| Description | Date |
|---|
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2001-03-29 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2001-03-20 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2001-03-07 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2001-02-23 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2000-08-28 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2000-08-14 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2000-06-23 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2000-05-08 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2000-05-02 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2000-03-24 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2000-01-19 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 2000-01-10 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-12-08 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-11-04 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-11-01 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-09-01 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-08-23 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-08-11 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-03-05 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-02-18 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-02-01 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-01-20 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1999-01-14 |
| Transfer of control from Northrop Grumman Corporation to NNG, Inc. | 1998-11-16 |