UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	August 29, 2012 3:00 P.M.

Form:	S-3
CIK: 0001407463 Company Name: Pioneer Southwest Energy Partners L.P. File Number: 333-183380
CIK: 0001471040 Company Name: Pioneer Southwest Energy Partners USA LLC File Number: 333-183380-02
CIK: 0001470997 Company Name: PSE Finance Corp File Number: 333-183380-01