X0202 4 2006-05-08 0 0000006769 APACHE CORP APA 0001250242 PLANK ROGER B ONE POST ONE CENTRAL 2000 POST OAK BLVD, SUITE 100 HOUSTON TX 77056-4400 0 1 0 0 Exec. Vice Pres. & Chief Fin. Officer Common Stock 2006-05-08 4 M 0 1200. 0.00 A 59143. D Common Stock 2006-05-08 4 F 0 318. 71.75 D 58825. D Common Stock 12134. I By Spouse Common Stock 9006. I By Trust Common Stock 46430. I By trust fbo L.B. Plank Common Stock 37424.935 I Held by trustee of 401(k) plan Common Stock 15120.426 I Held by trustee of NQ Plan Common Stock 40667. I Indian Creek Holdings L.P. Restricted Stock Units 0.00 2006-05-08 4 M 0 1200. 0.00 D Common Stock 1200. 20333. D The shares of common stock of Apache are deemed to also represent certain preferred stock purchase rights ('Rights'). The Rights are not currently exercisable or separately tradable and presently are evidenced by certificates for shares of the common stock. Value attributable to such Rights, if any, is reflected in the market price of the common stock. Vesting on 05/06/06 of restricted stock under employer plan - data provided by plan administrator on 05/08/06. Vesting occurs 25% per year over four years. Shares withheld to cover required tax withholding on 05/06/06 vesting of restricted stock - data provided by plan administrator on 05/08/06. These shares are held in trust for the benefit of the reporting person's children. The reporting person and spouse are trustees. With tandem tax withholding right Cheri L. Peper, Attorney-in-Fact 2006-05-10