| 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 | 15 | $139,819 | - |
| 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. a Fresenius Medical Care N.A. Company MA | Healthcare & Social Assistance | 5 | $133,962 | - |
| National Mentor LLC MN | Healthcare & Social Assistance | 4 | $130,843 | - |
| 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 | 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 | - | - |
| NATIONAL OnDemand, Inc. NC | Construction | 0 | - | F |
| National Packaging Company, INC. AL | Manufacturing | 0 | - | F |
| National Park College - Hot Springs National, AR AR | Educational Services | 1 | $60,680 | - |
| National Pen TN | - | 0 | - | - |
| National Penn Bank 3rd Fed Bank PA | - | 0 | - | - |
| National Planning Holdings CO | - | 0 | - | - |
| National Planning Holdings, Inc. CA | - | 0 | - | - |
| National Pool Partners Inc. AZ | Administrative & Waste Services | 0 | - | F |
| National Pool Partners Inc. FL | Administrative & Waste Services | 0 | - | F |
| National Pool Partners Inc. TX | Administrative & Waste Services | 0 | - | F |
| National Precast, Inc. MI | - | 0 | - | - |
| National Product Sales, Inc. (The NPSstore) UT | Wholesale Trade | 0 | - | F |
| National Products, Inc. WA | Manufacturing | 0 | - | F |
| National Public Radio, Inc. DC | Information & Media | 1 | $110,968 | - |
| National Quality Systems, Inc. FL | Information & Media | 1 | $120,000 | - |
| National Radio Astronomy Observatory VA | Professional & Technical Services | 10 | $100,342 | - |