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