Tintina Mines Closes C$91 Million Subscription Receipt Financing to Advance Domeyko Sulfuros Transaction with Strategic Investment from the Gignac Family, Sumitomo Corporation and Franco-Nevada

About this update from Tintina Mines Limited

NOT FOR DISSEMINATION IN THE UNITED STATES OR FOR DISTRIBUTION TO UNITED STATES NEWS WIRE SERVICES TORONTO, ON AND SANTIAGO, CHILE / ACCESS Newswire / July 10, 2026 / Tintina Mines Limited (TSXV:TTS) ("Tintina" or the "Company") is pleased to announce that it has closed its non-brokered private placement (the "Offering") of subscription receipts (the "Subscription Receipts") for aggregate gross proceeds of approximately C$91 million, at a price of C$0.68 per Subscription Receipt, as previously described in the Company's news releases dated June 2, 2026 and July 2, 2026. The Subscription Receipts were issued on July 9, 2026, and the gross proceeds of the Offering are being held in escrow pending satisfaction of the Escrow Release Conditions (as defined below). The Offering was anchored by a newly formed investment vehicle (the "Anchor Investor") funded equally by Sumitomo Corporation ("Sumitomo"), a leading Fortune Global 500 integrated trading and business investment company headquartered in Tokyo, Japan, and the Gignac family, founders of G Mining Services Inc. ("G Mining Services"), a Canadian mining development company with an established track record of project delivery. The Offering also included cornerstone participation from Franco-Nevada Corporation, a leading gold-focused royalty and streaming company, and a broader group of strategic, institutional and other investors assembled by G Mining Capital Inc. ("GMC"), a Canadian mining investment platform whose principal shareholders are the Gignac family and Sumitomo. The Offering included participation from a broad investor base, including strategic and institutional investors, retail investors and global asset managers. Canaccord Genuity Corp. acted as finder in connection with approximately C$17 million of Subscription Receipts issued under the Offering, in consideration for which it received a 5% cash finder's fee from the Company. Upon satisfaction of the Escrow Release Conditions, net proceeds of the Offering are expected to be used to advance the Domeyko Sulfuros copper-gold project (the "Project") toward a final investment decision ("FID"), including preliminary economic assessment optimisation, infill and exploration drilling, environmental baseline studies, permitting, community engagement and the preparation of a definitive feasibility study, and to fund the acquisition of the remaining 26.25% minority interest in Tintina's Chilean operating subsidiary, Andean Belt Resources SpA ("ABR"), for aggregate cash consideration of US$26.25 million (the "Minority Acquisition").

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