High Quality Content by WIKIPEDIA articles! National Grid PLC is an international, London-based utilities company which also operates in other countries, principally its wholly owned subsidiary in the United States. The company adopted its current name in July 2005 when shareholders agreed the change from National Grid Transco PLC. It is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index. In 1990, the transmission activities of the Central Electricity Generating Board were transferred to the National Grid Company plc, which was owned by the 12 Regional Electricity Companies (RECs) through a holding company, National Grid Group plc. In 1995, shares in this holding company were listed on the stock exchange. Within a year, most of the RECs had disposed of their interests.