 RICHMOND, Va.--BUSINESS WIRE--Harris Williams, a global investment bank specializing in MA advisory services, announces it advised Riggs Distler Company, Inc. Riggs Distler, a portfolio company of funds managed by Oaktree Capital Management, L.P. Oaktree, on its sale to Centuri Group, Inc. Centuri, a wholly-owned subsidiary of Southwest Gas Holdings, Inc. NYSE: SWX; SWGH. Riggs Distler is a leading provider of power and utility services throughout the Northeast and Mid-Atla 