GREAT DIVIDE MINING LTD — Director's Dealing 2025

Dec 21, 2025

Appendix 3Y Change of Director’s Interest Notice

Rule 3.19A.2

Appendix 3Y

Change of Director’s Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public.

Introduced 30/09/01 Amended 01/01/11

Name of entity GREAT DIVIDE MINING LIMITED ABN 47 655 868 803

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director	Simon Tolhurst
Date of last notice	8 April 2025

Part 1 - Change of director’s relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of “notifiable interest of a director” should be disclosed in this part.

Direct or indirect interest		Indirect
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.		Amber Acreman as trustee for the Tolhurst HWL Practice Trust
Date of change		22 December 2025
No. of securities held prior to change		Amber Acreman as trustee for the Tolhurst HWL Practice Trust 362,500 Fully Paid Ordinary Shares 400,000 Unlisted Options exercisable at $0.40 expiring 23 August 2026
Class		Fully Paid Ordinary Shares Unlisted Options
Number acquired		112,887 Fully Paid Ordinary Shares 112,887 Unlisted Options
Number disposed (result from share consolidation)		Nil
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation		$30,000

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

No. of securities held after change		Amber Acreman as trustee for the Tolhurst HWL Practice Trust 475,387 Fully Paid Ordinary Shares 400,000 Unlisted Options exercisable at $0.40 expiring 23 August 2026 112,887 Unlisted Options exercisable at $0.50 expiring
Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back		Loan Note Conversion

Part 2 – Change of director’s interests in contracts

Note: In the case of a company, interests which come within paragraph (ii) of the definition of “notifiable interest of a director” should be disclosed in this part.

Detail of contract	Not applicable
Nature of interest	Not applicable
Name of registered holder (if issued securities)	Not applicable
Date of change	Not applicable
No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed	Not applicable
Interest acquired	Not applicable
Interest disposed	Not applicable
Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation	Not applicable
Interest after change	Not applicable

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

Part 3 –[+] Closed period

art 3 –+Closed period
Were the interests in the securities or contracts detailed above traded during a+closed period where prior written clearance was required?	No
If so, was prior written clearance provided to allow the trade to proceed during this period?	Not applicable
If prior written clearance was provided, on what date was this provided?	Not applicable

Rule 3.19A.2

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

Rule 3.19A.2

Appendix 3Y

Change of Director’s Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public.

Introduced 30/09/01 Amended 01/01/11

Name of entity GREAT DIVIDE MINING LIMITED ABN 47 655 868 803

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director	Adam Arkinstall
Date of last notice	19 August 2025

Part 1 - Change of director’s relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of “notifiable interest of a director” should be disclosed in this part.

Direct or indirect interest		Direct and Indirect
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.		AG Investment Fund Pty Ltd Mr Arkinstall is a controller of this entity and has a beneficial interest in the securities it holds. Archie Arkinstall Archie is Mr Arkinstall’s son. Mr Arkinstall considers he may have the ability to exercise control over this holding given Archie is a minor. Mr Adam John Arkinstall & Mr Ian John Arkinstall Mr Arkinstall is a joint registered holder and has a beneficial interest in the securities held.
Date of change		Per annexure

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

No. of securities held prior to change		Adam Arkinstall 90,984 Fully Paid Ordinary Shares AG Investment Fund Pty Ltd 1,850,000 Fully Paid Ordinary Shares 610,000 Unlisted Options exercisable at $0.40 expiring 23 August 2026 Archie Arkinstall 10,000 Fully Paid Ordinary Shares 2,000 Unlisted Options exercisable at $0.40 expiring 23 August 2026 Mr Adam John Arkinstall & Mr Ian John Arkinstall 263,219 Fully Paid Ordinary Shares
Class		Fully Paid Ordinary Shares Unlisted Options
Number acquired		435,617 Fully Paid Ordinary Shares 282,218 Unlisted Options
Number disposed (result from share consolidation)		Nil
Value/ConsiderationNote: If consideration is non-cash, provide details and estimated valuation		$127,708
No. of securities held after change		Adam Arkinstall 244,383 Fully Paid Ordinary Shares AG Investment Fund Pty Ltd 2,132,218 Fully Paid Ordinary Shares 610,000 Unlisted Options exercisable at $0.40 expiring 23 August 2026 282,218 Unlisted Options exercisable at $0.50 expiring Archie Arkinstall 10,000 Fully Paid Ordinary Shares 2,000 Unlisted Options exercisable at $0.40 expiring 22 December 2027 Mr Adam John Arkinstall & Mr Ian John Arkinstall 263,219 Fully Paid Ordinary Shares
Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back		Loan Note Conversion and on-market purchases

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

Part 2 – Change of director’s interests in contracts

Note: In the case of a company, interests which come within paragraph (ii) of the definition of “notifiable interest of a director” should be disclosed in this part.

Detail of contract	Not applicable
Nature of interest	Not applicable
Name of registered holder (if issued securities)	Not applicable
Date of change	Not applicable
No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed	Not applicable
Interest acquired	Not applicable
Interest disposed	Not applicable
Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation	Not applicable
Interest after change	Not applicable

Part 3 –[+] Closed period

art 3 –+Closed period
Were the interests in the securities or contracts detailed above traded during a+closed period where prior written clearance was required?	No
If so, was prior written clearance provided to allow the trade to proceed during this period?	Not applicable
If prior written clearance was provided, on what date was this provided?	Not applicable
	Rule 3.19A.2

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

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• See chapter 19 for defined terms.