Martin Marietta

Biomason is a company focused on developing biological cement-based building materials that offer a sustainable alternative to traditional clay and concrete. By utilizing natural microorganisms and innovative chemical processes, Biomason produces biocement at ambient temperatures, significantly reducing the energy consumption typically associated with conventional manufacturing methods. This technology not only provides builders with carbon-free building materials but also aims to eliminate 25% of the concrete industry's global carbon emissions by 2030. Since its inception in 2012, Biomason has successfully implemented its biocement in various projects across the United States and Europe, with its bioLITH precast tile products currently available for commercial use.

Lehigh Hanson is a prominent construction materials provider in North America, operating over 550 active facilities across the United States and Canada. The company specializes in the production and supply of a wide range of building materials, including cement, aggregates, ready-mixed concrete, and asphalt. With a focus on key markets, particularly in California and Arizona, Lehigh Hanson aims to leverage its extensive operations to support growth in major urban regions. Through its diverse offerings, the company plays a significant role in the construction industry, catering to various infrastructure and building projects.

Bluegrass Materials Company is a producer of aggregates and concrete blocks, headquartered in Jacksonville, Florida. The company operates in several states, including Kentucky, South Carolina, Tennessee, Georgia, and Maryland. In Kentucky, its operations are concentrated around Bowling Green and in rural areas near the Kentucky-Virginia border. Bluegrass has three quarries in the Atlanta area and a granite quarry near Edgefield, South Carolina, which serves the Aiken area. Additionally, it operates a limestone plant in Calhoun, Tennessee, and a sand plant in St. George, Georgia. In Maryland, Bluegrass's activities are primarily located in the greater Baltimore and Frederick/Western Maryland regions. The company focuses on supplying construction materials to the construction sector through its various rock and granite quarries.

Rocky Mountain Materials & Asphalt, based in Colorado Springs, Colorado, specializes in the manufacture and supply of aggregate materials and asphalt. Established in 1977, the company offers a range of products including hot mix asphalt, decorative landscape rocks, and various premixes suitable for residential, commercial, and industrial construction. Additionally, Rocky Mountain provides concrete sand, fill sand, and dumping services for broken concrete and asphalt. The company also engages in road construction and asphalt paving services, along with snow removal services for commercial properties.

Rocky Mountain Premix is a privately held company engages in manufacturing of ready mix concrete.

Texas Industries, Inc., based in Dallas, Texas, specializes in the manufacture and sale of heavy construction materials in the southwestern United States. Founded in 1946, the company operates through three primary segments: Cement, Aggregates, and Consumer Products. The Cement segment focuses on producing gray Portland cement and specialty cements, including masonry and oil well cements. Through its diverse offerings, Texas Industries plays a significant role in the construction materials market.