Marimaca Copper – Update to A$80,000,000 Placement _____________________________________________________________________________________________________
News Release
Not for release to U.S. wire services or for distribution in the United States
Marimaca Copper – Update to A$80,000,000 Placement
_____________________________________________________________________________________________________
Vancouver, B.C., September 4, 2025 – Marimaca Copper Corp. (TSX: MARI) (ASX: MC2) (“Marimaca” or the “Company”)
announces that further to the previously announced best-efforts brokered placement in Australia and select other
jurisdictions outside of Australia, except for Canada , the Company will issue an aggregate of 8,247,423 Chess Depositary
Interests (“CDI”) at a price of A$9.70 (1) per CDI for gross proceeds of approximately A$80,000,000 or approximately
C$72,080,000 (the “Placement”).
The net proceeds from the Placement will be used f or detailed design and engineering and project related workstreams at
the Marimaca Oxide Deposit (the “MOD”), exploration at the Pampa Medina Project and Marimaca sulphide target, and for
general corporate purposes.
The CDIs will be issued pursuant to the ASX Listing Rule 7.1 waiver granted to Marimaca.
An indicative timetable for the Placement is included below:
Indicative Timetable
Event Time / Date
Company placed in Trading Halt on ASX(2) Friday, 05 September 2025 (AEST)
Trading Halt lifted and return to trading on ASX Monday, 08 September 2025 (AEST)
Placement settlement Thursday, 11 September 2025 (AEST)
Allotment of Placement CDIs Friday, 12 September 2025 (AEST)
(1) From A$9.55 per CDI
(2) Due to time zone difference between Sydney (AEST) and Toronto (EST), the trading halt on the ASX will occur during non-trading hours on the
TSX. Trading of the common shares of the Company is expected to continue in the normal course during trading hours on Friday September 5,
2025 (EST).
The dates and times noted above are indicative only and subject to change. Any material changes will be notified by the
Company to ASX. The Company reserves the right to amend any or all of the above dates and times . Completion of the
Placement is subject to certain closing conditions, including but not limited to the receipt of all necessary regulatory and other
approvals, including the approval of the Toronto Stock Exchange (“TSX”).
Macquarie Capital (Australia) Limited, Euroz Hartleys Limited, and Beacon Securities Limited are acting as joint lead managers
in respect to the Placement.
This announcement has been prepared for publication in Australia and may not be released to U.S. wire services or distributed
in the United States. This news release does not constitute an offer to sell, or the solicitation of an offer to buy , securities in
the United States, nor shall there be any sale of these securities in any jurisdiction in which such offer, solicitation or s ale
would be unlawful. The securities offered in the Placement have not been, and will not be, registered under the U.S. Securities
Act of 1933, as amended (the “ U.S. Securities Act”) or any U.S. state securities laws, and may not be offered or sold in the
United States or to, or for the account or benefit of, United States persons absent registration or an applicable exemption
from the registration requirements of the U.S. Securities Act and applicable U.S. state securities laws.
Hayden Locke, President & CEO of Marimaca Copper, commented:
“We are very pleased to see strong support from high-quality investors for the next phase of our development and exploration
plans at Marimaca and Pampa Medina. This raise will allow us to move expeditiously into the detailed design and engineering
phase at the MOD, as well as expand the exploration program at both Pampa Medina and the Marimaca sulphides exploration
target. The recent MOD Definitive Feasibility Study demonstrated a very robust starting-point in our overall regional
development goals and we are grateful for the continued support to deliver on that strategy.”
About Marimaca
Marimaca is a copper exploration and development company focused on its 100% -owned flagship Marimaca Copper Project
and surrounding exploration properties located in Antofagasta Region, Chile.
The Marimaca Copper Project hosts the Marimaca Oxide Deposit (the “ MOD”), an IOCG-type copper deposit. The Company
is currently progressing the Marimaca Copper Project through the Definitive Feasibility Study led by Ausenco Chile Ltda. In
parallel, the Company is exploring its extensive land package in the Antofagasta region, including the >15,000ha wholly-owned
Sierra de Medina property block, located 25km from the MOD.
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
Forward-Looking Statements
This news release includes certain “forward-looking statements” under applicable Canadian securities legislation, including
statements related to the anticipated participation in and size of the Placement, anticipated timing and closing date of the
Placement, advisory fees payable, the use of proceeds and receipt of regulatory approvals and other approvals, including
approval of the TSX. There can be no assurance that such statements will prove to be accurate and actual results and future
events could differ materially from those anticipated in such statements. Forward-looking statements reflect the beliefs,
opinions and projections on the date the statements are made and are based upon a number of assumptions and estimates
that, while considered reasonable by Marimaca, are inherently subject to significant business, economic, competitive, political
and social uncertainties and contingencies. Many factors, both known and unknown, could cause actual results, performance
or achievements to be materially different from the results, performance or achievements that are or may be expressed or
implied by such forward -looking statements and the parties have made assumptions and estimates based on or related to
many of these factors. Such fa ctors include, without limitation: risks related to the receipt of required regulatory approvals ,
including timing of approval by the TSX, risks related to share price and market conditions, the inherent risks involved in the
mining, exploration and development of mineral properties, the uncertainties involved in interpreting drilling results and
other geological data, fluctuating metal pri ces, the possibility of project delays or cost overruns or unanticipated excessive
operating costs and expenses, uncertainties related to the necessity of financing, uncertainties relating to regulatory
procedure and timing for permitting reviews, the availability of and costs of financing needed in the future. The intended use
of the proceeds of the Placement by the Company might change if the board of directors of the Company determines that it
would be in the best interests of the Company and amounts actually allocated and spent will depend on a number of factors,
including the Company ’s ability to execute on its business plan. Many of these risks and uncertainties and additional risk
factors generally applicable to the Company are described in the Company’s annual information form of the Company dated
March 27, 2025 and other filings made by the Company with the Canadian secur ities regulatory authorities (which may be
viewed at www.sedarplus.ca). Accordingly, readers should not place undue reliance on forward -looking statements. The
Company undertakes no obligation to update publicly or otherwise revise any forward-looking statements contained herein,
whether as a result of new information or future events or otherwise, except as may be required by law.
None of the TSX, ASX or the Canadian Investment Regulatory Organization accepts responsibility for the adequacy or
accuracy of this release.