X0303 4 2010-03-09 1 0001125057 ENCORE ACQUISITION CO EAC 0001426943 HUNTER ANDREA 777 MAIN STREET SUITE 1400 FORT WORTH TX 76102 0 1 0 0 VP & Controller Common Stock 2010-03-09 4 F 0 1569 51.65 D 17776 D Common Stock 2010-03-09 4 D 0 10149 D 7627 D Common Stock 2010-03-09 4 D 0 7627 D 0 D Options to purchase Common Stock 30.55 2010-03-09 4 D 0 4845 19.45 D 2019-02-09 Common Stock 4845 0 D Options to purchase Common Stock 31.10 2010-03-09 4 D 0 293 18.90 D 2009-02-15 2016-02-15 Common Stock 293 0 D Options to purchase Common Stock 33.76 2010-03-09 4 D 0 1568 16.24 D 2018-02-11 Common Stock 1568 0 D Options to purchase Common Stock 25.73 2010-03-09 4 D 0 776 24.27 D 2010-02-12 2017-02-12 Common Stock 776 0 D 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. 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. 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. 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. /s/ Robert C. Reeves (attorney-in-fact) 2010-03-09