Otter Tail Corp

Several class action complaints have been filed against OTC and certain other parties. The complaints allege, among other things, that the defendants and alleged co-conspirators conspired to fix, raise, maintain, and stabilize the price of PVC municipal water and electrical conduit pipe in violation of United States antitrust laws. See Note 9, Commitments and Contingencies, to the consolidated financial statements, which is incorporated herein by reference, for further discussion of this matter.