National Grid plc transmits and distributes electricity and natural gas. It operates through UK Electricity Transmission, UK Gas Transmission, US Regulated, and National Grid Ventures (NGV) and Other segments. The UK Electricity Transmission segment owns and operates electricity transmission networks, which comprise approximately 7,236 kilometers of overhead lines. The UK Gas Transmission segment owns and operates gas transmission systems, as well as third-party independent systems and liquefied natural gas (LNG) storage facilities. The US Regulated segments owns and operates transmission facilities across upstate New York, Massachusetts, New Hampshire, Rhode Island, and Vermont; and electricity distribution networks in upstate New York, Massachusetts, and Rhode Island. Its assets comprise 14,439 kilometers of overhead lines; an electricity distribution network of approximately 117,498 circuit miles; and a network of approximately 57,551 kilometers of gas pipeline. The NGV and Other segment engages in the energy metering business; transporting renewable energy long distances through its electricity interconnectors; and storing LNG, as well as commercial property and insurance activities in the United Kingdom. The company was founded in 1990 and is headquartered in London, the United Kingdom.