CJSC Transmashholding is the largest manufacturer of locomotives and rail equipment in Russia and after merging with LocoTech service the fourth largest engineering company in the field of transport technology globally.

The Kolomna Locomotive Works is a major producer of railway locomotives as well as locomotive and marine diesel engines in Russia. The plant started production in 1869 with a freight steam locomotive, one of the first in Russia. In the Russian Empire, Kolomna was one of the few producers in Russia. During this period, 139 types of steam locomotives were designed. As of 2015, the company is now a part of Transmashholding.