Otter Tail Corp — Director's Dealing 2010

Apr 7, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Otter Tail Corp (OTTR)
CIK: 0001466593
Period of Report: 2010-04-05

Reporting Person: MACFARLANE JOHN C (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-04-05	Common Stock	M	15000	$19.75	Acquired	71401.335	Direct
2010-04-05	Common Stock	S	600	$22.14	Disposed	70801.335	Direct
2010-04-05	Common Stock	S	800	$22.15	Disposed	70001.335	Direct
2010-04-05	Common Stock	S	563	$22.17	Disposed	69438.335	Direct
2010-04-05	Common Stock	S	200	$22.1725	Disposed	69238.335	Direct
2010-04-05	Common Stock	S	537	$22.18	Disposed	68701.335	Direct
2010-04-05	Common Stock	S	400	$22.19	Disposed	68301.335	Direct
2010-04-05	Common Stock	S	5800	$22.20	Disposed	62501.335	Direct
2010-04-05	Common Stock	S	4200	$22.21	Disposed	58301.335	Direct
2010-04-05	Common Stock	S	1200	$22.22	Disposed	57101.335	Direct
2010-04-05	Common Stock	S	200	$22.23	Disposed	56901.335	Direct
2010-04-05	Common Stock	S	500	$22.24	Disposed	56401.335	Direct
2010-04-06	Common Stock	M	10000	$19.75	Acquired	66401.335	Direct
2010-04-06	Common Stock	S	100	$22.07	Disposed	66301.335	Direct
2010-04-06	Common Stock	S	200	$22.08	Disposed	66101.335	Direct
2010-04-06	Common Stock	S	100	$22.085	Disposed	66001.335	Direct
2010-04-06	Common Stock	S	300	$22.09	Disposed	65701.335	Direct
2010-04-06	Common Stock	S	900	$22.10	Disposed	64801.335	Direct
2010-04-06	Common Stock	S	1081	$22.11	Disposed	63720.335	Direct
2010-04-06	Common Stock	S	100	$22.1185	Disposed	63620.335	Direct
2010-04-06	Common Stock	S	100	$22.12	Disposed	63520.335	Direct
2010-04-06	Common Stock	S	1301	$22.13	Disposed	62219.335	Direct
2010-04-06	Common Stock	S	100	$22.1353	Disposed	62119.335	Direct
2010-04-06	Common Stock	S	1500	$22.14	Disposed	60619.335	Direct
2010-04-06	Common Stock	S	100	$22.1443	Disposed	60519.335	Direct
2010-04-06	Common Stock	S	100	$22.145	Disposed	60419.335	Direct
2010-04-06	Common Stock	S	701	$22.15	Disposed	59718.335	Direct
2010-04-06	Common Stock	S	100	$22.1598	Disposed	59618.335	Direct
2010-04-06	Common Stock	S	1400	$22.16	Disposed	58218.335	Direct
2010-04-06	Common Stock	S	1397	$22.17	Disposed	56821.335	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-04-05	Stock Options (right to buy)	$19.75	M	15000	Disposed	2010-04-10	Common Stock (100000)	Direct
2010-04-06	Stock Options (right to buy)	$19.75	M	10000	Disposed	2010-04-10	Common Stock (100000)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Options (right to buy)	$26.25	2011-04-09	Common Stock (100000)	100000	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1(c) trading plan adopted by the reporting person on 12/9/2009.

F2: Total direct holdings include shares jointly held with spouse in the Dividend Reinvestment Plan and the Employee Stock Purchase Plan and shares acquired individually pursuant to Restricted Stock Award distributions.

F3: Stock options vest in cumulative annual installments of 25% beginning the date shown.