Williams Partners Announces Cash Distribution

Williams Partners L.P. (WPZ) today announced a regular quarterly cash distribution of $0.85 per unit for its common unitholders.

The board of directors of the partnership’s general partner has approved the quarterly cash distribution, which is payable on May 14, 2015, to common unitholders of record at the close of business on May 7.

The cash distribution is consistent with the partnership’s distribution guidance for a total 2015 annual distribution of $3.40 per unit announced on Feb. 18.

First Quarter Financial Results to be Announced April 29

Williams Partners plans to report its first-quarter 2015 financial results after the market closes on Wednesday, April 29.

The partnership plans to host a conference call and live webcast on Thursday, April 30, at 9:30 a.m. EDT. A limited number of phone lines will be available at (800) 475-3716. International callers should dial (719) 457-2660. A link to the webcast, as well as replays of the webcast in both streaming and downloadable podcast formats, will be available for two weeks following the event atwww.williams.com.

This announcement is intended to be a qualified notice to nominees under Treasury Regulation Section 1.1446-4(b)(4) and (d). The partnership’s distributions to foreign investors, which are attributable to income that is effectively connected with a U.S. trade or business, are subject to withholding under U.S. law. In light of the uncertainty at the time of making distributions regarding the portion of any distribution that is attributable to income that is not effectively connected with a U.S. trade or business, we treat all of our distributions as attributable to U.S. operations. Accordingly, the entire amount of the partnership’s distributions to foreign investors is subject to federal income tax withholding at the highest effective tax rate. Nominees, and not Williams Partners L.P., are treated as the withholding agents responsible for withholding on the distributions received by them on behalf of foreign investors.

About Williams Partners

Williams Partners (WPZ) is an industry-leading, large-cap natural gas infrastructure master limited partnership with a strong growth outlook and major positions in key U.S. supply basins and also in Canada. Williams Partners has operations across the natural gas value chain from gathering, processing and interstate transportation of natural gas and natural gas liquids to petchem production of ethylene, propylene and other olefins. Williams Partners owns and operates more than 33,000 miles of pipelines system wide – including the nation’s largest volume and fastest growing pipeline – providing natural gas for clean-power generation, home heating and industrial use. Williams Partners’ operations touch approximately 30 percent of U.S. natural gas. Tulsa, Okla.-based Williams (WMB), a premier provider of large-scale North American natural gas infrastructure, owns 60 percent of Williams Partners, including the general-partner interest.www.williams.com

Portions of this document may constitute “forward-looking statements” as defined by federal law. Although the partnership believes any such statements are based on reasonable assumptions, there is no assurance that actual outcomes will not be materially different. Any such statements are made in reliance on the “safe harbor” protections provided under the Private Securities Reform Act of 1995. Additional information about issues that could lead to material changes in performance is contained in the partnership’s annual reports filed with the Securities and Exchange Commission.

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