Ioneer (NASDAQ: IONR) signs non-binding MOUs with KIND and Hyundai for Rhyolite Ridge
Filing Impact
Filing Sentiment
Form Type
6-K
Rhea-AI Filing Summary
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.
Positive
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Insights
Non-binding MOUs bring strategic Korean partners to Rhyolite Ridge but do not yet commit capital.
The update shows Ioneer aligning Rhyolite Ridge with Korean institutions focused on overseas infrastructure and critical minerals. KIND is evaluating a potential equity investment, and Hyundai Engineering is considering procurement roles, tying the project into Korea’s broader energy and industrial strategy.
Rhyolite Ridge already has substantial backing, including a US$996 million loan from the U.S. Department of Energy and more than US$220 million invested by Ioneer, plus offtake agreements with Ford, Prime Planet Energy & Solutions and EcoPro Innovation. These elements indicate an advanced development stage and established customer interest.
However, the MOUs are explicitly non-binding and create no enforceable obligations, so they mainly signal intent and strategic alignment rather than finalized funding or EPC contracts. Actual impact will depend on whether these understandings progress to definitive agreements and a Final Investment Decision referenced by the company.
Key Figures
Ioneer investment in Rhyolite Ridge: US$220 million
DOE project loan: US$996 million
Advanced engineering completion: More than 70%
+2 more
5 metrics
Ioneer investment in Rhyolite Ridge
US$220 million
Invested in the project since 2016
DOE project loan
US$996 million
Loan closed with DOE’s Office of Energy Dominance Financing in January 2025
Advanced engineering completion
More than 70%
Portion of advanced engineering work completed for Rhyolite Ridge
Expected permanent jobs
275–300 positions
Permanent roles anticipated in rural Nevada once operational
Offtake agreements
3 counterparties
Agreements with Ford, Prime Planet Energy & Solutions, and EcoPro Innovation
Key Terms
Memorandums of Understanding, Final Investment Decision, offtake agreements, critical minerals, +1 more
5 terms
Memorandums of Understanding financial
"announced the signing of non-binding Memorandums of Understanding (each a "MOU")"
A memorandum of understanding (MOU) is a written outline where two or more parties record their mutual intentions and basic terms for a potential deal, acting like a formal handshake or a roadmap rather than a final contract. Investors watch MOUs because they signal possible future partnerships, projects, or transactions that could affect revenue or strategy, but they are usually not legally binding and don’t guarantee the outcome.
Final Investment Decision financial
"we are one step closer to a Final Investment Decision and to delivering this"
A final investment decision is the point at which a person or organization chooses to move forward with a particular project or purchase after reviewing all the necessary information and options. It is like deciding to buy a house after considering all the costs, benefits, and alternatives. This decision is important because it determines whether and when the investment will be made, impacting future financial plans and outcomes.
offtake agreements financial
"Ioneer signed separate offtake agreements with Ford Motor Company and Prime Planet Energy & Solutions"
An offtake agreement is a contract where a buyer agrees to purchase a set amount of a company's future production—such as minerals, energy, or manufactured goods—often before the product is made. For investors, these deals act like a guaranteed customer or advance order that reduces sales risk, helps secure project financing, and makes future revenue more predictable; think of it as a long-term subscription that stabilizes cash flow.
critical minerals financial
"securing a reliable critical minerals supply chain for the industries we serve"
Materials needed to build modern technologies—like batteries, electronics, renewable energy systems and defense equipment—that have few easy substitutes and often come from a small number of countries or mines. Investors care because their supply can be disrupted, expensive or slow to increase, which affects the cost, availability and growth prospects of companies and industries that rely on them; think of them as critical spare parts for the global economy.
public-private partnership ("PPP") financial
"advancing overseas infrastructure and public-private partnership ("PPP") projects by providing equity investment"
FAQ
What did Ioneer (IONR) announce regarding the Rhyolite Ridge project?
Ioneer announced non-binding MOUs with KIND and Hyundai Engineering to advance the Rhyolite Ridge Lithium-Boron Project. KIND is considering an equity investment, while Hyundai Engineering is considering procurement-related roles, potentially strengthening technical and financial support if definitive agreements are later reached.
Are the MOUs with KIND and Hyundai Engineering legally binding for Ioneer (IONR)?
