NWN

EX-99.1

2 a2026q1ex991pressreleasedo.htm

EX-99.1

Document

Exhibit 99.1

For Immediate Release

May 6, 2026

NW Natural Holdings Reports Strong First Quarter 2026 Results

PORTLAND, ORE. — Northwest Natural Holding Company (NYSE: NWN) (NW Natural Holdings or the Company) reported financial results and highlights including:

First Quarter 2026 Highlights

•Reported earnings per share (EPS) of $2.33 for the first quarter of 2026, compared to EPS of $2.18 and adjusted EPS1 of $2.28 for the same period in 2025

•Added over 26,000 gas and water utility connections over the 12 months ended March 31, 2026 for a growth rate of 2.8%, driven by both acquisitions and organic customer growth of 1.8%

•Invested $114 million in our gas and water systems to support greater reliability and resiliency

2026 Guidance and Long-term Growth Targets Reaffirmed

•2026 EPS guidance of $2.95 – $3.15

•Expect rate base growth of 6% – 8% through 2030 driven by planned cap-ex of $2.6 – $2.9 billion from 2026 – 2030

•Long-term EPS growth rate target of 4% – 6%2 and potential to increase to 5% – 7%2 with MX3 gas storage project

“I'm pleased with our strong first‑quarter results, which put us on solid footing for the year," said Justin Palfreyman, President and CEO of NW Natural Holding Company. "These results reflect our continued focus on building a consistent track record of disciplined execution. We made progress on our key regulatory initiatives and delivered solid operational performance, efficient capital investment, and healthy customer growth across all three of our regulated utility businesses. Additionally, our MX3 gas storage expansion project is on track and continues to build momentum. We remain confident in our strategy and our ability to deliver long‑term value to stakeholders.”

FIRST QUARTER RESULTS

NW Natural Holdings' first quarter results are summarized below:

Three Months Ended March 31,

In thousands, except per share data20262025Change

Net income$97,489 $87,916 $9,573

EPS2.33 2.18 0.15

Adjusted net income1 97,489 91,802 5,687

Adjusted EPS1 2.33 2.28 0.05

1 See "Non-GAAP Financial Measures"and "Reconciliation to GAAP" for a definition and further information on adjusted net income and adjusted EPS. Adjusted Q1 2025 net income and adjusted EPS exclude transaction and business development costs including the effects of the SiEnergy transaction.

2 EPS growth forecasted for period 2026 – 2030 compounded annually; EPS growth rate uses adjusted 2025 EPS as base year. Long-term growth rate target with MX3 assumes in-service date prior to the end of 2029. NW Natural Holdings does not provide a reconciliation of the adjusted EPS growth rate target to the most directly comparable GAAP measures due to the inherent difficulty in forecasting and quantifying certain significant items.

1

KEY EVENTS

Reached Settlement in NW Natural's Washington General Rate Case

On March, 23, 2026, NW Natural Gas Company (NW Natural) filed a multi-party settlement with the Washington Utilities and Transportation Commission (WUTC) that addresses all the revenue requirement items in the multi-year general rate case. The settlement provides increases to the annual revenue requirement over three years, consisting of a $20.1 million revenue increase in the first year beginning Aug. 1, 2026, a $7.7 million revenue increase in the second year, and an $8.7 million revenue increase in the third year. The settlement includes a capital structure of 50% common equity and 50% long-term debt, a return on equity of 9.5%, and an overall cost of capital of 7.15% beginning in the first year and growing to 7.22% in the third year. Rate base is $328.0 million in the first year, or an increase of $80.7 million since the last rate case. The settlement is subject to the review and approval of the WUTC. New rates are expected to be effective Aug. 1, 2026.

SiEnergy Filed a General Rate Case

On May 4, 2026, SiEnergy filed a general rate case with the Texas Railroad Commission (RRC). The filing requests the consolidation of SiEnergy and the Pines gas entities, a $12.0 million revenue increase, a capital structure of 60% common equity and 40% long-term debt, an 8.73% cost of capital, and a 10.75% return on equity. The filing includes rate base of $343.1 million or an increase of $176.9 million since the last rate case. SiEnergy is requesting the factors necessary to file for interim rate adjustments under the Gas Reliability Infrastructure Program (GRIP). New rates are expected to be effective in the fourth quarter of 2026.

