RALEIGH, N.C., Aug 19, 2010 (BUSINESS WIRE) -- Anne H. Lloyd, Executive Vice President, Chief Financial Officer and Treasurer of Martin Marietta Materials, Inc. (NYSE:MLM), today announced that the Board of Directors has declared a regular quarterly cash dividend of $0.40 (forty cents) per share on the Corporation's common stock. This dividend, which represents a cash dividend of $1.60 per share on an annualized basis, is payable September 30, 2010, to shareholders of record at the close of business on September 1, 2010.

Martin Marietta Materials is the nation's second largest producer of construction aggregates and a producer of magnesia-based chemicals and dolomitic lime. For more information about Martin Marietta Materials, refer to the Corporation's Web site at www.martinmarietta.com.

MLM-D

SOURCE: Martin Marietta Materials, Inc.

Martin Marietta Materials, Inc.
Anne Lloyd
Executive Vice President, Chief Financial Officer and Treasurer
919-783-4660
www.martinmarietta.com

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