As of October 21, 2026, Anthropic has not announced an IPO date. Bloomberg and Reuters report a listing in mid-November on Nasdaq, with Morgan Stanley, Goldman Sachs, JPMorgan and Citigroup among the banks, a raise of as much as $100 billion, and a valuation that investors put between $1.5 trillion and $2 trillion. All of this comes from people familiar with the matter, not from the company, and can change.
No Japanese broker has announced whether retail investors here can apply. The precedent is SpaceX in June 2026, when Rakuten Securities, SBI Securities and Mizuho Securities ran a lottery for Japanese customers. Whether Anthropic follows the same route depends on the underwriters and will be known only when a broker announces it.
Anthropic is a San Francisco AI company founded in 2021 that develops the Claude family of AI models and sells them to businesses and consumers. On May 28, 2026 it raised $65 billion in a Series H round at a $965 billion post-money valuation, and on June 1 it said it had confidentially submitted a draft registration statement (S-1) to the U.S. SEC. The public prospectus had not appeared on EDGAR as of mid-October.
Timing: Bloomberg reported on October 1 that Anthropic aims to go public as soon as mid-November, after meeting prospective investors on October 14. Reuters earlier reported a listing before the U.S. midterm elections. Nothing is fixed until the public S-1 and a price range are filed.
Size: Reuters reported on September 11 that Anthropic is seeking to raise as much as $100 billion. At 150 yen to the dollar that is about 15 trillion yen. SpaceX, the largest IPO in history so far, raised $75 billion in June ($86 billion including the over-allotment). For scale, Japan's largest IPO of 2025, JX Advanced Metals in March, raised 438.6 billion yen at a 761.3 billion yen market value; the reported Anthropic numbers are more than 30 times the raise and 300-400 times the valuation.
Valuation: investors have projected about $2 trillion (CNBC, Bloomberg), while Reuters reported in October that some investors were weighing around $1.5 trillion. SpaceX listed at $1.77 trillion. Any of these would make Anthropic one of the most valuable companies in the world on day one.
Financials, per a draft prospectus reviewed by Reuters: 2025 revenue of about $4.6 billion with an operating loss of about $8.1 billion; second-quarter 2026 revenue of $11.6 billion and third-quarter revenue of $16.8 billion; a first-half 2026 net loss of $80.7 billion, of which $72 billion was a non-cash charge tied to the rising value of convertible bonds; and at least $518 billion of computing and infrastructure commitments over a decade.
There is good reason to doubt the date. The schedule has slipped twice already: Reuters reported in early September that marketing would start in mid-October, and Bloomberg reported on October 1 that the target was mid-November. As of mid-October the public S-1 had not been filed, and U.S. rules require the registration statement to be public for at least 15 days before the roadshow begins, so marketing in the week of November 9 needs a public filing by late October.
Investors and the company are also apart on price: the company has been associated with a $2 trillion figure, while Reuters reported in October that some investors were weighing about $1.5 trillion, and that some who met the company on October 14 were disappointed by the third-quarter growth rate of 45%. Add the $80.7 billion first-half loss (mostly a non-cash charge), $518 billion of compute commitments, litigation with the U.S. Department of Defense and a temporary export control in June 2026, and there is a lot to explain. November is possible; a slip into December or later would not be surprising. A delay does not change what the company is worth, and for a Japanese retail investor the question that matters is not when, but whether you can apply.
Normally a U.S. IPO is out of reach for Japanese retail investors: the shares are allocated by U.S. underwriters, and the first chance to buy is on the exchange after listing. SpaceX broke that pattern. On May 27, 2026 Rakuten Securities and SBI Securities announced they would offer SpaceX shares to Japanese customers at the offer price through a lottery, and Mizuho Securities, whose U.S. arm was in the syndicate, also took applications.
At Rakuten the terms were: applications from June 5 to 2:00 a.m. on June 12, one-share units, settlement in yen, no purchase fee and no FX spread on the IPO purchase, eligible for the NISA growth quota, and funds required by the lottery deadline (shares x offer price x exchange rate x 1.05). SpaceX priced at $135 on June 11, opened on Nasdaq on June 12 (ticker SPCX) and closed its first day at $161, up 19%. Trading for Japanese customers started around 22:35 Japan time on listing day.
