DEUTZ AG engages in the development, design, manufacture, distribution, and servicing of diesel engines for professional applications. It operates through the following segments: DEUTZ Compact Engines, DEUTZ Customized Solutions, and Other. The DEUTZ Compact Engines segment comprises of water-cooled and oil-cooled diesel engines with capacities of up to eight liters. The DEUTZ Customized Solutions segment specializes in air-cooled engines and large liquid-cooled engines with capacities of more than eight liters. The Other segment contains operations that do not belong in any other segment. The company was founded by Eugen Langen and Nicolaus August Otto on March 31, 1864 and is headquartered in Cologne, Germany.