More on the Anthropic IPO: our Anthropic IPO storyline page collects our pieces on it.
You probably asked Claude for something at work this week: clean up a spreadsheet, tighten an email, summarize a contract nobody wanted to read. Soon you may be able to own the company behind it. Anthropic is set to list on Nasdaq as ANT around November 19, at $70 to $78 a share, about $1.26 trillion to $1.41 trillion fully diluted.
Everyone knows the hard part. IPO shares are scarce, and on day one the most excited buyers set the price. What fewer people notice: three of the largest stocks in the market already own slices of Anthropic, and you can buy them today at prices set without the frenzy.
Amazon has put about $18 billion into Anthropic since 2023, and its own filing valued that stake at $238.7 billion on September 30. Google owned about 14% in 2025 court documents; after the IPO, the filing puts its stake at about 10% of the fully diluted shares. Microsoft committed up to $5 billion in…