Anthropic’s IPO has drawn orders of about six times the 825,000,000 shares on offer, Bloomberg reported on 12 November, but its amended S-1 names buyers for only a small part of the deal. Of the $61.05 billion base deal at the $74 midpoint, at least $47.84 billion, or 78.4%, has no named or disclosed buyer, by our arithmetic.
The rest is three caps: retail allocations of up to 20%, $12.21 billion, and non-binding interest of up to $303 million from board members, both in the filing, plus up to $700 million from Taiwan’s Fubon Life, as reported by Taiwan’s Central News Agency. The names sit in the side deal: seven suppliers buy the separate $26.0 billion private placement, the filing says.
Business Pill · IPO Float
A short explainer on IPO float, the share of a company sold in its listing. It teaches the general idea and does not discuss Anthropic’s offering.
The key insight: As we read the S-1/A, the filing names the buyers of the side deal, not of the IPO: seven suppliers take the $26.0 billion placement, while in the $61.05 billion base deal only caps are disclosed, leaving at least 78.4% with no named buyer, by our arithmetic.
Bloomberg first reported on 11 November that the IPO was multiple times oversubscribed, with demand driven by “large indications of interest from prospective investors, known as anchor-size orders”, according to Investing.com’s account of the report, as our oversubscription piece set out. On 12 November Bloomberg put the book at about six times; its first sentence, as quoted on X, says the IPO “has drawn about six times the orders for the shares available”.
On 13 November Bloomberg reported, citing people familiar, that institutional investors based in mainland China and Hong Kong have been excluded from placing orders, partly over US arms-export rules. It added that “some prospective investors are continuing to pursue possible ways to bid”. Our piece on the China exclusion has the detail; the part of Bloomberg’s article we read does not say how much demand that covers.
One buyer has named itself. Fubon Financial announced on 13 November that its unit Fubon Life will subscribe for up to $700 million of IPO shares, Taiwan’s Central News Agency reported; the share count and price are to be announced once set. Taiwan sits outside the reported exclusion. At $74 a full order would be about 1.1% of the base deal, by our arithmetic.
Anthropic’s 825,000,000-share base deal at the $74 midpoint, split into the retail cap and the board members’ non-binding interest from its S-1/A of 10 November, Fubon Life’s reported maximum, and the remainder with no named buyer, against the separate $26.0 billion Class N placement. All three named amounts are maxima; the remainder and dollar values are our arithmetic. The book of about six times is Bloomberg’s report and is not added to these figures.
What the Filing Names
The placement.Google, NVIDIA, AMD, Broadcom, Micron, Microsoft and TSMC “will purchase, severally and not jointly, an aggregate of $26.0 billion of our Class N common stock from us in a private placement at a price per share equal to the initial public offering price”, the S-1/A says. At $74, Google and NVIDIA take about $10.0 billion each, AMD $2.5 billion, Broadcom, Micron and Microsoft $1.0 billion each and TSMC $500 million. Our placement piece covers the non-voting stock.
Board members. The filing says certain directors and related entities “have indicated an interest in purchasing shares of our Class A common stock in this offering at the initial public offering price at an aggregate purchase price of up to $303 million”. It adds: “Because these indications of interest are not binding agreements or commitments to purchase”, the underwriters could sell them more, fewer or no shares.
Retail. The S-1/A lists Charles Schwab, Fidelity, Robinhood, Trade-PMR, SoFi and E*TRADE from Morgan Stanley as selling group members for retail orders. It says “In the aggregate, we currently expect allocations to retail investors, both in the United States and in other countries, to represent up to 20% of the shares of Class A common stock offered pursuant to this prospectus, though final amounts will be based on actual demand in the offering”. That is up to 165 million shares, our retail piece found.
Within that, the European prospectus filed on 12 November offers up to 80,135,135 shares to retail investors in nine European countries and Switzerland, about $5.93 billion at $74, as our piece on Europe’s slice reported. A UK retail offer through RetailBook opened on 10 November, according to Hargreaves Lansdown.
What the filing leaves out. The 22 underwriters’ share-allocation column is blank, as our piece on the banks noted. The selling restrictions carry notices for 25 markets, and the words Hong Kong appear 0 times in the S-1/A. By our text search, the filing contains no directed share programme: the phrases directed share, reserved share and friends and family appear 0 times.
The Order Book in Dollars
At the $74 midpoint the base deal is $61.05 billion. The retail cap is $12.21 billion, or 20.0%; Fubon Life’s maximum is 1.1%; the board members’ indications are 0.5%. Take all three away and at least $47.84 billion, 78.4%, is left with no named or disclosed buyer, by our arithmetic. Because each of the three is a maximum, the unnamed part can only be larger.
The placement is not part of that deal. It is a separate class of stock, $26.0 billion, equal to 42.6% of the base deal, and 29.9% of the $87.05 billion the IPO and placement together come to at $74, by our arithmetic. Google and NVIDIA together account for 76.9% of it.
