Anthropic Files for IPO: $16.3B Revenue, an $80.7B Loss, and What the S-1 Says About Claude

Anthropic, the company behind Claude, filed to go public on October 26, 2026. The S-1 registration statement it lodged with the U.S. Securities and Exchange Commission is the first complete public look at the finances of a frontier AI lab — and the numbers are extreme in both directions. Revenue for the first half of 2026 was $16.3 billion, up from $1.2 billion a year earlier. The net loss for the same six months was $80.7 billion. Both figures are real, both are in the same document, and understanding why they coexist is the whole story.

The short version: Anthropic plans to list Class A shares on the Nasdaq Global Select Market under the ticker ANT, but the share count, price range and valuation are all blank in the filing. The $80.7 billion loss is dominated by a $72.4 billion non-cash accounting charge on convertible notes that grows as the company's valuation grows. Strip that out and the operating picture is a $693 million half-year loss — with a roughly $1.0 billion operating profit in the second quarter alone, the company's first profitable operating quarter. The filing also locks in hundreds of billions of dollars in future compute spending, and hands voting control to the founders permanently.

What Anthropic actually filed

Anthropic, PBC filed a Form S-1 with the SEC on October 26, 2026, and announced the filing the same day. The company applied to list its Class A common stock on the Nasdaq Global Select Market under the symbol ANT. Goldman Sachs and Morgan Stanley lead a syndicate of 22 banks on the offering. The filing is a preliminary prospectus: it is not yet effective, which means no shares can be sold and no offers to buy can be accepted until the SEC declares it effective.

What the filing does not contain is almost as notable as what it does. The number of shares to be offered, the price range, the amount Anthropic itself will raise, and the valuation are all left blank — the cover page literally reads "between $ and $" where the price range will go. The company had confidentially submitted a draft registration statement on June 1, 2026, so the public filing was expected; the blanks are standard for a first public S-1 and get filled in by amendment before the roadshow. Press reports put the timeline at a roadshow in the week of November 9 and a listing targeted for the week of November 16, but Anthropic itself has committed to nothing beyond "as soon as practicable" after effectiveness.

The revenue curve

The growth in the S-1 is the kind of curve that normally only exists in pitch decks. Anthropic's revenue was $41 million in 2023, $386 million in 2024, and $4.6 billion in 2025. In the first six months of 2026 it was $16.3 billion — more than triple the whole of 2025, and about fourteen times the $1.2 billion of the first half of 2025. The second quarter of 2026 alone brought in $11.6 billion, and the S-1 says revenue grew 1,368% year over year in that quarter.

Two things about that curve deserve attention. First, the growth is accelerating, not slowing: the second quarter was far larger than the first, and Anthropic separately told investors that third-quarter revenue reached $16.8 billion, according to press reports on the draft filing — a single quarter nearly matching the entire first half. That third-quarter figure is reported, not in the filed S-1, so treat it as reported rather than filed. Second, the growth is enterprise-led. As of September 30, 2026, Anthropic counted more than 11,900 customers paying at least $100,000 a year, up from more than 950 a year earlier. More than 1,900 customers pay over $1 million a year, and about 250 pay over $10 million. Net revenue retention — how much existing customers expand their spending — was approximately 900% as of September 30, 2026, which means the average customer is spending roughly nine times what it spent when it first signed up. No single customer accounted for more than 10% of revenue in the first nine months, though the top five together made up about 25%.

The $80.7 billion loss, explained

The headline loss looks catastrophic until you open the income statement. Of the $80.7 billion net loss in the first half of 2026, $72.4 billion is a non-cash charge: the change in the fair value of convertible notes, derivative liabilities and SAFEs. These are financing instruments Anthropic issued to raise money, and accounting rules require the company to revalue them as its own valuation rises. When the valuation climbs, the charge grows — the loss is, in a real sense, a side effect of the company becoming more valuable. The same charge was $34.3 billion for the whole of 2025 and $5.4 billion in 2024. It is not cash leaving the business, and it reverses on the offering when the instruments convert.

