Canadian mining companies dominate 2017 OTCQX Best 50 ranking The #1 ranked company was Cordoba Minerals Corp, a Toronto-based mineral exploration company, which had a total return of 466%. OTC Markets Group Inc. | February 3, 2017 | 2:53 pm
Vancouver’s NexGen Energy begins trading on OTCQX market OTC Markets Group Inc. today announced NexGen Energy Ltd. a uranium exploration and development company, has qualified to trade on the OTCQX® Best Market. OTC Markets Group Inc. | August 25, 2015 | 5:23 am