ChatGPT is owned by OpenAI, the company behind its development. The OpenAI...

https://wiki-mixer.win/index.php/Why_OpenAI_Separates_Economic_Ownership_From_Corporate_Control

ChatGPT is owned by OpenAI, the company behind its development. The OpenAI Foundation oversees governance to guide its mission and ethical use. While Microsoft is a major investor and partner, it does not own ChatGPT or control OpenAI