Important Information

Important Information

Williams intends to file a proxy statement with the U.S. Securities and Exchange Commission (the “SEC”) with respect to the 2016 Annual Meeting. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ ANY SUCH PROXY STATEMENT, THE ACCOMPANYING WHITE PROXY CARD AND OTHER DOCUMENTS THAT HAVE BEEN OR MAY BE FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY AS THEY CONTAIN OR WILL CONTAIN IMPORTANT INFORMATION ABOUT THE 2016 ANNUAL MEETING. Investors and security holders should read the proxy statement carefully before making any voting or investment decisions. Investors and security holders may obtain free copies of these documents and other documents filed with the SEC by Williams through the website maintained by the SEC at http://www.sec.gov . Copies of the documents filed by Williams with the SEC will be available on Williams’ website at investor.williams.com.

Participants in the Solicitation

Williams and its directors, executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies in connection with the matters to be considered at Williams’ 2016 Annual Meeting. Information regarding the directors and officers of Williams is contained in Williams’ Annual Report on Form 10-K filed with the SEC on February 26, 2016 (as it may be amended from time to time). Additional information regarding the interests of such potential participants is or will be included in the proxy statement and other relevant documents filed with the SEC.