ONEOK, Inc. is a prominent American energy company based in Tulsa, Oklahoma. Established in 1906 as Oklahoma Natural Gas Company, it has grown into a Fortune 500 and S&P 500 company, focusing on the gathering, processing, storage, transportation, and distribution of natural gas and natural gas liquids (NGLs). The company rebranded to ONEOK in 1980 to reflect its expanded operations beyond utility services.

ONEOK operates primarily through its midstream segment, which includes the gathering, processing, and transportation of natural gas and NGLs. The company serves a diverse range of customers, including natural gas producers, utilities, commercial and industrial clients, and energy marketers. ONEOK is committed to safety, reliability, and operational excellence, ensuring sustainable growth and value for its shareholders while actively contributing to the communities it serves.