Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
ERICKSON JOHN D
  2. Issuer Name and Ticker or Trading Symbol
Otter Tail Corp [OTTR]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President & CEO
(Last)
(First)
(Middle)
215 S CASCADE ST
3. Date of Earliest Transaction (Month/Day/Year)
12/15/2009
(Street)

FERGUS FALLS, MN 56537-2801
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 12/15/2009   G(1)(2) V 4,000 (3) D $ 0 96,852 D  
Common Stock 12/15/2009   M   10,000 A $ 19.75 106,852 D  
Common Stock 12/15/2009   S(1)(2)   100 D $ 23.3 106,752 D  
Common Stock 12/15/2009   S(2)   100 D $ 23.31 106,652 D  
Common Stock 12/15/2009   S(2)   100 D $ 23.33 106,552 D  
Common Stock 12/15/2009   S(2)   300 D $ 23.34 106,252 D  
Common Stock 12/15/2009   S(2)   200 D $ 23.35 106,052 D  
Common Stock 12/15/2009   S(2)   100 D $ 23.41 105,952 D  
Common Stock 12/15/2009   S(2)   500 D $ 23.43 105,452 D  
Common Stock 12/15/2009   S(2)   600 D $ 23.46 104,852 D  
Common Stock 12/15/2009   S(2)   100 D $ 23.47 104,752 D  
Common Stock 12/15/2009   S(2)   100 D $ 23.48 104,652 D  
Common Stock 12/15/2009   S(2)   900 D $ 23.49 103,752 D  
Common Stock 12/15/2009   S(2)   500 D $ 23.5 103,252 D  
Common Stock 12/15/2009   S(2)   200 D $ 23.51 103,052 D  
Common Stock 12/15/2009   S(2)   1,500 D $ 23.52 101,552 D  
Common Stock 12/15/2009   S(2)   500 D $ 23.53 101,052 D  
Common Stock 12/15/2009   S(2)   900 D $ 23.54 100,152 D  
Common Stock 12/15/2009   S(2)   1,000 D $ 23.55 99,152 D  
Common Stock 12/15/2009   S(2)   1,100 D $ 23.56 98,052 D  
Common Stock 12/15/2009   S(2)   200 D $ 23.565 97,852 D  
Common Stock 12/15/2009   S(2)   300 D $ 23.57 97,552 D  
Common Stock 12/15/2009   S(2)   500 D $ 23.575 97,052 D  
Common Stock 12/15/2009   S(2)   200 D $ 23.58 96,852 (4) D  
Common Stock 12/15/2009   G(1)(5) V 4,000 (3) A $ 0 4,000 I By Foundation
Common Stock 12/15/2009   S(1)(5)   100 D $ 23.28 3,900 I By Foundation
Common Stock 12/15/2009   S(5)   299 D $ 23.29 3,601 I By Foundation
Common Stock 12/15/2009   S(5)   101 D $ 23.3 3,500 I By Foundation
Common Stock 12/15/2009   S(5)   400 D $ 23.31 3,100 I By Foundation
Common Stock 12/15/2009   S(5)   700 D $ 23.32 2,400 I By Foundation

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Options (right to buy) $ 19.75 12/15/2009   M     10,000 04/10/2001(6) 04/10/2010 Common Stock 25,000 $ 0 10,000 D  
Stock Options (right to buy) $ 19.75 12/16/2009   M     10,000 04/10/2001(6) 04/10/2010 Common Stock 25,000 $ 0 0 D  
Stock Options (right to buy) $ 26.25             04/09/2002(6) 04/09/2011 Common Stock 75,000   75,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
ERICKSON JOHN D
215 S CASCADE ST
FERGUS FALLS, MN 56537-2801
  X     President & CEO  

Signatures

 /s/ John D Erickson by Debra J Lill, Attorney-in-Fact   12/17/2009
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) All sales and gifts reported in this Form 4 were effected pursuant to Rule 10b5-1(c) trading plans.
(2) Trading Plan was adopted by the reporting person on 3/6/2008.
(3) These shares were gifted from the joint account with his wife through Merrill Lynch to The John and Kim Erickson Family Foundation, a non-profit charitable corporation under Section 501(c)(3) of the Internal Revenue Code also held with Merrill Lynch.
(4) Total direct holdings include shares jointly held with spouse through Merrill Lynch and shares acquired individually pursuant to Restricted Stock Awards and Performance Award distributions.
(5) Trading Plan was adopted by The John and Kim Erickson Family Foundation, a non-profit charitable corporation under Section 501(c)(3) of the Internal Revenue Code on 5/7/2008.
(6) Stock options vest in cumulative annual installments of 25% beginning the date shown.
 
Remarks:
Due to SEC limitations of 30 transactions per Form 4 filing, please view the second Form 4 filing for full report.  On July 1, 2009, Otter Tail Corporation (CIK #001466593) became the successor of Otter Tail Power Company (formerly Otter Tail Corporation CIK #0000075129) pursuant to an internal holding company reorganization.  The reorganization resulted in Otter Tail Corporation's becoming a parent holding company of Otter Tail Power Company, but did not alter the proportionate interests of security holders.

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