Investor Presentaiton

Tiehm's buckwheat ioneer Endangered Species Act (ESA) Considerations The protection and conservation of Tiehm's buckwheat, which is already classified as a Sensitive Species by the BLM, is and always has been a central part of ioneer's environmental planning and approvals process for the Project. ioneer has long anticipated the potential listing of Tiehm's buckwheat under the ESA due to the relative rarity of the species. This has been factored into every aspect of Rhyolite Ridge's Project planning including its design, engineering, operational and environmental considerations. In June 2021, the Fish and Wildlife Service (FWS) proposed listing rule Tiehm's buckwheat as an endangered species under the ESA - In December 2021, ioneer and others submitted comments regarding the proposed listing rule loneer does not oppose listing; we want the best science available to be used in order to determine how best to conserve and uplift the plant In February 2022, FWS proposed critical habitat - Announcement was in line with loneer's expectations Critical habitat is primarily focused on providing area to support the pollinator (insect) population that is an important resource for the plant - Mining activity is allowable in areas designated as critical habitat with prior approval and consultation with FWS and BLM A final listing rule is expected in September 2022 ioneer continues to work with FWS and BLM to accommodate issues raised and remains confident that co- existence of Rhyolite Ridge and Tiehm's buckwheat is achievable ioneer Investor Presentation ASX: INR www.ioneer.com 30

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