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

https://andressuniquechat.cloudhinter.com/posts/can-openai-change-its-governance-in-an-ipo

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