Warren Buffett ran a hedge fund for 12 years before quitting fund management and turning to banking, insurance, and reinsurance in 1969 as a better way to generate returns. Taking their cue from Buffett, Moore, Maverick, Greenlight, Cerberus, Citadel, HBK, D.E. Shaw, Apollo, AQR, Third Point, SAC, Paulson, and Soros have all acquired or started reinsurance companies (Soros has formed at least four).