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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1. Name and Address of Reporting Person * SUNDT H WILSON   2. Issuer Name and Ticker or Trading Symbol UNISOURCE ENERGY CORP [UNS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1 S. CHURCH AVENUE, SUITE 201 3. Date of Earliest Transaction (Month/Day/Year) 01/03/2002 (Street) TUCSON, AZ 85701 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 05/10/2002   A   516 A $ 0 1,000 (1) D   Common Stock 05/10/2002   D   516 D (2) 1,000 (1) D   Common Stock 01/02/2003   A   573 A $ 0 1,000 (1) D

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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 Option (right to buy)

$ 18.74

01/03/2002

A

2,000

(3)

(3)

Common Stock

2,000

$ 0

0 (1)

D

Restricted Stock Units (in lieu of restricted stock)

(4)

05/10/2002

A

516

(4)

(4)

Common Stock

516

(2)

0 (1)

D

Stock Option (right to buy)

$ 17.44

01/02/2003

A

2,358

(3)

(3)

Common Stock

2,358

$ 0

0 (1)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SUNDT H WILSON 1 S. CHURCH AVENUE SUITE 201 TUCSON, AZ 85701	X

Signatures

UniSource Energy Corporation, on behalf of H. Wilson Sundt (deceased)		03/26/2010
**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)	The reporting person has not had any reportable transactions since retiring as a director of UniSource Energy Corporation on May 9, 2003. Therefore, the holdings listed reflect the holdings as of May 9, 2003. The shares or units, as applicable, being reported in this filing were reflected in the reporting person's holdings as disclosed in prior proxy statements filed by UniSource Energy Corporation.
(2)	The reporting person exchanged restricted stock shares for an equivalent number of restricted stock units in lieu of restricted stock shares on the date of the grant of such restricted stock.
(3)	The options vest as follows: 1/3 on the first anniversary of the date of the grant, 1/3 on the second anniversary of the date of the grant, and 1/3 on the third anniversary of the date of the grant. They expire on the date that is 10 years from the date of grant.
(4)	The restricted stock units in lieu of restricted stock vest on the third anniversary of the date of grant and are payable after vesting in accordance with the election of the reporting person on the date of grant.

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