Summit Materials

Everist Materials is the largest supplier of aggregate, asphalt, and concrete materials in the northwestern Colorado Rocky Mountain region. The company produces and supplies a range of construction-related products, including ready-mix concrete, cement, and asphalt. With a focus on quality, Everist Materials serves various construction needs in the area, contributing to the local infrastructure and development projects.

Razorback Concrete is a manufacturer specializing in cement aggregates and ready-mix products for the construction industry. It operates the largest ready-mixed concrete operations in central and northeastern Arkansas, supported by a comprehensive aggregate production and distribution network that includes active ready-mix plants. The company offers a range of products, including concrete, pea gravels, manufactured and masonry sand, as well as various asphalt fractions. Razorback's strategic location near a cement distribution terminal in Memphis aligns with its long-term growth objectives, particularly as the Arkansas market is expected to experience increased construction activity driven by positive employment trends and rising public infrastructure investment.

Sierra Ready Mix, LLC is a manufacturer and supplier of ready mix concrete located in Las Vegas, Nevada. Established in 1994, the company serves a diverse range of clients, including masons, concrete house slab contractors, commercial concrete tilt-up contractors, and projects for state and federal entities. Sierra Ready Mix provides essential materials for concrete production, including aggregates, which form 60% to 75% of concrete mixtures, as well as cement paste, a combination of cement, water, and potentially fly ash. The company operates as a subsidiary of Summit Materials, Inc.

Boxley Materials, established in 1906 and headquartered in Roanoke, Virginia, specializes in the production of high-quality construction materials. The company focuses on manufacturing a diverse range of aggregates, including crushed limestone, granite, and sandstone, ensuring consistent size and shape through advanced technology and quality processes. Boxley Materials meets the stringent requirements set by the American Association of State Highway and Transportation Officials (AASHTO) for various aggregate sizes, catering to the demands of the construction industry. In addition to aggregates, the company offers asphalt, block, brick, and concrete products, serving road builders and other construction sectors primarily in Blue Ridge, Virginia.

American Materials Company, LLC, established in 1999 and headquartered in Wilmington, North Carolina, is the largest independent producer of sand and gravel in Eastern North Carolina and Northeastern South Carolina. The company specializes in manufacturing and marketing a wide range of aggregates, including mortar, asphalt, concrete, and various types of sand and gravel. Additionally, it offers hauling, trucking, recycling, and crushing services to meet the diverse needs of its construction industry customers. With a focus on quality, service, and safety, American Materials Company is committed to maintaining competitive pricing while adhering to industry specifications. As a subsidiary of Summit Materials since 2016, the company leverages the expertise of its experienced staff to uphold its reputation as a reliable supplier in the aggregate market.

Alleyton Resource is a company that was acquired by Summit Materials in 2014.

Westroc, Inc. manufactures ready mix concrete and aggregate products for residential and commercial projects primarily in Utah County, South Salt Lake County, Juab County, Sanpete County, and Sevier County, Utah.

Ramming Paving Company Ltd is an integrated construction materials company and is one of the largest independent aggregate and asphalt producers serving the greater Austin and San Antonio, Texas markets.

Cornejo & Sons is a closely held corporation specializing in concrete and asphalt paving, ready mix concrete, sand and gravel extraction, demolition and warehousing.