The operating picture, which excludes that charge, is far smaller and improving fast. Anthropic's operating loss for the first half of 2026 was $693 million, down from $2.1 billion in the same period of 2025. The full-year 2025 operating loss was $8.1 billion. And in the second quarter of 2026, the company generated operating income of about $1.0 billion — its first profitable operating quarter, as revenue growth outpaced expense growth. The S-1 is explicit that this is not a promise: it warns that Anthropic "may not achieve or sustain profitability in the future."

The loss bridge, in round numbers, is: a $693 million operating loss, plus the $72.4 billion fair-value charge, plus about $8.8 billion of other expense tied to note purchase agreements with Google and Amazon, minus about $1.1 billion of interest income, equals the $80.7 billion net loss. Cash is not the problem: the balance sheet shows $131.7 billion of cash, cash equivalents and short-term investments as of June 30, 2026.

What it costs to run Claude

The expense line that matters most for anyone who builds on Claude is compute and infrastructure. Anthropic spent $8.9 billion on compute and infrastructure in the first half of 2026 — more than the $7.3 billion it spent in all of 2025, and nearly four times the $2.3 billion of the first half of 2025. But the ratio is moving the right way: compute was about 55% of revenue in the first half of 2026, down from roughly double revenue a year earlier. The S-1 makes the same point in growth terms: revenue grew 1,368% in the second quarter while compute and infrastructure expenses grew 300%.

The bigger story is what Anthropic has already committed to spend. The S-1 discloses multi-year infrastructure agreements that are mostly non-cancelable and payable regardless of actual usage — if Anthropic spends less than the commitment, it pays the difference as a true-up. The named deals:

Those four named deals total more than $430 billion. On top of them, Anthropic has committed to buy additional TPU compute from providers including Google for delivery between 2028 and 2031, which it estimates will cost another $125 billion to $150 billion — a figure the S-1 explicitly excludes from its contractual commitments table. The filing also discloses compute agreements with SpaceXAI, the former X.AI, for NVIDIA GPU-powered compute. Add it up and the company's future compute bill runs well past half a trillion dollars, most of it payable whether or not the capacity gets used. That is the real leverage in this business: revenue can grow 14x in a year, but the compute bill is a fixed claim on the future.

There is a second dependency worth noting. About 48% of first-half 2026 revenue came through cloud marketplaces — AWS, Google Cloud and Azure — up from 11% in 2023. Those same hyperscalers are also Anthropic's suppliers and, the S-1 says, its primary competitors: it names Alphabet and OpenAI as the companies it competes with directly for customers, talent, compute and partnerships. Anthropic is, in effect, renting the storefront from its rivals.

Who controls Anthropic after the IPO

Public buyers of ANT shares will own a piece of Anthropic, but they will not run it. The S-1 sets out a governance structure with no economic stake attached to the control:

• Class F stock: a single share, issued to a Founder LLC made up of Dario Amodei, Daniela Amodei and the five other co-founders, carries 50.1% of the total voting power on matters submitted to shareholders generally, including the election of directors. It has no economic rights.
• Class T stock: held by the Long-Term Benefit Trust, it lets the trust elect and remove the Class T directors, who together will be a majority of the board. It has no economic rights and no vote on ordinary shareholder matters.
• Class A stock: what the public buys — one vote per share. Class A holders, the filing says, would effectively lack the ability to determine voting outcomes.
• Class E stock: issued to employees other than the co-founders, votes only on limited matters and has no economic rights.
• Class N stock: non-voting shares held mainly by strategic business partners, convertible to Class A on sale to an unaffiliated third party.

Anthropic is incorporated as a Delaware public benefit corporation, which legally requires it to balance shareholder returns with the interests of those affected by its conduct and its stated purpose: the responsible development of advanced AI for the long-term benefit of humanity. The trust is meant to keep that mission intact after the listing. The trade-off is stated in the filing itself: the structure could make directors harder to replace, and the company is a "controlled company" under Nasdaq's governance rules. The risk-factors section — about 90 pages of it — also discloses that the FTC issued a civil investigative demand to Anthropic in October 2026, after media reports in September that the agency had opened non-public investigations into the risks of increasingly autonomous AI systems.

