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ioneer Ltd filings document a foreign private issuer developing the Rhyolite Ridge Lithium-Boron Project in Nevada. Form 6-K reports include quarterly activities updates, federal permit and court disclosures, equity placement materials, securities quotation notices for ordinary shares, and investor presentations connected to the company’s lithium-boron development work.
The filing record also includes annual general meeting materials, proxy and voting procedures, a corporate governance statement, ASX Appendix 4G disclosures, and references to technical reporting under SEC Regulation S-K Subpart 1300. These documents address governance, capital structure, project economics, environmental and permitting matters, and risks associated with bringing Rhyolite Ridge toward production.
Ioneer Ltd reported that it has signed non-binding Memorandums of Understanding with Korea’s public infrastructure institution KIND and Hyundai Engineering to advance the Rhyolite Ridge Lithium-Boron Project in Nevada. KIND is considering an equity investment in the project, while Hyundai Engineering is considering providing procurement-related activities.
Ioneer has invested more than US$220 million in Rhyolite Ridge and completed over 70% of advanced engineering. The project is described as the only known lithium-boron reserve in North America and is expected to support 275–300 permanent jobs once operational. The company highlights a previously closed US$996 million U.S. Department of Energy loan and earlier offtake agreements with Ford, Prime Planet Energy & Solutions and EcoPro Innovation as part of the project’s commercial foundations.
The company emphasizes that these MOUs are non-binding and do not create legally enforceable obligations for KIND or Hyundai Engineering, and there is no certainty that definitive agreements or investments will follow.
ioneer Ltd Vice President Human Resources Kenneth D. Coon reported an open-market sale of 113,899 Ordinary Shares on July 2, 2026. According to the footnotes, the shares were sold for tax purposes related to vesting of performance units on July 1, 2026, at approximately AUD$0.1550 per share. Following the transaction, he holds 3,475,989 Ordinary Shares directly.
ioneer Ltd senior vice president of engineering operations Matthew Weaver reported an open-market sale of 251,293 Ordinary Shares on July 2, 2026. A footnote explains the shares were sold for tax purposes in connection with the vesting of performance units on July 1, 2026. After this transaction, Weaver directly holds 11,299,711 Ordinary Shares, indicating he retained the vast majority of his position.
ioneer Ltd Vice President of Corporate Development and External Affairs Chad Yeftich reported an open-market sale of 706,781 Ordinary Shares at $0.11 per share on July 2, 2026. A footnote explains these shares were sold for tax purposes in connection with the vesting of performance units on July 1, 2026.
Following this transaction, Yeftich directly holds 6,386,671 Ordinary Shares. The filing characterizes the sale as related to equity compensation rather than a discretionary change in ownership.
ioneer Ltd reported that VP Corp Dev & External Affairs Chad Yeftich acquired 203,751 Ordinary Shares as a compensation-related award. The shares were recorded at a price of $0.00 per share, indicating they were granted rather than bought in the open market.
According to a footnote, this reflects the conversion of 203,751 performance units into the right to receive an equal number of Ordinary Shares on July 1, 2026. After this award, Yeftich directly holds a total of 7,093,452 Ordinary Shares.
ioneer Ltd reported that Vice President of Human Resources Kenneth D. Coon acquired 150,926 ordinary shares on July 1, 2026 through a grant or award. This reflects performance units converting into the right to receive an equal number of ordinary shares. Following this transaction, Coon directly holds 3,589,888 ordinary shares.
ioneer Ltd reported that VP Commercial Sales & Marketing Nagai Yoshio acquired 159,982 Ordinary Shares on July 1, 2026 as a grant/award at no cash cost. The shares resulted from the conversion of 159,982 performance units into an equivalent right to receive Ordinary Shares, bringing his direct holdings to 8,095,472 shares.
ioneer Ltd senior vice president of engineering operations Matthew Weaver reported a compensation-related share award. On July 1, 2026, he acquired 391,277 Ordinary Shares at no cash cost, following the conversion of 391,277 performance units into the right to receive the same number of shares. After this award, he directly holds 11,551,004 Ordinary Shares.
Ioneer Ltd reports that it has received a conditional award from the U.S. Army for a long-term land lease at the Tooele Army Depot in Utah to develop a critical mineral processing facility. Ioneer is one of only four companies selected under this program.
The facility is intended to support a secure domestic boron supply chain, leveraging Ioneer’s construction-ready Rhyolite Ridge Lithium-Boron Project, which hosts a major undeveloped boron ore reserve. The leases use the Army’s Enhanced Use Lease model, where private lessees fund, build, operate, and decommission facilities without taxpayer dollars, with development targeted to begin as early as 2027 and initial operating capability by or before 2028.
Ioneer Ltd has entered into strategic, non-binding letters of intent with Korea’s public infrastructure investor KIND and Hyundai Engineering to help advance its Rhyolite Ridge Lithium-Boron Project in Nevada, described as the only known lithium-boron reserve in North America in active development.
Ioneer has invested more than $220 million in the project since 2016 and completed over 70% of advanced engineering. The company is targeting a Final Investment Decision in the second half of 2026, with first commercial production expected in 2029. Updated economics released in October 2025 forecast annual production of 27,800 tonnes of lithium hydroxide and 135,500 tonnes of boric acid.
Rhyolite Ridge is expected to create and support 275–300 permanent onsite jobs once operational and benefits from a US$996 million loan closed with the U.S. Department of Energy’s Office of Energy Dominance Financing in January 2025 and prior offtake agreements with Ford, Prime Planet Energy & Solutions, and EcoPro Innovation. The LOIs do not yet create binding obligations for KIND or Hyundai Engineering.