0001692115 2021-08-27 2021-08-27 0001692115 us-gaap:CommonStockMember 2021-08-27 2021-08-27 0001692115 us-gaap:PreferredStockMember 2021-08-27 2021-08-27 NV true 0001692115 8-K/A 2021-08-27 SOUTHWEST GAS HOLDINGS, INC. DE 001-37976 81-3881866 8360 S. Durango Dr. Post Office Box 98510 Las Vegas 89193-8510 (702) 876-7237 false false false false Southwest Gas Holdings, Inc. Common Stock, $1 par value SWX NYSE Preferred Stock Purchase Rights NYSE false This Amendment No. 1 on Form 8-K/A amends the Current Report on Form 8-K of Southwest Gas Holdings, Inc., a Delaware corporation (the “Company”), filed with the Securities and Exchange Commission on August 30, 2021 (the “Initial Form 8-K”), which described, among other matters, the closing of the transactions contemplated by that certain Agreement and Plan of Merger, dated as of June 28, 2021 (the “Merger Agreement”) by and among Centuri Group, Inc. (“Centuri”), a wholly owned subsidiary of the Company, Electric T&D Holding LLC, a wholly owned subsidiary of Centuri, and ETDH Merger Sub, Inc. with Drum Parent, Inc. (“Drum”) and OCM Drum Investors, L.P., as representative of certain stockholders and option holders of Drum, pursuant to which Centuri acquired Riggs Distler & Company, Inc. This Amendment No. 1 amends the Initial Form 8-K to include the financial statements and unaudited pro forma financial information referred to in Item 9.01(a) and (b) below relating to the Merger.