OpenAI Confidentially Files for IPO, Targeting $1 Trillion Valuation

OpenAI has confidentially filed its S‑1 prospectus with the Securities and Exchange Commission, the company confirmed on June 9, setting the stage for what could be one of the largest public market debuts in history. The move comes a week after rival Anthropic filed its own confidential paperwork and days before Elon Musk's SpaceX is set to begin trading on Nasdaq.

The company's statement was characteristically blunt: "We expect it to leak so we're just announcing it,",¹ according to CNBC. "We have not decided on timing yet; it may be a while because there are things we want to do that are likely easier as a private company. But it's a complicated set of tradeoffs and this gives us the option to go public sooner if that ends up being best."

OpenAI is targeting a public listing as early as the fourth quarter of 2026, with September floated as a potential window, according to The Wall Street Journal. The company has enlisted Goldman Sachs and Morgan Stanley as lead underwriters — the same duo topping SpaceX's filing, CNBC previously reported.

The company's last private valuation closed at $852 billion in a March 2026 funding round that drew Amazon, Nvidia, SoftBank, and others, according to Investing.com. IPO reports have targeted up to $1 trillion, with a raise of $60 billion or more, Reuters reported.

CFO Sarah Friar told CNBC in April that IPO readiness was "good hygiene" for a company of OpenAI's scale, but declined to commit to a specific timeline. OpenAI also plans to facilitate a tender offer that lets employees sell shares at the $852 billion valuation, easing near‑term liquidity pressure, CNBC noted.

The numbers behind the filing are staggering — and sobering. OpenAI's annualized revenue run rate hit roughly $20 billion by the end of 2025, CFO Sarah Friar disclosed in a January 2026 blog post. But actual 2025 revenue landed closer to $13.1 billion, and the company loses approximately $1.22 for every dollar of revenue, Barron's reported.

The burn rate is only getting steeper. Financial documents obtained by The Wall Street Journal show OpenAI expects to lose roughly $74 billion in 2028 alone before turning profitable in 2030 — a trajectory that depends on massive revenue growth to outrun ballooning compute costs. The company has signed up to $1.4 trillion in data center commitments over eight years, CEO Sam Altman confirmed in November 2025.

For comparison, Barron's notes Anthropic is expected to post a small operating profit for Q2 2026 after doubling revenue quarter‑over‑quarter to a $47 billion annualized run rate — a much faster path toward sustainability. SpaceX, with its Starlink‑driven revenue loop, is the outlier: it reported $18.67 billion in 2025 revenue with $6.58 billion in adjusted EBITDA, per its May 2026 S‑1 filing.

OpenAI is the third domino in what's shaping up as AI's IPO moment. Together, OpenAI, Anthropic, and SpaceX could create nearly $4 trillion in combined market value and absorb close to $300 billion in new capital from public markets, Barron's calculated.

SpaceX goes first: its Nasdaq debut is set for June 12 under the ticker SPCX, targeting a $1.75 trillion to $2 trillion valuation with up to $75 billion raised. Anthropic filed confidentially on June 1. The sequencing matters — investor appetite for the first will set the tone for the second and third.

Not everyone is convinced the pricing holds up. "These are great companies. A great company doesn't automatically mean it's a great investment," said Jay Ritter, director of the IPO Initiative at the University of Florida, speaking to Marketplace. Ritter pointed to Apple's 1980 IPO, which jumped 30% on day one and then underperformed for two decades before its historic run.

Going public changes how a company makes decisions. For the developers and builders who depend on OpenAI's APIs, a few shifts are worth watching.

Pricing transparency. Public companies report revenue by segment. Builders will finally get a real look at how much of OpenAI's revenue comes from API usage versus ChatGPT subscriptions — data that matters when you're betting your product on their platform.

Product velocity vs. profitability pressure. OpenAI loses $1.22 per dollar of revenue. Public markets may tolerate that for a few quarters, but not forever. The pressure to raise prices or introduce enterprise‑tier pricing — already playing out across the industry — intensifies once quarterly earnings calls start.

Competitive dynamics. OpenAI's filing comes at what Fortune called a "precarious moment" — it's losing ChatGPT's early leads with consumers and businesses to Google and Anthropic, according to Emarketer analyst Nate Elliott. More competition usually means better pricing and faster innovation for builders.

Platform risk. When your core infrastructure provider becomes a public company, its priorities can shift. The S‑1, when published, will be the first clear window into OpenAI's actual unit economics — and whether the API business is subsidized by or subsidizing the consumer product.

Several unknowns could reshape the timeline or outcome.

Legal overhang. A May 18 jury verdict dismissed all claims in Elon Musk's lawsuit against OpenAI, but Musk has announced plans to appeal. The appeal remains a process risk — though absent a new court order, the ruling "reduces the immediate legal overhang over the IPO," Investing.com noted.

Market conditions. All three IPOs land amid inflation concerns and higher Treasury yields. Three‑month T‑bills yield roughly 2.7 percentage points more than S&P 500 dividends, Barron's reported — making risk‑free assets unusually attractive compared to money‑losing AI startups.

Nonprofit governance. OpenAI's structure is still unusual. The OpenAI Foundation, a nonprofit, holds a 26% stake in OpenAI Group with warrants for additional shares tied to milestones. How that governance interacts with public‑shareholder fiduciary duties is untested, Reuters explained.

The S‑1, once made public, will answer many of these questions — and probably raise new ones. Until then, the filing itself is the signal: the largest AI lab is preparing to open its books to the world.