#384 Ken Griffin: Founder of Citadel and Citadel Securities

2025-04-01

Because of the podcast I get to meet a lot of super successful people. I'm always asking them "Who is the smartest person you know" and "Who do you think has the best business?". "Ken Griffin" is a very common answer. I've heard Ken described in two ways: "Winner" and "Killer". For years I've come across interesting anecdotes about Ken. Like when he appears as a 19 year old kid in Ed Thorp's excellent autobiography A Man For All Markets. Or when John Arnold describe Ken's intense competitive drive following the blowup of Enron. And then consider the fact that I'm obsessed with people who run their business for decades (Ken founded Citadel 35 years ago and Citadel Securities 23 years ago) — and I knew I had to make an episode about his life and work. The only problem was there's no great biography of Ken. So to make this episode I transcribed this talk that Ken gave at Yale. And for additional context I read the book Ken recommends: Hardball: Are You Playing to Play or Playing to Win.

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