Anthropic's $1.4T IPO is really a $1.02T IPO

Anthropic priced its IPO at $70 to $78 a share, and the headline says $1.404 trillion. Count only the shares that will actually exist after the offering — about 13.09 billion of them — and the company is worth $1.02 trillion at the top of the range.

What the filing actually says

Anthropic filed an amended S-1 on Tuesday, November 10, and the blanks are finally filled in: 825 million Class A shares, 801.4 million new and 23.6 million from existing shareholders, at $70 to $78 each. The public raise is $57.75 billion to $64.35 billion. Pricing is expected November 18, trading starts on the Nasdaq around November 19 under the ticker ANT, and up to 20% of the offering is earmarked for retail investors — far above the norm for an IPO this size. Underwriters led by Goldman Sachs and Morgan Stanley get a 15% greenshoe: 123.75 million more shares.

The $1.404 trillion figure is real, but it is a fully diluted number. It divides the top price by roughly 18.0 billion shares — a count that includes employee awards and other stock not yet issued. On the roughly 13.09 billion shares that will actually be outstanding after the deal, the range implies $916 billion to $1.02 trillion. The gap is $383 billion, or 27.3% of the headline. At the bottom of the range the fully diluted number is $1.26 trillion, which is why the honest range is $1.26–1.41 trillion, not a single "$1.4 trillion company."

The suppliers are buying the customer

The second number in the filing is stranger than the first. Anthropic will privately sell $26 billion of non-voting Class N stock at the IPO price to AMD, Broadcom, Google, Micron, Microsoft, Nvidia, and TSMC. Google and Nvidia are putting in $10 billion apiece. That $26 billion is 40.4% of the maximum public raise — the side deal is nearly half the size of the IPO itself.

Read that list again: it is Anthropic's chip suppliers and cloud providers. The companies that sell Anthropic its compute are becoming some of its largest shareholders, at whatever price the IPO settles on. Total net proceeds, IPO plus placement, run $84.6 billion to $93.7 billion if the greenshoe is fully exercised. Anthropic already holds about $132 billion in cash and short-term investments; after this it will hold roughly $226 billion. That is the war chest for the other number in the filing: $900.9 billion in compute and infrastructure commitments, or 11.1 years of its current run-rate revenue.

The range was already cut once — today

The filing that went out this morning was not the first version. Reuters reported that Anthropic initially sent bankers a filing showing 867 million shares at $70 to $80, then emailed that the details were "inaccurate" and replaced it with 825 million shares at $70 to $78. The top-of-range raise fell $5.01 billion in a single correction, from $69.36 billion to $64.35 billion.

It is the second markdown in as many months. Investors were talking about a $2 trillion valuation in early October; last week some told the Wall Street Journal that even $1.5 trillion would need to come down after the AI sell-off. From $2 trillion to $1.404 trillion fully diluted is a 29.8% walk-down — and on shares outstanding, the walk-down is closer to 49%.

The founders cash out and keep control

Seven co-founders — CEO Dario Amodei, president Daniela Amodei, chief compute officer Tom Brown, Anthropic Institute head Jack Clark, chief science officer Jared Kaplan, chief architect Sam McCandlish, and interpretability lead Christopher Olah — are each selling nearly 3.4 million shares. At the $74 midpoint that is about $251.6 million each, roughly $1.76 billion combined. Existing shareholders as a group are selling just 2.9% of the offering; the founders are most of it.

They are not giving up control. As a public benefit corporation, the founders hold a Class F share with 50.1% of the voting power, and the Long-Term Benefit Trust will elect a board majority. The public — including that unusually large 20% retail slice — is buying economics, not a say.

The growth is real. So is the bill.

The filing's new operating numbers are the strongest part of the story. Run-rate revenue reached $81 billion by the end of October, up about $10 billion in a single month from the end of September. Q3 revenue was $17 billion; nine-month revenue $33.2 billion, up from $2.5 billion a year earlier. The prospectus calls Claude's uptake "the fastest enterprise adoption of any technology in history."

The other side of the ledger has not shrunk. The nine-month net loss is $104 billion — 3.13 times revenue — driven by stock-based compensation, and the $900.9 billion in commitments is the number that will decide whether either valuation is right. At 17.3 times run-rate revenue on the headline number, or 12.6 times on shares outstanding, Anthropic is priced as a company that will grow into its compute bill. The IPO gives it roughly $226 billion in cash to try. Whether $81 billion of run-rate revenue can carry $900.9 billion of promises is the question the market starts answering on November 19 — and the range has already been cut twice before a single share has traded.

Sources: TechCrunch, "Anthropic sets IPO price range of $70 to $78 per share," November 10, 2026; CNBC (via Decrypt, November 10, 2026) for pricing November 18 / trading November 19 and the fully diluted $1.404 trillion calculation; The Times, "Anthropic seeking $1.4trn valuation in blockbuster IPO," November 10, 2026, and Reuters for the retracted 867-million-share / $70–$80 draft filing; MadRobot, November 10, 2026, for the 13.09-billion-share outstanding count; Anthropic Form S-1/A, Amendment No. 2 (SEC). All arithmetic in this piece was recomputed from the filing figures; the $1.404 trillion is CNBC's fully diluted calculation, not a number stated in the filing itself.