Ken Griffin acquired 22.6 Thousand Armstrong World Industries shares worth $2.62 Million. That's 0.00% of their equity portfolio (2014th largest holding). The first Armstrong World Industries trade was made in Q2 2013. Since then Ken Griffin bought shares 46 more times and sold shares on 44 occasions. The stake costed the investor $1.82 Million, netting the investor a gain of 44% so far.