X0508 4 2024-02-21 0001733998 Northwest Natural Holding Co NWN 0001241405 ANDERSON DAVID HUGO 250 SW TAYLOR STREET PORTLAND OR 97204 true true CEO false Common Stock 2024-02-21 4 A 0 9263 0 A 146925 D Common Stock 2024-02-21 4 A 0 13929 0 A 160854 D Common Stock 11066.919 I See Footnote Shares are issuable as a result of satisfaction of the performance threshold for 2023 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 2021-2023 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date. Shares have been credited to the reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives. Shawn M. Filippi, Attorney-in-Fact 2024-02-23