OpenAI Launches $400M Second Startup Fund Entirely from Its Own Balance Sheet
Summary
- • OpenAI filed with the SEC for a $400M second startup fund targeting early-stage AI companies.
- • OpenAI is the sole investor — no outside capital from Microsoft or other LPs, unlike the first fund.
- • First fund raised $175M in 2021 entirely from external investors including Microsoft; OpenAI contributed nothing.
- • First fund portfolio includes Cursor (recently acquired by OpenAI) and Harvey, validating the investment thesis.
Details
Fund II size: $400M from OpenAI alone
OpenAI Startup Fund II raised $400 million, more than double the $175M raised for the first fund in 2021.
OpenAI is sole LP — no outside investors
OpenAI funds the vehicle entirely from its own balance sheet. This is a structural shift: the first fund raised capital entirely from outside investors including Microsoft, with OpenAI contributing nothing.
First fund relied on Microsoft and others
The 2021 first fund raised $175M from external investors including Microsoft. OpenAI contributed no capital to that vehicle, making the self-funded second fund a significant governance change.
SEC Form D filed August 26, 2026
OpenAI Startup Fund II, L.P. — a Delaware limited partnership — filed a Form D with the SEC on August 26, 2026, with a first sale date of August 11, 2026.
First fund portfolio: Cursor and Harvey
The first fund backed Cursor (acquired by OpenAI this month) and Harvey, demonstrating the fund's ability to identify high-value early-stage AI companies.
Investment focus: early-stage AI companies
The fund targets early-stage AI companies, positioning OpenAI as a strategic venture investor shaping the next generation of AI startups.
Details compiled via Grok live web research
Additional fund details including SEC filing specifics and portfolio company names sourced via Grok live web research from WSJ, Dealroom News, and SEC EDGAR.
Primary source: WSJ (via TechMeme/SEC EDGAR); supplemented by Grok Research digest citing WSJ, Dealroom News, and SEC EDGAR filing.
What This Means
OpenAI's self-funded $400M second venture vehicle marks a significant evolution from its first fund, where it relied on Microsoft and other external LPs. Funding the vehicle entirely from its own balance sheet gives OpenAI complete discretion over which startups it backs and removes the complexity of managing outside investors. The scale increase — from $175M to $400M — reflects OpenAI's dramatically stronger financial position. As AI giants increasingly use venture arms to lock in ecosystem influence, this fund positions OpenAI alongside Google Ventures and Microsoft M12 as a strategic investor actively shaping the next generation of AI companies, while tightening its grip on the startups it brings into its orbit.