KTM AG (the former KTM Sportmotorcycle AG) is an Austrian motorcycle and sports car manufacturer owned by KTM Industries AG and Indian manufacturer Bajaj Auto. It was formed in 1992 but traces its foundation to as early as 1934 when an Austrian engineer Johann Hans Trunkenpolz set up a fitter's and car repair shop in Mattighofen. In 1937, he started selling DKW motorcycles, and Opel cars the following year. His shop was known as Kraftfahrzeug Trunkenpolz Mattighofen.
After the war, demand for repair works fell sharply and Trunkenpolz started thinking about producing his own motorcycles. The prototype of his first motorcycle, the R100, was built in 1951.
KTM is known for its off-road motorcycles (enduro, motocross and supermoto).