OpenAI Invests $400 Million in Early-Stage AI as Sole Investor

U.S. regulatory filings indicate that an investment firm affiliated with OpenAI has established the OpenAI Startup Fund II. The fund filed Form D with the U.S. Securities and Exchange Commission on August 26, 2026, reporting $400 million in raised and sold equity interests, with the first sale occurring on August 11. According to the filing, there was one investor, but their identity remains undisclosed, making it currently impossible to confirm whether OpenAI is the sole contributor. The OpenAI Startup Fund was founded in 2021 and primarily invests in early-stage AI companies capable of generating broad impact. Its website lists focus areas including healthcare, law, education, energy, infrastructure, and science. This declaration provides no further details regarding the specific investment scope of Fund II, deployment plans, or the capital contribution relationship between OpenAI and this fund.