GMS Investor Conference Presentation Deck

End Market & Product-Level Expectations for Q2 FY2024 Product Category Q2 FY24 YOY Volume Expectations Q2 FY24 YOY Price/Mix Expectations Wallboard Ceilings Steel Framing Complementary Products Multi-family: Up high single-digits Single-family: Down low double-digits Commercial: Up low single-digits Total Wallboard: Down low single-digits Up low single-digits Up high single-digits Up* GMS GYPSUM MANAGEMENT & SUPPLY, INC. ● *Sales growth in Complementary Products, including the benefits of recent acquisitions, is expected to be up mid single-digits. 12hvdS Georgia Pacific Georgie-Pie Ria Georgia Pacific Georgia Pacifie Sergio Georgia-Pacific Georgia Pacific INTERIOR CEILING PLAFOND INTERIOR CEIL ed PLAFOND INTERIEUR cainTeed INTERIOR CRILING POUR PLAFOND INTERIEUR INTERIOR CEILING Certainleed COUPLEOND INTE POUR TERIEUR Certairfoed UR PLAFOND INTERIEUR Certainleed "TERIOR CEINTERIEUR POUR PLAFOND Certainleed INTERIOR CEILING KEND INTÉRIEUR Down low single-digits Down low single-digits Down -25% Up* 1/2" x 12 TE/BAZIL 1/2" x 12' TE/BA 1/2 x 12 TE/BA 1/2 x 12 1/2" 12 BELOZNIA TE/BA 1/2 x 12 BELL EL *.ZIL CO/AL.ZL*.2/L TE/BA TE/BA 1/2 x 12 TE/BA 12 TE/BA L MORENO MORINI MORINI OSVOT CONFERMONE HOTELI OSV DNNEDE MOINEEN MON 16

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