X0303 5 2010-01-01 0 0 0 0000851520 EXPONENT INC EXPO 0001193222 CALIGIURI ROBERT D 149 COMMONWEATH DRIVE MENLO PARK CA 94025 0 1 0 0 Group Vice President Common Stock 2009-04-03 5 P 0 101 26.03 A 52737 D Common Stock 2009-07-02 5 P 0 99 23.37 A 43836 D Common Stock 2009-10-02 5 P 0 103 26.087 A 43939 D Common Stock 2010-01-01 5 P 0 87 26.448 A 44026 D Acquisition of stock pursuant to Exponent, Inc. Employee Stock Purchase Plan under the provisions of Section 423 of the Internal Revenue Code in a transaction exempt under SEC Rule 16b-3. By: Wendy Whitehouse For: Robert D. Caligiuri 2010-01-05