X0306 4 2014-02-26 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001457484 Miller C. Alex 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 VP & Treasurer Common Stock 2014-02-26 4 A 0 323 0 A 1878.3549 D Common Stock 2014-02-26 4 A 0 375 0 A 2253.3549 D Common Stock 1611.0883 I See Footnote Shares are issuable as a result of satisfaction of performance goals for 2011-2013 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date. Shares are issuable as a result of satisfaction of the performance threshold for 2013 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date. Shares held in 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