BLUE

bluebird bio
BLUE

Overview Fund Activity
Delisted

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

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187 hedge funds and large institutions have $182M invested in bluebird bio in 2023 Q4 according to their latest regulatory filings, with 55 funds opening new positions, 63 increasing their positions, 39 reducing their positions, and 33 closing their positions.

Holders
187
Holders Change
+19
Holders Change %
+11.31%
% of All Funds
2.74%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
55
Increased
63
Reduced
39
Closed
33
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 Market Value Shares Shares
Change 		Shares
Change %
State Street
1
State Street
Massachusetts
$19.1M 13,865,719 +1,200,603 +9%
BlackRock
2
BlackRock
New York
$12.4M 8,983,001 +154,588 +2%
Vanguard Group
3
Vanguard Group
Pennsylvania
$12.1M 8,775,379 +3,157,919 +56%
GIM
4
Granahan Investment Management
Massachusetts
$11.1M 8,077,697 +2,939,919 +57%
Alyeska Investment Group
5
Alyeska Investment Group
Illinois
$9.54M 6,912,502 +6,912,502 New
Pictet Asset Management
6
Pictet Asset Management
Switzerland
$7.85M 5,687,334 +539,781 +10%
Norges Bank
7
Norges Bank
Norway
$5.51M 3,995,600 +3,958,209 +10,586%
Millennium Management
8
Millennium Management
New York
$4.71M 3,413,612 +3,091,425 +960%
PAI
9
Palo Alto Investors
California
$4.6M 3,333,333 +3,333,333 New
GCM
10
Ghisallo Capital Management
Massachusetts
$4.35M 3,150,000 +3,150,000 New
Dimensional Fund Advisors
11
Dimensional Fund Advisors
Texas
$4.13M 2,995,274 +1,306,691 +77%
Two Sigma Investments
12
Two Sigma Investments
New York
$4.02M 2,910,812 +2,910,812 New
Ameriprise
13
Ameriprise
Minnesota
$3.8M 2,755,700 +453,227 +20%
Renaissance Technologies
14
Renaissance Technologies
New York
$3.64M 2,638,700 +2,163,800 +456%
BL
15
Bleichroeder LP
New York
$3.45M 2,500,000 +1,600,000 +178%
Morgan Stanley
16
Morgan Stanley
New York
$3.35M 2,425,012 +2,004,234 +476%
Fidelity Investments
17
Fidelity Investments
Massachusetts
$3.28M 2,376,566 +2,211,345 +1,338%
Geode Capital Management
18
Geode Capital Management
Massachusetts
$3.27M 2,369,684 +148,190 +7%
Hudson Bay Capital Management
19
Hudson Bay Capital Management
Connecticut
$3.01M 2,183,437 +1,855,937 +567%
VPC
20
Vestal Point Capital
New York
$2.97M 2,150,000 +2,150,000 New
PHS
21
PFM Health Sciences
California
$2.82M 2,042,651 -3,998,283 -66%
FCM
22
Farallon Capital Management
California
$2.76M 2,000,000 +2,000,000 New
JPMorgan Chase & Co
23
JPMorgan Chase & Co
New York
$2.42M 1,755,835 +85,054 +5%
FLSM
24
Frazier Life Sciences Management
California
$2.36M 1,709,907 – –
TCM
25
Tang Capital Management
California
$2.35M 1,700,000 -2,582,827 -60%
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