NEW YORK ( Stockpickr) -- Here's a curious stat: Of the 1,500 companies that make up the S&P 400, S&P 500 and S&P 600 (which are the key indices for mid-caps, large-caps and small-caps, respectively), exactly 1%, or 15 of them, can boast of forecasted sustained strong sales growth. Each of these companies is expected to boost sales at least 20% in 2012, 2013 and again in 2014.Defying the gravity of a slow economy, these companies are managing to boost market share in their existing markets or are venturing into new markets for growth. If the global economy is on firmer footing, then these companies may be able to maintain that growth streak into 2015 and beyond. Here are seven companies that are poised for strong growth ahead, according to the analysts that track them. >>5 Big Stocks Ready to Slingshot Higher Amazon.com No story about high-growth stocks is complete without e-tailing giant Amazon.com ( AMZN). When's the last time that Amazon failed to grow at a 20% pace? We're not sure. Our records don't go back that far but we know it was at least 15 years ago. The remarkable notion is that with $48 billion in sales last year, there is so much growth still ahead: Analysts think Amazon's sales will top $100 billion by 2014. In recent quarters, investors have grown annoyed that Amazon's sales are growing faster than profits. Earnings per share are likely to fall roughly 10% this year even as sales rise 30%. Yet analysts think that Amazon's current investments will reap big profits later. For example, EPS is expected to more than double next year to around $2.50 a share, and Reuters notes that the EPS forecast for 2015 exceeds $5. Amazon also shows up on a recent list of 5 Stocks to Buy if They Crash on Earnings. Rackspace Holdings As companies grow larger, their internal computer networks grow exponentially more complex. Trouble is, finding good IT (information technology) staffers can be challenge, and as a result, many of these IT departments remain understaffed. Rackspace Holdings ( RAX) can relieve the pressure. The firm provides outsourced management of corporate networks, dealing with all of the hardware and software challenges that pop up. Rackspace has become an especially important vendor, now that so much data lies "out in the cloud" and no longer resides in companies' computer storage closets.