Ioneer signed non-binding LOIs with KIND and Hyundai for its Rhyolite Ridge lithium-boron project. The FID target is 2H26, but the agreements must convert to binding MOUs by July 2026 to matter.
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Ioneer (ASX: INR) signed non-binding letters of intent with Korea Overseas Infrastructure & Urban Development Corporation (KIND) and Hyundai Engineering. The agreements target a final investment decision for the Rhyolite Ridge lithium-boron project in the second half of 2026.
The LOIs are non-binding. That means they signal interest without capital commitments. Ioneer said it expects the agreements to progress into memorandums of understanding in July 2026. The shift from LOI to binding MOU will be the first real test of whether KIND and Hyundai are willing to put equity, structured financing, or engineering services behind the project.
Rhyolite Ridge sits within broader US critical minerals policy. Ioneer already has a US$996 million loan from the Department of Energy’s Office of Energy Dominance Financing, closed in January 2025. The company has invested more than US$220 million since 2016 and completed over 70% of advanced engineering work. Planned output is 27,800 tonnes per annum of lithium hydroxide and 135,500 tonnes per annum of boric acid. First commercial production is expected in 2029.
The project still carries a legal overhang. The federal permit was upheld by the US District Court for Nevada on 31 March 2026. Plaintiffs appealed to the Ninth Circuit on 9 April 2026. Ioneer said it does not expect the appeal to delay construction. The court is expected to rule in mid-2027, according to prior filings. That timeline sits after the targeted FID, meaning the permit could be challenged while construction is underway.
Ioneer also has a broader strategic partnering process running alongside these LOIs. The company launched that process in June 2025 and said it expects it to conclude by the end of the June quarter. Ioneer has indicated a consortium outcome is more likely than a single partner. Today’s LOIs appear to sit within that wider effort.
Cash runway and dilution risk are worth tracking as the project shifts from studies toward development. The March quarter included no production or development activities. Ioneer’s filings point to execution timing and future capital needs as relevant factors if additional funding is required later in the build-out.
The next concrete milestone is July 2026, when the LOIs are expected to convert into MOUs. Whether those MOUs contain binding commitments around equity, financing, or engineering delivery will determine if the strategic layer actually reduces the project’s risk profile.
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