Rock Springs Capital Management LP - BLUEBIRD BIO INC ownership

BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 306 filers reported holding BLUEBIRD BIO INC in Q1 2018. The put-call ratio across all filers is 0.94 and the average weighting 0.1%.

Quarter-by-quarter ownership
Rock Springs Capital Management LP ownership history of BLUEBIRD BIO INC
ValueSharesWeighting
Q4 2019$3,071,000
-28.8%
35,000
-25.5%
0.10%
-43.6%
Q3 2019$4,316,000
-27.8%
47,0000.0%0.17%
-20.4%
Q2 2019$5,978,000
-15.6%
47,000
+4.4%
0.22%
-20.9%
Q1 2019$7,080,000
+58.6%
45,0000.0%0.27%
+29.4%
Q4 2018$4,464,000
-41.8%
45,000
-14.3%
0.21%
-24.1%
Q3 2018$7,665,000
+8.5%
52,500
+16.7%
0.28%
+2.2%
Q2 2018$7,063,000
-8.1%
45,0000.0%0.27%
-17.1%
Q1 2018$7,684,000
-4.1%
45,0000.0%0.33%
-9.9%
Q4 2017$8,015,000
+66.7%
45,000
+28.6%
0.36%
+64.0%
Q3 2017$4,807,000
+43.0%
35,000
+9.4%
0.22%
+30.6%
Q2 2017$3,362,000
+21.3%
32,000
+4.9%
0.17%
+6.2%
Q1 2017$2,772,000
+57.7%
30,500
+7.0%
0.16%
+35.6%
Q4 2016$1,758,000
+29.6%
28,500
+42.5%
0.12%
+38.8%
Q3 2016$1,356,000
+56.6%
20,0000.0%0.08%
+32.8%
Q2 2016$866,000
+1.9%
20,0000.0%0.06%
-9.9%
Q1 2016$850,000
-33.8%
20,0000.0%0.07%
-26.8%
Q4 2015$1,284,000
-66.6%
20,000
-55.6%
0.10%
-69.0%
Q3 2015$3,850,000
-49.2%
45,0000.0%0.31%
-43.4%
Q2 2015$7,577,000
+151.0%
45,000
+80.0%
0.55%
+96.1%
Q1 2015$3,019,000
+31.7%
25,0000.0%0.28%
+5.2%
Q4 2014$2,293,00025,0000.27%
Other shareholders
BLUEBIRD BIO INC shareholders Q1 2018
NameSharesValueWeighting ↓
Monashee Investment Management LLC 125,000$13,131,0005.55%
Cormorant Asset Management, LP 275,000$28,889,0004.79%
Eventide Asset Management 569,700$59,847,0003.73%
Crosspoint Capital Strategies, LLC 28,937$3,040,0002.66%
Casdin Capital, LLC 65,000$6,828,0002.53%
ARK Investment Management 119,683$12,573,0002.45%
RTW INVESTMENTS, LP 104,383$10,965,0002.31%
Taylor Wealth Management Partners 38,368$4,031,0001.82%
First Light Asset Management, LLC 33,780$3,549,0001.19%
Atika Capital Management LLC 25,000$2,627,0000.92%
View complete list of BLUEBIRD BIO INC shareholders