STEYR Tractors Factory - Production In Austria (St. Valentin Plant). Steyr Tractor (properly called Steyr Landmaschinentechnik AG) is an Austrian agricultural machinery manufacturer. The company was founded in 1864 in St. Valentin, Austria, and manufactures tractors .It was part of the Steyr-Daimler-Puch conglomerate from 1934 until 1990 and was purchased by Case Corporation in 1996. Case IH and New Holland merged in 1999 to form CNH Global, which in turn merged with Fiat Industrial in 2012 to form CNH Industrial. Sankt Valentin is STEYR global headquarter, and is where the biggest majority of our machines are produced. Every year, thousands of visitors come to visit us, in order to discover how STEYR tractors are brought to life.