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Regulatory Progress and Cost Management Improve Trailing 12-Month Utility ROE to 8.3%

Nevada Enacts Law Enabling Alternative Ratemaking for Natural Gas Utilities

CTRI Follow-on Offerings Drive Over听$470 million in Debt Reduction, Strengthening Balance Sheet

LAS VEGAS, Aug. 6, 2025 /PRNewswire/ -- Southwest Gas Holdings, Inc. (NYSE: SWX) ("Southwest Gas Holdings" or "Company") today reported results for its second quarter ended 闯耻苍别听30,听2025. This earnings release should be read in conjunction with the Form 10-Q and earnings slides, which are concurrently being posted at .

"This quarter we continued to improve operational and financial performance at Southwest Gas Corporation, and we saw constructive regulatory developments in both Arizona and Nevada. The Arizona Corporation Commission ("ACC") approved a capital tracker program; and, in Nevada, Governor Lombardo signed Senate Bill 417 allowing for alternative ratemaking, which we anticipate will have positive impacts on price stability, regulatory cost reduction, and consumer protection enhancements," said Karen Haller, President and Chief Executive Officer at Southwest Gas Holdings. "Additionally, with the successful closing of two follow-on offerings and associated private placement sales of Centuri Holdings, Inc. (NYSE: CTRI) ("Centuri") common stock, Southwest Gas Holdings reduced its ownership of Centuri to approximately 52%, continuing our transformation into a premier, pure-play, fully regulated natural gas business. We used proceeds from these transactions to reduce debt by over $470 million, further strengthening our balance sheet. We remain committed to fully separating Centuri and are evaluating the timing of further separation transactions with the objectives of optimizing value and limiting execution risk," added Haller.

"Looking forward, we have begun negotiations on initial precedent agreements with potential new shippers at Great Basin Gas Transmission Company, as the 2028 Expansion Project binding open season capacity demand increased to about 1.76 billion cubic ("Bcf") feet per day from the approximately 1.25 Bcf amount we previously announced in June," concluded Haller.

Recent Operational and Financial Highlights

• Southwest Gas Holdings closed two follow-on offerings of听Centuri common stock, with net proceeds used to reduce the Company's debt by ~$470 million;
• Southwest Gas Corporation ("Southwest Gas", "Utility", or "Natural Gas Distribution") delivered Utility return on period-end equity of 8.3% over the 12 months ended June 30, 2025, and earnings growth of 22% over 2Q 2024;
• In June 2025, Nevada Governor听Lombardo signed Senate Bill 417, new legislation allowing Southwest Gas to apply to the Public Utilities Commission of Nevada for alternative ratemaking plans;
• System Integrity Mechanism approved by听ACC, with a $50 million cap on qualifying capital;
• After reopening the Great Basin Gas Transmission Company's 2028 Expansion Project binding open season, Southwest Gas has received expanded potential demand of up to ~1.76 Bcf per day and potential estimated incremental capital investment opportunity of ~$1.2 billion to $1.6 billion, with an anticipated expansion rate between $14 and $17 per dekatherm per month and a minimum of 20 years for each transportation service agreement;
• Southwest Gas added approximately 40,000 new meter sets during the 12 months ended June 30, 2025, resulting in a 1.8% customer growth rate over the same period;
• Southwest Gas received approval, for rates effective July 2025, to reduce customer rates in order to accelerate the return to Nevada customers of the amount of purchased gas costs over-collected under its purchased gas cost recovery mechanism ("PGA") in the state;
• As of June 30, 2025, the Company had $356 million of cash, and more than $1.0 billion in available liquidity.

Earnings Reconciliation Table

The table below provides a reconciliation of net income attributable to Southwest Gas Holdings for the three months ended 闯耻苍别听30,听2025, from the same period in 2024 (items are in millions and are before related income tax impact unless otherwise noted):

Southwest Gas Holdings' second quarter net income declined by $31.2 million compared to the same period in the prior year, primarily the result of the impacts related to income taxes on the sale of听Centuri stock. These sale transactions eliminated the Company's ability to include Centuri in its consolidated federal and certain state income tax returns, and to pursue a tax-free disposition, which resulted in the recognition of tax expense on book-to-tax differences relating to the Company's investment in Centuri. This impact is expected to be partially offset by lower tax expense following the disposition of the remaining Centuri stake. Southwest Gas' net income improvement of $6.1 million was driven by regulatory improvements to operating margin, while Centuri also showed an improvement of $0.7 million in net income during the second quarter. Southwest Gas Holdings' adjusted net income was $16.1 million higher than the second quarter of 2024, representing a 71% increase.

