Cosa Announces Closing of Upsized C$12 Million Bought Deal Private Placement

Vancouver, British Columbia – June 24, 2026 – Cosa Resources Corp. (TSX-V: COSA) (OTCQB: COSAF) (FSE: SSKU) (“Cosa” or the “Company”) is pleased to announce the closing of its previously announced “bought deal” private placement of (i) 5,835,000 common shares of the Company (the “Non-FT Shares”) at a price of C$0.60 per Non-FT Share, (ii) 3,045,000 Saskatchewan charity flow-through common shares of the Company (the “Saskatchewan Charity FT Shares”) at a price of C$0.99 per Saskatchewan Charity FT Share, (iii) 4,020,000 national charity flow-through common shares of the Company (the “National Charity FT Shares” and together with the Saskatchewan Charity FT Shares, the “Charity FT Shares”) at a price of C$0.87 per National Charity FT Share and (iv) 2,860,000 flow-through common shares of the Company (the “FT Shares”, and together with the Non-FT Shares and Charity FT Shares, the “Offered Securities”) at a price of C$0.70 per FT Share, for aggregate gross proceeds to the Company of C$12,014,950 (the “Offering”).