Mario Gabelli acquired 507 Thousand Comcast Corp shares worth $17.3 Million. That's 0.19% of their equity portfolio (135th largest holding). The first Comcast Corp trade was made in Q4 2002. Since then Mario Gabelli bought shares 31 more times and sold shares on 55 occasions. The stake costed the investor $9.26 Million, netting the investor a gain of 87% so far.