Investor Presentation - January 2019

MARTIN MARIETTA AT A GLANCE loa 8,800 + Employees - 300 + Aggregates Quarries, 2 Cement Plants 9 Asphalt Plants As of June 30, 2018 Investor Presentation - January 2019 12 Mg • U.S. based company and Martin Marietta Mines & Yards 144 Ready Mixed Concrete Plants 2 Magnesia Specialties Facilities · • • member of the S&P 500 Index Leading supplier of aggregates and heavy-side building materials used in infrastructure, nonresidential and residential construction projects (Building Materials business) Operations spanning 27 states, Canada and the Bahamas Producer of magnesia-based chemicals products and dolomitic lime (Magnesia Specialties business) 4

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