Mario Gabelli acquired 17.9 Thousand Graham Holdings shares worth $12.9 Million. That's 0.14% of their equity portfolio (182nd largest holding). The first Graham Holdings trade was made in Q1 2014. Since then Mario Gabelli bought shares fifteen more times and sold shares on 24 occasions. The stake costed the investor $9.31 Million, netting the investor a gain of 38% so far.