Daniel Loeb's position in Martin Marietta Materials is currently worth $298 Million. That's 4.83% of their equity portfolio (7th largest holding). Daniel Loeb started to build up the position in Martin Marietta Materials in Q4 2006 and continued to invest until Q1 2007. Since then they sold 2.03 Million shares. The stake costed the investor $57.2 Million, netting the investor a gain of 420% so far.