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BLUE

bluebird bio
BLUE

Delisted

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

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274 hedge funds and large institutions have $5.27B invested in bluebird bio in 2019 Q4 according to their latest regulatory filings, with 69 funds opening new positions, 92 increasing their positions, 70 reducing their positions, and 34 closing their positions.

New
Increased
Maintained
Reduced
Closed

103% more first-time investments, than exits

New positions opened: 69 | Existing positions closed: 34

50% more funds holding in top 10

Funds holding in top 10: 2 → 3 (+1)

44% more call options, than puts

Call options by funds: $103M | Put options by funds: $71.3M

31% more repeat investments, than reductions

Existing positions increased: 92 | Existing positions reduced: 70

14% more funds holding

Funds holding: 241 → 274 (+33)

0.54% less ownership

Funds ownership: 8.93% → 8.39% (-0.54%)

10% less capital invested

Capital invested by funds: $5.87B → $5.27B (-$597M)

Holders
274
Holders Change
+33
Holders Change %
+13.69%
% of All Funds
5.4%
Holding in Top 10
3
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+50%
% of All Funds
0.06%
New
69
Increased
92
Reduced
70
Closed
34
Calls
$103M
Puts
$71.3M
Net Calls
+$31.2M
Net Calls Change
+$52.9M

Top Buyers

Rank Fund Capital Flow
1
Sands Capital Management
Sands Capital Management
Virginia
+$83.6M
2
Citadel Advisors
Citadel Advisors
Florida
+$48.3M
3
TCM
TimesSquare Capital Management
New York
+$46.2M
4
GGHC
Gilder Gagnon Howe & Co
New York
+$40.1M
5
Goldman Sachs
Goldman Sachs
New York
+$30.1M

Top Sellers

Rank Fund Capital Flow
1
Capital International Investors
Capital International Investors
California
-$331M
2
Baillie Gifford & Co
Baillie Gifford & Co
United Kingdom
-$232M
3
Fidelity Investments
Fidelity Investments
Massachusetts
-$142M
4
Invesco
Invesco
Georgia
-$75.9M
5
CII
Capital International Inc
California
-$29.9M
Name Holding Trade Value Shares
Change 		Change in
Stake
GH
76
GAM Holding
Switzerland
$4.35M – – –
RhumbLine Advisers
77
RhumbLine Advisers
Massachusetts
$4.26M +$112K +103 +3%
State of Wisconsin Investment Board
78
State of Wisconsin Investment Board
Wisconsin
$4.23M +$1.75M +1,614 +76%
Rafferty Asset Management
79
Rafferty Asset Management
New York
$3.84M -$1.52M -1,399 -29%
MGI
80
MayTech Global Investments
New York
$3.8M +$966K +889 +36%
State of New Jersey Common Pension Fund D
81
State of New Jersey Common Pension Fund D
New Jersey
$3.67M -$111K -102 -3%
GC
82
Guggenheim Capital
Illinois
$3.63M +$772K +710 +29%
Legal & General Group
83
Legal & General Group
United Kingdom
$3.52M +$430K +396 +15%
BBA
84
Baker Bros. Advisors
New York
$3.51M – – –
Morgan Stanley
85
Morgan Stanley
New York
$3.44M -$360K -331 -10%
MWNA
86
Marshall Wace North America
New York
$3.43M +$3.27M +3,004 +20,027%
Jane Street
87
Jane Street
New York
$3.32M +$1M +922 +46%
EAM
88
Erste Asset Management
Austria
$3.14M – – –
RSCM
89
Rock Springs Capital Management
Maryland
$3.07M -$1.01M -926 -26%
IHAM
90
Integral Health Asset Management
New York
$3.07M +$2.94M +2,702 New
TD Asset Management
91
TD Asset Management
Ontario, Canada
$3.06M +$3.26K +3 +0.1%
KBC Group
92
KBC Group
Belgium
$2.87M +$747K +687 +37%
Creative Planning
93
Creative Planning
Kansas
$2.71M +$2.59M +2,385 New
Janus Henderson Group
94
Janus Henderson Group
United Kingdom
$2.56M +$2.45M +2,255 New
CSS
95
Cubist Systematic Strategies
Connecticut
$2.46M +$766K +705 +48%
ECG
96
EPIQ Capital Group
California
$2.35M +$2.25M +2,071 New
Royal Bank of Canada
97
Royal Bank of Canada
Ontario, Canada
$2.32M -$207K -190 -9%
CM
98
Caption Management
Oklahoma
$2.28M +$553K +509 +34%
Simplex Trading
99
Simplex Trading
Illinois
$2.25M +$1.69M +1,553 +366%
DCM
100
DAFNA Capital Management
California
$2.24M – – –
2 3
4
5 6

BLUE Hedge Fund Activity: Q4 2019 in Review

274 of the 5,076 institutional investors tracked by Wall St. Rank reported a position in bluebird bio (BLUE) for Q4 2019, worth a combined $5.27B — down 10% from $5.87B a quarter earlier.

Buyers outnumbered sellers: 69 funds opened new BLUE positions and 34 closed out — a net gain of 35 holders — while 92 added to existing stakes and 70 trimmed.

The largest buyer was Sands Capital Management, adding an estimated $83.6M. The largest seller was Capital International Investors, cutting an estimated $331M.

  • 274 institutional investors held bluebird bio (BLUE) as of Q4 2019, up from 241 in Q3 2019.
  • Funds reported $5.27B of bluebird bio stock for Q4 2019, down 10% quarter-over-quarter.
  • 69 funds opened new bluebird bio positions in Q4 2019 and 34 closed out, a net change of +35 holders.
  • The largest bluebird bio buyer in Q4 2019 was Sands Capital Management, an estimated $83.6M added.
  • The largest bluebird bio seller in Q4 2019 was Capital International Investors, an estimated $331M sold.

Based on aggregated 13F filings for Q4 2019.