GROUP ONE TRADING, L.P. - CUBIST PHARMACEUTICALS INC ownership

CUBIST PHARMACEUTICALS INC's ticker is CBST and the CUSIP is 229678107. A total of 316 filers reported holding CUBIST PHARMACEUTICALS INC in Q4 2014. The put-call ratio across all filers is 2.12 and the average weighting 0.7%.

Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of CUBIST PHARMACEUTICALS INC
ValueSharesWeighting
Q4 2014$5,386,000
+5569.5%
53,512
+3837.6%
0.08%
+8000.0%
Q2 2014$95,0001,3590.00%
Other shareholders
CUBIST PHARMACEUTICALS INC shareholders Q4 2014
NameSharesValueWeighting ↓
Palo Alto Investors LP 1,336,136$92,020,0008.58%
Cormorant Asset Management, LP 400,000$27,548,0008.00%
HealthCor Management, L.P. 1,400,000$96,418,0005.86%
DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) 1,000,000$68,870,0003.57%
SECTOR GAMMA AS 176,090$12,127,0003.27%
EAGLE BOSTON INVESTMENT MANAGEMENT INC 698,376$48,097,0002.33%
Ghost Tree Capital, LLC 50,000$3,444,0002.12%
Duquesne Family Office 413,000$28,443,0001.90%
Rail-Splitter Capital Management, LLC 78,900$5,434,0001.88%
MAZAMA CAPITAL MANAGEMENT INC 50,891$3,505,0001.74%
View complete list of CUBIST PHARMACEUTICALS INC shareholders