O3 Mining Inc. engages in the acquisition, exploration, and development of precious metal resource properties in Canada. It primarily explores for gold deposits. The company's flagship properties include Marban property, which covers 223 mining claims approximately 9,238 hectares located in Val-d'Or, Québec, Canada; and the Alpha property, which covers 7,754 hectares located in Val-d'Or, Québec. It has an option to acquire a 100% interest in the Emgold's East-West property consisting of seven mining claims covering an area of 184 hectares situated in the Val-d'Or mining camp in Québec; and holds 100% interest in the Siscoe East property located in the Vassan Township in the Abitibi-Témiscamingue region of Québec. O3 Mining Inc. is headquartered in Toronto, Canada. Address: 155 University Avenue, Toronto, ON, Canada, M5H 3B7