America's Most Promising Companies: Top 20

The fortunes of younger, privately held firms can change very quickly

What if someone told you the most promising company in America aimed to compete with multiple multibillion-dollar giants in a traditional industry with un-software-like profit margins? Then what if they told you that the same company had clocked explosive growth through the deepest recession in recent memory — and it was just getting started?

Meet Smashburger, tops on our new list of America’s 100 Most Promising Companies — privately held up-and-comers with compelling business models, strong management teams, notable customers, strategic partners and precious investment capital. Since 2007, the Denver-headquartered patty chain will have grown to 143 locations (half company-owned, half franchised) and $54 million in annual revenue by the end of 2011. Another 450 franchise agreements are already on the books.

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