Cosa Announces Upsized C$12 Million Bought Deal Private Placement Including Participation by Denison Mines

Vancouver, British Columbia--(Newsfile Corp. - June 4, 2026) - Cosa Resources Corp. (TSXV: COSA) (OTCQB: COSAF) (FSE: SSKU) ("Cosa" or the "Company") is pleased to announce that, in connection with its previously announced "bought deal" private placement (the "Offering"), it has entered into an amended agreement with Velocity Trade Capital Ltd., on behalf of itself and a syndicate of underwriters to include Haywood Securities Inc. as co-lead underwriter (collectively, the "Underwriters") to increase the size of the Offering to: (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.