EX-21 11 dex21.htm REQUIRED INFORMATION CONCERNING THE REGISTRANT'S SUBSIDIARIES Required information concerning the registrant's subsidiaries

Exhibit 21

 

Subsidiary

    State of
Incorporation
or Organization

Chisholm Pipeline Company (50%)

    Delaware

Chisholm Pipeline Holdings, Inc.

    Delaware

Fox Plant, L.L.C. (50%)

    Delaware

Kansas Gas Marketing Company

    Kansas

Mercado Gas Services Inc.

    Delaware

Mid Continent Market Center, Inc.

    Kansas

Northern Plains Natural Gas Company, LLC1

    Delaware

NBP Services, LLC

    Delaware

Northern Border Pipeline Corporation

    Delaware

Oasis Acquisition Corporation

    California

Oklahoma Natural Energy Services Company

    Oklahoma

OkTex Pipeline Company

    Delaware

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 Company

    Oklahoma

ONEOK Field Services Holdings, 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 Kansas Company

    Kansas

ONEOK Kansas Properties, L.L.C.

    Kansas

ONEOK Leasing Company

    Delaware

ONEOK MB I, L.P.2

    Delaware

ONEOK Midstream Gas Supply, L.L.C.

    Oklahoma

ONEOK NGL Pipeline, L.P.

    Delaware

ONEOK Palo Duro Pipeline Company, Inc.

    Delaware

ONEOK Parking Company, L.L.C.

    Delaware

ONEOK Pipeline, Inc.

    Oklahoma
1 Northern Plains Natural Gas Company, LLC owns a 1.067% limited partner interest and a .5% general partner interest in Northern Border Partners, L.P. The direct and indirect subsidiaries of Northern Border Partners, L.P. are not listed here.
2 ONEOK MB I, L.P. owns 80% of the Mont Belvieu I Fractionation Facility.

Updated March 7, 2006

ONEOK Propane Company

    Delaware

ONEOK Sayre Storage Company

    Delaware

ONEOK Services Company

    Oklahoma

ONEOK Texas Gas Storage, L.P.

    Texas

ONEOK Texas Resources, Inc.

    Delaware

ONEOK Transmission Company

    Delaware

ONEOK Underground Storage Company

    Kansas

ONEOK VESCO Holdings, L.L.C.3

    Delaware

ONEOK WesTex Transmission, L.P.

    Delaware

Pan Border Gas Company, LLC4

    Delaware

Potato Hills Gas Gathering System (joint venture) (51%)

    Oklahoma

Sycamore Gas System (general partnership) (48.445%)

    Oklahoma

TGS Rio, L.L.C.

    Delaware

In addition to the interests of the Company in the Subsidiaries set forth above, the Company also directly or indirectly holds various undivided interests in facilities relating to the oil and gas business and holds minority interests in various other entities and ventures.

3 ONEOK VESCO Holdings, L.L.C. owns a 10.1765% interest in Venice Energy Services Company, L.L.C., a Delaware limited liability company.
4 Pan Border Gas Company, LLC owns a .3250% general partner interest in Northern Border Partners, L.P. The direct and indirect subsidiaries of Northern Border Partners, L.P. are not listed here.

 

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