Q1 2022 & FY 2021 Results

D ALBERTA #1 MT #2 WY UT no Larger sales Mid sales Lower sales #3 ND MN #1 SD nee IA NE WI GCC REGIONAL LEADER IN U.S. MID-CONTINENT MARKETS WELL-POSITIONED TO CAPTURE U.S. GROWTH AND CONSTRUCTION INDUSTRY RECOVERY Leadership position in 16 contiguous states CO, MN, MT, ND, NM, SD, UT and W.TX are our core markets, with 88% of U.S. sales CO معي #2 KS #1 OK mm NM W TX #1 E TX Samalayuca and Juarez plants in Chihuahua can supplement the U.S. market with 0.5-0.7 mmt No other producer competes with GCC across all our markets Diversified regional economies with low unemployment, offering clear upside to U.S. construction recovery Pricing upswing since 2013 • Limited prospects for greenfield capacity expansion . Well-protected from seaborne imports Rapid City, SD plant expansion (+ 0.4 MMT) increased U.S. cement capacity to 3.5 MMT per year (finished 4Q18) Trident, MT cement plant acquisition (June 2018) Coal mine Cement plant # Concrete ✓ Cement terminals Market position in each state 9

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