Ken Griffin's position in Martin Marietta Materials is currently worth $8.7 Million. That's 0.01% of their equity portfolio (1294th largest holding). The first Martin Marietta Materials trade was made in Q2 2013. Since then Ken Griffin bought shares 42 more times and sold shares on 48 occasions. The stake costed the investor $4.68 Million, netting the investor a gain of 86% so far.