X0306 4 2020-02-26 0 0001733998 Northwest Natural Holding Co NWN 0001686243 Palfreyman Justin 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 1 VP, Strategy & Bus Dev NW Natural Common Stock 2020-02-26 4 A 0 745 0 A 3632 D Common Stock 2020-02-26 4 A 0 2901 0 A 6533 D 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 performance goals for 2017-2019 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date. Includes 1,548 time-based restricted stock units (RSUs) granted under issuer's Long Term Incentive Plan. The RSUs vest in two installments: 516 shares on March 1, 2020, and 1,032 shares on March 1, 2021. Shawn M. Filippi, Attorney-in-Fact 2020-02-28