NXSTAGE MEDICAL INC

CUSIP: 67072V103 Class: COMMON STOCK

STATE OF WISCONSIN INVESTMENT BOARD's Holding History (CIK: 0000854157)

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

Q4 2018
Shares 214,381 Value ($000) $6,136 Avg Close — Range —
Q3 2018
Shares 709,400 Value ($000) $19,785 Avg Close — Range —
Q2 2018
Shares 922,974 Value ($000) $25,751 Avg Close — Range —
Q1 2018
Shares 1,103,947 Value ($000) $27,444 Avg Close — Range —
Q4 2017
Shares 1,056,447 Value ($000) $25,598 Avg Close — Range —
Q3 2017
Shares 485,600 Value ($000) $13,403 Avg Close — Range —
Q3 2014
Shares 163,220 Value ($000) $2,143 Avg Close — Range —
Q2 2014
Shares 163,220 Value ($000) $2,345 Avg Close — Range —
Q1 2014
Shares 163,220 Value ($000) $2,079 Avg Close — Range —
Q4 2013
Shares 253,220 Value ($000) $2,532 Avg Close — Range —
Q3 2013
Shares 253,220 Value ($000) $3,332 Avg Close — Range —
Q2 2013
Shares 253,220 Value ($000) $3,616 Avg Close — Range —