shares of ideaya biosciences inc fell more than 10 in premarket trading thursday after the precisionmedicine oncology company raised 80 million in a public stock offering the south san francisco calif company said the offering of about 762 million shares was priced at 1050 each 16 below wednesdays closing price of 1251 ideaya which had about 393 million shares outstanding before the offering said it plans to use proceeds from the offering for researchanddevelopment activities ideaya shares which had rallied this week after the company reported positive interim study data were recently down 12 to 11 in light premarket trading