The 5000 companies that made the list reported aggregate revenue of $185 billion and median three-year growth of 147 percent. Most important, the 2008 Inc. 5000 companies were engines of job growth, having created more than 826,033 jobs since those companies were founded. Complete results of the Inc. 5000, including company profiles and a list of the fastest-growing companies that can be sorted by industry and region can be found at www.inc5000.com.

"Our second annual Inc. 5000 continues the most ambitious project in business journalism," said Inc. 5000 Project Manager Jim Melloan. "The Inc. 5000 gives an unrivalled portrait of young, underreported companies across all industries doing fascinating things with cutting-edge business models, as well as older companies that are still showing impressive growth."

The New York metro area tops the Inc. 5000 list with the most companies of any city with 355. Washington, D.C. comes in a close second with 300 companies on the list; Los Angeles comes in third with 244 companies, and Atlanta (194 companies) and Chicago (189 companies) round out the top five. Interestingly, only 62 companies on the Inc. 5000 are not based in metropolitan areas.

Grand Rapids, Mich. leads the list with the highest median revenue of any metro area ($26.2 million, 16 companies), followed by San Antonio, Texas ($21.3 million, 25 companies), Baton Rouge, La. ($18.8 million, 14 companies), Houston ($17.1 million, 97 companies), and Kansas City, Mo.-Kan. ($16.5 million, 39 companies).

The most notable median growth categories among the Inc. 5000 fastest-growing businesses are in the Energy category (which grew by 298%), followed by Government Services (which grew by 220%), Security (200% growth), IT Services and Software (both grew by 187%), and Consulting (which grew by 182% on average).

The largest business category is IT Services, with 579 Inc. 5000 companies. Business Services (532 companies), Construction (459), Manufacturing (405), and Advertising & Marketing (361) complete the top five industries ranked on the 2008 Inc. 5000.

Industries reporting the highest median revenue are Travel ($38.8 million), Financial Services ($16.3 million), Logistics ($15.4 million) Government Services ($14.2 million), and Energy ($14.2 million).

The Inc. 5000 list tends to capture larger, more mature companies, some with revenues well into the billions. In fact, this year's list includes the largest company ever to make an Inc. 500 or Inc. 5000 list, the global construction firm CH2M Hill, with $5.8 billion in 2007 revenue. Among many other things, CH2M Hill is helping build Masdar City, the world's first zero-carbon, zero-waste city, in Abu Dhabi. The chart below highlights some of the Inc. 5000's biggest players.