WEC Energy Group Inc., based in Milwaukee, Wisconsin, provides electricity and natural gas to 4.4 million customers across four states. The company operates through its brands – We Energies, Wisconsin Public Service, Peoples Gas, North Shore Gas, Michigan Gas Utilities, Minnesota Energy Resources and Upper Michigan Energy Resources.
WEC Energy Group's headquarters is located at 231 W. Michigan Street in Milwaukee.
On 29 July 2015, the company completed its acquisition of Integrys Energy Group in a deal worth $9.1 billion.