BLUE

bluebird bio
BLUE

Overview Fund Activity
Delisted

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

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175 hedge funds and large institutions have $308M invested in bluebird bio in 2023 Q2 according to their latest regulatory filings, with 26 funds opening new positions, 67 increasing their positions, 41 reducing their positions, and 29 closing their positions.

Holders
175
Holders Change
-3
Holders Change %
-1.69%
% of All Funds
2.76%
Holding in Top 10
2
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+100%
% of All Funds
0.03%
New
26
Increased
67
Reduced
41
Closed
29
Calls
$3.89M
Puts
$5.74M
Net Calls
-$1.85M
Net Calls Change
-$1.36M

Top Buyers

1
GIM
1
Granahan Investment Management
Massachusetts
$16M
2
PHS
2
PFM Health Sciences
California
$24M
3
PAMS
3
Pictet Asset Management (Switzerland)
Switzerland
$15.4M
4
Walleye Capital
4
Walleye Capital
New York
$2.75M
5
Jacobs Levy Equity Management
5
Jacobs Levy Equity Management
New Jersey
$6.88M

Top Sellers

1
TCM
1
Tang Capital Management
California
$24.3M
2
DM
2
Deerfield Management
New York
$0
3
Citadel Advisors
3
Citadel Advisors
Florida
$1.44M
4
Millennium Management
4
Millennium Management
New York
$0
5
State Street
5
State Street
Massachusetts
$53.8M
Name Market Value Shares Shares
Change 		Shares
Change %
MIM
76
MetLife Investment Management
New Jersey
$179K 54,527 – –
CANY
77
Caxton Associates (New York)
New York
$174K 52,925 +52,925 New
AIG
78
American International Group
New York
$169K 51,510 +1,764 +4%
Tudor Investment Corp
79
Tudor Investment Corp
Connecticut
$164K 49,704 -274,297 -85%
CAPTRUST Financial Advisors
80
CAPTRUST Financial Advisors
North Carolina
$161K 48,974 +35,701 +269%
VOYA Investment Management
81
VOYA Investment Management
Georgia
$143K 43,547 +4,600 +12%
T. Rowe Price Associates
82
T. Rowe Price Associates
Maryland
$143K 43,313 +9,224 +27%
Manulife (Manufacturers Life Insurance)
83
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$142K 43,031 +11,258 +35%
GS
84
GTS Securities
New York
$137K 41,554 +41,554 New
Janus Henderson Group
85
Janus Henderson Group
United Kingdom
$133K 40,595 -43 -0.1%
CG
86
Colony Group
Massachusetts
$129K 39,319 -1,666 -4%
Principal Financial Group
87
Principal Financial Group
Iowa
$126K 38,391 +7,034 +22%
HKAM
88
Horizon Kinetics Asset Management
New York
$125K 38,000 – –
Allspring Global Investments
89
Allspring Global Investments
North Carolina
$125K 37,905 +32,540 +607%
Norges Bank
90
Norges Bank
Norway
$123K 37,391 – –
Mariner
91
Mariner
Kansas
$117K 35,652 -3,840 -10%
DTL
92
Dynamic Technology Lab
Singapore
$114K 34,654 +34,654 New
QC
93
Quent Capital
New York
$109K 33,000 – –
D.E. Shaw & Co
94
D.E. Shaw & Co
New York
$108K 32,960 +32,960 New
JFG
95
Jefferies Financial Group
New York
$103K 31,453 +31,453 New
American Century Companies
96
American Century Companies
Missouri
$100K 30,513 +15,720 +106%
State Board of Administration of Florida Retirement System
97
State Board of Administration of Florida Retirement System
Florida
$99.9K 30,376 +2,680 +10%
ASRS
98
Arizona State Retirement System
Arizona
$98.3K 29,877 +55 +0.2%
Cerity Partners
99
Cerity Partners
New York
$97.5K 29,623 +10,000 +51%
Teacher Retirement System of Texas
100
Teacher Retirement System of Texas
Texas
$95K 28,847 -2,859 -9%
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