| Northern Illinois Steel IL | Wholesale Trade | 0 | — | A |
| Northern Illinois University IL | Educational Services | 11 | $80,017 | — |
| Northern Improvement Company ND | Construction | 0 | — | A |
| Northern Indiana Manufacturing IN | Manufacturing | 0 | — | F |
| Northern Industrial Construction, Inc. MI | Construction | 0 | — | A |
| Northern Industrial Mfg. Corp. MI | Manufacturing | 0 | — | A |
| Northern Ingredients MN | Manufacturing | 0 | — | A |
| Northern Insulation IL | Construction | 0 | — | F |
| Northern Insulation Solutions Inc AK | Construction | 0 | — | A |
| Northern Inyo Healthcare District CA | Healthcare & Social Assistance | 0 | — | D |
| Northern Iowa Therapy Associates, LLC IA | Healthcare & Social Assistance | 0 | — | F |
| Northern Iron & Machine MN | Manufacturing | 0 | — | B |
| Northern Itasca Hospital District MN | Healthcare & Social Assistance | 0 | — | F |
| Northern Kentucky Health Department KY | Public Administration | 0 | — | A |
| Northern Kentucky University KY | Educational Services | 2 | $83,567 | — |
| Northern Kentucky Water District KY | Utilities | 0 | — | F |
| Northern Lakes Community Mental Health Authority MI | Healthcare & Social Assistance | 0 | — | C |
| Northern Lakes Cooperative WI | Retail Trade | 0 | — | B |
| Northern Lakes Dental MN | Healthcare & Social Assistance | 0 | — | A |
| Northern Lakes Veterinary Hospital NH | Professional & Technical Services | 0 | — | A |
| Northern Laundry Services, LLC AK | Other Services | 0 | — | A |
| Northern Leader Fisheries, LLC WA | Agriculture & Forestry | 0 | — | A |
| Northern Leasing Systems, Inc. NY | — | 0 | — | — |
| Northern Lift Trucks, Inc. VT | Wholesale Trade | 0 | — | F |
| Northern Light - Inland Hospital ME | — | 0 | — | — |
| Northern Light Blue Hill Hospital ME | Healthcare & Social Assistance | 0 | — | F |
| Northern Light CA Dean Hospital ME | Healthcare & Social Assistance | 0 | — | F |
| Northern Light Continuing Care, Lakewood ME | Healthcare & Social Assistance | 0 | — | F |
| Northern Light Eastern Maine Medical Center ME | Healthcare & Social Assistance | 0 | — | F |
| Northern Light Health ME | Healthcare & Social Assistance | 0 | — | F |
| Northern Light Mayo Hospital ME | Healthcare & Social Assistance | 0 | — | F |
| Northern Light Mercy Hospital ME | Healthcare & Social Assistance | 0 | — | A |
| Northern Lights Home Health Care NY | Healthcare & Social Assistance | 0 | — | F |
| Northern Lights Power & Energy CA | Wholesale Trade | 0 | — | A |
| Northern Lights Services, Inc. WI | Healthcare & Social Assistance | 0 | — | F |
| Northern Lights, Inc. FL | Wholesale Trade | 0 | — | A |
| Northern Lights, Inc. ID | Utilities | 0 | — | F |
| Northern Lights, Inc. MA | Wholesale Trade | 0 | — | A |
| Northern Lights, Inc. WA | Wholesale Trade | 0 | — | A |
| Northern Lights, Inc. Gulf LA | Manufacturing | 0 | — | A |
| Northern Local School District OH | Educational Services | 0 | — | A |
| Northern Logistics Inc. MI | Transportation & Warehousing | 0 | — | A |
| Northern Louisiana Medical Center LA | Healthcare & Social Assistance | 0 | — | C |
| Northern Maine General ME | Healthcare & Social Assistance | 0 | — | F |
| Northern Maine Medical Center ME | Healthcare & Social Assistance | 1 | $550,000 | — |
| Northern Management LLC WI | Real Estate | 0 | — | F |
| Northern Manor Multicare Center NY | Healthcare & Social Assistance | 0 | — | F |
| Northern Manufacturing Co OH | Manufacturing | 0 | — | F |
| NORTHERN MARIANAS TECHNICAL INSTITUTE MP | Educational Services | 1 | $51,480 | — |
| Northern Merced Hulling Assn Inc CA | Agriculture & Forestry | 0 | — | C |
