Over Uno, Citadel’s Griffin Reveals His Mistakes of 2008 Ken Griffin, who started hedge fund firm Citadel when he was 22, discusses how he felt in 2008 when everything he had built was at risk. Related Articles A Veteran of Melvin Capital Preps New Vehicle Stephen Taub D.E. Shaw Tops a 2024 Hedge Fund Ranking Michelle Celarier How Endowments and Foundations Can Align Investment Portfolios with Their Missions Sponsored by Fidelity Investments