Ken Griffin acquired 674 Thousand Carmax shares worth $54.4 Million. That's 0.05% of their equity portfolio (429th largest holding). The first Carmax trade was made in Q2 2013. Since then Ken Griffin bought shares 56 more times and sold shares on 43 occasions. The stake costed the investor $53.8 Million, netting the investor a gain of 1.2% so far.