Best fortune-500 companies in Oklahoma

ONEOK, Inc. is a leading midstream service provider and owner of one of the nation's premier natural gas liquids systems, connecting NGL supply in the Mid-Continent, Permian and Rocky Mountain regions with key market centers and an extensive network of natural gas gathering, processing, storage and transportation assets.

NGL is a diversified midstream MLP that provides multiple services to producers and end-users. They provide services in transportation, storage, blending and marketing of crude oil, NGLs and Refined Products / Renewables, as well as Water Solutions, Retail Propane, Crude oil from wellhead to refinery, Produced / Flowback water from wellhead to disposal, recycle or discharge water facility, and more.

Chesapeake's portfolio includes high-quality unconventional oil and natural gas assets in top US onshore plays. Their value-driven strategy focuses on continuously generating capital efficiencies and operating with low, industry-leading production and G&A costs, along with a disciplined approach to liquidity.