Investor Presentation

Decentralized, Materials-Based Model Local Leadership, Diversified End-Markets SUM is #1 market player across 50% of the platform markets served Estimated market share by platform BOXLEY CON AGG HAMM Mainland Sand & Gravelt ZA JANEDE TE PAKARTOTE CLEVEme weng ALLEYTON FK HALL CONSTRUCTION, LTD Cornyo & Sons Troy Vines, Inc. CONTINENTAL CEMENT Hinkle KILGORE COMPANIES West-Central, Virginia Columbia, Missouri Northeast Kansas Vancouver, B.C. West Houston Texas Northern Texas Wichita, Kansas Midland/Odessa, Texas Mississippi River Corridor Central, Kentucky Austin, Texas Sal Lake City, Utah Diversified Exposure Across Lines of Business, End-Market and Geography Adjusted EBITDA By Line of Business (FY16) Services 6% Products 33% Top 3 position Top 3 position Top 3 position Top 3 position Materials 61% Net Revenue By End-Market (FY16) Public 37% 4 Private 63% Top 2 position Top 2 position #1 position #1 position #1 position #1 position #1 position #1 position Net Revenue By Geography (FY16) All Other States 32% "Top 5" States 68% SUMMIT Materials

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