Investor Presentation - January 2019

1 AGGREGATES CONSUMPTION HAS ONLY MODESTLY REBOUNDED FROM THE GREAT RECESSION U.S. CONSTRUCTION AGGREGATES CONSUMPTION¹ Martin Marietta heritage aggregates volumes are MODESTLY ABOVE TROUGH LEVELS and REMAIN 10% BELOW MID-CYCLE DEMAND 3.4B TONS 2006 PEAK 2.2B TONS 2010 TROUGH 2.4B TONS 2017 Source: U.S. Geological Survey (Crushed Stone and Sand & Gravel) Investor Presentation - January 2019 Aggregates volumes (tons) 205M 2005 PEAK Martin Marietta 158M 27M Tons added via acquisitions since 2008 125M 5% HERITAGE GROWTH 131M from trough levels 2010 TROUGH Heritage Acquisitions 2017 26

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