In October 2007 E.ON acquired a majority stake in OGK-4; giving the company around 8,630 MW of comparatively modern and efficient generating capacity in fast-growing, heavily industrialized regions of Russia: Urals, Western Siberia, Volga, and Central Russia.

OGK-4 is one of the six thermal OGKs established during the course of the Russian electricity sector reform. OGK-4 was incorporated on 4 March 2005 and completed the process of its corporate reorganization in July 2006.

The Company is focused on the following core businesses:

• generation and wholesale of electricity; and
• generation, transmission and sale of heat power.

OGK-4 is headquartered in Moscow. Following the consolidation of generating assets portfolio, it operates five power generation plants throughout Russia, namely Surgutskaya GRES-2 (4,800 MW, Surgut, Tyumen region), Berezovskaya GRES (1,500 MW, Sharypovo, Krasnoyarsk territory), Shaturskaya GRES (1,100 MW, Shatura, Moscow region), Smolenskaya GRES (630 MW, Ozerny, Smolensk region) and Yayvinskaya GRES (600 MW, Yajva, Perm territory), each of which has been a branch of the Company since 1 July 2006.

Total installed generation capacity of the Company is 8,630 MW that accounts for about 3.9 percent of Russia’s total installed generation capacity and for approximately 5.75 percent of Russia’s total installed thermal generation capacity. Annually, OGK-4 produces and sells more than 50 TW hour of electricity and approximately two million Gcal of heat.