Mario Gabelli acquired 273 Thousand Otter Tail shares worth $21.3 Million. That's 0.22% of their equity portfolio (118th largest holding). The first Otter Tail trade was made in Q2 2002. Since then Mario Gabelli bought shares 32 more times and sold shares on 35 occasions. The stake costed the investor $7.53 Million, netting the investor a gain of 184% so far.