Ken Griffin acquired 263 Perma-Fix Environmental Services shares worth $2.5 Thousand. That's 0.00% of their equity portfolio (4629th largest holding). The first Perma-Fix Environmental Services trade was made in Q1 2017. Since then Ken Griffin bought shares six more times and sold shares on eight occasions. The stake costed the investor $2.14 Thousand, netting the investor a gain of 17% so far.