Anthropic founders pledge 80% of stock, worth up to $80 billion

Anthropic's seven cofounders have pledged to donate 80% of their personal stakes in the AI company, a commitment potentially worth nearly $80 billion based on recent private valuations. The pledge was reaffirmed in the company's IPO filing made public Monday. The founders collectively hold about 1.69 billion shares valued at approximately $99.3 billion, with 80% equaling roughly $79.4 billion. The filing describes the pledge as voluntary and revocable, with donation timing and recipients unspecified, though the founders would retain voting control through a special share structure. Anthropic generated $16.3 billion in revenue in the first half of 2026, up from $1.2 billion a year earlier. The IPO could raise up to $100 billion, with trading on Nasdaq under "ANT" expected around Thanksgiving at a potential $1.5 trillion to $2 trillion valuation.