TGC-1 (also referred as TGK-1; full name: Territorial generating company number 1; Russian: ТГК-1, Territorial’naya generiruyushchaya kompaniya No 1; traded as MCX: TGKA) is a regional power company operating in North-West Russia.

The company has its headquarters in Saint Petersburg with branches in Karelia and Kola.

Formation of the new company was announced on 1 March 2005 by Lenenergo, Kolenergo and RAO UES.

[2] The company was officially registered on 25 March 2005 and began to operate on 1 October 2005.

TGC-1 includes the following subsidiaries: JSC Murmanskaya CHPP (power supply of Murmansk and surrounding areas, share in authorised capital — 98.85%), JSC St. Petersburg Heating Grid (connection of heating networks in the area of operation of the Company's CHPPs, share in authorised capital of 65.58%), 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%) and TGC-Service LLC (specialised repair company, share in authorised capital - 26%).