John Martin Mirko, Executive, Ten Percent Owner at Rokmaster Resources, holds 6.47M shares in Rokmaster Resources (Ticker: TSE:RKR), holds 1.42M shares in Roca Mines (Ticker: ROCAF). Most recently, John Martin Mirko Bought ― shares of Rokmaster Resources on Nov 12, 2020 for an estimated value of 25.62K.