Natsionalna Elektricheska Kompania NEK is the Bulgaria

Bulgaria

Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...

n national electricity

Electricity

Electricity is a general term encompassing a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena, such as lightning, static electricity, and the flow of electrical current in an electrical wire...

 distributing company also being the second largest company in Bulgaria

Bulgaria

Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...

. At the end of 2005 NEK had 31 hydro

Hydroelectricity

Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy...

 power plants with a total installed capacity of 2,563 MW and an electricity generation capacity of 3,544 GW·h.

The company also operates 14,610 km of overhead lines and has 279 substations; the total amount of electricity sales in 2005 were 34,171 GWh. It is a subsidiary of Bulgarian Energy Holding EAD

Bulgarian Energy Holding EAD

Bulgarian Energy Holding EAD is a state owned energy holding company in Bulgaria. It was incorporated on 18 September 2008 after renaming Bulgargaz Holding EAD...

, together with the gas company Bulgargaz

Bulgargaz

Bulgargaz is a Bulgarian natural gas distributing company, the largest in the country. It is a subsidiary of Bulgarian Energy Holding EAD. The holding company was established on 18 September 2008 and Bulgargaz became its daughter company. In November 2009, the Bulgarian Government decided to list...

, NEK EAD, Kozloduy nuclear power plant

Kozloduy Nuclear Power Plant

The Kozloduy Nuclear Power Plant is a nuclear power plant in Bulgaria situated north of Sofia and east of Kozloduy, a town on the Danube river, near the border with Romania. It is the country's only nuclear power plant and the largest in the region...

, Maritza-Iztok II thermal power plant

Maritsa Iztok Complex

The Maritsa Iztok Complex is the largest energy complex in South Eastern Europe. It is located in Stara Zagora Province, south-central Bulgaria. It consists of three lignite-fired thermal power stations. The complex is located in a large lignite coal basin, which includes several mines, enrichment...

, and the Mini Maritza Iztok (Maritza Iztok mines). In November 2009, the Bulgarian Government decided to unbundle the transmission system operator ESO and to list NEK at the Bulgarian Stock Exchange - Sofia

Bulgarian Stock Exchange - Sofia

The Bulgarian Stock Exchange – Sofia is a stock exchange operating in Sofia, the capital of Bulgaria. It was originally founded as Sofia Stock Exchange on 15 April 1914 through a tsar's decree, but ceased to operate after the Second World War as Bulgaria became a communist state...

.