U.S. Silicon Metal Producers Welcome Favorable Preliminary Trade Rulings on Imports from Angola, Australia, Laos, Norway, and Thailand

WASHINGTON, Oct. 1, 2025 /PRNewswire/ -- Ferroglobe USA, Inc. ("Ferroglobe") and Mississippi Silicon LLC ("Mississippi Silicon"), representing all American silicon metal production, welcomed the recent favorable preliminary determinations by the U.S. Department of Commerce ("Commerce") in the investigations of unfairly priced and subsidized silicon metal imports from Angola, Australia, Laos, Norway, and Thailand.

Silicon metal is a critical material used in everything from aluminum and silicones to solar panels and semiconductors. U.S. producers say the decisions are an important step toward ensuring a level playing field and protecting a domestic industry vital to national security and clean energy. The cases cover all forms and sizes of silicon metal, which contains at least 85.00 percent but less than 99.99 percent silicon, and less than 4.00 percent iron, by actual weight.

On September 23, 2025, Commerce announced preliminary countervailing duties on subsidized imports of silicon metal from Australia (41.31%), Laos (240.00%), Norway (16.87%), and Thailand (31.27%). These duties took effect as of September 26, 2025.

On September 26, 2025, Commerce announced preliminary antidumping duties on unfairly priced imports of silicon metal from Angola (68.45%) and Laos (94.44%). These duties took effect as of September 30, 2025.

Additional rulings are expected later this year:

• November 21, 2025 – preliminary antidumping decisions expected for Australia and Norway
• December 11, 2025 – final determinations expected for Angola, Laos, and Thailand

"We thank the hard-working professionals at the U.S. Commerce Department for their diligent work on these complex cases," said Marco Levi, Chief Executive Officer of Ferroglobe PLC. "We look forward to the final determinations in December."

"These decisions are an important step toward returning fair competition in the U.S. market," said Eddie Boardwine, Chief Executive Officer of Mississippi Silicon. "For our employees, customers, and communities, this action helps ensure a strong future for American manufacturing."

About Ferroglobe and Mississippi Silicon

Ferroglobe is a wholly-owned U.S. subsidiary of Ferroglobe PLC, a world leading producer of ferrosilicon, silicon metal, and manganese-based alloys, serving a customer base across the globe in dynamic and fast-growing end markets, such as solar, automotive, consumer products, construction and energy. Through its subsidiaries, Ferroglobe owns metallurgical manufacturing facilities and other operations in Ohio, West Virginia, South Carolina, Alabama, Indiana, Florida and Kentucky.

Mississippi Silicon LLC is a partnership between Rima Holding USA, Inc. and Clean Tech I LLC. Rima Holding USA Inc. is the majority owner of MS and also is associated with Rima Industrial S/A, a leading ferroalloy and non-ferrous metals producer in Brazil. Clean Tech I LLC is a partnership composed of strategic investors and financial advisers. MS's manufacturing operation is based in Burnsville, MS, and its silicon metal serves customers throughout the United States in a broad range of industries including aluminum, automotive, and chemical industries, solar cells, and semiconductors.

For more information, visit https://www.ferroglobe.com/ and https://www.missilicon.com/.

Contact: Elizabeth Posthumus: [email protected], 202-445-9858

SOURCE Ferroglobe USA / Mississippi Silicon