X0306 4 2012-12-31 0 0001466593 Otter Tail Corp OTTR 0001191498 LIEBE ARVID R 215 S CASCADE ST FERGUS FALLS MN 56537-2801 1 0 0 0 Common Stock 18312 D Common Stock 4583.684 I By IRA Phantom Stock Units (right to buy) 2012-12-31 4 A 0 607.1645 24.705 A Common Stock 607.1645 8017.694 D Total direct holdings include shares acquired from 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. /s/ Arvid R Liebe by Debra J Lill, Attorney-in-Fact 2013-01-03