GMS Results Presentation Deck

Q4 Fiscal 2023 Sales Highlights Inconsistent fundamentals with strong levels of multi-family demand, signs of a recovering commercial environment with softness in single-family and office. Resilient Wallboard, Ceilings and Complementary Products pricing but with deflationary trends in Steel Framing. $1.3B Q423 Net Sales Per Day Net Sales 2.8% Total U.S. Residential Sales Wallboard Per Day Net Sales Q4 23 Q4 22 $ 8.6 $ 7.7 $ 2.5 $ 2.3 Steel Framing $ 3.6 $ 4.3 Complementary Products $ 6.0 $5.8 Ceilings $ 20.7 $ 20.1 GMS GYPSUM MANAGEMENT & SUPPLY, INC. Up 5.8% Change 12.7% 5.9% -17.9% 4.0% 2.8% U.S. Commercial Sales Up 1.2% Per Day Organic Sales Q4 22 Change $ 7.7 13.1% $ 2.3 5.4% $4.3 -17.8% $5.9 $ 5.8 1.5% $20.7 $ 20.1 2.2% Q4 23 $ 8.7 $ 2.5 $ 3.6 Per Day Organic Growth Volume Price/Mix/Fx -2.5% -1.0% 6.4% 15.7% 6.4% -24.2% U.S. Wallboard Volume For GMS Mutli-Family - Up 27.9% Commercial - Up 7.3% Single-Family - Down 16.6% 5

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