SUMCO (OTCMKTS:SUOPY – Get Free Report) posted its earnings results on Thursday. SUMCO Trading Down 11.2%SUMCO stock traded down $5.30 during trading hours on Thursday, hitting $42.00. Get SUMCO alerts:About SUMCO(Get Free Report)SUMCO Corporation (OTCMKTS: SUOPY) is a premier global supplier of silicon wafers, a foundational material used in the fabrication of semiconductor devices. Founded in 1975 as a spin-off from Mitsubishi Silicon, SUMCO has grown through strategic investments in research and development to advance wafer quality, diameter scaling and defect reduction. Featured StoriesReceive News & Ratings for SUMCO Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for SUMCO and related companies with MarketBeat.com's FREE daily email newsletter.