According to the ETF Finder at ETF Channel, DDD makes up 2.59% of the First Trust Technology AlphaDEX Fund ETF (FXL) which is up by about 0.1% on the day Wednesday.
In afternoon trading Wednesday, DDD was up about 2.2% on the day.
3D Systems (DDD) beat bottom-line expectations, but missed top-line estimates.
U.S. stock futures and shares in Europe and Asia trade mixed Tuesday ahead of Donald Trump's first speech to a joint session of Congress.
The Federal Reserve's meeting in March creeps closer, but markets remain skeptical that a rate hike will come so soon.