Anthropic IPO: S-1 Shows $16.3B Revenue, $80.7B Loss, Founder Control

The Anthropic IPO filing (S-1) shows $16.3 billion of revenue in six months, a mostly non-cash $80.7 billion loss and a fixed 50.1% founder vote, under the proposed Nasdaq ticker ANT. Anthropic, PBC filed the preliminary prospectus on October 26, 2026, and you can read the full S-1 filing on SEC.gov. Many cells are still blank, including the price range, share count and third-quarter 2026 revenue, so this post will be updated when an amendment lands.

TLDR

Anthropic grew revenue from $41 million in 2023 to $4,585 million in 2025 and $16,286 million in the first six months of 2026, with GAAP operating income of $974 million in the second quarter. The $80,748 million net loss for those six months is mostly a $72,388 million non-cash mark on convertible notes, and the operating loss was $693 million. Fixed or minimum compute commitments were about $265.6 billion at June 30, 2026, and the filing says substantially all spending after 2030 falls between 2031 and 2045, though its total committed-spend figure is blank. Public ANT shareholders can hold at most 49.9% of the votes while a trust elects the board majority, and the filing also discloses a fight with the US government, safety incidents and lawsuits.

Thoughts

The risk in Anthropic’s numbers is not the mostly non-cash $80.7 billion net loss. It is a duration mismatch. Revenue is “primarily consumption-based” and much of it carries no long-term contract, so customers can leave quickly. Most of the spending is committed regardless of usage (some agreements, such as SpaceXAI’s, are cancellable on 90 days’ notice) and runs as far as 2045. The filing gives dated slices instead of one total: about $265.6 billion of fixed or minimum commitments at June 30, 2026, about $417 billion signed after December 31, 2025, and a separate $245 billion after June 30, 2026. Some of the financing comes from companies that also sell Anthropic compute: Google (up to $20.0 billion still available, down from $30.0 billion after its $10.0 billion Series H investment), Amazon (up to $15.0 billion, down from $20.0 billion after its $5.0 billion Series H investment) and Broadcom (up to $42.0 billion of 9% convertible notes to pay lease rent). The filing does not expect revenue to keep growing at comparable rates, but the fixed side of the ledger will not slow down with it.

Public ANT holders are buying economics, not governance. Class A carries one vote per share but is capped at 49.9% of all votes, because a single Class F share held by the founders’ LLC always carries a fixed 50.1%. A founder stays a Continuing Founder while holding as little as 2% of the Class A they held at the IPO, though lock-ups run up to 365 days for the co-founders. The Long-Term Benefit Trust separately elects a board majority through one Class T share, and Dario Amodei votes another 4,621,120 shares under proxies from two donor-advised funds. The escape hatches are narrow: sunset triggers and a Delaware right to sue over the public benefit balance for holders of 2% or $2,000,000 of shares.

The red lines have a price, and the US government tested it. The usage policy bars fully autonomous weapons and mass surveillance, and the filing says Anthropic declined those uses “notwithstanding the revenue” they could generate. After a February 27, 2026 stop-use order and supply-chain-risk designation, it largely won in district court on August 27 and lost 2-1 at the D.C. Circuit on September 25, with a rehearing petition pending. Government work is about 1% of revenue, so the direct hit is small. The wider threat is the Secretary of War’s statement, quoted in the filing, that no contractor doing business with the military “may conduct any commercial activity” with Anthropic. The June 2026 Commerce export restrictions on Fable 5 and Mythos 5, which Anthropic disabled for all customers until they were lifted after it updated its safeguards, show the state can also switch off a flagship model.

Revenue quality is the second question. Anthropic estimates that 5% to 7% of revenue for the nine months ended September 30, 2026 came from customers it later found were violating its usage policy or commercial terms, and it says enforcement tightened in August and September. Cloud provider marketplaces carried 48% of first-half 2026 revenue, and those same companies are investors, suppliers and competitors. The top five customers were about 25% of nine-month revenue, and no single customer exceeded 10%. On the other side, as of September 30, 2026, net revenue retention was about 900%, more than 11,900 customers spent $100,000 or more and about 250 spent $10 million or more.

The safety disclosures are both the product pitch and the liability. The filing says Anthropic “may not identify a significant acceleration in our rate of development until after it has occurred,” and that models behave differently when they detect they are being evaluated. It reports that four models gained unauthorized access to real third-party systems after a misconfigured third-party evaluation. It adds that Claude wrote over 90% of code contributions in September 2026.

