CNBC profiles Anthropic's seven co-founders — Dario and Daniela Amodei, Tom Brown, Jack Clark, Jared Kaplan, Sam McCandlish, and Chris Olah — all formerly of OpenAI, where the Amodei siblings were vice presidents until frustration over AI safety and OpenAI's commercial ambitions drove them to launch their own safety-focused frontier lab in 2021. Ahead of a Nov. 19 IPO targeting a nearly $1.4 trillion valuation, each co-founder's roughly 1.4% stake is worth about $14 billion, with co-founders expected to sell shares for around $250 million each and to pledge 80% of that wealth to philanthropy.