| The 45 National American Industry Classification System (NAICS) codes in which WOSBs are underrepresented are: |
| 2213 - Water, Sewage and Other systems |
| 2361 - Residential Building Construction |
| 2371 - Utility System Construction |
| 2381 - Foundation, Structure, and Building Exterior Contractors |
| 2382 - Building Equipment Contractors |
| 2383 - Building Finishing Contractors |
| 2389 - Other Specialty Trade Contractors |
| 3149 - Other Textile Product Mills |
| 3159 - Apparel Accessories and Other Apparel Manufacturing |
| 3219 - Other Wood Product Manufacturing |
| 3222 - Converted Paper Product Manufacturing |
| 3321 - Forging and Stamping |
| 3323 - Architectural and Structural Metals Manufacturing |
| 3324 - Boiler, Tank, and Shipping Container Manufacturing |
| 3333 - Commercial and Service Industry Machinery Manufacturing |
| 3342 - Communications Equipment Manufacturing |
| 3345 - Navigational, Measuring, Electromedical, and Control Instruments Manufacturing |
| 3346 - Manufacturing and Reproducing Magnetic and Optical Media |
| 3353 - Electrical Equipment Manufacturing |
| 3359 - Other Electrical Equipment and Component Manufacturing |
| 3369 - Other Transportation Equipment Manufacturing |
| 4842 - Specialized Freight Trucking |
| 4881 - Support Activities for Air Transportation |
| 4884 - Support Activities for Road Transportation |
| 4885 - Freight Transportation Arrangement |
| 5121 - Motion Picture and Video Industries |
| 5311 - Lessors of Real Estate |
| 5413 - Architectural, Engineering, and Related Services |
| 5414 - Specialized Design Services |
| 5415 - Computer Systems Design and Related Services |
| 5416 - Management, Scientific, and Technical Consulting Services |
| 5419 - Other Professional, Scientific, and Technical Services |
| 5611 - Office Administrative Services |
| 5612 - Facilities Support Services |
| 5614 - Business Support Services |
| 5616 - Investigation and Security Services |
| 5617 - Services to Buildings and Dwellings |
| 6116 - Other Schools and Instruction |
| 6214 - Outpatient Care Centers |
| 6219 - Other Ambulatory Health Care Services |
| 7115 - Independent Artists, Writers, and Performers |
| 7223 - Special Food Services |
| 8111 - Automotive Repair and Maintenance |
| 8113 - Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance |
| 8114 - Personal and Household Goods Repair and Maintenance |
