Exhibit 21
SUBSIDIARIES OF THE COMPANY
Divisions
Oklahoma Natural Gas Company, a division of ONEOK, Inc.
Kansas Gas Service Company, a division of ONEOK, Inc.
Texas Gas Service Company, a division of ONEOK, Inc.
ONEOK Gas Transportation Company, a division of ONEOK, Inc.
Subsidiaries of ONEOK, Inc. | State of Incorporation or Organization | |
Kansas Gas Marketing Company | Kansas | |
Mercado Gas Services Inc. | Delaware | |
ONEOK Partners GP, L.L.C. | Delaware | |
NBP Services, LLC | Delaware | |
Northern Border Pipeline Corporation | Delaware | |
ONEOK NB Company | Delaware | |
Oklahoma Natural Energy Services Company | Oklahoma | |
ONEOK Bushton Processing, Inc. | Delaware | |
ONEOK Energy Marketing Company | Oklahoma | |
ONEOK Energy Services Canada, Ltd. | Canada | |
ONEOK Energy Services Company, II | Delaware | |
ONEOK Energy Services Company, L.P. | Texas | |
ONEOK Energy Services Holdings, L.L.C. | Oklahoma | |
ONEOK Field Services Holdings, L.L.C. | Oklahoma | |
ONEOK Kansas Company | Kansas | |
ONEOK Kansas Properties, L.L.C. | Kansas | |
ONEOK Leasing Company | Delaware | |
ONEOK Parking Company, L.L.C. | Delaware | |
ONEOK Propane Company | Delaware | |
ONEOK Services Company | Oklahoma | |
ONEOK Texas Resources, Inc. | Delaware | |
ONEOK PB Company, L.L.C. | Delaware | |
ONEOK Partners, L.P. (45.7%) | Delaware | |
Subsidiaries of ONEOK Partners Intermediate Limited Partnership: | ||
ONEOK Partners Intermediate Limited Partnership | Delaware | |
ONEOK ILP GP, L.L.C. | Delaware | |
Bear Paw Investments, LLC | Delaware | |
Bear Paw Energy, LLC | Delaware | |
Bear Paw Processing Company (Canada), Ltd. | Alberta | |
Brown Bear Enterprises, LLC | Delaware |
Border Minnesota Pipeline, LLC | Delaware | |
Black Mesa Holdings, Inc. | Delaware | |
Black Mesa Pipeline, Inc. | Delaware | |
Black Mesa Pipeline Operations, L.L.C. | Delaware | |
Black Mesa Technologies, Inc. | Oklahoma | |
Black Mesa Technologies Services, LLC (60%) | Oklahoma | |
Border Midstream Services, Ltd. | Alberta | |
Border Midwestern Company | Delaware | |
Midwestern Gas Marketing Company | Delaware | |
Midwestern Gas Transmission Company | Delaware | |
Border Viking Company | Delaware | |
Viking Gas Transmission Company | Delaware | |
Crestone Energy Ventures, L.L.C. | Delaware | |
Crestone Bighorn, L.L.C. | Delaware | |
Crestone Gathering Services, L.L.C. | Delaware | |
Crestone Powder River, L.L.C. | Delaware | |
Crestone Wind River, L.L.C. | Delaware | |
Northern Border Pipeline Company (general partnership) (50%) | Texas | |
China Pipeline Holdings Ltd. (0.81%) | Cayman Islands | |
Guardian Pipeline, L.L.C. | Delaware | |
Bighorn Gas Gathering, L.L.C. (49.0%) | Delaware | |
Fort Union Gas Gathering, L.L.C. (37.04%) | Delaware | |
Lost Creek Gathering Company, L.L.C. (35%) | Delaware | |
Chisholm Pipeline Company (50%) | Delaware | |
Chisholm Pipeline Holdings, L.L.C. | Delaware | |
Mid Continent Market Center, L.L.C. | Kansas | |
OkTex Pipeline Company, L.L.C. | Delaware | |
ONEOK Arbuckle Pipeline, L.L.C. | Delaware | |
ONEOK Arbuckle Land Company | Texas | |
ONEOK Field Services Company, L.L.C. | Oklahoma | |
ONEOK Gas Gathering, L.L.C. | Oklahoma | |
ONEOK Gas Storage Holdings, L.L.C. | Delaware | |
ONEOK Gas Storage, L.L.C. | Oklahoma | |
ONEOK Gas Transportation, L.L.C. | Oklahoma | |
ONEOK Hydrocarbon, L.L.C. | Delaware | |
ONEOK Hydrocarbon, L.P. | Delaware | |
ONEOK Hydrocarbon GP, L.L.C. | Delaware | |
ONEOK Hydrocarbon Holdings, L.L.C. | Delaware | |
ONEOK Hydrocarbon Southwest, L.L.C. | Delaware | |
ONEOK MB I, L.P. | Delaware | |
ONEOK Midstream Gas Supply, L.L.C. | Oklahoma | |
ONEOK Mont Belvieu Storage Company, L.L.C. | Delaware | |
ONEOK NGL Pipeline, L.L.C. | Delaware | |
ONEOK NGL Gathering, L.L.C. | Delaware | |
ONEOK North System, L.L.C. | Delaware | |
ONEOK Overland Pass Holdings, L.L.C. | Oklahoma |
ONEOK Pipeline Holdings, L.L.C. | Delaware | |
ONEOK Texas Gas Storage, L.L.C. | Texas | |
ONEOK Transmission Company, L.L.C. | Delaware | |
ONEOK Underground Storage Company, L.L.C. | Kansas | |
ONEOK VESCO Holdings, L.L.C. | Delaware | |
ONEOK WesTex Transmission, L.L.C. | Delaware | |
Overland Pass Pipeline Company LLC | Delaware | |
Potato Hills Gas Gathering System (joint venture) (51%) | Oklahoma | |
Sycamore Gas System (general partnership) (48.445%) | Oklahoma | |
Venice Energy Services Company, L.L.C. (10.1765%) | Delaware | |
Mont Belvieu I Fractionation Facility (joint venture)(80%) | Texas | |
Heartland Pipeline Company (general partnership) (50%) | Texas |