Donald Yacktman's position in Armstrong World Industries is currently worth $135 Million. That's 1.18% of their equity portfolio (35th largest holding). The investor owns 2.71% of the outstanding Armstrong World Industries stock. The first Armstrong World Industries trade was made in Q1 2021. Since then Donald Yacktman bought shares seven more times and sold shares on four occasions. The stake costed the investor $98.1 Million, netting the investor a gain of 38% so far.