RALEIGH, N.C., Jan 31, 2007 (BUSINESS WIRE) -- Martin Marietta Materials, Inc. (NYSE:MLM) today announced that it will provide an online Web simulcast of its year-end 2006 earnings conference call on Thursday, February 8, 2007. The Company will release results for the fourth quarter and year ended December 31, 2006, that morning before the market opens.

The live broadcast of Martin Marietta Materials' conference call will begin at 2:00 p.m. Eastern Time on February 8, 2007. An online replay will be available approximately two hours following the conclusion of the live broadcast and will continue for one year. A link to these events is available at the Company's website: www.martinmarietta.com.

For those investors without online web access, the conference call may also be accessed by calling 913-981-5522, confirmation number 3448481.

Martin Marietta is the nation's second largest producer of construction aggregates, a leading producer of magnesia-based chemical products and is developing structural composites products for use in a wide variety of industries.

SOURCE: Martin Marietta Materials, Inc.

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

Copyright Business Wire 2007

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