MacDonald Mines Exploration Ltd. (ticker: MCDMD) engages in the acquisition, exploration, and development of mineral properties primarily focused on precious and critical metals including gold, copper, cobalt, nickel, silver, and rare earth elements in Ontario, Canada; the company holds 100% ownership of its flagship SPJ Project, comprising the Scadding, Powerline, and Jovan properties spanning 19,710 hectares located approximately 40 kilometers northeast of the prolific Sudbury Mining Camp, which features multiple polymetallic centers of mineralization associated with iron oxide copper-gold (IOCG) systems, the historical Scadding Mine that produced 29,000 ounces of gold from 144,000 tonnes grading 7.43 g/t during the 1980s, and other targets such as Alwyn Mine, Glade, and Norstar with potential for battery and precious metal deposits; operations target mining-friendly jurisdictions with year-round access to rail, road, power, and skilled workforce in North America. Founded in 1935 and headquartered in Toronto, Canada, the company was formerly known as MacDonald Mines Limited and maintains a strategic emphasis on systematic exploration to connect polymetallic showings across its land package. In 2025, MacDonald Mines undergoes a major strategic shift through its acquisition by Canuc Resources Corporation (TSXV: CDA) via a three-cornered amalgamation arrangement, completed in May following shareholder approval and issuance of approximately 73.8 million Canuc shares at a 1.497 exchange ratio, integrating the SPJ Project into Canuc's portfolio alongside its San Javier silver-gold project in Mexico and natural gas assets in Texas, with outstanding warrants and options exercisable into additional Canuc shares.