NEW YORK, April 30, 2026 (GLOBE NEWSWIRE) -- OTC Markets Group Inc. (OTCQX: OTCM), operator of regulated markets for trading 12,000 U.S. and international securities, today announced Stanmore Resources Limited (ASX:SMR; OTCQX: STMRF), an Australian metallurgical coal mining company, has qualified to trade on the OTCQX® Best Market. Stanmore Resources Limited upgraded to OTCQX from the Pink Limited™ Market. Stanmore Resources Limited begins trading today on OTCQX under the symbol “STMRF.” U.S. investors can ...