TULSA, Okla., April 19, 2011 /PRNewswire/ -- Williams (NYSE: WMB) announced today a revised schedule for announcing its first-quarter 2011 financial results.  The company now plans to release its results after the close of market on Wednesday, May 4.

The company's previous plan was to announce its results before the market opens on Thursday, May 5.  Williams is revising its schedule for releasing its financial results to give investors more time to review the information before the first-quarter live webcast.

The schedule for the live webcast is unchanged.  It is planned for Thursday, May 5 at 9:30 a.m. EDT.  Participants are encouraged to access the webcast at www.williams.com.   The slides for the webcast will be available for viewing, downloading and printing when the results are announced on May 4.

A limited number of phone lines also will be available at (888) 401-4685. International callers should dial (719) 457-2643. Replays of the first-quarter webcast in both streaming and downloadable podcast formats will be available for two weeks following the event at www.williams.com.

Williams expects to continue to release its quarterly financial results on the day prior to the live webcast with investors in future quarters.

About Williams (NYSE: WMB)

Williams is an integrated natural gas company focused on exploration and production, midstream gathering and processing, and interstate natural gas transportation primarily in the Rocky Mountains, Gulf Coast, Pacific Northwest, Eastern Seaboard and the Marcellus Shale in Pennsylvania. Most of the company's interstate gas pipeline and midstream assets are held through its 75-percent ownership interest (including the general-partner interest) in Williams Partners L.P. (NYSE: WPZ), a leading diversified master limited partnership.  More information is available at www.williams.com. Go to http://www.b2i.us/irpass.asp?BzID=630&to=ea&s=0 to join our e-mail list.

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.

SOURCE Williams