RALEIGH, N.C., Jul 27, 2010 (BUSINESS WIRE) -- Martin Marietta Materials, Inc. (NYSE:MLM) today announced that it will provide an online Web simulcast of its second quarter 2010 earnings conference call on Tuesday, August 3, 2010. The Company will release results for the second quarter and six months ended June 30, 2010, 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 August 3, 2010. 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 970-315-0423, confirmation number 88075436. A seven-day telephonic replay will be available by dialing 706-645-9291 and entering 88075436 when prompted for the access code.

Martin Marietta Materials is the nation's second largest producer of construction aggregates and a producer of magnesia-based chemicals and dolomitic lime.

MLM-G

SOURCE: Martin Marietta Materials, Inc.

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

Copyright Business Wire 2010