Ken Griffin's position in Aspen Aerogels is currently worth $15.7 Million. That's 0.02% of their equity portfolio (924th largest holding). The first Aspen Aerogels trade was made in Q4 2015. Since then Ken Griffin bought shares eleven more times and sold shares on eight occasions. The stake costed the investor $11.3 Million, netting the investor a gain of 38% so far.