BLUE

bluebird bio
BLUE

Overview Fund Activity
Delisted

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

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235 hedge funds and large institutions have $5.86B invested in bluebird bio in 2015 Q2 according to their latest regulatory filings, with 53 funds opening new positions, 71 increasing their positions, 88 reducing their positions, and 24 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
235
Holders Change
+25
Holders Change %
+11.9%
% of All Funds
6.34%
Holding in Top 10
8
Holding in Top 10 Change
+4
Holding in Top 10 Change %
+100%
% of All Funds
0.22%
New
53
Increased
71
Reduced
88
Closed
24
Calls
$117M
Puts
$112M
Net Calls
+$4.88M
Net Calls Change
-$22.4M

Top Buyers

1
Baillie Gifford & Co
1
Baillie Gifford & Co
United Kingdom
$623M
2
Vanguard Group
2
Vanguard Group
Pennsylvania
$349M
3
Fidelity Investments
3
Fidelity Investments
Massachusetts
$903M
4
O
4
OrbiMed
New York
$161M
5
Capital Research Global Investors
5
Capital Research Global Investors
California
$738M

Top Sellers

1
Millennium Management
1
Millennium Management
New York
$26.1M
2
BFA
2
BlackRock Fund Advisors
California
$116M
3
DM
3
Deerfield Management
New York
$55M
4
UBS AM
4
UBS AM
Illinois
$44M
5
FCM
5
Frontier Capital Management
Massachusetts
$3.71M
Name Holding Trade Value Shares
Change 		Shares
Change %
Allianz Asset Management
101
Allianz Asset Management
Germany
$4.4M -$13.7M -6,279 -76%
Principal Financial Group
102
Principal Financial Group
Iowa
$4.36M -$4.14M -1,896 -49%
State of Wisconsin Investment Board
103
State of Wisconsin Investment Board
Wisconsin
$4.24M +$4.24M +1,945 New
NFA
104
Nationwide Fund Advisors
Ohio
$4.16M -$6.39M -2,932 -61%
HI
105
HBK Investments
Texas
$4.09M +$4.09M +1,875 New
Ohio Public Employees Retirement System (OPERS)
106
Ohio Public Employees Retirement System (OPERS)
Ohio
$4.07M +$4.07M +1,865 New
OA
107
Omega Advisors
New York
$4.04M +$4.04M +1,852 New
CWM
108
Cabot Wealth Management
Massachusetts
$3.96M -$1.22M -561 -24%
DS
109
DRW Securities
Illinois
$3.78M +$3.78M +1,732 New
FCM
110
Frontier Capital Management
Massachusetts
$3.71M -$38.4M -17,603 -91%
BIM
111
BlackRock Investment Management
Delaware
$3.61M -$9.06M -4,153 -72%
EI
112
EAM Investors
California
$3.45M -$3.91M -1,792 -53%
Jane Street
113
Jane Street
New York
$3.44M +$2.45M +1,121 +245%
BAMS
114
Bellevue Asset Management (Switzerland)
Switzerland
$3.37M +$1.01M +463 +43%
WC
115
Woodstock Corp
Massachusetts
$3.3M – – –
AllianceBernstein
116
AllianceBernstein
Tennessee
$3.2M -$3.37M -1,546 -51%
ACM
117
Atika Capital Management
New York
$3.2M +$168K +77 +6%
Connor, Clark & Lunn Investment Management (CC&L)
118
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$3.19M -$10.8M -4,945 -77%
ACA
119
Apis Capital Advisors
New York
$3.11M -$227K -104 -7%
BG
120
BlackRock Group
United Kingdom
$3.08M +$1.08M +495 +54%
UBS Group
121
UBS Group
Switzerland
$2.93M -$2.84M -1,302 -49%
EIM
122
Essex Investment Management
Massachusetts
$2.77M +$1.6M +733 +136%
RFC
123
Russell Frank Company
Washington
$2.74M -$1.42M -652 -34%
BJL
124
Brighton Jones LLC
Washington
$2.69M -$172K -79 -6%
UOC
125
UBS O'Connor
Illinois
$2.65M +$2.65M +1,216 New
3 4
5
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