What this means for Anthropic: a Japanese lottery is possible, but only if the underwriters allocate shares to Japanese brokers and a broker chooses to offer them. The SpaceX offering was arranged through a Japanese securities registration, which takes time, so an announcement would likely come a few weeks before listing. Until a broker publishes an IPO page for Anthropic, treat it as not available.
Several things trip up investors used to Japanese IPOs. There may be no indicative price range: SpaceX fixed its $135 price before the roadshow and asked investors only whether they would take it or not; Anthropic's approach is unknown. Units are single shares, not lots of 100, so the minimum outlay is smaller. The shares are priced in dollars, so a stronger yen can erode a gain; at Rakuten the SpaceX purchase carried no FX spread, but converting sale proceeds back to yen cost the usual 25 sen per dollar. Trading happens at night in Japan (22:30-5:00 or 23:30-6:00 Japan time), including the first trade.
Allocation is tilted toward institutions: SpaceX split 70:30 between institutions and retail, and Japanese retail got a slice of the 30%. Lock-ups work as in Japan, typically 180 days in the U.S. Tax is Japanese tax if you trade through a Japanese broker (20.315% on gains, tax-free in NISA); U.S. dividend withholding does not matter for now, since no dividend has been reported or planned.
Per Reuters' reporting on the draft prospectus, revenue went from $4.6 billion for all of 2025 to $11.6 billion in the second quarter of 2026 and $16.8 billion in the third, mostly from businesses paying to use Claude. Bloomberg put annualized revenue at $65 billion in September. A $2 trillion valuation would be roughly 30 times that.
The worries are cost and accounting. Anthropic spent nearly $9 billion on computing and infrastructure in the first half of 2026 (up from $2.3 billion a year earlier) and has committed to at least $518 billion over a decade, so the question is whether revenue keeps pace with those commitments. The first-half net loss of $80.7 billion includes a $72 billion non-cash charge from the rising value of convertible bonds, which does not burn cash but makes an ugly headline. External factors include a temporary U.S. export control on its top models in June 2026 that slowed growth, and ongoing litigation with the U.S. Department of Defense. These bear on the price more than on whether the listing happens.
When can I buy? If a Japanese broker announces an offering, during its application period; otherwise from the evening of listing day, Japan time, as a U.S. stock. No date has been set as of October 21, 2026. In yen? For SpaceX, Rakuten settled in yen and SBI in dollars (a foreign stock account was required); Anthropic's terms await the brokers' announcements. In NISA? SpaceX was eligible for the growth quota at both brokers, within the 2.4 million yen annual limit.
How many shares? U.S. stocks trade in single shares; SpaceX could be applied for from one share. What are the odds? Unknown; brokers did not publish SpaceX lottery rates, and only part of the 30% retail allocation reached Japan. Should I sell on day one? This site's rule of thumb for Japanese IPOs is to sell at the first price, but whether it carries over to giant U.S. listings is unproven; SpaceX closed 19% above its offer price on day one, which is one data point. Dividends? None have been reported or planned; this is a growth company, not an income stock.
You can still buy the shares after listing through a U.S. stock account at any major Japanese online broker, usually from the evening of listing day Japan time. Be aware that the first traded price of a hot IPO is often well above the offer price (SpaceX opened 19% above), so buying on day one is a different bet from winning the lottery.
Some ETFs and funds hold Anthropic stock indirectly through pre-IPO vehicles. They carry their own fees and tracking issues, and this site does not cover them; check each product's documents.
Watch for three things: the public S-1 on EDGAR (which fixes the share count and price range), an IPO page at Rakuten, SBI or Mizuho, and the pricing date. If you want to be ready, a U.S. stock account and a NISA account take days to open, so set them up before the announcement.
This site covers Japanese IPOs and does not forecast first-day prices for U.S. listings. Everything above is from public reports and company announcements as of October 21, 2026; valuations and timing are reported, not confirmed, and an IPO of this size can slip. We will update this article when a Japanese broker announces its handling.
Nothing here is investment advice. Shares can and do open below their offer price.
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