Jeremy Grantham's position in American Express is currently worth $19.7 Million. That's 0.07% of their equity portfolio (179th largest holding). The first American Express trade was made in Q1 2013. Since then Jeremy Grantham bought shares nineteen more times and sold shares on 28 occasions. The stake costed the investor $5.3 Million, netting the investor a gain of 272% so far.