As of Aug 4, 2026, ChatGPT is owned by OpenAI LP, which holds the product...

https://stateofseo.com/does-microsoft-own-chatgpt-or-just-invest-in-openai/

As of Aug 4, 2026, ChatGPT is owned by OpenAI LP, which holds the product rights and day-to-day operations. However, governance control rests with the OpenAI Board and key investors who influence major decisions