GREAT DIVIDE MINING LTD — Director's Dealing 2026

Mar 19, 2026

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	21 January 2026

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

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

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. Auscoastal Logistics Pty Ltd Mr Arkinstall is a controller of this entity and has a beneficial interest in the securities it holds.
Date of change		20 March 2026
No. of securities held prior to change		Adam Arkinstall 317,301 Fully Paid Ordinary Shares AG Investment Fund Pty Ltd 2,132,218 Fully Paid Ordinary Shares 610,000 $0.40 Unlisted Options (Exp. 23/8/26) 282,218 $0.50 Unlisted Options (Exp. 22/12/27) Archie Arkinstall 10,000 Fully Paid Ordinary Shares 2,000 $0.40 Unlisted Options (Exp. 23/8/26) Mr Adam John Arkinstall & Mr Ian John Arkinstall 263,219 Fully Paid Ordinary Shares Auscoastal Logistics Pty Ltd 100,000 Fully Paid Ordinary Shares
Class		Unlisted Options
Number acquired		250,000 $0.40 Unlisted Options (Exp. 20/3/28) 500,000 $0.50 Unlisted Options (Exp. 20/3/30) 500,000 $0.70 Unlisted Options (Exp. 20/3/30)

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

Number disposed (result from share consolidation)		Nil
Value/ConsiderationNote: If consideration is non-cash, provide details and estimated valuation		Nil
No. of securities held after change		Adam Arkinstall 317,301 Fully Paid Ordinary Shares AG Investment Fund Pty Ltd 2,132,218 Fully Paid Ordinary Shares 610,000 $0.40 Unlisted Options (Exp. 23/8/26) 282,218 $0.50 Unlisted Options (Exp. 22/12/27) 250,000 $0.40 Unlisted Options (Exp. 20/3/28) 500,000 $0.50 Unlisted Options (Exp. 20/3/30) 500,000 $0.70 Unlisted Options (Exp. 20/3/30) Archie Arkinstall 10,000 Fully Paid Ordinary Shares 2,000 $0.40 Unlisted Options (Exp. 23/8/26) Mr Adam John Arkinstall & Mr Ian John Arkinstall 263,219 Fully Paid Ordinary Shares Auscoastal Logistics Pty Ltd 100,000 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		Issue of options as approved by shareholders.

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

• See chapter 19 for defined terms.

Appendix 3Y Change of Director’s Interest Notice

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.