 CJSC Transmashholding (TMH), a holding company owned partially by Makhmudov, is Russia's largest producer of rolling stock for railways and subways.The company owns plants in St. Petersburg, Bryansk, Penza, and the Moscow, Rostov and Tver regions.In November 2012, it was announced that TMH had increased its net profit by 9 percent to 2.69 billion rubles.