What Anthropic's S-1 Shows, and What Is Only Reported

Anthropic's S-1, filed on 26 October 2026, DOCUMENTS a ticker (ANT), an exchange (Nasdaq Global Select Market) and 22 named underwriters, and leaves the share count, price range and offering size blank.⁠¹ The raise of up to $100 billion in headlines is REPORTED, with no source named in the coverage I opened, and the net loss of $80.7 billion behind the not-profitable label is mostly a $72.4 billion fair-value charge tied to the company's own valuation.⁠¹⁠²

26 October: a filing with the key numbers blank

DOCUMENTED. The cover page says Anthropic, PBC has applied to list Class A common stock on the Nasdaq Global Select Market under ANT. It says both the company and selling stockholders will sell shares, and it leaves the share count and price range empty. Goldman Sachs and Morgan Stanley head a list of 22 banks.⁠¹ Anthropic's own announcement the same day says the terms are undetermined and that nothing can be sold until the registration becomes effective.⁠³

The cover labels the document a preliminary prospectus that is incomplete and may change.⁠¹

June 30: $16.3 billion in revenue and a $0.7 billion operating loss

DOCUMENTED, in the summary tables. Revenue was $16,286 million in the six months to 30 June 2026, against $1,163 million a year earlier and $4,585 million for all of 2025.⁠¹ That is a 14-fold rise on the first half of 2025, by GetCoreTech's arithmetic. Operating expenses were $16,979 million, so the operating loss was $693 million, or 4% of revenue.⁠¹

Compute and infrastructure cost $8,945 million, 55% of revenue (8,945 ÷ 16,286). A year earlier it cost $2,334 million, about 200% of that period's revenue.⁠¹ The S-1 says Anthropic buys compute across AWS Trainium, Google TPUs, NVIDIA GPUs and AMD GPUs.⁠¹ How those providers' own spending plans were received is scored in our AI capex scorecard. AWS is Anthropic's primary cloud and training partner, per the Series H announcement.⁠⁴ The cash Amazon spends to build that capacity is the subject of Amazon's AWS growth and cash-flow pressures.

The net loss was $80,748 million.

Reported Of that, $72,388 million is a change in the fair value of convertible notes, derivative liabilities and SAFEs, which the filing attributes mainly to a rise in the company's enterprise valuation.⁠¹ A further $8,757 million sits on an other-income-and-expense line that the summary table does not explain.⁠¹ AP's coverage calls the $72.4 billion a one-time charge.⁠² The same fair-value line was $1.0 billion in 2023, $5.4 billion in 2024 and $34.3 billion in 2025.⁠¹

The $100 billion figure is a report, not an entry in the filing

REPORTED. The AP account, carried by Yahoo Finance on 27 October, says reports suggest the offering could raise up to $100 billion and that the public valuation could land between $1.5 trillion and $2 trillion. It names no source for either figure, and it says no price has been set.⁠² Neither number appears in the S-1.⁠¹

DOCUMENTED. The offering has two parts. Anthropic sells shares, and so do selling stockholders, and Anthropic receives nothing from the stockholders' shares.⁠¹ Any headline total therefore mixes new capital for the company with cash for existing holders, and the split is blank.⁠¹ The filing says Anthropic's proceeds go to general corporate purposes including compute, tax withholding on employee share settlements, and possibly acquisitions, none of which is agreed.⁠¹ As of 30 June 2026 it reported $131.7 billion in cash and short-term investments and $141.1 billion raised in total.⁠¹

Reported The last private price in the record is the Series H. Anthropic announced on 28 May 2026 that it raised $65 billion at a $965 billion post-money valuation, including $15 billion of previously committed hyperscaler investment, $5 billion of it from Amazon.⁠⁴ A reported $1.5-2 trillion range would be 1.6 to 2.1 times that figure, by GetCoreTech's arithmetic. Amazon also holds convertible notes that the S-1 says convert into Class N shares at the offering, and AWS remains Anthropic's primary cloud and training partner, per the Series H announcement.⁠¹⁠⁴ Amazon's own results and the stock's reaction are covered in our analysis of Amazon's stock drop.

