Keith Meister, Eric Mandelblatt Step Down from Williams Companies (WMB) Board

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Page 9 of 12 – SEC Filing

This Amendment No. 7 supplements the information set forth in the Schedule 13D filed by Corvex Management
LP, Keith Meister, Soroban Master Fund LP, Soroban Capital Partners LLC, and Eric W. Mandelblatt with the United States Securities and Exchange Commission (the SEC) on December 16, 2013, as amended from time to time (as amended, the
Schedule 13D) relating to the shares of Common Stock, par value $1.00 per share (the Shares) of The Williams Companies, Inc., a Delaware corporation (the Issuer). Capitalized terms used but not defined herein
shall have the meanings ascribed to them in the Schedule 13D.

The information set forth in response to each separate Item below shall be deemed to be a
response to all Items where such information is relevant. The Schedule 13D is supplementally amended as follows.

Item 2. Identity and Background.

This statement on Schedule 13D is filed jointly by the following entities and
persons, all of whom are together referred to herein as the Reporting Persons:

(a) Corvex Management LP, a Delaware limited partnership
(Corvex), and Keith Meister, a U.S. citizen (collectively, the Corvex Persons). This statement relates to Shares held for the account of certain private investment funds for which Corvex acts as investment adviser, including
Corvex Master Fund, LP, a Cayman Islands limited partnership, the general partner of which is controlled by Mr. Meister (collectively, the Corvex Funds). The general partner of Corvex is controlled by Mr. Meister. The principal
business of Corvex is serving as the investment adviser of the Corvex Funds, whose principal business is investing in securities. Mr. Meisters principal occupation is serving as the Managing Partner of Corvex. The principal business
address of each of Corvex and Mr. Meister is 667 Madison Avenue, New York, NY 10065.

(b) Soroban Master Fund LP, a Cayman Islands exempted limited
partnership (SMF Fund), Soroban Capital GP LLC, a Delaware limited liability company (SCGP LLC), Soroban Capital Partners LP, a Delaware limited partnership (formerly known as Soroban Capital Partners LLC) (SCP
LP), Soroban Capital Partners GP LLC, a Delaware limited liability company (SCP GP) and Eric W. Mandelblatt, a U.S. citizen (collectively, the Soroban Persons). This statement relates to Shares held for the account of
SMF Fund, a private investment fund for which SCP LP acts as investment manager. SCGP LLC is the general partner of SMF Fund and is controlled by Mr. Mandelblatt through his role as Managing Partner of SCGP LLC. SCP LP is controlled by
Mr. Mandelblatt through his role as Managing Partner of SCP GP, the general partner SCP LP. The principal business of SCP LP is serving as the investment manager of SMF Fund, whose principal business is investing in securities. The principal
business of SCGP is serving as the general partner of SMF Fund, and the principal business of SCP GP is serving as the general partner of SCP LP. The principal business of Mr. Mandelblatt is serving as Managing Partner of SCGP LLC and Managing
Partner of SCP GP. The principal business address of SMF Fund is Gardenia Court, Suite 3307, 45 Market Street, Camana Bay, Grand Cayman KY1-1103, Cayman Islands and the principal business address of SCGP LLC, SCP LP, SCP GP and Mr. Mandelblatt
is 444 Madison Avenue, 21st Floor, New York, NY 10022.

A joint filing agreement of the Corvex Persons and the Soroban Persons is attached hereto as
Exhibit 1.

During the last five years, none of the Reporting Persons has been convicted in a criminal proceeding (excluding traffic violations or
similar misdemeanors) or has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of,
or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Information
contained herein concerning each Corvex Person has been provided by each such Corvex Person and the Soroban Persons assume no responsibility for such information. Information contained herein concerning each Soroban Person has been provided by each
such Soroban Person and the Corvex Persons assume no responsibility for such information.

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