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

https://lanesniceblog.scriblorax.com/posts/is-the-amazon-roughly-5-openai-stake-confirmed-or-just-reported

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