In the span of eleven days, the two companies that defined the generative-AI era both quietly told Wall Street they want to go public.
Anthropic confidentially filed a draft Form S-1 with the Securities and Exchange Commission on June 1, 2026, just days after closing a $65 billion Series H that valued the Claude maker at $965 billion post-money. One week later, on June 8, OpenAI submitted its own confidential draft registration statement, the legal first step toward a listing the company is reportedly targeting for the fourth quarter of this year. Sandwiched between them, on June 12, SpaceX completed the largest IPO in history — raising roughly $75 billion and surging to a market capitalization around $2.1 trillion within days of its debut.
Taken together, the three offerings could put more than $3.5 trillion of market value into public hands, and they mark the moment the long-promised "AI IPO supercycle" stopped being a forecast and became a calendar.
"The SpaceX IPO this week will definitely be a leading indicator to how Anthropic or OpenAI will go out," one analyst told CNBC ahead of the Musk-led debut. "I think it's important for the AI industry that these IPOs go well, and I actually think they will go well, because they're doing well."
The numbers behind the filings
The financial profiles of the two AI labs are both staggering and, in OpenAI's case, sobering.
Anthropic's S-1 lands on the back of breakneck growth: the company's run-rate revenue crossed roughly $47 billion in May, up from around $9 billion to $10 billion a year earlier — a roughly five-fold jump in a matter of months. Its Series H, announced May 28, was led by Altimeter Capital, Dragoneer, Greenoaks and Sequoia Capital, and the prospectus is reported to target a Nasdaq listing as soon as October, with an offering that bankers expect could raise more than $60 billion.
OpenAI's picture is larger on top line but heavier on losses. The company, most recently valued at about $852 billion in a March financing, is on track for roughly $30 billion in revenue this year. But it is also guiding to a loss of around $14 billion for 2026, and the company has signaled it does not expect to generate positive cash flow until the end of the decade — a reflection of the enormous compute and data-center commitments underpinning its product roadmap. OpenAI has stressed it has "not decided on timing," noting in its own disclosure that some of what it wants to build may be easier to pursue as a private company; the reported Q4 target is aspirational, not fixed.
Both labs are leaning on the same trio of underwriters — Goldman Sachs, Morgan Stanley and JPMorgan Chase — the banks now orchestrating the biggest technology listings ever attempted.
A first in the public record
The clearest signal that AI's frontier labs are now treated as blue-chip public companies came not from either of them, but from SpaceX. Its own S-1 named Google, OpenAI and Anthropic as key AI competitors — the first time all three have appeared together in a public regulatory filing, a quiet acknowledgment that the contest for AI supremacy now runs through companies that public investors will soon be able to own directly.
SpaceX's reception offered an early read on appetite. The rocket maker priced 555 million-plus shares at $135 apiece, then climbed roughly 19% on its first session and kept rising, briefly pushing its valuation past $2.6 trillion and ahead of Amazon's. Alphabet, which holds close to 5% of SpaceX, saw that stake balloon to roughly $105 billion on paper — a reminder of how entangled the AI cohort's fortunes have become.
Why It Matters
For most of the AI boom, the gains accrued to a closed circle of venture funds, sovereign wealth vehicles and a handful of strategic backers. These filings begin to pry that circle open. Goldman Sachs analysts have projected 2026 IPO proceeds could approach $160 billion, roughly quadrupling 2025's total — a windfall driven almost entirely by AI and adjacent infrastructure names.
But scale cuts both ways. Bank of America characterized the cycle bluntly as a large-scale transfer of accumulated risk from early investors to the public market. OpenAI's projected $14 billion loss and its decade-long path to cash flow positivity will now be stress-tested by quarterly earnings calls rather than friendly private rounds. And the sheer size of these offerings raises the prospect that investors rotate capital out of already-listed tech names to buy in — a liquidity question even the lead banks concede is worth watching, though they argue ample 2026 market liquidity makes it manageable.
There is also a concentration risk hiding in plain sight: SpaceX, OpenAI and Anthropic are increasingly cross-referenced as competitors, partners and shareholders of one another. A stumble at one frontier lab could ripple across the entire newly public cohort.
What to Watch
- Whether OpenAI's Q4 target holds. A confidential S-1 is an option, not a commitment. Watch for a public flip of the prospectus and a price range, which would convert reported timing into a real roadshow. - Anthropic's October window. With underwriters reportedly eyeing a $60 billion-plus raise, any move on share count, ticker or exchange would confirm the offering is live. - The profitability narrative. OpenAI's losses and SpaceX's post-debut volatility will shape how aggressively investors price Anthropic's growth versus its burn. - Capital rotation. If mega-listings pull money out of incumbent tech, expect pressure on the very Magnificent Seven names that bankrolled the AI build-out.
The supercycle, in other words, has arrived. Whether it crests or breaks will be decided not in private term sheets but on the open market — and soon.
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Sources: [CNBC — OpenAI confidentially files for IPO](https://www.cnbc.com/2026/06/08/openai-confidentially-files-for-ipo-prepping-wall-street-for-ai-debut.html); [CNBC — Anthropic IPO S-1 prospectus](https://www.cnbc.com/2026/06/01/anthropic-ipo-s1-prospectus.html); [CNBC — SpaceX IPO takeaways](https://www.cnbc.com/2026/06/12/spacex-ipo-spcx-live-updates.html); [NPR — SpaceX record-breaking $75 billion IPO](https://www.npr.org/2026/06/11/nx-s1-5853199/spacex-ipo-price-elon-musk).
"It's important for the AI industry that these IPOs go well, and I actually think they will go well, because they're doing well."- Market analyst, Quoted by CNBC