GMS Results Presentation Deck

Consolidated GMS Expectations for Q2 FY24 and Full Year Fiscal 2024 Metric for Q2 FY24 Net Sales Gross Margin Adjusted EBITDA ¹ Metric for Full Year FY 24 Interest Expense Capital Expenditures Free Cash Flow ¹ Tax Rate² GMS GYPSUM MANAGEMENT & SUPPLY, INC. Q2 FY24 Expectation Down low single-digits primarily driven by steel price declines At or near long term average of 32% $160 million - $165 million Full Year FY24 Expectation ~$70 million ~$50 million ~ 50% - 60% of FY24 Adj. EBITDA¹ ~25.5% -26.0% ¹For a reconciliation of Adjusted EBITDA, Adjusted Net Income or Free Cash Flow to the most directly comparable GAAP metrics, see Appendix. 2Tax rate refers to the normalized cash tax rate excluding the impact of acquisition accounting and certain other deferred tax amounts. 9

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