Southwest Gas Holdings' year-to-date net income declined by $5.1 million compared to the same period in the prior year, primarily the result of the impacts of the sale of Centuri stock as discussed in the quarterly drivers above. Southwest Gas' year-to-date net income improvement of $13.2 million was driven by regulatory improvements to operating margin, while Centuri also showed an improvement of $17.0 million in net loss during the same period. Southwest Gas Holdings' year-to-date adjusted net income was $37.0 million, or 31%, higher than the same period of the prior year.

Southwest Gas / Natural Gas Distribution - Second Quarter 2025

Key drivers of second quarter 2025 net income as compared to second quarter 2024 include:

• Increased operating margin contributed $26.6 million. Combined rate relief across all our service territories added approximately $23.7 million of incremental margin, and an additional $2.5 million was attributable to customer growth, as approximately 40,000 first-time meter sets were added during the last twelve months;
• Operations and maintenance expense increased $7.0 million. The increase was primarily driven by an increase in employee-related labor and benefit costs of $5.0 million and certain external contractor and professional services expenses in various areas of the business. These increases were partially offset by reductions in leak survey and line locating expenses;
• Depreciation and amortization expense and other taxes increased $9.3 million, including an increase in depreciation on gas plant, driven by a 7% increase in average gas plant in service since the second quarter of 2024;
• Other income improved $3.6 million, driven primarily by a $4.5 million increase in values associated with company-owned life insurance ("COLI") as well as a $1.6 million one-time non-operating gain on an asset sale. These increases were partially offset by a $3.3听million decline in interest income related to carrying charges associated with regulatory account balances, notably, deferred purchased gas adjustment ("PGA") cost balances, which drove other income lower. On a combined basis, deferred PGA cost balances changed from a net liability balance of $82 million as of June 30,听2024, to a net liability balance of $349 million as of 闯耻苍别听30,听2025;
• Interest expense increased $4.9 million compared to the second quarter of 2024, due to higher interest incurred on the over-collected balance of the听PGA account, compared with the interest income recorded in other income during last year's second quarter. Additionally, the regulatory treatment related to Southwest Gas' industrial development revenue bonds (offset in margin) that are amortized through interest expense drove interest expense higher;
• Income taxes increased $2.9 million, principally resulting from higher pre-tax net income.

Southwest Gas / Natural Gas Distribution - Year-To-Date 2025

Key drivers of year-to-date 2025 net income as compared to the corresponding period in 2024 include:

• Increase in operating margin contributed $65.5 million period-over-period primarily attributable to combined rate relief across all of our service territories, which added approximately $51.1 million of incremental margin, and an additional $7.6 million was attributable to customer growth, including approximately 40,000 first-time meter sets during the last twelve months. Increases in recoveries and returns associated with regulatory account balances and the variable interest expense adjustment mechanism in Nevada (for which amortization is recognized in interest expense), along with revenue from customers outside of the decoupling mechanisms combined to increase margin by $6.7听尘颈濒濒颈辞苍;
• Operations and maintenance expense increased $5.6 million, or 2%, between periods. The increase was primarily driven by employee-related labor and benefit costs of $4 million, insurance costs of $2.3 million, and external contractor and professional services expenses. These increases, along with others, were partially offset by a reduction in leak survey and line locating costs;
• Depreciation and amortization expense and other taxes increased $19.0 million, including an increase in depreciation on gas plant, driven by a 7% increase in average gas plant in service since the corresponding period of 2024. $5.9 million in higher amortization expenses associated with recovery of regulatory program balances further contributed to the increase;
• Other income decreased approximately $5.2 million. Interest income declined $7.3 million between periods primarily reflecting a reduction to carrying charges associated with regulatory account balances, notably, deferred听PGA cost balances, which decreased from a net liability balance of $82 million as of June 30,听2024, to a net liability balance of $349 million as of 闯耻苍别听30,听2025. In addition, the values associated with COLI policies decreased $0.8 million between periods. These decreases were partially offset by lower contributions and a one-time non-operating gain on an asset sale;
• Net interest deductions increased $13.1 million in the first six months of 2025, as compared to the prior-year period, due to higher interest incurred on the over-collected balance of the听PGA account, compared with the interest income recorded in other income during the same period last year. Additionally, the regulatory treatment related to Southwest Gas' industrial development revenue bonds (offset in margin) that are amortized through interest expense drove interest expense higher.

Centuri / Utility Infrastructure Services - Second Quarter 2025

Net income improved by $0.7 million while adjusted net income improved by $2.9 million, respectively, when compared with the same period in the prior year. The improvement in second quarter income was largely due to lower interest expense between comparable periods. Please see Centuri's earnings release and associated 10-Q, also published today, for further information.

