SCHEDULE 13G 0001721695 XXXXXXXX LIVE Ordinary shares, no par value (the "Shares") 06/30/2025 0001878848 IREN Ltd Q4982L109 Level 6, 55 Market Street, Sydney C3 NSW 2000 Rule 13d-1(b) Citadel Securities GP LLC DE 0.00 11443163.00 0.00 11443163.00 11443163.00 N 4.7 HC OO The percentages reported in this Schedule 13G are based upon 241,866,828 Shares outstanding as of May 12, 2025 (according to the issuer's Form 6-K as filed with the Securities and Exchange Commission on May 14, 2025). Citadel Securities LLC DE 0.00 11086363.00 0.00 11086363.00 11086363.00 N 4.6 BD OO Citadel Securities Group LP DE 0.00 11443163.00 0.00 11443163.00 11443163.00 N 4.7 HC PN Citadel Advisors LLC DE 0.00 683200.00 0.00 683200.00 683200.00 N 0.3 IA HC OO Citadel Advisors Holdings LP DE 0.00 683200.00 0.00 683200.00 683200.00 N 0.3 HC PN Citadel GP LLC DE 0.00 683200.00 0.00 683200.00 683200.00 N 0.3 HC OO Kenneth Griffin X1 0.00 12126363.00 0.00 12126363.00 12126363.00 N 5.0 HC IN IREN Ltd Level 6, 55 Market Street, Sydney, Australia, NSW 2000 This Schedule 13G is being jointly filed by Citadel Securities GP LLC ("CSGP"), Citadel Securities LLC ("Citadel Securities"), Citadel Securities Group LP ("CALC4"), Citadel Advisors LLC ("Citadel Advisors"), Citadel Advisors Holdings LP ("CAH"), Citadel GP LLC ("CGP"), and Mr. Kenneth Griffin (collectively with CSGP, Citadel Securities, CALC4, Citadel Advisors, CAH, and CGP, the "Reporting Persons") with respect to the Shares of the above-named issuer owned by Citadel Securities, Citadel Securities Principal Strategies LLC, a Delaware limited liability company ("CSP"), and Citadel Multi-Asset Fund (Ireland) Designated Activity Company, an Ireland company ("CMI"). Such owned Shares may include other instruments exercisable for or convertible into Shares. CALC4 is the non-member manager of Citadel Securities and CSP. CSGP is the general partner of CALC4. Citadel Advisors is the portfolio manager for CMI. CAH is the sole member of Citadel Advisors. CGP is the general partner of CAH. Mr. Griffin is the President and Chief Executive Officer of CGP, and owns a controlling interest in CGP and CSGP. The filing of this statement shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any securities covered by the statement other than the securities actually owned by such person (if any). The address of each of the Reporting Persons is 830 Brickell Plaza, Miami, Florida 33131. Each of CSGP, Citadel Securities, Citadel Advisors, and CGP is organized as a limited liability company under the laws of the State of Delaware. Each of CALC4 and CAH is organized as a limited partnership under the laws of the State of Delaware. Mr. Griffin is a U.S. citizen. N BD HC 1. Citadel Securities LLC may be deemed to beneficially own 11,086,363 Shares. 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC may be deemed to beneficially own 11,443,163 Shares. 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC may be deemed to beneficially own 683,200 Shares 4. Mr. Griffin may be deemed to beneficially own 12,126,363 Shares. 1. The number of Shares that Citadel Securities LLC may be deemed to beneficially own constitutes 4.6% of the Shares outstanding. 2. The number of Shares that each of Citadel Securities Group LP and Citadel Securities GP LLC may be deemed to beneficially own constitutes 4.7% of the Shares outstanding. 3. The number of Shares that each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC may be deemed to beneficially own constitutes 0.3% of the Shares outstanding. 4. The number of Shares that Mr. Griffin may be deemed to beneficially own constitutes 5.0% of the Shares outstanding. 1. Citadel Securities LLC: 0 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 0 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 0 4. Mr. Griffin: 0 1. Citadel Securities LLC: 11,086,363 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 11,443,163 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 683,200 4. Mr. Griffin: 12,126,363 1. Citadel Securities LLC: 0 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 0 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 0 4. Mr. Griffin: 0 1. Citadel Securities LLC: 11,086,363 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 11,443,163 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 683,200 4. Mr. Griffin: 12,126,363 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit 99.1 - Joint Filing Agreement Citadel Securities GP LLC /s/ Seth Levy 08/14/2025 Citadel Securities LLC /s/ Seth Levy 08/14/2025 Citadel Securities Group LP /s/ Seth Levy 08/14/2025 Citadel Advisors LLC /s/ Seth Levy 08/14/2025 Citadel Advisors Holdings LP /s/ Seth Levy 08/14/2025 Citadel GP LLC /s/ Seth Levy 08/14/2025 Kenneth Griffin /s/ Seth Levy 08/14/2025 * Seth Levy is signing on behalf of Kenneth Griffin as attorney-in-fact pursuant to a power of attorney previously filed with the Securities and Exchange Commission, and hereby incorporated by reference herein. The power of attorney was filed as an attachment to a filing by Citadel Advisors LLC on Schedule 13G for Allakos Inc. on October 13, 2023.