Phoenix—McMurry is one of the 5,000 fastest-growing private companies in the country, according to annual rankings recently announced by Inc.com, the online arm of Inc. magazine. The list is the most comprehensive look at the most important segment of the economy—America’s independent-minded entrepreneurs. McMurry is ranked No. 3,173, with revenue growth of 108.9 percent from 2004 ($21.6 million) to 2007 ($45 million).