PIONEER SOUTHWEST ENERGY PARTNERS L.P. Common Units Representing Limited Partner Interests Underwriting Agreement November 11, 2009Pioneer Southwest Energy Partners L.P. • November 13th, 2009 • Crude petroleum & natural gas • New York
Company FiledNovember 13th, 2009 Industry JurisdictionUBS Securities LLC Merrill Lynch, Pierce, Fenner & Smith Incorporated Citigroup Global Markets Inc. Wells Fargo Securities, LLC as Managing Underwriters c/o UBS Securities LLC 299 Park Avenue New York, New York 10171-0026