ST. LOUIS (October 19, 2026) – The Doe Run Company (Doe Run) has released its 17th annual Sustainability Report, highlighting how the company balances its social, economic, and environmental responsibilities while delivering a sustainable supply of critical minerals for today and for generations to come.  The 2025 report details tactics the company is proposing to get more from the minerals in Doe Run’s care, strengthen the company’s long-term operations, and support domestic critical mineral supply.

The report comes as the importance of domestic mineral production continues to grow. The U.S. Geological Survey’s final 2025 Critical Minerals List includes the three minerals Doe Run currently produces from its Southeast Missouri mining operations: lead, zinc, and copper. The list identifies 60 minerals considered vital to the U.S. economy and national security that face potential supply-chain risks. With that designation, every mineral Doe Run produces is now considered critical, making the responsible, efficient recovery of these finite resources more important than ever.

“Our responsibility is to get the most value possible from the minerals in our care while protecting our employees, our communities, and the environment,” said Matthew Wohl, President and CEO of The Doe Run Company. “The work covered in this report shows how innovation can help us do both. By improving how we recover and process minerals, we can reduce waste, improve efficiency, and potentially extend the life of our Missouri operations. Minerals are finite, and there is no better message for sustainability than making the most of them.”

A central focus of the report is Doe Run’s proprietary ACL HydroMet Process, a hydrometallurgical technology developed over more than 15 years. The process is designed to recover multiple minerals from mined material and recycled materials using a wet-chemical process that operates cleaner than a traditional furnace-based smelter, with lower air emissions and a smaller carbon footprint. The process can also recover valuable resources from what is currently considered waste, strengthening U.S. supply while supporting environmental cleanup.

Doe Run’s pilot work has demonstrated the ability to recover critical minerals including cobalt, copper, germanium, nickel, zinc, lead, antimony, and tin. The technology is designed to process lower-grade bulk concentrates, which will reduce the need for sorting and separating underground, meaning less time and less cost to bring material to the surface. By lowering costs and recovering more value from the same ore bodies, Doe Run can extend the life of its mines and sustain the jobs of the people who work them.

The report also outlines other 2025 sustainability initiatives, including:

  • Advancing the ACL HydroMet Process to recover a broader range of critical minerals, improve processing efficiency, and support the long-term viability of Doe Run’s Missouri mines.
  • Progressing with plans to modernize our lead recycling operations at the Buick Resource Recycling Facility by incorporating the ACL HydroMet Process and other technologies to improve operating conditions, reduce emissions, and recover additional minerals, including tin and antimony.
  • Strengthening domestic supply chains by keeping 100% of Doe Run’s copper production in North America for processing and continuing domestic zinc production, with the vast majority of zinc remaining in North America, reducing foreign dependency and cutting emissions associated with long-distance freight.
  • Continuing support of domestic battery supply chains through Doe Run’s lead recycling operations, which recycle lead batteries and other lead-bearing materials.
  • Investing in employees and communities, including more than $100 million in annual payroll, more than $165 million in annual spending with nearly 500 Missouri vendors, and programs supporting employee education, training, and community involvement.
  • Strengthening environmental stewardship through enhanced monitoring, controls, and management systems designed to protect human health and natural resources while reducing operational risk.
  • Maintaining a long-term commitment to historic and active-site cleanup, modernization, and responsible environmental management in the communities where Doe Run has operated for more than 160 years.

“Critical mineral supply is a national issue, but the solution can start in places like southeast Missouri,” added Wohl. “Our goal is to use technology to recover more of what is already in our mines and recycling streams, keep more of that value in the United States, and create a stronger, more resilient domestic supply of the minerals on which our economy depends.”

Doe Run treats sustainability as operational resilience, protecting the continuity of safe, responsible operations while supporting long-term value for its communities and stakeholders.  The company’s sustainability program is overseen at senior levels through executive oversight and management accountability, with progress tracked through measurable targets and regular review. The company also works with state and federal agencies throughout the development of its technology and operations to strengthen environmental planning, monitoring, and risk management.

Since 2009, Doe Run has produced an annual Sustainability Report following Global Reporting Initiative (GRI) guidelines. The GRI is the world’s most widely used sustainability reporting framework and encourages companies to share information relevant to employees, communities, and other stakeholders.

Doe Run invites readers to review the full 2025 Sustainability Report and share their feedback through its online survey.

About The Doe Run Company

Based in St. Louis, Missouri, USA, The Doe Run Company is a privately held critical minerals and natural resources company providing vital minerals and metals to the global market. Dedicated to environmentally responsible mineral and metal production, Doe Run operates mines located in southeast Missouri from where it produces lead, zinc and copper concentrates. Doe Run also operates one of the world’s largest, single-site lead recycling centers, located in Boss, Missouri. Company mineral and metal resources contain lead, zinc, copper, cobalt, nickel, tin and antimony – all vital metals to support a more sustainable energy future. Doe Run has additional operations in Washington and Arizona. For more information, visit www.doerun.com.