Announcement PDF ASX Announcement 2nd February 2026 Pinnacle Minerals Ltd Issued Capital Australian Registered Office Directors ACN: 655 033 677 ASX: PIM 117,219,517 Shares 57,887,507 Options Unit 6, Level 1, 389 Oxford Street Mount Hawthorn WA 6016 T: + 61 8 9426 0666 E: admin@pinnacleminerals.com.au STEPHENS ROSS –- Chairman WILLIAM WITHAM – Managing Director and CEO JAY STEPHENSON – Non-Executive Director www.pinnacleminerals.com.au Mutual Termination of Idaho Antimony Transaction Agreements With reference to ASX announcement 15 October 2025 “Pinnacle to acquire eight US critical minerals, gold and silver projects, including past-producing assets” Pinnacle Minerals Ltd (ASX: PIM) (PIM or the Company) wishes to advise that all parties involved in the sale and purchase of these US assets have mutually agreed to terminate: • the binding heads of agreement dated 9 October 2025 between PIM, Idaho Antimony Critical Minerals Pty Ltd and Templeton Idaho Custodian Pty Ltd (as trustee of the IACM Trust) (Acquisition HOA); and • the binding heads of agreement dated on or about 25 August 2025 between Lia Energy Holdings LLC, Idaho Antimony Corp and Idaho Antimony Critical Minerals Pty Ltd (Option HOA). The termination of both agreements has been agreed amicably and by mutual consent. The parties have also agreed the form of this announcement. Positive Outlook The Company continues to regard the Idaho Antimony opportunity as highly prospective and believes the underlying assets remain attractive and strategically relevant, particularly given strong and growing market interest in critical minerals. The mutual termination of the agreements does not reflect any adverse view on the quality or potential of the assets. Pinnacle has a strong cash position at the end of the December 2025 quarter of $2.8m and the Company remains focused on disciplined value creation and will continue to assess and pursue value-accretive mineral opportunities aligned with its strategic objectives. Additional Information Following termination, there are no further obligations on PIM under the agreements. The Company will provide further updates to the market in accordance with its continuous disclosure obligations. This announcement has been authorised for release by the Board of Pinnacle Minerals Ltd. For further information, please contact: Managing Director and CEO William Witham Pinnacle Minerals Limited E: admin@pinnacleminerals.com.au T: +61 417 097 172 InvestorHub: https://pinnacleminerals.com.au/link/PQbbby