X0306 4 2016-09-20 0 0000880115 CLAYTON WILLIAMS ENERGY INC /DE CWEI 0001279988 FORD DAVIS L 3300 BEE CAVES ROAD, SUITE 650 AUSTIN TX 78746 1 0 0 0 Common Stock, $.10 par value 2016-09-20 4 S 0 1000 79.42 D 1000 D Common Stock, $.10 par value 9340 I Held in IRA The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $79.40 to $79.675 inclusive. The undersigned undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. /s/ Davis L. Ford by Mel G. Riggs, as attorney-in-fact 2016-09-21