Stratasys Sales Up...3D Systems Down, New Data Shows By: Benzinga via Benzinga October 13, 2015 at 10:38 AM EDT In 2015, shares of Stratasys, Ltd. (NASDAQ: SSYS) have declined 63 percent, while 3D Systems Corporation (NYSE: DDD) dipped 60 percent. ... Read More >> Related Stocks: 3D Systems Corp Bio-Techne Corp Stratasys Ltd