Summit Materials, Inc. (NYSE: SUM, “Summit” or the “Company”), a leading vertically integrated construction materials company, today announced that it will release fourth quarter and full year 2021 financial results after the market closes on Wednesday, February 23, 2022. A conference call will be held on Thursday, February 24, 2022 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 fourth quarter and full year 2021 results conference call and accompanying presentation materials will be available in the Investors section of Summit’s website at investors.summit-materials.com or at the following link: https://event.on24.com/wcc/r/3578265/7A3DFFCA13D12D7E90C4325F6D60C0F9

To participate in the live teleconference for fourth quarter and full year 2021 financial results:

To listen to a replay of the teleconference, which will be available through March 3, 2022:

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 www.summit-materials.com.

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