X0303 4 2010-03-09 1 0001125057 ENCORE ACQUISITION CO EAC 0001244361 LOWE ANDY R 777 MAIN STREET SUITE 1400 FORT WORTH TX 76102 0 1 0 0 Vice President, Marketing Common Stock 2010-03-09 4 F 0 1897 51.65 D 16829 D Common Stock 2010-03-09 4 D 0 8998 D 7831 D Common Stock 2010-03-09 4 D 0 7831 D 0 D Options to purchase Common Stock 30.55 2010-03-09 4 D 0 2550 19.45 D 2019-02-09 Common Stock 2550 0 D Options to purchase Common Stock 30.55 2010-03-09 4 D 0 2426 19.45 D 2019-02-09 Common Stock 2426 0 D Options to purchase Common Stock 33.76 2010-03-09 4 D 0 233 16.24 D 2018-02-11 Common Stock 233 0 D Options to purchase Common Stock 33.76 2010-03-09 4 D 0 6231 16.24 D 2018-02-11 Common Stock 6231 0 D Options to purchase Common Stock 25.73 2010-03-09 4 D 0 3638 24.27 D 2010-02-12 2017-02-12 Common Stock 3638 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 beginning 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