X0206 3 2016-02-25 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001668229 Murandu Ngoni 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 VP & CIO Common Stock 858 D Common Stock 34.442 I See Footnote 660 of the total common stock are of restricted stock units (RSUs) that were granted under Northwest Natural Gas Company's Long Term Incentive Plan. The RSUs vest in two equal installments on each March 31, 2016 and 2017. Shares held in the reporting person's account under issuer's Retirement K Savings Plan. Shawn M. Filippi, Attorney-in-Fact 2016-03-01