Chris Davis's position in Quest Diagnostics is currently worth $267 Million. That's 1.54% of their equity portfolio (21st largest holding). The investor owns 1.63% of the outstanding Quest Diagnostics stock. The first Quest Diagnostics trade was made in Q1 2014. Since then Chris Davis bought shares twelve more times and sold shares on 21 occasions. The stake costed the investor $136 Million, netting the investor a gain of 96% so far.