What We Learned From Anthropic's Updated IPO Filing

TradingKey - Anthropic is entering the final stages of preparation for its initial public offering (IPO). As the company updated its prospectus filed with the U.S. Securities and Exchange Commission (SEC), key information such as the offering price range, share count, strategic investor subscription arrangements, and retail participation mechanisms has been further clarified.

The latest plan indicates that the Claude developer plans to issue approximately 801.3 million new shares at $70 to $78 per share, with an additional approximately 23.6 million shares to be sold by existing shareholders. If the final offering price hits the upper limit of the range, Anthropic will raise approximately $62.5 billion through the public offering; if the underwriters' over-allotment option and a $26 billion private placement involving tech giants are included, the total fundraising scale will expand even further.

Based on the post-offering share count, Anthropic's market capitalization at the top end of the pricing range would exceed $1 trillion; if potential shares such as employee stock options and restricted stock are taken into account, its fully diluted valuation could reach approximately $1.4 trillion.

Against the backdrop of a correction in artificial intelligence-related stocks and investors reassessing returns on data center capital expenditures, this IPO will not only test market confidence in Anthropic's growth prospects, but may also serve as an important window for observing valuation shifts across the AI industry.

Anthropic IPO Valuation Could Top $1 Trillion

Anthropic plans to publicly offer 825 million shares of Class A common stock in this offering, with approximately 801.35 million shares issued by the company and approximately 23.65 million shares sold by existing shareholders. Based on the price range of $70 to $78 per share, the total public offering size is approximately $57.75 billion to $64.35 billion, but the new share financing attributable to Anthropic will be up to approximately $62.5 billion, as proceeds from the sale of existing shares will not go to the company.

The underwriters also hold an option to purchase an additional 123.75 million shares. If market demand is strong and the overallotment option is fully exercised, the funds Anthropic is able to raise will increase further.

According to the prospectus, upon completion of the IPO and including the concurrent private placement, the company expects to have a total of approximately 13.087 billion economically entitled Class A and Class N shares outstanding. Based on the upper limit of the offering price of $78 per share, this corresponds to an undiluted market capitalization of approximately $1.02 trillion.

Anthropic has also arranged a $26 billion private placement to close concurrently with the IPO. Google and Nvidia have each committed $10 billion, AMD is subscribing for $2.5 billion, Broadcom, Micron Technology, and Microsoft are each investing $1 billion, and a TSMC-affiliated entity is subscribing for $500 million. These investors are purchasing Class N shares with no regular voting rights, priced in line with the IPO offering price.

Based on the midpoint of the offering range of $74 per share, Anthropic expects to receive approximately $84.6 billion in net proceeds from the public offering and the private placement; if the underwriters fully exercise their overallotment option, net financing could rise to approximately $93.7 billion. The proceeds will be used primarily for computing power and data center infrastructure, day-to-day operations, talent recruitment, and potential acquisitions, with approximately $3.8 billion to be used to cover taxes arising from the settlement of restricted stock.

Revenue Grows Over 12-Fold in a Year, but $104 Billion Net Loss Needs a Closer Look

The most striking aspect of Anthropic's prospectus is the explosive growth in the company's revenue over a short period.

Anthropic's annual revenue rose from $41 million in 2023 to $386 million in 2024, and further expanded to $4.585 billion in 2025. In the first nine months of 2026, the company generated revenue of $33.242 billion, far exceeding the $2.545 billion recorded in the same period of the prior year, up approximately 1,206% year-over-year. In the third quarter of 2026 alone, Anthropic's revenue reached $16.956 billion, representing a year-over-year increase of 1,127%.

As of October 31, 2026, the company's annualized revenue run rate was approximately $81 billion, an increase of $10 billion from the end of September. This indicates that Claude's commercialization continues to expand rapidly; however, the annualized revenue run rate is merely a metric extrapolated from recent business activity and cannot be directly equated with the company's recognized annual revenue. Anthropic also cautioned in its prospectus that rapid adoption by early customers, seasonal variations, and the cleanup of anomalous accounts could all cause significant volatility in this metric.

From an operational perspective, the company's losses have narrowed significantly. In the first nine months of 2026, Anthropic's operating loss fell from $5.224 billion in the prior-year period to $1.260 billion; after excluding stock-based compensation, non-cash donations, and other adjustments, adjusted operating profit reached $4.081 billion, yielding an adjusted operating margin of 12%. Over the same period, operating activities generated $6.569 billion in cash flow, compared with a net cash outflow of $2.024 billion in the same period of the prior year.

The prospectus reports a net loss of $104.039 billion for the first nine months, but this figure cannot be directly interpreted as the company burning an equivalent amount of cash. Approximately $94.324 billion of that stemmed from fair value changes in convertible notes, derivative liabilities, and simple agreements for future equity. As Anthropic's valuation increased, these instruments generated higher liabilities for accounting purposes, resulting in massive non-cash losses.

Such items may decrease significantly following the conversion of IPO-related securities. Therefore, when evaluating Anthropic's current operational quality, operating profit, adjusted operating profit, and operating cash flow offer far more relevant insight than viewing the GAAP net loss in isolation. However, the company still has $24.1 billion in unrecognized restricted stock compensation that is expected to be expensed over approximately the next two years, meaning the impact of equity-based compensation on earnings and share dilution cannot be overlooked.

