X0508 4 2026-02-25 0001733998 Northwest Natural Holding Co NWN 0001772924 Williams Kathryn M 250 SW TAYLOR ST PORTLAND OR 97204 false true false true VP, Chief PA & Sustainability NW Natural false Common Stock 2026-02-25 4 A false 1177.0000 0.00 A 6531.0000 D Common Stock 2026-02-25 4 A false 1962.0000 0.00 A 8493.0000 D Shares are issuable as a result of satisfaction of the performance threshold for 2025 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 2023-2025 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date. Molly J. Wilcox, Attorney-in-Fact 2026-02-27