GMS Investor Presentation Deck

GMS-FY2023 Highlights $5.3B FY23 Net Sales Up 15% $333M Up 146% FY23 Net Income Up 22% $441.7M $389.1M FY23 Cash from FY23 Free Cash Operations Flow* Up 181% Despite a pullback in single-family demand and lower steel prices, GMS delivered solid results for Q423 with year-over-year increases in net sales and Adjusted EBITDA*. *For a reconciliation of Adjusted EBITDA or Free Cash Flow to the most directly comparable GAAP metrics, see Appendix. Unless indicated otherwise, comparisons are to full year fiscal 2022. $665.7M FY23 Adj. EBITDA* Up 17% 6.2% FY23 Net Income Margin Up 30 bps 12.5% FY23 Adj. EBITDA Margin* Up 30 bps Record Full Year Results $ millions $1,858 7.4% $2,319 8.1% $2,511 7.9% $3,116 $3,241 $3,299 9.5% 9.7% 9.2% www www P120 Www. $5,329 $4,635 12.5% 12.2% FY-16 FY-17 FY-18 FY-19 FY-20 FY-21 FY-22 FY-23 Net Sales Adj. EBITDA Margin* CD

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