Leaked OpenAI Cap Table Names Microsoft as Largest Shareholder, Reveals Ashton Kutcher Investment Gains
OpenAI has gradually evolved from a nonprofit research organization into a commercial operation, while comprehensive information about its ownership and investor allocations has long remained unavailable to the public. A leaked cap table shows Microsoft as the largest shareholder with a stake of about 26.79%. Sound Ventures, the venture capital firm co-founded by actor Ashton Kutcher, is also listed, underscoring how technology giants and early-stage investors have positioned themselves in generative AI.
As of July 2026, the OpenAI cap table circulating online offered further details about investor holdings. Based on OpenAI's latest valuation of $852 billion, Sound Ventures' early investment has risen in book value to about 43 times its original cost. However, neither the source of the table nor the ownership figures have been formally confirmed by OpenAI, Microsoft or Sound Ventures.
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The history behind this eventOpenAI President Brockman Reveals Nearly $30 Billion Stake and Ties to Private Investments
OpenAI was founded in 2015 as a nonprofit artificial intelligence research organization. Elon Musk says he donated $38 million and is now suing the company for abandoning its public-interest mission in favor of profit, seeking $150 billion from OpenAI, Sam Altman and Greg Brockman. The case centers on whether insiders profited from the transition and whether the company’s governance was legitimate.
OpenAI President Greg Brockman testified in federal court in Oakland, California, on May 4, 2026, acknowledging that his stake, acquired without investing any of his own money, was worth nearly $30 billion. He also disclosed that he received a $10 million interest from Sam Altman’s family office in 2017 and holds stakes in AI chipmaker Cerebras and nuclear fusion startup Helion Energy.
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