** Hong Kong shares of WuXi AppTec 2359.HK fall 6.9% to HK$104.3, on track for the biggest one-day pct drop since April 7

** Stock on course to snap seven straight sessions of gains

** Shanghai-listed stock 603259.SS falls 4% to 94.92 yuan, on track to snap 10 consecutive sessions of gains

** Co says it will be raising HK$7.70 billion ($980.98 million) through a share placement

** Chinese biotechnology giant will place 73.8 million new H shares at a price of HK$104.27 per share, a 6.9% discount to Wednesday's close of HK$112, raising proceeds to accelerate global expansion and capacity construction

** The Hang Seng Biotech Index .HSHKBIO slips 0.1%, the benchmark Hang Seng Index .HSI falls 1.4%

** YTD, co's Hong Kong shares up 50%, Shanghai stock up 75.1%

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))