7. American International Group
Jobs lost: 20,000
% drop (1 year): 17%
Remaining employees*: 96,000
Fortune 500 rank: 16
After suffering the biggest loss of any Fortune 500 company in history (of $99 billion in 2008, the same year it received a $182 billion government bailout), AIG reduced headcount by an additional 20,000 jobs in 2009 as it sold off a number of its insurance businesses. But despite the sales, the company remained in the red with a loss of $10.9 billion last year.
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Last updated May 13 2010: 9:10 AM ET
* Full-time equivalent employees as of the end of 2009
