X0306 4 2015-07-01 1 0001466593 Otter Tail Corp OTTR 0001159198 MCINTYRE EDWARD J 215 S CASCADE ST FERGUS FALLS MN 56537-2801 1 1 0 0 CEO Common Stock 2015-07-01 4 F 0 6515 26.78 D 61875 D Restricted Stock Units(right to buy) 2016-02-06 2016-02-06 Common Stock 4800 4800 D Restricted stock acquired under the 1999-2014 Stock Incentive Plans. Mr. McIntyre retired as an Officer from the company effective July 1, 2015 and as a result his Restricted Stock vested immediately upon retirement. 6,515 shares of common stock were withheld by the Corporation to pay taxes due upon vesting of the shares, exempt pursuant to Rule 16b-3(e). Total direct holdings include shares acquired individually and shares acquired pursuant to Restricted Stock Awards and Performance Share Award distributions. Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation common stock. /S/Edward James McIntyre by Ella Leapaldt, Attorney-in-Fact 2015-07-02