X0303 4 2010-12-31 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 26775.0495 D Phantom Stock Units(right to buy) 2010-12-31 4 A 0 664.1576 22.585 A Common Stock 664.1576 22014.3515 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 Jaffray, shares held by spouse at Dorn & Co and shares acquired individually through Dividend Reinvestment and pursuant to Restricted Stock Award distributions. 1-for-1 There is no specific "Exercisable Date" on the Phantom Stock Award. There is no specific "Expiration Date" on this Phantom Stock Award. 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. See attached footnotes page. /s/Gary J Spies by Ella J Leapaldt, Attorney-in-Fact 2011-01-04