** U.S.-listed shares of Canada's Osisko Development ODV.N tumble 11.9% in premarket trading to $2.59, a nine-month low, on capital raise

** Montreal-based gold producer early Thurs announced pricing private offering of $275 mln 4.125% convertible bonds (CBs) due 2031

** Osisko affiliate Double Zero Capital purchasing $50 mln of the CBs in concurrent private placement

** Initial conversion price of $3.68 is 25% premium to shares last sale of $2.94 on Weds

** Co intends to use net offering proceeds to fund development of Cariboo Gold Project in British Columbia province, and for general corp purposes

** It expects to use approx $36.9 mln to fund capped calls, derivative transactions to offset potential dilution

** Osisko has roughly $800 mln market cap

** Through Weds close, U.S.-listed shares lost 16% YTD