DDD - 3D Systems among tech gainers C3 AI joins decliners in first half of 2021

Vertigo3d/E+ via Getty Images Marin Software (MRIN) was among the top tech gainers in the first half of the year with shares up 416% during the period. Shares have gained 527% just in the past week as the company announced an Instacart Ads integration and became a growing topic on social media sites like Reddit's WallStreetBets forum.  SilverSun Technologies (SSNT) was up 310% after signing a letter of intent in February to acquire CT-Solution, a reseller of Sage Software solutions.  3D printing giant 3D Systems (DDD) gained about 294% in the first half. The company has increased its focus on the healthcare vertical. In May, 3D acquired bioprinting company Allevi. Last week, 3D Systems and CollPlant announced a co-development agreement to bioprint soft tissue matrix for use in breast reconstruction procedures.  Cathie Wood's ARK funds also picked up 3D shares during the period.  On the decliners side, Qumu (QUMU) was among the

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3D Systems among tech gainers, C3 AI joins decliners in first half of 2021