Mario Gabelli acquired 27.8 Thousand CMS Energy shares worth $1.6 Million. That's 0.02% of their equity portfolio (499th largest holding). The first CMS Energy trade was made in Q1 2001. Since then Mario Gabelli bought shares thirteen more times and sold shares on 58 occasions. The stake costed the investor $392 Thousand, netting the investor a gain of 308% so far.