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Preliminary Affirmative Determinations in the Antidumping Duty Investigations of Silicon Metal from Angola and the Lao People’s Democratic Republic

Preliminary Affirmative Determinations in the Antidumping Duty Investigations of Silicon Metal from Angola and the Lao People’s Democratic Republic

On September 26, 2025, the U.S. Department of Commerce (Commerce) announced its preliminary affirmative determinations in the antidumping duty (AD) investigations of silicon metal from Angola and the Lao People’s Democratic Republic (Laos)

Preliminary Dumping Rates

Angola

Exporter/ProducerWeighted-Average Dumping Margin (Percent) 
PC Silicon Co Limited68.45*
Wanhongda International Limited68.45*
All-Others68.45

*This rate is based on facts available with adverse inferences.

Laos

Exporter/ProducerWeight-Average Dumping Margin (Percent) 
Lao Silicon Co., Ltd.94.44*
All-Others94.44

*This rate is based on facts available with adverse inferences.


Import Statistics 

Angola202220232024
Volume (KG)001,675,173
Value (USD)00$4,151,880
Laos202220232024
Volume (KG)600,0003,400,0007,957,738
Value (USD)$1,809,000$8,829,250$18,418,739

Source: U.S. Census Bureau, accessed through S&P Global Trade Atlas (Harmonized Tariff Schedule of the United States (HTSUS) subheadings 2804.69.1000 and 2804.69.5000).

Next Steps

  • The final determinations of these AD investigations are currently scheduled to be announced on December 8, 2025, unless postponed.
  • The companion preliminary AD investigations for Australia and Norway are currently scheduled to be announced on November 20, 2025.
  • The U.S. International Trade Commission (ITC) is running concurrent injury determination investigations. For more information related to the ITC’s timeline, please refer to the ITC’s calendar.  

Other Case Information

  • The petitioners are Ferroglobe USA, Inc. (Beverly, OH) and Mississippi Silicon LLC (Burnsville, MS).
  • For general information and next steps, please refer to a list of preliminary FAQs. 

  • Additional case information, including the scope of the investigations, is on file electronically via Enforcement and Compliance’s Antidumping and Countervailing Duty Centralized Electronic Service System (ACCESS). Once you log in, please refer to the following case numbers:

    Trading PartnerAD Case Number
    AngolaA-762-001
    LaosA-553-001
  • For more information on subsidy programs, please refer to the subsidies enforcement library.
  • To date, Commerce maintains 781 AD and CVD orders that provide relief to American companies and industries impacted by unfair trade.