MARIMACA COPPER CORP. — Audit Report / Information 2026

May 3, 2026

marimaca COPPER CORP

MC2 Additional Information for Annual Reports

Vancouver, British Columbia, May 4th, 2026 – Marimaca Copper Corp. (“Marimaca Copper” or the “Company”) provides the following additional information for its audited financial reports for the year ended 31 December 2025, with reference to ASX Listing rule 4.10.

Substantial Holders of Shares

Current substantial shareholders are as follows:

Holder Name	Number of Shares	% Holding
Assore International Holdings Ltd	25,181,405	18.83%
Ithaki Ltd.	20,087,576	15.01%
Greenstone Resources II L.P. and Greenstone Co-Investment No. 1 (Coro) L.P.	8,607,004	6.43%

Note: The above information is based upon information provided insider filings made by Shareholders pursuant to applicable securities laws. The Company has no reason to believe that such information is false or misleading in any material respect. However, the information cannot be verified with complete certainty due to limits on the availability and reliability of information, the voluntary nature of the information gathering process and other limitations and uncertainties. No representation can therefore be given as to the accuracy of any of the information.

Holders of Securities

Security	Number of Holders	Number of Issued Securities
Chess Depositary Interests (CDIs)	154	47,844,616
Common Shares	31	85,976,362
MC2AM : Option Expiring 30-Mar-2031 Ex CAD 7.93	1	100,000
MC2AG : Option Expiring 23-Dec-2026 Ex CAD 3.69	5	791,531
MC2AH : Option Expiring 19-May-2028 Ex CAD 4.00	6	453,469
MC2AI : Option Expiring 14-Nov-2028 Ex CAD 3.40	1	200,000
MC2AE : Option Expiring 06-May-2026 Ex CAD 5.00	9	1,855,000
MC2AL : Restricted Share Units (RSUs)	23	3,579,484

Voting Rights

The voting rights attached to each class of equity security are as follows:

Security	Voting Rights
CDIs	CDI holders cannot vote personally at shareholder meetings. As CDI holders are not the legal owners of underlying shares, CHESS Depositary Nominees Pty Limited (ABN 75 071 346 506) (CDN), which holds legal title to the shares underlying the CDIs, is entitled to vote at shareholder meetings of the Company on the instruction of the CDI holders on a

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COPPER CURE

	poll, not on a show of hands. CDI holders are entitled to give instructions for one (1) vote for every underlying share held by CDN. Alternatively, the CDI holder can, if they wish, request to convert their CDIs into shares prior to the record date for the relevant meeting in order to vote in person at the meeting.
Common Shares	Subject to any special rights or restrictions attached to any shares and to the restrictions imposed on joint shareholders: (a) each shareholder entitled to vote may vote in person or by proxy; (b) on a vote by show of hands, every person present who is a shareholder or proxy holder and entitled to vote on the matter has one vote; and (c) on a poll, every shareholder entitled to vote on the matter has one vote in respect of each share entitled to be voted on the matter and held by that shareholder and may exercise that vote either in person or by proxy.
MC2AM, MC2AG, MC2AH, MC2AI, MC2AE, and MC2AL	Under the Company’s Omnibus Incentive Plan, neither the holder of an option or RSU nor their personal representatives or legatees have any rights whatsoever as a shareholder in respect of any shares covered by the relevant awards until such award has been duly exercised, as applicable, and settled and shares have been issued in respect thereof.

Distribution Schedules

Category (size of holding)	Number of Common Share / CDI holders	Percentage of Issued Capital held (%)
1 – 1,000	52	0.01%
1,001 – 5,000	69	0.16%
5,001 – 10,000	22	0.13%
10,001 – 100,000	15	0.26%
100,001 – and over	27	99.44%
Total	185	100.00%
Category (size of holding)	Number of Option holders	Percentage of Issued Capital held (%)
---	---	---
1 – 1,000	0	0.00%
1,001 – 5,000	0	0.00%
5,001 – 10,000	0	0.00%
10,001 – 100,000	2	18.18%
100,001 – and over	9	81.82%
Total	11	100.00%
Category (size of holding)	Number of RSU holders	Percentage of Issued Capital held (%)
---	---	---
1 – 1,000	0	0.00%
1,001 – 5,000	0	0.00%
5,001 – 10,000	3	13.04%
10,001 – 100,000	11	47.83%
100,001 – and over	9	39.13%
Total	23	100.00%

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marimaca COPPER CORP.

