| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| ATK | Sr VP Govt Rel & Corp Comm | Mar 06, 2013 | Option Exercise | $66.20 | 386 | 25,553 | 20,711 | Mar 07, 2013, 06:13 PM |
| ATK | Sr VP Washington Operations | May 17, 2011 | Option Exercise | $72.70 | 1,144 | 83,169 | 15,323 | May 19, 2011, 08:49 AM |
| Symbol | Relationship | Date | Transaction | Value($) |
| ATK | Sr VP Govt Rel & Corp Comm | Mar 06, 2013 | Option Exercise | 25,553 |
| ATK | Sr VP Washington Operations | May 17, 2011 | Option Exercise | 83,169 |