X0304 4 2011-11-21 0 0000866121 ALLIANT TECHSYSTEMS INC ATK 0001526009 Sexton Thomas G 1300 WILSON BOULEVARD ARLINGTON VA 22209 0 1 0 0 VP and Interim CFO Common Stock 2011-11-21 4 M 0 2250 47.746 A 5375 D Common Stock 2011-11-21 4 S 0 1100 56.454 D 4275 D Common Stock 2011-11-21 4 S 0 250 56.447 D 4025 D Common Stock 2011-11-21 4 S 0 900 56.45 D 3125 D Common Stock 1587 I By 401(k) Plan Employee Stock Option (right to buy) 47.746 2011-11-21 4 M 0 2250 0 D 2012-01-22 Common Stock 2250 0 D 1,175 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 September 30, 2011. Options became exercisable in three equal annual installments beginning January 22, 2003. /s/Thomas G. Sexton 2011-11-22