Anthropic Files for IPO With $16.3B in H1 Revenue, Complex Governance Structure

Anthropic formally filed for an initial public offering on Monday, setting the stage for one of the most closely watched tech debuts in recent U.S. history. The company plans to list under the ticker "ANT," according to its S-1 filing with the Securities and Exchange Commission.

The filing reveals rapid revenue growth alongside deep losses. Anthropic recorded revenue of $16.3 billion for the first half of 2026, up from $1.2 billion in the same period last year. That growth came with an operating loss of $693 million, an improvement from the $2.1 billion operating loss recorded in the first half of 2025. The company's net loss hit $80.7 billion, largely driven by noncash accounting adjustments tied to convertible debt. Anthropic said it "may not achieve or sustain profitability in the future."

Governance: Founders and Trust Hold the Reins

Anthropic's filing details a governance structure that gives its seven co-founders and a special trust control over the company, leaving ordinary shareholders with limited influence over major decisions including board composition.

The co-founders — Dario Amodei, Daniela Amodei, Tom Brown, Jack Clark, Jared Kaplan, Sam McCandlish, and Christopher Olah — will make up the "Founder LLC," which will collectively control 50.1% of shareholder voting power. This allows them to elect three members of the board of directors. If the founders cannot reach a majority among themselves, their shares are voted in proportion with holders of common stock.

A separate Long-Term Benefit Trust, established in 2023, owns a class of stock giving it the ability to elect and remove a majority of the company's board through Class T directors. The trust is chaired by Neil Shah, a global health expert and former managing director at GiveWell, and includes former Federal Reserve chair Ben Bernanke, national security expert Richard Fontaine, and Harvard physicist Christopher Stubbs. There is one vacancy on the trust, which existing members will fill themselves.

Anthropic is also a public benefit corporation, legally allowed to weigh a public mission alongside profit. The company says this status protects the board's ability to make AI safety decisions not driven entirely by shareholder value.

The board is currently chaired by president Daniela Amodei and includes CEO Dario Amodei, Netflix cofounder Reed Hastings, former Microsoft and GM CFO Christopher Liddell, Novartis CEO Vas Narasimhan, and Spark Capital partner Yasmin Razavi. There is one vacancy on the board.

The structure also includes a check on the trust: when the trust nominates a "Specified" director or removes one without cause, the board's nominating committee can decline to approve the move and throw the decision to employees for a vote.

The founders' control will not last indefinitely. Ten years after the IPO, the founders can choose to end their control, or it ends automatically when fewer than three of them remain. The trust will continue until 85% of common shareholders vote to end it, or it steps down with board approval.

Experts quoted by The Verge said the structure is unusual for a major technology company. University of Pennsylvania law professor Elizabeth Pollman described it as a "unique and complicated governance structure that has not been used before" that was "creatively designed for this founder-led and mission-driven company." Jens Dammann, a professor at the University of Texas School of Law, said the arrangements give the founders and the trust "tremendous power" over the company's direction.

Ann Lipton, a professor at the University of Colorado Law School, told The Verge that "Anthropic is entirely insulated from profit seeking pressures, in the sense that ordinary shareholders have no ability to select the board or make business decisions." She cautioned that founders' financial stakes could influence their decisions, adding: "Investors may not mind their lack of voice as long as things go well. But if things go sour, they may become quite frustrated."

Enterprise Growth and Customer Stickiness

The filing shows Anthropic's enterprise business scaling rapidly. As of September 30, the company had more than 11,900 customers spending at least $100,000 annually, more than 1,900 customers spending upward of $1 million, and about 250 customers spending $10 million or more.

More than half of customers spending at least $100,000 annually now use both the Claude platform and a first-party app like Claude Code or Cowork, up from about 30% at the end of last year. Net revenue retention stood at about 900% as of the end of the third quarter.

"The speed and depth of our enterprise customer adoption are powerful evidence of Claude's position at the frontier of AI," the S-1 reads.

In the third quarter, the highest-spending 5% of Claude Enterprise customers who used Claude Code spent about 20 times as much per month as the average enterprise user who didn't use the coding tool, per the filing.

Anthropic positions Claude as not a "static product that serves a single use case," but rather "frontier AI with rapidly advancing capabilities" spanning models, the developer platform, and applications. "An advance at any layer compounds across all three layers, accelerating the pace at which we can deliver more capable intelligence," the filing reads.

The company also flagged risks tied to its cloud partnerships with AWS, Google Cloud, and Microsoft Azure. Anthropic said those providers may increasingly see it as a competitor and could prioritize their own requirements or rivals they've invested in, potentially making it harder to secure compute. Customer concentration is another risk, with the filing stating that "any adverse change in demand from our largest customers … could adversely affect our business and prospects."

Risk Factors: From Sentience to Existential Threats

Anthropic's S-1 includes an extensive risk factors section — roughly 93 pages and over 70,000 words — covering hundreds of potential problems. Among the most notable: the company warns its technology could "pose catastrophic or existential risks to humanity."

The specific concern is not in current models but near-future systems that could "substantially automate AI research and development." If allowed to "operate with a high degree of autonomy," such systems could "accelerate AI progress beyond our ability to evaluate and safeguard new model," Anthropic warns.

The filing also addresses the possibility that models "possess or could develop forms of sentience or moral status." Anthropic notes this could lead to "regulatory requirements, public pressure, or advocacy efforts" that constrain operations, or the company could "elect to adopt policies, safeguards or limitations … that go beyond existing legal requirements."

The company also discusses the possibility that its models could display "unexpected strategic or self-preserving behaviors," including "outputs that could be interpreted as coercive, deceptive, or manipulative, including behavior resembling blackmail." Anthropic notes such perceptions "could generate significant public concern, regulatory scrutiny, litigation risk, or reputational harm."

The company writes: "We encourage you, as a prospective owner of our stock, not to think of your purchase in purely transactional terms. We hope you will see it instead as an opportunity to be part of something greater. The advent of machine intelligence is one of the seminal moments in human history."

Anthropic has not yet disclosed how much it hopes to raise or its proposed share price.