X0203 3 2010-11-04 0 0000005768 AMERICAN SCIENCE & ENGINEERING, INC. ASEI 0001505398 Tropeano Michael AMERICAN SCIENCE AND ENGINEERING, INC. 829 MIDDLESEX TURNPIKE BILLERICA MA 01821 0 1 0 0 SVP Common Stock 4365 D Stock Options 13.08 2013-11-20 Common Stock 500 D Stock Options 46.68 2015-02-10 Common Stock 4000 D Stock Options 53.55 2015-11-01 Common Stock 6000 D The option became exercisable on 11/20/2006. The option became exercisable for 2000 shares each on February 10, 2007 and 2008. The option became exercisable with three equal installments on November 1, 2006, 2007 and 2008. Includes 1,251 shares of AS&E common stock acquired under the AS&E 401(k) Plan. The information in this report is based on a plan statement dated as of 11/9/2010. Exhibit 24 -- Power of Attorney M. Colette Cooke 2010-11-12