Jeremy Grantham acquired 12.2k 3M shares worth $1.9M. That's 0.01% of their equity portfolio (371st largest holding). The first 3M trade was made in Q2 2013. Since then Jeremy Grantham bought shares 21 more times and sold shares on 27 occasions. The stake costed the investor $1.46M, netting the investor a gain of 30% so far.