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 * HUNTER ANDREA   2. Issuer Name and Ticker or Trading Symbol ENCORE ACQUISITION CO [EAC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP & Controller (Last) (First) (Middle) 777 MAIN STREET, SUITE 1400 3. Date of Earliest Transaction (Month/Day/Year) 03/09/2010 (Street) FORT WORTH, TX 76102 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 03/09/2010   F   1,569 D $ 51.65 17,776 D   Common Stock 03/09/2010   D   10,149 D (1) 7,627 D   Common Stock 03/09/2010   D   7,627 D (2) 0 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Options to purchase Common Stock

$ 30.55

03/09/2010

D

4,845

(3)

02/09/2019

Common Stock

4,845

$ 19.45

0

D

Options to purchase Common Stock

$ 31.1

03/09/2010

D

293

02/15/2009

02/15/2016

Common Stock

293

$ 18.9

0

D

Options to purchase Common Stock

$ 33.76

03/09/2010

D

1,568

(4)

02/11/2018

Common Stock

1,568

$ 16.24

0

D

Options to purchase Common Stock

$ 25.73

03/09/2010

D

776

02/12/2010

02/12/2017

Common Stock

776

$ 24.27

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
HUNTER ANDREA 777 MAIN STREET SUITE 1400 FORT WORTH, TX 76102			VP & Controller

Signatures

/s/ Robert C. Reeves (attorney-in-fact)		03/09/2010
**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 shares were disposed of pursuant to the merger agreement between the issuer and Denbury Resources Inc. in exchange for aggregate consideration of $50 per share (which may consist of cash, Denbury stock or a combination thereof) as provided for in the merger agreement.
(2)	Pursuant to the merger agreement, the shares converted into a number of restricted shares of Denbury common stock determined by multiplying (i) the number of shares by (ii) the exchange ratio used in determining the consideration payable to Encore stockholders who elected to receive only common stock consideration.
(3)	This option, which provided for vesting in three equal annual installments begining February 9, 2010, was converted into a cash payment representing the product of the number of shares subject to the option and the difference between the aggregate consideration per share provided for in the merger agreement and the exercise price of the option.
(4)	This option, which provided for vesting in three equal annual installments beginning February 11, 2009, was converted into a cash payment representing the product of the number of shares subject to the option and the difference between the aggregate consideration per share provided for in the merger agreement and the exercise price of the option.

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