Mario Gabelli acquired 27.5 Thousand CMS Energy shares worth $1.98 Million. That's 0.02% of their equity portfolio (462nd largest holding). The first CMS Energy trade was made in Q1 2001. Since then Mario Gabelli bought shares fourteen more times and sold shares on 61 occasions. The stake costed the investor $388 Thousand, netting the investor a gain of 411% so far.