Centuri / Utility Infrastructure Services - Year-To-Date 2025

Net loss improved by $17.0 million while adjusted net loss improved by $15.6 million, respectively, when compared with the same period in the prior year. Improved year-to-date 2025 results were the result of higher net volume of work under master services agreements as well as lower interest expense; partially offset by a reduction in gas utility infrastructure services revenues. Centuri achieved a book-to-bill ratio¹ of 2.3x in the first half of 2025, which included customer awards of approximately $3.0 billion during the first half of the year.

Corporate and Administrative - Second Quarter 2025

Net loss increased by $38.0 million while adjusted net loss decreased by $7.0 million, respectively, when compared with the same period in the prior year. The second quarter of 2025 was affected by the impacts related to income taxes on the sale of Centuri stock. These sale transactions eliminated the Company's ability to include Centuri in its consolidated federal and certain state income tax returns, and to pursue a tax-free disposition, which resulted in the recognition of tax expense on book-to-tax differences relating to the Company's investment in Centuri. This impact is expected to be partially offset by lower tax expense following the disposition of the remaining听Centuri stake. Additionally, lower operating expense and interest expense partially offset the income tax impacts.

Corporate and Administrative - Year-To-Date 2025

Net loss increased by $35.3 million while adjusted net loss decreased by $8.2 million, respectively, when compared with the same period in the prior year. Year-to-date 2025 was affected by the impacts of the sale of Centuri stock as discussed in the quarterly drivers above. Additionally, lower operating expense and interest expense partially offset the income tax impacts.

Southwest Gas / Natural Gas Distribution Segment Guidance and Outlook:

The Company reaffirms its forward-looking guidance for Southwest Gas, as follows:

Centuri Separation Update

Southwest Gas Holdings continues to evaluate market conditions and its options for a divestiture of its remaining shares of Centuri common stock utilizing the taxable structure options that it has previously disclosed. Southwest Gas Holdings remains committed to pursuing a pure-play utility strategy through a disposition of its remaining interest in Centuri.

Conference Call and Webcast

Southwest Gas Holdings will host a conference call on Wednesday, August听6, 2025, at 11:00 a.m. ET to discuss its second quarter 2025 results. The associated press release and presentation slides are available at swgasholdings.com. The call will be webcast live on the Company's website at swgasholdings.com. The telephone dial-in numbers in the U.S. and Canada are toll free:听 (800) 836-8184 or international (646) 357-8785. The webcast will be archived on the Southwest Gas Holdings website.

About Southwest Gas Holdings

Southwest Gas Holdings, Inc., through its primary operating subsidiary Southwest Gas Corporation, engages in the business of purchasing, distributing and transporting natural gas. Southwest Gas Corporation is a dynamic energy company committed to exceeding the expectations of over 2 million customers throughout Arizona, Nevada, and California by providing safe and reliable service while innovating sustainable energy solutions to fuel the growth in its communities. In addition, Southwest Gas Holdings, Inc. is the majority owner of Centuri Holdings, Inc., which provides comprehensive utility infrastructure services across North America.

Forward-Looking Statements: This press release contains forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such statements include, without limitation, statements regarding Southwest Gas Holdings, Inc. (the "Company" or "Southwest Gas Holdings"), Southwest Gas Corporation (the "Utility" or "Southwest Gas"), Centuri Holdings, Inc. ("Centuri") and their expectations or intentions regarding the future. These forward-looking statements can often be identified by the use of words such as "will", "predict", "continue", "forecast", "expect", "believe", "anticipate", "outlook", "could", "target", "project", "intend", "plan", "seek", "pursue", "estimate", "should", "may" and "assume", as well as variations of such words and similar expressions referring to the future, and include (without limitation) statements regarding expectations of continuing growth in 2025 and the future, and statements regarding the Great Basin Gas Transmission Company ("Great Basin") 2028 Expansion Project, including projected demand, capacity, capital expenditures, and investment opportunity. In addition, the statements that are not historic constitute forward-looking statements. A number of important factors affecting the business and financial results of the Company, Utility, and Centuri could cause actual results to differ materially from those stated in the forward-looking statements. These factors include, but are not limited to, statements regarding the proposed transaction structure and timing of a separation of our remaining interests in Centuri, the timing and impact of executing (or not executing) such transaction alternatives, the timing and amount of rate relief, changes in rate design, customer growth rates, the effects of regulation/deregulation, tax reform and similar changes and related regulatory decisions, the impacts of construction activity at Centuri, the potential for, and the impact of, a credit rating downgrade, the costs to integrate new businesses, future earnings trends, inflation, sufficiency of labor markets and similar resources, seasonal patterns, current and future litigation, regulatory approvals for the Great Basin 2028 Expansion Project along with negotiation and execution of binding transportation service agreements and capital construction costs, and the impacts of stock market volatility. In addition, the Company can provide no assurance that its discussions about future operating margin, operating income, COLI earnings, interest expense, and capital expenditures of the natural gas distribution segment will occur. Likewise, the Company can provide no assurance regarding segment revenues, margin or growth rates, that projects expected to be undertaken with results as stated will occur, nor that interest expense patterns will transpire as expected, that increases in costs will be timely incorporated in contracts and revenues, that customer materials will be available timely to efficiently complete projects, or that inefficiencies in the mix of work will not result, nor can it provide assurance regarding acquisitions or their impacts, including management's plans or expectations related thereto. Factors that could cause actual results to differ also include (without limitation) those discussed under the heading "Risk Factors," "Management's Discussion and Analysis of Financial Condition and Results of Operations," and "Quantitative and Qualitative Disclosure about Market Risk" in Southwest Gas Holdings, Inc.'s and Centuri Holdings, Inc.'s most recent Annual Report on Form 10-K and in the Company's, Centuri's, and Southwest Gas Corporation's current and periodic reports, including our Quarterly Reports on Form 10-Q, filed from time to time with the Securities and Exchange Commission. The statements in this press release are made as of the date of this press release, even if subsequently made available by the Company on its website or otherwise. The Company does not assume any obligation to update the forward-looking statements, whether written or oral, that may be made from time to time, whether as a result of new information, future developments, or otherwise.

