Terrion is the trade name of the ATM (AgroTechMash) Group, a Russian agricultural manufacturer. ATM was formed in 1997 as a sales and marketing firm, and represented the Kirovets line of four-wheel drive tractors. ATM developed a line of row-crop tractors in 2003 which were sold alongside the Kirovets tractors. In 2008, ATM and Kirovets separated and ATM opened a separate factory, creating the Terrion brand.
Terrion - official site