X0306 4 2014-02-26 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001571275 WILSON BRODY J 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 Controller Common Stock 2014-02-26 4 A 0 566 0 A 566 D Common Stock 41.8555 I See Footnote Shares are issuable as a result of satisfaction of the performance threshold for 2013 under a restricted stock unit award. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date. Shares held in the reporting person's account under Northwest Natural Gas Company's Retirement K Savings Plan as of January 31, 2014. Shawn M. Filippi, Attorney-in-Fact 2014-02-28