Williams Partners Prices $800 Million of Senior Notes

TULSA, Okla.–(BUSINESS WIRE)–Williams Partners L.P. (NYSE: WPZ) (“Williams Partners”) today announced
that it has priced a public offering of $800 million of its 4.85 percent
Senior Notes due 2048 at a price of 99.515 percent of par. The expected
settlement date for the offering is March 5, 2018, subject to customary
closing conditions.

Williams Partners intends to use the net proceeds of the offering for
general partnership purposes, including repayment of its $750 million
aggregate principal amount of 4.875% Senior Notes due 2024 or other of
its outstanding indebtedness.

Citigroup, Morgan Stanley and MUFG are acting as joint book-running
managers for the offering.

This news release is neither an offer to sell nor a solicitation of an
offer to buy any of these securities and shall not constitute an offer,
solicitation or sale in any jurisdiction in which such offer,
solicitation or sale is unlawful.

An automatic shelf registration statement relating to the notes was
previously filed with the Securities and Exchange Commission (the “SEC”)
and became effective upon filing. Before you invest, you should read the
prospectus in the registration statement and other documents Williams
Partners has filed with the SEC for more complete information about
Williams Partners and the offering. A copy of the prospectus supplement
and prospectus relating to the offering may be obtained on the SEC
website at www.sec.gov
or from any of the underwriters including:

Citigroup Global Markets Inc.
c/o Broadridge Financial Solutions
1155
Long Island Avenue
Edgewood, NY 11717
Toll free: (800) 831-9146

Morgan Stanley & Co. LLC
Attn: Prospectus Department
180
Varick Street, 2nd Floor
New York, NY 10014

MUFG Securities Americas Inc.
1221 Avenue of the Americas, 6th Floor
New
York, NY 10020
Attention: Capital Markets Group
Telephone:
877-649-6848

About Williams Partners

Williams Partners (NYSE: WPZ) is an industry-leading, large-cap natural
gas infrastructure master limited partnership with operations across the
natural gas value chain including gathering, processing and interstate
transportation of natural gas and natural gas liquids. With major
positions in top U.S. supply basins, 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 connecting U.S. natural gas and natural gas
products to growing demand for cleaner fuel and feedstocks, 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:
Keith Isbell,
918-573-7308
or
Investor Contact:
Brett Krieg,
918-573-4614