ELEVATE SUMMIT MATERIALS Q1 2021 Results PresentationM a y 11 , 2 0 2 1 Forward-Looking Statements 2 This presentation includes "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," "outlook," "should," "seeks," "inten ...

Financial Data and Key Metrics Changes - Summit Materials reported record Q4 results for net revenue, operating income, and adjusted EBITDA, with net revenue increasing 13% to $571.9 million [12][36] - Full year 2020 net revenue reached $2.1 billion, up 5.1% from 2019, driven by volume increases and acquisition-related growth [18][38] - Adjusted EBITDA for Q4 was $130.6 million, up 8% year-over-year, while full year adjusted EBITDA was $485 million, also up 5.1% [40][41] - The company achieved a year-end leverage ratio of 3.2 times, the lowest in its history, with a significant improvement over the past five quarters [21][59] Business Line Data and Key Metrics Changes - Aggregate volumes increased by 24.7% in Q4, with cement volumes up 4.5%, ready-mix volumes up 6.4%, and asphalt volumes up 20.3% [13][40] - The West segment was the largest contributor to Q4 results, benefiting from residential activity in Utah and Texas, while the East segment saw double-digit organic growth in Kansas aggregates [13][14] - The Cement segment reported higher adjusted EBITDA compared to Q4 2019, driven by demand recovery and price increases implemented in June 2020 [16][38] Market Data and Key Metrics Changes - Summit's end-use markets are approximately 38% public, 31% residential, and 31% non-residential, with favorable conditions for residential construction [24] - In Texas, projected lettings for the current fiscal year are $9.6 billion, a substantial increase from the previous year, supported by over $900 million from recent stimulus [25] - Kansas is planning $1.9 billion in spending for the current fiscal year, with single-family permits up 16% year-over-year [27] Company Strategy and Development Direction - The company is focused on cash optimization and operational improvements, particularly in Kentucky, where public spending has been deferred [15][19] - Summit plans to invest $200 million to $220 million in CapEx for 2021, with $25 million to $35 million allocated for Greenfields [62] - The company is optimistic about future infrastructure plans from the new administration, which may drive demand for materials and services [31][32] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in the overall demand picture for 2021, particularly in residential markets, despite some disruptions from cold weather [22][107] - The company anticipates adjusted EBITDA for 2021 to be in the range of $490 million to $520 million, reflecting a 5% increase over 2020 [61] - Management highlighted the importance of safety and operational excellence, which contributed to record performance in 2020 [10][63] Other Important Information - The Green America recycling facility operated on a limited basis in Q4, impacting adjusted EBITDA by $4.2 million, with expectations for full operations to resume in early 2021 [17][55] - The company generated $246 million of free cash flow in 2020, resulting in a closing cash position of $418 million, an increase of over $100 million from the prior year [58] Q&A Session Summary Question: Impact of the 53rd week on guidance - Management clarified that the 53rd week impacted results in October and provided a boost across the business, with expectations for steady growth throughout the year [68][85] Question: Shape of the year for aggregates growth - Management indicated steady growth in residential markets, with Kansas bidding starting and expectations for a second-half impact from Greenfield projects [74][75] Question: M&A pipeline and focus - The M&A pipeline remains active, with a focus on high ROIC opportunities, particularly in markets where vertical integration is strong [119] Question: Cost inflation headwinds - Management acknowledged inflationary pressures in labor, healthcare, and hydrocarbon costs, but expects to recover some of these through productivity improvements and price increases [91][93] Question: Impact of winter storm on Q1 - Management noted that while Q1 is typically the lowest quarter, the impact of the winter storm was manageable, and operations are expected to catch up quickly [106][108]

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended January 2, 2021 OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbers: 001-36873 (Summit Materials, Inc.) 333-187556 (Summit Materials, LLC) SUMMIT MATERIALS, INC. SUMMIT MATERIALS, LLC (exact ...

Summit Materials, Inc. (NYSE:SUM) Q3 2020 Results Conference Call October 28, 2020 11:00 AM ET Company Participants Karli Anderson - Vice President, Investor Relations Anne Noonan - Chief Executive Officer Brian Harris - Chief Financial Officer Conference Call Participants Kathryn Thompson - Thompson Research Phil Ng - Jefferies Jerry Revich - Goldman Sachs Stanley Elliott - Stifel Adam Thalhimer - Thompson Davies Trey Grooms - Stephens Garik Shmois - Loop Capital Rohit Seth - Truist Securities Anthony Pett ...

