GMS Results Presentation Deck

Leverage Summary ($ mm) Cash and cash equivalents Revolving Credit Facilities First Lien Term Loan (1) (2) Senior Notes (3) Capital Lease Obligations Installment Notes & Other (4) Total Debt Total Net Debt PF Adj. EBITDA (5) Total Debt / PF Adj. EBITDA Net Debt / PF Adj. EBITDA GMS GYPSUM MANAGEMENT & SUPPLY, INC. JEWNE 4/30/22 LTM (4) (5) $102 $211 501 345 120 7 $1,184 $1,082 $588 2.0x 1.8x 7/31/22 10/31/22 1/31/23 4/30/23 LTM LTM LTM LTM $107 $265 500 345 125 5 $1,240 $1,133 $625 2.0x 1.8x $124 $240 499 345 126 3 $1,214 $1,090 $662 1.8x 1.6x $187 $240 498 346 132 8 $1,223 $1,037 $668 1.8x 1.6x $164 $110 497 346 137 8 $1,099 $935 $675 (1) Net of unamortized discount of $0.5mm, $0.4mm, $0.4mm, $0.3mm and $0.3mm as of April 30, 2022, July 31, 2022, October 31, 2022, January 31, 2023 and April 30, 2023 respectively. Net of deferred financing costs of $3.1mm, $2.9mm, $2.6mm, $2.4mm and $2.1mm as of April 30, 2022, July 31, 2022, October 31, 2022, January 31, 2023 and April 30, 2023 respectively. Net of deferred financing costs of $4.8 mm, $4.7mm, $4.5mm, $4.3mm and $4.1mm as of April 30, 2022, July 31, 2022, October 31, 2022, January 31, 2023 and April 30, 2023 respectively. Net of unamortized discount of $0.4mm, $0.3mm, $0.2mm, $0.2mm and $0.1mm as of April 30, 2022, July 31, 2022, October 31, 2022, January 31, 2023 and April 30, 2023 respectively. For a reconciliation Pro Forma Adjusted EBITDA to net income, the most directly comparable GAAP metric, see Appendix. 1.6x 1.4x 19

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