Jeremy Grantham's position in MerckInc is currently worth $844M. That's 1.90% of their equity portfolio (17th largest holding). The first MerckInc trade was made in Q1 2013. Since then Jeremy Grantham bought shares 29 more times and sold shares on 21 occasions. The stake costed the investor $593M, netting the investor a gain of 42% so far.