Anthropic founders pledge to donate 80% of equity, value possibly nearly $80 billion

Seven Anthropic co-founders have pledged to donate 80% of their personal equity to charity, and reiterated that pledge in an IPO filing made public on Monday; Fortune estimates the value at about $79.4 billion. The seven together hold about 1.69 billion shares, worth about $99.3 billion at the latest private financing price, or about $11 billion donated per person; the filing states that the pledge is voluntary and revocable, and the timing and recipients of the donations remain undetermined. The S-1 shows Anthropic revenue of $16.3 billion in the first half of 2026, far above $1.2 billion in the same period last year; the company plans to list on Nasdaq under the ticker ANT, raise up to $100 billion in the IPO, and is expected to list around Thanksgiving, with a valuation possibly reaching $1.5 trillion to $2 trillion.