AI Guides › Playbooks
By Nigel Guy · 6 min read
Most people hear "Anthropic has filed to go public" and either shrug or start quoting a headline figure, usually a revenue number, as if it came from a finished public document. It didn't. The filing is real, but the detailed numbers now circulating come from press reports of a draft that nobody outside the process can open, and they mix periods and accounting bases in ways that make casual comparison misleading.
The rule: never repeat an IPO number until you can say who published it, which period it covers and what it measures.
On 1 June 2026, Anthropic published a short notice on its own site saying that Anthropic, PBC had confidentially submitted a draft registration statement on Form S-1 to the US Securities and Exchange Commission (SEC) for a proposed initial public offering of its common stock. The notice says this gives the company the option to go public after the SEC completes its review, that the number of shares and the price have not been set, and that it is not an offer to sell securities. It was issued under Rule 135 of the Securities Act, which limits what a company may say at this stage.
That is the whole of the official position at time of writing. A confidential draft is a private conversation with the regulator. It sets no date and promises no listing.
Under SEC staff procedures for nonpublic review, a company must publicly file the registration statement, and its earlier confidential drafts, at least 15 days before starting a roadshow (or, with no roadshow, 15 days before the requested effective date). So the full document will become public before shares are sold, but as of 4 October 2026 we could not find it on EDGAR, the SEC's public database.
Late in September 2026, Reuters reported on a draft prospectus it had reviewed, and outlets including Fortune and 24/7 Wall St repeated the figures. Treat everything below as reported, not filed. Dollar conversions are rough, about £0.75 per $1, so check the live rate.
| Item | Reported figure | Period | Roughly in sterling |
|---|---|---|---|
| Revenue | $4.59bn | Full year 2025 | about £3.4bn at time of writing |
| Operating loss | about $8.06bn | Full year 2025 | about £6bn |
| Net loss | nearly $42bn | Full year 2025 | about £31bn |
| Cash and equivalents | $20.28bn | Reported alongside 2025 | about £15bn |
| Revenue | $4.73bn | Q1 2026 | about £3.5bn |
| Revenue | $11.5bn | Q2 2026 | about £8.6bn |
| Cloud and data-centre commitments | about $518bn | About ten years, per one outlet | about £390bn |
| Reported ask | up to $100bn at over $2tn valuation | Proposed | about £75bn and £1.5tn |
For context, the company's last private valuation was reported as about $965bn after a Series H round in May 2026 (about £720bn at time of writing).
Every figure gets three boxes filled in before you use it. If a box is empty, the number goes in "reported, unchecked", not in your notes as fact.
Hypothetical: a friend says, "Anthropic lost $42bn on $4.6bn of revenue, so it's finished." Run the card. Source: a leaked draft, reported second-hand. Period: calendar 2025. Basis: the $42bn is a net loss, which one report described as mostly non-cash charges, while the operating loss is about $8bn. Those are different questions. Meanwhile the same reports put Q2 2026 revenue at $11.5bn and describe operating profitability in recent quarters, again on the company's own definitions. The honest summary is: "Reported 2025 numbers show a very large accounting loss, the 2026 quarters look very different, and none of it is verifiable until the public filing." That is less quotable and more accurate.
If you build on Claude or pay for it, an IPO changes the company's disclosure, not your product tomorrow. Once public, a prospectus must set out risk factors, customer concentration (one report says about a quarter of revenue came from two customers), and spending commitments. That is useful for judging vendor stability, which is a reasonable thing to weigh before you commit a business process to one supplier.
Fill in the bracketed parts, then paste the article text yourself.
You are a careful financial-news fact-checker writing for a non-specialist UK reader.
Goal: sort every number in the text below into a Period-and-Basis Card.
Text: [PASTE_ARTICLE_TEXT]
Company: [COMPANY_NAME]
Steps:
1. List each figure with: who is cited as the source, the period it covers, and what it measures (revenue, operating result, net result, adjusted, forecast, commitment).
2. Mark each figure "filed publicly", "company statement", or "reported from a document I cannot see", using only what the text itself says.
3. Flag any comparison that mixes periods or bases.
4. Give a two-sentence plain-English summary that repeats no figure unless its period and basis are stated.
Rules: if the text does not state a source, period or basis, write "not stated" rather than guessing. Do not add figures from memory. If anything essential is missing, ask me before answering.
Before you answer, check that every number in your output appears in the text I gave you.