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 *
BRUMLEY JON S
   2. Issuer Name and Ticker or Trading Symbol
ENCORE ACQUISITION CO [EAC] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
CEO, President and Director
(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   17,537 D $ 51.65 695,072 D  
Common Stock 03/09/2010   D   599,956 D (1) 95,116 D  
Common Stock 03/09/2010   D   95,116 D (2) 0 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
Options to purchase Common Stock $ 9.3333 03/09/2010   D     44,361 03/08/2004 03/08/2011 Common Stock 44,361 (3) 0 D  
Options to purchase Common Stock $ 26.5467 03/09/2010   D     18,970 02/14/2008 02/14/2015 Common Stock 18,970 $ 23.4533 0 D  
Options to purchase Common Stock $ 30.55 03/09/2010   D     6,546   (4) 02/09/2019 Common Stock 6,546 $ 19.45 0 D  
Options to purchase Common Stock $ 30.55 03/09/2010   D     43,542   (4) 02/09/2019 Common Stock 43,542 $ 19.45 0 D  
Options to purchase Common Stock $ 9.3333 03/09/2010   D     24,139 03/08/2004 03/08/2011 Common Stock 24,139 (3) 0 D  
Options to purchase Common Stock $ 8.4 03/09/2010   D     60,000 10/23/2004 10/23/2011 Common Stock 60,000 (3) 0 D  
Options to purchase Common Stock $ 12.4 03/09/2010   D     58,065 11/22/2005 11/22/2012 Common Stock 58,065 (3) 0 D  
Options to purchase Common Stock $ 17.1733 03/09/2010   D     68,464 02/10/2007 02/10/2014 Common Stock 68,464 (3) 0 D  
Options to purchase Common Stock $ 26.5467 03/09/2010   D     11,299 02/14/2008 02/14/2015 Common Stock 11,299 $ 23.4533 0 D  
Options to purchase Common Stock $ 31.1 03/09/2010   D     3,215 02/15/2009 02/15/2016 Common Stock 3,215 $ 18.9 0 D  
Options to purchase Common Stock $ 31.1 03/09/2010   D     26,734 02/15/2009 02/15/2016 Common Stock 26,734 $ 18.9 0 D  
Options to purchase Common Stock $ 25.73 03/09/2010   D     38,677 02/12/2010 02/12/2017 Common Stock 38,677 $ 24.27 0 D  
Options to purchase Common Stock $ 25.73 03/09/2010   D     3,886 02/12/2010 02/12/2017 Common Stock 3,886 $ 24.27 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
BRUMLEY JON S
777 MAIN STREET
SUITE 1400
FORT WORTH, TX 76102		   X     CEO, President and Director  

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 was converted into a cash payment representing the product of the number of shares subject to the option and the difference between the highest price per share paid within 60 days prior to the merger and the exercise price of the option.
(4) This option, which provided for vesting in three equal annual installments beginning on 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.

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