Additional Information and Where to Find ItIn connection with the proposed transaction between Martin Marietta and TXI, Martin Marietta and TXI intend to file relevant materials with the Securities and Exchange Commission, including a Martin Marietta registration statement on Form S-4 that will include a joint proxy statement of Martin Marietta and TXI that also constitutes a prospectus of Martin Marietta. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT MARTIN MARIETTA, TXI AND THE PROPOSED TRANSACTION. The joint proxy statement/prospectus and other documents relating to the proposed transaction (when they are available) can be obtained free of charge from the SEC’s website at www.sec.gov. These documents (when they are available) can also be obtained free of charge from Martin Marietta upon written request to the Corporate Secretary at Martin Marietta Materials, Inc., 2710 Wycliff Road, Raleigh, NC 27607, telephone number (919) 783-4540 or from Martin Marietta’s website, http://ir.martinmarietta.com or from TXI upon written request to TXI at Investor Relations, Texas Industries, Inc., 1503 LBJ Freeway, Suite 400, Dallas, Texas 75234, telephone number (972) 647-6700 or from TXI’s website, http://investorrelations.txi.com. Participants in Solicitation This communication is not a solicitation of a proxy from any investor or securityholder. However, Martin Marietta, TXI and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies in connection with the proposed transaction under the rules of the SEC. Information regarding Martin Marietta’s directors and executive officers may be found in its Annual Report for the year ended December 31, 2012 on Form 10-K filed with the SEC on February 2, 2013 and the definitive proxy statement relating to its 2013 Annual Meeting of Shareholders filed with the SEC on April 16, 2013. Information regarding TXI’s directors and executive officers may be found in its Annual Report for the year ended May 31, 2013 on Form 10-K filed with the SEC on July 22, 2013 and the definitive proxy statement relating to its 2013 Annual Meeting of Shareholders filed with the SEC on August 23, 2013. These documents can be obtained free of charge from the sources indicated above. Additional information regarding the interests of these participants will also be included in the joint proxy statement/prospectus when it becomes available.