Lithium Americas To Be Added To S&P/TSX Composite Index, Effective December 22

Lithium Americas Corp. (TSX:LAC) (NYSE:LAC) ("Lithium Americas" or the "Company") announced that, as disclosed by S&P Dow Jones Indices on December 5, 2025, the Company's common shares will be added to the S&P/TSX Composite Index, effective prior to the open of trading on Monday, December 22, 2025. The S&P/TSX Composite Index is Canada's premier equity benchmark and includes the largest and most actively traded companies on the Toronto Stock Exchange.