X0202 4 2006-02-15 0001125057 ENCORE ACQUISITION CO EAC 0001253929 OLLE THOMAS 777 MAIN STREET FORT WORTH TX 76102 0 1 0 0 Senior Vice President Common Stock 2006-02-15 4 A 0 10289 0 A 32968 D Employee Stock Option (right to buy) 31.10 2006-02-15 4 A 0 9127 0 A 2016-02-15 Common Stock 9127 9127 D On July 12, 2005, the issuer declared a stock dividend, payable to all shareholders of record on June 27, 2005, of one share for each two shares of common stock outstanding. The total shares held by the reporting person as of the date of the reported transaction has been adjusted to reflect the stock dividend. The stock options become exercisable in three equal annual installments beginning on February 15, 2007. Rani M. Schatzle (by power of attorney) 2006-02-15