OpenAI confidentially filed its S-1 IPO prospectus with the U.S. Securities and Exchange Commission on Friday, May 22, 2026, setting the stage for one of the largest technology listings in market history. Goldman Sachs and Morgan Stanley are leading the offering, with a public debut targeted for the fourth quarter of 2026 at a valuation range between $852 billion and more than $1 trillion.
The filing comes days before rival Anthropic disclosed a $65 billion Series H round that pushed its own valuation to $965 billion, intensifying a race between the two frontier AI labs to anchor the next wave of public market enthusiasm around artificial intelligence.
Key Highlights
- OpenAI submitted a confidential draft registration statement to the SEC on May 22, 2026
- Target valuation sits between $852 billion and over $1 trillion, eclipsing every prior tech IPO
- Goldman Sachs and Morgan Stanley are lead underwriters; JPMorgan is reportedly involved in early discussions
- Public listing window: as early as September 2026, with Q4 2026 as the most likely target
- Run-rate revenue reached $25 billion in February 2026, up from $20 billion at the end of 2025
- CEO Sam Altman has publicly targeted $100 billion in annualized revenue by 2027
Filing Details
A confidential filing is not a public commitment to list. It allows OpenAI to begin SEC review of its draft prospectus while keeping financial details out of public view, typically two to three months before a formal S-1 becomes public. OpenAI declined to confirm the filing on the record but issued a measured statement: "As part of normal governance, we regularly evaluate a range of strategic options. Our focus remains on execution."
The structure of the offering is expected to reflect OpenAI's recent reorganization into a public benefit corporation, with the nonprofit OpenAI Foundation retaining significant governance rights. That structure was finalized last year following extended negotiations with the California and Delaware attorneys general.
Financials and the Path to Profitability
The financial backdrop is striking. OpenAI's annualized run-rate climbed from $20 billion at the close of 2025 to $25 billion by February 2026, driven primarily by ChatGPT subscriptions, enterprise deployments, and API consumption. Sam Altman has repeatedly told investors the company is on track for $100 billion in annual revenue by 2027.
The losses, however, remain extraordinary. According to filings reviewed by analysts, OpenAI lost roughly $1.22 for every $1 in revenue during the first quarter of 2026 — a function of massive compute commitments, frontier model training costs, and an aggressive data center buildout with Microsoft, Oracle, and CoreWeave partners.
Impact
The implications extend well beyond OpenAI. A successful IPO at the upper end of the valuation range would create the most valuable technology debut in history, larger than Saudi Aramco's 2019 offering on an enterprise basis. It would also crystallize the AI capital cycle, providing a public market benchmark for Anthropic, xAI, and a growing list of agentic AI startups eyeing similar exits.
For enterprise customers and developers building on OpenAI's platforms, the listing creates new dynamics. Public market scrutiny is expected to push the company toward stricter unit economics, potentially affecting pricing on the API, ChatGPT Enterprise, and the new agentic product tier. Public quarterly disclosures will, for the first time, reveal the true cost structure of running a frontier AI lab at scale.
Background
OpenAI was founded in 2015 as a nonprofit research organization. Its capped-profit subsidiary, created in 2019, raised more than $13 billion from Microsoft alone before the broader investor base expanded. The company's restructuring into a public benefit corporation in 2025 cleared the legal foundation for a public listing.
Elon Musk, an early OpenAI co-founder, has filed multiple lawsuits seeking to block aspects of the for-profit transition. OpenAI defeated a preliminary challenge earlier this month, though Musk has vowed to appeal. The litigation overhang is one of several risk factors the prospectus will need to disclose.
SpaceX, also represented by Goldman Sachs and Morgan Stanley, filed its own confidential IPO documents on April 1, 2026. Both companies are now competing for the same banking resources and the same pool of late-cycle institutional capital.
What's Next
OpenAI's public S-1 is expected to surface between Labor Day and Thanksgiving 2026, with the actual listing following two to three weeks later. Roadshow scheduling, final pricing, and the choice of exchange — NYSE or Nasdaq — have not yet been disclosed.
For the AI industry, the next six months will determine whether public markets are ready to absorb a frontier AI listing of this scale. The answer will shape funding rounds, M and A activity, and the strategic positioning of every AI infrastructure provider in the ecosystem.
Source: Axios