| N & K Corporation | 7 | $4.9M | City of Chicago |
| N&S Property Services LLC | 5 | $2.4M | Smithsonian Institution |
| N & S Water Assistance LLC | 12 | $90K | Federal Prison System / Bureau of Prisons |
| N-Ovation Technology Group LLC | 9 | $1.8M | Department of Veterans Affairs |
| N/S Corporation | 3 | $38K | MTA Procurements |
| N T K Construction Inc | 22 | $22M | San Francisco |
| N. Texas Municipal Water Dist. | 14 | $15M | City of Mesquite |
| N Y S Department of Correctional Serv | 6 | $1.7M | NY State Authorities |
| N Y S Industries for the Disabled Inc | 12 | $4.4M | NY State Authorities |
| Nac Van and Truck | 3 | $53K | MTA Procurements |
| Nacha | 18 | $13K | Oregon State Treasury |
| Nadler Mobile LLC | 13 | $11M | MTA Procurements |
| Nag, LLC | 10 | $1.3M | Department of the Navy |
| Nagarro Inc. | 4 | $23M | New York City |
| Naik Consulting Group PC | 42 | $223M | NY State Authorities |
| Nakupuna Consulting LLC | 3 | $12M | Department of the Navy |
| Nalco Company LLC | 9 | $1.4M | Federal Prison System / Bureau of Prisons |
| Nalta Technologies, LLC | 35 | $5.4M | MTA Procurements |
| Nambu Service Co., Ltd. | 12 | $346K | Department of the Army |
| Nami Chicago | 3 | $859K | City of Chicago |
| Nammo Defense Systems Inc. | 4 | $14M | Department of the Air Force |
| Nammo Pocal Inc | 4 | $21M | Department of the Army |
| Nan Inc | 11 | $608M | Department of the Navy |
| Nanoentek America, Inc. | 3 | $285K | Defense Health Agency |
| Nanohmics Inc | 3 | $1.3M | Defense Advanced Research Projects Agency |
| Nanoracks, LLC | 3 | $740K | National Aeronautics and Space Administration |
| Nanoscience Instruments Inc | 5 | $540K | U.S. Customs and Border Protection |
| Nanosonics Inc | 4 | $236K | Defense Health Agency |
| Nap Industries Group LLC | 3 | $0 | MTA Procurements |
| NAPA | 46 | $6K | City of Los Angeles Controller |
| NAPA M3 Inc. | 4 | $7K | Defense Logistics Agency |
| Naphcare LLC | 15 | $536K | Federal Prison System / Bureau of Prisons |
| Narda Holdings, Inc. | 6 | $2.4M | Department of the Navy |
| Nardis, Inc | 5 | $2K | City of Mesquite |
| Nas Solutions Group, LLC | 3 | $877K | Department of the Air Force |
| Nasatka Barrier, Incorporated | 3 | $523K | Department of the Air Force |
| Nascence Group LLC | 4 | $426K | Department of the Army |
| Nasco Aerospace and Electronics LLC | 43 | $1.4M | Department of the Navy |
| Nassau Auto Spring Co., Inc. | 3 | $750K | MTA Procurements |
| Nassau Tool Works, Inc | 14 | $2.4M | Defense Logistics Agency |
| Nathan Associates LLC | 10 | $117M | Agency for International Development |
| Nathan James Tyler | 6 | $9K | City of Mesquite |
| Nathanial Rand Inc | 39 | $107M | MTA Procurements |
| National Academies of Emergency Dispatch | 6 | $5K | City-Parish of Baton Rouge |
| National Academy of Sciences | 22 | $16M | Defense Health Agency |
| National Arbitration and Mediation, Inc. | 13 | $290K | NY State Authorities |
| National Association of Clean Water Agencies | 3 | $309K | New York City |
| National Association of Government Defined Contribution Administrators, Inc | 3 | $2K | Oregon State Treasury |
| National Association of Public Pension Attorneys | 4 | $4K | Oregon State Treasury |
| National Association of State Auditors, Comptrollers and Treasurers | 6 | $19K | Oregon State Treasury |
| National Association of State Investment Officers | 3 | $8K | Oregon State Treasury |
| National Association of State Treasurers | 85 | $675K | Oregon State Treasury |
