Gardner Denver Thomas GmbH Learn more FOSTEC & CompanyReferencesGardner Denver Thomas GmbH Gardner Denver, Inc. is the world’s leading manufacturer of compressors and vacuum pumps for the medical, industrial and energy markets. Its main headquarters is in Milwaukee, WI, USA. Gardner Denver is part of the private equity company Kohlberg Kravis Roberts & Co. (KKR). The company was founded in 1859 and is represented in 33 different countries. Industries: Industrial Goods Visit Website