Joel Greenblatt acquired 4.11 Thousand Northrop Grumman shares worth $1.94 Million. That's 0.03% of their equity portfolio (601st largest holding). The first Northrop Grumman trade was made in Q4 2010. Since then Joel Greenblatt bought shares 24 more times and sold shares on 27 occasions. The stake costed the investor $1.46 Million, netting the investor a gain of 33% so far.