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MARIMACA COPPER CORP. Major Shareholding Notification 2025

Oct 14, 2025

65301_rns_2025-10-14_1c144165-31bc-48d2-9919-d2d751155787.pdf

Major Shareholding Notification

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News Release

Notice of Substantial Holder Movement


This notice is given by Marimaca Copper Corp. ( TSX: MARI ) ( ASX: MC2 ) (“ Marimaca ” or the “ Company ”).

The Company advises that it has been informed that Assore International Holdings Ltd. has increased its shareholding as follows:

  1. Previous holding: 15,142,210 CHESS Depositary Interests (“ CDIs ”) / Shares representing 14.99% of issued capital on 24 January 2025 (being the date of the Company’s prospectus).

  2. Updated holding: 22,387,694 CDIs / Shares representing 18.89%[1] of issued capital, with the holding increased via placement participation in June 2025 and September 2025, and the purchase of shares and exercise of warrants in September 2025.

This news release is authorized for release by the Board of Directors of Marimaca.

Contact Information

For further information please visit www.marimaca.com or contact:

Tavistock +44 (0) 207 920 3150 Emily Moss / Ruairi Millar

[email protected]

None of the TSX, ASX or the Canadian Investment Regulatory Organization accepts responsibility for the adequacy or accuracy of this release.

1 Reconciled via information available to the Company at the time of reporting