OGK-1
OGK-1 was a Russian wholesale electricity-generation company created through the consolidation of six large power stations and later merged into Inter RAO.
Last updated August 24, 2026
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Overview
OGK-1, formally known as the First Generation Company of the Wholesale Electricity Market, was a Russian power-generation company created during the restructuring of the country's electricity industry. It was established in 2005 by combining six generating assets that had previously operated within the system associated with RAO UES, the state-controlled electricity holding company. The consolidation was intended to create a large generation company capable of operating in the emerging wholesale electricity market and participating in the broader reform of Russia's electricity sector. The company controlled a geographically dispersed portfolio of thermal power stations. Its principal assets included Permskaya GRES, Nizhnevartovskaya GRES, Iriklinskaya GRES, Kashirskaya GRES, Verkhne-Tagilskaya GRES, and Urengoyskaya GRES. Together, these plants had installed capacity of approximately 9,500 megawatts. The portfolio included large stations serving industrial and regional electricity demand, as well as a much smaller generating facility at Urengoy. In 2006, the company's plants produced approximately 48 terawatt-hours of electricity, according to the Wikipedia account of the company. OGK-1's ownership and governance changed as Russia implemented its electricity-market reform. Until 1 July 2008, RAO UES held approximately 92 percent of the company's shares. Following the reform and the reorganization of RAO UES, approximately 43 percent of OGK-1 was transferred to the Federal Grid Company of Russia, 23 percent to RusHydro, and the remaining 34 percent was distributed among minority shareholders. This arrangement reflected the separation of generation, transmission, and other electricity-industry functions that accompanied the reform. A further change occurred in March 2009, when the rights associated with 61.9 percent of OGK-1's voting shares were transferred to Inter RAO UES for five years, with an extension option. From 6 July 2009, Inter RAO UES also assumed the powers of OGK-1's sole executive body. This gave Inter RAO substantial operational and strategic influence over the company without immediately eliminating OGK-1 as a separate corporate entity. OGK-1's independent existence was short-lived. In 2012, it was merged into Inter RAO. The merger concluded the company's development as a separate generation-company brand and folded its assets and activities into the larger Russian electricity group. OGK-1 is therefore best understood historically as one of the major generation companies formed during the post-Soviet restructuring of Russia's electricity sector, rather than as an active standalone brand today.
History
OGK-1 emerged from the restructuring of Russia's electricity industry in the mid-2000s. The reform sought to separate electricity generation from transmission and other functions historically concentrated within RAO UES, the country's state-controlled electricity holding company. As part of this process, six generating companies or power-station assets were consolidated in 2005 into a new entity known as the First Generation Company of the Wholesale Electricity Market, commonly abbreviated as OGK-1. The new company operated a broad portfolio of thermal power stations distributed across Russia. Its generating assets were Permskaya GRES, Nizhnevartovskaya GRES, Iriklinskaya GRES, Kashirskaya GRES, Verkhne-Tagilskaya GRES, and Urengoyskaya GRES. Their combined installed capacity was approximately 9,500 MW. This made OGK-1 one of the significant generation companies formed during the reform. The company reported approximately 48 TWh of power output from its plants in 2006, illustrating the scale of its operating portfolio. Before the principal ownership transition associated with the reform, RAO UES held about 92 percent of OGK-1's shares. On 1 July 2008, the ownership structure changed. Approximately 43 percent of the shares was transferred to the Federal Grid Company of Russia, approximately 23 percent to RusHydro, and approximately 34 percent was distributed to minority shareholders. The change reflected the redistribution of assets and ownership interests as the former integrated electricity holding structure was dismantled. OGK-1 subsequently came under the substantial influence of Inter RAO UES. On 17 March 2009, rights associated with 61.9 percent of OGK-1's voting shares were transferred to Inter RAO for a five-year period, with the possibility of extension for an equivalent period. From 6 July 2009, the authority of OGK-1's sole executive body was transferred to Inter RAO UES. This arrangement connected OGK-1's management and strategic direction to a larger electricity group while the company still existed as a distinct legal and operational entity. The separate company was ultimately short-lived. In 2012, OGK-1 was merged into Inter RAO. The merger ended OGK-1's independent corporate history and integrated its generating assets into Inter RAO's broader portfolio. Consequently, OGK-1 is now a historical corporate brand associated with the formation, ownership transition, and consolidation of Russian wholesale electricity generators during the country's electricity-market reform.
- 2012
Merger into Inter RAO
[1]OGK-1 is merged into Inter RAO and ceases to operate as a separate company.
- 2009
Inter RAO assumes voting and executive authority
[1]Inter RAO receives rights associated with 61.9 percent of voting shares and later takes over the powers of OGK-1's sole executive body.
- 2008
Post-reform ownership redistribution
[1]After the RAO UES reform, shares are allocated among the Federal Grid Company of Russia, RusHydro, and minority shareholders.
- 2006
Generation output reaches approximately 48 TWh
[1]The company's power stations produce around 48 terawatt-hours of electricity during the year.
- 2005
OGK-1 is established
[1]OGK-1 is formed by combining six Russian electricity-generation companies or power-station assets.
Products and positioning
A large, multi-station Russian wholesale electricity generator created through industry consolidation and positioned within the electricity-market reform that followed the restructuring of RAO UES.
Electricity generation · 2005
Wholesale electricity
OGK-1's principal commercial output was electricity generated by its portfolio of large Russian power stations. The company was created as a generation business serving the wholesale electricity market rather than as a consumer-facing retail electricity brand. Its scale came from combining six stations with approximately 9,500 MW of installed capacity.
Power generation · 2005
Thermal power generation
The operating portfolio consisted of thermal generating stations, including Permskaya GRES, Nizhnevartovskaya GRES, Iriklinskaya GRES, Kashirskaya GRES, Verkhne-Tagilskaya GRES, and Urengoyskaya GRES. These assets supplied electricity at utility scale across several Russian regions.
Brand decisions
2012
Merger into Inter RAOM&ABackground
Inter RAO had already acquired significant governance influence over OGK-1 through voting rights and executive authority.
Action taken
OGK-1 was merged into Inter RAO.
Aftermath
OGK-1 ceased to exist as an independent company and its generation assets became part of Inter RAO's operations.
2009
Transfer of control to Inter RAOM&ABackground
Inter RAO sought operational and strategic control over OGK-1 as the Russian power sector continued to consolidate.
Action taken
Rights attached to 61.9 percent of OGK-1's voting shares were transferred to Inter RAO for five years, with an extension option; from 6 July, Inter RAO also exercised the powers of OGK-1's sole executive body.
Aftermath
OGK-1 remained a distinct company temporarily but operated under the substantial governance influence of Inter RAO.
2008
Redistribution of ownership after electricity-market reformStrategyBackground
RAO UES's restructuring changed the ownership and institutional organization of Russian electricity companies.
Action taken
OGK-1 shares were redistributed, with approximately 43 percent transferred to the Federal Grid Company of Russia, 23 percent to RusHydro, and 34 percent allocated to minority shareholders.
Aftermath
RAO UES no longer held its former approximately 92 percent controlling position, and OGK-1 entered a more dispersed post-reform ownership structure.
2005
Consolidation of six generating assetsStrategyBackground
Russia's electricity-sector restructuring created separate generation companies from assets formerly associated with the integrated RAO UES system.
Action taken
Six generation companies or power-station assets were combined to establish OGK-1 as a large wholesale-market generator.
Aftermath
The consolidation gave OGK-1 a portfolio of approximately 9,500 MW and made it one of the major generation companies created during the reform.
Sources1 sources
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