Martin Marietta Materials
July 20, 2017

Martin Marietta Materials, Inc. to Broadcast Second Quarter 2017 Conference Call Live on the Internet

RALEIGH, N.C., July 20, 2017 (GLOBE NEWSWIRE) -- Martin Marietta Materials, Inc. (NYSE:MLM) today announced that it will provide an online Web simulcast of its second quarter 2017 earnings conference call on Tuesday, August 1, 2017. The Company will release results for the second quarter ended June 30, 2017, that morning before the market opens.

The live broadcast of Martin Marietta Materials' conference call will begin at 11:00 a.m. Eastern Time on
August 1, 2017. An online replay of the live broadcast 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 58426317. A five-day telephonic replay will be available by dialing 404‑537‑3406 and entering 58426317 when prompted for the access code.

Martin Marietta, a member of the S&P 500 Index, is an American-based company and a leading supplier of building materials, including aggregates, cement, ready mixed concrete, and asphalt. Through a network of operations spanning 26 states, Canada, and The Bahamas, dedicated Martin Marietta teams supply the resources necessary for building the solid foundations on which our communities thrive. Martin Marietta's Magnesia Specialties business provides a full range of magnesium oxide, magnesium hydroxide and dolomitic lime products.  For more information, visit www.martinmarietta.com or www.magnesiaspecialties.com.

MLM-E.

Investor Contact:

Elisabeth L. Eisleben

Director, Investor Relations

(919) 510-4776

Elisabeth.Eisleben@martinmarietta.com

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Source: Martin Marietta Materials

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