Sustainability

Global Imperative. Local Impact.

Sustainability at Summit Materials goes beyond reducing emissions and hitting renewable energy targets—it’s about respecting the environmental and human resources that support our business. We are dedicated to responsible stewardship and sustainable practices that benefit our communities. Guided by stakeholder priorities, our tailored programs reflect the unique needs of our operations. As a North American leader, we recognize our role in driving the industry toward a sustainable future, setting ambitious goals and working tirelessly to achieve them. 

Environmentally Conscious

With operations across North America, we embrace our responsibility to lead in sustainability and drive our industry toward a more sustainable future. That’s why we’ve set ambitious goals and work relentlessly each day to achieve them. 

Responsible Leadership

With operations across North America, we embrace our responsibility to lead in sustainability and drive our industry toward a more sustainable future. That’s why we’ve set ambitious goals and work relentlessly each day to achieve them. 

PILLARS OF SOCIAL RESPONSIBILITY

Sustainability goes beyond reducing emissions or meeting renewable energy targets; it’s a business approach rooted in respect for the environmental and human resources that sustain our company.

Human/Social Impact

Summit employs over 7,000 people, extending our impact to families, customers, and communities. We're committed to initiatives that attract, retain, and develop diverse talent to drive growth and innovation, with a focus on our broader community impact. Our priorities include strengthening diversity, equity, and inclusion, enhancing employee engagement, ensuring pay equity, and refining our talent acquisition and retention practices.

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Land Reclamation

With over 400 sites across North America, Summit’s operations impact ecosystems and communities. Reclaiming and rehabilitating depleted sites helps us mitigate this impact, foster goodwill, and extend site value. As we reach the end of each site’s life and carefully manage every drop of water, our goal is to leave the land better than we found it.

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Carbon Reduction

Customers and investors are pushing for a lower-carbon future, and Summit is committed to leading decarbonization in our sector through product and operational innovation. With current technologies, we expect to reduce our 2020 baseline impacts by approximately 25% by 2030 and 50-75% by 2050. To reach net-zero by 2050, we plan to balance remaining impacts with market-based offsets and credits. At the same time, we’re actively exploring emerging technologies to drive further progress.

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Human/Social Impact Land Reclamation Carbon Reduction

ESG Reports

At Summit, we believe transparency is essential to sustainability. Download our 2023 ESG and DE&I Reports to learn about our progress toward sustainability goals, or follow our ESG Stories Blog for ongoing updates.

2023 ESG Report

2023 ESG Report

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Task Force on Climate-Related Financial Disclosures Report

Task Force on Climate-Related Financial Disclosures Report

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2023 DE&I Report

2023 DE&I Report

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Special Cement & Green America Recycling Report

Special Cement & Green America Recycling Report

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Additional Reports

We invite investors and other interested parties to learn more about our sustainability policies and governance initiatives.

Our PoliciesGovernance Documents

Cautionary Note Regarding Forward-Looking Statements & Other General Disclosures

Information contained in this website, and the documents incorporated by reference
herein, may include “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. These forward-looking statements are subject to risks,
uncertainties and other factors that may cause our actual results, performance or
achievements to be materially different from future results, performance or
achievements expressed or implied by such forward-looking statements. While Summit
Materials, Inc. (“Summit,” or the “Company”) believes that our assumptions are
reasonable, it is very difficult to predict the effect of known factors, and, of course, it is
impossible to anticipate all factors that could affect our actual results. In light of the
significant 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 realized and the reader should not place undue reliance on
these statements. 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 (i) factors impacting the Company’s inability to achieve its environmental,
social and governance (ESG) targets within the projected timelines or in the projected
manner, the inability to achieve its Diversity, Equity and Inclusion initiatives and targets
within the projected timelines or in the projected manner, the inability to reduce turnover
at the desired levels and within the desired timelines, the inability to achieve targeted
employee engagement levels within desired timelines, the lack of economically viable
market-based CO2 e offsets and credits, the performance of our environmental
management system, the performance of existing technology related to CO2 e emission
reductions, the development of future technologies related to CO2 e emissions, the
continued evolution and development of ESG methodologies, frameworks and
standards, market adoption of products with less environmental impact, including
without limitation, portland limestone cement, (ii) the factors discussed in the section
entitled “Risk Factors” in Summit’s Annual Report on Form 10-K for the fiscal year

ended December 30, 2023, and Quarterly Report on Form 10-Q for the fiscal quarter
ended March 30, 2024, each as filed with the Securities and Exchange Commission
(“SEC”), and any factors discussed in the section entitled “Risk Factors” in any of our
subsequently filed SEC filings and (iii) factors resulting from, arising out of or otherwise
relating to that certain Agreement and Plan of Merger entered into by and among
Summit, Quikrete Holdings, Inc., a Delaware corporation (“Purchaser”), and Soar
Subsidiary, Inc., a Delaware corporation and a wholly owned subsidiary of Purchaser
(“Merger Sub”), pursuant to which Merger Sub, on the terms and subject to the
conditions set forth therein, will merge with and into Summit (the “Merger”), with Summit
surviving as a wholly owned subsidiary of Purchaser including, without limitation, the
consummation or failure to consummate any of the transactions contemplated thereby.
Information about the Merger is available in the definitive proxy statement on Schedule
14A relating to a special meeting of Summit’s stockholders (the “Proxy Statement”)
which Summit filed with the SEC on December 30, 2024.

All subsequent written and oral forward-looking statements attributable to us, or persons
acting on our behalf, are expressly qualified in their entirety by these cautionary
statements. Any forward-looking statement that we make herein speaks only as of April
2, 2024. 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 required
by law. This report contains some figures that have been approximated or rounded. This
report and data within have not been reviewed by a third party and contains non-GAAP
information. Various environmental, social and governance (ESG) metrics understand
the concept of materiality differently and we do not attempt to reconcile these different
understandings. The information that we disclose in this report cross references certain
frameworks, when applicable. However, we also disclose information not mentioned by
such frameworks that we believe relevant to our sustainability initiatives. Over time, we
will continue to seek to achieve more alignment with leading frameworks, even as such
frameworks continue to evolve. Inclusion of information in this report should not be
construed as a characterization of materiality or financial impact of such information.