Anthropic IPO Countdown: The listing will take place as early as November 16.

Anthropic has officially publicly filed its S-1 prospectus, planning to list on the NASDAQ as early as the week of November 16. According to reports from *The Wall Street Journal* and Reuters, the company has not announced the first trading day, but before the stock starts trading, executives and underwriters need to complete the investor roadshow, determine the offering price, and obtain final approval from the regulatory authority. If everything goes smoothly, this will not only be the most high-profile tech new stock of this year, but also one of the largest IPOs in the history of human finance.

From public filing to listing, Anthropic is facing a race against the calendar and rules.

According to SEC rules, there must be a waiting period of at least 15 calendar days after the public filing before the official roadshow can be launched, which means the roadshow can start as early as Tuesday, November 10. Following the fastest path allowed by the SEC, Anthropic could start trading as early as Monday, November 16. Referring to SpaceX's listing pace in June this year — public filing on May 20, first trading day on June 12, a total of 23 days — Anthropic's first trading day may fall on Wednesday, November 18. Both scenarios fall before Thanksgiving on November 26.

But the phrase "as early as" hides too many variables that need to be unpacked one by one. On November 11, the SEC is closed for Veterans Day, and the SEC is required to give two working days' notice before announcing the effectiveness of the filing. This means Anthropic cannot price its offering as early as Friday, November 13. Bankers are usually reluctant to price on Friday, because the stock will not trade until the following Monday, leaving investors exposed to two days of overnight risk. The midterm elections ended on November 3, and Thanksgiving falls on November 26, leaving Anthropic and its underwriters with an actual buffer period of only about one week. Any delay in the roadshow, pricing, or listing may push the trading into the holiday vacuum zone — investment banks will not launch a potentially record-breaking IPO in the week of Thanksgiving, because trading desks of institutional investors are understaffed by half in those days, leading to thin liquidity.

Two Sets of Figures in the S-1 Document

The timeline is a technical issue. What really determines whether this IPO can be landed at the expected valuation is the figures in the prospectus.

The first set of figures is growth. In the first nine months of 2026 ending September 30, Anthropic recorded revenue of 332 billion US dollars, a year-on-year increase of 1206%. The enterprise API business is the main source of revenue, and the penetration rate of Claude among enterprise customers continues to rise. At the operating level, the operating loss in the third quarter of 2026 was 567 million US dollars, narrowing by 81.6% year on year; the adjusted operating profit in the same period was 24.63 billion US dollars, compared with a loss of 1.284 billion US dollars in the same period of the previous year. However, affected by changes in the fair value of financial instruments such as convertible notes, derivative liabilities and SAFE, the net loss in the first nine months of 2026 expanded to 1.04 trillion US dollars, higher than the 251 billion US dollars in the same period of 2025. In the context where the AI industry is generally asked "when will it be profitable", the 1206% growth rate and the narrowing of operating losses at the same time are the most powerful materials for underwriters during the roadshow; but the expansion of net loss also reminds investors that book losses and operating losses need to be viewed separately.

The second set of figures is commitments. The S-1 document discloses that Anthropic's total commitment for computing power and infrastructure expenditure is as high as 8.954 trillion US dollars, of which 698 billion US dollars will be paid within the next 12 months. Putting these two figures in the same document constitutes the core tension of this IPO: the revenue of 332 billion US dollars in the first nine months corresponds to short-term bills of 698 billion US dollars, and long-term commitments of nearly 9 trillion US dollars. Revenue is growing, but bills are maturing at a faster speed.

This is not a gap that can be bridged by operating cash flow. IPO fundraising, subsequent additional issuance, bond issuance — these capital market instruments are the prerequisites for keeping the computing power contract chain running. The S-1 document itself also frankly lists risk factors, including "inability to obtain sufficient computing power required to run artificial intelligence systems" and "out-of-control artificial intelligence may pose an existential threat to humanity". The wording of the latter risk factor is not common in prospectuses, which reflects Anthropic's consistent safety narrative, but in the context of IPO, it is also a reminder: the long-term risks of the industry this company is in have not disappeared due to the short-term revenue growth.

November 16: The Touchstone for Public Pricing of AI Assets

Anthropic's IPO timeline is not an isolated listing operation. It is the last key node for the public market pricing of AI assets in 2026.

In the past few months, AI-related assets have undergone a round of systematic re-pricing in both public and private markets. On November 5, the NASDAQ Composite Index fell by 5.52% in a single day, the Philadelphia Semiconductor Index plummeted by more than 12%, and the total market value of tech stocks evaporated by about 2.5 trillion US dollars in one day. The private market tightened simultaneously: OpenAI's latest financing target was lowered from 300 billion US dollars to about 200 billion US dollars, and the valuation target was reduced from 1.4 trillion US dollars to 1.25 trillion US dollars, with the first received fund amounting to only 110 billion US dollars. The market's patience for AI assets is shifting from "willing to pay for how far the story goes" to "willing to pay for how fast the convergence is".

Anthropic's IPO is the first real public market test in this pricing shift. OpenAI is expected to go public in 2027 and is currently still raising funds in the private market; while Anthropic chose to enter the public market in November 2026, which means it will become the first large AI lab to accept quarterly scrutiny. Its pricing, first-day performance, and stock price trend in the first quarter after listing will directly set a reference anchor for OpenAI and the entire AI sector.

