X0303 4 2008-08-07 0000873364 CEPHALON INC CEPH 0001209720 VAUGHT JEFFRY L 41 MOORES RD. FRAZER PA 19355 0 1 0 0 Exec. VP, R&D Common Stock 2008-08-07 4 S 0 17560 76.44 D 48382 D Common Stock 190 I by Trust This price is a weighted average sale price. The prices at which the shares actually sold ranged from $76.64 to $76.31. The reporting person has provided to the issuer, and upon request will provide to any security holder of the issuer or to the SEC staff, information regarding the number of shares sold at each price within the range. Carolyn S. Iosca, Attorney in Fact For: Jeffry L. Vaught 2008-08-11