As of Aug 4, 2026, ChatGPT is owned by OpenAI LP, the company that developed...

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

As of Aug 4, 2026, ChatGPT is owned by OpenAI LP, the company that developed the product. While OpenAI LP runs the day-to-day work on ChatGPT, overall governance control lies with the OpenAI board and associated limited partners