GREAT BOULDER RESOURCES LIMITED — Director's Dealing 2026

Jan 5, 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 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	Andrew Paterson
Date of last notice	10 February 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
Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.	N/A
Date of change	6 January 2026
No. of securities held prior to change	6,278,178 Ordinary Fully Paid Shares 7,000,000 Performance Rights expiring 3 December 2026 4,500,000 Performance Rights expiring 3 December 2027
Class	a) Ordinary Fully Paid Shares b) Performance Rights
Number acquired	a) 7,000,000 ordinary shares acquired on conversion of performance rights
Number disposed	b) 7,000,000 vested performance rights converted into ordinary shares
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation	N/A

• 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	13,278,178 Ordinary Fully Paid Shares 4,500,000 Performance Rights expiring 3 December 2027
Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back	Conversion of performance rights into ordinary shares

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

Part 3 –+Closed period
Were the interests in the securities or contracts detailed above traded during a+closed period where prior written clearance was required?	Yes
If so, was prior written clearance provided to allow the trade to proceed during this period?	Yes
If prior written clearance was provided, on what date was this provided?	6 January 2026

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011