GMS Results Presentation Deck

Attractive Capital Structure Supports Strategic Priorities $118.1 M $102.1M Q224 Cash from Operations Improved 10% YOY Substantial Liquidity $76.5 million of cash on hand and $823.7 million available under our revolving credit facility. Expanded Share Repurchase Authorization Q224 Free Cash Flow 1 Expanded repurchase authorization up to $250 million approved in October; $241.3 million of repurchase authorization remaining at 10/31/23 GMS GYPSUM MANAGEMENT & SUPPLY, INC. 3. 4. 5. Improved 6% YOY Debt/Lease Payments 14% Capital Expenditures 15% Share Repurchases 18% 3-Year Historical Use of Cash4 Acquisitions 53% For Fiscal Years 2021, 2022 and 2023 LTM Net Debt / PF Adjusted EBITDA² 1.6x I 10/31/2022 1/31/2023 4/30/2023 7/31/2023 10/31/2023 $ in millions $25 1.6x FY24 $45 1.4x Debt³ Maturity Schedule FY25 $38 $32 FY26 1. For a reconciliation of free cash flow to cash used in operating activities, the most directly comparable GAAP metric, see Appendix. 2. For detail, including a reconciliation of Pro Forma Adjusted EBITDA to net income, the most directly comparable GAAP metric, see Appendix. Debt includes First Lien Term Loan, ABL Facility, Senior Notes, Finance Leases & Installment Notes. Includes cash used for Capital Expenditures, Acquisitions, Share Repurchases, Payments on Principal on Long-Term Debt and Payments on Principal on Finance Lease Obligations for fiscal years 2021, 2022 and 2023 Balance sheet, capital structure and share repurchase authorization references are as of 10/31/23. FY27 1.5x $106 FY28 1.5x $840 Thereafter 7

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