Williams (NYSE: WMB) announced today that it intends to commence an underwritten public offering of 46,500,000 shares of its common stock. The shares will be offered by Williams pursuant to an effective shelf registration statement on file with the Securities and Exchange Commission. 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 December 11, 2012. The underwriters have been granted a 30-day option to purchase up to an additional 6,975,000 shares of common stock. Citigroup, Barclays, and UBS Investment Bank are acting 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 preliminary prospectus supplement and related base prospectus may be obtained on the SEC website at www.sec.gov or from any of the underwriters, including: Citigroupc/o Broadridge Financial Solutions1155 Long Island AvenueEdgewood, NY 11717Phone: 800-831-9146Email: firstname.lastname@example.org Barclaysc/o Broadridge Financial Solutions1155 Long Island AvenueEdgewood, NY 11717Phone: 888-603-5847E-mail: Barclaysprospectus@broadridge.com UBS Investment BankAttention: Prospectus Department299 Park AvenueNew York, NY 10171Phone: 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 partnership's annual reports filed with the Securities and Exchange Commission.