ChatGPT is owned by OpenAI, with governance overseen by the OpenAI Foundation....

https://www.bookmark-jungle.win/as-of-aug-4-2026-chatgpt-is-owned-by-openai-a-company-with-a-852-billion

ChatGPT is owned by OpenAI, with governance overseen by the OpenAI Foundation. While Microsoft is a major investor and partner, it is not the parent company