LITTLE ROCK, Ark.--(BUSINESS WIRE)--The Stephens Group, LLC (“The Stephens Group”) today announced that it has closed its previously announced sale of Summit Industrial Construction, LLC (“Summit”) headquartered in Houston, Texas, to Comfort Systems USA, Inc. (NYSE: FIX) (“Comfort Systems”). Summit is a specialty industrial mechanical contractor offering engineering, design-assist and turnkey, direct hire construction services of modular systems serving the advanced technology, power, and industrial sect ...