X0303 4 2010-08-31 0 0001324518 Williams Partners L.P. WPZ 0001216708 WRIGHT PHILLIP D ONE WILLIAMS CENTER TULSA OK 74172 1 1 0 0 Senior Vice President Common units representing limited partnership interest 2010-08-31 4 J 0 7659 A 12084 D Acquired pursuant to the Agreement and Plan of Merger, dated as of May 24, 2010, by and among the issuer, Williams Partners GP LLC, Williams Partners Operating LLC, WPZ Operating Company Merger Sub LLC, Williams Pipeline Partners L.P. ("WMZ") and Williams Pipeline GP LLC (the "Merger Agreement"). The reporting person received the common units in exchange for 10,100 common units of WMZ pursuant to the Merger Agreement, and received cash for any fractional units. On August 31, 2010, the effective date of the merger, the New York Stock Exchange ("NYSE") closing price of the issuer's common units was $42.11, and the NYSE closing price of the WMZ common units was $31.86. Beth A. Burkholder, Attorney-in-Fact for Mr. Phillip D. Wright 2010-09-02