CalAtlantic Group, Inc. was a home construction company based in Arlington, Virginia. As of 2018, it was the 4th largest homebuilder in the United States.[2] The company built homes for more than 113,000 families during its 46-year history.[3] In February 2018, the company was acquired by Lennar Corporation. The company’s homes and target buyers varied widely. It operated in many of the largest housing markets in the country including California, Florida, Arizona, The Carolinas, Texas, Colorado, and Nevada.[1] The company developed subdivisions within urban metropolitan areas, as well as smaller groupings of new homes, and single homes such as rural ranch properties. The company was operated via various regional divisions representing different parts of the United States.

D. R. Horton, Inc. is a home construction company incorporated in Delaware and headquartered in Arlington, Texas. In 2017, the company was the largest home builder in the United States based on the number of homes closed.[2] As of 2018, the company is ranked 211th on the Fortune 500 list of the largest United States corporations by revenue.[3] The company operates in 78 markets in 28 states.[1] D. R. Horton operates three separately branded divisions: Emerald Homes, Express Homes, and Freedom Homes. Express Homes is tailored to entry-level buyers while the Emerald Homes brand is sold as luxury real estate. Freedom Homes caters to the active adult community, aged 55 and over.

Fluor Corporation is an American multinational engineering and construction firm headquartered in Irving, Texas. It is a holding company that provides services through its subsidiaries in the following areas: oil and gas, industrial and infrastructure, government and power. It is the largest engineering & construction company in the Fortune 500 rankings and is listed as 164th overall.[2] Fluor was founded in 1912 by John Simon Fluor as Fluor Construction Company. It grew quickly, predominantly by building oil refineries, pipelines and other facilities for the oil and gas industry, at first in California, and then in the Middle East and globally. In the late 1960s, it began diversifying into oil drilling, coal mining and other raw materials like lead. A global recession in the oil and gas industry and losses from its mining operation led to restructuring and layoffs in the 1980s. Fluor sold its oil operations and diversified its construction work into a broader range of services and industries. In the 1990s, Fluor introduced new services like equipment rentals and staffing. Nuclear waste cleanup projects and other environmental work became a significant portion of Fluor’s revenues. The company also did projects related to the Manhattan Project, rebuilding after the Iraq War, recovering from Hurricane Katrina and building the Trans-Alaska Pipeline System.

Lennar Corporation is a home construction and real estate company based in Miami, Florida. In 2017 the company was the largest home construction company in the United States after its purchase of CalAtlantic Homes. The company is ranked 230th on the Fortune 500 as of 2018. The company operates in 21 states[4] and owns Rialto Capital Management, the sponsor of six private equity funds that invest in real estate and an originator commercial mortgage loans for securitization. The company also developed and retains ownership interests in 53 apartment communities. The name Lennar is a portmanteau of the first names of two of the company’s founders, Leonard Miller and Arnold Rosen.

Kiewit Corporation is an employee-owned Fortune 500 contractor based in Omaha, Nebraska. Privately held, it is one of the largest construction and engineering organizations in North America. Recent projects have included several bridge retrofittings in the San Francisco Bay Area, Interstate H-3 project in Hawaii, rebuilding the spillway at Oroville Dam, and building the world’s largest geodesic dome at Henry Doorly Zoo in Omaha. Along with significant mining and off-shore operations, the company also contracts small grading (dirt moving) projects for residential or commercial development.