Alliant Energy Corporate Services, Inc. is a legal entity associated with Alliant Energy Corporation, a publicly traded utility holding company (NASDAQ: LNT) headquartered in Madison, Wisconsin. Founded in 1917, Alliant Energy is a component of the S&P 500. As of May 2026, the company has approximately 2,900 to 3,300 employees and an estimated annual revenue of around $4.4 billion. Its market capitalization is approximately $18.7 billion.
Alliant Energy primarily provides regulated electric and natural gas services to approximately 1 million electric and 430,000-435,000 natural gas retail customers across Iowa and Wisconsin through its utility subsidiaries, Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL). The company's operations include the generation and distribution of electricity, utilizing a diverse portfolio of fuel sources such as coal, natural gas, wind, and solar, as well as the distribution and transportation of natural gas. Alliant Energy also operates non-regulated businesses, including Travero™, which offers supply chain solutions.
In terms of patent litigation, Alliant Energy Corporate Services, Inc. appears to operate as an operating company that defends against patent infringement claims. The company has been named as a defendant in one tracked patent litigation case and has no record of initiating lawsuits as a plaintiff. This posture is consistent with an operating entity being targeted rather than a patent assertion entity.
The company's sole tracked case is Midwest Energy Emissions Corp. et al. v. Berkshire Hathaway Energy Company et al., filed in the Southern District of Iowa in July 2024. Alliant Energy Corporate Services, Inc. is listed as a defendant in this lawsuit.