X0306 4 2013-10-25 true 0001358071 CONCHO RESOURCES INC CXO 0001370287 Keenan W Howard JR 410 PARK AVENUE, 19TH FLOOR NEW YORK NY 10022 true false false false Common Stock 85232 I See footnote Common Stock 91098 I See footnote Common Stock 2013-10-25 4 D false 1800 0 D 383151 D These securities are owned directly by Yorktown Energy Partners V, L.P., of which Yorktown V Company LLC is the general partner. The reporting person is a member and manager of Yorktown V Company LLC. These securities are owned directly by Yorktown Energy Partners VI, L.P., of which Yorktown VI Company LP is the general partner, of which Yorktown VI Associates LLC is the general partner. The reporting person is a member and manager of Yorktown VI Associates LLC. /s/ W. Howard Keenan, Jr. 2013-10-29