Jim Simons acquired 227 Thousand Aspen Aerogels shares worth $1.93 Million. That's 0.00% of their equity portfolio (1909th largest holding). The first Aspen Aerogels trade was made in Q3 2015. Since then Jim Simons bought shares twenty more times and sold shares on eleven occasions. The stake costed the investor $1.6 Million, netting the investor a gain of 21% so far.