Spark Investment Management LLC - BLUEBIRD BIO INC ownership

BLUEBIRD BIO INC's ticker is BLUE and the CUSIP is 09609G100. A total of 194 filers reported holding BLUEBIRD BIO INC in Q3 2015. The put-call ratio across all filers is 1.12 and the average weighting 0.2%.

Quarter-by-quarter ownership
Spark Investment Management LLC ownership history of BLUEBIRD BIO INC
ValueSharesWeighting
Q3 2015$5,243,000
-13.5%
61,300
+70.3%
0.68%
-19.5%
Q2 2015$6,059,000
+1392.4%
36,000
+140.0%
0.85%
+809.7%
Q3 2013$406,00015,0000.09%
Other shareholders
BLUEBIRD BIO INC shareholders Q3 2015
NameSharesValueWeighting ↓
Sessa Capital IM, L.P. 1,834,965$35,066,0001.72%
Birchview Capital, LP 84,000$1,605,0001.09%
ARMISTICE CAPITAL, LLC 2,472,000$47,240,0000.80%
EcoR1 Capital, LLC 802,507$15,336,0000.53%
Parametrica Management Ltd 36,919$706,0000.53%
Bain Capital Life Sciences Investors, LLC 538,179$7,239,0000.45%
APPLETON GROUP, LLC 19,495$373,0000.32%
MANGROVE PARTNERS IM, LLC 175,587$3,355,0000.30%
Quinn Opportunity Partners LLC 230,100$4,397,0000.28%
PDT Partners, LLC 171,700$3,281,0000.24%
View complete list of BLUEBIRD BIO INC shareholders