NXSTAGE MEDICAL INC

CUSIP: 67072V103 Class: COMMON STOCK

NEXT CENTURY GROWTH INVESTORS LLC's Holding History (CIK: 0001134007)

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

Q2 2017
Shares 370,679 Value ($000) $9,292 Avg Close — Range —
Q1 2017
Shares 545,480 Value ($000) $14,635 Avg Close — Range —
Q4 2016
Shares 565,814 Value ($000) $14,829 Avg Close — Range —
Q1 2015
Shares 784,047 Value ($000) $13,564 Avg Close — Range —
Q4 2014
Shares 428,873 Value ($000) $7,689 Avg Close — Range —