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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0001539497-25-003071 0000921669 XXXXXXXX LIVE 15 Common Stock, par value $1.00 per share 12/31/2025 false 0001692115 844895102 Southwest Gas Holdings, Inc. C/O SOUTHWEST GAS CORPORATION 8360 S. DURANGO DRIVE LAS VEGAS NV 89113 Jesse A. Lynn COO (305) 422-4100 Icahn Capital LP 16690 Collins Avenue, PH-1 Sunny Isles Beach FL 33160 0001322827 N Icahn Partners Master Fund LP WC N DE 2613437.00 2613437.00 2613437.00 2613437.00 2613437.00 N 3.62 PN 0001322825 N Icahn Offshore LP OO N DE 0.00 2613437.00 0.00 2613437.00 2613437.00 N 3.62 PN 0001313666 N Icahn Partners LP WC N DE 3419167.00 3419167.00 3419167.00 3419167.00 3419167.00 N 4.74 PN 0001322826 N Icahn Onshore LP OO N DE 0.00 3419167.00 0.00 3419167.00 3419167.00 N 4.74 PN 0001412093 N Icahn Capital LP OO N DE 0.00 6032604.00 0.00 6032604.00 6032604.00 N 8.36 PN 0001412091 N IPH GP LLC OO N DE 0.00 6032604.00 0.00 6032604.00 6032604.00 N 8.36 OO 0001034563 N Icahn Enterprises Holdings L.P. OO N DE 0.00 6032604.00 0.00 6032604.00 6032604.00 N 8.36 PN 0001257324 N Icahn Enterprises G.P. Inc. OO N DE 0.00 6032604.00 0.00 6032604.00 6032604.00 N 8.36 CO 0001080113 N Beckton Corp. OO N DE 0.00 6032604.00 0.00 6032604.00 6032604.00 N 8.36 CO 0001889149 N IEP Utility Holdings LLC OO N DE 0.00 0.00 0.00 0.00 0.00 N 0 OO 0000921669 N Carl C. Icahn OO N X1 0.00 6032604.00 0.00 6032604.00 6032604.00 N 8.36 IN Common Stock, par value $1.00 per share Southwest Gas Holdings, Inc. C/O SOUTHWEST GAS CORPORATION 8360 S. DURANGO DRIVE LAS VEGAS NV 89113 This statement constitutes Amendment No. 15 to the Schedule 13D (as amended, the "Schedule 13D") relating to the shares of the common stock, par value $1.00 per share (the "Common Stock"), of Southwest Gas Holdings, Inc., a Delaware corporation (the "Issuer"), and hereby amends the Schedule 13D originally filed with the Securities and Exchange Commission (the "SEC") on June 3, 2022. All capitalized terms contained herein but not otherwise defined shall have the meanings ascribed to such terms in the Schedule 13D. The percentages set forth on the cover pages hereto are based on 72,183,903 shares of Common Stock outstanding as of November 21, 2025, as disclosed by the Issuer in its prospectus supplement filed with the SEC on November 26, 2025. Item 4 of the Schedule 13D is hereby amended by adding the following: On December 31, 2025, Mr. Andrew Teno, who was a designee of the Reporting Persons, resigned from the Board of Directors of the Issuer. Icahn Partners Master Fund LP /s/ Jesse Lynn Jesse Lynn / Chief Operating Officer 01/02/2026 Icahn Offshore LP /s/ Jesse Lynn Jesse Lynn / Chief Operating Officer 01/02/2026 Icahn Partners LP /s/ Jesse Lynn Jesse Lynn / Chief Operating Officer 01/02/2026 Icahn Onshore LP /s/ Jesse Lynn Jesse Lynn / Chief Operating Officer 01/02/2026 Icahn Capital LP /s/ Jesse Lynn Jesse Lynn / Chief Operating Officer 01/02/2026 IPH GP LLC /s/ Ted Papapostolou Ted Papapostolou / Chief Financial Officer 01/02/2026 Icahn Enterprises Holdings L.P. /s/ Ted Papapostolou Ted Papapostolou / Chief Financial Officer 01/02/2026 Icahn Enterprises G.P. Inc. /s/ Ted Papapostolou Ted Papapostolou / Chief Financial Officer 01/02/2026 Beckton Corp. /s/ Ted Papapostolou Ted Papapostolou / Vice President 01/02/2026 IEP Utility Holdings LLC /s/ Ted Papapostolou Ted Papapostolou / Chief Financial Officer 01/02/2026 Carl C. Icahn /s/ Carl C. Icahn Carl C. Icahn 01/02/2026