X0203 0000876661 NEW YORK STOCK EXCHANGE LLC 1407463 Pioneer Southwest Energy Partners L.P. 001-34032

5205 N. O'Connor Blvd., Suite 200 Irving TX TEXAS 75039

(972) 444-9001 Common Units Representing Limited Partner Interests 17 CFR 240.12d2-2(a)(3) Edwin Mecabe Director 2013-12-20