ARDSLEY ADVISORY PARTNERS LP - NXSTAGE MEDICAL INC ownership

NXSTAGE MEDICAL INC's ticker is NXTM and the CUSIP is 67072V103. A total of 149 filers reported holding NXSTAGE MEDICAL INC in Q2 2016. The put-call ratio across all filers is 0.08 and the average weighting 0.4%.

Quarter-by-quarter ownership
ARDSLEY ADVISORY PARTNERS LP ownership history of NXSTAGE MEDICAL INC
ValueSharesWeighting
Q1 2016$150,000
-65.0%
10,000
-66.7%
0.02%
-57.4%
Q2 2015$429,000
+200.0%
30,000
+200.0%
0.05%
+74.2%
Q2 2013$143,00010,0000.03%
Other shareholders
NXSTAGE MEDICAL INC shareholders Q2 2016
NameSharesValueWeighting ↓
ORACLE INVESTMENT MANAGEMENT INC 2,721,906$73,029,00011.38%
DAFNA Capital Management LLC 216,119$5,798,0004.90%
DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) 3,744,151$100,456,0003.87%
KOPP INVESTMENT ADVISORS LLC 117,779$3,160,0003.09%
Perceptive Advisors 1,818,189$48,782,0002.78%
Pennant Capital Management, LLC 1,927,408$51,712,0002.45%
GILDER GAGNON HOWE & CO LLC 4,955,630$132,960,0002.24%
PURA VIDA INVESTMENTS, LLC 275,000$7,378,0002.18%
Portolan Capital Management 545,032$14,623,0001.90%
Tamarack Advisers, LP 110,000$2,951,0001.84%
View complete list of NXSTAGE MEDICAL INC shareholders