Exhibit 99.1

LITHIUM ARGENTINA AG (FORMERLY LITHIUM AMERICAS (ARGENTINA) CORP.)

CONSOLIDATED STATEMENTS OF FINANCIAL POSITION

(Unaudited)

(Expressed in thousands of US dollars)

Approved for issuance on August 8, 2025

On behalf of the Board of Directors:

LITHIUM ARGENTINA AG (FORMERLY LITHIUM AMERICAS (ARGENTINA) CORP.)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(Unaudited)

(Expressed in thousands of US dollars, except for per share amounts; shares in thousands)

LITHIUM ARGENTINA AG (FORMERLY LITHIUM AMERICAS (ARGENTINA) CORP.)

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

(Unaudited)

(Expressed in thousands of US dollars, shares in thousands)

LITHIUM ARGENTINA AG (FORMERLY LITHIUM AMERICAS (ARGENTINA) CORP.)

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(Expressed in thousands of US dollars)

1. NATURE OF OPERATIONS

Lithium Argentina AG (“Lithium Argentina”, the “Company” or “LAR”), formerly Lithium Americas (Argentina) Corp., is a Swiss- domiciled resource company with lithium projects located in Argentina.

On January 23, 2025, the Company completed a plan of arrangement under the laws of the province of British Columbia (the “Arrangement”) involving the Company’s continuation from the province of British Columbia under the name “Lithium Americas (Argentina) Corp.” into Zug, Canton of Zug, Switzerland, as a Swiss share corporation under the name “Lithium Argentina AG.” As a result, the Company ceased to be governed by the Business Corporations Act (British Columbia). Following the Arrangement, the shareholders of the Company prior to the Arrangement continued to hold all the issued and outstanding common registered shares of the Company (the “Continuation”) (Note 13). On January 27, 2025, the Company began trading under the new symbol “LAR” on the Toronto Stock Exchange (“TSX”) and the New York Stock Exchange (“NYSE”).

The Company is focused on the operations of the Cauchari-Olaroz project (“Cauchari-Olaroz”). Cauchari-Olaroz is a lithium brine operation located in the Salar de Olaroz and Salar de Cauchari in Jujuy province, north-western Argentina. The Company’s interest in Cauchari-Olaroz is held through a 44.8% ownership interest in Minera Exar S.A. (“Minera Exar”), a company incorporated under the laws of Argentina. Ganfeng Lithium Co. Ltd. (“Ganfeng”) owns 46.7% of Minera Exar with the remaining 8.5% interest held by Jujuy Energia y Mineria Sociedad del Estado (“JEMSE”), a mining investment company owned by the provincial government of Jujuy. Cauchari-Olaroz is in the production stage and achieved commercial production effective October 1, 2024, and is accounted for using the equity method.

The Company also owns 85.1% interest in the Pastos Grandes lithium project (“Pastos Grandes”) acquired through the acquisition of Millennial Lithium Corp. (“Millennial”) on January 25, 2022, and a 65% ownership interest in the Sal de la Puna project (“Sal de la Puna”), held by the Company’s wholly-owned subsidiary Arena Minerals Inc. (“Arena Minerals”) which was acquired on April 20, 2023. Pastos Grandes and Sal de la Puna are lithium brine projects located in Salta province, in north-western Argentina. Pastos Grandes is fully consolidated in the Company’s financial statements, whereas Sal de la Puna is accounted for using the equity method.

The Company's registered office is located at Dammstrasse 19, 6300 Zug, Switzerland.

2. BASIS OF PREPARATION AND PRESENTATION

These condensed consolidated interim financial statements of the Company (“Interim Financials”) have been prepared in accordance with IFRS Accounting Standards applicable to the preparation of interim financial statements, under International Accounting Standard 34, Interim Financial Reporting and were approved by the Board of Directors on August 8, 2025. The Interim Financials should be read in conjunction with the Company’s annual consolidated financial statements for the year ended December 31, 2024 (the “2024 Annual Financials”), which have been prepared in accordance with IFRS Accounting Standards.

The Interim Financials are expressed in United States dollars (“US$”), the Company’s presentation currency. The same accounting policies and methods of computation have been used in the Interim Financials and 2024 Annual Financials other than those disclosed in Note 3.

3. SUMMARY OF MATERIAL ACCOUNTING POLICIES

Estimation Uncertainty and Accounting policy judgments

The preparation of these Interim Financials in conformity with IFRS Accounting Standards applicable to the preparation of interim financial statements requires judgments, estimates, and assumptions that affect the amounts reported. Those estimates and assumptions concerning the future may differ from actual results. Estimates and judgments are continually evaluated and are based on historical experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances.

The nature and number of significant estimates and judgments made by management in applying the Company’s accounting policies and the key sources of estimation uncertainty are the same as those that management applied to the 2024 Annual Financials except as disclosed below.

New IFRS Pronouncements

IFRS 18 Presentation and Disclosure in Financial Statements

In April 2024, the International Accounting Standards Board (“IASB”) issued IFRS 18, Presentation and Disclosure in Financial Statements which will replace IAS 1, Presentation of Financial Statements. IFRS 18 introduces new requirements on presentation within the statement of profit or loss, including specified totals and subtotals.

