Over the past 10 years, Jeremy Grantham returned 327.3% compared to 257.4% for the S&P 500 — outperformed the S&P 500 by 69.9%.
18.9%
S&P 500: 15.0%
60.6%
S&P 500: 81.3%
45.2%
S&P 500: 79.5%
327.3%
S&P 500: 257.4%