Joel Greenblatt's position in Coherent is currently worth $4.37 Million. That's 0.04% of their equity portfolio (517th largest holding). The first Coherent trade was made in Q4 2010. Since then Joel Greenblatt bought shares seventeen more times and sold shares on 29 occasions. The stake costed the investor $2.2 Million, netting the investor a gain of 99% so far.