These companies are growing revenue -- and seeing strong demand.The stock market is roaring higher, and many growth stocks have benefited from this positive momentum. The S&P 500 index confirmed the bull market earlier this year when it reached a record -- and it's reached new records since.Even after the gains, some of this year's winning stocks still make great investments as they could climb further and their long-term prospects are bright. But it's important to keep an eye on growth stocks that haven't ...