The Boldt Company is a construction services company headquartered in Appleton, Wisconsin. The company was founded in 1889 by Martin Boldt and has since grown to become one of the largest construction firms in the United States. The company provides a wide range of construction services, including design-build, general contracting, and construction management. Boldt has completed projects in a variety of industries, including healthcare, education, industrial, and commercial. The company is known for its commitment to sustainability and has been recognized for its efforts in this area. Boldt is a privately held company and is still owned by the Boldt family.