EXHIBIT 21.1
SUBSIDIARIES OF THE COMPANY
as of December 31, 2005
as of December 31, 2005
State or Jurisdiction | ||||||
of Organization | Subsidiaries | Ownership % | ||||
Delaware | DMLP CO. | 100.0 | ||||
Colorado | Long Canyon Gas Company, LLC | 75.4 | ||||
Colorado | Lorencito Gas Gathering, LLC | 85.0 | ||||
Delaware | Mesa Environmental Ventures Co. | 100.0 | ||||
Delaware | Parker & Parsley Argentina, Inc. | 100.0 | ||||
South Africa | Petroleum South Cape (Pty) Ltd. | 100.0 | ||||
Canada | Pioneer Canada ULC | 100.0 | ||||
Canada | Pioneer Energy Canada Ltd. | 100.0 | ||||
Delaware | Pioneer International Resources Company | 100.0 | ||||
Nigeria | Pioneer JDZ Limited | 100.0 | ||||
Texas | Pioneer Natural Gas Company | 100.0 | ||||
Delaware | Pioneer Natural Resources Alaska, Inc. | 100.0 | ||||
Cayman Islands | Pioneer Natural Resources Algeria Limited | 100.0 | ||||
Cayman Islands | Pioneer Natural Resources Anaguid Ltd. | 100.0 | ||||
Argentina | Pioneer Natural Resources (Argentina) S.A. | 100.0 | ||||
Canada | Pioneer Natural Resources Canada | 100.0 | ||||
Canada | Pioneer Natural Resources Canada Inc. | 100.0 | ||||
Cayman Islands | Pioneer Natural Resources Equatorial Guinea Limited | 100.0 | ||||
Texas | Pioneer Natural Resources Foundation | 100.0 | ||||
Bahamas | Pioneer Natural Resources Libya Limited | 100.0 | ||||
Cayman Islands | Pioneer Natural Resources Morocco Limited | 100.0 | ||||
Nigeria | Pioneer Natural Resources Nigeria (320) Limited | 58.8 | ||||
Cayman Islands | Pioneer Natural Resources Nigeria Ltd. | 100.0 | ||||
Delaware | Pioneer Natural Resources Properties LP | 100.0 | ||||
South Africa | Pioneer Natural Resources South Africa (Pty) Limited | 100.0 | ||||
Argentina | Pioneer Natural Resources (Tierra Del Fuego) S.A. | 100.0 | ||||
Cayman Islands | Pioneer Natural Resources Tunisia Ltd. | 100.0 | ||||
United Kingdom | Pioneer Natural Resources UK Limited | 100.0 | ||||
Delaware | Pioneer Natural Resources USA, Inc. | 100.0 | ||||
Nigeria | Pioneer Nigeria Deepwater Limited | 100.0 | ||||
Nigeria | Pioneer NR Nigeria (256) Limited | 100.0 | ||||
Cayman Islands | Pioneer Resources Africa Limited | 100.0 | ||||
Bahamas | Pioneer Resources Gabon Limited | 100.0 | ||||
Delaware | Pioneer Shelf Properties Incorporated | 100.0 | ||||
Texas | Pioneer Uravan, Inc. | 100.0 | ||||
Delaware | Westpan NGL LP | 100.0 | ||||
Delaware | Westpan Properties, Inc. | 100.0 | ||||
Nevada | Westpan Resources Company | 100.0 | ||||
Delaware | Westpan Resources LP | 100.0 | ||||
Partnerships that Pioneer Natural Resources USA, Inc. is the managing general partner | ||||||
Texas | Parker & Parsley 87-A Conv., Ltd. | |||||
Delaware | Parker & Parsley Private Investment 88 L.P. | |||||
Delaware | Parker & Parsley Private Investment 89, L.P. | |||||
Delaware | Parker & Parsley 90 Spraberry Private Development, L.P. | |||||
Texas | Midkiff Development Drilling Program, Ltd. | |||||
Texas | Mesa Offshore Royalty Partnership |