| National Association On Drug Abuse Problems (NYS) | 5 | $74M | New York City |
| National Breaker Services, LLC | 3 | $197K | MTA Procurements |
| National Claim Evaluations Inc | 4 | $260K | New York City |
| National Coalition of 100 Black Women, I | 3 | $187K | San Francisco |
| National Collegiate Inventors & Innovators Alliance, Inc. | 4 | $2.3M | National Institutes of Health |
| National Committee for Quality Assurance | 11 | $43M | Centers for Medicare and Medicaid Services |
| National Compressor Exchange | 8 | $8.2M | MTA Procurements |
| National Contract Management Association | 7 | $892K | Federal Acquisition Service |
| National Contracting Services, LLC | 7 | $2.7M | Department of the Army |
| National Council of Real Estate Investment Fiduciaries | 3 | $4K | Oregon State Treasury |
| National Electric Gate Company Inc | 3 | $316K | NY State Authorities |
| National Electrical Carbon Products Inc | 16 | $4.0M | MTA Procurements |
| National Elevator Inspection Services, Inc | 3 | $216K | Public Buildings Service |
| National Environmental Inc | 5 | $180K | Indian Health Service |
| National Equipment Dealers, LLC | 4 | $3K | City of Mesquite |
| National Fire Protection Association | 5 | $273K | New York City |
| National Funds | 8 | $8K | City of Los Angeles Controller |
| National Grid Energy Management, LLC | 9 | $7.1M | MTA Procurements |
| National Grid - LI | 4 | $11M | NY State Authorities |
| National Grid - NY | 3 | $5.4M | NY State Authorities |
| National Industries for the Blind | 57 | $48M | Federal Acquisition Service |
| National Industries for the Blind (NIB) | 5 | $397K | NY State Authorities |
| National Institute for Public Procurement | 13 | $4K | Oregon State Treasury |
| National Institute of Building Sciences | 8 | $21M | Department of the Air Force |
| National Instruments Corp | 6 | $2.0M | Department of the Air Force |
| National Louis University | 7 | $1.1M | City of Chicago |
| National Machine Company | 15 | $2.9M | Defense Logistics Agency |
| National Medical Services, Inc. | 4 | $4.5M | New York City |
| National Museum of Mexican Art | 4 | $498K | City of Chicago |
| National Museum of Puerto Rican Arts & Culture | 3 | $185K | City of Chicago |
| National Native American Construction, Inc. | 5 | $3.9M | Department of the Army |
| National Notary Association | 3 | $177 | Oregon State Treasury |
| National Opinion Research Center | 21 | $229M | Centers for Medicare and Medicaid Services |
| National Parts Corporation | 5 | $11K | City-Parish of Baton Rouge |
| National Public Housing Museum | 5 | $1.8M | City of Chicago |
| National Railroad Passenger Corp | 19 | $275M | NY State Authorities |
| National Railway Supply LLC | 39 | $2.4M | MTA Procurements |
| National Society of Compliance Professionals (NSCP) | 7 | $5K | Oregon State Treasury |
| National Strategic Research Institute | 8 | $32M | Department of the Air Force |
| National Test Pilot School Inc | 5 | $3.8M | Department of the Air Force |
| National Traffic Safety Institute Corporation | 3 | $930K | New York City |
| National Waste Services LLC | 6 | $13M | NY State Authorities |
| National Water Main Cleaning Co. | 4 | $25M | New York City |
| National Wholesale Supply, Inc. | 17 | $2K | City of Mesquite |
| Nationwide Auto Painting Inc | 19 | $16M | MTA Procurements |
| Nationwide Central Station Monitoring Co | 3 | $89K | MTA Procurements |
| Nationwide Chemical Co Inc | 9 | $716K | MTA Procurements |
| Nationwide Power Solutions Inc | 3 | $118K | Department of Veterans Affairs |