SUNSTONE METALS LTD — Capital/Financing Update 2025

Dec 15, 2025

ASX ANNOUNCEMENT

16 DECEMBER 2025

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Notice given under Section 708A(5) of the Corporations Act

This notice is given by Sunstone Metals Limited (‘Sunstone’) under section 708A(5)(e) of the Corporations Act 2001 (“Corporations Act”) in relation to an issue of 416,842,106 fully paid ordinary shares by Sunstone on 16 December 2025 without disclosure to sophisticated and professional investors ( Placement ), under Part 6D.2 of the Corporations Act.

As at the date of this notice, Sunstone has complied with:

• (i) the provisions of Chapter 2M of the Corporations Act as they apply to Sunstone; and

• (ii) sections 674 and 674A of the Corporations Act.

Sunstone confirms that, as at the date of this notice, there is no information that:

• (i) has been excluded from a continuous disclosure notice given to ASX in accordance with the ASX Listing Rules; and

• (ii) investors and their professional advisers would reasonably require for the purpose of making an informed assessment of:

  • (a) the assets and liabilities, financial position and performance, profits and losses and prospectus of Sunstone; and

  • (b) the rights and liabilities attaching to fully paid ordinary shares,

to the extent to which it would be reasonable for investors and their professional advisers to expect to find such information.

Lucas Welsh

Company Secretary

Sunstone Metals Limited

For further information, please visit www.sunstonemetals.com.au

Sunstone Metals Limited ABN 68 123 184 412 ASX: STM

L31, 120 Collins St Melbourne V 3000 Australia

REGISTERED OFFICE

+61 3 7044 2627 info@sunstonemetals.com.au sunstonemetals.com.au