X0306 4 2013-03-28 0 0000866121 ALLIANT TECHSYSTEMS INC ATK 0001568803 Tibbets Jay 1300 WILSON BOULEVARD SUITE 400 ARLINGTON VA 22209 0 1 0 0 Sr. VP and Int Pre Sport Group Deferred Stock Units 2013-03-28 4 A 0 9.8301 72.43 A Common Stock 9.8301 2748 D These securities were acquired through the deemed reinvestment of dividend equivalents in the form of additional Deferred Stock Units credited to the reporting person's account under the Issuer's Nonqualified Deferred Compensation Plan (NQDCP). The Deferred Stock Units will be settled 100% in shares of the Issuer's common stock following the reporting person's termination of employment or such other date specified by the reporting person under the terms of the NQDCP. Converts to common stock 1-for-1. /s/Jay Tibbets 2013-03-28