Proto Labs
Western Refining

This year's Fastest-Growing Companies marks the 19th running of the list.

See our methodology and credits



To qualify, a company-domestic or foreign-must be trading on a major U.S. stock exchange; report data in U.S. dollars; file quarterly reports with the SEC; have a minimum market capitalization of $250 million and a stock price of at least $5 on June 30, 2015; and have been trading continuously since June 30, 2012. Companies must have revenue and net income for the four quarters ended on or before April 30, 2015, of at least $50 million and $10 million, respectively; and have posted an annualized growth in revenue and earnings per share of at least 15% annually over the three years ended on or before April 30, 2015.

Companies that meet these criteria are ranked by revenue growth rate; EPS growth rate; and three-year annualized total return for the period ended June 30, 2015. (To compute the revenue and EPS growth rates, Fortune uses a trailing four quarters log linear least square regression fit.)

The overall rank is based on the sum of the three ranks. Once the 100 companies are identified, they are then re-ranked within the 100, using the three equally weighted variables. If there is a tie, the company with the larger four-quarter revenue receives the higher rank.

Excluded are real estate investment trusts, limited liability companies, limited partnerships, business development companies, closed end investment firms, companies about to be acquired, and companies that lost money in the quarter ended on or before April 30, 2015. In addition, Fortune excludes companies that have announced intentions to restate previously reported financial data, if these errors appear to have a significant impact. Also, Fortune excludes companies that lost money in the quarter ended May 31 or June 30, if the loss represents a deterioration in business conditions. The data are provided by Zacks Investment Research. The data checking process was aided by information provided by S&P Capital IQ, Hoover’s, FactSet Research Systems, and Morningstar Document Research.

—By Scott DeCarlo, Douglas G. Elam, Orlaith Farrell, Vivian Giang, Kathleen Smyth

This year's Fastest-Growing Companies marks the 19th running of the list. In our annual list of public companies with the most stellar three-year profit, revenue, and stock growth, Facebook makes its first appearance.

See our methodology and credits


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Chicago Bridge & Iron

Last year's Rank: 70

Energy production may be slowing, but this designer and builder of infrastructure still had an order backlog worth $30 billion as of the end of 2014.

Company Information

Location The Hague, Netherlands
Industry Engineering & Construction
Sector Industrial
Fortune 500 Rank -
Fortune 500 Profile -
Current Streak 2
Years on List 2
CEO Philip K. Asherman

Revenue, Net Income

$ millions
Revenue Past Four Quarters 13173
Net Income Past Four Quarters 587

Growth Rates

EPS 3 yr Annual Growth Rate 30%
Rev 3 yr Annual Growth Rate 48%
Total Return 3 yr Annual Rate 10%
Beat S&P 3 yr Total Return?


EPS Growth Rank 81
Revenue Growth Rank 13
Total Return Rank 97
Fortune's Take On Chicago Bridge & Iron
  • Toshiba Just Logged Its Third Day of Heavy Losses
    Ratings agencies have been quick to respond.
  • Toshiba Reports Its First Profit in 6 Quarters
    After its 2015 accounting scandal triggered a major restructuring.
  • Warren Buffett's investing successors blew it in 2014
    Stock picks like General Motors and Viacom didn't pan out for Berkshire Hathaway's Ted Weschler and Todd Combs.
  • Companies are paying up for deals
    Premiums on M&A transactions are at an 11-year high.
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