X0306 4 2016-03-07 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192779 KANTOR GREGG S 220 NW SECOND AVE PORTLAND OR 97209 1 1 0 0 CEO Common Stock 2016-03-07 4 S 0 4129.5714 50.2397 D 0 I See Footnote Common Stock 45996.8224 D Common Stock 7547.045 I See Footnote Common Stock 200 I See Footnote Common Stock 570 I See Footnote Mr. Kantor determined to diversify his Retirement K Savings Plan (401K) in connection with his announced retirement on December 31, 2016. This transaction reflects the sale of stock held in his retirement account through issuer's 401K. The price reported reflects the amount per share credited to reporting person's 401K account with respect to the shares sold. Shares held in reporting person's account under issuer's 401K as of reporting date. Shares have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives. Shares held in reporting person's parent's account, with respect to which the reporting person is Power of Attorney and a potential beneficiary. Shares held in reporting person's parent's IRA account, with respect to which the reporting person is Power of Attorney and a potential beneficiary. Shawn M. Filippi, Attorney-in-Fact 2016-03-08