Northwest Natural pany(NWN) - 2023 Q4 - Annual Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 Commission file number 1-38681 Commission file number 1-15973 NORTHWEST NATURAL HOLDING COMPANY NORTHWEST NATURAL GAS COMPANY (Exact name of registrant as specified in its charter) (Exact name of registrant as specified in its charter) Oregon 82-4710680 Oregon 93-0256722 (State or other jurisdictio ...