NXSTAGE MEDICAL INC

CUSIP: 67072V103 Class: COMMON STOCK

Employees Retirement System of Texas's Holding History (CIK: 0001398739)

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

Q2 2018
Shares 43,000 Value ($000) $1,200 Avg Close — Range —
Q1 2018
Shares 43,000 Value ($000) $1,069 Avg Close — Range —
Q4 2017
Shares 43,000 Value ($000) $1,042 Avg Close — Range —
Q3 2017
Shares 43,000 Value ($000) $1,187 Avg Close — Range —
Q2 2017
Shares 43,000 Value ($000) $1,078 Avg Close — Range —
Q1 2017
Shares 43,000 Value ($000) $1,154 Avg Close — Range —
Q4 2016
Shares 43,000 Value ($000) $1,127 Avg Close — Range —
Q3 2016
Shares 122,000 Value ($000) $3,049 Avg Close — Range —
Q2 2016
Shares 198,000 Value ($000) $4,293 Avg Close — Range —
Q1 2016
Shares 198,000 Value ($000) $2,968 Avg Close — Range —
Q4 2015
Shares 198,000 Value ($000) $4,338 Avg Close — Range —
Q3 2015
Shares 198,000 Value ($000) $3,122 Avg Close — Range —
Q2 2015
Shares 198,000 Value ($000) $2,828 Avg Close — Range —
Q1 2015
Shares 198,000 Value ($000) $3,425 Avg Close — Range —
Q4 2014
Shares 198,000 Value ($000) $3,550 Avg Close — Range —
Q3 2014
Shares 198,000 Value ($000) $2,600 Avg Close — Range —
Q2 2014
Shares 198,000 Value ($000) $2,845 Avg Close — Range —
Q1 2014
Shares 198,000 Value ($000) $2,523 Avg Close — Range —
Q4 2013
Shares 198,000 Value ($000) $1,980 Avg Close — Range —
Q3 2013
Shares 198,000 Value ($000) $2,606 Avg Close — Range —
Q2 2013
Shares 161,000 Value ($000) $2,299 Avg Close — Range —