NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

FIRST INTERSTATE BANK's Holding History (CIK: 0001125727)

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

Q3 2018
Shares 2,000 Value ($000) $134 Avg Close — Range —
Q2 2018
Shares 2,000 Value ($000) $128 Avg Close — Range —
Q1 2018
Shares 2,000 Value ($000) $115 Avg Close — Range —
Q4 2017
Shares 2,000 Value ($000) $119 Avg Close — Range —
Q3 2017
Shares 2,000 Value ($000) $129 Avg Close — Range —
Q2 2017
Shares 2,000 Value ($000) $120 Avg Close — Range —
Q1 2017
Shares 2,000 Value ($000) $118 Avg Close — Range —
Q4 2016
Shares 2,000 Value ($000) $120 Avg Close — Range —
Q3 2016
Shares 2,000 Value ($000) $120 Avg Close — Range —
Q2 2016
Shares 2,000 Value ($000) $130 Avg Close — Range —
Q1 2016
Shares 2,000 Value ($000) $108 Avg Close — Range —
Q4 2015
Shares 2,000 Value ($000) $101 Avg Close — Range —
Q3 2015
Shares 2,000 Value ($000) $92 Avg Close — Range —