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X0202 SCHEDULE 13D/A 0001011438-23-000570 0001535472 XXXXXXXX LIVE 2 Common Stock, par value $1 per share 05/06/2026 false 0001692115 844895102 Southwest Gas Holdings, Inc. 8360 S. Durango Drive Las Vegas NV 89113 Keith Meister/Patrick Dooley (212) 474-6700 Corvex Management LP 667 Madison Avenue New York NY 10065 0001535472 Corvex Management LP b AF Y DE 3618161 0 3618161 0 3618161 N 4.99 IA PN 0001307631 Keith A. Meister b AF Y X1 3618161 0 3618161 0 3618161 N 4.99 IN HC Common Stock, par value $1 per share Southwest Gas Holdings, Inc. 8360 S. Durango Drive Las Vegas NV 89113 This Amendment No. 2 ("Amendment No. 2") supplements the information set forth in the Schedule 13D dated October 23, 2023, and as amended by Amendment No. 1 on May 28, 2025, filed by Corvex Management LP ("Corvex") and Keith Meister ("Mr. Meister", and together with Corvex, the "Reporting Persons") with the United States Securities and Exchange Commission (the "Schedule 13D") relating to the shares of common stock, par value $1 per share (the "Shares"), of Southwest Gas Holdings, Inc., a Delaware corporation (the "Issuer"). Capitalized terms used but not defined herein shall have the meanings ascribed to them in the Schedule 13D. The information set forth in response to each separate Item below shall be deemed to be a response to all Items where such information is relevant. Item 3 is hereby amended and restated in its entirety as follows: The Reporting Persons used the working capital of the Corvex Funds to purchase the 3,618,161 Shares reported herein. The total purchase price for the Shares reported herein was approximately $218,295,069. Various of the Reporting Persons may effect purchases of securities through margin accounts maintained for the Corvex Funds with brokers, which extend margin credit as and when required to open or carry positions in their margin accounts, subject to applicable federal margin regulations, stock exchange rules and such firms' credit policies. Positions in Shares may be held in margin accounts and may be pledged as collateral security for the repayment of debit balances in such accounts. Corvex may be deemed to be the beneficial owner of 3,618,161 Shares, which represent approximately 4.99% of the Issuer's outstanding Shares. By virtue of his position as control person of the general partner of Corvex, Mr. Meister may be considered to beneficially own such Shares. The percentage calculated in the immediately foregoing paragraph is calculated based on a total of 72,374,873 Shares outstanding as of May 1, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 5, 2026. Items 7 through 10 of each of the cover pages of this Amendment No. 2 are incorporated herein by reference. Except as set forth in Exhibit 99.1 attached hereto, there have been no transactions in the Shares during the sixty days prior to the date hereof by any of the Reporting Persons. The limited partners of (or investors in) each of the private investment funds for which Corvex or its affiliates acts as general partner and/or investment adviser have the right to participate in the receipt of dividends from, or proceeds from the sale of, the Shares held for the accounts of their respective funds in accordance with their respective limited partnership interests (or investment percentages) in their respective funds. The Reporting Persons ceased to be beneficial owners of more than five percent of the Shares on May 6, 2026. Exhibit 99.1 Transactions in the Shares effected in the past 60 days. Corvex Management LP /s/ Keith Meister Keith Meister / Managing Partner 05/08/2026 Keith A. Meister /s/ Keith Meister Keith Meister / Self 05/08/2026