Mechanical engineering companies of Russia

Rostselmash () was a Russian agricultural equipment company, based in Rostov-on-Don. Founded in 1929, it primarily produces combine harvesters. The company income in 2005 was around 400 million dollars. The company name is a syllabic abbreviation of '''Rostovskiy zavod sel'skokhozyaystvennykh mashin''' (), the Rostov factory for agricultural machines.

JSC Ruselectronics (, also AO Roselektronika) also known as Rosel (), is a Russian state-owned holding company founded in 1997. It is fully owned by Rostec.

Atomenergomash JSC (AEM Group) (, AEM Holding company) is a Russian power engineering company, a supplier of products for nuclear and thermal power plants, natural gas and petrochemical industry, shipbuilding, and special steel markets. It is the mechanical engineering division of Rosatom. Together with its subsidiaries it employees more than 17,000 people.

Titan-Barrikady () is a military-industrial company based in Volgograd, Russia. It was formed in 1914, after the merger between the Barrikady Production Association and the Titan Design Bureau. It is a subsidiary of the Moscow Institute of Thermal Technology.