Joel Greenblatt's position in Martin Marietta Materials is currently worth $3.64 Million. That's 0.07% of their equity portfolio (383rd largest holding). The first Martin Marietta Materials trade was made in Q4 2015. Since then Joel Greenblatt bought shares fourteen more times and sold shares on thirteen occasions. The stake costed the investor $2.3 Million, netting the investor a gain of 58% so far.