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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 for use in the infrastructure projects, and nonresidential and residential construction markets, as well as in the railroad, agricultural, utility, and environmental industries. The company also produces magnesia-based chemicals products; dolomitic lime primarily to customers for steel production and soil stabilization; and cement treated materials. 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.

Primoris Services Corporation, a specialty contractor company, provides a range of specialty construction, fabrication, maintenance, replacement, and engineering services in the United States and Canada. The company operates through Utilities and Energy/Renewables segments. The Utilities segment offers installation and maintenance services for new and existing natural gas distribution systems, electric utility distribution and transmission systems, and communications systems. The Energy/Renewables segment provides a range of services, including engineering, procurement, and construction, as well as retrofits, highway and bridge construction, demolition, site work, soil stabilization, excavation, flood control, upgrades, repairs, outages, and maintenance services to renewable energy and energy storage, renewable fuels, petroleum, and petrochemical industries, as well as state departments of transportation. It also offers pipeline construction and maintenance, and storage services; pipeline facility, and integrity services. Primoris Services Corporation was founded in 1960 and is headquartered in Dallas, Texas.

Sunrise Senior Living, Inc. (Sunrise) is a provider of senior living services in the United States, Canada and the United Kingdom. The Company offers a range of personalized senior living services, including independent living, assisted living, care for individuals with Alzheimer's and other forms of memory loss, nursing and rehabilitative care. At December 31, 2011, it operated 311 communities, including 269 communities in the United States, 15 communities in Canada and 27 communities in the United Kingdom, with a total unit capacity of approximately 30,733. In January 2013, Health Care REIT, Inc acquired Sunrise Senior Living, Inc. property portfolio. The Company also announced the sale of its management business to an entity formed by affiliates of Kohlberg Kravis Roberts & Co. L.P., affiliates of Beecken Petty O'Keefe & Company and Health Care REIT.

Xtierra Inc., a natural resource company, engages in the exploration and development of precious and base metal deposits in Mexico. It primarily explores for zinc, silver, lead, copper, gold, and mercury deposits. The company holds 100% interest in the Bilbao project located to the northwest of Mexico City in the southeastern part of the State of Zacatecas; and the Laguna silver-gold-mercury project. Xtierra Inc. is headquartered in Toronto, Canada.