Jeremy Grantham acquired 2.01 Million Quest Diagnostics shares worth $355 Million. That's 1.06% of their equity portfolio (30th largest holding). The investor owns 1.79% of the outstanding Quest Diagnostics stock. The first Quest Diagnostics trade was made in Q1 2013. Since then Jeremy Grantham bought shares seventeen more times and sold shares on fifteen occasions. The stake costed the investor $233 Million, netting the investor a gain of 52% so far.