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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
MIM
51
MetLife Investment Management
New Jersey
$159K – – –
Citigroup
52
Citigroup
New York
$112K +$108K +336 +569%
MLICM
53
Metropolitan Life Insurance Company (MetLife)
New York
$109K – – –
Bank of America
54
Bank of America
North Carolina
$104K +$116K +362 +9,050%
SO
55
STRS Ohio
Ohio
$87K – – –
Royal Bank of Canada
56
Royal Bank of Canada
Ontario, Canada
$60K +$55.5K +173 +433%
Legal & General Group
57
Legal & General Group
United Kingdom
$52K +$14.4K +45 +33%
Bank of Montreal
58
Bank of Montreal
Ontario, Canada
$51K +$42.7K +133 +233%
TRCT
59
Tower Research Capital (TRC)
New York
$44K -$25K -78 -33%
AIP
60
Ameritas Investment Partners
Nebraska
$30K – – –
CLOS
61
Compagnie Lombard Odier SCmA
Switzerland
$30K +$33.7K +105 New
PCM
62
Penserra Capital Management
California
$30K +$34.7K +108 New
Canada Life
63
Canada Life
Manitoba, Canada
$21K +$24.1K +75 New
Pacer Advisors
64
Pacer Advisors
Pennsylvania
$20K +$22.5K +70 New
RFWA
65
RPg Family Wealth Advisory
Massachusetts
$15.9K +$18K +56 New
Osaic Holdings
66
Osaic Holdings
Arizona
$4K -$7.38K -23 -61%
Daiwa Securities Group
67
Daiwa Securities Group
Japan
$2K +$2.89K +9 New
AIG
68
American International Group
New York
$202 -$6.42K -20 -3%
Janus Henderson Group
69
Janus Henderson Group
United Kingdom
– -$1.17M -3,781 Closed
CCM
70
CAAS Capital Management
New York
– -$1.08M -3,500 Closed
SAM
71
Sectoral Asset Management
Quebec, Canada
– -$1.08M -3,500 Closed
Citadel Advisors
72
Citadel Advisors
Florida
– -$413K -1,335 Closed
MFS
73
Mirabella Financial Services
United Kingdom
– -$275K -889 Closed
UBS Group
74
UBS Group
Switzerland
– -$2K -5 Closed
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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.