WEC Energy Group is an American company based in Milwaukee, Wisconsin that provides electricity and natural gas to 4.4 million customers across four states.

It would have been the 10th largest investor-owned electric and gas utility company in the United States, based on market capitalization at that time of about US$6.0 billion.

On May 16, 1997, both CEOs announced that the boards of directors of both companies had terminated the merger plan because of approval delays by the U.S. Department of Justice, the SEC, and state regulators in Minnesota and Wisconsin.

[10] They also stated that regulatory agencies were changing their merger policies as they were considering the companies' filing and that further delay would reduce the benefits of the Primergy transaction.

The case was considered to be a bellwether in the utilities industry, putting an end to the rapid pace of mergers and acquisitions that had been ongoing up to then.