Wallace Engineering-Constructural Consultants, P.C

Wallace Engineering-Structural Consultants, Inc

Washington Inn Inc. (okla.)

Washington Inn Limited Partnership (merged 12/27/91 Effective 12

Watt Properties Co

Westco International, Inc

Willbros Downstream, Llc

Willbros Engineers, Inc

Williams & Williams Marketing Services, Inc

Williams & Williams Marketing Services, Inc.

Williams Alaska Petroleum, Inc

Williams Communications Managed Services, Llc

Williams Communications, Inc

Williams Communications, Inc. (delaware)

Williams Energy Resources Llc

Williams Energy Ventures, Inc

Williams Flexible Generation, Llc

Williams Gas Marketing Company

Williams Gas Marketing, Inc

Williams Gas Marketing, Inc.