Updated S-1: Anthropic's seven co-founders will sell $1.75B of stock in next week's IPO, each offering shares worth ~$250M at the midpoint of its IPO range (Dylan Sloan/Bloomberg)

Anthropic's seven co-founders will sell $1.75B of stock in next week's IPO. Each co-founder will offer shares worth ~$250M at the midpoint of its IPO range. This information comes from an updated prospectus released Tuesday.