Northwest Natural Holding Company, (NYSE: NWN) (NW Natural Holdings), reported financial results and highlights including:

• Reported net income of $63.8 million ($1.69 per share) for the first quarter of 2024, compared to net income of $71.7 million ($2.01 per share) for the same period in 2023
• Added nearly 15,000 gas and water utility connections in the last 12 months for a growth rate of 1.7% as of March 31, 2024 mainly driven by strong water acquisitions
• Oregon gas customers received bill credits totaling nearly $30 million in early 2024. Over the last 20 years, we've credited NW Natural customers' bills with cumulative savings of over $250 million due to our Mist storage assets and pipeline capacity management
• Customers and the region relied on the gas system during the winter storm in January with a total of 9.0 million therms delivered on Jan. 13, 2024, including 8.0 million therms provided to homes and businesses achieving a new peak day record, and setting a new withdrawal record from our on-system gas storage facility in Mist, Oregon
• For the third year in a row, honored as one of the World's Most Ethical Companies® by Ethisphere¹
• Reaffirmed 2024 earnings guidance in the range of $2.20 to $2.40 per share and long-term earnings per share growth rate target of 4% to 6% from 2022 through 2027. 2022 earnings per share were $2.54

"Our continued success is due to our employees. They kept the gas flowing in January during an extended winter weather event that affected our entire region," said David H. Anderson, CEO of NW Natural Holdings. "Our system performed well, and we provided safe and reliable energy to our region and customers when they needed it most. Delivering essential energy on the coldest winter days is the result of disciplined planning and investments in the system. Safe and reliable energy delivery is our highest commitment to our customers, and we take it very seriously."

"I'm also proud that NW Natural Holdings was named one of the 2024 World's Most Ethical Companies® by Ethisphere for the third year running," continued Anderson. "This designation reflects our long-standing commitment to leadership in business integrity through best-in-class ethics, compliance and governance practices. We remain on track to meet our business objectives and financial goals this year, and we're working to capture growth opportunities that add long-term value."

Net income decreased $7.8 million to $63.8 million (or $1.69 per share) for the first three months of 2024, compared to $71.7 million (or $2.01 per share) for the same period in 2023. Results reflected higher pension expense, depreciation from continued investment in our system, and interest expense for our natural gas utility.

¹ “World’s Most Ethical Companies” and “Ethisphere” names and marks are registered trademarks of Ethisphere LLC

FIRST QUARTER RESULTS

We primarily operate through our natural gas distribution segment, which is a regulated utility and principally engaged in the delivery of natural gas to customers in Oregon and southwest Washington. The segment also includes the portion of the Mist underground storage facility used to serve gas utility customers, the North Mist gas storage expansion, and RNG development and procurement for the utility.

Other business activities are reported through "Other" results and primarily include Interstate Storage Services and third-party asset management services for the Mist facility in Oregon; NW Natural Water, which holds our water and wastewater

utility operations; and NW Natural Renewables, which is a competitive renewable fuels business.

The following financial comparisons are between the first quarter results for 2024 and 2023. NW Natural Holdings' annual results by business segment are summarized in the table below:

Natural Gas Distribution Segment

Natural Gas Distribution segment net income decreased $6.2 million (or $0.28 per share) reflecting higher operating expenses.

Margin increased $0.5 million primarily due to the amortization of deferrals and customer growth which among other miscellaneous items contributed $5.5 million. Partially offsetting these items was a $3.5 million reduction in margin due to warmer comparative weather and the effect on customers not covered by the weather normalization mechanism. Weather was 9% warmer than average in the first quarter of 2024, compared to 5% colder than average weather in the first quarter of 2023. In addition, there was a $1.5 million decline in gains on the Oregon gas cost incentive sharing mechanism due to lower commodity price volatility and higher than estimated gas costs during the cold weather event in January 2024.

Operations and maintenance expense decreased $0.3 million as a result of lower benefit costs, partially offset by higher payroll, cloud computing amortization, and the amortization of deferrals approved in the rate case, which is offset by revenues.

Depreciation increased by $1.0 million due to additional capital investments in the distribution system. General taxes increased $1.1 million primarily due to higher regulatory commission fees.

Other income, net declined $3.8 million primarily from higher pension expense and also lower interest income due to lower level of invested cash and lower equity AFUDC.

Interest expense increased $1.5 million due to higher long-term debt balances.

Other

Other net income decreased $1.6 million (or $0.04 per share) primarily due to lower asset management revenues.

