X0306 4 2020-05-21 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 2020-05-21 4 M 0 10000 69.12 A 176363 D Common Stock 2020-05-21 4 S 0 6645 177.6181 D 169718 D Stock Options (Right to Buy) 69.12 2020-05-21 4 M 0 10000 0 D 2020-05-24 Common Stock 10000 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.12 to $178.41, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. Non-qualified stock option award granted under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan. Options become exercisable in four equal annual installments commencing one year from the date of grant. /s/ Roselyn R. Bar, attorney-in-fact 2020-05-22