Joel Greenblatt acquired 52.9 Thousand NiSource shares worth $2.1 Million. That's 0.02% of their equity portfolio (666th largest holding). The first NiSource trade was made in Q3 2015. Since then Joel Greenblatt bought shares twelve more times and sold shares on six occasions. The stake costed the investor $1.77 Million, netting the investor a gain of 18% so far.