GREAT BOULDER RESOURCES LIMITED — Audit Report / Information 2024

Feb 9, 2025

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ASX Announcement
10 FEBRUARY 2025
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CHANGE OF COMPANY AUDITOR

Great Boulder Resources (“ Great Boulder ” or the “ Company ”) (ASX: GBR ) advises that in accordance with ASX Listing Rule 3.16.3, Criterion Audit Pty Ltd (“ Criterion ”) has been appointed as auditor of the Company and RSM Australia Partners (“ RSM ”) has resigned as the Company auditor. ASIC has consented to the resignation in accordance with section 329(5) of the Corporations Act.

The decision to change auditors was made following a review by the Board of the Company’s external audit arrangements and a tender and consultation process.

In accordance with section 327C of the Corporations Act 2001, the appointment of Criterion as auditors of the Company will be recommended by the Board for ratification at the Company’s next General Meeting.

The Board would like to take this opportunity to thank RSM for their service to the Company. For and on behalf of the Company,

Melanie Ross Company Secretary

This announcement has been approved by the Great Boulder Board.

For further information contact:

Andrew Paterson

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Media

Managing Director Lucas Robinson Great Boulder Resources Limited Corporate Storytime admin@greatboulder.com.au +61 408 228 889 www.greatboulder.com.au lucas@corporatestorytime.com

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Follow GBR on LinkedIn

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Follow GBR on Twitter

E: admin@greatboulder.com.au GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

ASX Announcement

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ABOUT GREAT BOULDER RESOURCES

Great Boulder is a mineral exploration company with a portfolio of highly prospective gold and base metals assets in Western Australia ranging from greenfields through to advanced exploration. The Company’s core focus is the Side Well Gold Project at Meekatharra in the Murchison gold field, where exploration has defined a Mineral Resource of 7.45Mt @ 2.8g/t Au for 668,000oz Au (340koz @ 3.4g/t Au Indicated, 327koz @ 2.4g/t Au Inferred). The Company is also progressing earlystage exploration at Wellington Base Metal Project located in an emerging MVT province. With a portfolio of highly prospective assets plus the backing of a strong technical team, the Company is well positioned for future success.

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CAPITAL STRUCTURE 759M ~$7.5M $1.0M $43k SHARES ON ISSUE CASH LISTED INVESTMENT DAILY LIQUIDITY ASX:GBR As at 31/12/24 Cosmo Metals (ASX:CMO) Average 30-day value traded $42.5M Nil 64.5M ~37% MARKET CAP DEBT UNLISTED OPTIONS TOP 20 OWNERSHIP At $0.056/sh As at 31/12/2024

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Exploring WA Gold & Developing a Technically focused Undertaking smart, Base Metal assets, significant high grade, exploration team with innovative & located in proximity to large scale gold a strong track record systematic exploration operating mines & system at Side Well of discovery infrastructure

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Ongoing drilling at multiple projects providing consistent, material newsflow

E: admin@greatboulder.com.au GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005

ASX Announcement 10 FEBRUARY 2025

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COMPETENT PERSON’S STATEMENT

Exploration information in this Announcement is based upon work undertaken by Mr Andrew Paterson who is a Member of the Australasian Institute of Geoscientists (AIG). Mr Paterson has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a ‘Competent Person’ as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’ (JORC Code). Mr Paterson is an employee of Great Boulder Resources and consents to the inclusion in the report of the matters based on their information in the form and context in which it appears.

The information that relates to Mineral Resources was first reported by the Company in its announcement to the ASX on 16 November 2023. The Company is not aware of any new information or data that materially affects the information included in this announcement and that all material assumptions and technical parameters underpinning the estimates continue to apply and have not material changed. The Company confirms that the form and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement.

E: admin@greatboulder.com.au GREATBOULDER.COM.AU ABN 70 611 695 955

ASX Code: GBR Contact: Andrew Paterson, Managing Director P: +61 8 9321 6037 Level 1, 51 Colin St West Perth WA 6005