X0303 4 2009-03-31 0 0000075129 OTTER TAIL CORP OTTR 0001191500 SPIES GARY J 215 S CASCADE ST FERGUS FALLS MN 56537-2801 1 0 0 0 Common Stock 14686.8756 D Restricted Stock Units 2009-03-31 4 A 0 676.7426 22.165 A Common Stock 676.7426 15576.4993 D Stock Options (right to buy) 26.25 2001-04-10 2011-04-09 Common Stock 2000 2000 D Total direct holdings include shares jointly held with his spouse at Piper Jaffray and shares acquired individually through Dividend Reinvestment and pursuant to Restricted Stock Award distributions. These are Restricted Stock Units and have no conversion or exercise price at this time. There is no specific "Exercisable Date" on these Restricted Stock Units. There is no specific "Expiration Date" on these Restricted Stock Units. Restricted 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. /s/ Gary J Spies by Debra J Lill, Attorney-in-Fact 2009-04-02