RALEIGH, N.C., July 20, 2018 (GLOBE NEWSWIRE) -- Martin Marietta Materials, Inc. (NYSE:MLM) today announced that it will provide an online Web simulcast of its second quarter 2018 earnings conference call on Thursday, July 26, 2018. The Company will release results for the quarter ended June 30, 2018, that morning before the market opens. The live broadcast of Martin Marietta's conference call will begin at 10:00 a.m. Eastern Time on July 26, 2018.