GMS Results Presentation Deck

Strategic Growth Priorities - Q1 Fiscal 2024 Update Expand Share in Core Products ● ● ● Capitalize on existing fixed investments in locations and equipment where we are underpenetrated or below expected share Industry data indicates that we grew share in each of our core product categories Value-added delivery to the point of use helped drive sales in tight labor market. Favorable mix of multi-family projects has provided a solid backlog of Steel Framing, Wallboard and Insulation deliveries to that end market. Benefits of scale and commitment to service resulted in securing a broad array of commercial projects across myriad markets. Grow Complementary Products GMS GYPSUM MANAGEMENT & SUPPLY INC. Grow Complementary Products opportunities outside of core products to diversify and profitably expand our offerings 6.0% per day net sales growth on acquisition gains 7.7% revenue gains excluding lumber. 11.7% revenue growth on focus Tools & Fasteners, EIFS and Stucco, and Insulation product lines. 13th straight quarter of growth for Complementary Expansion of Tool Source Warehouse operations. Expand Our Platform Expand the platform through accretive acquisition and greenfield opportunities Steady maturation of prior greenfields and acquisitions. During the 1st quarter we acquired Jawl Lumber Corporation d/b/a Home Lumber and Building Supplies in Canada. Core and Complementary pipeline remains active. Drive Improved Productivity & Profitability Leverage our scale and employ technology and best practices to deliver a best-in-class customer experience and further profit improvement Technology and process enabled improvements in myriad areas including warehouse operations, dispatch, delivery, purchasing, inventory management and pricing, Enhancing our role as a valuable partner by providing customers with the ability to easily transact with us. Organization-wide effort to reduce complexity cost and standardize data. As we've leveraged product inflation dynamics in the business, our productivity initiatives, along with growth in Complementary Products and expansion of scale, have enabled us to expand our Adjusted EBITDA margin from the upper single-digits in the years leading up to Covid to now consistently reporting these returns at double-digit levels for the past two fiscal years. 4

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