Ken Griffin acquired 25.4 Thousand Perma-Fix Environmental Services shares worth $315 Thousand. That's 0.00% of their equity portfolio (3854th largest holding). The first Perma-Fix Environmental Services trade was made in Q1 2017. Since then Ken Griffin bought shares five more times and sold shares on six occasions. The stake costed the investor $199 Thousand, netting the investor a gain of 58% so far.