Joel Greenblatt's position in Tetra Tech is currently worth $3.1 Million. That's 0.05% of their equity portfolio (492nd largest holding). The first Tetra Tech trade was made in Q3 2011. Since then Joel Greenblatt bought shares 25 more times and sold shares on 22 occasions. The stake costed the investor $2.25 Million, netting the investor a gain of 38% so far.