WOLF Performance Ammunition is a registered trademark owned by SSI Manufacturing Technologies, a corporation in the United States. The ammunition is mostly manufactured by Tulskiy Patronniy Zavod (Tula Cartridge Plant) in Tula, Tula District, Russia. Some .22-caliber rimfire ammunition is made by SK Jagd und Sportmunitions Gmbh (SK Hunting- and Sporting-Ammunition) of Schönebeck, Salzlandkreis, Saxony-Anhalt, Germany.