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Metalloinvest Management Co. LLC produces and markets of hot-briquetted iron (HBI) and iron ore products. Its products include Head-Media Relationsn ore raw materials, metallics, steel products and other products. The company was founded by Alisher Usmanov in 1999 and is headquartered in Moscow, Russian Federation.

Oskolsky Electrometallurgicheskyi Kombinat OAO engages in the production of steel, iron ore, and related products. Its products include square billets, pipe billets, and long prodcuts. The company was founded in 1974 and is headquartered in Staryi Oskol, Russia.

PKF International Ltd. provides management consultancy services. It offers auditing, management consulting, financial planning, technology consulting, forensic accounting, corporate finance, tax and bankruptcy services. The company was founded in 1969 and is headquartered in London, the United Kingdom.

ER-Telecom Holding CJSC provides telecommunication services. Its services include Internet access, multiservice network, remote workplaces, video surveillance, video conferencing, transfer of technological data, telephony, and cable television. The company was founded in 2001 and is headquartered in Moscow, Russian Federation.

Metalloinvest Holding Co. JSC operates as a holding company with interests in the production and sale of iron ore products and ferrous metals. It operates through the following three segments: Mining, Steel and Trading. The Mining segment engages in production and sale of iron ore products and co-products. The Steel segment engages in production and sale of ferrous metal products. The Trading segment engages in overseas trading of the Group's products. The company was founded by Alisher Usmanov in 2006 and is headquartered in Moscow, Russia.

Baikal Mining Co. LLC engages in the development of Udokan copper deposit site. The company was founded on Novemeber 14, 2008 and is headquartered in Udokan, Russia.