Investor Presentation January 2017 Legal Disclaimer - PowerPoint PPT Presentation

Investor Presentation January 2017

Legal Disclaimer Forward-Looking Statements This presentation contains “forward-looking statements” within the meaning of the federal securities laws, which involve risks and uncertainties. Forward-looking statements include all statements that do not relate solely to historical or current facts, and you can identify forward-looking statements because they contain words such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “intends,” “trends,” “plans,” “estimates,” “projects” or “anticipates” or similar expressions that concern our strategy, plans, expectations or intentions. Any and all statements made relating to the macroeconomic outlook for our markets, potential acquisition activity, our estimated and projected earnings, margins, costs, expenditures, cash fmows, sales volumes and fjnancial results are forward-looking statements. These forward-looking statements are subject to risks and uncertainties that may change at any time, and, therefore, our actual results may differ materially from those expected. We derive many of our forward-looking statements from our operating budgets and forecasts, which are based upon many detailed assumptions. While we believe that our assumptions are reasonable, it is very diffjcult to predict the impact of known factors, and, of course, it is impossible to anticipate all factors that could affect our actual results. In light of the signifjcant uncertainties inherent in the forward-looking statements included herein, the inclusion of such information should not be regarded as a representation by us or any other person that the results or conditions described in such statements or our objectives and plans will be achieved. Important factors could affect our results and could cause results to differ materially from those expressed in our forward-looking statements, including but not limited to the factors discussed in the section entitled “Risk Factors” in our Annual Report on Form 10-K fjled with the SEC on February 22, 2016. Such factors may be updated from time to time in our periodic fjlings with the SEC, which are accessible on the SEC’s website at www.sec.gov. We undertake no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as otherwise required by law. Non-GAAP Financial Measures Included in this presentation are certain non-GAAP fjnancial measures, such as Adjusted EBITDA, Further Adjusted EBITDA, Adjusted EPS, Gross Profjt and Net Debt, designed to complement the fjnancial information presented in accordance with U.S. GAAP because management believes such measures are useful to investors. These non-GAAP fjnancial measures should be considered only as supplemental to, and not superior to, fjnancial measures provided in accordance with GAAP. Please refer to the appendix of this presentation for a reconciliation of the historical non- GAAP fjnancial measures included in this presentation to the most directly comparable fjnancial measures prepared in accordance with GAAP. Reconciliations of the non-GAAP measures used in this presentation are included in the tables attached to the appendix, to the extent available without unreasonable effort. Because GAAP fjnancial measures on a forward-looking basis are not accessible, and reconciling information is not available without unreasonable effort, we have not provided reconciliations for forward-looking non-GAAP measures. 1

Investment Thesis Vertically integrated supplier of materials, products and services − Materials-Based Integrated Model − Diversifjed geographic and end-market exposure Stable volume markets with margin growth potential − 3-Year Net Revenue CAGR = 10.9% − Record of Superior Performance − 3-Year Gross Profjt CAGR = 19.1% 3-Year Adjusted EBITDA CAGR = 23.9% − Decades of public company heavy materials experience − Experienced Management Team − Completed hundreds of materials acquisitions during career tenures − 47 acquisitions since 2009 – more than $2.5 billion of capital invested Successfully acquire, integrate and improve acquired assets − Proven Acquisition Strategy − Deep acquisition pipeline – extensive industry contacts − Early innings of the current construction cycle Favorable demographic trends in core markets − Favorable Industry Dynamics − High barriers to entry in materials markets − Focused on optimizing cash-on-cash returns Disciplined Capital Allocation Leverage is cycle-dependent − − Optimize fjnancial fmexibility at all points in cycle 2

Advantaged Asset Base EXPANDING GEOGRAPHIC FOOTPRINT TOP 3 MARKET SHARE IN LOCAL MARKETS Location Aggregates RMC Asphalt ü ü ü Utah – Salt Lake City Texas — ü ü WEST Austin — ü ü Houston — ü ü Midland/Odessa — ü ü Paris — — ü British Columbia – Vancouver East Kansas — ü ü Perry West ü ü ü Wichita EAST Headquarters — ü ü Missouri – Columbia Cement Plants — ü ü Kentucky – Paris Cement Terminals ü ü ü Virginia – Roanoke CEMENT Missouri – Hannibal — — Cement Iowa – Davenport DECENTRALIZED, INTERDEPENDENT MODEL ACHIEVES BEST OF LOCAL/BEST OF SCALE ADVANTAGE NET REVENUE BY END USE NET REVENUE BY SEGMENT ADJUSTED EBITDA BY LINE OF BUSINESS (LTM 3Q16) (LTM 3Q16) (1) (LTM 3Q16) (2) Services 5% East Public 30% West Products Private 36% 51% 34% Materials 64% Cement 61% 19% 1 As reported 10/1/16 2 Pro Forma for full-year ownership of acquisitions completed since 10/1/16 3

