| NATIONAL THERAPEUTIC SERVICES CA | Healthcare & Social Assistance | 0 | — | B |
| National Ticket Company PA | Manufacturing | 0 | — | C |
| National Tire & Wheel, Inc. WV | Retail Trade | 0 | — | A |
| National Tobacco Co. KY | — | 0 | — | — |
| National Trade Supply, LLC IN | Manufacturing | 0 | — | B |
| National Traffic Signs FL | Manufacturing | 0 | — | A |
| National Transfer, Inc. NJ | Administrative & Waste Services | 0 | — | A |
| National Tropical Botanical Garden HI | Arts & Entertainment | 1 | $50,066 | — |
| National Tube Supply CA | Wholesale Trade | 0 | — | F |
| National Tube Supply IL | Wholesale Trade | 0 | — | F |
| National Tube Supply TX | Wholesale Trade | 0 | — | F |
| National Underground Group AZ | Administrative & Waste Services | 0 | — | A |
| National Underground Group VA | Administrative & Waste Services | 0 | — | A |
| National Underground Railroad Freedom Center OH | Arts & Entertainment | 0 | — | A |
| National Union Fire Insurance Company of Pittsburgh, Pa. NJ | Finance & Insurance | 7 | $103,276 | — |
| National University CA | Educational Services | 0 | — | A |
| National Vacuum Environmental Services Corp. NY | Administrative & Waste Services | 0 | — | B |
| NATIONAL VAN LINES INC IL | Transportation & Warehousing | 0 | — | A |
| National Veterinary Associates CA | Professional & Technical Services | 0 | — | A |
| National Vinyl, LLC MA | Manufacturing | 0 | — | F |
| National Vision, Inc. GA | Healthcare & Social Assistance | 6 | $106,021 | — |
| National Vision, Inc. NJ | — | 0 | — | — |
| National Vision, Inc. (operating Walmart Vision Care) HI | — | 0 | — | — |
| National Vitamin Company AZ | Manufacturing | 0 | — | F |
| National Wall Panels, Inc. PA | Manufacturing | 0 | — | A |
| National Warehouse Management, LLC CA | Wholesale Trade | 0 | — | F |
| National Warehouse Management, LLC CO | Wholesale Trade | 0 | — | C |
| National Warehouse Management, LLC MI | Wholesale Trade | 0 | — | A |
| National Waste & Disposal, Inc. OK | Administrative & Waste Services | 0 | — | A |
| National Waste Clean, Inc. NJ | Administrative & Waste Services | 0 | — | A |
| National Water Infrastructure Services LLC LA | Utilities | 0 | — | A |
| NATIONAL WATER MAIN CLEANING CO NJ | Administrative & Waste Services | 1 | $150,000 | F |
| National Water Main Cleaning Company CT | Administrative & Waste Services | 0 | — | F |
| National Water Main Cleaning Company FL | Administrative & Waste Services | 0 | — | F |
| National Water Main Cleaning Company MA | Administrative & Waste Services | 0 | — | C |
| National Water Main Cleaning Company NY | Administrative & Waste Services | 0 | — | F |
| National Water Services, LLC. NM | Manufacturing | 0 | — | A |
| NATIONAL WELDING SUPPLY COMPANY LA | Wholesale Trade | 0 | — | A |
| National Wiper Alliance a business of Ecolab NC | Manufacturing | 0 | — | D |
| National Wire & Cable Corp. CA | Manufacturing | 0 | — | F |
| National Wire LLC TX | Manufacturing | 0 | — | F |
| National Wood Products UT | Wholesale Trade | 0 | — | D |
| National Wrecking Company IL | Construction | 0 | — | F |
| NATIONAL YOUTH ADVOCATE PROGRAM AZ | Healthcare & Social Assistance | 0 | — | A |
| NATIONAL YOUTH ADVOCATE PROGRAM FL | Healthcare & Social Assistance | 0 | — | C |
| NATIONAL YOUTH ADVOCATE PROGRAM GA | Healthcare & Social Assistance | 0 | — | A |
| NATIONAL YOUTH ADVOCATE PROGRAM IL | Healthcare & Social Assistance | 0 | — | B |
| NATIONAL YOUTH ADVOCATE PROGRAM IN | Healthcare & Social Assistance | 0 | — | A |
| NATIONAL YOUTH ADVOCATE PROGRAM KY | Healthcare & Social Assistance | 0 | — | A |
| NATIONAL YOUTH ADVOCATE PROGRAM LA | Healthcare & Social Assistance | 0 | — | A |