3Q20 Results Investor Presentation October 28, 2020 SUMMIT Materials Legal Disclaimer Forward-Looking Statements This presentation includes "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," "outlook," "should," "se ...

Summit Materials, Inc. (NYSE:SUM) Q2 2020 Results Earnings Conference Call July 22, 2020 11:00 AM ET Company Participants Karli Anderson - Vice President, Investor Relations Tom Hill - President and CEO Brian Harris - Chief Financial Officer Conference Call Participants Kathryn Thompson - Thompson Research Group Trey Grooms - Stephens, Inc. Anthony Pettinari - Citi Phil Ng - Jefferies Stanley Elliott - Stifel Seldon Clarke - Deutsche Bank Garik Shmois - Loop Capital Operator Ladies and gentlemen, thank you ...

2Q20 Results Investor Presentation July 22, 2020 SUMMIT Materials Legal Disclaimer Forward-Looking Statements This presentation includes "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," "outlook," "should," "seeks ...

Financial Data and Key Metrics Changes - Summit Materials reported record Q1 net revenue of $342.4 million, up 12% from Q1 2019 [13][29] - Adjusted EBITDA for Q1 was $16.4 million, an increase of 149% from the previous year [15][30] - The net loss attributable to Summit decreased by $23.8 million compared to Q1 2019, with a reported basic loss per share of $0.40, improving by $0.22 per share [31][32] Business Line Data and Key Metrics Changes - Aggregate volumes increased by 9.7%, with ready-mix volumes up 14% and average sales prices rising by 6% [14][34] - Adjusted cash gross profit margin expanded by 220 basis points in Q1 2020, with adjusted EBITDA margins increasing by 260 basis points [33][35] - Cement contributed 22% of adjusted EBITDA in 2019, with production flexed according to demand [17][30] Market Data and Key Metrics Changes - The company's end-use markets are 38% public, 31% residential, and 31% nonresidential, with lower density and fewer outbreaks in their operational areas compared to more populated regions [19][20] - Public highway activity remains resilient in major markets like Texas, Kansas, and Missouri, with funding for infrastructure projects continuing [12][40] - Housing inventories in Summit's markets were well below long-term averages, indicating strong demand [11][40] Company Strategy and Development Direction - The company is reducing its capital expenditures guidance to $145 million to $160 million, primarily deferring greenfield activities [9][27] - Summit's strategy emphasizes flexibility in operations and a strong financial position, with over $500 million in liquidity [13][38] - The company anticipates long-term growth in residential and nonresidential construction, supported by low interest rates and federal infrastructure funding [41][42] Management's Comments on Operating Environment and Future Outlook - Management noted that while the near-term impact of COVID-19 is uncertain, the company is in a strong strategic and financial position [9][38] - The construction season has begun with typical demand for aggregates, asphalt, and ready-mix, despite some project delays [16][19] - Management expressed optimism about the potential for federal infrastructure funding to support state and local projects [40][89] Other Important Information - The company has implemented extensive safety protocols in response to COVID-19, ensuring business continuity [6][8] - The nearest debt maturity is over three years away, limiting financial risk [13][26] - The company has a flexible cost structure, with over 75% of costs being variable, allowing for adjustments based on demand [23][24] Q&A Session Summary Question: Expectations regarding the CARES Act and future lettings - Management indicated uncertainty about direct funding from the CARES Act but noted it could relieve pressure on state budgets [45] - They reported ongoing work in states like Texas and Kansas, with optimism for future lettings [46] Question: Cement production and demand outlook - Management acknowledged uncertainty in the cement business but noted a good recovery in April [50] Question: Aggregates pricing and margin outlook - Management reported a mix-adjusted price increase of about 3% in Q1 2020 and expressed optimism for future pricing [54] Question: Non-residential customer discussions - Management noted some project deferrals in Las Vegas but overall stability in larger markets [69] Question: Comparison to the 2009 downturn - Management highlighted that current markets are underserved compared to the overbuilt conditions prior to the 2009 downturn [79] Question: Infrastructure funding outlook - Management expressed optimism for a federal infrastructure bill, which could support state projects [89]