ChatGPT is owned by OpenAI, with the OpenAI Foundation overseeing its...

https://uniform-wiki.win/index.php/Who_Actually_Controls_OpenAI_if_Investors_Own_Shares%3F

ChatGPT is owned by OpenAI, with the OpenAI Foundation overseeing its governance as of early 2024. Microsoft is a significant investor supporting its development but does not own or control ChatGPT