Bernardo Alvarez Calderon, Director at Osisko Mining, holds 53.66K shares in O3 Mining (Ticker: OQMGF), holds 15.23K shares in Osisko Mining (Ticker: OBNNF). Most recently, Bernardo Alvarez Calderon Bought ― shares of O3 Mining on Sep 19, 2020 for an estimated value of 43.50K.