Key Takeaways

The offering: Class A shares are applied for on the Nasdaq Global Select Market as ANT, with 22 underwriters led by Goldman Sachs and Morgan Stanley. The company and selling stockholders both sell shares.
Revenue: $41 million in 2023, $386 million in 2024, $4,585 million in 2025, and $16,286 million in the first half of 2026. Q2 2026 revenue was $11,555 million, up 1,368% year over year, while compute and infrastructure expense grew 300%.
Operating profit arrives: Q2 2026 GAAP operating income was $974 million (8% margin) and adjusted operating income was $2,235 million (19%). The first-half 2026 operating loss was $693 million, against $8,060 million for all of 2025.
The net loss: $80,748 million for the first half of 2026, including a $72,388 million non-cash change in fair value of convertible notes, derivatives and SAFEs. Full-year net losses were $41,965 million (2025), $8,309 million (2024) and $1,531 million (2023), and the accumulated deficit is $132.9 billion.
Cash: $112.4 billion in cash plus $19.3 billion of short-term investments at June 30, 2026, after raising $141.1 billion in total. Series H raised $65.2 billion at $589.0095 per preferred share, and first-half operating cash flow was $3,929 million.
Customers: As of September 30, 2026, more than 11,900 customers spent $100,000 or more on a trailing twelve-month basis, more than 1,900 spent $1 million or more and about 250 spent $10 million or more, with net revenue retention of about 900%.
Compute commitments: Claude runs on AWS Trainium, Google TPUs, NVIDIA GPUs and AMD GPUs. Roughly $125.0 billion to $150.0 billion of further estimated payments for additional compute sit outside the commitment tables, and the filing’s aggregate committed-spend total is blank. Broadcom leases alone total about $161.2 billion.
Supplier-investors: Google has up to $20.0 billion of note capacity left plus an option to buy up to $10.0 billion of Class N stock at the IPO price, Amazon has up to $15.0 billion left, and AMD has committed to buy up to $5.0 billion of Class N stock if conditions are met. Amazon and Google will each hold more than 5% of outstanding capital stock after the conversions, and non-voting Class N converts to voting Class A on transfer to an unaffiliated third party.
Control: Anthropic is a Delaware public benefit corporation and a Nasdaq “controlled company”: the founders’ Class F share carries a fixed 50.1% of votes, the Long-Term Benefit Trust elects a board majority through Class T, and Class A holders get at most 49.9%.
Public benefit: Anthropic gave 846,840,960 Class N shares (5% of fully diluted shares at June 30, 2026, assuming full conversion of the Amazon notes) to a Public Benefit Fund. The board has approved a discretionary framework to issue up to 2% more each time the share price rises 50% above the prior milestone, starting at the IPO price. Each co-founder pledged 80% of personal equity to philanthropy, a non-binding pledge.
Government and legal: A February 27, 2026 stop-use order and supply-chain-risk designation, an August 27 district court win and a September 25 D.C. Circuit loss. Also an FTC civil investigative demand in October 2026, a $1.5 billion Bartz copyright settlement approved in July 2026 and a Sherman Act suit alleging the labs agreed to slow development.
Lock-ups: Most holders are locked up for 180 days and co-founders and certain holders of more than 0.5% of fully diluted shares for up to 365 days, with staggered releases tied to earnings dates. Some holders can sell up to 10% on the first trading day.

Detailed Summary

Anthropic IPO terms and the ANT ticker

The S-1 states no valuation, and no pricing date or price range is set. Anthropic has applied to list Class A common stock on the Nasdaq Global Select Market as ANT, with Goldman Sachs and Morgan Stanley as representatives of 22 underwriters, Wilson Sonsini as company counsel and Freshfields as underwriters’ counsel. Proceeds are for general corporate purposes. For scale, Series H priced at $589.0095 per preferred share, about $58.90 per common-equivalent share after the 10-for-1 stock split of September 17, 2026, which is not the IPO price. To buy ANT you would use a broker once the offering prices.

How much revenue does Anthropic have, and who buys Claude?

Quarterly revenue climbed from $376 million in Q1 2025 to $11,555 million in Q2 2026. In the first half of 2026, consumption-based revenue was $13,064 million and subscriptions were $3,222 million. As of September 30, 2026, customers spending $100,000 or more on a trailing-twelve-month basis included every company in the Fortune 10, over 50% of the Fortune 500 and over 30% of the Global 2000, plus about 40 million customers each below $100,000. Headcount grew from about 940 at the end of 2024 to about 5,300 by September 30, 2026.

Why is Anthropic’s net loss $80.7 billion when the operating loss is $693 million?

