IREN Ltd

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Co-Chief Executive Officers and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Quarterly Report. The Company’s disclosure controls and procedures are designed to provide reasonable assurance that the information we are required to disclose in the reports we file or submit under the Exchange Act is (1) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and (2) accumulated and communicated to our management to allow timely decisions regarding required disclosures. There are inherent limitations to the effectiveness of any system of disclosure controls and procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control objectives.

Based on such evaluation, our Co-Chief Executive Officers and Chief Financial Officer concluded that, as of September 30, 2025, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control Over Financial Reporting

On July 1, 2025, we transitioned to a new enterprise resource planning (“ERP”) system as part of our effort to modernize and standardize our financial systems, and in connection to the foregoing, made certain changes to our internal controls over financial reporting, related to the associated processes. We will continue to evaluate any further changes, if any, in our internal control over financial reporting during subsequent periods to confirm adequate internal control effectiveness.

Other than the ERP implementation noted above, there has been no change to the Company’s internal control over financial reporting that occurred during the three months ended September 30, 2025, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.