BALANCE SHEET AND CASH FLOWS

During the first three months of 2024, the Company generated $125.0 million in operating cash flows, compared to $176.9 million for the same period in 2023. The Company used $82.5 million in investing activities during the first three months of 2024 primarily for natural gas utility capital expenditures, compared to $73.0 million used in investing activities during the same period in 2023. Net cash used in financing activities was $2.9 million for the first three months of 2024, compared to net cash provided by financing activities of $11.2 million during the same period in 2023. As of March 31, 2024, NW Natural Holdings held cash of $72.4 million.

2024 GUIDANCE AND LONG-TERM TARGETS

NW Natural Holdings reaffirmed its long-term earnings per share growth rate target of 4% to 6% compounded annually from 2022 through 2027. 2022 earnings were $2.54 per share. Holdings' 2024 earnings per share guidance is not in line with that goal primarily due to regulatory lag from our natural gas distribution segment mainly as a result of two factors. First the natural gas distribution segment is making substantial investments to provide continued safe and reliable service for our customers. This increased level of investment and the elevated investment in technology, which is shorter lived and results in higher depreciation expense, is exacerbating the regulatory lag in 2024. Second due to inflationary pressures, the natural gas distribution segment's operating expenses are increasing in 2024 because of several multi-year operations and maintenance contracts renewing, higher personnel costs, the amortization of cloud computing technology investments, and increased pension expense. These factors are part of our request in the Oregon general rate case NW Natural filed at the end of 2023. Based on Oregon statute, new rates are expected to be effective on Nov. 1, 2024.

Primarily because of regulatory lag, NW Natural Holdings today reaffirmed its 2024 annual earnings guidance in the range of $2.20 to $2.40 per share. This guidance assumes continued customer growth, average weather conditions, and no significant changes in prevailing regulatory policies, mechanisms, or outcomes, or significant local, state or federal laws, legislation or regulations.

While subject to change, the Company currently expects the timing of the 2024 quarterly distribution of consolidated earnings per share to be the following:

• Second quarter to be a loss in the range of -$0.08 to -$0.16,
• Third quarter to be a loss in the range of -$0.74 to -$0.86, and
• Fourth quarter to be earnings in the range of $1.43 to $1.63.

DIVIDEND DECLARED

The board of directors of NW Natural Holdings declared a quarterly dividend of 48.75 cents per share on the Company’s common stock. The dividend is payable on May 15, 2024 to shareholders of record on April 30, 2024. The Company's current indicated annual dividend rate is $1.95 per share. Future dividends are subject to board of director discretion and approval.

CONFERENCE CALL AND WEBCAST

As previously announced, NW Natural Holdings will host a conference call and webcast today to discuss its first quarter 2024 financial and operating results.

The call will also be webcast in a listen-only format for the media and general public and can be accessed at ir.nwnaturalholdings.com. A replay of the conference call will be available on our website and by dialing 1-866-813-9403 (U.S.) and +44-204-525-0658 (international). The replay access code is 347383.

ABOUT NW NATURAL HOLDINGS

Northwest Natural Holding Company, (NYSE: NWN) (NW Natural Holdings), is headquartered in Portland, Oregon and has been doing business for over 165 years in the Pacific Northwest. It owns NW Natural Gas Company (NW Natural), NW Natural Water Company (NW Natural Water), NW Natural Renewables Holdings (NW Natural Renewables), and other business interests.

We have a longstanding commitment to safety, environmental stewardship and the energy transition, and taking care of our employees and communities. NW Natural Holdings was recognized by Ethisphere® for the third consecutive year in 2024 as one of the World’s Most Ethical Companies®. NW Natural consistently leads the industry with high J.D. Power & Associates customer satisfaction scores. Learn more in our latest Community and Sustainability Report at nwnatural.com/about-us/the-company/sustainability.

NW Natural is a local distribution company that currently provides natural gas service to approximately 2 million people in more than 140 communities through more than 800,000 meters in Oregon and Southwest Washington with one of the most modern pipeline systems in the nation. NW Natural owns and operates 21.6 Bcf of underground gas storage capacity in Oregon.

NW Natural Water provides water distribution and wastewater services to communities throughout the Pacific Northwest, Texas and Arizona. Today NW Natural Water serves over 180,000 people through approximately 74,000 meters and provides operation and maintenance services to an additional 20,000 connections. Learn more about our water business at nwnaturalwater.com.

