X0306 4 2013-05-23 false 0001358071 CONCHO RESOURCES INC CXO 0001334945 Tabor A Wellford 2820 SELWYN AVENUE, SUITE 550 CHARLOTTE NC 28209 true false false false Common Stock 200 I By partnership Common Stock 2013-05-23 4 P false 1000 80 A 14540 D Common Stock 2013-05-23 4 P false 1000 80.69 A 1000 I See Footnote The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose. Represents shares purchased at a weighted-average price of open market same-day purchase. Purchase of shares took place at actual prices ranging from $80.64 to $80.71 per share. The reporting person undertakes to provide, upon request by the SEC staff, the issuer or any security holder of the issuer, full information regarding the number of shares purchased at each separate price. These securities are owned directly by a limited liability company, of which the reporting person is the owner of its managing member. /s/ C. William Giraud, as attorney-in-fact 2013-05-28