M.A. Mortenson Company

[3] As of 2014, the company had built over 150 entertainment and sports venues in the United States;[4] by 2018, that number had grown to 170, at a valuation of $11 billion, which made Mortenson the second largest sports arena builder in the country;[5] and by 2023, more than 230 such venues had been built, valued at $15 billion.

[6] Its most recent completed sports stadium project is the $1.9 billion Allegiant Stadium, home to the Las Vegas Raiders and UNLV Rebels football team, and slated for 2024 is a proposed $1.5 billion ballpark, also in Las Vegas, that will house the relocated Oakland Athletics.

[6] Mortenson Construction is also active in the field of renewable energy, having started in 1995 with a single wind turbine.

[8] One of the largest projects is the construction of the solar power plants Solar Star I and II in Rosamond, California with a total of 597 MW of output that can generate electricity for 255,000 households.

The company was founded in Richfield, Minnesota in April 1954 by M. A. Mortenson, Sr., formerly a vice president with the D'Arcy Leck Construction Co.[9] While with D'Arcy Leck, Mortenson had supervised the construction of several local schools, a veterinary building on the farm campus of the University of Minnesota, and other industrial and commercial sites.