RESOURCE BASE LIMITED. — AGM Information 2025

Oct 23, 2025

ASX ANNOUNCEMENT

24 October 2025

IMPORTANT INFORMATION REGARDING ANNUAL GENERAL MEETING

Dear Shareholder

Notice is hereby given that the Annual General Meeting ( Meeting ) of Resource Base Limited ( Company ) will be held as a physical meeting at Minerva Corporate, Level 8, 99 St Georges Terrace, Perth WA 6000, on Wednesday, 26 November 2025 at 11:00am (AWST).

In accordance with the Corporations Act, notice of the Meeting ( Notice ) is being made available to Shareholders by electronic means and the Company will not be dispatching physical copies of this Notice, unless a Shareholder has elected to receive documents in hard copy.

Instead, the Notice can be viewed and downloaded via:

• the Company’s website at https://resourcebase.com.au/investor-centre/asx-announcements/

• via the Company’s ASX page at https://www2.asx.com.au/markets/company/rbx; and

• if you have nominated an email address and have elected to receive electronic communications from the Company, via the electronic link that is sent to your nominated email address.

The Company strongly encourages shareholders to lodge a directed proxy form prior to the meeting. Shareholders can lodge their vote by going to www.investorvote.com.au and logging in with the meeting ID, your unique shareholder identification number and postcode (or country for overseas residents), which you can find on your enclosed personalised proxy form. Shareholders are also encouraged to provide an email address in order to receive electronic communication from the Company in the future.

Your proxy voting instruction must be received by 11:00am (AWST) on Monday, 24 November 2025, being not less than 48 hours before the commencement of the Meeting. Any proxy voting instructions received after that time will not be valid for the Meeting. The Notice is important and should be read in its entirety. If you are in doubt as to the course of action you should follow, you should consult your financial adviser, lawyer, accountant or other professional adviser. If you have any difficulties obtaining a copy of the Notice, please contact the Company’s share registry, Computershare, on 1800 850 505 (within Australia) or +61 3 9415 4000 (overseas).

Approved for release by the Company Secretary.

For further information please contact: Dan Smith Company Secretary Resource Base Limited E: ds@resourcebase.com.au

RESOURCE BASE LIMITED ACN 113 385 425 Level 8/99 St Georges Terrace, Perth WA 6000 T. +61 8 9486 4036 E. admin@resourcebase.com.au W. www.resourcebase.com.au

ASX: RBX