MARIMACA COPPER CORP. — Capital/Financing Update 2026

Feb 17, 2026

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Market Announcement

18 February 2026

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Marimaca Copper Corp. (ASX: MC2) – Trading Halt

Trading in the securities of Marimaca Copper Corp. (‘MC2’) will be halted at the request of MC2, pending the release of an announcement by MC2.

Unless ASX decides otherwise, the securities will remain in trading halt until the earlier of:

• the commencement of normal trading on Friday, 20 February 2026; or

• the release of the announcement to the market.

MC2’s request for a trading halt is attached below for the information of the market.

Issued by

ASX Compliance

Market Announcement 1/1 ASX Customer Service Centre 131 279 | asx.com.au

18 February 2026 ASX Limited

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Ms Sandra Wutete Adviser, Listings Compliance Level 40, Central Park 152-158 St Georges Terrace Perth WA 6000

By email: tradinghaltsperth@asx.com.au

Request for Trading Halt

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Vancouver, B.C., February 17, 2026 – Marimaca Copper Corp. (TSX: MARI) (ASX: MC2) (“Marimaca” or the “Company”) requests a trading halt to be applied to the Company’s securities listed on the ASX in accordance with Listing Rule 17.1 with immediate effect.

The Company advises that:

1. the trading halt is requested pending an announcement regarding a proposed capital raising;

2. the Company requests that the trading halt remain in place until the earlier of such time as it makes an announcement to the market regarding the above or the commencement of trading on February 20, 2026 (AEDT); and

3. the Company is not aware of any reason why the trading halt should not be granted or of any other information necessary to inform the market or ASX about the request.

Hayden Locke Managing Director

Contact Information

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

Tavistock

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

marimaca@tavistock.co.uk