What an IPO and an S-1 filing mean
In an IPO, a private company lists its shares on a stock exchange for the public for the first time. Before that, in the US the company has to submit a registration statement to the SEC, called an S-1. It contains revenue, losses, expenses, major customers and risks.
The S-1 becoming public means anyone can now read it. The chance to buy shares comes when the roadshow is complete, the price is set and trading begins on the exchange. Date and price can change between these steps, so a filing should not be taken as a guarantee of listing.
For an ordinary reader, four parts of an S-1 are the most useful: Summary, Risk Factors, Use of Proceeds (where the money will go) and financial statements. In Risk Factors the company itself writes what could go wrong for it, and that part often says the plainest things.
What Anthropic filed
Anthropic sent a confidential draft S-1 to the SEC on 1 June 2026. The public S-1 came on 26 October 2026. In it, the company wants to list Class A common stock on the Nasdaq Global Select Market under the ticker ANT. Goldman Sachs and Morgan Stanley are the lead banks, and in this offering existing shareholders will also sell their shares along with the company.
Reports mention raising $100 billion or more, and the valuation is being put between $1.5 and $2 trillion. The Irish Times report says investors expect $1.5 to $1.75 trillion, whereas in August the estimate was $2 trillion. This means the valuation is not yet settled and the estimates keep changing.
To read the earlier history of Anthropic and Claude, see our post: What is Claude AI and Who Made It? Full History Explained (2026).
The numbers from the filing
Reports say these figures have come out of the filing:
- Revenue for the first six months of 2026: $16.3 billion
- Revenue for the whole of 2025: $4.6 billion
- Accounting net loss for the first six months of 2026: $80.7 billion
- Operating loss for the first six months of 2026: $9 billion
- Share of revenue from the five biggest customers in the first nine months of 2026: 25%
The speed of revenue growth shows first: six months of revenue is more than 3.5 times the revenue of the whole of 2025.
Do not read net loss and operating loss as the same thing. The operating loss of $9 billion is the loss from the company’s day-to-day work. The accounting net loss of $80.7 billion is much bigger than that, and more items go into it, so reading it directly as “that much cash was burned” can be wrong. Which items made up this figure can be known only by reading the financial statements in the S-1.
Having 25% of revenue resting on five customers is something to watch for investors who want to understand the company’s stability. How much the loss of one big customer would affect revenue will be known from the Risk Factors in the filing.
IPO date: what is certain and what is not
The only certain thing is that the public filing has been done. The date is not certain. According to Bloomberg, the roadshow could begin in the week of 9 November and trading could happen before Thanksgiving, by 26 November. The Wall Street Journal has mentioned the week of 16 November. Both reports are in the language of “could”, and if market conditions worsen, the timing can change.
Until an official announcement comes from Anthropic or Nasdaq, it is fine to treat a date written on any site as tentative. That includes the date written in this post too.
The fall of STAR50 in China
STAR50 is an index of the big AI and semiconductor companies. According to Reuters’ report, this index fell 40% in under four months, that is, $480 billion of market value was lost. This is a round figure, not an exact one.
In some companies the fall was even sharper. Chipmaker CXMT fell more than a quarter in the last one month, and MetaX Integrated Circuits has lost half its value since July. In some places this has been called the halt of a two-year rally.
The fall is not a one-day matter. On 14 September the Shanghai Composite closed 0.4% lower at 3,872 and the Shenzhen Component 0.8% lower at 13,370, and AI shares pulled both down.
Another number is also going around. A separate report has stated a $2.4 trillion drop in the market value of mainland China’s shares from May till now. This is a figure for the whole market and measures a different thing from STAR50’s $480 billion, so do not add the two together in one calculation.
Why China’s market rests so much on AI
According to Goldman Sachs’ estimate, 42% of the total value of China’s mainland and Hong Kong shares belongs to AI companies, and 57% of trading also happens in them. When one theme is such a big part, its fall shakes the whole market.
For this reason the effect of this fall can reach even people who did not put money in after hearing the name AI, because these shares can be a big part of mutual funds and index funds. Caixin’s report said that some domestic mutual funds had built concentrated positions in this sector and got a jolt.
There is a policy angle too. Citing Reuters, it was said that Beijing wanted to turn people’s savings toward shares to fund AI’s growth and build a “slow bull” market. The fall has given that effort a jolt. A Taipei Times report also says that Beijing is now pushing embodied AI, that is, robotics.
The reasons for the fall, as they came up in reports
No single reason is being blamed. These things have come up again and again in reports.