The reported book is a different measure again. About six times 825,000,000 shares is about 4.95 billion shares of orders, about $366.3 billion at $74, and about $305.2 billion beyond the base deal, by our arithmetic. Orders are not allocations, so we do not add the book to the named amounts; the chart sets each piece against the base deal and labels which are filed and which are reported.
Who Already Owns Shares, and Who Buys After
Some buyers are in before the IPO. At least 18 US public pension funds hold Anthropic through venture funds, the Equable Institute says, and the 12 plans with a disclosed figure committed $817.9 million to Spark Capital funds named in the S-1, by our arithmetic in our pensions piece. Equable warns: “A commitment shows a path to Anthropic, not the size of a pension fund’s Anthropic stake”. Those are not IPO orders.
The underwriters have stakes too. The filing says affiliates of Goldman Sachs, Morgan Stanley, J.P. Morgan, Cantor Fitzgerald and TD Securities hold shares, each under 0.5% of the fully diluted count as of 30 September.
Other money arrives once the stock trades. GraniteShares’ 2x long and 2x short Anthropic funds, AIL and ANS, became effective on 6 November but had not launched, our ETF piece found, and Direxion says it expects its pair to trade from the first day after Anthropic’s stock starts trading. Cboe’s Rule 4.3 would permit listed options from Monday 23 November if trading starts on 19 November, by our count in our week-ahead guide.
Vanda Research expects about $250 million of net retail buying on debut day, Reuters reported, as our piece on the forecast set out: 2.0% of the $12.21 billion retail cap, by our arithmetic.
The Structural Read
As we read the reports and the filing together, the book and the allocation are separate numbers: Bloomberg reported orders of about six times the shares, about $366.3 billion at $74 by our arithmetic, but allocations are confirmed on the first day of trading, Anthropic’s IPO site says.
As we read the named amounts, the largest buyers so far are Anthropic’s own suppliers: Google and NVIDIA account for 76.9% of the placement, by our arithmetic, a separate class of stock bought at the IPO price.
Anthropic S-1/A, 10 November 2026, on board members’ indications of interest
“Because these indications of interest are not binding agreements or commitments to purchase, the underwriters could determine to sell more, fewer, or no shares to any of these individuals or entities and these individuals or entities could determine to purchase more, fewer, or no shares in this offering.”
Three Implications
FOR IPO BUYERS Anthropic’s IPO site says allocations are confirmed on the first day of trading, which it expects on 19 November; retail allocations are capped at up to 20% of the shares offered, the S-1/A says.
FOR READING DEMAND HEADLINES Orders are not allocations: about six times the shares is about $366.3 billion of orders at $74, against a $61.05 billion base deal, by our arithmetic.
FOR THE PRICED PROSPECTUS The 22 banks’ allocation column is blank in the S-1/A, as our piece on the banks noted; the final filing is where the split will show.
The framework records: “the capex race is no longer a corporate spending cycle. It is a sovereign-scale financing problem dressed in tech-company clothing”.
As we read it, an IPO whose named buyers are its chip and cloud suppliers, $26.0 billion through the placement, fits that financing picture. The framework predates the IPO and does not discuss its order book.
What Is Not Established
Allocations have not been made. Anthropic’s IPO site says they are confirmed on the first day of trading, which it expects on 19 November. The filing does not say how the 78.4% will be split among institutions, how retail will be split between countries, or how much each bank places. Bloomberg’s sources are unnamed, and the part we read does not say how many investors were turned away or how much they sought.
Fubon Life’s final share count has not been announced, and the board members’ interest is not binding. We found no other buyer that has disclosed an order. The range is still $70 to $78; The Information reported a valuation target of $1.25 trillion to $1.4 trillion, covered in our valuation piece. Anthropic was not contacted for this piece.
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Anthropic’s book is reported at about six times the shares on offer, but the filing names only caps: up to 20% for retail and up to $303 million from board members, with Fubon Life’s reported $700 million on top. At least $47.84 billion of the $61.05 billion base deal, 78.4%, has no named buyer, by our arithmetic, while the $26.0 billion placement names all seven. Our Anthropic IPO map tracks pricing, and the company’s $131.8 billion cash pile shows what it holds before the money arrives.
A note on sourcing. This analysis assembles facts from our earlier reporting on the Anthropic IPO, each linked in the text, and from Anthropic’s S-1/A filed with the SEC on 10 November 2026, which we re-read on 14 November after checking that no newer registration filing was on EDGAR. Bloomberg’s reports are cited as they were read for those pieces: headlines, opening paragraphs and its first sentence as quoted on X; the rest is paywalled.
Fubon Life’s plan is as reported by Taiwan’s Central News Agency. The dollar values and shares are our arithmetic at the $74 midpoint; the named amounts are maxima, and the reported book is not added to them. Anthropic 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.
