Federman & Sherwood Announces That a Securities Class Action Lawsuit Was Filed Against Willbros Group, Inc. (NYSE:WG) OKLAHOMA CITY, May 21 /PRNewswire/ -- On May 18, 2005, a class action lawsuit was filed in the United States District Court for the Southern District of Texas against Willbros Group, Inc. The complaint alleges violations of federal securities laws, Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Securities and Exchange Commission Rule 10b-5, including allegations that the defendants issued a series of material misrepresentations to the market which had the effect of artificially inflating the market price of Willbros Group, Inc.'s stock. The class period is from May 6, 2002 through May 16, 2005. Plaintiff seeks to recover damages on behalf of the Class. If you are a member of the Class as described above, you may move the Court no later than July 18, 2005, to serve as a lead plaintiff for the Class. However, in order to do so, you must meet certain legal requirements pursuant to the Private Securities Litigation Reform Act of 1995. If you wish to discuss this action, participate in this suit, or have any questions or concerns regarding this notice, or preservation of your rights, please contact: William B. Federman FEDERMAN & SHERWOOD 120 N. Robinson, Suite 2720 Oklahoma City, OK 73102 (405) 235-1560/FAX: (405) 239-2112 mail to: http://www.federmanlaw.com/ DATASOURCE: Federman & Sherwood CONTACT: William B. Federman for Federman & Sherwood, +1-405-235-1560, FAX: +1-405-239-2112, e-mail: Web site: http://www.federmanlaw.com/

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