Martin Marietta Announces First-Quarter 2021 Earnings Conference Call

b'RALEIGH, N.C., April 19, 2021 (GLOBE NEWSWIRE) -- Martin Marietta Materials, Inc. (NYSE:MLM) (\xe2\x80\x9cMartin Marietta\xe2\x80\x9d or the \xe2\x80\x9cCompany\xe2\x80\x9d) today announced that it will provide an online Web simulcast of its first-quarter 2021 earnings conference call on Tuesday, May 4, 2021.