X0202 4 2006-08-29 0 0000866121 ALLIANT TECHSYSTEMS INC ATK 0001313857 Larson Blake E ALLIANT TECHSYSTEMS INC. 5050 LINCOLN DRIVE EDINA MN 55436-1097 0 1 0 0 Exec VP Mission Systems Group Common Stock 2006-08-29 4 M 0 1688 17.981 A 6758 D Common Stock 2006-08-29 4 M 0 2250 27.389 A 9008 D Common Stock 2006-08-29 4 M 0 4500 47.746 A 13508 D Common Stock 2006-08-29 4 M 0 6500 59.12 A 20008 D Common Stock 2006-08-29 4 S 0 14800 76.11 D 5208 D Common Stock 2006-08-29 4 S 0 138 76.41 D 5070 D Common Stock 184 I By Family Trust Common Stock 2023.292 I By 401(k) Employee Stock Option (right to buy) 17.981 2006-08-29 4 M 0 1688 0 D 2009-10-26 Common Stock 1688 0 D Employee Stock Option (right to buy) 27.389 2006-08-29 4 M 0 2250 0 D 2011-01-23 Common Stock 2250 0 D Employee Stock Option (right to buy) 47.746 2006-08-29 4 M 0 4500 0 D 2012-01-22 Common Stock 4500 0 D Employee Stock Option (right to buy) 59.12 2006-08-29 4 M 0 6500 0 D 2013-01-21 Common Stock 6500 0 D The amount reported includes 582 shares held in the Issuer's Employee Stock Purchase Plan as of June 30, 2006 and 2,500 shares subject to certain restrictions (including possible forfeiture) applicable to restricted stock grants under the Issuer's 1990 Equity Incentive Plan. Based on a plan statement dated June 30, 2006. Options became exercisable in three equal annual installments beginning 10/26/2000. Options became exercisable in three equal annual installments beginning 01/23/2002. Options became exercisable in three equal annual installments beginning 01/22/2003. Options became exercisable in three equal annual installments beginning 01/21/2004. /s/Blake E. Larson 2006-08-29