Investor Overview

September 2021

Safe Harbor and Basis of Presentation

Forward-LookingStatement Safe Harbor - This presentation includes "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. You can generally identify forward-looking statements by the Company's use of forward-looking terminology such as "anticipate," "believe," "confident," "continue," "could," "estimate," "expect," "intend," "may," "might," "plan," "potential," "predict," "seek," or "should," or the negative thereof or other variations thereon or comparable terminology. In particular, statements about the markets in which GMS operates and or our products, including potential growth in those markets, the economy generally, actions taken to optimize our operations and align our business consistent with demand, our ability to continue successfully navigating the evolving operating environment and executing our business, strategic initiatives and priorities and growth potential, pricing, net sales growth, gross margins, incremental EBITDA, cost discipline, operating leverage, interest expense, tax rates, capital expenditures, and free cash flow, cash flow generation and working capital management, future financial performance and liquidity, the ability of the Company to grow stronger, and the ability to deliver growth, value creation and long-term success contained in this presentation may be considered forward-looking statements. Statements about our expectations, beliefs, plans, strategies, objectives, prospects, assumptions or future events or performance may be considered forward-looking statements. The Company has based forward-looking statements on its current expectations, assumptions, estimates and projections. While the Company believes these expectations, assumptions, estimates and projections are reasonable, such forward-looking statements are only predictions and involve known and unknown risks and uncertainties, many of which are beyond its control, including current public health issues that may affect the Company's business. Forward-looking statements involve risks and uncertainties, including, but not limited to, those described in the "Risk Factors" section in the Company's most recent Annual Report on Form 10-K, and in its other periodic reports filed with the SEC. In addition, the statements in this release are made as of September 2, 2021. The Company undertakes no obligation to update any of the forward-looking statements made herein, whether as a result of new information, future events, changes in expectation or otherwise. These forward-

looking statements should not be relied upon as representing the Company's views as of any date subsequent to September 2, 2021.

Use of Non-GAAPand Adjusted Financial Information - To supplement GAAP financial information, we use adjusted measures of operating results which are non-GAAP measures. This non-GAAP adjusted financial information is provided as additional information for investors. These adjusted results exclude certain costs, expenses, gains and losses, and we believe their exclusion can enhance an overall understanding of our past financial performance and also our prospects for the future. These adjustments to our GAAP results are made with the intent of providing both management and investors a more complete understanding of our operating performance by excluding non-recurring, infrequent or other non-cash charges that are not believed to be material to the ongoing performance of our business. The presentation of this additional information is not meant to be considered in isolation or as a substitute for GAAP measures of net income, diluted earnings per share or net cash provided by (used in) operating activities prepared in accordance with generally accepted accounting principles in the United States. Please see the Appendix to this presentation for a further discussion on these non-GAAP measures and a reconciliation of these non-GAAP measures to the most directly comparable GAAP measures.

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GMS at a Glance

Leading North American specialty distributor of interior construction products:

> 280 branches across US & Canada

One-stop-shop for the interior contractor with broad product offering

Critical link between suppliers and a highly fragmented customer base

North American scale combined with local expertise

  • 5,800 employees embracing strong entrepreneurial culture Multiple levers to drive growth
    NYSE: GMS
    Market Cap: ~$2.2 billion Headquartered in Tucker, GA

GMS locations as of August 2021

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A One-Stop-Shop for the Interior Contractor

GMS provides a complementary and complete product offering with value-added service delivery to the interior contractor who installs wallboard, ceilings, steel framing and ancillary products needed to complete the job.

Net Sales Breakdown (Fiscal 2021)

Wallboard

41%

Steel Framing

14%Complementary

Products 31%

Ceilings 14%

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Product Offering

Core Offerings

Ceilings

Wallboard

Used to finish the

Suspended ceiling

interior walls and

systems primarily

ceilings in

comprised of

residential,

mineral fiber,

commercial and

ceiling tile and grid

institutional

Architectural

construction

specialty ceilings

projects

systems

Exterior wallboard

Steel Framing

Steel framing products for interior walls

Sold into commercial applications, typically as part of a package with wallboard, ceilings and other products

Complementary

Complementary Products

  • Primarily consists of complementary interior construction products, including joint compound, tools and fasteners, safety products, lumber & other wood products and insulation

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GMS Inc. published this content on 08 September 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 08 September 2021 20:11:04 UTC.