Avangrid (formerly Iberdrola USA) is an energy and utility company with holdings in regulated utilities, electricity generation, and natural gas storage. It distributes electricity and natural gas to more than 3 million customers in the US northeast through Central Maine Power, New York State Electric & Gas, and Rochester Gas and Electric. Avangrid is also active in electricity generation via wind power and owns or operates natural gas storage and hub service facilities, primarily in the southern and western US. The former Iberdrola USA was combined with UIL Holdings in late 2015 and spun off by Iberdrola as Avangrid.