Gaz de France (GDF) was a French company which produced, transported and sold natural gas around the world, especially in France, its main market. The company was also particularly active in Belgium, the United Kingdom, Germany, and other European countries. Through its part-owned Belgian subsidiary SPE it was also involved in nuclear power generation. The company conducted a merger of equals with fellow utility company Suez on 22 July 2008 to form GDF Suez. Its head office was located in the 17th arrondissement of Paris.