Jeremy Grantham acquired 1.7 Million Quest Diagnostics shares worth $247 Million. That's 1.23% of their equity portfolio (21st largest holding). The investor owns 1.48% of the outstanding Quest Diagnostics stock. The first Quest Diagnostics trade was made in Q1 2013. Since then Jeremy Grantham bought shares nine more times and sold shares on thirteen occasions. The stake costed the investor $183 Million, netting the investor a gain of 35% so far.