** Akeso 9926.HK falls 7.5 to HK$145.2; set for biggest one-day pct drop since August 7
** Stock hits lowest since August 4; set for fourth straight session of decline
** Antibody drugs developer and manufacturer to sell 23.55 mln shares, or 2.56% of enlarged share capital, to third party investors via share placement, raising HK$3.52 bln ($450.6 mln) for R&D, infra building, products commercialisation
** Issue price of HK$149.54 represents 4.75% discount to Wednesday's close
** Key shareholders Xia Yu, Li Baiyong planning to sell 3 mln existing shares at same price to third party investors
** YTD, stock surges ~148%
($1 = HK$7.8113)
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))