Jeremy Grantham acquired 237 Thousand 3M shares worth $33.4 Million. That's 0.12% of their equity portfolio (113th largest holding). The first 3M trade was made in Q2 2013. Since then Jeremy Grantham bought shares 21 more times and sold shares on 25 occasions. The stake costed the investor $28.3 Million, netting the investor a gain of 18% so far.