| Transaction Date | Filer | Title | Filing | Transaction Type | Shares Traded | Price | Total Held* |
|---|---|---|---|---|---|---|---|
| Aug 30, 2018 | Corp VP & Pres, Mission System | Form 4 | Open market or private sale of non-derivative or derivative security | 1,400 | $296.41 | 23,192 | |
| Aug 30, 2018 | Corp VP & Pres, Mission System | Form 4 | Open market or private sale of non-derivative or derivative security | 1,843 | $297.63 | 21,349 | |
| Aug 29, 2018 | Corp VP, Government Relations | Form 4 | Other acquisition or disposition | -- | -- | 25 | |
| Aug 27, 2018 | Corp VP, Government Relations | Form 4 | Open market or private sale of non-derivative or derivative security | 1,065 | $300.02 | 13,656 | |
| Aug 24, 2018 | Director, Chairman and CEO | Form 4 | Other acquisition or disposition | -- | -- | 1 | |
| Aug 24, 2018 | Director, Chairman and CEO | Form 4 | Other acquisition or disposition | -- | -- | 5,586 | |
| Aug 22, 2018 | Director, Chairman and CEO | Form 4 | Other acquisition or disposition (describe transaction) | 9,997 | -- | 85,551 | |
| Aug 22, 2018 | Director, Chairman and CEO | Form 4 | Other acquisition or disposition (describe transaction) | 9,997 | -- | 85,549 | |
| Aug 22, 2018 | Director, Chairman and CEO | Form 4 | Other acquisition or disposition (describe transaction) | 19,994 | -- | 239,059 | |
| Aug 06, 2018 | Director, Chairman and CEO | Form 4 | Other acquisition or disposition | -- | -- | 75,554 |
* Represents the number of non-derivative securities directly held. (I) Indicates that some (or all) of these shares are held indirectly.