Williams Partners LP owns, operates and acquires a diversified portfolio of complementary energy assets. It is engaged in the business of gathering, transporting and processing natural gas and fractionating and storing natural gas liquids. The company operates its business through the following segments: Gas Pipeline and Midstream Gas and Liquids. The Gas Pipeline segment includes interstate natural gas pipelines and pipeline joint venture investments. The Midstream Gas and Liquids segment includes natural gas gathering, treating and processing business and is comprised of several wholly owned and partially owned subsidiaries. Williams Partners was founded in February 2005 and is headquartered in Tulsa, OK.