EX-21.1 2 d283770dex211.htm SUBSIDIARIES OF THE REGISTRANT Subsidiaries of the registrant

Exhibit 21.1

Subsidiaries of Pioneer Southwest Energy Partners LP as of December 31, 2011

 

Name of Subsidiary

    State or other Jurisdiction  of
Incorporation or Organization		    Ownership  

Pioneer Southwest Energy Partners USA LLC

    Delaware      100 % 

PSE Finance Corporation

    Delaware      100 %