Summit Materials, Inc. (NYSE: SUM, “Summit” or the “Company”), a leading vertically integrated construction materials company, today announced that it will release second quarter 2021 financial results after the market closes on Wednesday, August 4, 2021. A conference call will be held on Thursday, August 5, 2021 at 11:00 a.m. eastern time (9:00 a.m. mountain time) to review Summit’s financial results, discuss recent events and conduct a question-and-answer session.

A webcast of the second quarter 2021 results conference call and accompanying presentation materials will be available in the Investors section of Summit’s website at or at the following link:

To participate in the live teleconference for second quarter 2021 financial results:

Domestic Live: 1-877-823-8690 International Live: 1-825-312-2236 Conference ID: 3865846 Password: Summit

To listen to a replay of the teleconference, which will be available through August 12, 2021:

Domestic Replay: 1-800-585-8367 International Replay: 1-416-621-4642 Conference ID: 3865846

About Summit Materials, Inc.

Summit Materials is a leading vertically integrated materials-based company that supplies aggregates, cement, ready-mix concrete and asphalt in the United States and British Columbia, Canada. Summit is a geographically diverse, materials-based business of scale that offers customers a single-source provider of construction materials and related downstream products in the public infrastructure, residential and non-residential end markets. Summit has a strong track record of successful acquisitions since its founding and continues to pursue growth opportunities in new and existing markets. For more information about Summit Materials, please visit

Karli Anderson EVP, Chief Environmental, Social & Governance Officer and Head of Investor Relations Summit Materials, Inc. 303-875-3886

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