EX-21 3 dex21.htm SUBSIDIARIES OF THE REGISTRANT Subsidiaries of the Registrant

Exhibit 21


All the companies listed below are included in the company’s consolidated financial statements. Except as otherwise indicated below, the Company has 100% direct or indirect ownership of, and ultimate voting control in, each of these companies. The list is as of December 31, 2010 and excludes subsidiaries which are primarily inactive or taken singly, or as a group, do not constitute significant subsidiaries:



           State or Province of Incorporation            Percentage Owned

Unit Drilling Company

   Oklahoma    100%

Unit Petroleum Company

   Oklahoma    100%

Superior Pipeline Company, L.L.C.

   Oklahoma    100%

Unit Texas Drilling Company L.L.C.

   Oklahoma            100% (indirectly)