The Claude maker's S-1 filing shows Alphabet can swap part of an undrawn $20 billion debt facility for non-voting equity at the IPO price
Anthropic has granted Alphabet the option to buy up to $10 billion of its Class N common stock. The disclosure appears in the AI startup’s Form S-1, filed with the SEC on October 26, 2026.
That filing is the paperwork companies submit before going public. Anthropic’s offering is potentially slated for November.
How the Class N option works
Under the arrangement, Alphabet can purchase the shares at the IPO offering price through a private placement. A private placement means the stock is sold directly to a buyer rather than through the public order book.
The catch sits in the share class itself. According to the filing, Class N shares carry no voting rights until they are sold to unaffiliated parties.
Put simply, Google can own a large economic slice of Anthropic without getting a say in how the company is run. If Alphabet later sells those shares to someone outside its corporate family, the votes switch on for the new owner.
The $30 billion backdrop
The option does not appear out of nowhere. It is tied to a broader $30 billion deal between Anthropic and Alphabet established in March 2026.
Part of that package was a $20 billion note purchase agreement. That facility runs through December 31, 2030. As of June 30, 2026, Anthropic had drawn nothing from it.
Any amount Alphabet uses to buy Class N stock would proportionately shrink the undrawn $20 billion debt facility. If Google exercises the full $10 billion option, the remaining note capacity would drop by the same amount. The total commitment does not grow. It changes shape, moving from potential loans toward potential equity.
Who owns what after the listing
Google is not the only tech giant with a large stake. The S-1 indicates that both Amazon and Alphabet are expected to hold more than 5% of Anthropic’s capital stock after the IPO.
Both companies face ownership caps. Amazon’s is set at 14.99%, while Alphabet’s sits at 12%.
The research summary describing the filing characterizes the Class N structure as a way to attract substantial capital while keeping control within the founding team.
What this means
If Alphabet exercises the option, a sizable block of demand would exist at the offering price before the first public trade.
Still, an option is not an obligation. The filing gives Alphabet the right to buy up to $10 billion, not a requirement to do so.
Anthropic’s setup has two of the world’s largest technology companies expected to sit on its cap table, each with a capped stake and, in Alphabet’s case, a flexible pipeline of either debt or equity.
Whatever portion of the note facility survives the IPO remains available through the end of 2030, giving Anthropic a financing cushion that extends well past its first years as a public company.
