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

https://emiliosbestinsights.rivetgarden.com/posts/softbank-openai-stake-how-does-the-13-claim-work

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