The FTSE 100 company said the files related to its operations in Venezuela, Nigeria and the Democratic Republic of the Congo stretching back as far as 2007 and concern its compliance with the Foreign Corrupt Practices Act and USA money laundering laws.
"The requested documents relate to the Glencore Group's business in Nigeria, the Democratic Republic of Congo and Venezuela from 2007 to present", the company stated, adding that it is in the process of reviewing the request. They have since continued to fall, and by around 10.20 a.m. BST (5.20 a.m. ET) are more than 12% lower.
Shares in the Anglo-Swiss firm fell more than 11% in London, wiping more than £5bn off its market value, after it revealed it had been ordered to hand over documents to the US Department of Justice.
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The company has copper and cobalt operations in Congo, and trades with Nigeria and Venezuela.
The company's business in the Democratic Republic of Congo has come under scrutiny recently. The U.S. alleges Gertler amassed a personal fortune of billions of dollars by using his personal relationship with Congolese President Joseph Kabila to siphon off cash from the sale of mineral and oil rights.
Gertler was sanctioned by the United States a year ago for "opaque and corrupt mining and oil deals" in DRC, Africa's biggest copper producer.