Anthropic to Tap Japanese Investors for Up to $3.5 Billion in U.S. IPO

Anthropic, the American artificial intelligence laboratory behind the popular chatbot Claude, is set to raise up to $3.5 billion from Japanese investors as part of its upcoming initial public offering (IPO) in the United States. According to a regulatory document filed on November 2, 2026, the company plans to offer shares worth up to 552.9 billion yen to these investors.

Strategic Financial Expansion

This capital raise is designed to strengthen Anthropic’s financial resources. The proceeds from the new share issuance will be allocated to:

Covering working capital needs
Funding current operational expenses
Financing strategic investments, particularly those required for business development

Notably, the document does not specify the total amount Anthropic aims to raise during its IPO or its final valuation. While some investors have cited a valuation of approximately $1.5 trillion, this figure remains unconfirmed and does not represent an officially finalized estimate for the transaction.

International Investor Strategy

The inclusion of the Japanese market is part of a broader strategy to open Anthropic’s IPO to international investors. According to reports by Reuters, the Japanese portion of the offering could reach $3.5 billion.

Lead Underwriter: Mizuho Securities is set to lead this segment of the operation.
Order Reception: Several financial institutions, including Goldman Sachs and subsidiaries of Mitsubishi UFJ Morgan Stanley, will assist in receiving orders.

Japanese investors have already demonstrated strong interest in high-profile tech IPOs. For instance, during SpaceX’s IPO in June of this year, Japanese investors secured $2.2 billion worth of shares out of the $75 billion raised by the aerospace company.

Context: AI Market Expansion and Capital Needs

For Anthropic, this IPO comes at a time of rapid expansion in the AI market, coupled with significant financial demands. Developing increasingly powerful AI models requires substantial investments in:

Computing infrastructure
Computational capacity

Consequently, the stakes of this IPO extend beyond simply opening the company’s capital to the public. It aims to enable Anthropic to mobilize new resources from financial markets to support its growth and fund its AI ambitions, while also subjecting its business model to the scrutiny and valuation of public investors.