Over the past 10 years, Jeremy Grantham returned 306.5% compared to 255.5% for the S&P 500 — outperformed the S&P 500 by 51.0%.
19.3%
S&P 500: 19.7%
48.2%
S&P 500: 76.9%
33.7%
S&P 500: 72.4%
306.5%
S&P 500: 255.5%