First, high valuations. Two years of rally had pushed China tech prices above Western and other Asian markets. Second, worry about AI demand and curbs on Chinese exports.
The third reason was IPO supply. In July a report said that because of CXMT’s planned $8.6 billion listing and the expectation of more big IPOs like Unitree, investors feared money would be pulled out of the broader market. Fourth, by the end of July a global tech sell-off had wiped out this year’s early gains from some Chinese AI and chip names.
Some analysts see this as an opportunity at cheaper prices, and some say that if the earnings outlook worsens, prices can fall further. In one report a UBS strategist said AI hardware valuations look near a trough, yet the same report shows ChiNext fell 4.4%. Prices that look cheap can fall too.
Looking at both stories together
Anthropic is a private company on its way to listing. STAR50 is a basket of already listed companies. In one story the question is how much new investors will value the company. In the other the question is whether the earlier prices were right or not.
A common question can be seen between the two: when and how much will the money put into AI come back. In Anthropic’s numbers, revenue growth and big losses show together. In China’s market the same question has landed on prices.
Still, these are different countries, different business models and different kinds of shares. Making one story the result of the other would be hasty. This much can be said, that when an atmosphere of a big AI IPO is building, falls in other markets can change investors’ mood. How much, nobody can say for sure right now.
Useful points for Indian readers
For an Indian reader who wants to check something from this news, these steps are useful:
- On the SEC’s EDGAR website, read the Risk Factors and financial statements part of Anthropic’s S-1
- Wait until the official announcement of the listing date and price range
- First confirm with your broker which rules about account, costs and tax will apply to you for US shares
- If you have already put money in a mutual fund or ETF, look at its top holdings to see how big a share China’s AI and chip shares have in it
On the first day of a new IPO, prices often swing sharply up and down. So taking a decision as soon as you hear the listing news is hasty. An investor who wants to go into US shares from India should know the rules and costs beforehand.
Who this post is for and who it is not for
This post is for students and readers who want to understand AI industry news in simple language, because here the filing’s numbers and their meaning are found in one place. It is also for beginner investors who are starting research, because here confirmed and unconfirmed things are written separately.
This post is not for people who want a direct answer on which share to buy, because no investment advice has been given here. It is also not for those who want daily trading signals, because this is a snapshot up to 2 November 2026. Those who need a full legal or accounting analysis of the S-1 should go to the filing and a professional advisor.
Next step
Today, read the Risk Factors part of Anthropic’s S-1 on the SEC’s EDGAR website, and ask your broker what setup your account needs for US shares. You can do these two things before the listing date is confirmed.
Sources
- https://builtin.com/articles/anthropic-ipo-filing-s1
- https://www.guru3d.com/story/anthropic-ipo-filing-shows-billion-first-half-accounting-loss/
- https://mena.entrepreneur.com/business-news/anthropic-files-for-nasdaq-ipo
- https://www.irishtimes.com/business/markets/2026/10/26/anthropic-begins-countdown-to-ipo-with-prospectus-filing/
- https://bernama.com/en/news.php?id=2626193
- https://cointelegraph.com/news/anthropic-artificial-intelligence-ipo
- https://www.thestandard.com.hk/innovation/article/344409/Anthropic-plans-mega-IPO-before-Thanksgiving-roadshow-on-November-9
- https://ascendants.in/my-money/anthropic-ipo-2026-filing-valuation-financials-indian-investors/
- https://fourweekmba.com/ai-china-ai-index-loses-480b-goldman-puts-ai-at-42-of-market/
- https://decrypt.co/381992/china-stock-market-lost-2-4-trillion-investors-doubt-ai-boom
- https://www.plindia.com/?p=45312
- https://tradingeconomics.com/china/stock-market/news/583363
- https://www.caixinglobal.com/2026-07-31/global-tech-rout-erases-gains-in-chinas-ai-stocks-jolts-mutual-funds-102469719.html
- https://www.businessday.co.za/world/international-companies/2026-10-26-global-tech-investors-should-take-heed-of-chinas-ai-meltdown/
- https://www.business-standard.com/markets/capital-market-news/china-stocks-fall-sharply-as-ipo-worries-weigh-on-tech-shares-126071700692_1.html
- https://finimize.com/content/china-tech-stocks-sank-as-ai-optimism-looked-shaky
- https://www.taipeitimes.com/News/feat/archives/2026/10/30/2003866853
Disclaimer
This post is for information only, not financial or investment advice. Losses can happen in shares, and the figures are based on media reports that can change. Do your own research before investing and talk to a registered advisor.
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