Minnesota Commitment | Global Opportunity

NewRange Copper Nickel - Strategic Rationale • JV will assist in de-risking development of the North Met project • Teck's Mesaba resource(a) is located near PolyMet's North Met project • • PolyMet brings demonstrated strength in regulatory review and permitting in Minnesota Teck adds demonstrated experience in construction, operations and technology development · Glencore excels in processing, smelting and refining operations in North America • JV further demonstrates commitment to economic development in northern MN a) For more information on the Mesaba 2022 independent resource estimate, refer to the Mesaba Technical Report effective as of November 28, 2022, as filed on SEDAR. POLYMET MINING iii

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