X0508 4 2026-03-05 0001733998 Northwest Natural Holding Co NWN 0001241405 ANDERSON DAVID HUGO 250 SW TAYLOR ST PORTLAND OR 97204 true false false false false Common Stock 2026-03-05 4 F false 3747 52.53 D 61103 D Common Stock 2026-03-05 4 F false 5844 52.53 D 55259 D Common Stock 8886.7730 I See Footnote Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 27, 2026. Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 27, 2026. Shares have been credited to the reporting persons account under the Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives. Molly J. Wilcox, Attorney-in-Fact 2026-03-09