X0306 4 2013-09-13 0000005768 AMERICAN SCIENCE & ENGINEERING, INC. ASEI 0001314175 Brown Denis R AMERICAN SCIENCE AND ENGINEERING, INC. 829 MIDDLESEX TURNPIKE BILLERICA MA 01821 1 0 0 0 Common Stock 2013-09-13 4 S 0 1400 56.60 D 4802 I The Brown Family Trust Common Stock 8155 D Common Stock 170 I Margaret M. Brown IRA Spouse The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from a low of $56.6045 to a high of $56.6046 for an average of $56.6045. The reporting person undertakes to provide to American Science and Engineering, Inc., any security holder of American Science and Engineering, Inc., 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 to this Form 4. 2,700 shares, previously reported as Direct Holdings, were transferred to the Brown Family Trust /s/John B. De Luca, attorney-in fact 2013-09-16