X0508 4 2024-02-21 0001733998 Northwest Natural Holding Co NWN 0001940844 Kravitz Zachary D 250 SW TAYLOR ST PORTLAND OR 97204 true true VP, Rates & Regulatory NW Natural false Common Stock 2024-02-21 4 A 0 255 0 A 1633.4963 D Common Stock 302.485 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. Includes 268 time-based RSUs granted under issuer's Long Term Incentive Plan. The RSUs vest in three installments: 104 shares on each of March 1, 2024 and 2025 and 60 shares on March 1, 2026. Shares are held in reporting person's account under Northwest Natural Gas Company's Retirement K Savings Plan as of January 31, 2024. Shawn M. Filippi, Attorney-in-Fact 2024-02-23