NXSTAGE MEDICAL INC

CUSIP: 67072V103 Class: COMMON STOCK

PERCEPTIVE ADVISORS LLC's Holding History (CIK: 0001224962)

Note: Option positions (PUT/CALL) are excluded.

Q3 2017
Shares 1,264,523 Value ($000) $34,901 Avg Close — Range —
Q2 2017
Shares 1,555,523 Value ($000) $38,997 Avg Close — Range —
Q1 2017
Shares 1,818,189 Value ($000) $48,782 Avg Close — Range —
Q4 2016
Shares 1,927,989 Value ($000) $50,533 Avg Close — Range —
Q3 2016
Shares 1,669,703 Value ($000) $41,726 Avg Close — Range —
Q2 2016
Shares 1,382,410 Value ($000) $29,971 Avg Close — Range —
Q3 2014
Shares 20,000 Value ($000) $263 Avg Close — Range —