Ken Griffin acquired 145 Thousand Summit Materials shares worth $5.34 Million. That's 0.01% of their equity portfolio (1538th largest holding). The first Summit Materials trade was made in Q1 2015. Since then Ken Griffin bought shares 45 more times and sold shares on 40 occasions. The stake costed the investor $5.32 Million, netting the investor a gain of 0.5% so far.