GREAT BOULDER RESOURCES LIMITED — Director's Dealing 2025

Nov 23, 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 Boulder Resources Limited ABN 70 611 695 955

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	Karen O’Neill
Date of last notice	6 December 2024

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
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.	N/A
Date of change	24 November 2025
No. of securities held prior to change	a) 150,000 Fully Paid Ordinary Shares b) 2,000,000 Options exercisable at $0.14 expiring 22 November 2025 c) 2,000,000 options exercisable at $0.0645expiring20 November 2027
Class	Unlisted options exercisable at $0.14 expiring 22 November 2025
Number acquired	Nil
Number disposed	2,000,000
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation	Nil

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 1

Appendix 3Y Change of Director’s Interest Notice

No. of securities held after change a) 150,000 Fully Paid Ordinary Shares c) 2,000,000 options exercisable at $0.0645 expiring 20 November 2027 Nature of change Cancellation of options that were not exercised Example: on-market trade, off-market trade, exercise of options, issue and have now expired. of securities under dividend reinvestment plan, participation in buyback

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	N/A
Nature of interest	N/A
Name of registered holder (if issued securities)	N/A
Date of change	N/A
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	N/A
Interest acquired	N/A
Interest disposed	N/A
Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation	N/A
Interest after change	N/A

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?	N/A
If so, was prior written clearance provided to allow the trade to proceed during this period?	N/A
If prior written clearance was provided, on what date was this provided?	N/A

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011

Appendix 3Y Change of Director’s Interest Notice

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 3