Global mining investment firm Orion Resource Partners has completed the final close of its Mine Finance Fund IV, raising about $2.2-billion in what the company described as its largest fund to date.

The fund will focus on providing financing solutions for the construction and acquisition of strategic metals and critical minerals projects.

Following the close, Orion’s total assets under management have surpassed $9-billion, reflecting growth across the firm’s broader investment platform.

Fund IV attracted commitments from a diversified international investor base, including pension funds, sovereign wealth funds and other institutional investors. Orion said the fund is already 61% committed across projects in North and South America, Europe, Australasia and Africa, with early distributions already made to investors.

The close follows a series of initiatives aimed at expanding Orion’s presence across the critical minerals value chain, including the launch of the Orion Critical Mineral Consortium in partnership with the US government, which secured $1.8-billion in committed capital in October 2025.

The firm also established Orion Abu Dhabi, a $1.2-billion partnership with ADQ aimed at investing in and securing supply of strategic metals and critical minerals.

In addition, Orion recently announced a partnership with SNB Capital to support the development of Saudi Arabia’s mining sector and improve access to critical commodities.

Founder and group CEO Oskar Lewnowski said the past year marked a significant period of growth for the firm as global demand for critical minerals accelerated.

“As global demand for critical minerals and strategic metals has continued to accelerate, we have seen growing engagement from sovereign investors and strategic partners who recognize the strength of our platform and our long-standing capabilities across the mining and metals value chain,” he said.

Managing partner and chief investment officer for mine finance Istvan Zollei said the strong investor support highlighted the increasing strategic importance of critical minerals and Orion’s position in financing projects across the sector.

“With Fund IV, we are exceptionally well positioned to continue identifying and executing opportunities across assets critical to the global economy, including copper, lithium and other essential metals,” he said.