NXSTAGE MEDICAL INC

CUSIP: 67072V103 Class: COMMON STOCK

PURA VIDA INVESTMENTS, LLC's Holding History (CIK: 0001590144)

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

Q2 2017
Shares 221,685 Value ($000) $5,558 Avg Close — Range —
Q1 2017
Shares 275,000 Value ($000) $7,378 Avg Close — Range —
Q4 2016
Shares 257,500 Value ($000) $6,749 Avg Close — Range —
Q3 2016
Shares 365,000 Value ($000) $9,121 Avg Close — Range —
Q2 2016
Shares 200,000 Value ($000) $4,336 Avg Close — Range —
Q1 2016
Shares 240,157 Value ($000) $3,600 Avg Close — Range —
Q4 2015
Shares 210,000 Value ($000) $4,601 Avg Close — Range —
Q3 2015
Shares 310,000 Value ($000) $4,889 Avg Close — Range —
Q2 2015
Shares 260,200 Value ($000) $3,716 Avg Close — Range —
Q1 2015
Shares 104,116 Value ($000) $1,801 Avg Close — Range —
Q4 2014
Shares 120,000 Value ($000) $2,152 Avg Close — Range —