A sweeping investigation by the U.S. Government Accountability Office (GAO) has brought to light mounting vulnerabilities regarding international ownership and financial stakes in domestic critical mineral extraction projects situated on federal properties.

Published on October 16 under the title Critical Minerals: Limited Available Information on the Full Extent of Foreign Investment in Mining on Federal Lands, the 19-page assessment highlights a critical regulatory blind spot. Because current mining regulations do not compel enterprises to unveil foreign backing for operations on public land, the true magnitude of overseas control remains largely obscured. Nonetheless, investigators successfully tracked down operating entities functioning as subsidiaries of international corporations—some of which maintain direct investments originating from Chinese entities.

The Bureau of Land Management alongside the Forest Service oversees hardrock mining initiatives across these federal territories. Yet, this recent parliamentary and administrative scrutiny underscores a profound paradox: ventures explicitly designed to insulate the United States from import vulnerabilities are frequently propelled by non-American stakeholders. Essential elements like copper, lithium, and zinc form the backbone of next-generation technologies despite operating within fragile supply chains.

“As demand for these minerals increases, U.S. access to critical minerals has become a prominent topic in both domestic policymaking and international relations. Recently, the administration and Congressional entities have expressed concerns over the role of potential adversary nations, such as the People’s Republic of China (China), in the U.S. supply chain of critical minerals,” the GAO emphasized. Although statutory frameworks traditionally stipulate that exclusive extraction claims on public lands must go to American citizens or locally incorporated companies, corporate structuring often bypasses these intents.

Mapping International Owners Across Public Territory

Out of 43 claimants and operators linked to critical mineral sites on federal grounds reviewed by investigators, ownership profiles could only be definitively mapped for 32. Strikingly, nearly half—totaling 14 firms—operated as direct subsidiaries of foreign parents.

These international actors span diverse phases of hardrock mining, encompassing initial exploration alongside active production of commodities such as copper, gold, magnesium, and zinc.

“Foreign parent companies identified by our analysis were companies located in Canada, Australia, United Kingdom, Poland, Curaçao, and Ireland,” the federal watchdog reported. “Although we did not identify instances of companies from potential adversary countries that had U.S. subsidiaries with approved mining plans on federal lands, we did find that some foreign parent companies may have financial interest from these countries, specifically China.”

The investigation further mapped specific structural complexities:

  • A domestic copper producer cataloged in state and BLM registries as a homegrown venture was revealed via its corporate website to be fully owned by a Polish parent entity.
  • A U.S. subsidiary managing a crucial mineral deposit maintained a British parent company which itself featured an 11% ownership stake held by a Chinese state-owned enterprise.
  • An operational critical mineral site managed through a Canadian-owned subsidiary faced additional complications after discovering a Chinese firm held a 12% stake in the Canadian parent, alongside shared board representation.
  • A zinc extraction site officially logged as a domestic entity in public databases operated under an Australian parent, which was subsequently acquired by a Canadian firm that assumed ultimate control.

Hardrock Extraction Hubs in the American West

Domestically sourced critical minerals heavily anchor the national economy, with copper alone accounting for 23% of total domestic output—translating to a record valuation of $11 billion from the one million metric tons produced in 2025.

“Many critical minerals are extracted through hardrock mining and are essential for advanced technologies supporting energy, transportation, national defense and security, health care, and consumer electronics. According to a Congressional Research Service report, a growing number of critical minerals are vital components for semiconductors, including microchips,” the GAO noted.

Active Mining Operations Under Review

Federal records show that by February, the nation maintained 632 authorized hardrock mining plans of operation on public terrain, with 90% dedicated to non-critical substances and the remaining 10% targeting critical minerals.

Geographically, these extraction blueprints concentrate heavily in Nevada, California, and Wyoming. Compounding current oversight anxieties is the longstanding legal reality that allows claim holders to potentially perpetuate their extraction rights indefinitely on federal acreage.