Capstone Copper Corp. — Share Issue/Capital Change 2026

Jan 5, 2026

Appendix 4A - Statement of CDIs on issue

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Part 1 - Entity and announcement details

1.1 Name of +Entity

CAPSTONE COPPER CORP.

1.2 Registered Number Type

ARBN

Registration Number 673751490

1.3 ASX issuer code

CSC

1.4 The announcement is

New announcement 1.5 Date of this announcement

6/1/2026

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Appendix 4A - Statement of CDIs on issue

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Part 2 - Details of +CDIs and other +securities on issue

2.1 Statement for month and year

December-2025

2.2a Number and class of all +CDIs issued over quoted +securities

ASX Security Code and Description +CDI Ratio CSC : CDI 1:1 FOREIGN EXEMPT TSX 1:1 Total number of +CDIs issued over Total number of +CDIs issued over Net Difference (A-B) quoted +securities at end of quoted +securities at end of previous 7,817,865 statement month (A): month (B): 205,040,136 197,222,271

Reason for change:

Common stock

Net transfers of securities between CDIs and

TSX

as quoted / held on

If the total number of +CDIs issued over quoted +securities at the end of the statement month, is greater than the total number of +CDIs issued over quoted +securities for which the entity has previously paid an initial listing fee or an additional listing fee under Table 1A and 1C of Guidance Note 15A, the entity hereby applies for +quotation of the relevant securities

and agrees to the matters set out in Appendix 2A of the ASX Listing Rules.

2.2b Number and class of all +securities on issue over which +CDIs have not been issued

ASX Security Code and Description

CSCAD : COMMON SHARES

Total number of +securities at end of Total number of +securities at end of Net Difference (A-B) statement month (A) previous month (B) 295,901 763,656,709 763,360,808 Reason for change:

Exercise of Stock Options and Treasury Share Units

ASX Security Code and Description

CSCAA : STOCK OPTIONS

Total number of +securities at end of Total number of +securities at end of Net Difference (A-B) statement month (A) previous month (B) -220,302 3,474,911 3,695,213 Reason for change: Exercise of stock options ASX Security Code and Description CSCAB : TREASURY SHARE UNITS Total number of +securities at end of Total number of +securities at end of Net Difference (A-B) statement month (A) previous month (B) -75,599 3,681,601 3,757,200

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Appendix 4A - Statement of CDIs on issue

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Reason for change:

Exercise of treasury based share units

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