X0202 4 2004-12-13 0 0000866121 ALLIANT TECHSYSTEMS INC ATK 0001188447 DEYOUNG MARK W ALLIANT TECHSYSTEMS 5050 LINCOLN DRIVE EDINA MN 55436-1097 0 1 0 0 Sr VP & Pres ATK Ammo Group Common Stock 2004-12-13 4 M 0 450 25.0556 A 2627 D Common Stock 2004-12-13 4 M 0 1688 15.6482 A 4315 D Common Stock 2004-12-13 4 M 0 1688 17.00 A 6003 D Common Stock 2004-12-13 4 M 0 3000 27.389 A 9003 D Common Stock 2004-12-13 4 M 0 7000 47.7467 A 16003 D Common Stock 2004-12-13 4 S 0 5900 66.00 D 10103 D Common Stock 2004-12-13 4 S 0 800 66.01 D 9303 D Common Stock 2004-12-13 4 S 0 1900 66.02 D 7403 D Common Stock 2004-12-13 4 S 0 900 66.03 D 6503 D Common Stock 2004-12-13 4 S 0 1400 66.04 D 5103 D Common Stock 2004-12-13 4 S 0 500 66.05 D 4603 D Common Stock 2004-12-13 4 S 0 300 66.06 D 4303 D Common Stock 2004-12-13 4 S 0 626 66.07 D 3677 D Common Stock 2004-12-13 4 S 0 400 66.08 D 3277 D Common Stock 2004-12-13 4 S 0 200 66.09 D 3077 D Common Stock 2004-12-13 4 S 0 900 66.10 D 2177 D Common Stock 1167 I By 401(k) Employee Stock Option (right to buy) 25.0556 2004-12-13 4 M 0 450 0 D 2009-05-14 Common Stock 450 0 D Employee Stock Option (right to buy) 15.6482 2004-12-13 4 M 0 1688 0 D 2009-12-07 Common Stock 1688 0 D Employee Stock Option (right to buy) 17.00 2004-12-13 4 M 0 1688 0 D 2010-03-21 Common Stock 1688 0 D Employee Stock Option (right to buy) 27.389 2004-12-13 4 M 0 3000 0 D 2011-01-23 Common Stock 3000 0 D Employee Stock Option (right to buy) 47.7467 2004-12-13 4 M 0 7000 0 D 2012-01-22 Common Stock 7000 3500 D The amount reported includes 560 shares held in the Issuer's Employee Stock Purchase Plan as of September 30, 2004. Options became exercisable in three equal annual installments beginning 05-14-2000. Options became exercisable in three equal annual installments beginning 12-07-2000. Options became exercisable in three equal annual installments beginning 03-21-2001. Options became exercisable in three equal annual installments beginning 01-23-2002. Options became exercisable in three equal annual installments beginning 01-22-2003. /s/ Mark W. DeYoung 2004-12-13