GMS Investor Conference Presentation Deck

Q1 2024 Net Sales ($ in millions) (Unaudited) Organic (1) Acquisitions Fx Impact Total Net Sales Wallboard Ceilings Steel Framing Complementary Products Total Net Sales GMS GYPSUM MANAGEMENT & SUPPLY, INC. Fiscal Q1 FY24 1,372.7 44.2 (7.2) 1,409.6 571.4 175.2 236.8 FY23 $ 1,359.6 $ 1,359.6 $ 521.6 167.3 274.9 426.2 395.8 1,409.6 $ 1,359.6 Variance Reported Organic 3.7% 9.6% 4.7% (13.9%) 7.7% 3.7% (1) 1.0% 9.3% 2.0% (15.0%) 0.7% 1.0% 1. Organic net sales growth calculation excludes net sales of acquired businesses until first anniversary of acquisition date and impact of foreign currency translation. 20

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