Joel Greenblatt acquired 216 Thousand Alliant Energy shares worth $13.1 Million. That's 0.10% of their equity portfolio (246th largest holding). The first Alliant Energy trade was made in Q1 2016. Since then Joel Greenblatt bought shares twelve more times and sold shares on seven occasions. The stake costed the investor $11.9 Million, netting the investor a gain of 9.3% so far.