Williams Companies Inc — The Williams Companies, Inc., together with its subsidiaries, operates as an energy infrastructure company primarily in the United States. It operates through Transmission, Power & Gulf, Northeast G&P, West, and Gas & NGL Marketing Services segments. The Transmission, Power & Gulf segment comprises Transco, NWP, and Mountain West interstate natural gas pipelines, and their related natural gas storage facilities, as well as natural gas gathering and processing; and crude oil production handling and transportation assets in the Gulf Coast region. The Northeast G&P segment engages in the midstrea….· via yahoo