Anthropic confidentially submitted a draft Form S-1 registration statement to the Securities and Exchange Commission on June 1, 2026, for a proposed initial public offering of common stock. The filing follows the company's $65 billion Series H funding round in May 2026, which valued Anthropic at $965 billion post-money, making it more valuable than OpenAI's $852 billion valuation from March 2026.
Confidential Filing Keeps Financial Details Private
The confidential filing process allows Anthropic to prepare for a public debut while keeping detailed financial information under wraps during the SEC review period. The company stated the action "gives us the option to go public after the SEC completes its review." No share count or pricing information has been set, and the actual IPO remains contingent on market conditions and other factors.
The announcement was published under Rule 135 of the Securities Act of 1933, which permits companies to announce proposed public offerings before formal registration. The filing emphasized that any offers or sales of securities will be made only in accordance with the registration requirements of the Securities Act.
$965B Valuation Eclipses OpenAI
Anthropic's Series H funding round was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. The $965 billion post-money valuation represents a significant premium over OpenAI's most recent valuation, positioning Anthropic as the most valuable AI company if it goes public at or near this figure.
An IPO would provide the first concrete look at Anthropic's financial data, including revenue, expenses, and customer metrics, amid growing concerns about an AI bubble in the technology sector. The company has not disclosed detailed financial information publicly to date.
Key Takeaways
- Anthropic filed confidential S-1 registration statement with SEC on June 1, 2026, for proposed IPO
- Company raised $65 billion in Series H at $965 billion post-money valuation in May 2026
- $965B valuation exceeds OpenAI's $852 billion valuation from March 2026
- No share count or pricing information has been set; IPO contingent on market conditions
- IPO would provide first public disclosure of Anthropic's financial data