Williams Partners Announces Redemption of 4.875% Senior Notes due 2023

TULSA, Okla.–(BUSINESS WIRE)–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.

Contacts

Williams Partners L.P.
Media Contact:
Lance Latham,
918-573-9675
or
Investor Contacts:
John Porter,
918-573-0797
or
Brett Krieg, 918-573-4614