X0306 4 2021-02-17 0000916076 MARTIN MARIETTA MATERIALS INC MLM 0001373147 Nye C Howard MARTIN MARIETTA MATERIALS, INC. 2710 WYCLIFF ROAD RALEIGH NC 27607 1 1 Chairman, Pres & CEO Common Stock 2021-02-17 4 A 0 19960 0 A 101729 D Common Stock 2021-02-17 4 F 0 8921 325.30 D 92808 D Common Stock 2021-02-17 4 A 0 9601 0 A 102409 D Common Stock 2021-02-17 4 A 0 6341 260.24 A 108750 D Common Stock 85400 I By Charles Howard Nye Irrevocable Trust Represents the settlement of performance share units into common stock that were granted under the Martin Marietta Amended and Restated Stock Based Award Plan on February 22, 2018. The ultimate amount of shares to be received under the grant depended on the achievement of performance goals during a three-year performance period from January 1, 2018 through December 31, 2020. On February 17, 2021, Martin Marietta's Management Development and Compensation Committee certified the attainment of the applicable performance goals and approved the settlement of the PSU grant. The shares underlying the PSUs vested on December 31, 2020. Restricted stock unit award granted under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan, which award vests pro rata in equal installments over three years from the date of grant. /s/ Roselyn R. Bar, attorney-in-fact 2021-02-19