Over the past 10 years, Bill Ackman returned 193.0% compared to 246.8% for the S&P 500 — underperformed the S&P 500 by 53.8%.
6.5%
S&P 500: 10.1%
44.0%
S&P 500: 70.3%
20.3%
S&P 500: 61.7%
193.0%
S&P 500: 246.8%