IREN Ltd

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 June 30, 2026. 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, including our Co-Chief Executive Officers and Chief Financial Officer, as appropriate 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 June 30, 2026, our disclosure controls and procedures were effective at the reasonable assurance level.

Management’s Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Internal control over financial reporting is a process designed by, or under the supervision of, our Co-Chief Executive Officers and Chief Financial Officer, and effected by the Board, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP accounting standards and includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP accounting standards, and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the Company’s assets that could have a material effect on the financial statements.

Our management assessed the effectiveness of our internal control over financial reporting as of June 30, 2026. This assessment was performed under the direction and supervision of our Co-Chief Executive Officers and our Chief Financial Officer, and based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

In accordance with guidance issued by the SEC, companies are permitted to exclude acquisitions from their assessment of internal control over financial reporting for a period not to exceed one year from the date of acquisition. Management’s assessment of the effectiveness of our internal controls over financial reporting as of June 30, 2026, did not include the internal controls of Nostrum Group, which we acquired on June 12, 2026. We have included the financial results of Nostrum Group in our Consolidated Financial Statements since the date of acquisition. Total assets of Nostrum Group represented approximately 2% of our consolidated total assets as of June 30, 2026 and less than 1% of our consolidated total revenue for the year ended June 30, 2026.

Based on this assessment, our management concluded that, as of June 30, 2026, our internal control over financial reporting was effective.

Attestation Report of the Registered Public Accounting Firm

The effectiveness of our internal control over financial reporting as of June 30, 2026, has been audited by KPMG LLP, an independent registered public accounting firm, as stated in their report which appears in Item 8 of this Annual Report.

Changes in Internal Control Over Financial Reporting

Except for the acquisition of Nostrum Group on June 12, 2026, whose internal controls were excluded from management’s assessment as described above and which we are in the process of integrating into our internal control over financial reporting, there was no change to the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during the period covered by this Annual Report that has materially affected, or is reasonably likely to materially affect, internal control over financial reporting.