and Exhibit 99.1 attached hereto shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Other Events. On August 4, 2026, the Company filed with the Securities and Exchange Commission (the “SEC”) a prospectus supplement to the prospectus included in the Company’s registration statement on Form S-3 POSASR originally filed with the SEC on Form F-3 (Reg. No. 333-284369) on January 21, 2025 and as amended by post-effective amendment on Form S-3 on August 25, 2025 (as so amended, the “Registration Statement”), covering the resale from time to time by certain selling shareholders of up…

and Exhibit 99.1 attached hereto shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

The Board approved significant equity grants to the Co-CEOs as part of a long-term retention and incentive strategy.

by reference. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. IREN LIMITED By: /s/ Daniel Roberts Daniel Roberts Co-Chief Executive Officer and Director Date: June 1, 2026

Entry Into a Material Definitive Agreement. Financing Agreements Following previous disclosure by IREN Limited (the “Parent”), IE US Hardware 3 LLC (“Hardware 3”), a wholly owned subsidiary of the Parent, has entered into certain financing agreements, each dated May 29, 2026 (collectively, the “Financing Agreements”), for an aggregate financing of approximately $3.6 billion, comprised of (i) an approximately $1.5 billion delayed draw term loan facility (the “DDTL”) pursuant to a credit agreem…

Entry Into a Material Definitive Agreement. Dell Purchase Agreement On May 19, 2026, IE US Hardware 4 Inc. (“IE US Hardware”), a wholly owned subsidiary of IREN Limited (the “Company”), and Dell Marketing L.P. (“Dell”) entered into purchase documentation (the “Dell Purchase Agreement”) pursuant to which Dell will supply to IE US Hardware GPUs and ancillary products and services (“GPUs”) for an aggregate purchase price of approximately $1.6 billion payable in installments within 30 days of eac…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The information set forth in

The Convertible Notes were issued to the initial purchasers in reliance upon Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”), in transactions not involving any public offering. The Convertible Notes were resold by the initial purchasers to persons whom the initial purchasers reasonably believe are “qualified institutional buyers,” as defined in, and in accordance with, Rule 144A under the Securities Act. Any ordinary shares that may be issued upon conversion o…

Other Events Capped Call Unwind Transaction In connection with the issuance of the Company’s 3.50% Convertible Senior Notes due 2029 (the “2029 Notes”), the Company entered into capped call transactions (the “2029 Capped Call Transactions”) with certain financial institutions (the “2029 Option Counterparties”). In November 2025, the Company entered into a transaction pursuant to which a portion of the 2029 Notes were equitized (the “Equitized 2029 Notes”). In connection with the pricing of th…

Entry Into a Material Definitive Agreement Indenture and Convertible Notes On May 14, 2026 (the “Closing Date”) , IREN Limited (the “Company”) issued $3.0 billion principal amount of its 1.00% Convertible Senior Notes due 2033 (the “Convertible Notes”). The Convertible Notes were issued pursuant to, and are governed by, an indenture (the “Indenture”), dated as of the Closing Date , between the Company and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”). Pursuant to t…

Other Events On May 12, 2026, the Company issued a press release announcing the pricing of its offering of $2.6 billion in aggregate principal amount of its 1.00% Convertible Senior Notes due 2033 (the “Convertible Notes”). The Convertible Notes will only be sold to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”). The Company also granted to the initial purchasers of the Convertible Note…

and Exhibit 99.1 attached hereto shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

and Exhibit 99.1 attached hereto shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Entry Into a Material Definitive Agreement. Dell Purchase Agreements On March 4, 2026, IE CA Leasing Ltd. (“IE CA Leasing”), a wholly owned subsidiary of IREN Limited (the “Company”), and Dell Canada Inc. (“Dell Canada”) entered into purchase documentation (the “Dell Canada Purchase Agreement”) pursuant to which Dell Canada will supply to IE CA Leasing GPUs and ancillary products and services, scheduled to be delivered in phases during the second half of 2026, for an aggregate purchase price…

Other Events As previously announced, IREN Limited (the “Company”) entered into an amended and restated At Market Issuance Sales Agreement, dated as of August 28, 2025 (the “Sales Agreement”), with B. Riley Securities, Inc., Canaccord Genuity LLC, Cantor Fitzgerald & Co., Citigroup Global Markets Inc., Compass Point Research & Trading, LLC, J.P. Morgan Securities LLC, Macquarie Capital (USA) Inc. and Roth Capital Partners LLC, as sales agents, to which Citizens JMP Securities, LLC, Goldman Sa…

and Exhibit 99.1 attached hereto shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

The Notes were issued to the initial purchasers in reliance upon Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”), in transactions not involving any public offering. The Notes were resold by the initial purchasers to persons whom the initial purchasers reasonably believe are “qualified institutional buyers,” as defined in, and in accordance with, Rule 144A under the Securities Act. Any ordinary shares that may be issued upon conversion of the Notes will be issu…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The information set forth in

Entry Into a Material Definitive Agreement Indentures and Notes On December 8, 2025 (the “Closing Date”) , IREN Limited (the “Company”) issued $1.15 billion aggregate principal amount of its 0.25% convertible senior notes due 2032 (the “2032 Notes”) and $1.15 billion aggregate principal amount of its 1.00% convertible senior notes due 2033 (the “2033 Notes” and, together with the 2032 Notes, the “Notes,” and the offering of such Notes, the “Notes Offering”). The 2032 Notes were issued pursuan…

Other Events Equity Offering On December 2, 2025, the Company entered into certain share purchase agreements, by and between the Company and certain purchasers (the “Purchasers” and, such agreements, the “Purchase Agreements”), pursuant to which the Company agreed to sell 39,699,102 ordinary shares in a registered direct offering at a price of $41.12 per share (the “Equity Offering”). The issuance and sale of 39,699,102 ordinary shares was completed on December 8, 2025. The sale of ordinary s…

Other Events On December 3, 2025, IREN Limited issued a press release announcing that it had priced its private offering of convertible notes and a press release announcing that it had priced its registered direct offering of ordinary shares to fund the repurchase of convertible notes. A copy of these press releases are filed as Exhibits 99.1 and 99.2, respectively, to this Current Report on Form 8-K and incorporated herein by reference. This Current Report on Form 8-K and the press releases…

Other Events On December 1, 2025, IREN Limited issued a press release announcing an offering of convertible notes and a press release announcing a registered direct offering of ordinary shares to fund the repurchase of convertible notes. A copy of each of these press releases is attached hereto as Exhibits 99.1 and 99.2, respectively, which are incorporated herein by reference. This Current Report on Form 8-K and the press releases attached hereto as Exhibits 99.1 and 99.2 do not constitute a…

Changes in Registrant’s Certifying Accountant. On November 27 , 2025, KPMG LLP (“KPMG”) was appointed as the independent registered public accounting firm of IREN Limited (the “Company”), effective November 27 , 2025, upon recommendation by the Audit and Risk Committee to the Company’s board of directors (the “Board”) and the approval of the Board. During the Company’s fiscal years ending June 30, 2025 and June 30, 2024 and through November 27 , 2025, neither the Company, nor anyone on its be…

Material Modification to Rights of Security Holders. As more fully described under