20 of 20
BACKNEXT
20. EMC
Fortune 500 rank: 152
2010 revenue: $17.0 billion
10-year annualized return: -9.9%

EMC's stock fell prey to Mr. Market's unrealistic expectations. During the tech bubble, shares doubled in just six months -- a run-up that the network storage company's prospects never truly justified.

Recently its chief business of data storage has become popular again with investors, and EMC's 80% stake in fast-growing VMware has been a boon -- just not a big enough one for those who have owned EMC stock for a decade.   



More galleries
Last updated May 05 2011: 2:52 PM ET
Top 50 Wal-Mart holds Exxon Mobil at bay and rules the Fortune 500 for the second year in a row. Which other companies made the top 50? More
They're hiring! These Fortune 100 employers have at least 350 openings each, totaling more than 96,000 jobs. What are they looking for in a new hire? More
20 most profitable Exxon Mobil rode high oil prices to a staggering $30 billion in profits. From Apple to Google, here are the other big winners. More