The Top 25

A stunning 37 of this year's fast-growers come from the energy sector, and metals companies make a strong showing, too, thanks to high commodities prices. Meanwhile, other seemingly fleeting trends - like energy drinks - proved to have surprising staying power. We evaluate each company based on three years of revenue and profit growth as well as total return.

15 of the companies on this year's list are also big enough to rank on the FORTUNE 500. (more)

Texas is home to the most companies on this year's list. See the fastest-growing companies near you (including interactive maps). (more)

Americans' bulging waistlines have helped push this 35-year-old diet company to the top of Fortune's list this year. (more)

The firms listed here also appeared on Business 2.0's list of 100 Fastest-Growing Tech Companies. (more)