Martin Marietta Announces Time Change for First Quarter 2018 Earnings Conference Call

RALEIGH, N.C., April 30, 2018 -- Martin Marietta Materials, Inc. (NYSE:MLM) today announced that its online Web simulcast of its first quarter 2018 earnings conference call will now begin at 10:00 a.m. Eastern Time on Tuesday, May 8, 2018.  The change is being made to accommodate the investor community in light of other building materials companies hosting conference calls during the originally scheduled time.

The live broadcast of Martin Marietta’s conference call will begin at 10:00 a.m. Eastern Time on May 8, 2018.  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.

For those investors without online web access, the conference call may also be accessed by calling 970‑315‑0423, confirmation number 5287057. A five-day telephonic replay will be available by dialing 404‑537‑3406 and entering 5287057 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 27 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.

Investor Contact:  
Suzanne Osberg
Vice President, Investor Relations
(919) 783-4691
[email protected]

MLM-E.