Ken Griffin acquired 5.91 Thousand Perma-Fix Environmental Services shares worth $72.6 Thousand. That's 0.00% of their equity portfolio (4349th 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 seven occasions. The stake costed the investor $46.4 Thousand, netting the investor a gain of 57% so far.