CB&I (NYSE: CBI) announced today that the waiting period for U.S. antitrust review under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, relating to the previously announced acquisition of The Shaw Group (NYSE: SHAW) by CB&I, expired on Wednesday, September 19, 2012. Expiration of the waiting period satisfies a condition to the closing of the transaction. The transaction remains subject to other customary closing conditions, including, among others, certain additional regulatory clearances and approval by the shareholders of CB&I and Shaw. ABOUT CB&ICB&I (NYSE: CBI) engineers and constructs some of the world’s largest energy infrastructure projects. With premier process technology, proven EPC expertise, and unrivaled storage tank experience, CB&I executes projects from concept to completion. Safely. Reliably. Globally. For more information, visit www.CBI.com. ABOUT SHAW The Shaw Group (NYSE: SHAW) is a leading global provider of engineering, construction, technology, fabrication, remediation and support services for clients in the energy, chemicals, environmental, infrastructure and emergency response industries. A Fortune 500 company with fiscal year 2011 annual revenues of $5.9 billion, Shaw has approximately 25,000 employees around the world and is a power sector industry leader according to Engineering News-Record’s list of Top 500 Design Firms. For more information, please visit Shaw’s website at www.shawgrp.com. Important Information For Investors And Shareholders This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval. In connection with the proposed transaction, Chicago Bridge & Iron Company N.V. (“CB&I”) has filed with the Securities and Exchange Commission (“SEC”) a preliminary registration statement on Form S-4 that includes a joint proxy statement of The Shaw Group Inc. (“Shaw”) and CB&I that also constitutes a prospectus of CB&I. CB&I and Shaw also plan to file other documents with the SEC regarding the proposed transaction. A definitive joint proxy statement/prospectus will be mailed to shareholders of Shaw and CB&I. INVESTORS AND SECURITY HOLDERS OF SHAW AND CB&I ARE URGED TO READ THE DEFINITIVE JOINT PROXY STATEMENT/PROSPECTUS (INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) AND OTHER DOCUMENTS THAT WILL BE FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and shareholders will be able to obtain free copies of the definitive joint proxy statement/prospectus and other relevant documents filed by CB&I and Shaw, once such documents are filed with the SEC, through the website maintained by the SEC at http://www.sec.gov. Copies of the documents filed with the SEC by CB&I will be available free of charge on CB&I’s internet website at www.cbi.com under the tab “Investor Relations” and then under the tab “SEC Documents” or by contacting CB&I’s Investor Relations Department at 832-513-1200. Copies of the documents filed with the SEC by Shaw will be available free of charge on Shaw’s internet website at www.Shawgrp.com under the tab “Investor Relations” and then under the tab “SEC Filings” or by contacting Shaw’s Investor Relations Department at 225-987-7372. Participants in the Solicitation CB&I, Shaw, and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the shareholders of Shaw and CB&I in connection with the proposed transaction. Information about the directors and executive officers of Shaw is set forth in Shaw’s proxy statement for its 2011 annual meeting of shareholders, which was filed with the SEC on December 15, 2011. Information about the directors and executive officers of CB&I is set forth in CB&I’s proxy statement for its 2012 annual meeting of shareholders, which was filed with the SEC on March 22, 2012. Other information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, is set forth in the preliminary joint proxy statement/prospectus filed with the SEC on September 18, 2012 and will be contained in other relevant materials to be filed with the SEC in connection with the proposed transaction, including the definitive joint proxy statement/prospectus, when they become available.