Toronto-based investment firm Kinterra Capital has completed the acquisition of Australia’s New World Resources, gaining control of the high-grade Antler copper project in Arizona and announcing a review of new processing technologies to bolster domestic copper output.

“Including Antler, Kinterra now controls approximately 175 000 tonnes of annual copper production capacity across its US portfolio – from Antler in Arizona, White Pine in Michigan and Pumpkin Hollow and the adjacent Southwest openpit in Nevada,” said Kinterra co-managing partner Cheryl Brandon.

“This acquisition strengthens our role as a cornerstone contributor to America's copper industry. Our strategy expects to deliver a secure source of copper supply into the power grid, clean energy industries, and technology applications.”

New World’s flagship Antler project is a past-producing underground mine in western Arizona boasting an average grade of 3.8% copper equivalent. The company also holds two early-stage copper exploration assets in Arizona and New Mexico.

“With an average grade of 3.8% copper equivalent, Antler ranks among the highest-grade underground copper development projects globally,” said Kinterra co-managing partner Kamal Toor. “Its combination of exceptional grade, capital efficiency and strategic location makes it capable of materially contributing to near-term US copper supply.”

In tandem with the acquisition, Kinterra announced it had launched an initiative to evaluate sulphide leach processing technologies that could enable production of refined copper cathode within the US. The review will focus on adapting established leaching methods to process sulphide ores across Kinterra’s portfolio.

“Kinterra is working to help shape a balanced domestic processing strategy – one that aligns industrial policy with market competitiveness,” Toor said. “By assessing next-generation leach technologies, we intend to unlock value from our resource base and keep more of the copper value chain in the US.”

The company said it had begun engaging with leading technology developers, with pilot testing expected to start in early 2026.