Tom Russo's position in Martin Marietta Materials is currently worth $436M. That's 4.68% of their equity portfolio (11th largest holding). The investor owns 1.17% of the outstanding Martin Marietta Materials stock. The first Martin Marietta Materials trade was made in Q1 1999. Since then Tom Russo bought shares 51 more times and sold shares on 52 occasions. The stake costed the investor $72.8M, netting the investor a gain of 499% so far.