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 %
Renaissance Technologies
76
Renaissance Technologies
New York
$7.68M -$2.85M -1,305 -27%
PP
77
Paloma Partners
Connecticut
$7.6M +$7.6M +3,486 New
Dimensional Fund Advisors
78
Dimensional Fund Advisors
Texas
$7.6M +$2.13M +976 +39%
FT
79
Fiduciary Trust
Massachusetts
$7.58M -$85.1K -39 -1%
RSCM
80
Rock Springs Capital Management
Maryland
$7.58M +$3.37M +1,544 +80%
TD Asset Management
81
TD Asset Management
Ontario, Canada
$7.11M -$150K -69 -2%
TCM
82
Tekla Capital Management
Massachusetts
$6.89M -$2.29M -1,052 -25%
TWMP
83
Taylor Wealth Management Partners
Massachusetts
$6.54M -$21.8K -10 -0.3%
EMFAT
84
Emerald Mutual Fund Advisers Trust
Pennsylvania
$6.36M -$3.73M -1,708 -37%
Capital Fund Management (CFM)
85
Capital Fund Management (CFM)
France
$6.24M +$6.24M +2,861 New
Swiss National Bank
86
Swiss National Bank
Switzerland
$6.23M +$1.06M +487 +21%
SIM
87
Spark Investment Management
New York
$6.06M +$6.06M +2,779 New
California Public Employees Retirement System
88
California Public Employees Retirement System
California
$5.89M +$342K +157 +6%
GCP
89
GSA Capital Partners
United Kingdom
$5.7M +$3.94M +1,805 +223%
State Board of Administration of Florida Retirement System
90
State Board of Administration of Florida Retirement System
Florida
$5.62M +$3.05M +1,400 +119%
AP
91
AlpInvest Partners
Netherlands
$5.44M +$5.44M +2,492 New
RhumbLine Advisers
92
RhumbLine Advisers
Massachusetts
$5.37M +$977K +448 +22%
Arrowstreet Capital
93
Arrowstreet Capital
Massachusetts
$5.25M +$5.25M +2,409 New
TAM
94
Tocqueville Asset Management
New York
$5.24M +$1.23M +562 +31%
NI
95
Numeric Investors
Massachusetts
$4.58M +$3.28M +1,506 +254%
PAM
96
Paradigm Asset Management
New York
$4.5M – – –
QIM
97
Quantitative Investment Management
Virginia
$4.5M +$2.93M +1,343 +187%
D.E. Shaw & Co
98
D.E. Shaw & Co
New York
$4.49M -$294K -135 -6%
Asset Management One
99
Asset Management One
Japan
$4.46M +$4.46M +2,160 New
ProShare Advisors
100
ProShare Advisors
Maryland
$4.42M -$805K -369 -15%
2 3
4
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