Bank
29
Swiss National Bank
Switzerland
$743K +$841K +2,620 New
Ameriprise
30
Ameriprise
Minnesota
$703K +$164K +510 +26%
California Public Employees Retirement System
31
California Public Employees Retirement System
California
$691K -$16K -50 -2%
CS
32
Credit Suisse
Switzerland
$597K +$676K +2,105 New
DekaBank Deutsche Girozentrale
33
DekaBank Deutsche Girozentrale
Germany
$563K +$549K +1,710 New
SFI
34
Susquehanna Fundamental Investments
Pennsylvania
$553K – – –
California State Teachers Retirement System (CalSTRS)
35
California State Teachers Retirement System (CalSTRS)
California
$527K – – –
State of Wisconsin Investment Board
36
State of Wisconsin Investment Board
Wisconsin
$490K +$555K +1,730 New
LGM
37
Logos Global Management
California
$482K +$546K +1,700 New
D.E. Shaw & Co
38
D.E. Shaw & Co
New York
$464K +$525K +1,635 New
Squarepoint
39
Squarepoint
New York
$391K +$442K +1,378 New
RhumbLine Advisers
40
RhumbLine Advisers
Massachusetts
$388K +$79.3K +247 +22%
New York State Common Retirement Fund
41
New York State Common Retirement Fund
New York
$318K +$180K +560 +100%
JG
42
Jefferies Group
New York
$284K +$321K +1,000 New
ProShare Advisors
43
ProShare Advisors
Maryland
$281K +$318K +990 New
SCM
44
SCS Capital Management
Massachusetts
$276K +$312K +972 New
SRA
45
Summit Rock Advisors
New York
$258K +$292K +911 New
Morgan Stanley
46
Morgan Stanley
New York
$257K +$229K +715 +372%
Deutsche Bank
47
Deutsche Bank
Germany
$255K +$78.6K +245 +37%
Manulife (Manufacturers Life Insurance)
48
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$204K +$19.9K +62 +9%
Wells Fargo
49
Wells Fargo
California
$198K -$78K -243 -26%
TRSOTSOK
50
Teachers Retirement System of the State of Kentucky
Kentucky
$193K – – –
1
2
3

GBIO Hedge Fund Activity: Q4 2020 in Review

68 of the 5,652 institutional investors tracked by Wall St. Rank reported a position in Generation Bio (GBIO) for Q4 2020, worth a combined $906M — up 1.1% from $896M a quarter earlier.

Buyers outnumbered sellers: 21 funds opened new GBIO positions and 6 closed out — a net gain of 15 holders — while 26 added to existing stakes and 10 trimmed.

The largest buyer was BlackRock, adding an estimated $21.4M. The largest seller was Fidelity Investments, cutting an estimated $6.18M.

  • 68 institutional investors held Generation Bio (GBIO) as of Q4 2020, up from 53 in Q3 2020.
  • Funds reported $906M of Generation Bio stock for Q4 2020, up 1.1% quarter-over-quarter.
  • 21 funds opened new Generation Bio positions in Q4 2020 and 6 closed out, a net change of +15 holders.
  • The largest Generation Bio buyer in Q4 2020 was BlackRock, an estimated $21.4M added.
  • The largest Generation Bio seller in Q4 2020 was Fidelity Investments, an estimated $6.18M sold.

Based on aggregated 13F filings for Q4 2020.