NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO's Holding History (CIK: 0000315297)

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

Q3 2018
Shares 4,465 Value ($000) $299 Avg Close — Range —
Q2 2018
Shares 4,465 Value ($000) $285 Avg Close — Range —
Q1 2018
Shares 4,465 Value ($000) $257 Avg Close — Range —
Q4 2017
Shares 4,465 Value ($000) $266 Avg Close — Range —
Q3 2017
Shares 4,465 Value ($000) $288 Avg Close — Range —
Q2 2017
Shares 4,779 Value ($000) $286 Avg Close — Range —
Q1 2017
Shares 4,779 Value ($000) $282 Avg Close — Range —
Q4 2016
Shares 4,779 Value ($000) $286 Avg Close — Range —
Q3 2016
Shares 4,779 Value ($000) $287 Avg Close — Range —
Q2 2016
Shares 4,779 Value ($000) $310 Avg Close — Range —
Q1 2016
Shares 5,788 Value ($000) $312 Avg Close — Range —
Q4 2015
Shares 3,858 Value ($000) $195 Avg Close — Range —
Q3 2015
Shares 3,858 Value ($000) $177 Avg Close — Range —
Q2 2015
Shares 3,858 Value ($000) $163 Avg Close — Range —
Q1 2015
Shares 3,858 Value ($000) $185 Avg Close — Range —
Q4 2014
Shares 3,858 Value ($000) $193 Avg Close — Range —
Q3 2014
Shares 3,858 Value ($000) $163 Avg Close — Range —
Q2 2014
Shares 3,858 Value ($000) $182 Avg Close — Range —
Q1 2014
Shares 3,858 Value ($000) $170 Avg Close — Range —
Q4 2013
Shares 3,858 Value ($000) $165 Avg Close — Range —
Q3 2013
Shares 3,858 Value ($000) $162 Avg Close — Range —
Q2 2013
Shares 3,858 Value ($000) $164 Avg Close — Range —