Here are the 20 companies among the 278 we screened in the S&P 500 that showed the largest increases in quarterly sales per share, while also improving gross and operating margins from a year earlier.

For patient investors, the promise of solar may one day produce sizable investment returns. Learn about the best solar stocks ...

Shares of Enphase Energy Inc. ENPH slid 2.33% to $61.12 Wednesday, on what proved to be an all-around poor trading session ...