Studeo has been named to the 23rd annual Inc. 500 list of the nation's fastest-growing private companies. The list ranks companies according to averaged growth over the past four years. To be eligible, companies must be independent and privately held. They must have an operating history of at least four years and they must have net sales of $200,000 in fiscal 2000 and $2 million in revenue for fiscal 2003. Studeo ranked 474th in its debut on the list, with $41.8 million in revenue and average annual sales growth of 77 percent.