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GBIO

Generation Bio
GBIO

Delisted

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

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53 hedge funds and large institutions have $896M invested in Generation Bio in 2020 Q3 according to their latest regulatory filings, with 23 funds opening new positions, 13 increasing their positions, 9 reducing their positions, and 18 closing their positions.

New
Increased
Maintained
Reduced
Closed

100% more funds holding in top 10

Funds holding in top 10: 1 → 2 (+1)

54% more capital invested

Capital invested by funds: $581M → $896M (+$316M)

44% more repeat investments, than reductions

Existing positions increased: 13 | Existing positions reduced: 9

28% more first-time investments, than exits

New positions opened: 23 | Existing positions closed: 18

10% more funds holding

Funds holding: 48 → 53 (+5)

0.2% more ownership

Funds ownership: 6.14% → 6.34% (+0.2%)

Holders
53
Holders Change
+5
Holders Change %
+10.42%
% of All Funds
1.07%
Holding in Top 10
2
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+100%
% of All Funds
0.04%
New
23
Increased
13
Reduced
9
Closed
18
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Vanguard Group
Vanguard Group
Pennsylvania
+$19.1M
2
BlackRock
BlackRock
New York
+$15.6M
3
BG
Bellevue Group
Switzerland
+$10.5M
4
Wellington Management Group
Wellington Management Group
Massachusetts
+$9.94M
5
Bank of New York Mellon
Bank of New York Mellon
New York
+$6.24M

Top Sellers

Rank Fund Capital Flow
1
Citadel Advisors
Citadel Advisors
Florida
-$12.7M
2
SAM
Sectoral Asset Management
Quebec, Canada
-$11.4M
3
LGM
Logos Global Management
California
-$6.83M
4
Millennium Management
Millennium Management
New York
-$5.51M
5
DM
Deerfield Management
New York
-$5.38M
Name Holding Trade Value Shares
Change 		Change in
Stake
TD Asset Management
26
TD Asset Management
Ontario, Canada
$798K +$55K +230 +10%
California Public Employees Retirement System
27
California Public Employees Retirement System
California
$768K +$594K +2,486 New
Ameriprise
28
Ameriprise
Minnesota
$609K -$131K -546 -22%
SFI
29
Susquehanna Fundamental Investments
Pennsylvania
$603K +$466K +1,950 New
California State Teachers Retirement System (CalSTRS)
30
California State Teachers Retirement System (CalSTRS)
California
$574K +$444K +1,858 New
Citadel Advisors
31
Citadel Advisors
Florida
$413K -$12.7M -52,975 -98%
RhumbLine Advisers
32
RhumbLine Advisers
Massachusetts
$347K +$269K +1,123 New
Wells Fargo
33
Wells Fargo
California
$291K +$225K +940 New
MFS
34
Mirabella Financial Services
United Kingdom
$275K +$213K +889 New
Goldman Sachs
35
Goldman Sachs
New York
$232K -$1.08M -4,508 -86%
AIG
36
American International Group
New York
$227K +$175K +734 New
TRSOTSOK
37
Teachers Retirement System of the State of Kentucky
Kentucky
$210K – – –
Manulife (Manufacturers Life Insurance)
38
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$203K +$157K +656 New
Deutsche Bank
39
Deutsche Bank
Germany
$202K +$157K +656 New
MIM
40
MetLife Investment Management
New Jersey
$173K +$134K +561 New
New York State Common Retirement Fund
41
New York State Common Retirement Fund
New York
$173K +$134K +560 New
MLICM
42
Metropolitan Life Insurance Company (MetLife)
New York
$119K +$92.1K +385 New
SO
43
STRS Ohio
Ohio
$95K +$74.1K +310 New
TRCT
44
Tower Research Capital (TRC)
New York
$72K +$56.2K +235 New
Morgan Stanley
45
Morgan Stanley
New York
$59K +$45.9K +192 New
Legal & General Group
46
Legal & General Group
United Kingdom
$42K -$382K -1,597 -92%
AIP
47
Ameritas Investment Partners
Nebraska
$32K +$25.1K +105 New
Citigroup
48
Citigroup
New York
$18K +$14.1K +59 New
Bank of Montreal
49
Bank of Montreal
Ontario, Canada
$17K +$13.6K +57 New
Osaic Holdings
50
Osaic Holdings
Arizona
$12K – – –
1
2
3

GBIO Hedge Fund Activity: Q3 2020 in Review

53 of the 4,957 institutional investors tracked by Wall St. Rank reported a position in Generation Bio (GBIO) for Q3 2020, worth a combined $896M — up 54% from $581M a quarter earlier.

Buyers outnumbered sellers: 23 funds opened new GBIO positions and 18 closed out — a net gain of 5 holders — while 13 added to existing stakes and 9 trimmed.

The largest buyer was Vanguard Group, adding an estimated $19.1M. The largest seller was Citadel Advisors, cutting an estimated $12.7M.

  • 53 institutional investors held Generation Bio (GBIO) as of Q3 2020, up from 48 in Q2 2020.
  • Funds reported $896M of Generation Bio stock for Q3 2020, up 54% quarter-over-quarter.
  • 23 funds opened new Generation Bio positions in Q3 2020 and 18 closed out, a net change of +5 holders.
  • The largest Generation Bio buyer in Q3 2020 was Vanguard Group, an estimated $19.1M added.
  • The largest Generation Bio seller in Q3 2020 was Citadel Advisors, an estimated $12.7M sold.

Based on aggregated 13F filings for Q3 2020.