MLM vs SUM

Martin Marietta Materials Inc.

Martin Marietta Materials, Inc., a natural resource-based building materials company, supplies aggregates and heavy-side building materials to the construction industry in the United States and internationally. It offers crushed stone, sand, and gravel products; ready mixed concrete and asphalt; paving products and services; and Portland and specialty cement used in the infrastructure projects, and nonresidential and residential construction markets, as well as in the railroad, agricultural, utility, and environmental industries. The company also manufactures and markets magnesia-based chemical products for the industrial, agricultural, and environmental applications; and dolomitic lime primarily for customers in the steel and mining industries. Its chemical products are used in flame retardants, wastewater treatment, pulp and paper production, and other environmental applications. The company was founded in 1939 and is headquartered in Raleigh, North Carolina.

Summit Materials Inc.

Summit Materials, Inc., through its subsidiaries, produces and sells construction materials and related downstream products for the public infrastructure, residential and nonresidential, and other end markets. It operates through three segments: West, East, and Cement. The company's products include aggregates, cement, ready-mix concrete, asphalt paving mixes, and concrete products, as well as plastics components. It also provides paving and related services primarily comprising asphalt paving services to the private and public infrastructure sectors. In addition, the company operates municipal waste, construction, and demolition debris landfills; and liquid asphalt terminal. Summit Materials, Inc. has operations in the United States; and British Columbia, Canada. The company was founded in 2009 and is headquartered in Denver, Colorado.