Anthropic's IPO is said to have attracted about six times oversubscription.

People familiar with the matter said Anthropic PBC's initial public offering has drawn subscriptions for about six times the shares available for purchase, with investors increasingly interested in what could become the largest stock offering in history. Filings submitted by the company show that the Claude AI model developer and its co-founders plan to raise up to $64.4 billion through the IPO and $26 billion through a private placement. Combined, the IPO would exceed SpaceX's IPO to become the largest listing ever. The people familiar with the matter said bankers told potential investors that Anthropic will prioritize existing backers, and some potential buyers will be allocated fewer shares than they expected. The people said IPO details, including demand for the shares, may change.