Anthropic’s latest draft IPO prospectus shows 825 million shares at $70 to $78 each, Reuters reported on 10 November, which works out to $57.75 billion to $64.35 billion, by our arithmetic. Reuters put the top at as much as $64.4 billion. Against the filing copy Anthropic sent bankers and then retracted, that is 41.7 million fewer shares (4.8%) and a top price $2 lower (2.5%), so the top of the raise is about $5.0 billion, or 7.2%, smaller.
On the 16.94 billion fully diluted shares implied by Anthropic’s S-1/A, the new band values the company at $1.19 trillion to $1.32 trillion before any new shares, by our arithmetic. With the new shares and a $26 billion placement it is up to $1.27 trillion to $1.41 trillion, about $37 billion below the top of the retracted copy.
Short explainer · IPO float
A Business Pill Short that uses this story as its worked example. Facts: Reuters reported a latest draft of 825 million shares at $70 to $78; on the about 16.94 billion fully diluted shares implied by the S-1/A, that is about 4.6% to 4.9% of the company, by our arithmetic (depending on how many shares are new).
Business Pill · Financial Conditions Explained
A short explainer on financial conditions. It teaches the general idea only and does not discuss this story.
The key insight: Anthropic’s latest draft prospectus, per Reuters, sells 825 million shares at $70 to $78, or $57.75 billion to $64.35 billion by our arithmetic: 41.7 million fewer shares and a $2 lower top than the copy it retracted, which takes about $5.0 billion, or 7.2%, off the top of the raise.
Reuters said Anthropic’s IPO “is set to raise as much as $64.4 billion, according to the latest draft prospectus seen by Reuters on Tuesday as the AI company geared up to launch its marketing of the deal”. The report adds that “the US company and some of its investors plan to sell shares in an indicative price band of between $70 and $78 per share” and that “deal details are expected to be announced soon”.
The 825 million figure is in Reuters’ headline, carried as a news flash: “Anthropic IPO to sell 825 million shares, latest draft prospectus shows”. Anthropic did not respond immediately to a request for comment, Reuters said. The Reuters text we read does not say how many of the shares are new and how many come from existing holders.
A post on X by IPONewsroom, a relay account citing Reuters, said AMD, Broadcom, Google, Micron, Microsoft, Nvidia and TSMC “will also buy $26 billion of stock in a separate private placement”. The same seven and the same $26 billion were in the retracted copy, Reuters reported earlier; our placement piece covers that stock. We could not confirm the placement in the Reuters text we read.
Anthropic’s IPO size at the bottom, midpoint and top of each band: the filing copy it sent bankers and then retracted (866.7 million shares at $70 to $80) against the latest draft prospectus (825 million shares at $70 to $78), both as reported by Reuters on 10 November and neither in a public filing. Dollar totals are our arithmetic, shares times price.
The Retracted Copy Against the Latest Draft
The retracted copy showed 866.7 million Class A shares at $70 to $80, raising up to $69.3 billion, according to Reuters’ earlier report; its low end was $60.7 billion, by our arithmetic. The latest draft keeps the $70 bottom, so the low end of the raise falls only with the share count: by $2.92 billion, or 4.8%, to $57.75 billion, by our arithmetic.
The top falls on both counts: $78 instead of $80 on 41.7 million fewer shares, from $69.34 billion to $64.35 billion. At the midpoints, $74 on 825 million shares is $61.05 billion, against $65.0 billion at $75 on the earlier count, all by our arithmetic.
On the league table we built this morning, the new top would be 74.6% of the $86.25 billion SpaceX raised in its June 2026 IPO, and the new low end 1.96 times the $29.4 billion of Saudi Aramco’s IPO, by our arithmetic.
What the Band Implies for Valuation
The S-1/A says Anthropic contributed “846,840,960 shares of our Class N common stock, representing 5% of our fully diluted shares as of June 30, 2026”. That gives about 16.94 billion fully diluted shares, the base our share-count piece used. At $70 that base is worth $1.19 trillion and at $78 it is $1.32 trillion; each $1 of share price is about $16.9 billion, by our arithmetic.
Adding shares gives an upper bound. If all 825 million were new, and the $26 billion placement bought 371.4 million shares at $70 or 333.3 million at $78, the total is $1.27 trillion to $1.41 trillion, by our arithmetic. If 23.3 million were sold by holders, as in the retracted copy, the totals are the same to three significant figures. The retracted copy gave $1.27 trillion to $1.45 trillion on the same method.
The $70 bottom is within 4 cents of the $70.04 a share that Anthropic’s own option values imply at 30 September, by our arithmetic of its S-1/A option table.
The Structural Read
As we read the two copies, the change sits at the top: the $70 bottom is unchanged, so the low end of the raise moves only with the share count, down 4.8%, while the top moves on both price and count, down 7.2%, by our arithmetic.
As we read the share base, the new $78 top takes about $37 billion off the upper valuation bound, from $1.45 trillion to $1.41 trillion, by our arithmetic; the low end, near $1.27 trillion, barely moves.
Reuters, 10 November 2026
“The US company and some of its investors plan to sell shares in an indicative price band of between $70 and $78 per share”
Three Implications
FOR IPO BUYERS The band is in a draft prospectus Reuters says it has seen, not in a public filing; the latest filing on EDGAR when we checked was the 2 November S-1/A, with the range blank.
FOR THE RECORD BOOKS At $57.75 billion to $64.35 billion, the offering would be 67.0% to 74.6% of the $86.25 billion SpaceX raised, and 1.96 to 2.19 times Saudi Aramco’s $29.4 billion, by our arithmetic.
FOR EXISTING HOLDERS Reuters says the company and some of its investors plan to sell; the Reuters text we read does not give the split between new and existing shares.
The framework argues: “That is the structural read, and it changes the valuation logic at every layer beneath it.”
As we read it, the IPO is where that logic gets a market price: between the retracted copy and the latest draft, the top of the band moved by $2 a share, which on the 16.94 billion share base is about $34 billion of value, by our arithmetic. The framework predates both copies and does not discuss them.
What Is Not Established
The band is not in any public filing. Reuters describes a draft prospectus it has seen, not a filing. When we checked EDGAR at 10:52 UTC on 10 November, and again before publishing, the latest filing was the 2 November S-1/A, with the range blank; our piece on the registered amount covers what it does show.
The split between new and existing shares, any underwriters’ option and the final price are not in the Reuters text we read. Anthropic told bankers the pricing in the earlier copy was inaccurate, Reuters reported then. The planned trading dates are in our timetable piece, and the full picture is in our Anthropic IPO map.
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Anthropic’s latest draft, per Reuters, sells 825 million shares at $70 to $78, or $57.75 billion to $64.35 billion by our arithmetic: 4.8% fewer shares and a $2 lower top than the copy it retracted. On its S-1/A share base, the top of the band is about $37 billion below the retracted copy’s $1.45 trillion; none of it is in a filing yet.
A note on sourcing. The latest-draft terms are from Reuters’ report and headline of 10 November 2026, read via StreetInsider and Moomoo syndication; Reuters says it saw the draft prospectus, which is not in a public filing. The retracted copy’s terms are from Reuters’ earlier report the same day. The placement line is from a relay post on X citing Reuters and was not confirmed in the Reuters text we read.
The 16.94 billion share base is our arithmetic from Anthropic’s S-1/A of 2 November. Totals, changes and ratios are our arithmetic. Anthropic did not respond immediately to Reuters; it was not contacted for this piece.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
