NEW YORK, June 15, 2022 (GLOBE NEWSWIRE) -- OTC Markets Group Inc. (OTCQX: OTCM), operator of regulated markets for 12,000 U.S. and international securities, today announced Summa Silver Corp. (TSX-V: SSVR; OTCQX: SSVRF), a Canadian junior mineral exploration company, has qualified to trade on the...
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