Experienced Management Team TOM HILL, CEO ► Founded Summit Materials in 2009 ► 30+ years of industry experience at Oldcastle, Inc., the North American arm of CRH plc – CEO of Oldcastle Materials from 1992 to 2006 – CEO of Oldcastle, Inc. ($15B revenue, $2B EBITDA) from 2006 to 2008 – Served on the CRH plc Board of Directors from 2002 to 2008 ► Former Chairman of American Road and Transportation Builders Association (2002 – 2004) – Now serving on Executive Committee and as Treasurer BRIAN HARRIS, Executive Vice President and CFO ► Joined Summit Materials in 2013 ► Previously Executive Vice President and CFO of Bausch & Lomb Holdings Inc. (2009 – 2013) ► Held several key senior management roles at Tomkins plc, including President of its Worldwide Power Transmission business, President of Gates Unitta Asia, Senior Vice President for Strategic Business Development, and CFO of Gates Corp. (1989 – 2009) 4

Unique, Materials-Based Integrated Model MATERIALS PRODUCTS SERVICES Asphalt Vertically Aggregates Paving + Integrated + + Ready-Mix Model Cement Other Concrete 62% 59% 54% Margin Capture 44% 43% 40% Begins with 27% 27% Strong 26% 25% 26% 21% Aggregates Position Gross Profjt 2014 2015 LTM 2014 2015 LTM 2014 2015 LTM 2014 2015 LTM Margin % 3Q16 3Q16 3Q16 3Q16 AGGREGATES CEMENT (1) PRODUCTS SERVICES 1 Represents “Cement Segment” 5

Track Record of Superior Performance GROSS PROFIT ($MM) AND GROSS PROFIT MARGIN (%) 37% (1) $536 34% (1) $442 30% (1) $317 29% (1) $239 2013 2014 2015 LTM 3Q16 ADJUSTED EBITDA ($MM) AND ADJUSTED EBITDA MARGIN (%) 25% (2) $360 22% (2) $288 18% (2) $189 16% (2) $130 2013 2014 2015 LTM 3Q16 1 Gross Profjt Margin defjned as Gross Profjt divided by Net Revenue 2 Adjusted EBITDA Margin defjned as Adjusted EBITDA divided by Net Revenue 6

Acquisition and Organic-Driven Growth DOMESTIC MARKET ACQUISITION PROVEN ABILITY TO IMPROVE MARGINS SIZE AND CAPACITY OPPORTUNITIES Cement – $11 B ► Provide resources and operational and fjnancial Performance $55 B rigor to previously standalone businesses Teams Opportunity 25% ► Drive improvements quickly & permanently by Public Asphalt 75% embedding within operational culture ► Enhance effjciency and maximize margins Aggregates – $22 B Public 40% Business and ► Pricing & productivity, fjxed assets Opportunity 60% utilization, procurement Functional Ready-mix Focuses Concrete ► Introduce tools, methodologies & training to support commercial & operational Ready-mix Concrete – $35 B decision-making Public 25% ► Promote collective knowledge and best Opportunity Cement practice sharing, supported by world-class IT 75% $3 B ► Achieve benefjts of scale ‘Best of Both Asphalt – $20 B Aggregates Worlds’ $13 B ► Maintain local entrepreneurial autonomy Public Approach 20% Opportunity 80% Source: Company reports and estimates Note: Domestic market sizes assume: Cement – 100Mt X $100.00; Aggregates – 2.1Bt X $9.25; 7 Ready-mix Concrete – 300M CY X $92.50; Asphalt – $360Mt X $45.00

Expanding Geographic Footprint AUGUST 2009 – 1 PLATFORM AND $19 MILLION IN FURTHER ADJ. EBITDA Aug 2009 1 Acquisition 1 Platform 29 Locations $51 M Platform Revenue $19 M Further Adj. EBITDA SEPTEMBER 2016 – 12 PLATFORMS AND $379 MILLION IN FURTHER ADJ. EBITDA Sept 2016 46 Acquisitions 12 Platforms 338 Locations $1.5 B Cement Revenue (1) East $379 M Further Adj. EBITDA West Platforms Bolt-ons 1 Pro Forma for all aquisitions through 9/26/16 8