Jeremy Grantham's position in MerckInc is currently worth $623 Million. That's 2.28% of their equity portfolio (12th largest holding). The first MerckInc trade was made in Q1 2013. Since then Jeremy Grantham bought shares 22 more times and sold shares on twenty occasions. The stake costed the investor $360 Million, netting the investor a gain of 73% so far.