NW Natural Renewables is a competitive business committed to leading in the energy transition by providing renewable fuels to support decarbonization in the utility, commercial, industrial and transportation sectors. Learn more at nwnaturalrenewables.com.

Additional information is available at nwnaturalholdings.com.

“World’s Most Ethical Companies” and “Ethisphere” names and marks are registered trademarks of Ethisphere LLC

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" 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, timing, goals, strategies, commitments, future events, investments, 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, utility system, technology and infrastructure investments, system modernization, reliability and resiliency, global, national and local economies, customer and business growth, continued expansion of service territories, customer satisfaction ratings, weather, performance and service during weather events, customer rates or rate recovery and the timing and magnitude of potential rate changes and the potential outcome of rate cases, including our Oregon general rate case, environmental remediation cost recoveries, environmental initiatives, decarbonization and the role of natural gas and the gas delivery system, including decarbonization goals and timelines, energy efficiency measures, use of renewable sources, renewable natural gas purchases, projects, investments and other renewable initiatives, including the construction of RNG facilities, and timing, magnitude and completion thereof, unregulated renewable natural gas strategy and initiatives, renewable hydrogen projects or investments and timing, magnitude, approvals and completion thereof, procurement of renewable natural gas or hydrogen for customers, technology and policy innovations, strategic goals and visions, water, wastewater and water services acquisitions, partnerships, and investment strategy and financial effects of water, wastewater and water services acquisitions, expected growth and safety benefits of facility upgrade investments, diversity, equity and inclusion initiatives, operating plans of third parties, financial results, including estimated income, availability and sources of liquidity, expenses, positions, revenues, returns, cost of capital, timing, and earnings, earnings guidance and estimated future growth rates, future dividends, commodity costs and sourcing, asset management activities, performance, timing, outcome, or effects of regulatory proceedings or mechanisms or approvals, regulatory prudence reviews, anticipated regulatory actions or filings, accounting treatment of future events, effects of legislation or changes in laws or regulations, effects, extent, severity and duration of epidemics and pandemics, and any resulting economic disruption therefrom, inflation, geopolitical uncertainty and other statements that are other than statements of historical facts.

Forward-looking statements are based on current expectations and assumptions regarding its business, the economy, geopolitical factors, and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict. Actual results may differ materially from those contemplated by the forward-looking statements. You are therefore cautioned against relying on any of these forward-looking statements. They are neither statements of historical fact nor guarantees or assurances of future operational, economic or financial performance. Important factors that could cause actual results to differ materially from those in the forward-looking statements are discussed by reference to the factors described in Part I, Item 1A "Risk Factors", and Part II, Item 7 and Item 7A "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Quantitative and Qualitative Disclosure about Market Risk" in the most recent Annual Report on Form 10-K and in Part I, Items 2 and 3 "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Quantitative and Qualitative Disclosures About Market Risk", and Part II, Item 1A, "Risk Factors", in the quarterly reports filed thereafter, which, among others, outline legal, regulatory and legislative risks, public health risks, financial, macroeconomic and geopolitical risks, growth and strategic risks, operational risks, business continuity and technology risks, environmental risks and risks related to our water and renewables businesses.

All forward-looking statements made in this report and all subsequent forward-looking statements, whether written or oral and whether made by or on behalf of NW Holdings or NW Natural, are expressly qualified by these cautionary statements. Any forward-looking statement speaks only as of the date on which such statement is made, and NW Holdings and NW Natural undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law. New factors emerge from time to time and it is not possible to predict all such factors, nor can it assess the impact of each such factor or the extent to which any factor, or combination of factors, may cause results to differ materially from those contained in any forward-looking statements.

NON-GAAP FINANCIAL MEASURES

In addition to presenting the results of operations and earnings amounts in total, certain financial measures are expressed in cents per share, which are non-GAAP financial measures. All references to EPS are on the basis of diluted shares. Such non-GAAP financial measures are used to analyze our financial performance because we believe they provide useful information to our investors and creditors in evaluating our financial condition and results of operations. Our non-GAAP financial measures should not be considered a substitute for, or superior to, measures calculated in accordance with U.S. GAAP. Moreover, these non-GAAP financial measures have limitations in that they do not reflect all the items associated with the operations of the business as determined in accordance with GAAP. Other companies may calculate similarly titled non-GAAP financial measures differently than how such measures are calculated in this report, limiting the usefulness of those measures for comparative purposes. A reconciliation of each non-GAAP financial measure to the most directly comparable GAAP financial measure is provided in the tables above.

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