X0306 4 2014-07-14 0000005768 AMERICAN SCIENCE & ENGINEERING, INC. ASEI 0001352964 Galaznik Kenneth AMERICAN SCIENCE AND ENGINEERING, INC. 829 MIDDLESEX TURNPIKE BILLERICA MA 01821 0 1 0 0 SVP & CFO Common Stock 2014-07-14 4 M 0 574 51.56 A 13474 D Common Stock 2014-07-14 4 S 0 1168 69.06 D 12306 D Common Stock 422 I By 401 (k) Plan Employee Stock Option (right to buy) 51.56 2014-07-14 4 M 0 574 0 D 2018-06-12 Common Stock 574 0 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 6, 2014 The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from a low of $69.00 to a high of $69.2800 for an average of $69.0588. 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. Includes 422 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 July 9, 2014 On June 12, 2008, the reporting person was granted an option to purchase 1,474 shares of common stock. The option vests based on satisfaction of certain performance criteria. The performance criteria were met with respect to 983 shares of common stock on March 31, 2010 and 491 shares of common stock on March 31, 2011. Michael J. Muscatello, attorney-in-fact 2014-07-15