X0609 4 2026-07-01 0001896084 ioneer Ltd IONR 0002115562 Coon Kenneth D false C/O IONEER LTD 9460 DOUBLE R. BLVD, SUITE 200 RENO NV 85921 true Vice President Human Resources false Ordinary Shares 2026-07-01 4 A 0 150926 A 3589888 D This amount includes 150,926 ordinary shares underlying performance units held by the Reporting Person. On July 1, 2026, 150,926 performance units were converted into the right to receive 150,926 ordinary shares. Exhibit 24.1 - Power of Attorney /s/ April Hashimoto as Attorney-in-Fact for Kenneth D Coon 2026-07-06