9 of 23
9. Merck
9. Merck
2010 Fortune 500 rank: 85
2009 profit growth: 65.2%
2009 revenue growth: 15.0%

CEO since 2005: Richard T. Clark

Bolstered by the $41 billion acquisition of Schering Plough and strong sales of Singulair (to treat allergies and asthma) and its hypertension and diabetes drugs, Merck posted a healthy increase in both revenues (up 15%, to $27.4 billion) and earnings (up 65%, to $12.9 billion) in 2009.

This year, Merck CEO Richard Clark has a bitter pill to swallow: patents on two hypertension drugs and a brain tumor treatment - which together bring in about $3 billion annually - are set to expire.

NEXT: 10. O'Reilly Automotive

Email | Print | Share
google my aol my msn my yahoo! netvibes
Paste this link into your favorite RSS desktop reader
See all CNNMoney.com RSS FEEDS (close)
Last updated April 28 2010: 12:37 PM ET
Top 50 Wal-Mart knocks Exxon Mobil out of the No. 1 slot to rule the Fortune 500 again. Which other companies made the top 50 this year? More
They're hiring! These Fortune 100 employers have at least 200 openings each, totaling more than 60,000 jobs. What are they looking for in a new hire? More
The biggest losers Companies from Fannie Mae to RiteAid, and Citigroup to Sprint lost billions of dollars last year. Who lost the most? More