Anthropic Courts Japanese Investors for Up to $3.5 Billion of Its US IPO

Anthropic PBC is targeting up to $3.5 billion from Japanese investors in its US initial public offering, according to a Bloomberg report citing a regulatory filing made Monday. That's a serious slice of the AI startup's landmark share sale, and it's being routed through a market where first-time offerings have fallen to a 14-year low.

The Japanese tranche has a clear structure. Mizuho Securities Co. will manage the local portion of the sale. Goldman Sachs Group Inc., Mitsubishi UFJ Morgan Stanley Securities Co. and Morgan Stanley MUFG Securities Co. are among the firms handling investor orders. Mizuho Financial Group Inc. and Mitsubishi UFJ Financial Group Inc. sit among the deal's underwriters.

The choice of Japan matters. It's one of the few markets whose investors will get direct access to the mega IPO, alongside Australia, Canada and parts of Europe. The Claude chatbot maker filed for its long-awaited IPO last month as companies rush to tap equity markets.

Why $3.5 billion from Japan, specifically?

Japan's IPO market has dried up — the filing itself notes first-time offerings there have hit a 14-year low. For a market starved of new listings, a mega AI deal with direct access is a rare event. Anthropic gets a deep pool of institutional money; Japanese investors get entry into one of the highest-profile AI listings of the cycle without going through secondary channels.

What does this change for practitioners? If you're allocgating from Tokyo, Sydney, Toronto or the eligible European hubs, you can buy in at the offering rather than chasing the stock after it lists. If you're watching underwriter league tables, Mizuho has just landed a lead managing role on one of the year's defining tech deals.

The bigger squeeze: AI's share flood

Anthropic's IPO doesn't land in a vacuum. Two of the biggest names in tech are raising capital at staggering scale:

• Meta Platforms Inc. is seeking as much as $95 billion from selling common and preferred stock.
• Alphabet Inc. is aiming for up to $85 billion in equity financing.
• Anthropic's IPO now tests investor appetite for this wave of new AI-related shares.

Put those numbers side by side and the scale becomes obvious. Meta and Alphabet alone are targeting a combined $180 billion — roughly 51 times what Anthropic wants from Japanese investors. Even a successful Anthropic listing will tell the market little about whether investors can absorb financing demands of that magnitude.

What to watch next

The regulatory filing sets the machinery in motion: Mizuho managing the Japanese books, Goldman Sachs, Mitsubishi UFJ Morgan Stanley Securities and Morgan Stanley MUFG Securities taking orders, and the mega-bank parents underwriting. Investor response in Japan — a market that hasn't seen an IPO wave since 2012's levels — will be an early read on demand. The real test comes after: whether the broader market can digest the AI share flood that Meta's $95 billion and Alphabet's $85 billion raises represent.