Ken Griffin acquired 105 Thousand American Superconductor shares worth $1.29 Million. That's 0.00% of their equity portfolio (2583rd largest holding). The first American Superconductor trade was made in Q2 2015. Since then Ken Griffin bought shares 46 more times and sold shares on 34 occasions. The stake costed the investor $825 Thousand, netting the investor a gain of 57% so far.