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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
Fidelity Investments
1
Fidelity Investments
Massachusetts
$220M -$11.7K -49 -0%
T. Rowe Price Associates
2
T. Rowe Price Associates
Maryland
$129M +$3.34M +13,978 +3%
AG
3
Artal Group
Luxembourg
$87M – – –
Wellington Management Group
4
Wellington Management Group
Massachusetts
$76.3M +$9.94M +41,583 +20%
FCM
5
Farallon Capital Management
California
$65.5M +$43.3K +181 +0.1%
BG
6
Bellevue Group
Switzerland
$58.1M +$10.5M +44,000 +31%
CC
7
Casdin Capital
New York
$49.8M – – –
DM
8
Deerfield Management
New York
$29.7M -$5.38M -22,500 -19%
Victory Capital Management
9
Victory Capital Management
Texas
$26.8M +$438K +1,831 +2%
FCMI
10
Foresite Capital Management IV
California
$26.5M – – –
Vanguard Group
11
Vanguard Group
Pennsylvania
$26.2M +$19.1M +79,805 +1,596%
BlackRock
12
BlackRock
New York
$20.7M +$15.6M +65,174 +3,342%
JP Morgan Chase
13
JP Morgan Chase
New York
$16.3M +$1.43M +5,968 +13%
HMC
14
Harvard Management Company
Massachusetts
$15.6M – – –
Bank of New York Mellon
15
Bank of New York Mellon
New York
$9.01M +$6.24M +26,108 +863%
Ensign Peak Advisors
16
Ensign Peak Advisors
Utah
$6.77M +$2.1M +8,797 +67%
Geode Capital Management
17
Geode Capital Management
Massachusetts
$6.25M +$4.25M +17,786 +730%
Northern Trust
18
Northern Trust
Illinois
$4.63M +$3.58M +14,968 New
State Street
19
State Street
Massachusetts
$4.46M +$3.45M +14,416 New
American Century Companies
20
American Century Companies
Missouri
$3.82M +$36.8K +154 +1%
Charles Schwab
21
Charles Schwab
California
$2.5M +$1.93M +8,077 New
N
22
Nuveen
North Carolina
$1.42M +$1.1M +4,601 New
Janus Henderson Group
23
Janus Henderson Group
United Kingdom
$1.17M -$630K -2,636 -41%
SAM
24
Sectoral Asset Management
Quebec, Canada
$1.08M -$11.4M -47,630 -93%
CCM
25
CAAS Capital Management
New York
$1.08M – – –
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.