Anthropic plans to raise 552.9 billion yen, equivalent to $3.5 billion, from Japanese investors through its planned US initial public offering (IPO), according to a regulatory filing released on Monday. The disclosure marks one of the largest allocations ever offered to Japanese retail and institutional buyers in a foreign technology listing.

The AI company will channel proceeds from the new shares into working capital, operating expenses and capital expenditure. The filing did not disclose the expected total size of the IPO or Anthropic's proposed valuation, leaving the final structure of the offering open.

What does the filing reveal?

Anthropic submitted its Form S-1 registration statement to the US Securities and Exchange Commission (SEC), the standard document a company files before selling shares to the public. The filing covers investors across several markets beyond Japan, including:

• Australia
• Canada
• Europe
• Switzerland
• The United Kingdom

The company plans to list on the Nasdaq Global Select Market, the exchange's premier tier, under the ticker symbol ANT.

Mizuho Securities will manage the Japanese portion of the offering. Goldman Sachs, Mitsubishi UFJ Morgan Stanley Securities and Morgan Stanley MUFG Securities will also handle investor orders, according to the filing.

Why does the Japanese allocation matter?

The planned sale gives Japanese investors a sizeable allocation at a moment when the country's domestic IPO market has slowed sharply. Reports put local listing activity at a 14-year low, a figure that makes large technology offerings from abroad particularly significant for Japanese investors seeking exposure to growth assets.

The scale of Anthropic's proposal is measurable against the most recent benchmark. Japanese investors secured $2.2 billion during SpaceX's record-breaking $75 billion IPO in June. Anthropic's proposed Japanese allocation of $3.5 billion stands at roughly 1.6 times that amount, although final figures will depend on the terms of the offering once priced.

How valuable could Anthropic become?

Some investors have considered a valuation of about $1.5 trillion for Anthropic. A figure at that level would place the company among the world's most highly valued technology businesses and would rank its listing among the largest public offerings on record.

Anthropic develops Claude, an artificial intelligence chatbot (a software program that converses in natural language) that competes with products from OpenAI and Google DeepMind. Depending on the valuation and the number of shares eventually offered, the listing could become one of the largest AI-related public offerings to date.

What is the strategic logic?

The Japanese share sale forms part of a broader company goal: attracting investors across international markets rather than relying on a single country's allocation. By covering buyers in Australia, Canada, Europe, Switzerland, the UK and Japan, Anthropic spreads its shareholder base across major capital markets before its Nasdaq debut.

The sequencing is deliberate. A 14-year low in Japanese domestic listings, a $3.5 billion target that outstrips the $2.2 billion SpaceX benchmark, and a multi-market S-1 filing together signal a company positioning its IPO as a global event rather than a US-only transaction. Final valuation, share count and pricing remain undisclosed pending the completion of the offering's terms.