X0306 4 2013-02-27 0000005768 AMERICAN SCIENCE & ENGINEERING, INC. ASEI 0001263158 FABIANO ANTHONY R AMERICAN SCIENCE AND ENGINEERING, INC. 829 MIDDLESEX TURNPIKE BILLERICA MA 01821 1 1 0 0 CEO Common Stock 2013-02-27 4 M 0 2797 53.55 A 19488 D Common Stock 2013-02-27 4 M 0 3734 52.82 A 23222 D Common Stock 2013-02-27 4 M 0 5860 51.56 A 29082 D Common Stock 2013-02-27 4 S 0 12391 62.55 D 16691 D Employee Stock Option (Right to Buy) 53.55 2013-02-27 4 M 0 2797 0 D 2015-11-01 Common Stock 2797 0 D Employee Stock Option (Right to Buy) 52.82 2013-02-27 4 M 0 3734 0 D 2016-06-20 Common Stock 3734 0 D Employee Stock Option (Right to Buy) 51.56 2013-02-27 4 M 0 5860 0 D 2018-06-12 Common Stock 5860 0 D On November 1, 2005, the reporting person was granted a stock option to purchase 2,797 shares of common stock. Vesting of the option was based upon the satisfaction of certain performance criteria. The performance criteria were met, resulting in vesting of the option as to 2,797 shares on March 31, 2007. On June 20, 2006, the reporting person was granted a stock option to purchase 3,734 shares of common stock. Vesting of the option was based upon the satisfaction of certain performance criteria. The performance criteria were met, resulting in vesting of the option as to 3,734 shares on March 31, 2009. On June 12, 2008, the reporting person was granted a stock option to purchase 5,860 shares of common stock. Vesting of the option was based upon the satisfaction of certain performance criteria. The performance criteria were met, resulting in vesting of the option as to 3,907 shares on March 31, 2010 and 1,953 shares on March 31, 2011. /s/John B. De Luca, attorney-in-fact 2013-02-28