X0202 4 2005-12-09 0 0000866121 ALLIANT TECHSYSTEMS INC ATK 0001188447 DEYOUNG MARK W ALLIANT TECHSYSTEMS INC. 5050 LINCOLN DRIVE EDINA MN 55436-1097 0 1 0 0 Sr VP & Pres ATK Ammo Group Common Stock 2005-12-09 4 M 0 3500 47.7467 A 5720 D Common Stock 2005-12-09 4 M 0 7200 59.12 A 12920 D Common Stock 2005-12-09 4 S 0 500 76.30 D 12420 D Common Stock 2005-12-09 4 S 0 300 76.31 D 12120 D Common Stock 2005-12-09 4 S 0 500 76.35 D 11620 D Common Stock 2005-12-09 4 S 0 1900 76.36 D 9720 D Common Stock 2005-12-09 4 S 0 800 76.38 D 8920 D Common Stock 2005-12-09 4 S 0 1900 76.45 D 7020 D Common Stock 2005-12-09 4 S 0 1100 76.46 D 5920 D Common Stock 2005-12-09 4 S 0 2500 76.47 D 3420 D Common Stock 2005-12-09 4 S 0 1000 76.54 D 2420 D Common Stock 2005-12-09 4 S 0 200 76.62 D 2220 D Common Stock 2005-12-12 4 M 0 2300 59.12 A 4520 D Common Stock 2005-12-12 4 S 0 500 76.84 D 4020 D Common Stock 2005-12-12 4 S 0 500 76.89 D 3520 D Common Stock 2005-12-12 4 S 0 300 76.93 D 3220 D Common Stock 2005-12-12 4 S 0 200 76.94 D 3020 D Common Stock 2005-12-12 4 S 0 300 77.01 D 2720 D Common Stock 2005-12-12 4 S 0 500 77.05 D 2220 D Common Stock 1255.25 I By 401(k) Employee Stock Option (right to buy) 47.7467 2005-12-09 4 M 0 3500 0 D 2005-01-22 2012-01-22 Common Stock 3500 0 D Employee Stock Option (right to buy) 59.12 2005-12-09 4 M 0 7200 0 D 2013-01-21 Common Stock 7200 7800 D Employee Stock Option (right to buy) 59.12 2005-12-12 4 M 0 2300 0 D 2013-01-21 Common Stock 2300 5500 D The amount reported includes 560 shares held in the Issuer's Employee Stock Purchase Plan as of September 30, 2005. Based on an on-line summary dated December 9, 2005. Options became exercisable in three equal installments beginning 01-21-04. /s/Mark W. DeYoung 2005-12-12