NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q3 2018
Shares 232,541 Value ($000) $15,557 Avg Close — Range —
Q2 2018
Shares 224,245 Value ($000) $14,307 Avg Close — Range —
Q1 2018
Shares 235,679 Value ($000) $13,587 Avg Close — Range —
Q4 2017
Shares 228,274 Value ($000) $13,617 Avg Close — Range —
Q3 2017
Shares 221,153 Value ($000) $14,242 Avg Close — Range —
Q2 2017
Shares 221,409 Value ($000) $13,252 Avg Close — Range —
Q1 2017
Shares 227,523 Value ($000) $13,447 Avg Close — Range —
Q4 2016
Shares 225,643 Value ($000) $13,493 Avg Close — Range —
Q3 2016
Shares 211,097 Value ($000) $12,689 Avg Close — Range —
Q2 2016
Shares 200,021 Value ($000) $12,965 Avg Close — Range —
Q1 2016
Shares 191,849 Value ($000) $10,331 Avg Close — Range —
Q4 2015
Shares 186,840 Value ($000) $9,456 Avg Close — Range —
Q3 2015
Shares 172,249 Value ($000) $7,896 Avg Close — Range —
Q2 2015
Shares 166,500 Value ($000) $7,023 Avg Close — Range —
Q1 2015
Shares 173,566 Value ($000) $8,322 Avg Close — Range —
Q4 2014
Shares 164,795 Value ($000) $8,223 Avg Close — Range —
Q3 2014
Shares 170,576 Value ($000) $7,207 Avg Close — Range —
Q2 2014
Shares 170,409 Value ($000) $8,035 Avg Close — Range —
Q1 2014
Shares 170,585 Value ($000) $7,507 Avg Close — Range —
Q4 2013
Shares 164,016 Value ($000) $7,023 Avg Close — Range —
Q3 2013
Shares 154,139 Value ($000) $6,471 Avg Close — Range —
Q2 2013
Shares 149,234 Value ($000) $6,340 Avg Close — Range —