Anthropic’s IPO site sets out the next eight days: “Subject to regulatory clearance, the final IPO share price is expected to be set on November 18th(EST), and shares are expected to begin publicly trading on November 19th(EST)”. By our count, 19 November is 24 days after the public S-1 of 26 October.
This explainer lays out, date by date, what Anthropic’s S-1/A of 10 November, its IPO site, a broker’s terms and outlet reports say happens next. Filed facts and reported ones are labelled as such; nothing here predicts the price.
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 dates.
The key insight: Anthropic’s IPO site expects pricing on 18 November and trading on 19 November, subject to regulatory clearance; by our count, 19 November is 24 days after the public S-1 of 26 October, and the filing counts further lock-up releases at 27, 48, 62 and 76 days after the prospectus date.
The filing offers 825,000,000 Class A shares at an expected price “between $70.00 and $78.00”: Anthropic is “selling 801,351,354 shares” and selling stockholders “an additional 23,648,646 shares”. The shares are to list on Nasdaq under “ANT”. Our range piece covers the valuation at each end.
The IPO site says “The IPO process begins with a roadshow starting on November 10th(EST)”. On 11 November the Financial Times headlined a report that bankers “prepare to increase IPO valuation to $1.5tn or more”; that is reported, not filed, and our box covers it. Our EDGAR check at 06:10 GMT on 11 November found no amendment since the 10 November S-1/A.
Days after Anthropic’s public S-1 of 26 October for each expected step, by our count; pricing and trading dates are expected, subject to regulatory clearance, per ipo.anthropic.com; the 15 December date assumes an 18 November prospectus date.
Tuesday 17 November: Australian Requests Close
Broker Stake gives its Australian customers a window that opened “10am Wed 11 November 2026” and closes “5pm Tue 17 November 2026”, in Australian Eastern Daylight Time. CNBC reports that Anthropic “opened its Australian retail initial public offering on Wednesday”. Our Australia piece has the eight brokers and the terms.
The same evening in New York, NVIDIA says it “will host a conference call on Tuesday, November 17, at 2 p.m. PT (5 p.m. ET)” on its third-quarter results. Nvidia is one of the buyers in Anthropic’s private placement; we note the timing only.
Wednesday 18 November: Pricing Expected
The IPO site says the final price “is expected to be determined on November 18th(EST), based on regulatory clearance, investor demand and market conditions”. CNBC reported on 10 November, citing people familiar with the details, that Anthropic plans to price on that day; our piece on the trading date carries that report.
The filing also gives the underwriters an option, “To the extent that the underwriters sell more than 825,000,000 shares of Class A common stock”, to buy “up to an additional 123,750,000 shares” from Anthropic. Whether the range changes before pricing is not established; only the FT headline addresses it.
Thursday 19 November: First Trade Expected
The IPO site says investors’ accounts “will confirm your allocation on the first day of trading, which is expected to be November 19th(EST)”. Two items in the filing also point to that week.
First, the board moved the service-vesting date for “approximately 67 million RSUs” so that the condition “will instead be satisfied as of November 19, 2026”; the filing does not link that change to a trading date (our piece). Second, non-founder directors, officers and current or former employees may transfer up to 10% of their lock-up securities “on or after the commencement of trading of our Class A common stock on the first trading day following the date of this prospectus”. As we read it, that would be 19 November if the expected schedule holds.
Separately, the $26.0 billion private placement “is contingent upon, and is scheduled to close immediately subsequent to, the completion of this offering”, with the further conditions the filing sets out (our placement piece). The filing does not date that completion: its cover says the underwriters expect to deliver the shares “on or about” a date left blank. In Australia, Stake lists “Allocation results: Thu 19 November 2026” and trading from “Fri 20 November 2026” in AEDT; by our conversion, Nasdaq’s 9:30 a.m. New York open on 19 November is 1:30 a.m. on 20 November in Sydney.
After the Debut: The Day-Counted Releases
After that first-day release, the lock-up section counts further releases in days. One group of stockholders, those bound until the first-quarter results or the 180th day, may transfer “up to 6.0%” of their lock-up securities on the dates “27 and 48 days, respectively, after the date of this prospectus”. They may transfer “up to an additional 7.0%” at 62 and 76 days. Holders of more than 0.5% of the fully diluted shares get 1.8% and 2.1% on the same days.
Our arithmetic: if the prospectus is dated 18 November, those four dates fall on 15 December, 5 January, 19 January and 2 February, all Tuesdays. The filing counts from the prospectus date and moves any date that is not a trading day to the next trading day. Our unlock piece totals the shares.
Our Numbers
By our count, the roadshow runs eight days from its 10 November start to the expected 18 November pricing, and trading on 19 November would come 24 days after the public S-1. The first release the filing counts in days comes 27 days after the prospectus date; on an 18 November prospectus date, that is 15 December, by our arithmetic.
The Structural Read
As we read the filing, the expected first trading day lines up with two filed items: the RSU service-vesting date the board moved to 19 November and the employee release that opens on the first trading day after the prospectus date.
As we read the lock-up section, supply from existing holders arrives in steps rather than all at once: a first-day release for employees, then releases counted in days and tied to earnings dates.
Anthropic IPO site (ipo.anthropic.com)
“Subject to regulatory clearance, the final IPO share price is expected to be set on November 18th(EST), and shares are expected to begin publicly trading on November 19th(EST)”
Three Implications
FOR US BUYERS The IPO site says brokerage accounts will confirm allocations on the first day of trading, which it expects on 19 November.
FOR AUSTRALIAN BUYERS Broker Stake lists requests closing at 5pm on 17 November and allocation results on 19 November, in AEDT.
FOR HOLDERS The filing lets non-founder directors, officers and current or former employees transfer up to 10% of their lock-up securities from the first trading day after the prospectus date.
The framework records: “The Financial Times then compiled the totals: $725 billion combined for the Big Four in 2026, up 77% from $410B in 2025.”
As we read it, the buyers in Anthropic’s $26.0 billion placement, including NVIDIA, Google, Microsoft, AMD, Broadcom, Micron and TSMC, are suppliers to that buildout; the filing ties their purchase to the offering’s completion.
What Is Not Established
The final price, the date printed on the prospectus and whether regulatory clearance comes on schedule are not established; the IPO site makes both expected dates “Subject to regulatory clearance”. The FT’s $1.5 trillion figure rests on a headline we read, not on a filing. Australia’s share of the retail allocation and the expense from the RSU change, which the filing calls “material”, are also not established.
The full record of filings and reports is in our IPO tracker, and the retail allocation is in our retail piece.
This Week In The AI Supercycle
The Great Convergence of Capital, Power, and Geopolitics
This week’s issue: for two years the AI build-out was priced as a supply story, and last week as a credit story. This week it was priced as a permission story, and the answer arrived as a cost, not a ban.
Anthropic’s IPO site expects pricing on 18 November and trading on 19 November, subject to regulatory clearance. The filing moves the service-vesting date of about 67 million RSUs to 19 November, lets employees release up to 10% from the first trading day after the prospectus date, ties the $26.0 billion placement to the offering’s undated completion and counts further releases at 27, 48, 62 and 76 days.
A note on sourcing. Filed facts are from Anthropic’s S-1/A of 10 November 2026; expected dates are from Anthropic’s IPO site, broker Stake’s support page, NVIDIA’s call notice and the CNBC and Financial Times reports named in the text. Day counts and date conversions are our own. 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.
