Otter Tail Corp — Director's Dealing 2010

Jul 1, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Otter Tail Corp (OTTR)
CIK: 0001466593
Period of Report: 2010-06-30

Reporting Person: SPIES GARY J (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-06-30	Phantom Stock Units(right to buy)	$	A	773.1959	Acquired		Common Stock (773.1959)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	26147.6796	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Options(right to buy)	$26.25	2011-04-09	Common Stock (2000)	2000	Direct

Footnotes

F1: 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.

F2: 1-for-1

F3: 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.

F4: There is no specific "Exercisable Date" on this Phantom Stock Award.

F5: There is no specific "Expiration Date" on this Phantom Stock Award.