Wisconsin Power & Light Co.

Wisconsin Power & Light Co. (WPL) is a public utility company headquartered in Madison, Wisconsin. Founded in 1924 through the merger of six rural power companies, WPL is a wholly-owned subsidiary of Alliant Energy Corporation (NASDAQ: LNT), a public utility holding company. Alliant Energy, its parent company, reported approximately 2,948 employees and $4 billion in operating revenues at year-end 2025.

WPL is primarily engaged in the generation and distribution of electricity and the distribution and transportation of natural gas in select markets across southern and central Wisconsin. The company provides electric utility services to approximately 500,000 retail customers and transports natural gas to about 200,000 retail customers in Wisconsin. WPL owns a portfolio of electric generating units in Iowa, Wisconsin, and Minnesota, utilizing a diversified fuel mix including coal, natural gas, and renewable resources.

Based on the provided case data, Wisconsin Power & Light Co. appears to be an operating company that has been involved in patent litigation as a plaintiff. The company has one tracked case, "Wisconsin Power & Light Co. et al. v. Birchtech Corp.," in which it is listed as a plaintiff before the Patent Trial and Appeal Board. This single plaintiff case suggests a posture of asserting its own intellectual property rather than primarily defending against infringement claims.