Williams Partners Announces Redemption of 4.875% Senior Notes due 2023

Williams Partners L.P. (NYSE: WPZ) and ACMP Finance Corp. (collectively, the “Issuers”) announced today that they have issued a notice of redemption (the “Notice of Redemption”) to holders of the Issuers’ 4.875% Senior Notes due 2023 (the “Notes”), stating that the Issuers will redeem all of the outstanding Notes for cash on July 3, 2017 (the “Redemption Date”) at a redemption price equal to the sum of the principal amount of the Notes plus the excess, if any, of (a) present value at such time of (i) the redemption price of such Note at December 15, 2017 plus (ii) any required interest payments due on such Note through December 15, 2017 (except for currently accrued and unpaid interest), computed using a discount rate equal to the Treasury Rate (as defined in the indenture governing the Notes (the “Indenture”)) plus 50 basis points, discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months), over (b) the principal amount of such Note, plus accrued and unpaid interest to the Redemption Date. The Issuers will calculate the Treasury Rate no later than the second Business Day (as defined in the Indenture) preceding the Redemption Date.

Additional information concerning the terms and conditions of the redemption are fully described in the Notice of Redemption. Beneficial holders with any questions about the redemption should contact their respective brokerage firm or financial institution.

This press release is for informational purposes only and does not constitute an offer to purchase the Notes or any other securities.

About Williams Partners

Williams Partners 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. 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, heating and industrial use. Williams Partners’ operations touch approximately 30 percent of U.S. natural gas. Tulsa, Okla.-based Williams (NYSE: WMB), a premier provider of large-scale U.S. natural gas infrastructure, owns approximately 74 percent of Williams Partners.

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. Additional information about issues that could lead to material changes in performance is contained in the partnership’s annual and quarterly reports filed with the Securities and Exchange Commission.

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