ChatGPT is owned by OpenAI, the organization that developed the AI platform....

https://kilo-wiki.win/index.php/121_How_Do_I_Answer_Who_Owns_ChatGPT_on_Social_Media

ChatGPT is owned by OpenAI, the organization that developed the AI platform. The OpenAI Foundation oversees governance to guide its mission and ensure responsible use. Microsoft is a significant investor and partner but does not own or control ChatGPT