SEC filing: OpenAI invests ~$400M in its second startup fund, after it raised $175M for its first fund in 2021 from outside investors, including Microsoft (Sarah Klearman/Wall Street Journal)

OpenAI disclosed a $400 million investment into its second startup fund, following the $175 million raised for its inaugural fund in 2021, which included contributions from Microsoft. The filing indicates the new fund will continue backing early-stage AI ventures, expanding the company’s venture-capital portfolio.