| Transaction Date | Filer | Title | Filing | Transaction Type | Shares Traded | Price | Total Held* |
|---|---|---|---|---|---|---|---|
| Dec 10, 2013 | Corp VP, Government Relations | Form 4 | Open market or private sale of non-derivative or derivative security | 35,161 | $110.04 | 14,529 | |
| Feb 13, 2019 | Director, President and CEO | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 35,478 | -- | 81,825 | |
| Feb 28, 2007 | Corp. VP & Pres., Info. Tech. | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 36,000 | $71.85 | 36,000 | |
| Feb 28, 2007 | Corp. VP & Pres. Newport News | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 36,000 | $71.85 | 36,000 | |
| Feb 28, 2007 | Corp VP & Pres, Electron. Sys. | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 36,000 | $71.85 | 36,000 | |
| Feb 28, 2007 | Corp. VP & General Counsel | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 36,000 | $71.85 | 36,000 | |
| Feb 15, 2006 | Corp. VP & General Counsel | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 36,000 | $65.10 | 36,000 | |
| Feb 24, 2015 | Director, Chairman, CEO and President | Form 4 | Other acquisition or disposition (describe transaction) | 36,131 | -- | 304,780 | |
| Feb 20, 2016 | Director, Chairman, CEO and President | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 36,342 | -- | 172,433 | |
| Feb 20, 2016 | Director, Chairman, CEO and President | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 36,342 | -- | 55,903 |
* Represents the number of non-derivative securities directly held. (I) Indicates that some (or all) of these shares are held indirectly.