The MOUs are explicitly non-binding and do not create legally enforceable obligations for KIND or Hyundai Engineering. They express intent to explore equity investment and procurement participation, but there is no certainty that binding contracts, investments, or long-term commitments will ultimately be executed.
How advanced is Ioneer’s Rhyolite Ridge Lithium-Boron Project?
Ioneer states it has invested more than US$220 million in Rhyolite Ridge and completed over 70% of advanced engineering. The project has a final federal permit, a US$996 million DOE loan, and several lithium offtake agreements, indicating an advanced development stage before full construction.
What economic impact does Ioneer expect from Rhyolite Ridge in Nevada?
Once operational, Rhyolite Ridge is expected to create and support 275 to 300 permanent jobs in rural Nevada. The project will process ore into final products entirely on-site, positioning it as a long-term employer and industrial hub within Nevada’s emerging lithium supply chain.
Why are KIND and Hyundai Engineering interested in Ioneer’s Rhyolite Ridge project?
KIND and Hyundai Engineering link the project to critical mineral supply and Korean-U.S. economic cooperation. KIND highlights its mandate to support overseas infrastructure and critical mineral investments, while Hyundai Engineering views participation as a way to secure reliable supply for industries and expand its energy-transition portfolio.
What prior funding has Ioneer (IONR) secured for Rhyolite Ridge?
Ioneer reports that Rhyolite Ridge closed a US$996 million loan with the U.S. Department of Energy’s Office of Energy Dominance Financing in January 2025. Alongside more than US$220 million invested by Ioneer, this loan forms a key part of the project’s financing base for development.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER
Pursuant to Rule 13a-16 or 15d-16 of the
Securities Exchange Act of 1934
For the month of July 2026
Commission File Number: 001-41412
ioneer Ltd
(Translation of registrant’s name into English)
Suite 16.01, 213 Miller Street
North Sydney, NSW, 2060, Australia
(Address of principal executive offices)
Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F ☒ Form 40-F ☐
EXHIBIT INDEX
The following exhibits are filed as part of this Form 6-K:
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Exhibit
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Description
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99.1
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Press Release
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SIGNATURE
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, thereunto duly authorized.
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ioneer Ltd
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(registrant)
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Date: July
8, 2026
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By: |
/s/
April Hashimoto
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April
Hashimoto
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| Title: |
Chief Financial Officer
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Exhibit 99.1
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Ioneer Signs MOUs with KIND and
Hyundai Engineering to Advance
Rhyolite Ridge Lithium-Boron Project
8 July 2026 – SYDNEY, Australia – Ioneer Ltd ("Ioneer" or "Company") (ASX: INR, NASDAQ: IONR) announced the signing of non-binding Memorandums of Understanding (each a "MOU") with the Korea Overseas Infrastructure & Urban Development Corporation ("KIND"), the Republic of Korea’s specialized public institution mandated by the Ministry of Land, Infrastructure and Transport ("MOLIT"), and Hyundai Engineering Co. Ltd. ("Hyundai Engineering"), a leading Korean and international engineering, procurement and construction company, to advance the development of the Rhyolite Ridge Lithium-Boron Project ("Project" or "Rhyolite Ridge").
Since 2016, Ioneer has invested more than US$220 million in Rhyolite Ridge and completed more than 70% of its advanced engineering work. It hosts the only known lithium-boron reserve in North America, one of two globally, and is the only project of its kind in active development. Once operational, Rhyolite Ridge will process ore into final products entirely on-site and create and support 275 to 300 permanent positions in rural Nevada.
Under the MOUs, KIND is considering making an equity investment in the Project, and Hyundai Engineering is considering the provision of certain procurement-related activities in connection with the Project. The MOUs reflect Rhyolite Ridge's strategic value for both the United States and the Republic of Korea, and its role as a cornerstone of America's efforts to secure a domestic supply of urgently needed critical minerals.
"KIND and Hyundai Engineering bring proven expertise and a shared commitment to delivering critical minerals projects. Together, we are closer than ever to breaking ground at Rhyolite Ridge and bringing urgently needed lithium and boron to the market," said Bernard Rowe, Managing Director, Ioneer. "We look forward to what we will accomplish together."
