| National Hospitalist Services, PC LA | Administrative & Waste Services | 25 | $231,379 | - |
| National Housing Trust DC | Professional & Technical Services | 1 | $98,800 | - |
| National Hybrid, Inc. NY | - | 0 | - | - |
| National Immigration Forum Inc. DC | - | 1 | $109,134 | - |
| National Indemnity Company NE | Finance & Insurance | 4 | $92,425 | - |
| National Information Solutions Cooperative ND | Professional & Technical Services | 3 | $82,961 | - |
| National Institute of Aerospace VA | - | 0 | - | - |
| National Institute of Aerospace Associates VA | Professional & Technical Services | 2 | $102,606 | - |
| National Institutes of Health, HHS MD | Professional & Technical Services | 212 | $110,118 | - |
| National Instruments Corporation TX | Professional & Technical Services | 15 | $170,690 | - |
| National Jewish Health CO | Healthcare & Social Assistance | 2 | $405,000 | C |
| National labor strategies NJ | Administrative & Waste Services | 0 | - | F |
| National Liability & Fire Insurance Company CT | Finance & Insurance | 1 | - | - |
| National Life Insurance Company VT | Finance & Insurance | 12 | $195,000 | - |
| National Lloyds-American Summit - NLASCO Services TX | - | 0 | - | - |
| National Louis University IL | Educational Services | 1 | $53,045 | - |
| National Machinery LLC OH | Manufacturing | 0 | - | C |
| National Maintenance & Repair, Inc. IL | Transportation & Warehousing | 1 | $83,013 | - |
| National Management Resources AL | Administrative & Waste Services | 0 | - | A |
| National Management Resources GA | Administrative & Waste Services | 0 | - | A |
| National Management Resources IL | Administrative & Waste Services | 0 | - | A |
| National Management Resources KY | Administrative & Waste Services | 0 | - | A |
| National Management Resources NC | Administrative & Waste Services | 0 | - | A |
| National Marker Company (NMC) RI | - | 0 | - | - |
| National Marrow Donor Program MN | Healthcare & Social Assistance | 21 | $133,900 | - |
| National Materials, Heidtman Steel MI | Manufacturing | 0 | - | F |
| National Medical Care Inc., a Fresenius Medical Care N.A. Company MA | Healthcare & Social Assistance | 9 | $139,458 | - |
| National Medical Care, Inc. MA | - | 8 | $168,398 | - |
| National Medical Care, Inc. a Fresenius Medical Care N.A. Company MA | Healthcare & Social Assistance | 5 | $133,962 | - |
| National Mentor LLC MN | Healthcare & Social Assistance | 7 | $140,250 | - |
| National Micro Rentals, Inc NJ | - | 0 | - | - |
| National Minority Quality Forum Inc. DC | Professional & Technical Services | 1 | $173,763 | - |
| National Molding, LLC PA | - | 0 | - | - |
| National Nonwovens MA | Manufacturing | 0 | - | F |
| National Novelty Brush Company PA | Manufacturing | 0 | - | D |
| National Oilwell - Pampa TX | - | 0 | - | - |
| National Oilwell Varco OH | - | 0 | - | - |
| National Oilwell Varco CA | - | 0 | - | - |
| National Oilwell Varco LA | - | 0 | - | - |
| National Oilwell Varco - Enerflow OK | - | 0 | - | - |
| National Oilwell Varco - SHP Facility TX | - | 0 | - | - |
| National Oilwell Varco -Galena Park TX | - | 0 | - | - |
| National Oilwell Varco, L..P TX | - | 32 | $99,680 | - |
| National Oilwell Varco, L.P. TX | Manufacturing | 10 | $154,223 | C |
| National Oilwell Varco- Oscar Nelson Jr. Dr. TX | - | 0 | - | - |
| National Oilwell Varco-Air Center Blvd. TX | - | 0 | - | - |
| National Oilwell Varco-Fiberglass Systems TX | - | 0 | - | - |
| National Oilwell Varco-Lockwood Dr. TX | - | 0 | - | - |
| National Oilwell Varco-San Angelo2 TX | - | 0 | - | - |
| National Oilwell Varco-Willis TX | - | 0 | - | - |