ONEOK Parking Company LLC, a private subsidiary of ONEOK Inc., owns and operates a parking garage in Tulsa, Okla. Founded in 1906, ONEOK Inc. is an energy services company marketing natural gas and related services to local distribution firms, industrial customers and power generators. The Fortune 500 Company serves more than two million customers in Oklahoma, Kansas and Texas. It is the sole general partner of ONEOK Partners L.P., a publicly traded partnership engaged in natural gas gathering, processing, pipelines and natural gas liquids. Some of the company s customers are Kansas Gas Service, Oklahoma Natural Gas, Texas Gas Service, ONEOK Energy Marketing Company, Natural Gas Gathering and Processing, etc. Platts has recognized the firm amongst the Top 250 Global Energy Companies .