Anthropic has taken a major step toward becoming a publicly traded company, announcing that it has confidentially filed for an initial public offering (IPO) with the U.S. Securities and Exchange Commission (SEC).
The AI company behind the Claude chatbot disclosed in a blog post on Monday that it submitted a draft registration statement for a proposed IPO. Anthropic has not yet revealed the number of shares it plans to offer or the expected price range, noting that the timing and completion of the offering will depend on market conditions and other factors.
The filing comes less than a week after Anthropic secured $65 billion in a Series H funding round that boosted the company’s valuation to approximately $965 billion. The financing round was co-led by Altimeter Capital, Dragoneer, Greenoaks, Sequoia Capital, Capital Group, Coatue, and D1 Capital Partners, attracting significant institutional and strategic investment ahead of the anticipated public listing.
Anthropic’s IPO plans arrive during one of the busiest public offering periods in recent years, with several high-profile technology companies preparing to enter public markets. Among them is SpaceX, which is reportedly targeting a valuation approaching $2 trillion and seeking to raise more than $75 billion through its own public offering.
A confidential filing allows companies to begin the IPO process privately, enabling them to prepare regulatory documents and evaluate market conditions without immediately disclosing sensitive financial information, business risks, or operational details. If Anthropic proceeds with the offering, it will eventually submit a public S-1 registration statement containing detailed information about its finances, ownership structure, legal matters, risk factors, and corporate governance.
The move also comes as competition intensifies across the artificial intelligence industry. Anthropic’s primary rival, OpenAI, continues to attract significant investment and is widely expected to pursue its own IPO in the future. OpenAI most recently raised $122 billion in funding during March at a reported post-money valuation of $852 billion, setting the stage for what could become one of the most closely watched rivalries in public markets.
Founded in 2021 by former OpenAI researchers and executives, Anthropic was initially viewed as a smaller challenger in the rapidly growing large language model market. However, the company has since evolved into one of the most influential AI firms globally, securing major enterprise customers and expanding its presence across multiple industries.
Anthropic’s focus on enterprise AI solutions has fueled remarkable financial growth. The company recently disclosed that its annualized revenue run rate surpassed $47 billion, a dramatic increase from approximately $9 billion reported at the end of 2025.
That growth could accelerate further as Anthropic expands access to its advanced AI systems. The company introduced its Mythos model earlier this year but has maintained limited availability due to cybersecurity concerns. Anthropic previously stated that the model identified thousands of high-severity software vulnerabilities, requiring extensive review and mitigation efforts before broader deployment.
According to a Bloomberg report published Monday, Anthropic is also preparing to provide access to Mythos for the European Union’s cybersecurity agency. The report, citing anonymous sources, suggested the move could play a role in evaluating advanced AI systems and strengthening cybersecurity capabilities.
With strong revenue growth, growing enterprise adoption, and increasing investor interest in artificial intelligence, Anthropic’s confidential IPO filing marks another significant milestone in the company’s rise from startup challenger to one of the world’s most valuable AI firms.
