BLUE

bluebird bio
BLUE

Overview Fund Activity
Delisted

BLUE was delisted on the 30th of May, 2025.

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229 hedge funds and large institutions have $1.59B invested in bluebird bio in 2021 Q1 according to their latest regulatory filings, with 48 funds opening new positions, 85 increasing their positions, 64 reducing their positions, and 78 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
229
Holders Change
-33
Holders Change %
-12.6%
% of All Funds
4.03%
Holding in Top 10
1
Holding in Top 10 Change
+1
Holding in Top 10 Change %
%
% of All Funds
0.02%
New
48
Increased
85
Reduced
64
Closed
78
Calls
$25.8M
Puts
$45.8M
Net Calls
-$20M
Net Calls Change
-$16.8M

Top Buyers

1
Wellington Management Group
Wellington Management Group
Massachusetts
+$47.3M
2
AC
Armistice Capital
New York
+$32.7M
3
SCM
Suvretta Capital Management
New York
+$26.4M
4
SC
Sessa Capital
New York
+$26.4M
5
CS
Credit Suisse
Switzerland
+$24.5M

Top Sellers

1
Capital Research Global Investors
Capital Research Global Investors
California
-$352M
2
Sands Capital Management
Sands Capital Management
Virginia
-$137M
3
Capital World Investors
Capital World Investors
California
-$135M
4
Capital International Investors
Capital International Investors
California
-$48.8M
5
CC
Casdin Capital
New York
-$39.6M
Name Holding Trade Value Shares
Change 		Shares
Change %
VOYA Investment Management
126
VOYA Investment Management
Georgia
$454K -$23.8K -61 -5%
MCM
127
Mason Capital Management
New York
$452K +$452K +1,158 New
HT
128
HAP Trading
New York
$436K +$436K +1,117 New
MIFH
129
Migdal Insurance & Financial Holdings
Israel
$435K +$270K +691 +163%
EAM
130
Erste Asset Management
Austria
$429K -$588K -1,586 -58%
Cambridge Investment Research Advisors
131
Cambridge Investment Research Advisors
Iowa
$425K +$52K +133 +14%
Walleye Trading
132
Walleye Trading
New York
$412K +$412K +1,054 New
Fidelity Investments
133
Fidelity Investments
Massachusetts
$382K -$731K -1,875 -66%
Handelsbanken Fonder
134
Handelsbanken Fonder
Sweden
$378K – – –
PA
135
Profund Advisors
Maryland
$357K -$51.2K -131 -13%
Osaic Holdings
136
Osaic Holdings
Arizona
$356K +$23.9K +61 +7%
WM
137
WS Management
Florida
$338K -$17.2K -44 -5%
IBT
138
International Biotechnology Trust
United Kingdom
$332K – – –
SCA
139
Spearhead Capital Advisors
Florida
$322K +$322K +824 New
ProShare Advisors
140
ProShare Advisors
Maryland
$318K -$27K -69 -8%
WC
141
Woodstock Corp
Massachusetts
$311K +$118K +302 +61%
SPA
142
Sentinel Pension Advisors
Massachusetts
$302K +$302K +772 New
AB
143
Amalgamated Bank
New York
$296K -$21.1K -54 -7%
AQR Capital Management
144
AQR Capital Management
Connecticut
$290K +$140K +363 +93%
PHK
145
Point72 Hong Kong
Hong Kong
$286K +$22.7K +58 +9%
Creative Planning
146
Creative Planning
Kansas
$281K +$281K +720 New
Public Employees Retirement Association of Colorado
147
Public Employees Retirement Association of Colorado
Colorado
$263K – – –
Zurich Cantonal Bank
148
Zurich Cantonal Bank
Switzerland
$257K – – –
PCS
149
Personal CFO Solutions
New Jersey
$256K -$3.12K -8 -1%
State of Wisconsin Investment Board
150
State of Wisconsin Investment Board
Wisconsin
$256K -$390 -1 -0.2%
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