TGC-1 is the leading producer of electricity and heat in the North-West region of Russia. It operates 52 electric generating stations in four regions of Russia: St. Petersburg, Republic of Karelia, Leningrad Oblast, and Murmansk Oblast. The installed electric capacity of the сompany’s stations amounted to 6,9 GW and heating capacity of 13,52 thous GCal/hr.

Unlike other Russian generating companies, TGC-1 has a unique structure of production assets: hydro generation accounts for 40% of installed capacity, with total capacity of 3,000 MW.

The Company includes 12 cogeneration plants with a total capacity of 4,000 MW. These are strategic sources of heat energy for the population and industry of St. Petersburg, Petrozavodsk, Murmansk, Kirovsk city in Leningrad Oblast and Apatity and Kirovsk in Murmansk Oblast. The Company’s share of the heat energy market is about 50% in St. Petersburg, 100% in Petrozavodsk, 72% in Murmansk, and 100% in Apatity and Kirovsk of the Murmansk Oblast. Most of CHPPs operate on ecological gas fuel.

TGC-1 includes the following subsidiaries: JSC Murmanskaya CHPP (power supply of Murmansk and surrounding areas, share in authorised capital — 98.87%), JSC St. Petersburg Heating Grid (connection of heating networks in the area of operation of the Company's CHPPs, share in authorised capital of 60.52%), as well as dependent companies of JSC HHC (transfer of heat energy from the Apatitskaya CHPP to consumers in the city of Kirovsk, with a share in authorised capital of 50%).

TGC-1 is one of the largest investors in the region. In its investment activity, the Company’s primary focus is on projects aimed at environmental protection, improving energy efficiency and environmental safety of power facilities.

TGC-1’s shares are traded in the main trading area of the Russian securities market the Moscow Exchange. Securities trades are affected on the securities market of the Moscow Exchange in two sectors: Main market and Classica. TGC-1’s shares are included in the "Level 1" Quotation List.

Major shareholders are Gazprom Energoholding LLC (51.79%) and Fortum Power and Heat Oy (29.99%).