Who is the biggest owner of OpenAI?

Who is the individual or organization that holds the largest stake in OpenAI, the leading AI research and development company? Are they a venture capitalist, a tech giant, or perhaps a philanthropic foundation? With OpenAI making significant strides in the field of artificial intelligence, it's intriguing to know who has the most influence over its direction and growth. Could this major shareholder potentially shape the future of AI and its impact on society?