Mario Gabelli acquired 265k Otter Tail shares worth $23.3M. That's 0.21% of their equity portfolio (136th largest holding). The first Otter Tail trade was made in Q2 2002. Since then Mario Gabelli bought shares 33 more times and sold shares on 37 occasions. The stake costed the investor $7.3M, netting the investor a gain of 220% so far.