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Lithium Americas to Join the S&P/TSX Composite Index

Listings & Exchange

Lithium Americas to Join the S&P/TSX Composite Index

(All amounts in US$ unless otherwise indicated)

VANCOUVER, British Columbia--(BUSINESS WIRE)--December 8, 2025--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.

Jonathan Evans, President and CEO said, “Our inclusion on the S&P/TSX Composite Index

demonstrates the significant progress Lithium Americas has made as we advance Thacker Pass

toward production to onshore industrial-scale lithium production by late-2027. This milestone

highlights our commitment to creating long-term value for our stakeholders and underscores our

position in the North American critical mineral supply chain.”

ABOUT LITHIUM AMERICAS

Lithium Americas is building Thacker Pass located in Humboldt County in northern Nevada

(“Thacker Pass”). Phase 1 of Thacker Pass is designed for nominal production capacity of

40,000 tonnes per year of battery-quality lithium carbonate, and mechanical completion is

targeted for late-2027. Thacker Pass hosts the largest known measured lithium resource

(Measured and Indicated) and reserve (Proven and Probable) in the world and is owned by a joint

venture between Lithium Americas (holding a 62% interest), and General Motors Holdings LLC

(“GM”) (holding a 38% interest). Project financing for Phase 1 of Thacker Pass includes a $2.23

billion loan from the U.S. Department of Energy (the “DOE Loan”) and strategic investments

from GM and Orion Resource Partners LP. Construction of Phase 1 of Thacker Pass is expected

to create nearly 2,000 direct jobs, including 1,800 skilled contractors. Lithium Americas’ shares

are listed on the Toronto Stock Exchange and New York Stock Exchange under the symbol

LAC. To learn more, visit www.lithiumamericas.com or follow @LithiumAmericas on social

media.

FORWARD-LOOKING STATEMENTS

This news release contains “forward-looking information” within the meaning of applicable

Canadian securities legislation, and “forward-looking statements” within the meaning of the

Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities

Exchange Act of 1934, as amended (collectively referred to as “FLS”) and is subject to important

risks and uncertainties (such statements are usually accompanied by words such as “anticipate,”

“plan,” “continues,” “estimate,” “expect,” “may,” “will,” “projects,” “predict,” “proposes,”

“potential,” “target,” “implement,” “scheduled,” “forecast,” “intend,” “would,” “could,”

“might,” “should,” “believe” and similar terminology, or statements that certain actions, events

or results “may,” “could,” “would,” “might” or “will” be taken, occur or be achieved). FLS in

this news release include, but are not limited to: statements relating to project financing for Phase

1 of Thacker Pass, including the DOE Loan and strategic investments; estimates of, and changes

to, mineral resources and mineral reserves at Thacker Pass, their development and realization;

the Company’s ability to produce high-purity, battery-grade lithium products; the timing,

quantity, capacity and product quality of future production at Thacker Pass; successful

development of Thacker Pass; and anticipated job creation.

FLS statements in this news release are intended to provide Lithium Americas security holders

and potential investors with information regarding the Company, including management's

assessment of Lithium Americas and its subsidiaries' future plans and financial outlook. All

forward-looking statements reflect the Company’s beliefs and assumptions based on information

available at the time the statements were made and as such are not guarantees of future

performance. Such statements are subject to a number of assumptions, risks and uncertainties,

many of which are beyond the Company’s control. Additional information about these

assumptions and risks and uncertainties is contained in the Company’s filings with securities

regulators, including the Company’s most recent Annual Report on Form 10-K and in any

subsequently filed Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, and other

disclosures in each case made available on SEDAR+ at www.sedarplus.ca and on EDGAR at

www.sec.gov. As actual results could vary significantly from the forward-looking information,

you should not put undue reliance on forward-looking information and should not use future-

oriented information or financial outlooks for anything other than their intended purpose.

The FLS contained in this news release is expressly qualified by these cautionary statements. All

FLS in this news release speaks as of the date hereof. The Company does not undertake any

obligation to update or revise any FLS, whether as a result of new information, future events or

otherwise, except as required by law.

Contacts

INVESTOR CONTACT

Virginia Morgan, VP, IR and ESG

+1-778-726-4070

[email protected]