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

https://telegra.ph/Is-the-Amazon-Roughly-5-OpenAI-Stake-Confirmed-or-Just-Reported-08-09

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