OpenAI Reportedly Preparing for September IPO OpenAI is accelerating plans to tap public markets, even as questions mount over whether the AI investment boom can support a trillion‑dollar debut.

Legal win clears the runway

In mid-May 2026, a jury in Oakland, California, rejected Elon Musk’s claims against OpenAI over its shift to a for‑profit structure, finding his lawsuit was barred by statutes of limitations. The decision removed a cloud over the company’s governance and finances just as it weighed strategic options.

Within days, reports emerged that OpenAI was “ready to move forward with its initial public offering,” with CEO Sam Altman hoping the company would be ready by September. The ChatGPT maker was said to be working with Goldman Sachs and Morgan Stanley and could file IPO paperwork “within days or weeks.”

Confidential filing and Wall Street timeline

By May 20, Axios reported that OpenAI was working on a confidential IPO prospectus that “could be filed shortly, although timing remains fluid,” noting that such filings usually precede public S‑1 documents by a couple of months and an actual offering about a month later. An OpenAI spokesperson framed it as routine planning: “As part of normal governance, we regularly evaluate a range of strategic options. Our focus remains on execution.”

Business Insider, citing a person familiar with the matter, said OpenAI was “moving quickly toward an initial public offering and targeting September for the listing,” again naming Goldman Sachs and Morgan Stanley as advisers. The report added that a March funding round valued OpenAI at $852 billion and that the IPO would give stakeholders liquidity while exposing “multi‑billion‑dollar losses through 2029,” including a projected $85 billion loss in 2028.

A trillion‑dollar test of the AI boom

By late May, AI Magazine described OpenAI’s float as potentially “one of the largest IPOs in history,” with an estimated valuation of up to $1 trillion and a September 2026 listing in mind. It noted OpenAI has already raised $186 billion and that ChatGPT claims 54% of generative‑AI traffic, versus 3% for rival Grok, positioning the company as a bellwether for investor appetite amid warnings from Bank of America about a looming AI bubble.

On the ground, OpenAI is also courting the startup ecosystem. President Greg Brockman highlighted an offer of “$2M in API credits in every @ycombinator startup in the current batch,” pitching it as “compute for powering the next generation of startups.” A follow‑on promotion extended similar $2 million token packages to YC’s spring and summer batches.

Against a backdrop of imminent IPOs from Musk’s SpaceX and rival Anthropic, OpenAI’s listing now looks set to become the defining market test of whether today’s AI valuations are justified or speculative excess.

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