Otter Tail Corp — Director's Dealing 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Otter Tail Corp (OTTR)
CIK: 0001466593
Period of Report: 2010-04-12

Reporting Person: PARTAIN NATHAN I (Director)

Non-Derivative Transactions

Holdings (Non-Derivative)

Holdings (Derivative)

Footnotes

F1: Shares of Common Stock acquired under the Corporation's Stock Incentive Plan, which is a grant of Restricted Stock. The 3,100 shares granted 4/12/2010 vest 25% yearly commencing 4/8/2011.

F2: This grant has a FMV of $21.835.

F3: Total direct holdings include shares jointly held with spouse at Merrill Lynch, shares held individually in the Dividend Reinvestment Plan and shares acquired individually pursuant to Restricted Stock Award distributions.