Over the past decade, Canadian forestry companies have significantly expanded their footprint in the American lumber industry. While foreign investment remains a key component of a dynamic US economy, industry analysts and policymakers are increasingly scrutinizing the long-term implications of international control over critical domestic manufacturing infrastructure. Canadian-owned firms—including West Fraser, Canfor and Interfor—now operate dozens of sawmills in the US, with many holding more assets south of the border than in their home country. Additional Canadian firms—such as Tolko, Maibec, J.D. Irving, and Kruger—also maintain active operations and land holdings throughout the country. As foreign ownership of US lumber mills grows, several key concerns are emerging: Supply Chain Autonomy… Economic Retention… Market Influence. …Industry stakeholders are urging a closer examination of the issue. Policy suggestions include incentivizing domestic ownership, increasing sourcing transparency, and evaluating regulatory frameworks around foreign investment in strategic industries.