1. W.W. Grainger
2. Airgas, Air Liquide
3. HD Supply
4. Motion Industries
5. The Fastenal Company
6. Amazon Business
7. MRC Global Corp.
8. Winsupply
9. McMaster-Carr
10. MSC Industrial Supply
11. NOW Inc. (DistributionNOW)
12. SupplyWorks
13. Applied Industrial Technologies
14. Wurth - Americas
15. The United Distribution Group
16. Wolseley Industrial Group
17. Vallen Distribution
18. F.W. Webb
19. Kaman Distribution Group
20. DXP Enterprises
Top 10 Electrical Distributors
1. Sonepar North America
2. WESCO International
3. Graybar
4. Anixter International Inc.
5. Rexel Holdings USA/Rexel Canada
6. Consolidated Electrical Distributors (CED)
7. Border States Electric
8. Crescent Electric Supply Company
9. City Electric Supply
10. W.W. Grainger (electrical/lighting)