Ken Griffin acquired 113 Thousand Perma-Fix Environmental Services shares worth $1.25 Million. That's 0.00% of their equity portfolio (2738th largest holding). The first Perma-Fix Environmental Services trade was made in Q1 2017. Since then Ken Griffin bought shares seven more times and sold shares on eight occasions. The stake costed the investor $980 Thousand, netting the investor a gain of 28% so far.