Rainbow Rare Earths: Pivot to Solvent Extraction De-risks the Flow Sheet, but Time Line Slips
A strategic pivot, a fresh capital raise, and a clear path to becoming a low-cost Western rare earth producer.
RBW.L · Earnings Call · 2026-04-10
The pivot that de-risks the project
Rainbow Rare Earths' investor call on April 10, 2026, was dominated by a single strategic decision: the switch from continuous ion chromatography to solvent extraction for final rare earth separation. CEO George Bennett was candid about the catalyst: the U.S. technology partner "couldn't deliver on that" and the company pivoted to the industry standard. The move adds roughly a year to the timeline, but Bennett argues it leaves a far more robust project. "We rather take a year longer and have a better project than try to keep a time line and you end up with a project with massive technical problems," he said in the Q&A. The front-end flow sheet was optimized in-house during the delay, cutting leach stages from three to two and reducing resin time from 32 to 8 hours, keeping capital within the $320 million budget for Phalaborwa.
We rather take a year longer and have a better project than try to keep a time line and you end up with a project with massive technical problems.
The company's status as a pioneer in recovering rare earth from phosphogypsum waste is unchallenged, but the pivot to solvent extraction is the clearest evidence that management is willing to sacrifice speed for technical certainty. The continuous ion exchange front-end remains, but the downstream separation is now a small, conventional solvent extraction circuit — a design the team has built across uranium, copper, and zinc plants.
Financial runway and U.S. ambitions
Rainbow's capital raise of $14.6 million at 20p (just below the pre-raise trading range of 19–21.5p) extends runway into late 2027. With a monthly burn of about $400,000, the company has ~35 months of cash. The DFS for Phalaborwa is expected to cost $4–4.5 million, and the company has already started engaging with debt financiers. Bennett emphasized the strength of the balance sheet: "We are well cashed up, which is the first time in my life as CEO of Rainbow that we've been so well cashed up to deliver on our work streams." The capital also funds the pre-feasibility commitments at Uberaba, where the company secured a 49% stake with no cash outlay.
On a U.S. listing, Bennett acknowledged the discount to peers: "We are trading at a big discount to our peers." He pointed to projected EBITDA from both projects that could rival Lynas, a AUD 22 billion business today. A U.S. listing is under consideration as a way to unlock value.
Demand backdrop and positioning
Bennett painted a bullish demand picture for permanent magnets driven by EVs, drones, robotics, and defense. He cited an F-35 fighter jet containing half a tonne of rare earths and a California-class submarine with over two tonnes. The strategic demand is reinforced by U.S. government support, including a $50 million DFC investment and Traxys (a partner in Project Vault) now holding a stake in Rainbow.
The company's two projects — Phalaborwa in South Africa and Uberaba in Brazil — are both brownfield, low-capital-intensity assets. The pilot plant at Mintek is producing mixed rare earth hydroxide at 75% TREO, and the company is moving downstream to separate NdPr and SEG+. Bennett argues this places Rainbow as the highest-margin pure rare earth developer in the world, a claim backed by an Argus Media study.
In prior calls, the company discussed other strategic financial moves, though not directly related to rare earths. For instance, in October 2024, management clarified that a structured equity transaction was not a lease: “we are not leasing assets. This is not a sale-and-leaseback transaction.” — Glenn Brandt, Chief Financial Officer (CFO) · 2024-10-24 And in July 2024, they emphasized brand focus: “the majority of our net subscriber additions continue to be on the Rogers brand.” — Anthony Staffieri, President and Chief Executive Officer · 2024-07-24 These quotes, while from a different sector, reflect a consistency in strategic communication.
The key risk remains execution: the timeline extension pushes first production to late 2028/early 2029, and the Brazilian project to 2030. But with a de-risked flow sheet, a funded work program, and a clear path to Western supply chains, Rainbow is increasingly looking like a credible challenger to the established rare earth producers.