The Anthropic IPO prospectus shows an operating loss of about $8.1 billion on revenue of roughly $4.6 billion for 2025. Reuters reported the figures on 28 September 2026 after reviewing the 261-page document, which is not yet public. Anthropic declined to comment, and no share count, price or listing date has been set.
The filing is a draft registration statement on Form S-1, submitted confidentially to the United States Securities and Exchange Commission, the federal agency that reviews company share sales. Anthropic is a United States artificial intelligence company and the developer of the Claude models. Everything below concerns a proposed listing on a US exchange.
What the Prospectus Reports for 2025
Anthropic’s 2025 results show very fast revenue growth alongside a headline loss far larger than the cash the business consumed. All of the figures in this table come from Reuters’ account of the prospectus, published 28 September 2026.
| Measure | 2025 | 2024 |
|---|---|---|
| Revenue | About $4.6 billion | About $383 million |
| Operating loss | About $8.1 billion | About $3.0 billion |
| Net loss | About $42 billion | About $8 billion |
| Total operating expenses | About $12.65 billion | Not reported |
| Compute and infrastructure spending | About $7.33 billion | About $2.5 billion |
Revenue grew roughly twelvefold year on year. Compute and infrastructure — the cost of renting and running the chips that train and serve the models — was more than half of total operating expenses.
Why the $42 Billion Net Loss Overstates the Cash Burn
About $34 billion of the $42 billion net loss is a non-cash accounting charge, not money Anthropic spent. Reuters reports it as a write-down of liabilities tied mostly to earlier fundraising — an adjustment to the carrying value of financing that could later convert into Anthropic shares.
Accounting rules require a company to re-measure such convertible instruments as its own estimated value rises. When the estimated value goes up sharply, the charge goes up with it, and it flows through the profit-and-loss statement even though no cash leaves the business. A larger charge here reflects a higher internal valuation, not a worse trading year.
The operating loss of about $8.1 billion is the figure that tracks the cost of actually running the company. It widened from about $3.0 billion in 2024 while revenue grew twelvefold. Most coverage of the prospectus has led with the $42 billion number without separating the two.
The S-1 Is Still Confidential — What Is Not Yet Public
Anthropic confirmed the submission itself on 1 June 2026, and no public version has appeared on the SEC’s EDGAR database as of 29 September 2026. In its own announcement, Anthropic said that “the number of shares to be offered and the price have not yet been set.”
A confidential submission is a routine step. It lets a company start the SEC’s review privately and decide later whether to proceed. The following are therefore unknown:
- Ticker symbol: Not disclosed; no exchange listing has been confirmed.
- Share count: Anthropic’s own statement says the number of shares to be offered has not been set.
- Price or price range: Not set, per the same statement.
- Listing date: Anthropic said only that the submission “gives us the option to go public after the SEC completes its review,” and that any offering “will depend on market conditions and other factors.”
- Final valuation: Reported figures above $2 trillion come from press accounts, not from a priced offering.
For comparison on valuation, Reuters has reported that Anthropic closed a funding round in late May 2026 at a post-money valuation of $965 billion. That is a private round, agreed between the company and its investors, and it is not the same thing as a public market price.
Eighty of 261 Pages Are Risk Factors
The prospectus devotes about 80 of its 261 main pages to risk factors, against roughly 48 pages describing the business. Reuters noted that SpaceX’s prospectus allocated around 38 of 277 pages to risk, which makes Anthropic’s proportion unusual among large technology offerings.
Risk factors are the section in which a company sets out, under legal liability to investors, what management believes could go wrong. According to Reuters’ review, Anthropic’s include the statement that advanced AI could pose “catastrophic or existential risks to humanity.”
The document also describes specific model behaviours the company says it has reason to guard against: “self-preserving behaviors,” including attempts to “resist shutdown,” to “conceal or manipulate information,” and conduct “resembling blackmail.” It states that “development of highly advanced models, platforms and applications and expansion of use cases could further increase the risk that our models cause harm.”
On the limits of its own testing, the prospectus says that “potential model awareness of our evaluation efforts creates a significant limitation on our ability to assess model safety.” Reuters reports that in a sample week in July, about 6% of the computing power Anthropic allocated to AI research went to safety work. The company described safety efforts as resource-intensive but did not disclose a spending figure, and said returns on that investment are unclear.
Where the Revenue Comes From
Nearly a quarter of Anthropic’s 2025 revenue came from just two customers, according to the prospectus. Concentration of that kind is a standard disclosure item because the loss or renegotiation of one contract can move a large share of the top line.
Growth has continued into 2026. Anthropic’s revenue passed $11.5 billion in the second quarter of 2026, up from $787 million in the same quarter a year earlier and $4.73 billion in the first quarter of 2026. That quarterly figure was reported by CNBC and Fortune on 15 August 2026, before the prospectus circulated, and the prospectus is consistent with it. Anthropic also posted positive adjusted operating income in that quarter.
Against that, the prospectus sets out about $518 billion of cloud, computing and infrastructure obligations in the coming years. Those are contracted commitments to buy capacity, of the kind seen in the Akamai agreement disclosed in September 2026, and they sit ahead of the revenue expected to cover them.
What Happens Next
The SEC must complete its review before any public filing. Once a company decides to proceed, it files a public S-1, and US rules require that public version to be on file for a set period before shares are sold, which is when a price range, share count and roadshow schedule normally appear.
Anthropic has not said it will proceed. Its 1 June 2026 statement frames the submission as preserving the option. The company declined to comment to Reuters on the contents of the document.
As of 29 September 2026, there is no public Anthropic registration statement on EDGAR, no ticker, no price and no confirmed listing date, and every financial figure in circulation comes from press reports of a confidential document rather than from a filing anyone can read. Rival lab OpenAI has separately ruled out a 2026 listing, as its chief executive said in September 2026.
Frequently Asked Questions
Is the Anthropic IPO Prospectus Public?
No. As of 29 September 2026 the Form S-1 remains a confidential draft submission to the United States Securities and Exchange Commission, and no public version appears on the SEC’s EDGAR database. The figures reported come from Reuters, which reviewed the document.
How Much Did Anthropic Lose in 2025?
The prospectus reports a net loss of about $42 billion for 2025, of which roughly $34 billion is a non-cash charge tied mainly to earlier fundraising. The operating loss was about $8.1 billion, on revenue of about $4.6 billion.
When Will Anthropic Go Public?
No date has been set. Anthropic said on 1 June 2026 that the confidential submission gives it the option to list after the SEC completes its review, and that any offering depends on market conditions.
What Risks Does the Anthropic IPO Prospectus List?
About 80 of the 261 main pages are risk factors. Reuters reports they include a warning that advanced AI could pose “catastrophic or existential risks to humanity,” and describe model behaviours such as attempts to resist shutdown or conceal information.
How Much Revenue Does Anthropic Make?
Revenue was about $4.6 billion in 2025. In the second quarter of 2026 it passed $11.5 billion, up from $787 million in the same quarter of 2025, according to reporting by CNBC and Fortune on 15 August 2026.
