The following companies are subsidiares of ONEOK: Bighorn Gas Gathering L.L.C., Black Mesa Holdings Inc., Black Mesa Pipeline Inc., Black Mesa Pipeline Operations L.L.C., Black Mesa Technologies Inc., Border Midwestern Company, Border Viking Company, Chisholm Pipeline Company, Chisholm Pipeline Holdings L.L.C., Crestone Energy Ventures L.L.C., Crestone Gathering Services L.L.C., Crestone Powder River L.L.C., Crestone Wind River L.L.C., Fort Union Gas Gathering L.L.C., Guardian Pipeline L.L.C., Heartland Pipeline Company, Lost Creek Gathering Company L.L.C., Mid Continent Market Center L.L.C., Midwestern Gas Transmission Company, Mont Belvieu I Fractionation Facility, NBP Services LLC, New Holdings Inc., New Holdings Sub 1 Inc., New Holdings Sub 2 Inc., Northern Border Pipeline Company, ONEOK Arbuckle II Pipeline L.L.C., ONEOK Arbuckle North Pipeline L.L.C., ONEOK Arbuckle Pipeline L.L.C., ONEOK Bakken Pipeline L.L.C., ONEOK Bushton Processing L.L.C., ONEOK Elk Creek Pipeline L.L.C., ONEOK Energy Services Canada Ltd., ONEOK Energy Services Company II, ONEOK Energy Services Company L.P., ONEOK Energy Services Holdings L.L.C., ONEOK Field Services Company L.L.C., ONEOK Gas Storage Holdings L.L.C., ONEOK Gas Storage L.L.C., ONEOK Gas Transportation L.L.C., ONEOK Hydrocarbon GP L.L.C., ONEOK Hydrocarbon Holdings L.L.C., ONEOK Hydrocarbon L.L.C., ONEOK Hydrocarbon L.P., ONEOK Hydrocarbon Southwest L.L.C., ONEOK ILP GP L.L.C., ONEOK Leasing Company, ONEOK MB I L.P., ONEOK Midstream Gas Supply L.L.C., ONEOK Mont Belvieu Storage Company L.L.C., ONEOK NGL Gathering L.L.C., ONEOK NGL Pipeline L.L.C., ONEOK North System L.L.C., ONEOK Northern Border Pipeline Company Holdings L.L.C., ONEOK Overland Pass Holdings L.L.C., ONEOK Parking Company L.L.C., ONEOK Partners GP L.L.C., ONEOK Partners Intermediate Limited Partnership, ONEOK Partners L.P., ONEOK Permian NGL Operating Company L.L.C., ONEOK Permian NGL Pipeline GP L.L.C., ONEOK Permian NGL Pipeline LP L.L.C., ONEOK Pipeline Holdings L.L.C., ONEOK Rockies Investments L.L.C., ONEOK Rockies Midstream L.L.C., ONEOK Services Company L.L.C., ONEOK Southeast Texas NGL Pipeline L.L.C., ONEOK Sterling III Pipeline L.L.C., ONEOK Texas Gas Storage L.L.C., ONEOK Underground Storage Company L.L.C., ONEOK Unit Holdings Inc., ONEOK VESCO Holdings L.L.C., ONEOK WesTex Transmission L.L.C., ONEOK Western Trail Pipeline L.L.C., OkTex Pipeline Company L.L.C., Overland Pass Pipeline Company LLC, Roadrunner Gas Transmission Holdings LLC, Roadrunner Gas Transmission LLC, Venice Energy Services Company L.L.C., Viking Gas Transmission Company, and West Texas LPG Pipeline Limited Partnership.
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