Mario Gabelli's position in Northrop Grumman is currently worth $756 Thousand. That's 0.01% of their equity portfolio (603rd largest holding). The first Northrop Grumman trade was made in Q1 2001. Since then Mario Gabelli bought shares eighteen more times and sold shares on 41 occasions. The stake costed the investor $97.1 Thousand, netting the investor a gain of 678% so far.