That amount includes 3,225,000 common units purchased pursuant to the full exercise of the underwriter's option to purchase additional common units.

Williams Partners plans to use the net proceeds from the offering to repay amounts outstanding under the partnership's commercial paper program, to fund capital expenditures and for general partnership purposes.

Williams Partners expects that the completion of this transaction satisfies its planned 2013 equity financing needs and, as a result, the partnership does not intend to issue any additional equity through the balance of 2013.

About Williams Partners L.P.

Williams Partners L.P. is a leading diversified master limited partnership focused on natural gas transportation; gathering, treating, and processing; storage; natural gas liquid (NGL) fractionation; and oil transportation. The partnership owns interests in three major interstate natural gas pipelines that, combined, deliver 14 percent of the natural gas consumed in the United States.

Williams Partners