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Registry · NAICS Index

Sector 42 — Wholesale Trade

Reference listings and standards for industries classified under NAICS Sector 42. Select a national industry below for SBA size bounds and SIC mappings.

Top Industries & SBA Standards under Sector 42

Code Industry Title SBA Size Standard
423110 Automobile and Other Motor Vehicle Merchant Wholesalers 250 employees
423120 Motor Vehicle Supplies and New Parts Merchant Wholesalers 200 employees
423130 Tire and Tube Merchant Wholesalers 200 employees
423140 Motor Vehicle Parts (Used) Merchant Wholesalers 125 employees
423210 Furniture Merchant Wholesalers 100 employees
423220 Home Furnishing Merchant Wholesalers 100 employees
423310 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers 150 employees
423320 Brick, Stone, and Related Construction Material Merchant Wholesalers 150 employees
423330 Roofing, Siding, and Insulation Material Merchant Wholesalers 225 employees
423390 Other Construction Material Merchant Wholesalers 100 employees

💡 Sector Guidance

Sector Selection Rule: When registering your business profile on SAM.gov or state registers, you must declare a single primary NAICS code representing your largest source of revenue. While you can add multiple secondary codes from Sector 42 (Wholesale Trade) to showcase your full capability list, only one primary code dictates your macro size eligibility.

National Industries in this Sector (69)

423110 Automobile and Other Motor Vehicle Merchant Wholesalers
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423120 Motor Vehicle Supplies and New Parts Merchant Wholesalers
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423130 Tire and Tube Merchant Wholesalers
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423140 Motor Vehicle Parts (Used) Merchant Wholesalers
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423210 Furniture Merchant Wholesalers
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423220 Home Furnishing Merchant Wholesalers
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423310 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers
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423320 Brick, Stone, and Related Construction Material Merchant Wholesalers
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423330 Roofing, Siding, and Insulation Material Merchant Wholesalers
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423390 Other Construction Material Merchant Wholesalers
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423410 Photographic Equipment and Supplies Merchant Wholesalers
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423420 Office Equipment Merchant Wholesalers
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423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers
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423440 Other Commercial Equipment Merchant Wholesalers
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423450 Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
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423460 Ophthalmic Goods Merchant Wholesalers
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423490 Other Professional Equipment and Supplies Merchant Wholesalers
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423510 Metal Service Centers and Other Metal Merchant Wholesalers
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423520 Coal and Other Mineral and Ore Merchant Wholesalers
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423610 Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
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423620 Household Appliances, Electric Housewares, and Consumer Electronics Merchant Wholesalers
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423690 Other Electronic Parts and Equipment Merchant Wholesalers
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423710 Hardware Merchant Wholesalers
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423720 Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
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423730 Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
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423740 Refrigeration Equipment and Supplies Merchant Wholesalers
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423810 Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers
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423820 Farm and Garden Machinery and Equipment Merchant Wholesalers
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423830 Industrial Machinery and Equipment Merchant Wholesalers
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423840 Industrial Supplies Merchant Wholesalers
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423850 Service Establishment Equipment and Supplies Merchant Wholesalers
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423860 Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
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423910 Sporting and Recreational Goods and Supplies Merchant Wholesalers
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423920 Toy and Hobby Goods and Supplies Merchant Wholesalers
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423930 Recyclable Material Merchant Wholesalers
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423940 Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers
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423990 Other Miscellaneous Durable Goods Merchant Wholesalers
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424110 Printing and Writing Paper Merchant Wholesalers
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424120 Stationery and Office Supplies Merchant Wholesalers
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424130 Industrial and Personal Service Paper Merchant Wholesalers
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424210 Drugs and Druggists' Sundries Merchant Wholesalers
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424310 Piece Goods, Notions, and Other Dry Goods Merchant Wholesalers
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424340 Footwear Merchant Wholesalers
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424350 Clothing and Clothing Accessories Merchant Wholesalers
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424410 General Line Grocery Merchant Wholesalers
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424420 Packaged Frozen Food Merchant Wholesalers
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424430 Dairy Product (except Dried or Canned) Merchant Wholesalers
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424440 Poultry and Poultry Product Merchant Wholesalers
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424450 Confectionery Merchant Wholesalers
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424460 Fish and Seafood Merchant Wholesalers
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424470 Meat and Meat Product Merchant Wholesalers
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424480 Fresh Fruit and Vegetable Merchant Wholesalers
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424490 Other Grocery and Related Products Merchant Wholesalers
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424510 Grain and Field Bean Merchant Wholesalers
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424520 Livestock Merchant Wholesalers
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424590 Other Farm Product Raw Material Merchant Wholesalers
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424610 Plastics Materials and Basic Forms and Shapes Merchant Wholesalers
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424690 Other Chemical and Allied Products Merchant Wholesalers
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424710 Petroleum Bulk Stations and Terminals
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424720 Petroleum and Petroleum Products Merchant Wholesalers (except Bulk Stations and Terminals)
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424810 Beer and Ale Merchant Wholesalers
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424820 Wine and Distilled Alcoholic Beverage Merchant Wholesalers
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424910 Farm Supplies Merchant Wholesalers
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424920 Book, Periodical, and Newspaper Merchant Wholesalers
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424930 Flower, Nursery Stock, and Florists' Supplies Merchant Wholesalers
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424940 Tobacco Product and Electronic Cigarette Merchant Wholesalers
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424950 Paint, Varnish, and Supplies Merchant Wholesalers
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424990 Other Miscellaneous Nondurable Goods Merchant Wholesalers
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425120 Wholesale Trade Agents and Brokers
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Frequently Asked Questions