"KIND is pleased to deepen the strategic and economic partnership between the Republic of Korea and the United States through this MOU," said Chris Soeung Kim, Director of plant business division, KIND. "We have been actively advancing investments in U.S. energy, infrastructure and critical minerals, and Rhyolite Ridge is exactly the kind of investment that serves our mandate."
"Across the metrics that matter most – permitting, construction readiness, and long-term supply certainty – Rhyolite Ridge stands apart from other critical mineral projects," said Seung Dong Lee, Head of process plant business execution office, Hyundai Engineering. "This MOU to participate in the engineering, procurement and design reflects our intent to pursue shared interests, securing a reliable critical minerals supply chain for the industries we serve and our confidence in Ioneer’s leadership."
"These MOUs reflect the strength and maturity of Rhyolite Ridge. With the entry into MOUs with KIND and Hyundai Engineering, we are one step closer to a Final Investment Decision and to delivering this once-in-a-generation asset for U.S. critical minerals production," said James Calaway, Executive Chairman, Ioneer.
The MOUs are non-binding and do not create legally enforceable obligations on the part of KIND and Hyundai Engineering to invest in or otherwise support the development of Rhyolite Ridge. There can be no certainty that legally binding arrangements will be entered into.
Pictured at the July 7 signing ceremony, left to right (first row): Kim, Bokhwan, CEO & president, KIND; James Calaway, Executive Chairman, Ioneer; Lee, Seung Dong, VP, Head of Process Plant Business Execution Office, Hyundai Engineering. Left to right (second row): Kyle Haustveit, Undersecretary of Energy, U.S. Department of Energy; Kim, Yi-tak, Vice Minister, MOLIT.
—ENDS—
About Ioneer
Ioneer Ltd. is an emerging lithium–boron producer and the 100% owner of the Rhyolite Ridge Lithium-Boron Project. Rhyolite Ridge is one of only a small number of lithium-boron ore deposits globally and a linchpin project in Nevada’s burgeoning Lithium Loop.
Rhyolite Ridge closed a US$996 million loan with the DOE's Office of Energy Dominance Financing in January 2025. In October 2024, Ioneer received the final federal permit for the Project from the Bureau of Land Management, concluding the formal federal permitting process which began in early 2020. Ioneer signed separate offtake agreements with Ford Motor Company and Prime Planet Energy & Solutions (joint venture between Toyota and Panasonic) in 2022 and Korea’s EcoPro Innovation in 2021.
To learn more about Ioneer, visit www.Ioneer.com/investors or join our online communities on X, Facebook, LinkedIn, Instagram and YouTube.
About KIND
The Korea Overseas Infrastructure & Urban Development Corporation is a specialized public institution established under the Ministry of Land, Infrastructure and Transport of the Republic of Korea. KIND is mandated to support Korean companies in advancing overseas infrastructure and public-private partnership ("PPP") projects by providing equity investment, structured financing, and project development support.
KIND operates across a broad range of sectors including transportation, energy, urban development, and critical minerals, in partnership with multilateral development banks, commercial banks, governments, and private developers. As a dedicated PPP investment institution, KIND plays a central role in expanding Korea's overseas infrastructure footprint while advancing bilateral economic cooperation with partner nations.
For more information, visit www.kindkorea.or.kr.
About Hyundai Engineering
Hyundai Engineering Co. Ltd. is evolving into a technology-driven energy solutions provider, expanding beyond traditional EPC services into the full energy value chain — from project development and financing to operations.
Building on its strong foundation in global plant engineering, Hyundai Engineering delivers end-to-end plant services from FEED to EPC, while continuously executing complex industrial and infrastructure projects and strengthening its position in advanced industrial facilities.
In response to the global energy transition, Hyundai Engineering is accelerating its expansion into low-carbon and next-generation energy sectors, including LNG, solar power, and nuclear. Hyundai Engineering is actively advancing key future technologies such as SMRs, hydrogen production, and carbon capture, while also growing new businesses in electric vehicle charging and modular construction.
Through these initiatives, Hyundai Engineering is transforming into a comprehensive energy and infrastructure company, creating sustainable value across the entire lifecycle of projects and positioning itself at the forefront of the global energy transition.
Investor Relations
Chad Yeftich, Ioneer USA Corporation
Investor Relations
ir@ioneer.com
+1 775 993 8563
Media Relations
FGS Global
ioneer@fgsglobal.com