| Northrop Grumman Systems Corporation LA | Transportation & Warehousing | 0 | — | B |
| Northrop Grumman Systems Corporation MA | Manufacturing | 0 | — | C |
| Northrop Grumman Systems Corporation MD | Manufacturing | 0 | — | B |
| Northrop Grumman Systems Corporation MN | Manufacturing | 0 | — | B |
| Northrop Grumman Systems Corporation MO | Manufacturing | 0 | — | D |
| Northrop Grumman Systems Corporation MS | Manufacturing | 0 | — | A |
| Northrop Grumman Systems Corporation NC | Transportation & Warehousing | 0 | — | A |
| Northrop Grumman Systems Corporation ND | Transportation & Warehousing | 0 | — | A |
| Northrop Grumman Systems Corporation NV | Transportation & Warehousing | 0 | — | F |
| Northrop Grumman Systems Corporation NY | Transportation & Warehousing | 0 | — | A |
| Northrop Grumman Systems Corporation OH | Manufacturing | 0 | — | A |
| Northrop Grumman Systems Corporation OK | Manufacturing | 0 | — | A |
| Northrop Grumman Systems Corporation PA | Manufacturing | 0 | — | A |
| Northrop Grumman Systems Corporation SC | Transportation & Warehousing | 0 | — | A |
| Northrop Grumman Systems Corporation TX | Manufacturing | 0 | — | C |
| Northrop Grumman Systems Corporation UT | Manufacturing | 0 | — | B |
| Northrop Grumman Systems Corporation VA | Transportation & Warehousing | 0 | — | A |
| Northrop Grumman Systems Corporation WA | Manufacturing | 0 | — | D |
| Northrop Grumman Systems Corporation WV | Manufacturing | 0 | — | B |
| Northrop Grumman Systems Corporation WY | Manufacturing | 0 | — | A |
| Northrop Grumman Systems Corporation - Electronic Attack Center of Excellence NY | — | 0 | — | — |
| Northrop Grumman Systems Corporation, Defense Systems Sector MD | — | 0 | — | — |
| Northrop Grumman Technical CA | — | 0 | — | — |
| Northrop Grumman Technical Services Inc. LA | — | 0 | — | — |
| Northrop Grumman Technical Services, Inc (NGTS) VA | — | 0 | — | — |
| Northrop Grumman Technical Services, Inc AFCEC Program - Tyndall AFB FL | — | 0 | — | — |
| Northrop Grumman Technical Services, Inc. AZ | — | 0 | — | — |
| Northrop Grumman Technical Services, Inc. CA | — | 0 | — | — |
| Northrop Grumman Technical Services, Inc. NC | — | 0 | — | — |
| Northrop Grumman Technical Services, Inc. TX | — | 0 | — | — |
| Northrop Grumman Technical Services, Inc. VA | — | 0 | — | — |
| Northrop Grumman Technical Services, Inc. (NGTS) VA | — | 0 | — | — |
| Northrop Grumman Technical Serviecs, Inc. NC | — | 0 | — | — |
| Northrop Grumman Technical Srvcs CA | — | 0 | — | — |
| Northrop Grumman Technical Srvcs (Lss Contract) CA | — | 0 | — | — |
| Northrop Grumman Technology CA | — | 0 | — | — |
| Northrop Grumman Technology Services, CA | — | 0 | — | — |
| Northrop Grumman, Information Systems Sector, Intelligence Systems Division VA | — | 0 | — | — |
| Northrop Grumman, Information Systems, Intelligence Systems Division VA | — | 0 | — | — |
| Northrup Grumman CA | — | 0 | — | — |
| Northrup Grumman Corporation IA | — | 0 | — | — |
| NORTHRUP GRUMMAN-MAXWELL/GUNTER ANNEX AL | — | 0 | — | — |
| Northshore WI | Healthcare & Social Assistance | 0 | — | A |
| NORTHSHORE EMS LLC LA | Healthcare & Social Assistance | 0 | — | C |
| Northshore Exteriors Inc. HI | Construction | 0 | — | F |
| Northshore Exteriors Inc. WA | Construction | 0 | — | F |
| Northshore Health care- Sherwood Lodge WI | Healthcare & Social Assistance | 0 | — | A |
| Northshore Health LLC WI | Healthcare & Social Assistance | 0 | — | A |
| Northshore Health Services WI | Healthcare & Social Assistance | 0 | — | F |
| Northshore Healthcare WI | Healthcare & Social Assistance | 0 | — | D |
