Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. On September 3, 2026, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company, issued and sold (i) $60,000,000 aggregate principal amount of its First Mortgage Bonds, 5.62% Series due 2036 (the 5.62% Bonds), and (ii) $60,000,000 aggregate principal amount of its First Mortgage Bonds, 6.26% Series due 2056 (the 6.26% Bonds), to ce…

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or Northwest Natural Gas Company (NW Natural), whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 2.02, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amende…

Other Events As previously disclosed, on August 29, 2025, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company (NW Holdings), filed a request for a general rate increase (Rate Case) with the Washington Utilities and Transportation Commission (WUTC) under Washington's multi-year rate plan statute. Also as previously disclosed, on March 23, 2026, NW Natural, Staff of the WUTC, The Energy Project, and the Alliance of Western Energy Consumers,…

Other Events. On June 4, 2026, NW Natural Water Company, LLC (“NW Natural Water”), an Oregon limited liability company and a subsidiary of NW Holdings, issued and sold (i) $33,000,000 in aggregate principal amount of its 5.15% Senior Notes, Series A, due June 4, 2031 (the “Series A Notes”) and (ii) $42,000,000 in aggregate principal amount of its 5.58% Senior Notes, Series B, due June 4, 2036 (the “Series B Notes,” and, together with the Series A Notes, the “NW Natural Water Notes”), to certa…

Creation of Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth above and referenced under

Entry Into a Material Definitive Agreement. On June 4, 2026, Northwest Natural Holding Company (“NW Holdings”) (i) issued and sold $50,000,000 in aggregate principal amount of its 5.35% Senior Notes, Series E, due June 4, 2031 (the “Series E Notes”), (ii) agreed to issue and sell $10,000,000 in aggregate principal amount of its 5.35% Senior Notes, Series F, due August 5, 2031 (the “Series F Notes”) and (iii) agreed to issue and sell $60,000,000 in aggregate principal amount of its 5.83% Senio…

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or Northwest Natural Gas Company (NW Natural), whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 2.02, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amende…

Other Events As previously disclosed, on August 29, 2025, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company (NW Holdings), filed a request for a general rate increase (Rate Case) with the Washington Utilities and Transportation Commission (WUTC) under Washington's multi-year rate plan statute. Approximately 99,000 or 12% of NW Natural’s customers are in, and approximately 8% of NW Natural’s revenues are derived from, Washington. The rem…

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or Northwest Natural Gas Company (NW Natural), whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 2.02, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amende…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of Registrant. On December 16, 2025, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company, issued and sold (i) $75,000,000 aggregate principal amount of its First Mortgage Bonds, 5.13% Series due 2036 (the 5.13% Bonds), and (ii) $125,000,000 aggregate principal amount of its First Mortgage Bonds, 5.90% Series due 2055 (the 5.90% Bonds, togethe…

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or NW Natural, whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 7.01, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the l…

General Counsel — MardiLyn Saathoff: The General Counsel is retiring with a named internal successor (Megan H. Berge) appointed to ensure continuity, representing an orderly succession rather than a sudden loss of leadership.

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or Northwest Natural Gas Company (NW Natural), whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 2.02, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amende…

Other Events As previously disclosed, on December 30, 2024, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company (NW Holdings), filed a request for a general rate case (Rate Case) with the Public Utility Commission of Oregon (OPUC). The filing requested a $59.4 million annual revenue requirement increase, which included $10 million related to an updated depreciation study. As further disclosed, on June 23, 2025 NW Natural, the OPUC staff,…

Other Events On August 29, 2025, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company (NW Holdings), filed a request for a general rate increase with the Washington Utilities and Transportation Commission (WUTC) under Washington's multi-year rate plan statute. Approximately 98,000 or 12% of NW Natural’s customers are in, and approximately 10% of NW Natural’s revenues are derived from, Washington. The remainder of NW Natural's customers and…

Other Events On August 25, 2025, SiEnergy Gas, LLC (“SiEnergy”), a Texas limited liability company and an indirect subsidiary of Northwest Natural Holding Company (“NW Holdings”), issued and sold (i) $50,000,000 in aggregate principal amount of its 4.86% Senior Notes, Series A, due August 25, 2030 (the “Series A Notes”), (ii) $40,000,000 in aggregate principal amount of its 5.42% Senior Notes, Series B, due August 25, 2035 (the “Series B Notes”), and (iii) $95,000,000 in aggregate principal a…

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or Northwest Natural Gas Company (NW Natural), whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 2.02, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amende…

and in the accompanying exhibit shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 7.01, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of…

Director — Peter J. Bragdon: The filing discloses the appointment of a new independent director to the board, which is a routine governance event and not a departure of a senior executive.

Other Events As previously disclosed, on December 30, 2024, Northwest Natural Gas Company (NW Natural), a wholly owned subsidiary of Northwest Natural Holding Company (NW Holdings), filed a request for a general rate case (Rate Case) with the Public Utility Commission of Oregon (OPUC). The filing requested a $59.4 million annual revenue requirement increase. On June 23, 2025, NW Natural, the OPUC staff, the Oregon Citizens’ Utility Board (CUB) and the Alliance of Western Energy Consumers (AWE…

Director — Timothy P. Boyle: The filing reports the routine retirement of three directors in accordance with bylaws and a term expiration, accompanied by a standard board size reduction and an unrelated incentive plan amendment.

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or Northwest Natural Gas Company (NW Natural), whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 2.02, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amende…

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or NW Natural, whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 7.01, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the l…

Other Events. On March 12, 2025, Northwest Natural Holding Company (Company) entered into an Underwriting Agreement for the sale of $325,000,000 in aggregate principal amount of the Company’s Junior Subordinated Debentures due September 15, 2055 (Junior Subordinated Debentures). The Company will pay interest on the Junior Subordinated Debentures (i) from and including the date of original issuance to, but not including, September 15, 2035, at an annual rate of 7.0% and (ii) from and including…

and in the accompanying exhibit shall not be incorporated by reference into any filing of NW Holdings or Northwest Natural Gas Company (NW Natural), whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this Item 7.01, including the exhibit hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amende…