Claude Enterprise Customers Expand Rapidly as Revenue Concentration Risk Persists

Anthropic currently monetizes primarily through a usage-based pricing model, with customers paying based on the number of tokens processed by Claude, while the company also offers subscription products such as Claude Pro and Max. Claude Code, Claude Cowork, and its enterprise-facing API platform have become significant sources of revenue growth.

As of the end of September 2026, more than 11,900 customers contributed at least $100,000 in revenue to Anthropic over the past 12 months, up from just over 950 a year earlier. More than 1,900 customers contributed over $1 million in annual revenue, and approximately 250 customers reached $10 million. The company disclosed a net revenue retention rate of approximately 900%, indicating that existing customers have been exceptionally aggressive in ramping up Claude usage.

However, this figure should be interpreted with caution. In calculating its net revenue retention rate, Anthropic excludes individual subscribers on fixed-price plans such as Claude Pro, Max, and Ultra, and the relevant operating metrics are derived from internal systems that have not been independently verified by a third party. The 900% retention rate primarily reflects the expansion pace of early-stage AI market customers transitioning from trial runs to large-scale deployment, and it may not be sustainable over the long term.

Customer concentration is also noteworthy. In the first nine months of 2026, no single customer contributed more than 10% of revenue, but the top five customers still accounted for approximately 25% in aggregate. Meanwhile, 44% of revenue was generated through cloud provider marketplaces, and 52% of accounts receivable were also tied to these channels. This means that AWS, Google Cloud, and Azure serve not only as key computing power providers for Anthropic, but also as sales channels, partners, and even shareholders. These complex, overlapping relationships could affect computing power pricing, revenue sharing, and the company's bargaining power.

The prospectus also disclosed for the first time an easily overlooked figure: Anthropic estimates that approximately 5% to 7% of its revenue in the first nine months of 2026 came from customers who were later determined to have violated the company's usage policies or commercial terms. As account identification and enforcement measures strengthen, this portion of revenue may not recur, posing a drag on subsequent growth rates.

Over $900 Billion in Computing Power Commitments Is Foundation for Growth and Biggest Risk

As of the end of September 2026, Anthropic's contractual obligations, short-term commitments, subsequently signed agreements, and uncommenced leases listed in its prospectus totaled approximately $900.9 billion, the vast majority of which were related to computing power and data centers. In addition, there were arrangements without specified fixed amounts, with the company estimating that related expenditures could reach $150 billion to $175 billion.

This means Anthropic's potential future infrastructure payments could exceed $1 trillion. Although approximately $186.2 billion of this involves termination rights or requires partners to first satisfy financing, construction, and regulatory conditions—meaning not all amounts will be paid unconditionally—contractual obligations expected to come due over the next 12 months still reach approximately $70.7 billion.

From a positive perspective, locking in chips, power, and data centers in advance ensures that Claude has sufficient resources to train new models and meet customer demand. Anthropic is already able to simultaneously utilize AWS Trainium, Google TPU, Nvidia GPUs, and AMD GPUs, helping reduce its reliance on any single chip platform.

The issue is that these contracts typically require capital outlays before the associated computing power generates revenue. If AI demand slows, model competitiveness weakens, or compute utilization falls short of expectations, fixed expenses could rapidly erode profit margins. In the third quarter of 2026, the company again recorded an operating loss of $567 million due to the use of higher-cost short-term computing power and the recognition of non-cash donation expenses. Its adjusted operating margin also fell from 19% in the second quarter to 15%, showing that profits remain highly sensitive to compute procurement prices.

Founder Holds 50.1% Voting Rights, Limiting Common Shareholders' Influence

Anthropic's post-IPO governance structure differs markedly from that of traditional technology companies.

The company will remain a Delaware public benefit corporation, and its board of directors must consider not only the economic interests of shareholders, but also stakeholders affected by its conduct, as well as the public benefit purpose of "responsibly developing and maintaining advanced AI."

Prior to the IPO, Anthropic will issue one share of Class F stock to Founder LLC, an entity formed by seven co-founders. Although this share carries no economic rights, it holds 50.1% of the company's overall voting power, allowing it to influence the election of ordinary directors and other significant matters requiring shareholder approval.

Meanwhile, the Long-Term Benefit Trust will elect and remove Class T directors through one share of Class T stock, and these directors will occupy a majority of the board's authorized seats. Although Class A shares purchased by public market investors carry one vote per share, Anthropic will still be deemed a "controlled company" by Nasdaq, making it difficult for common shareholders to alter the company's strategic direction or governance arrangements through voting.

New shareholders also face substantial book-value dilution. Based on the midpoint offering price of $74, the estimated net tangible book value per share following the completion of the IPO and private placement will be only $8.21, resulting in immediate dilution of $65.79 per share for new investors. The weighted average cost of shares for existing shareholders is approximately $11.50, which is also significantly lower than the price paid by IPO investors.

In addition, approximately 3.6 billion shares subject to lock-up agreements may become eligible for sale in phases before the standard 180-day lock-up period expires. As more restricted stock, options, and employee stock ownership plan shares enter the market, the potential supply pressure on ANT stock following its listing will also warrant ongoing monitoring.