BLUE

bluebird bio
BLUE

Overview Fund Activity
Delisted

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

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186 hedge funds and large institutions have $182M invested in bluebird bio in 2023 Q4 according to their latest regulatory filings, with 54 funds opening new positions, 63 increasing their positions, 39 reducing their positions, and 32 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
186
Holders Change
+19
Holders Change %
+11.38%
% of All Funds
2.73%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
54
Increased
63
Reduced
39
Closed
32
Calls
$5.42M
Puts
$5.25M
Net Calls
+$166K
Net Calls Change
+$1.28M

Top Buyers

1
Alyeska Investment Group
1
Alyeska Investment Group
Illinois
$9.54M
2
Norges Bank
2
Norges Bank
Norway
$5.51M
3
PAI
3
Palo Alto Investors
California
$4.6M
4
Vanguard Group
4
Vanguard Group
Pennsylvania
$12.1M
5
GCM
5
Ghisallo Capital Management
Massachusetts
$4.35M

Top Sellers

1
BBA
1
Baker Bros. Advisors
New York
$0
2
PHS
2
PFM Health Sciences
California
$2.82M
3
TCM
3
Tang Capital Management
California
$2.35M
4
WP
4
Woodline Partners
California
$690K
5
CS
5
Credit Suisse
Switzerland
$97.5K
Name Holding Trade Value Shares
Change 		Shares
Change %
GTC
51
Ghost Tree Capital
New York
$642K +$642K +23,250 New
GCM
52
Graham Capital Management
Connecticut
$628K +$628K +22,766 New
Bank of New York Mellon
53
Bank of New York Mellon
New York
$580K +$12.1K +439 +2%
Two Sigma Advisers
54
Two Sigma Advisers
New York
$509K +$509K +18,430 New
Jane Street
55
Jane Street
New York
$471K -$367K -13,285 -44%
BC
56
Birchview Capital
Vermont
$443K -$185K -6,700 -29%
Nuveen Asset Management
57
Nuveen Asset Management
Illinois
$427K +$5.49K +199 +1%
Charles Schwab
58
Charles Schwab
California
$406K +$3.17K +115 +0.8%
Simplex Trading
59
Simplex Trading
Illinois
$349K +$3.53K +128 +1%
Mirae Asset Global Investments
60
Mirae Asset Global Investments
South Korea
$324K -$464K -16,798 -59%
VF
61
Virtu Financial
New York
$317K +$317K +11,477 New
PA
62
Profund Advisors
Maryland
$288K -$10.9K -396 -4%
New York State Common Retirement Fund
63
New York State Common Retirement Fund
New York
$263K +$105K +3,824 +67%
AQR Capital Management
64
AQR Capital Management
Connecticut
$259K +$238K +8,615 +1,113%
SXL
65
Summit X LLC
Missouri
$247K +$22.9K +830 +10%
AllianceBernstein
66
AllianceBernstein
Tennessee
$233K +$15.7K +568 +7%
RhumbLine Advisers
67
RhumbLine Advisers
Massachusetts
$229K -$414 -15 -0.2%
MAM
68
Monaco Asset Management
Monaco
$207K +$207K +7,500 New
EGM
69
Engineers Gate Manager
New York
$161K +$92.6K +3,354 +135%
PAM
70
Panagora Asset Management
Massachusetts
$156K -$330K -11,963 -68%
GS
71
GTS Securities
New York
$155K +$82.7K +2,995 +114%
SSA
72
Schonfeld Strategic Advisors
New York
$152K +$152K +5,498 New
Tudor Investment Corp
73
Tudor Investment Corp
Connecticut
$149K -$94.9K -3,438 -39%
6CM
74
683 Capital Management
New York
$138K +$138K +5,000 New
American Century Companies
75
American Century Companies
Missouri
$138K +$76.6K +2,777 +125%
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