Evergy is an American investor-owned utility with publicly traded stock that has its headquarters in Topeka, Kansas, and in Kansas City, Missouri. The company was formed from a merger of Westar Energy of Topeka and Great Plains Energy of Kansas City, Missouri, parent company of Kansas City Power & Light. Evergy is the largest electric company in Kansas, serving more than 1,000,000 residential, commercial and industrial customers in the eastern half of the state. Evergy has a generating capacity of 16,000 megawatt electricity from its over 40 power plants in Kansas and Missouri. Evergy service territory covers 28,130 square miles in east Kansas and west Missouri. Evergy owns more than 13,700 miles of transmission lines and about 52,000 miles of distribution lines.