Investor Presentaiton

WHERE GCC FACES FRAGMENTED COMPETITION AND HAS A DIVERSIFIED BUSINESS MIX GCC MARKET POSITION AND COMPETITORS IN CORE MARKETS GCC market position GCC cement plant in state GCC COLORADO N. MEXICO N. DAKOTA S. DAKOTA W. TEXAS WYOMING MONTANA #2 #1 #3 #1 #1 #2 #1 * Refers to West Texas only Competitor in-state plant LHN, CX BZU, SRMG* EXP CRH Other principal competitors EXP LHN HEI, LHN CRH LHN, CRH ** U.S. 2023 SALES MIX Cement and mortar 73% O Ready-mix concrete 16% Other 10% U.S. 2023 PRODUCTION VOLUME BY CEMENT TYPE Gray cement, specialty and masonry 79% O Oil-well cement 21% Public 50% 15% of GCC's total volume 1Sales by segment, weighted GCC sales by state. PCA Winter forecast 2021 U.S. SECTORS¹ Aprox. 12 mmt of capacity in East and Central Texas Residential 27% Commercial Oil Rig/Well 16% 7% 10

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