What is NAICS Sector 42? ▾

Sector 42 represents 'Wholesale Trade' in the North American Industry Classification System (NAICS) taxonomy. It groups establishments based on their shared production processes and operational inputs.

How many U.S. national industries are listed under NAICS Sector 42? ▾

There are exactly 69 6-digit U.S. national industries listed under NAICS Sector 42 in our registry, compiled from the active 2022 Census NAICS manual.

What is the hierarchical structure under Sector 42? ▾

Economic activities in Sector 42 are organized hierarchically: the first two digits designate Sector 42, which rolls down into 3-digit subsectors, 4-digit industry groups, 5-digit NAICS industries, and 6-digit national industries.

What type of business activities belong to Sector 42? ▾

Sector 42 covers establishments engaged in 'Wholesale Trade'. Select any specific six-digit industry code from the directory list to see detailed definitions and examples.

How do I determine the SBA size standard for codes in Sector 42? ▾

Each industry in Sector 42 has its own specific size standard limit set by the SBA. You must check the individual six-digit industry page to see if it is a receipts-based limit or employee-based limit.

Do Sector 42 industries map to legacy SIC codes? ▾

Yes, every six-digit industry in Sector 42 maps to one or more legacy four-digit SIC codes. The concordance crosswalk handles splits to map legacy files to modern formats.

What are the common IRS Principal Business Activity codes for this sector? ▾

The IRS Principal Business Activity (PBA) codes for Sector 42 are derived directly from these NAICS classifications and must be listed on federal tax returns to group business income.

Is a NAICS code in Sector 42 state-specific? ▾

No, all NAICS classifications in Sector 42 are federal standards uniform across all 50 states, ensuring consistent statistics and compliance.

Sources & References

  1. U.S. Census Bureau: North American Industry Classification System (NAICS) Manual
  2. U.S. Small Business Administration (SBA): Table of Small Business Size Standards
  3. Electronic Code of Federal Regulations (eCFR): 13 CFR Part 121 - Small Business Size Regulations
  4. Acquisition.gov: Federal Acquisition Regulation (FAR) Part 19 - Small Business Programs
  5. Internal Revenue Service (IRS): Instructions for Schedule C (Form 1040) Principal Business Activity (PBA) Codes
  6. U.S. General Services Administration (GSA): System for Award Management (SAM.gov) Unique Entity ID Guide
  7. Defense Logistics Agency: Defense Logistics Agency (DLA) CAGE Search and Registration
  8. United Nations Statistics Division: International Standard Industrial Classification of All Economic Activities (ISIC)
  9. U.S. Occupational Safety and Health Administration (OSHA): Standard Industrial Classification (SIC) Manual
  10. U.S. Securities and Exchange Commission (SEC): SEC EDGAR Filer Standard Industrial Classification Codes