Ken Griffin's position in Tetra Tech is currently worth $11.9 Million. That's 0.01% of their equity portfolio (1037th largest holding). The first Tetra Tech trade was made in Q2 2013. Since then Ken Griffin bought shares 45 more times and sold shares on 36 occasions. The stake costed the investor $7.88 Million, netting the investor a gain of 51% so far.