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

https://echo-wiki.win/index.php/Did_OpenAI_Say_Sam_Altman_Got_No_Equity_in_2025%3F_Untangling_Ownership_Myths_and_the_OpenAI_Recapitalization_Disclosure

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