US President Donald Trump, left, and Doug Burgum, US secretary of the interior, in the Oval Office of the White House in Washington, DC, US, on Monday, Oct. 6, 2025.
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Shares of U.S.-listed minerals explorer Trilogy Metals jumped as much as 205% in premarket trade on Tuesday, shortly after the White House said it would take a 10% stake in the Canadian company.
The stock traded 185% higher in premarket deals at 9:33 a.m. London time (4:33 a.m. ET).
The White House on Monday announced a partnership with Trilogy Metals as part of a push to unlock domestic supplies of copper and other critical minerals in the Ambler mining district in Alaska.
The partnership included a $35.6 million investment, which makes the U.S. government a 10% shareholder in Trilogy Metals.
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