GMS Results Presentation Deck

Deflationary Steel Pricing Impacts Profitability Cost Containment and Efficiency Gains Drive Favorable SG&A Results Gross Profit & Gross Margin Gross Profit up year-over-year and Gross Margin down due to deflationary steel pricing ($ mm) $464.5 32.5% Fiscal Q2 2023 Gross Profit GMS GYPSUM MANAGEMENT & SUPPLY, INC. $458.6 32.3% Fiscal Q2 2024 Gross Margin SG&A SG&A and Adj. SG&A expenses were up YOY due to the costs. related to recently acquired businesses & greenfields and more robust multi-family and commercial volumes; Adj. SG&A percent of sales leverage was primarily negatively impacted by steel price deflation. ($ mm) $270.9 18.9% Fiscal Q2 2023 Adj. SG&A $293.0 20.6% Fiscal Q2 2024 Adj. SG&A as % of Sales Net Income & Adj. EBITDA ¹ Net income decreased 21.5% YOY to $81.0M. Included a 16.7% increase in interest expense. Adjusted EBITDA of $167.6 million with 11.8% Adjusted EBITDA margin. ($ mm) $195.5 13.7% Fiscal Q2 2023 1 Adj. EBITDA $167.6 ¹For a reconciliation of Adjusted SG&A, Adjusted Net Income, Adjusted EBITDA and Adjusted EBITDA Margin to the most directly comparable GAAP metrics, see Appendix. 11.8% Fiscal Q2 2024 1 -Adj. EBITDA Margin 6

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