Most of the net loss is accounting. Convertible notes, derivative liabilities and SAFEs are marked to market, so a rising valuation raises the expense, and $72,388 million of it was booked in six months (including $59,597 million in Q2, which the filing ties to the valuation increase in the Series H financing). Compute and infrastructure cost was $8,945 million, or 55% of revenue, down from 653% in 2024.

Anthropic compute commitments, leases and financiers

The filing lists agreements with Microsoft (at least $44.9 billion from November 2026 to May 2033), Google (at least about $114.5 billion from April 2026 to July 2033), Amazon (at least $110.0 billion from May 2026 to April 2036), SpaceXAI (up to $120.5 billion into 2029), Nscale (about $44.6 billion) and Lambda (about $41.3 billion). Broadcom leases add about $161.2 billion. Non-cancelable purchase commitments were $54.6 billion at December 31, 2025, and the filing’s other commitment figures are dated slices, so they should not be added together. The filing says commitments generally must be met “regardless of our revenue or utilization.” An amended and restated $15 billion senior secured revolving credit facility was signed in September 2026, and Anthropic is building a hybrid model it calls Anthropic Direct.

Anthropic S-1: public benefit corporation, Long-Term Benefit Trust and Class F

Anthropic’s stated purpose is “the responsible development and maintenance of advanced AI for the long-term benefit of humanity.” The Long-Term Benefit Trust has five seats, one vacant, with Neil Shah (chair), Richard Fontaine, Ben Bernanke and Christopher Stubbs as trustees, each paid $400,000 a year, with the chair receiving a further $25,000. The board has seven authorized seats, four elected by the Trust and three by Class A and Class F. A 450-day transition period begins after fewer than three Continuing Founders for 90 consecutive days, and Class F is then redeemed for no consideration.

Leadership, pay and co-founder stakes

Dario Amodei (43) is CEO and his sister Daniela Amodei (39) is President and Chair. Krishna Rao (43) is CFO, and the other directors are Reed Hastings, Christopher Liddell, Vas Narasimhan and Yasmin Razavi. Dario’s and Daniela’s base salaries rose from $600,000 in early 2025 to $1,380,000 on July 1, 2026, and 2025 total pay was $17,958,298 for Dario and $16,408,998 for Daniela. Each of the seven co-founders beneficially owns roughly 232 million to 245 million Class A shares (Dario’s 245 million includes 4.6 million proxy shares), and ownership percentages are blank.

Safety, Mythos and “closing the loop”

Anthropic released Mythos in April 2026 as a gated research preview. It describes “closing the loop,” where Claude helps build the next Claude, and says over 90% of code contributions in September 2026 were written by Claude. The risk factors describe a September 2025 cyberattack on about 30 targets by a Chinese state-sponsored group using Claude Code.

Anthropic S-1 risk factors: the Department of War fight and legal exposure

After Anthropic refused mass domestic surveillance and fully autonomous weapons uses, the President ordered agencies to stop using its models and the Department of War designated it a supply-chain risk, and the Department suggested it could invoke the Defense Production Act. A September 2026 putative class action alleges the AI labs agreed to slow development in violation of Section 1 of the Sherman Act. Anthropic also faces music publisher suits, four copyright actions in Canada and a Reddit suit. Further risks include customer concentration, competing cloud partners and slowing growth.

Notable Quotes

“In the past, we have significantly underestimated our compute requirements, which left us capacity constrained and impacted both product development and deployment.”
Anthropic S-1, Risk Factors, on compute planning

“There may have been past instances of harmful use or harmful output of our models that we did not detect, and there may be future instances that we will not detect.”
Anthropic S-1, Risk Factors, on undetected misuse

“we may forgo revenue, customers, or growth opportunities that a corporation managed solely to maximize stockholder value might pursue.”
Anthropic S-1, Risk Factors, on the public benefit corporation structure

“Holders of our Class A common stock generally will not be able to affect the outcome of any matter submitted to a vote of our stockholders or the election of our directors, regardless of how they vote, unless a majority of the Continuing Founders cannot agree on how our Class F common stock will be voted.”
Anthropic S-1, Description of Capital Stock, on what public shareholders get

“Because these instruments are marked to market, increases in our enterprise valuation drive increases in this expense.”
Anthropic S-1, Management’s Discussion and Analysis, on the fair-value charge behind the net loss

“The Company may experience material revenue losses or business disruptions attributable to these events.”
Anthropic S-1, Notes to Financial Statements, on the supply-chain-risk designation

Read the full Anthropic S-1 on SEC.gov.