GREAT BOULDER RESOURCES LIMITED — Capital/Financing Update 2021

Dec 7, 2021

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PRIORITY OFFER TO GBR SHAREHOLDERS

Great Boulder Resources (“ Great Boulder ” or the “ Company ”) (ASX: GBR ) would like to remind its Shareholders that the GBR Shareholder Priority Offer for Cosmo Metals Ltd (“ Cosmo Metals ”) will be closing on Monday, 13 December 2021 .

Cosmo Metals is offering Great Boulder shareholders in eligible jurisdictions that hold shares in Great Boulder at 5:00pm (WST) on 26 November 2021 priority to subscribe for a total of 20,000,000 Shares under the Shares Offer, being $4,000,000 of the total amount to be raised.

Please refer to the Letter to Shareholders that has been sent to all eligible shareholders. Refer to instructions below to access personalised application forms online:

1. Go to https://investor.automic.com.au/#/loginsah

2. Type “Cosmo Metals Limited” or “CMO” in the Company field

3. Enter your Great Boulder Resources HIN/SRN and postcode

4. Tick the “I’m not a robot” box and click “access”

5. Go to “Documents and Statements”

6. Go to “Other Documents”

7. Click on the blue arrow next to your application form to download

Indicative IPO Timeline

Event	Target Date
Lodgement of Prospectus with ASIC and post on website	Monday, 22 November 2021
Record Date for GBR Shareholder Priority Offer	Friday, 26 November 2021
Expiry of Exposure Period	Monday, 29 November 2021(unless extended)
Opening Date of the GBR Shareholder Priority Offer andPublic Offer	Monday, 29 November 2021
Closing Date of the GBR Shareholder Priority Offer	Monday, 13 December 2021
Closing Date of the Public Offer	Friday, 24 December 2021
Issue of New Shares under the Share Offer	Wednesday, 12 January 2022
Despatch of Holding Statements	Friday, 14 January 2022
Shares commence trading on ASX	Thursday, 27 January 2022

Note: These dates are indicative only and may change without notice subject to the Corporations Act, the ASX Listing Rules and other applicable laws.

This announcement has been approved by the Company Secretary Melanie Ross.

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