X0508 4 2026-02-25 0001733998 Northwest Natural Holding Co NWN 0002058274 Berge Megan H 250 SW TAYLOR STREET PORTLAND OR 97204 false true false false SVP, GC, CCO & Corp. Sec. false Common Stock 2026-02-25 4 A false 1029.0000 0.00 A 7326.0000 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. Includes 6,297 time-based restricted stock units granted under the Long Term Incentive Plan of Issuer. The restricted stock units vest in three equal installments on each of March 1, 2026, 2027 and 2028. Molly J. Wilcox, Attorney-in-Fact 2026-02-27