Houston-based food-service company Sysco Corp. turned to Wachtell, Lipton, Rosen & Katz and Arnall, Golden & Gregory for its pending acquisition of US Foods in a deal valued at about $8.2 billion.

Simpson Thacher & Bartlett is advising USF Holding Corp., a portfolio company of Clayton, Dubilier & Rice and Kohlberg Kravis Roberts & Co. that is a majority shareholder of US Foods. Debevoise & Plimpton represents US Foods and Clayton Dubilier.