If Anthropic is successfully listed at the expected valuation and its stock price does not fall below the offering price on the first day, it will prove that the public market is still willing to provide financing for an AI company with rapidly growing revenue but nearly 9 trillion US dollars in committed expenditure. If the pricing is cold, or the stock price quickly falls below the offering price after listing, OpenAI's listing path will be forced to be re-planned — it is not a question of "when to list", but a question of "at what price, in what window, and whether it can still be listed".

There is another easily overlooked constraint in this time window: the midterm elections have just ended. The election results on November 3 changed the political landscape in Washington, and the approval environment for data center construction, AI regulation, and computing power infrastructure may change accordingly. Anthropic's S-1 document was submitted before the election, and the roadshow is conducted after the election, so institutional investors will take these political variables into consideration when pricing. The longer the roadshow lasts, the more fully the variables are digested, but the shorter the window period. This is a dilemma.

Who is Buying, Who is Selling

Before discussing pricing, we need to first clarify the interest structure of this IPO.

The S-1 document shows that Amazon and Alphabet are the two largest external supporters of Anthropic. Amazon previously invested tens of billions of dollars in Anthropic, in exchange for the latter's AWS expenditure commitments of more than 100 billion US dollars within ten years; Google not only invested in Anthropic, but also provides it with TPU computing power support. These two companies are not only shareholders in Anthropic's IPO, but also suppliers, and distribution channels at the same time. This multiple identity can be digested by the growth narrative in the private market, but under the quarterly scrutiny of the public market, every layer of relationship will be unpacked for pricing.

Venture capital investors Spark Capital, Menlo Ventures, Coatue Management, Lightspeed Venture Partners, as well as funds managed by Fidelity and Blackstone, will also obtain considerable book gains from the IPO. However, the realization of these gains depends on the stock price performance after the end of the lock-up period, not the listing price on the first day of the IPO.

A noteworthy detail is: before the IPO, some shareholders have completed partial realization. In April this year, Anthropic facilitated a tender offer, in which shareholders including CEO Dario Amodei, President Daniela Amodei and other executives sold about 46.6 billion US dollars of stocks (another report claims the figure is nearly 50 billion US dollars). Executives cashing out before IPO is not uncommon in Silicon Valley, but in a company with nearly 9 trillion US dollars in committed expenditure and not yet achieving sustainable profitability, this signal will be seriously interpreted by public market investors. It does not necessarily mean that executives lack confidence in the company's prospects, but it does mean that some insiders choose to lock in part of their returns before the public market pricing.

Historical Patterns of First-Day Buying

For ordinary investors, the most direct question is: should they buy on the first day of listing?

Statistics from Jay Ritter, a professor at the University of Florida, provide a reference: among more than 9000 IPO companies between 1975 and 2021, if you buy at the closing price on the first day and hold for three years, 60% of the companies' stock prices remain flat or fall. This pattern does not distinguish between industries or company quality, it reflects the structural feature of the IPO pricing mechanism itself — underwriters tend to create a moderate increase on the first day to reward institutional investors participating in the subscription, and the closing price on the first day often already includes this premium.

Anthropic may, like SpaceX, get an early boost from forced buying by passive index funds. If Anthropic's market cap is large enough, it may be included in the NASDAQ 100 or other major indices shortly after listing, and passive funds will be forced to buy on specific dates, creating short-term demand. But this kind of buying may also come at a cost: SpaceX's stock price once fell by 15% in the first week after joining the NASDAQ 100 index. It is a common pattern of index inclusion that passive buying pushes up the price before the inclusion date and withdraws support after the inclusion date.

For a company with revenue of 332 billion US dollars, narrowing operating loss per quarter but expanding net loss due to changes in the fair value of financial instruments, the price on the first day of IPO is not the end, but the starting point. The real pricing takes place in the first earnings season after listing, when institutional investors have the opportunity to verify every assumption in the prospectus with actual quarterly data.

The True Meaning of the Countdown

Anthropic's IPO countdown is not just the number of days on the calendar. It is an open experiment on the public market pricing of AI assets, and the result of the experiment will determine under what conditions OpenAI, xAI and a group of AI companies waiting to go public will enter the public market in the next twelve months.

November 16 is a possible date, and November 18 is another. Both dates fall before Thanksgiving, and are stuck in the gap between SEC holidays and pricing rules. Underwriters will decide the launch time of the roadshow in the next few days, and executives will answer questions from institutional investors about the 8.954 trillion US dollar commitment, customer concentration, and the dual identities of Amazon and Google during the roadshow. The final price will be determined on the eve of the stock's trading start, and that price will be a comprehensive vote on all the growth and all the commitments of Anthropic in the past five years.

The revenue of 332 billion US dollars is real, the 1206% growth rate is real, and the narrowing of operating loss per quarter is also real. The 8.954 trillion US dollar commitment is real, the 698 billion US dollar short-term bill is real, and the fact that executives cashed out about 46.6 billion US dollars (another report claims nearly 50 billion US dollars) before the IPO is also real. The public market will not deny any set of figures, it only requires that there is a convergence path between these two sets of figures that can be verified by quarterly data.

On November 16, or November 18, Anthropic will enter the public market with these two sets of figures. After the countdown bell rings, the pricing power no longer belongs to underwriters and founders. It belongs to every investor who places an order in the first day's trading, and every fund manager who re-evaluates their positions after the earnings report. And that is the real beginning.

This article is from the WeChat official account "Tech Business", written by Zisen and Haiyi, and authorized for release by 36Kr.