What Anthropic says, and what the filing defines

CLAIMED. The S-1 says Claude has had the fastest enterprise adoption of any technology in history.⁠¹ No independent measurement accompanies that sentence in the sections I read.

DOCUMENTED definitions. Net Revenue Retention of about 900% at 30 September divides the last three months' revenue from customers who paid at least $1 a year earlier by those customers' revenue in the three months a year before, and it excludes Claude Pro and Max subscribers.⁠¹ The S-1 defines Run-Rate Revenue as trailing 28-day consumption fees times 13, plus monthly subscription fees times 12.⁠¹ The Series H announcement cites run-rate revenue of $47 billion without a definition.⁠⁴ Recognized revenue for the first half was $16.3 billion.⁠¹

The S-1 counts customers by spend, not by type: more than 11,900 at $100,000 or more over twelve months, more than 1,900 at $1 million, about 250 at $10 million.⁠¹ It says it does not track an enterprise category and uses the $100,000 threshold as its stand-in.⁠¹ CLAIMED, company-defined: adjusted operating income of $1,618 million (a 10% margin) and adjusted net income of $2,671 million for the first half. The reconciliations sit in a section this article did not review.⁠¹

Who controls the company after the offering

DOCUMENTED. A limited liability company owned by the seven co-founders named in the filing (Dario Amodei, Daniela Amodei, Tom Brown, Jack Clark, Jared Kaplan, Sam McCandlish and Christopher Olah) will hold one Class F share carrying 50.1% of total voting power on general stockholder matters.⁠¹ The Long-Term Benefit Trust, which the filing describes as five trustees, holds Class T stock that elects a majority of the board. The trust and the founders' company together can elect every director.⁠¹ The filing calls Anthropic a controlled company under Nasdaq rules and says it does not expect to use the exemption except for its nominating committee.⁠¹

Class A holders as a group cannot hold a majority of the votes on general matters, because Class F carries 50.1% of the total.

DOCUMENTED. Anthropic contributed 846,840,960 Class N shares, 5% of fully diluted shares at 30 June 2026, to its Public Benefit Fund. The board approved a framework to issue up to 2% more each time the share price rises 50% above the prior milestone, starting at the offering price. Each co-founder pledged 80% of their personal equity to philanthropy.⁠¹

No price range, offering size or Q3 revenue figure is in the filing

Each gap below matters for a reader trying to test the headlines.

• Price range, share count and proceeds. DOCUMENTED as blank on the cover and in the summary tables. Neither the $100 billion total nor a valuation can be tested against the filing.⁠¹
• The company and selling-stockholder split. DOCUMENTED as blank. It decides how much of any total reaches Anthropic's balance sheet.⁠¹
• Q3 2026 revenue and total compute commitments. The dollar amounts are blank in the copy I read, although the filing gives other 30 September metrics. It says substantially all of the commitments are for compute and infrastructure, and most of the remainder falls between 2031 and 2045.⁠¹
• The fair-value charge after conversion. DOCUMENTED. The pro forma tables include an adjustment to remove the fair-value change tied to the notes' conversion. Its amounts are blank.⁠¹
• The change of accountants. DOCUMENTED. The filing has a section on the change, and an exhibit holds a Grant Thornton letter on it. This article did not review that section.⁠¹
• The Pentagon dispute. REPORTED by AP: the Pentagon designated Anthropic a supply chain risk after it refused unrestricted military use, courts have split, and both cases are on appeal. This article did not review how the filing treats it.⁠²

What to watch: the amended S-1 and an effective date

REPORTED. AP says the offering is expected next month, which is November 2026.⁠² The S-1 and Anthropic's announcement both say shares cannot be sold until the SEC declares the registration effective.⁠¹⁠³

The next dated document is an amended S-1 that fills the cover page. When it appears, compare the price range multiplied by the share count against the reported $100 billion, check the company and stockholder split, and look for the Q3 revenue figure and the pro forma net loss.