Lithium Americas

Use of net proceeds for the March 2026 ATM Program includes general corporate purposes, which may include funding of corporate and project overhead expenses, financing of capital expenditures, repayment of indebtedness and additions to working capital.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

o A total of $1.3 billion of construction capital costs and other project-related costs have been capitalized, of which $1.1 billion is part of the total capital expenditure (“ Capex ”) estimate of $2.93 billion per the Company’s Technical Report entitled “NI 43-101 Technical Report on the Thacker Pass Project Humboldt County, Nevada, USA,” effective December 31, 2024 (“ Technical Report ”).

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

The Company continues to target a total capex range of $1.3 billion to $1.6 billion for Thacker Pass Phase 1 for fiscal year 2026.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

See the Capital Expenditure and 2026 Capex Guidance section below for more details.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

The Company will use current data to assess remaining labor needs and productivity rates for the estimate and will incorporate recent unexpected developments including 2 the implications of tariffs, the Middle East conflict impacts, fuel price increases and other inflationary increases that were not included in the total Capex estimate of $2.93 billion per the Company’s Technical Report.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

The total Capex estimate of $2.93 billion did not include any exposure to tariffs.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

In 2025, we emphasized de-risking project execution and made strategic decisions that have enabled us to focus on execution in 2026 – detailed engineering is almost complete, finances have been secured and global supply chain challenges are being well managed.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

Evans added, “At a moment when resilient domestic supply chains are more critical than ever, lithium stands out as a strategic resource underpinning both national security and a reliable energy future.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

DOE and strategic investments from GM and Orion.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

TECHNICAL INFORMATION The scientific and technical information in this news release has been reviewed and approved by Rene LeBlanc, PhD, SME, Vice President, Commercial and Product Strategy of the Company, and a “qualified person” as defined under National Instrument 43-101 and Subpart 1300 of Regulation S-K under the United States Securities Act of 1933, as amended.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

, misleading information or false claims overstating potential sustainability-related benefits); risks that the Company may face regarding potentially conflicting initiatives from certain U.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

The Company will use current data to assess remaining labor needs and productivity rates for the estimate and will incorporate recent unexpected developments including 2 the implications of tariffs, the Middle East conflict impacts, fuel price increases and other inflationary increases that were not included in the total Capex estimate of $2.93 billion per the Company’s Technical Report.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

The total Capex estimate of $2.93 billion did not include any exposure to tariffs.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

The Company estimates the total potential exposure to tariffs for Thacker Pass Phase 1 construction costs to be approximately $80 million to $120 million, the majority of which is expected to be incurred during 2026.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

(2) Thacker Pass Phase 1 construction costs as of March 31, 2026, and those estimated for 2026, include actual tariffs incurred (through March 31, 2026) and estimated tariff exposure, primarily for equipment and construction materials sourced from Canada, China, India, UAE, Turkey and the European Union.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

The Company has been working toward limiting the effect of any potential tariffs on its construction supply chain, with approximately 75% of the total capital project cost structure related to labor, contractors and other services not expected to be directly affected by any potential tariffs.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026

The Company continues to closely monitor potential tariff exposure; however, changes in tariffs and trade restrictions can be announced with little or no advance notice.

SEC original ↗Lithium Americas — Earnings release (8-K exhibit)EX-99May 14, 2026