X0306 4 2014-03-05 0 0000866121 ALLIANT TECHSYSTEMS INC ATK 0001568803 Tibbets Jay 1300 WILSON BOULEVARD, SUITE 400 ARLINGTON VA 22209 0 1 0 0 Sr VP and Pres. Sporting Group Common Stock 2014-03-05 4 F 0 185 137.35 D 6973 D Common Stock 2014-03-06 4 F 0 193 137.13 D 6780 D Common Stock 1563 I By 401(k) Plan Shares withheld to pay taxes applicable to the vesting of restricted stock. Following this transaction, 3,005 of these shares were subject to certain restrictions including possible forfeiture applicable to restricted stock issued under the Issuer's 2005 Stock Incentive Plan. Following this transaction, 2,419 of these shares are subject to certain restrictions including possible forfeiture applicable to restricted stock issued under the Issuer's 2005 Stock Incentive Plan. Based on a plan statement dated December 31, 2013. /s/Jay Tibbets 2014-03-06