NORTHWEST NAT GAS CO

CUSIP: 667655104 Class: COM

VANGUARD GROUP INC's Holding History (CIK: 0000102909)

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

Q3 2018
Shares 3,063,403 Value ($000) $204,941 Avg Close — Range —
Q2 2018
Shares 3,015,152 Value ($000) $192,368 Avg Close — Range —
Q1 2018
Shares 2,930,835 Value ($000) $168,963 Avg Close — Range —
Q4 2017
Shares 2,880,332 Value ($000) $171,812 Avg Close — Range —
Q3 2017
Shares 2,802,332 Value ($000) $180,471 Avg Close — Range —
Q2 2017
Shares 2,729,991 Value ($000) $163,389 Avg Close — Range —
Q1 2017
Shares 2,703,884 Value ($000) $159,800 Avg Close — Range —
Q4 2016
Shares 2,583,426 Value ($000) $154,490 Avg Close — Range —
Q3 2016
Shares 2,454,918 Value ($000) $147,565 Avg Close — Range —
Q2 2016
Shares 2,385,035 Value ($000) $154,598 Avg Close — Range —
Q1 2016
Shares 2,222,753 Value ($000) $119,695 Avg Close — Range —
Q4 2015
Shares 2,126,593 Value ($000) $107,626 Avg Close — Range —
Q3 2015
Shares 2,078,897 Value ($000) $95,297 Avg Close — Range —
Q2 2015
Shares 2,048,503 Value ($000) $86,406 Avg Close — Range —
Q1 2015
Shares 2,011,055 Value ($000) $96,430 Avg Close — Range —
Q4 2014
Shares 1,933,767 Value ($000) $96,496 Avg Close — Range —
Q3 2014
Shares 1,883,691 Value ($000) $79,586 Avg Close — Range —
Q2 2014
Shares 1,841,272 Value ($000) $86,816 Avg Close — Range —
Q1 2014
Shares 1,803,008 Value ($000) $79,350 Avg Close — Range —
Q4 2013
Shares 1,725,260 Value ($000) $73,876 Avg Close — Range —
Q3 2013
Shares 1,673,855 Value ($000) $70,269 Avg Close — Range —
Q2 2013
Shares 1,631,465 Value ($000) $69,304 Avg Close — Range —