Investor Presentaiton

Important Notice and Disclaimer The release, publication or distribution of this presentation in certain jurisdictions may be restricted by law and therefore persons in such jurisdictions into which this presentation is released, published or distributed should inform themselves about and observe such restrictions. Released with the authority of the Board May 2023. Disclaimer This presentation is for informational purposes only and does not constitute an offer to sell, or solicitation to purchase, any securities. Such offer can be made only through proper subscription documentation and only to investors meeting strict suitability requirements. Any failure to comply with these restrictions may constitute a violation of applicable securities laws. In providing this presentation Resource Base Limited ACN 113 385 425 and its subsidiaries ("RBX") has not considered the financial position or needs of the recipient. Persons needing advice should consult their stockbroker, bank manager, solicitor, attorney, accountant or other independent financial and legal advisors. Forward Looking Statements Various statements in this presentation constitute statements relating to intentions, future acts and events. Such statements are generally classified as "forward looking statements" and involve known and unknown risks, uncertainties and other important factors that could cause those future acts, events and circumstances to differ materially from what is presented or implicitly portrayed herein. Words such as "anticipates", "expects", "intends", "plans", "believes", "seeks", "estimates" and similar expressions are intended to identify forward-looking statements. RBX caution shareholders and prospective shareholders not to place undue reliance on these forward-looking statements, which reflect the view of RBX only as of the date of this presentation. The forward-looking statements made in this presentation relate only to events as of the date on which the statements are made. Competent Person Statement The information in this report which relates to Exploration Results is based on, and fairly represents, information compiled by Mr Edward Mead. Mr Mead is a Member of the Australian Institute of Geoscientists (AIG) and consultant of the Company. Mr Mead has sufficient experience which 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' (the JORC Code). The Company confirms that it is not aware of any new information or data that materially affects the information in the relevant market announcement. Mr Mead consents to the inclusion in this report of the matters based on his information in the form and context in which it appears. 2 Investor Presentation | May 2023 RESOURCE BASE

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