The story
Kansas Gas Service was formed in 1997 when ONEOK purchased the natural gas assets of Western Resources (now Evergy). However, it traces its history to the former natural gas subsidiaries of Kansas Gas & Electric and Kansas Power & Light, the two companies that merged to form Western Resources in 1992. At one time, it also served portions of Missouri and Oklahoma. Parts of Kansas Gas Service were joined with the former Missouri Gas Service, together being The Gas Service Company until being purchased by Kansas Power and Light in the late 1980s.
From Wikipedia’s article on Kansas Gas Service, shared under CC BY-SA 4.0.3