Cornerstone Metals Inc. Upgrades to OTCQX® Best Market Cornerstone Metals Inc. Upgrades to OTCQX® Best Market September 4, 2018 ‐ Vancouver, British Columbia – Cornerstone Metals Inc. (TSX‐V: CCC) (OTCQX: CCCCF) (FSE: 1PY) (“Cornerstone” or the “Company”) is pleased to announce that it has qualified to trade on the OTCQX® Best Market in the United States. The Company has upgraded to the OTCQX® Best Market from the OTCQB® Venture Market. “We are pleased to transition to the OTCQX Best Market, where we can build onto our visibility and liquidity by expanding our U.S. shareholder base,” said Cornerstone Metals President and CEO, Paul Cowley. Cornerstone …