ONEOK, Inc. is an energy midstream service provider in the United States. The Company owns and operates natural gas liquids (NGL) systems, and is engaged in the gathering, processing, storage and transportation of natural gas. THe Company's operations include a 38,000-mile integrated network of NGL and natural gas pipelines, processing plants, fractionators and storage facilities in the Mid-Continent, Williston, Permian and Rocky Mountain regions. The Company operates through...