X0304 4 2011-10-04 0 0000880115 CLAYTON WILLIAMS ENERGY INC /DE CWEI 0001200312 RIGGS MEL G 6 DESTA DRIVE, SUITE 6500 MIDLAND TX 79705 1 1 1 0 Executive Vice President & COO Common Stock, $.10 par value 3044170 I See Common Stock, $.10 par value 2011-10-04 4 P 0 500 34.82 A 9888 D This amount includes 3,041,412 shares owned by The Williams Children's Partnership, Ltd. ("WCPL"), a family limited partnership in which the five adult children of Clayton W. Williams, Jr., the Chairman of the Board and Chief Executive Officer of the Issuer, are limited partners, LPL/Williams GP, LLC ("LPL/Williams") is the sole general partner of WCPL and the Reporting Person is the sole member of LPL/Williams. As the sole member of LPL/Williams, the Reporting Person has a pecuniary interest in only 0.002% of the Issuer's common stock held by WCPL and disclaims beneficial ownership of the remaining 99.998% of the Issuer's common stock held by WCPL. This amount also includes 1,382 shares in which the Reporting person holds a power of attorney and 1,376 shares held in the Company's 401(k) Plan and Trust, of which 23 shares have been acquired since 6/1/11. /s/ Mel G. Riggs 2011-10-05