OpenAI submitted a confidential S-1 registration statement to the U.S. Securities and Exchange Commission on Monday, confirming what has been rumored for months: the company that launched the generative AI boom intends to go public. The filing arrived exactly one week after Anthropic filed its own confidential S-1 on June 1, and three days before SpaceX begins trading on the Nasdaq on June 12.

Three companies collectively valued above $2.5 trillion are now preparing to hit public markets within months of each other. The question is no longer whether the AI industry will face Wall Street scrutiny, but whether Wall Street has enough capital to absorb it.

The Filing

OpenAI’s announcement was characteristically blunt. “We expect it to leak so we’re just announcing it,” the company wrote in a blog post, according to The Verge. “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.”

That hedge is significant. A confidential S-1 begins the SEC review process but commits the company to nothing. Confidential filings typically precede an IPO by six to nine months, though the timeline can stretch longer. OpenAI’s language suggests the company views the filing as optionality rather than a starting gun.

Sam Altman reinforced that framing on CNBC, saying the filing “gives us the option to go public sooner if that ends up being best.” He pushed back on the narrative that OpenAI and Anthropic are racing each other to market. “I think there is a race to deliver the best technology and build the best business,” Altman told CNBC. “But, you know, going public is a financing event, and I don’t think that’s one that we’re focused on the timing of.”

The Scoreboard

The raw numbers tell a different story than Altman’s measured tone. As of their most recent private rounds:

  • Anthropic: $965 billion post-money valuation (May 2026 Series H, $65 billion raised), according to Reuters and Morningstar
  • OpenAI: $852 billion post-money valuation (March 2026 round)
  • SpaceX: $1.77 trillion estimated IPO valuation, with first trading on June 12 at $135 per share, according to Forbes

Anthropic has overtaken OpenAI as the world’s most valuable private company. Both are expected to cross $1 trillion at IPO pricing. Facebook’s 2012 IPO valued the company at roughly $104 billion. These listings would be ten times that.

SpaceX adds a layer of complexity. Elon Musk’s company now owns xAI (his AI lab) and has signed massive compute deals with both Google ($920 million per month) and Anthropic ($1.25 billion per month for data center access), creating financial entanglements that will be laid bare in SEC filings.

The Cracks in OpenAI’s Position

For all the headline numbers, OpenAI’s IPO carries more uncertainty than Anthropic’s. Three fault lines have emerged.

Missed targets. The Wall Street Journal reported that OpenAI missed internal revenue targets and user growth numbers heading into the filing. The specifics remain confidential, but the report surfaced internal disagreements about whether the company’s trajectory justifies the pace of its IPO preparations.

The CFO problem. CFO Sarah Friar has reportedly expressed doubts that OpenAI is ready to go public this year, according to The Guardian. She has raised concerns about whether the company can cover its computing costs. When a CFO is publicly reported to be skeptical of the IPO timeline, investors pay attention.

The margin question. The Information reported that OpenAI generated $5.7 billion in Q1 2026 revenue, but with adjusted negative margins of -122%, as cited by The Guardian. That means OpenAI lost $1.22 for every dollar it brought in. These figures are unconfirmed (OpenAI does not release financials), but they illustrate the core economics: compute is expensive, and it is not getting cheaper at scale.

OpenAI initially pledged $1.4 trillion in compute infrastructure spending, a number Altman later walked back to $600 billion by 2030, according to The Verge. Even the reduced figure would require massive capital infusions that public markets could provide, but only if investors believe the revenue will eventually follow.

The Anthropic Contrast

Anthropic’s filing, by comparison, arrived with less visible turbulence. The company completed a $65 billion Series H round at $965 billion just days before submitting its S-1, Reuters reported. That round included backing from Google, Salesforce, and existing investors, providing a fresh valuation anchor for IPO pricing.

Anthropic has also locked in compute infrastructure through its $15 billion annual deal with SpaceX for data center access, reducing the uncertainty around its infrastructure costs. OpenAI, meanwhile, is still navigating its Stargate commitments after shelving the UK portion in April.

The dynamic is notable: eighteen months ago, Anthropic was the underdog. Claude was a niche product. OpenAI was the undisputed market leader. The valuation inversion reflects both Anthropic’s rapid enterprise adoption (particularly Claude Code and Managed Agents) and questions about OpenAI’s path to profitability.

The Capital Absorption Question

The sheer scale of these simultaneous listings has raised questions about whether capital markets can handle the load. Goldman Sachs CEO David Solomon told CNBC that markets have “sufficient capital appetite” for SpaceX, Anthropic, and OpenAI IPOs simultaneously, describing investor sentiment as “more greed than fear.”

Not everyone agrees. Adrian Cox, a thematic strategist at the Deutsche Bank Research Institute, told The Guardian that “some might say that there is only a finite amount of financing to go around.” He noted that there “may be a downside to waiting under those circumstances,” implying that OpenAI’s hedging could cost it if Anthropic and SpaceX absorb the available capital first.

Russ Mould, investment director at AJ Bell, was more direct: “You’ve got a market with enormous potential with a lot of very, very big players jockeying for position. We don’t know who’s going to win. They can’t all be valued as winners in the long run.”

The S&P 500 and Nasdaq are already considering rule changes to include newly floated companies faster, which could expose ordinary index fund investors to these companies’ fortunes almost immediately after listing.

The Government Variable

One additional complication hangs over OpenAI’s IPO: the Trump administration is in active discussions about taking a government equity stake in the company, as Business Insider and other outlets have reported. The structure and size of any government stake would need to be resolved before an S-1 becomes public, as it would materially affect share structure, governance, and investor expectations.

This is unprecedented territory. No major tech company has gone public with a U.S. government equity position. The closest parallel might be the government’s stakes in automakers during the 2008 financial crisis, which created complex governance dynamics and depressed stock performance until the government exited.

What Gets Revealed

A confidential S-1 stays confidential only until 15 days before the IPO roadshow begins. At that point, the full filing becomes public, and for the first time, investors will see OpenAI’s actual revenue, costs, executive compensation, risk factors, and governance structure in regulatory detail.

For an industry that has operated on projections, benchmarks, and private valuations, that transparency will be clarifying. Investors will learn whether the -122% margin figure is accurate. They will see what revenue growth actually looks like quarter over quarter. They will understand the full scope of compute commitments and how OpenAI plans to fund them.

As Cox told The Guardian: “The demands of a public company are very different from a private company and the transparency that is required in going public has caused not only a change in strategy, but also a change in tone around the company.”

The Clock

Altman says OpenAI’s IPO “may be a while.” The filing suggests otherwise. Confidential S-1s are not academic exercises. Companies file them because they intend to go public within a reasonable window. The SEC review process alone takes months.

If SpaceX trades successfully starting June 12 and Anthropic prices its offering in Q3 or Q4, OpenAI faces a narrowing window. Waiting too long risks going public after the market has allocated its AI capital budget to competitors. Going too soon risks exposing financials that do not yet support the valuation.

For builders, developers, and the agent ecosystem, the IPO wave introduces a new variable: quarterly earnings pressure. Public companies answer to shareholders every 90 days. The research investments, the alignment work, the open-source contributions, the API pricing decisions that have shaped the AI landscape so far were all made by private companies spending private capital on their own timelines. That ends when the ticker symbols go live.