GMS Investor Conference Presentation Deck

Local Go-To-Market Strategy with Scale Benefits AMERICAN ARCHITECTURAL SAM WORK PREMIUM FOAM CONSTRUCTION CHAPARRAL MATERIALS, INC. AOME COMPANY GYPSUM SUPPLY COMPANY LEADING EDGE INSULATION SERVICES ACOMMAY OLYMPIA BUILDING SUPPLIES AG COMPANY SLEGG BUILDING MATERIALS AGE+COMPANY Interior Products A GMO COMPANY AMES. ASI Brywall Finishing Tools & Services BUILDING PRODUCTS A GMS COMPANY BM CHEROKEE BUILDING MATERIALS A GMS COMPANY GTS Interior Supply AGNA COMPANY ne Star Materials Inc. AGMS COMPANY SERVICE VALLE QUALITY PHD A GMS COMPANY G SVS sun valley supply, Inc. AGHS COMPANY WATSON ACOMPANY GMS GYPSUM MANAGEMENT & SUPPLY, INC. ACOMPANY Colonial Materials SINCE HARDY 1946 A GMS COMPANY MISSOURI DRYWALL SUPPLY A GMS COMPANY PIONEER materials, inc. BADGERLAND SUPPLY A OMS COMPANY COMMONWEALTH 2 A GMS COMPANY BUILDING MATERIALS AGMS COMPANY HATHAWAY BUILDING MATERIALS SLECE 1944 A GMS COMPANY EER IDS M.R.Lee NEW ENGLAND GYPSUM BUILDING MATERIALS INC. A GMS COMPANY MATERIA WEST TAMARACK Tanner A GMS COMPANY WESTSIDE Wildcat MATERIALS BC Ceiling Systems A GMS COMPANY AGME COMPANY coreacoustics Integrated Acoustic Sy ips INTERIOR PRODUCTS SUPPLY PMW ACOUSTICAL TEJAS MATERIALS, INC. AC D&A C CAPCO Produ A OMS COMPANY COWTOWN MATERIALS, INC. J&MATERIALS NORTH AMERICAN DOOR & HARDWARE. ACCOMANY RIVER BEND MATERIALS,INC. TROWEL TTTRADES SUPPLY CAPITOL BUILDING SUPPLY AGMS COMPANY dL RIGNEY KARPP AGMS COMPANY NYC ACOUSTICAL SUPPLY ROCKY TOP MATERIALS INC. ACOMPANY TUCKER Capitol Materials, Inc. A GMS COMPANY DRYWALL SUPPLY INC. AGMS COMPANY STEVEN KEMPF BUILDING MATERIALS AGMS COMPANY OHIO VALLEY DRYWALL SUPPLY AGIMS COMPANY Ryan APITOL DSI CATUR GYPSUM TUCKER MATERIALS MATERIAL CMC COASTAL A GMS COMPANY A OME COMPANY RKIMCO SUPPLY COMPANY SILBINE SUPPLY SPECIALIST AGME COMPANY OHIO VALLEY INSTALLED INSULATION A OMS COMPANY SHOEMAKER DRYWALL SUPPLIED UNITED AGS COMMNY W Canada GMS distribution locations USA and Canada ● SW MW NE Tod SE GMS's model provides for the intimacy of a local business, exceptional customized service and an entrepreneurial culture while leveraging North American economy of scale Combines the benefits of a local "go-to-market" strategy and relationships with economics of scale Integrated North American platform operated through over 50 highly-respected local brands 5

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