Williams, Williams Partners Analyst Day Set for May 13

Williams (NYSE: WMB) is scheduled to host its annual Analyst Day event May 13.

During the event, Williams’ management will give in-depth presentations covering all of Williams’ and Williams Partners L.P.’s (NYSE: WPZ) energy infrastructure business. The event is scheduled from 8:30 a.m. to approximately 2:30 p.m. EDT.

On the day of the event, www.williams.com will feature presentation files for download along with a link to a live webcast. A replay of the Analyst Day webcast will be available for two weeks following the event.

About Williams & Williams Partners

Williams (NYSE: WMB) is a premier provider of large-scale infrastructure to connect North American natural gas and natural gas products to growing demand for cleaner fuel and feedstocks. Headquartered in Tulsa, Okla., Williams owns approximately 60 percent of Williams Partners L.P. (NYSE: WPZ), including the general-partner interest. Williams Partners is an industry-leading, large-cap master limited partnership with operations across the natural gas value chain from gathering, processing and interstate transportation of natural gas and natural gas liquids to petchem production of ethylene, propylene and other olefins. With major positions in top U.S. supply basins and also in Canada, 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, home heating and industrial use. Williams Partners’ operations touch approximately 30 percent of U.S. natural gas. www.williams.com

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.

WilliamsMedia Contact:Tom Droege, 918-573-4034orInvestor Contacts:John Porter, 918-573-0797orBrett Krieg, 918-573-4614