Anthropic's 7 co-founders each hold ~$14B in stock, could double at IPO

fortune · reddit · 2026-10-26

Per Anthropic's S-1 filing, the seven co-founders who left OpenAI in January 2021 each own 240M shares — about 16.9B shares combined, roughly 10% of the company. At the split-adjusted $58.90 private-round price, each stake is worth $13.7–14.4B; at a rumored $2T IPO valuation, $27–29B each. The stakes are almost perfectly equal, and the founders have pledged to give most of it away.

Related event: Anthropic IPO Filing Reveals Massive Losses and Record Compute Commitments(98 posts)→

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