X0306 4 2020-02-26 0 0001733998 Northwest Natural Holding Co NWN 0001748944 Rogers Melinda B. 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 1 VP, Chief HR & Diversity Off. NW Natural Common Stock 2020-02-26 4 A 0 33 0 A 194.616 D Common Stock 2020-02-26 4 A 0 183 0 A 183 I See Footnote Shares are issuable as a result of satisfaction of the performance threshold for 2019 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date. Shares are issuable as a result of satisfaction of the performance threshold for 2019 under restricted stock unit awards, and credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives pursuant to a prior election. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date. Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives. Shawn M. Filippi, Attorney-in-Fact 2020-02-28