Defendant
5 cases as defendant.
Evergy, Inc. is a publicly traded electric utility company headquartered in Kansas City, Missouri, with operating headquarters also in Topeka, Kansas. Formed in 2018 through the merger of Westar Energy and Great Plains Energy, its historical roots extend to predecessor companies founded in 1881 and 1882. Trading on Nasdaq under the ticker EVRG, Evergy is an S&P 500 component with a market capitalization of approximately $19.0 billion as of May 2026. The company reported a trailing twelve-month revenue of approximately $6.031 billion as of March 31, 2026, and employs around 4,691 individuals.
Evergy operates as a regulated electric utility, providing electricity generation, transmission, and distribution services. It serves over 1.7 million residential, commercial, and industrial customers across eastern Kansas and western Missouri. The company manages a diverse portfolio of over 40 power plants, with a generating capacity of 16,000 megawatts, utilizing sources such as wind, solar, natural gas, coal, and nuclear. Evergy is recognized as one of the largest wind energy suppliers in the United States, with approximately half of its supplied power coming from clean sources.
In terms of patent litigation, Evergy, Inc. maintains a defensive posture. The company has been involved in one tracked case within our database, appearing solely as a defendant. This indicates that Evergy is an operating company that defends against patent infringement claims rather than initiating them.
The single tracked litigation involving Evergy is Midwest Energy Emissions Corp. et al. v. Berkshire Hathaway Energy Company et al., where Evergy is listed as a defendant. This case was filed in the Southern District of Iowa in July 2024.
Midwest Energy Emissions Corp. and Birchtech Corp. sued Evergy, Inc. and Evergy Kansas Central, Inc., asserting US Patent 10668430. The case experienced multiple transfers and partial dismissals, with claims against Evergy Kansas Central, Inc. ultimately consolidated into MDL No. 3132 and the case terminating on September 24, 2025.
A patent infringement suit by Midwest Energy Emissions Corp. and Birchtech Corp. against Evergy entities, initially filed in the Southern District of Iowa, later transferred and consolidated into a multidistrict litigation.
An infringement suit filed by Birchtech Corp. against Evergy, Inc. et al. concerning US patent 10933370, which was transferred to the U.S. District Court for the Southern District of Iowa, likely as part of the ongoing MDL.
This Multidistrict Litigation consolidates several cases involving US Patent 10668430, initiated by Midwest Energy Emissions Corp. (now Birchtech Corp.) against numerous energy companies. The MDL is open, and various motions have been addressed.
This multidistrict litigation consolidates several patent infringement lawsuits initially filed in Arizona, Missouri, and Iowa. Some defendants have reached license agreements with Birchtech, and claims against other defendants have been resolved.