X0206 3 2015-06-30 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001647110 Hazelton Gregory C 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 SVP & CFO Common Stock 7580 D Common stock pursuant to restricted stock units (RSUs) that were granted under Northwest Natural Gas Company's Long Term Incentive Plan. The RSUs vest in four equal installments of shares on each March 1, 2016, 2017, 2018 and 2019. Shawn M. Filippi, Attorney-in-Fact 2015-07-09