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

https://www.bokkmarking-signs.win/curious-about-who-owns-chatgpt-as-of-2024-openai-is-the-company-behind

ChatGPT is owned by OpenAI, with its governance overseen by the OpenAI Foundation as of 2024. Microsoft holds a significant investment stake but does not own or control the company