NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

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

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

Q3 2018
Shares 11,000 Value ($000) $736 Avg Close — Range —
Q2 2018
Shares 11,000 Value ($000) $702 Avg Close — Range —
Q1 2018
Shares 11,000 Value ($000) $634 Avg Close — Range —
Q4 2017
Shares 11,000 Value ($000) $656 Avg Close — Range —
Q3 2017
Shares 11,000 Value ($000) $708 Avg Close — Range —
Q2 2017
Shares 11,000 Value ($000) $658 Avg Close — Range —
Q1 2017
Shares 15,000 Value ($000) $887 Avg Close — Range —
Q4 2016
Shares 15,000 Value ($000) $897 Avg Close — Range —