X0202 4 2005-12-28 0 0000880115 CLAYTON WILLIAMS ENERGY INC /DE CWEI 0001329021 Clajon Holding CORP 6 DESTA DRIVE, SUITE 6500 MIDLAND TX 79705 0 0 1 0 Common Stock, $.10 par value 2005-12-28 4 P 0 9370 41.1921 A 4163986 I See These shares are owned by Clayton Williams Partnership, Ltd., a family limited partnership (3,969,202 shares) and CWPLCO, Inc. (194,784 shares). CWPLCO, Inc. is the wholly owned subsidiary of the reporting person and is the sole general partner of Clayton Williams Partnership, Ltd. /s/ Clajon Holding Corporation by L. Paul Latham, Vice President 2005-12-29