Jeremy Grantham acquired 1.74 Million Quest Diagnostics shares worth $218 Million. That's 1.23% of their equity portfolio (21st largest holding). The investor owns 1.50% 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 twelve occasions. The stake costed the investor $187 Million, netting the investor a gain of 16% so far.