| Abbreviation | Definition |
|---|---|
| NGC | Northrop Grumman Corporation |
| NGC | Now Gennum Corporation |
| NGC | Numismatic Guaranty Corporation |
| NGCP | National Grid Corporation of the Philippines |
| NGEC | National Gas Export Company |
| NGEC | North Georgia Equipment Company |
| NGEN | Next Generation Manufacturing Canada |
| NGHP | Next Generation Home Products |
| NGHP | Northrop-Grumman Health Plan |
| NGI | Navigazione Generali Italiana |
| NGI | Nice Guys, Inc. |
| NGIP | New Germany Industrial Park |
| NGIS | New Generation Investment Services |
| NGIS | Northrop Grumman Integrated Systems |
| NGJ | Norman G. Jensen, Inc. |
| NGL | Group LLC |
| NGL | National Guardian Life |
| NGMC | National Group Management Corp |
| NGMC | Next Generation Management Corp |
| NGO | No Good Organization |