X0303 4 2010-06-30 0 0001466593 Otter Tail Corp OTTR 0001191500 SPIES GARY J 215 S CASCADE ST FERGUS FALLS MN 56537-2801 1 0 0 0 Common Stock 26147.6796 D Phantom Stock Units(right to buy) 2010-06-30 4 A 0 773.1959 19.40 A Common Stock 773.1959 20024.3653 D Stock Options(right to buy) 26.25 2001-04-09 2011-04-09 Common Stock 2000 2000 D Total direct holdings include shares jointly held with his spouse at Piper Jaffrey, shares held by spouse at Dorn & Co and shares acquired individually through Dividend Reinvestment and pursuant to Restricted Stock Award distributions. 1-for-1 Phantom Stock Units acquired under the 1999 Stock Incentive Plan at fair market value as part of the Compensation Program for Outside Directors. He first elected this method of payment in 2001. There is no specific "Exercisable Date" on this Phantom Stock Award. There is no specific "Expiration Date" on this Phantom Stock Award. /s/Gary J Spies by Ella J Leapaldt, Attorney-in-Fact 2010-07-01