Amazon.com

No. 23

Industry: Internet Retail
Sales: $19.2 billion
Net Income: $645 million

Retail giants Circuit City and Linens 'n Things might be disappearing into bankruptcy, but Amazon.com (AMZN) just keeps racking up sales and market share. During last year's dismal fourth quarter, revenues jumped 18% while traditional retailers dropped 1.7%. Credit CEO Jeffrey P. Bezos' unrelenting focus on slashing prices, expanding selection, and making shopping online ever easier. Last year, Amazon distributed millions more products for retail partners and expanded its Web services, which let companies use its massive tech infrastructure. In February, it released its updated Kindle 2 e-book reader.

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