The Williams Companies Inc together with its subsidiaries operates as an energy infrastructure company primarily in the United States It operates through Transmission Gulf of Mexico Northeast GP West and Gas NGL Marketing Services segments The Transmission Gulf of Mexico segment comprises Transco and Northwest natural gas pipelines and natural gas gathering and processing and crude oil production handling and transportation assets in the Gulf Coast region as well as various petrochemical and feedstock pipelines The Northeast GP segment engages in the midstream gathering processing and fractionation activities in the Marcellus Shale region primarily in Pennsylvania and New York and the Utica Shale region of eastern Ohio The West segment comprises gas gathering processing and treating operations in the Rocky Mountain region of Colorado and Wyoming the Barnett Shale region of northcentral Texas the Eagle Ford Shale region of South Texas the Haynesville Shale region of northwest Louisiana and the MidContinent region which includes the Anadarko Arkoma and Permian basins and operates natural gas liquid NGL fractionation and storage facilities in central Kansas near Conway The Gas NGL Marketing Services segment provides wholesale marketing trading storage and transportation of natural gas for natural gas utilities municipalities power generators and producers risk and asset management and NGL marketing services The company owns and operates 30000 miles of pipelines 29 processing facilities 7 fractionation facilities and approximately 23 million barrels of NGL storage capacity The Williams Companies Inc was founded in 1908 and is headquartered in Tulsa Oklahoma