1. Amazon $34.2 billion

2. 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