X0306 4 2020-02-26 0 0001733998 Northwest Natural Holding Co NWN 0001445672 Saathoff MardiLyn 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 SVP, General Counsel & Reg. Common Stock 2020-02-26 4 A 0 1436 0 A 11079.1235 D Common Stock 2020-02-26 4 A 0 361 0 A 7628.162 I See Footnote Common Stock 2020-02-26 4 A 0 3993 0 A 15072.1235 D Common Stock 2020-02-26 4 A 0 545 0 A 8173.162 I See Footnote Common Stock 1299.899 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. Includes 2,325 time-based restricted stock units (RSUs) granted under issuer's Long Term Incentive Plan. The RSUs vest in two installments: 775 shares on March 1, 2020, and 1,550 shares on March 1, 2021. 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. 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 transaction date. Shares are issuable as a result of satisfaction of performance goals for 2017-2019 under a performance share award, and credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives pursuant to a prior election. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date. Shares held in reporting person's account under Northwest Natural Gas Company's Retirement K Savings Plan as of January 31, 2020. Shawn M. Filippi, Attorney-in-Fact 2020-02-28