Non-GAAP Measures.听 This press release contains financial measures that have not been calculated in accordance with accounting principles generally accepted in the U.S. ("GAAP"). These non-GAAP measures include (i) adjusted consolidated earnings per diluted share, (ii) adjusted consolidated net income, (iii) natural gas distribution segment operating margin, (iv)听utility infrastructure services segment adjusted net income (loss), and (v) adjusted corporate and administrative net loss. Management uses these non-GAAP measures internally to evaluate performance and in making financial and operational decisions. Management believes that its presentation of these measures provides investors greater transparency with respect to its results of operations and that these measures are useful for a period-to-period comparison of results. Management also believes that providing these non-GAAP financial measures helps investors evaluate the Company's operating performance, profitability, and business trends in a way that is consistent with how management evaluates such performance. Adjusted consolidated net income, adjusted consolidated earnings per diluted share, and adjusted corporate and administrative net loss for the three- and six-months ended 闯耻苍别听30,听2025 and 2024 includes adjustments to add back costs incurred to facilitate a separation of Centuri, the deferred income tax expense resulting from income tax deconsolidation, amortization of intangible assets at Centuri, and nonrecurring professional service fees. Management believes that it is appropriate to adjust for expenses related to costs to facilitate a separation of Centuri, including the deferred income tax expense impacts of deconsolidation for income tax purposes, as well as the impacts of nonrecurring professional service fees because they are expenses and charges that will not recur following completion of these events. The amortization of certain acquisition intangible assets applies to our utility infrastructure services segment adjusted net income (loss) and therefore applies to adjusted net income at the Southwest Gas Holdings consolidated level and adjusted consolidated earnings per diluted share as well. We believe this adjustment is a common adjustment in the infrastructure services industry and that this adjustment allows investors to more clearly compare earnings performance with Centuri peer performance.

Management also uses the non-GAAP measure, operating margin, related to its natural gas distribution operations. Southwest Gas recognizes operating revenues from the distribution and transportation of natural gas (and related services) to customers. Gas cost is a tracked cost, which is passed through to customers without markup under purchased gas adjustment mechanisms, impacting revenues and net cost of gas sold on a dollar-for-dollar basis, thereby having no impact on Southwest Gas' profitability. Therefore, management routinely uses operating margin, defined by management as regulated operations revenues less the net cost of gas sold, in its analysis of Southwest Gas' financial performance. Operating margin also forms a basis for Southwest Gas' various regulatory decoupling mechanisms. Management believes supplying information regarding operating margin provides investors and other interested parties with useful and relevant information to analyze Southwest Gas' financial performance in a rate-regulated environment.

The Southwest Gas Holdings, Inc. tables included herein provides reconciliations for these non-GAAP measures.

We do not provide a reconciliation of forward-looking Non-GAAP Measures to the corresponding forward-looking GAAP measure due to our inability to project special charges and certain expenses.

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Reconciliation of non-GAAP financial measures of Adjusted consolidated, corporate and administrative, and utility infrastructure services net income (loss) and Adjusted consolidated earnings (loss) per diluted share and their comparable GAAP measures of Net income (loss) and Earnings (loss) per diluted share are presented below. Note that the comparable GAAP measures of Net income (loss) are also included in Note 6 鈥� Segment Information in the Company's 闯耻苍别听30,听2025, Form 10-Q.

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SOURCE Southwest Gas Holdings, Inc.