SAN ANTONIO–(BUSINESS WIRE)–EnCap Flatrock Midstream (“EnCap Flatrock”) today announced the execution of definitive agreements to sell Momentum Midstream (“Momentum,” “M6,” or the “Company”), a leading independent midstream energy company of which EnCap Flatrock is a financial sponsor, to The Williams Companies, Inc. (“Williams”) (NYSE: WMB) for up to $5.5 billion.The transaction is subject to regulatory approval and customary closing conditions. Transaction consideration consists of $3.5 bil