Additional Information and Where to Find ItIn connection with the proposed merger, Robbins & Myers filed a preliminary proxy statement with the SEC on August 31, 2012 and may file other relevant materials with the SEC as well. INVESTORS AND SECURITY HOLDERS ARE URGED TO CAREFULLY READ THE PROXY STATEMENT AND ANY OTHER MATERIALS REGARDING THE PROPOSED MERGER (INCLUDING THE FINAL PROXY STATEMENT) WHEN THEY BECOME AVAILABLE BECAUSE THEY CONTAIN AND WILL CONTAIN IMPORTANT INFORMATION ABOUT ROBBINS & MYERS AND THE PROPOSED MERGER. The final proxy statement will be mailed to Robbins & Myers shareholders. Investors and security holders may obtain a free copy of the proxy statement (when it is available) and other documents containing information about Robbins & Myers, without charge, at the SEC’s web site at www.sec.gov. Copies of Robbins & Myers’ SEC filings also may be obtained for free by directing a request to Robbins & Myers, Inc., 10586 Highway 75 North, Willis, Texas 77378, (936) 890-1064. Participants in the Solicitation Robbins &Myers, National Oilwell Varco, and certain of their respective directors and executive officers may be deemed, under SEC rules, to be participants in the solicitation of proxies from Robbins & Myers’ shareholders in connection with the proposed merger. Information about Robbins & Myers’ directors and executive officers and the special interests of these persons in connection with the proposed merger can be found in the preliminary proxy statement filed by Robbins & Myers with the SEC on August 31, 2012. Information about National Oilwell Varco’s directors and executive officers can be found in National Oilwell Varco’s Annual Report on Form 10-K for its fiscal year ended December 31, 2011, as filed with the SEC on February 23, 2012, and National Oilwell Varco’s proxy statement relating to its 2012 Annual Meeting of Shareholders, as filed with the SEC on April 5, 2012. These documents can be obtained, without charge, at the SEC’s website at www.sec.gov.