GMS Investor Conference Presentation Deck

Providing Value to Contractors and Builders A leading North American specialty distributor of construction products GMS provides the products and value-added services to contractors who install wallboard, ceilings, steel framing and other complementary building products ● ● Expertise across local markets, leveraging scaled North American footprint One-stop-shop for contractors with a broad product offering Critical link between suppliers and a highly fragmented customer base GMS GYPSUM MANAGEMENT & SUPPLY, INC. Net Sales Breakdown (YTD Q3 FY23) 29% COMPLEMENTARY PRODUCTS 19% STEEL FRAMING xxxxxxxxxxxxx 40% WALLBOARD 12% CEILINGS Note: YTD Q3 FY23 refers to the nine months ended January 31, 2023 4

View entire presentation