 LAS VEGAS, June 29, 2021 PRNewswire -- Southwest Gas Holdings, Inc. NYSE: SWX announced today that its wholly-owned subsidiary, Centuri Group, Inc. Centuri, has entered into a definitive agreement under which Centuri will acquire Riggs Distler Company, Inc. and its affiliates Riggs Distler. Founded in 1909, and based in Cherry Hill, New Jersey, Riggs Distler has extensive relationships and long-term Master Service Agreements MSA with nearly all of the major investor-owned electric utilities in the Northeast and Mid-Atlantic regions and provides unionized installation and repair services to its utility customers. 