Euro Manganese Announces Filing of NI 43-101 Technical Report and the JORC Code Report for the Preliminary Economic Assessment of the Chvaletice Manganese Project

About this update from Euro Manganese, Inc.

Sensitivity Analysis updated to reflect market and includes new upside case of post-tax NPV of US$798 million and post-tax IRR of 16.9% using 8% discount rate Vancouver, British Columbia--(Newsfile Corp. - June 29, 2026) - Euro Manganese Inc. (TSXV: EMN) (ASX: EMN) (FSE: E060) and its subsidiary Mangan Chvaletice, s.r.o. (together the "Company", "Euro Manganese" or "EMN") is pleased to announce that the Company has now filed on SEDAR+ the "Preliminary Economic Assessment, NI 43-101 Technical Report for the Chvaletice Manganese Project in Chvaletice, Czech Republic" (the "Technical Report"), prepared in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101"). Further, the Company will lodge on the ASX Announcement Platform the "Preliminary Economic Assessment, Public Report for the Chvaletice Manganese Project in Chvaletice, Czech Republic" (the "JORC Code Report"), prepared in accordance with the Joint Ore Reserves Committee ("JORC") Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves 2012 Edition. The Technical Report and JORC Code Report will also be available for review on the Company's website at www.mn25.ca. Both reports were prepared by Tetra Tech Canada Inc. with an effective date of May 14, 2026. The results of the Technical Report and JORC Code Report were summarized in the Company's news release dated May 14, 2026, titled "Euro Manganese Announces Positive Preliminary Economic Assessment" (the "Summary Announcement"). The Technical Report and JORC Code Report (together, the "PEA") confirm the economic and technical results disclosed in the Summary Announcement and provide an update the sensitivity analysis used to respond to market conditions. Highlights Sensitivity Analysis Update As part of the sensitivity analysis update, Tetra Tech included an upside case based on a report by Marketeye.org indicating a potential long-term HPMSM price of approximately US$3,250 to US$3,300 per tonne. The average expected price was used to highlight the upside case. The PEA is based solely on Measured and Indicated Mineral Resources and does not include Inferred Mineral Resources. The material assumptions underpinning the production target and forecast financial information in the PEA are set out in Summary Announcement and PEA.

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