Benzinga's Top #PreMarket Gainers

Cyan Inc CYNI shares rose 28.49 percent to $4.69 in pre-market trading after the company agreed to be acquired by Ciena Corporation CIEN for around $4.75 per share. Array Biopharma Inc ARRY shares surged 12.66 percent to $7.12 in pre-market trading following strong earnings report. Array BioPharma reported Q3 earnings of $0.37 per share on revenue of $6.6 million. Cognizant Technology Solutions Corp CTSH gained 4.84 percent to $62.00 in pre-market trading after the company reported better-than-expected results for its first quarter and raised its outlook for the year. ON Semiconductor Corp ON shares climbed 4.49 percent to $12.34 in pre-market trading after the company reported better-than-expected Q1 earnings. Immunomedics, Inc. IMMU shares gained 4.42 percent to $4.02 in the pre-market trading session. Immunomedics is expected to report Q3 results on Thursday, May 7, 2015.