The valuation question

Anthropic's last private round was in May 2026: $65 billion raised at a $965 billion valuation, according to CNBC. Press reports have put the IPO valuation above $2 trillion. Both numbers should be handled carefully: the $965 billion is a completed round, the $2 trillion is a report about backers' hopes, and the filed S-1 deliberately leaves the valuation blank. The run-rate revenue figure is blank too.

What the filing does prove is that the private market has already priced Anthropic like a company worth close to a trillion dollars, and that the public listing is the moment that price gets tested against audited numbers. If the market accepts the story — a company that turned its first operating profit in the second quarter while committing half a trillion dollars to future compute — the valuation reports may hold. If it focuses on the concentration, the non-cancelable commitments and the governance structure, they may not.

What it means for Claude users

For people who use Claude rather than invest in it, the S-1 changes little in the short term and quite a lot in the long term. Nothing in the filing changes Claude's prices: the API rates and subscription plans are untouched, and the filing is about the company's finances, not its products. But three disclosures matter for anyone building on Claude:

• Model continuity: reporting on the filing notes that Anthropic commits to at least 60 days' notice before retiring a publicly released Claude model on its own platforms, though models on Amazon Bedrock and Google-managed Claude follow their own schedules. Pin your model versions either way.
• Compute comes first: with more than $430 billion in named compute commitments and another $125–150 billion of TPU capacity on the way, Anthropic's first claim on its own cash is infrastructure, not price cuts. The price war with OpenAI that cut API rates through 2026 has a floor, and that floor is the compute bill.
• Claude is building Claude: the S-1 says that over 90% of the contributions to Anthropic's own codebase in September 2026 were written by Claude, and that the average daily volume of code contributed per engineer in the third quarter was over 45 times the 2024 average. The product is, increasingly, also the workforce.

FAQ

Can I buy Anthropic shares now?

No. The S-1 has been filed but is not yet effective, and the filing states plainly that the securities may not be sold and offers to buy may not be accepted until the SEC declares the registration effective. The share count and price range are not set yet.

Why is Anthropic's loss $80.7 billion if the business is growing?

Because $72.4 billion of the loss is a non-cash accounting charge on convertible notes and similar instruments, which grows as Anthropic's valuation grows. The operating loss — the cost of actually running the business — was $693 million for the half, and the second quarter alone produced about $1.0 billion of operating profit.

Does the IPO change Claude's pricing?

Not directly. The filing sets no product prices and changes no API rates or subscription plans. Indirectly, the scale of the compute commitments — more than $430 billion in named deals — sets a floor under how far prices can fall.

Who will control Anthropic after the IPO?

The seven co-founders, through a single Class F share carrying 50.1% of the voting power, and the Long-Term Benefit Trust, which elects a majority of the board. Public Class A shareholders get one vote per share but, in the filing's own words, would effectively lack the ability to determine voting outcomes.

When will Anthropic list?

No date is set in the filing. Press reports point to a roadshow in the week of November 9 and a listing in the week of November 16, 2026, but the filing only says the sale will begin as soon as practicable after the registration becomes effective.

Key takeaways

• Anthropic filed its S-1 on October 26, 2026, to list Class A shares on Nasdaq as ANT; the share count, price range and valuation are blank.
• First-half 2026 revenue was $16.3 billion, up about 1,300% year over year, with the second quarter alone at $11.6 billion.
• The $80.7 billion net loss is mostly a $72.4 billion non-cash charge on convertible instruments; the operating loss was $693 million, and Q2 produced about $1.0 billion of operating profit.
• Named compute commitments total more than $430 billion — Google ~$114.5 billion, AWS $110 billion, Microsoft $44.9 billion, Broadcom leases ~$161.2 billion — plus an estimated $125–150 billion more TPU capacity.
• Public shareholders will not control the company: the founders' single Class F share carries 50.1% of the vote and the Long-Term Benefit Trust elects a majority of the board.

Anthropic goes public with a revenue line that grew fourteenfold in a year and financial statements unlike any other major IPO filing in recent years — a company that made $16.3 billion in six months, lost $80.7 billion on paper, turned its first operating profit in the same quarter, and has already promised more than half a trillion dollars to its compute suppliers. Whether the market buys that story will be decided when the price range finally appears, expected in November.