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Exhibit 21

SUBSIDIARY COMPANIES




 
Name of Subsidiary
State or Country
of Incorporation
Percent
Owned
 
Kerr-McGee Chemical LLC
 
Delaware 
 
100%
Kerr-McGee Chemical Worldwide LLC
Delaware 
100%
Kerr-McGee China Petroleum, Ltd.
Bahama Islands
100%
Kerr-McGee Gryphon Limited
England
100%
Kerr-McGee (Nevada) LLC
Nevada
100%
Kerr-McGee North Sea (U.K.) Limited
England 
100%
Kerr-McGee Oil & Gas Corporation
Delaware
100%
Kerr-McGee Oil & Gas Onshore LP
Delaware
100%
Kerr-McGee Oil (U.K.) PLC
England
100%
Kerr-McGee Pigments GmbH
Germany
100%
Kerr-McGee Pigments (Savannah), Inc.
Georgia
100%
Kerr-McGee Resources (U.K.) Limited
England
100%
Kerr-McGee Rocky Mountain Corporation
Delaware
100%
KMCC Western Australia Pty. Ltd
Western Australia
100%
Westport Oil and Gas Company, L.P.
Delaware
100%


A number of additional subsidiaries are omitted since, considered in the aggregate as a single subsidiary, they would not constitute a significant subsidiary as of December 31, 2004.