Unmarketable Parcels

The number of CDI holdings held in less than marketable parcels is 9 holders (AU$8.75 share price).

Twenty Largest Shareholders

#	Name	%OS	Position (000)
1	CDS & CO	63.95%	85,575,254
2	HSBC CUSTODY NOMINEES (AUSTRALIA) LIMITED	10.20%	13,650,838
3	HSBC CUSTODY NOMINEES (AUSTRALIA) LIMITED-GSCO ECA	10.18%	13,625,576
4	CITICORP NOMINEES PTY LIMITED	7.44%	9,959,229
5	MERRILL LYNCH (AUSTRALIA) NOMINEES PTY LIMITED	1.40%	1,874,746
6	WARBONT NOMINEES PTY LTD	1.39%	1,863,325
7	BNP PARIBAS NOMS PTY LTD	1.26%	1,682,460
8	J P MORGAN NOMINEES AUSTRALIA PTY LIMITED	0.79%	1,054,322
9	MORGAN STANLEY AUSTRALIA SECURITIES (NOMINEE) PTY LIMITED	0.65%	867,784
10	UBS NOMINEES PTY LTD	0.54%	723,105
11	BENSON CAPITAL LTD	0.33%	448,298
12	BNP PARIBAS NOMS PTY LTD	0.28%	370,175
13	HSBC CUSTODY NOMINEES (AUSTRALIA) LIMITED - A/C 2	0.28%	369,655
14	CERTANE CT PTY LTD	0.17%	226,067
15	NEWECONOMY COM AU NOMINEES PTY LIMITED <900 ACCOUNT>	0.16%	214,812
16	BNP PARIBAS NOMINEES PTY LTD	0.13%	179,740
17	COLIN KINLEY	0.08%	107,130
18	CLIVE NEWALL	0.08%	101,604
19	EXCHANGES CONTROL FOR CLASS C01	0.05%	71,918
20	BNP PARIBAS NOMINEES PTY LTD	0.05%	66,069

Note: The above information is based upon information provided by Company's transfer agent, independent intermediaries that non-registered Shareholders deal with in respect of the Shares (intermediaries include, among others, banks, trust companies, securities dealers or brokers and trustees or administrators of selfadministered RRSPs, RRIFs, RESPs and similar plans) and insider filings made by Shareholders pursuant to applicable securities laws. The Company has no reason to believe that such information is false or misleading in any material respect. However, the information cannot be verified with complete certainty due to limits on the availability and reliability of information, the voluntary nature of the information gathering process and other limitations and uncertainties. No representation can therefore be given as to the accuracy of any of the information.

Registered Office

The Company's registered offices are provided below:

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marimaca

COPPER CURE

Office	Address	Phone Number
Principal registered office	855 West Georgia Street
Suite 2200 Vancouver
British Columbia
Canada V6C 3E8	+56 2 2431 7600
Registered office	Ground Floor
41 Colin Street
West Perth WA 6005
Australia	+61 8 6245 2050

Share Registry

Registers of securities are held at the following locations:

Register	Address	Phone Number
Canadian Share Registry	Computershare Investor Services Inc.
3rd Floor, 510 Burrard Street
Vancouver
British Columbia
Canada V6C 3B9	1-800-564-6253
Australian Share Registry	Computershare Investor Services Pty Limited
Level 17, 221 St Georges Terrace
Perth WA 6000
Australia	1300 850 505
Unquoted Securities	The Company’s registered office and records are located at:
855 West Georgia St, Suite 2200
Vancouver
British Columbia
Canada V6C 3E8	+56 2 2431 7600

Other Stock Exchanges

The Company's common shares are listed for trading on the Toronto Stock Exchange (TSX), also trading on the Australian Securities Exchange (ASX) with common shares to be settled in the form of CDIs.

Restricted Securities

The company has zero restricted securities.

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marimaca

COPPER CORP.

On-Market Buy Back

At the date of this report, the Company is not involved in an on-market buyback.

Use of Funds

The Company has used its cash and assets in a form readily convertible to cash that it had at the time of admission in a way consistent with its business objectives.

ASX Listing Rule Waivers

With regards to waivers received from the ASX on the Company's admission to the ASX official list, the Company confirms the following:

ASX Listing Rule	Details of Waiver
7.1	The Company remains subject to, and complies with, the rules of the TSX with respect to the issue of new securities
10.11.1	The Company remains subject to, and continues to comply with, the requirements of the TSX
10.14	The Company remains subject to, and continues to comply with, the requirements of the TSX with respect to the new issue of securities to related parties