Mario Gabelli's position in Blackrock is currently worth $4.71 Million. That's 0.05% of their equity portfolio (325th largest holding). The first Blackrock trade was made in Q2 2005. Since then Mario Gabelli bought shares 27 more times and sold shares on 29 occasions. The stake costed the investor $3.78 Million, netting the investor a gain of 24% so far.