Continued Progress on MX3 Storage Expansion Project

NW Natural continues to make progress on the 4 – 5 Bcf expansion of its Mist gas storage facility, including receiving the necessary permits and working on Engineering, Procurement and Construction (EPC) contracts. These new storage services will be regulated by FERC. Customers have agreed to a fixed 12.5% return on equity, and a capital structure of 50% equity and 50% long-term debt.

nwn-2026022700017339980000073020falsefalse00017339982026-02-272026-02-270001733998nwn:NorthwestNaturalGasCompanyMember2026-02-272026-02-27

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

February 27, 2026 Date of Report (Date of earliest event reported)

NORTHWEST NATURAL HOLDING COMPANYNORTHWEST NATURAL GAS COMPANY

(Exact name of registrant as specified in its charter) (Exact name of registrant as specified in its charter) Commission file number 1-38681 Commission file number1-15973 Oregon82-4710680Oregon93-0256722 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

250 S.W. Taylor Street250 S.W. Taylor Street Portland,Oregon97204 Portland,Oregon97204 (Address of principal executive offices)  (Zip Code)(Address of principal executive offices)  (Zip Code)

Registrant’s telephone number, including area code:(503)226-4211Registrant’s telephone number, including area code:(503)226-4211

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: RegistrantTitle of each classTrading SymbolName of each exchange on which registered

Northwest Natural Holding CompanyCommon StockNWNNew York Stock Exchange Northwest Natural Gas CompanyNone

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Northwest Natural Holding CompanyEmerging growth company☐ Northwest Natural Gas CompanyEmerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operation and Financial Condition

On February 27, 2026, Northwest Natural Holding Company (NW Holdings) issued a press release announcing its earnings for the quarter and year ended December 31, 2025. A copy of the press release is attached as Exhibit 99.1.

The information contained in this Item 2.02 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 amended, or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended.

Forward-Looking Statements

This press release, and other presentations made by NW Holdings from time to time, may contain forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements can be identified by words such as "anticipates," "assumes," “continues,” “could,” "intends," "plans," "seeks," "believes," "estimates," "expects," "forecasts," "will" and similar references to future periods. Examples of forward-looking statements include, but are not limited to, statements regarding the following: plans, objectives, assumptions, estimates, expectations, forecasts, outlooks, timing, goals, strategies, commitments, future events, financial positions, financial performance, investments, valuations, timing and amount of capital expenditures, targeted capital structure, risks, risk profile, stability, acquisitions and timing, approval, completion and integration thereof, the likelihood and success associated with any transaction, strategic fit, utility system, technology and infrastructure investments, expected timing of notice to proceed, the initiation of construction, expected in service date and capital expenditure requirements for MX3, system modernization, reliability and resiliency, global, national and local economies, economic and GDP growth, customer and business growth, continued expansion of service territories,

nwn-2025110500017339980000073020falsefalse0001733998nwn:NorthwestNaturalGasCompanyMember2025-11-052025-11-0500017339982025-11-052025-11-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

November 5, 2025 Date of Report (Date of earliest event reported)

NORTHWEST NATURAL HOLDING COMPANYNORTHWEST NATURAL GAS COMPANY

(Exact name of registrant as specified in its charter) (Exact name of registrant as specified in its charter) Commission file number 1-38681 Commission file number 1-15973 Oregon82-4710680Oregon93-0256722 (State or other jurisdiction of incorporation)(I.R.S. Employer Identification No.)(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

250 SW Taylor Street250 SW Taylor Street Portland,Oregon97204 Portland,Oregon97204 (Address of principal executive offices)  (Zip Code)(Address of principal executive offices)  (Zip Code)

Registrant’s telephone number, including area code:(503)226-4211Registrant’s telephone number, including area code:(503)226-4211

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: RegistrantTitle of each classTrading SymbolName of each exchange on which registered

Northwest Natural Holding CompanyCommon StockNWNNew York Stock Exchange Northwest Natural Gas CompanyNone

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Northwest Natural Holding CompanyEmerging growth company☐ Northwest Natural Gas CompanyEmerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operation and Financial Condition

On November 5, 2025, Northwest Natural Holding Company (NW Holdings) issued a press release announcing its earnings for the quarter ended September 30, 2025. A copy of the press release is attached as Exhibit 99.1.

The information contained in this Item 2.02 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 amended, or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended.

Forward-Looking Statements

This press release, and other presentations made by NW Holdings from time to time, may contain forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements can be identified by words such as "anticipates," "assumes," “continues,” “could,” "intends," "plans," "seeks," "believes," "estimates," "expects," "forecasts," "will" and similar references to future periods. Examples of forward-looking statements include, but are not limited to, statements regarding the following: plans, objectives, assumptions, estimates, expectations, forecasts, outlooks, timing, goals, strategies, commitments, future events, financial positions, financial performance, investments, valuations, timing and amount of capital expenditures, targeted capital structure, risks, risk profile, stability, acquisitions and timing, approval, completion and integration thereof, the likelihood and success associated with any transaction, strategic fit, utility system, technology and infrastructure investments, system modernization, reliability and resiliency, global, national and local economies, economic and GDP growth, customer and business growth, continued expansion of service territories, rate base growth, customer backlog, growth opportunities, customer satisfaction ratings, weather, performance and service during weather events, customer rates or rate r