After the merger with UIL, the company will have about 3.1 million customers in New York and New England. Iberdrola USA is owned by Iberdrola SA of Spain. Notes References External links UIL Holdings Corporation http://www.uil.com The United Illuminating Company http://www.uinet.com Berkshire Gas Company http://www.berkshiregas.com Connecticut Natural Gas Corporation http://www.cngcorp.com/ Southern Connecticut Gas Company http://www.soconngas.com/ Companies listed on the New York Stock Exchange Energy companies of the United States