Citadel & Kenneth Griffin File Schedule 13G for IREN Limited, Ownership at 4.7%

Executive Summary

On September 30, 2026, Citadel Securities GP LLC, together with Kenneth Griffin and affiliated Citadel entities, filed a Schedule 13G regarding their holdings in IREN Limited (NASDAQ: IREN). The event date triggering the filing is reported as September 23, 2026.

Key Holdings & Ownership Breakdown

• Aggregate Beneficial Ownership (Kenneth Griffin): 18,687,938 ordinary shares (4.7% of the class)
• Citadel Securities Group LP & Citadel Securities GP LLC: 17,863,909 shares (4.5%)
• Citadel Securities LLC: 14,152,102 shares (3.6%)
• Citadel Advisors Entities: 824,029 shares (0.2%)
• Voting & Dispositive Power: All reported shares are held under shared voting and shared dispositive power; zero shares are held under sole power.

Material Observations

• Ownership 5% or Less (Item 5): The filing marks Item 5 as 'Yes' (<classOwnership5PercentOrLess>Y</classOwnership5PercentOrLess>), indicating the reporting persons' aggregate beneficial ownership has dipped below the 5% beneficial ownership reporting threshold (calculated at 4.7% based on 394,058,648 shares outstanding as of August 14, 2026).
• Filing Rule: The statement was filed under Rule 13d-1(c), certifying that the securities were acquired and held in the ordinary course of business without the purpose or effect of changing or influencing control of the issuer.