1. Amazon$34.2 billion2. Staples$10.2 billion
3. Apple$5.2 billion
4. Dell$4.8 billion
5. Office Depot$4.1 billion
6. Wal-Mart$4.1 billion
7. Sears$3.1 billion
8. Liberty Media$3 billion
9. OfficeMax$2.9 billion
10. CDW Corp.$2.7 billion
Minnesota retailers
11. Best Buy$2.5 billion
22. Target$1.3 billion
Source: Internet Retailer, using 2010 sales