Anthropic Files for Nasdaq IPO After Five-Year Sprint to $965 Billion

Anthropic filed publicly for an initial public offering on Monday, October 26, moving the Claude maker toward a Nasdaq listing under the ticker "ANT" that could set the price public markets assign to frontier AI. The share count and price range remain undecided, the company's official announcement said.

The filing follows a confidential submission on June 1. It lands five years after a company founded to make AI safer began raising capital — and just months after private investors valued it at $965 billion.

How did a safety lab become a $965 billion business?

Anthropic, led by siblings Dario and Daniela Amodei, announced a $124 million Series A in May 2021, led by Skype co-founder Jaan Tallinn. Its stated purpose was to develop AI systems people could better understand and control. A $580 million round followed in April 2022, when roughly 40 people worked from a San Francisco office, with the funding earmarked for infrastructure to study increasingly powerful models.

The commercial turn came in March 2023 with Claude's release. Anthropic pitched the assistant as a tool for writing, summarising, answering questions and coding, with early partners including Notion, Quora and DuckDuckGo. In May 2023, it announced a $450 million round led by Spark Capital, with participation from Google and others.

Amazon then committed up to $4 billion in September 2023 and another $4 billion in November 2024. Amazon's statements show the partnership ran beyond financing: AWS supplied infrastructure and distribution and became Anthropic's primary training partner.

The valuation curve steepened fast. Per Anthropic's own announcements:

• $61.5 billion after a $3.5 billion round in March 2025
• $183 billion after raising $13 billion that September
• $380 billion after a $30 billion round in February 2026
• $965 billion after a $65 billion round in May 2026

Those are private fundraising marks, not a settled IPO price. Monday's disclosure gives prospective shareholders their closest look yet at the business underneath them.

What do the financials show?

Revenue reached $16.28 billion in the first half of 2026, up from $1.16 billion a year earlier — a fourteenfold jump. The April-June quarter generated a $974 million operating profit.

The headline net loss is enormous: $80.74 billion for the half. But the filing attributes much of it to non-cash valuation changes tied to convertible financing and other financial instruments. Cash operations tell a different story — operating activities generated $3.92 billion during the period.

The infrastructure bill is the structural number to watch. At the end of June, Anthropic's expected future fixed or minimum-guaranteed purchase commitments stood at about $265.6 billion, spread over one to 20 years, according to the filing.

Product momentum accompanied the money. Claude 3 arrived in March 2024. Claude Code became generally available in May 2025, and September's Claude Sonnet 4.5 release emphasised longer coding tasks and improved reasoning, Anthropic said.

Where does safety fit now?

Anthropic's safety posture still shapes what it sells — and has drawn friction in Washington. In April 2026, it introduced Mythos Preview through Project Glasswing, initially restricting access to selected organisations for cybersecurity work because of the model's capabilities, the filing said.

Those commitments also fed a confrontation with the US government. According to the filing, the administration moved to restrict Anthropic's government business after the company opposed mass domestic surveillance and fully autonomous weapons. Court outcomes were mixed: an August ruling largely favoured Anthropic, but a September appeals-court decision upheld a separate supply-chain risk designation.

Copyright disputes added another cost. The filing confirmed a court approved Anthropic's $1.5 billion settlement with authors in July 2026, while other claims remain contested.

Why the governance matters to buyers

Anthropic is coming to market as a public benefit corporation. Its prospectus said directors must balance shareholders' financial interests against the interests of people affected by the business and its mission of developing AI for humanity's long-term benefit. The Long-Term Benefit Trust generally holds authority to select a majority of directors, and a founders' entity is set to retain majority voting power on matters submitted to shareholders.

That structure makes the IPO a test of more than demand for Claude. Public investors will weigh whether fourteenfold revenue growth can carry roughly $265.6 billion in commitments — and how much say they actually get in a company designed to chase goals beyond profit.