Williams Announces Closing of Common Stock Public Offering, Exercise in Full of Underwriters’ Option

  Williams Announces Closing of Common Stock Public Offering, Exercise in Full
  of Underwriters’ Option

Business Wire

TULSA, Okla. -- December 18, 2012

Williams (NYSE:WMB) announced today that its previously announced public
offering of 46,500,000 shares of its common stock priced at $31.00 per share
has closed. In addition, the underwriters elected to exercise in full their
option to purchase an additional 6,975,000 shares of the company’s common
stock.

Williams intends to use the net proceeds from the offering to finance a
portion of its investments in Access Midstream Partners GP, L.L.C. and Access
Midstream Partners, L.P. that were previously announced on Dec. 11, 2012.

Citigroup, Barclays, and UBS Investment Bank acted as joint book-running
managers.

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. A copy of the prospectus supplement and related base prospectus may
be obtained on the SEC website at www.sec.gov or from any of the underwriters,
including:

Citigroup
c/o Broadridge Financial Solutions
1155 Long Island Avenue
Edgewood, NY 11717
Phone: 800-831-9146
Email: batprospectusdept@citi.com

Barclays
c/o Broadridge Financial Solutions
1155 Long Island Avenue
Edgewood, NY 11717
Phone: 888-603-5847
E-mail: Barclaysprospectus@broadridge.com

UBS Investment Bank
Attention: Prospectus Department
299 Park Avenue
New York, NY 10171
Phone: 888-827-7275

Portions of this document may constitute "forward-looking statements" as
defined by federal law. Although the company 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 company's annual reports filed with
the Securities and Exchange Commission.

Contact:

Williams
Media Contact:
Jeff Pounds, 918-573-3332
or
Investor Contacts:
John Porter, 918-573-0797
or
Sharna Reingold, 918-573-2078