GAO Report Reveals Gaps in Oversight of Foreign Investment in US Mining

Foreign Investment in US Mining: A Critical Minerals Supply Chain Vulnerability

The Government Accountability Office (GAO) has issued a report revealing significant gaps in the oversight of foreign investment within the US critical minerals supply chain, specifically concerning mining operations on federal lands. The findings, released on October 16, 2026, underscore a potential vulnerability stemming from incomplete data on ownership and financial interests, particularly those linked to potential adversary nations like China.

The Current Landscape of US Mining and Critical Minerals

The US critical mineral supply chain is constrained by substantial capital investment needs and limited domestic processing capacity, according to the GAO. The report highlights a significant reliance on exports: domestically extracted ore is routinely shipped to Canada, Mexico, and China, among other countries. As of February 2026, 632 hardrock mining plans of operation were active on federal land, overseen by the Bureau of Land Management (BLM) and the Forest Service. These operations are vital for securing resources like copper, lithium, and zinc – essential components in advanced technologies.

Foreign Ownership and Financial Interests

The 1872 Mining Law stipulates that mining claimants must be US citizens or businesses incorporated in the US. However, the law allows foreign businesses to comply by establishing a US subsidiary. The GAO reviewed ownership information for 43 claimants and operators associated with critical mineral mines and was able to determine ownership for 32 of those companies. Of these, 14 were identified as subsidiaries of foreign entities, representing 44% of the companies with determined ownership. While none of these 14 subsidiaries were directly owned by Chinese companies, the GAO identified financial interests held by Chinese entities in the parent companies of at least two of them.

Data Gaps and Regulatory Shortcomings

A critical finding of the GAO report is the lack of comprehensive data collection regarding foreign ownership. The 1872 Mining Law does not require the BLM or Forest Service to collect information on foreign parent companies or to track foreign ownership interests. This regulatory gap hinders a complete understanding of the extent of foreign influence within the US critical minerals supply chain. While other federal agencies, such as the Committee on Foreign Investment in the United States (CFIUS), have authority to review foreign investment for national security concerns, the report suggests a need for improved coordination and data sharing.

Export Volumes and Supply Chain Dynamics

The report also details the export of extracted critical minerals from the US between 2019 and 2025. While specific export figures are not included in the provided excerpt, the acknowledgment of significant export volumes underscores the potential for reliance on foreign processing and manufacturing capabilities, further exacerbating supply chain vulnerabilities. The US exports large quantities of domestically extracted ore, and the destination countries are not limited to traditional allies.

Strategic Implications and National Security Concerns

The GAO’s findings raise significant national security concerns. The presence of foreign ownership, even through subsidiaries, and the financial involvement of entities from potential adversary nations in US critical mineral mining operations create potential avenues for disruption or control. This is particularly relevant given the increasing demand for these minerals from strategic sectors such as defense and advanced technology. The lack of comprehensive data makes it difficult to assess the full extent of these risks and to implement targeted mitigation strategies.

Looking Ahead: Recommendations and Oversight

The GAO report does not detail specific recommendations, but the findings strongly suggest a need for enhanced oversight and data collection. Strengthening the requirements for disclosing foreign ownership and financial interests within the 1872 Mining Law, as well as improving interagency coordination on foreign investment review, are crucial steps. Increased transparency and a more complete understanding of foreign involvement in US mining operations are essential to safeguard the nation's critical mineral supply chain and protect national security interests.

The report’s findings are timely, occurring amidst a global scramble for critical mineral resources and increasing geopolitical tensions. They highlight the urgent need for proactive measures to secure US access to these vital materials and reduce dependence on potentially unreliable sources. The ongoing debate around domestic processing capacity and diversification of supply chains is directly informed by the vulnerabilities exposed in this GAO assessment.