NXSTAGE MEDICAL INC

CUSIP: 67072V103 Class: COMMON STOCK

Portolan Capital Management, LLC's Holding History (CIK: 0001350290)

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

Q2 2017
Shares 492,188 Value ($000) $12,339 Avg Close — Range —
Q1 2017
Shares 545,032 Value ($000) $14,623 Avg Close — Range —
Q4 2016
Shares 576,263 Value ($000) $15,104 Avg Close — Range —
Q3 2016
Shares 532,242 Value ($000) $13,301 Avg Close — Range —
Q2 2016
Shares 215,810 Value ($000) $4,679 Avg Close — Range —