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
$209M
2
AC
Armistice Capital
New York
$59.2M
3
SCM
Suvretta Capital Management
New York
$39.3M
4
SC
Sessa Capital
New York
$26.4M
5
CS
Credit Suisse
Switzerland
$70M

Top Sellers

1
Capital Research Global Investors
Capital Research Global Investors
California
$0
2
Sands Capital Management
Sands Capital Management
Virginia
$0
3
Capital World Investors
Capital World Investors
California
$0
4
Capital International Investors
Capital International Investors
California
$0
5
CC
Casdin Capital
New York
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
Morgan Stanley
26
Morgan Stanley
New York
$12.1M -$5.08M -13,012 -30%
Ameriprise
27
Ameriprise
Minnesota
$9.85M +$8.7M +22,274 +756%
Northern Trust
28
Northern Trust
Illinois
$9.53M +$75.8K +194 +0.8%
Charles Schwab
29
Charles Schwab
California
$9.3M -$577K -1,478 -6%
Dimensional Fund Advisors
30
Dimensional Fund Advisors
Texas
$8.96M -$2.06M -5,279 -19%
KBC Group
31
KBC Group
Belgium
$8.57M +$2.8M +7,178 +49%
Principal Financial Group
32
Principal Financial Group
Iowa
$8.27M +$4.81M +12,322 +139%
Bank of America
33
Bank of America
North Carolina
$8.12M -$915K -2,343 -10%
Russell Investments Group
34
Russell Investments Group
United Kingdom
$7.24M +$603K +1,546 +9%
GPCM
35
Granite Point Capital Management
Massachusetts
$7.24M +$7.24M +18,528 New
Wells Fargo
36
Wells Fargo
California
$7.21M -$1.47M -3,752 -17%
QOP
37
Quinn Opportunity Partners
Virginia
$7.18M +$7.18M +18,374 New
Marshall Wace
38
Marshall Wace
United Kingdom
$6.93M +$5.96M +15,254 +614%
Two Sigma Investments
39
Two Sigma Investments
New York
$6.9M +$6.53M +16,731 +1,793%
BBA
40
Baker Bros. Advisors
New York
$6.84M – – –
Bank of New York Mellon
41
Bank of New York Mellon
New York
$6.74M -$579K -1,482 -8%
Rafferty Asset Management
42
Rafferty Asset Management
New York
$6.25M +$5.05M +12,927 +421%
Group One Trading
43
Group One Trading
Illinois
$5.63M +$3.2M +8,198 +132%
Tudor Investment Corp
44
Tudor Investment Corp
Connecticut
$5.55M +$3.73M +9,546 +205%
MP
45
Mangrove Partners
Connecticut
$5.28M +$5.28M +13,524 New
Mirae Asset Global Investments
46
Mirae Asset Global Investments
South Korea
$5.13M +$1.64M +4,199 +47%
Citigroup
47
Citigroup
New York
$5.11M +$2.96M +7,577 +137%
Jane Street
48
Jane Street
New York
$5.1M +$1.85M +4,725 +57%
CSS
49
Cubist Systematic Strategies
Connecticut
$4.79M +$1.29M +3,315 +37%
Swiss National Bank
50
Swiss National Bank
Switzerland
$4.57M +$57.4K +147 +1%
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