It also requires disclosure of management-defined performance measures and includes new requirements for aggregation and disaggregation of financial information based on the identified ‘roles’ of the primary financial statements and the notes.

In addition, there are consequential amendments to other accounting standards; some requirements previously included in IAS 1 have been moved to IAS 8 and limited amendments have been made to IAS 7 and IAS 34. IFRS 18 is effective for the reporting period beginning on or after January 1, 2027, with early application permitted. Retrospective application is required in both annual and interim financial statements. The Company is currently assessing the impact of this standard on its financial statements and has not yet applied it.

Amendments to IFRS 9 and IFRS 7 – Amendments to the Classification and Measurement of Financials Instruments

In May 2024, the IASB issued amendments to IFRS 9 and IFRS 7, Amendments to the Classification and Measurement of Financial Instruments. These amendments updated classification and measurement requirements in IFRS 9 Financial Instruments and related disclosure requirements in IFRS 7 Financial Instruments: Disclosures. The IASB clarified the recognition and derecognition date of certain financial assets and liabilities, and amended the requirements related to settling financial liabilities using an electronic payment system. It also clarified how to assess the contractual cash flow characteristics of financial assets in determining whether they meet the solely payments of principal and interest criterion, including financial assets that have environmental, social and corporate governance (ESG)-linked features and other similar contingent features. These amendments require additional disclosures for financial instruments with contingent features that do not relate directly to basic lending risks and costs and amended disclosures relating to equity instruments designated at fair value through other comprehensive income.

3. SUMMARY OF MATERIAL ACCOUNTING POLICIES (continued)

The amendments are effective for annual periods beginning on or after January 1, 2026. Early adoption is permitted, with an option to early adopt the amendments for contingent features only. The Company is currently assessing the impact of these amendments on its financial statements and has not yet applied it.

4. CASH AND CASH EQUIVALENTS

Cash and cash equivalents

As at June 30, 2025, cash and cash equivalents included $89 held in Canadian dollars (December 31, 2024 – $156), $67,844 in US dollars (December 31, 2024 – $85,289), $53 in Argentine Pesos (December 31, 2024 – $98) and $42 in Swiss Francs (December 31, 2024 – $Nil). During the six months ended June 30, 202, cash and cash equivalents generated an interest income of $1,495 (2024 – $2,183).

5. SAL DE LA PUNA JOINT VENTURE

On April 20, 2023, the Company completed the acquisition of Arena Minerals that owns 65% of Sal de la Puna through a joint venture interest in Sal de la Puna Holdings Ltd., the 100% owner of Argentine entity, Puna Argentina S.A.U. (“PASA”), the owner of the claims forming part of the Sal del la Puna Project.

The remaining 35% of PASA is owned by joint venture partner Ganfeng New Energy Technology Development (Suzhou) Co., Ltd. Therefore, after the acquisition of Arena Minerals, the Company holds a 65% ownership interest in the Sal de la Puna Project covering approximately 13,200 hectares of the Pastos Grandes Basin.

The Company’s 65% ownership interest in Sal de la Puna is a joint venture and is accounted for using the equity method of accounting. Changes in the investment balance are summarized below:

6. INVESTMENT IN CAUCHARI-OLAROZ PROJECT

As at June 30, 2025, the Company, Ganfeng, and JEMSE hold 44.8%, 46.7%, and 8.5% equity interests, respectively, in Minera Exar, the company that holds all rights, title, and interest in the Cauchari-Olaroz project, located in the Jujuy province of Argentina.

6. INVESTMENT IN CAUCHARI-OLAROZ PROJECT (continued)

JEMSE acquired its 8.5% equity interest in Minera Exar in April 2021, which was divided as 4.2% from the Company and 4.3% from Ganfeng. The right to acquire this 8.5% interest was initially granted under a letter of intent signed in 2012, in compliance with the Province of Jujuy's regulations concerning government participation in mineral projects. As part of the closing of the JEMSE transaction, JEMSE has agreed to reimburse the Company and Ganfeng their pro-rata share of $23,496 (8.5%) for the equity financing provided for the construction of the Cauchari-Olaroz project in prior years. This reimbursement will be made through the assignment of one-third of the dividends otherwise payable to JEMSE in future periods. Annual dividend distributions by Minera Exar to all shareholders, including JEMSE, will only be considered once Minera Exar has met all project debt commitments for the Cauchari-Olaroz project. As of June 30, 2025, the carrying value of the long-term receivable from JEMSE was $8,291 (2024 – $7,935).

The Company’s operations related to Cauchari-Olaroz are conducted through its equity investees, Minera Exar and Exar Capital, which are governed by a shareholders’ agreement between the Company and Ganfeng. The shareholders’ agreement regulates key aspects of the governance of the project and provides the Company with significant influence over Minera Exar. Under this agreement, the Company and Ganfeng are entitled to the project’s production offtake on a 49%/51% basis. Construction costs were also shared on the same 49%/51% pro rata basis between the Company and Ganfeng.

The Company and Ganfeng are 49% and 51% shareholders, respectively, in Exar Capital, a company that provides shareholder financing to Minera Exar. Minera Exar and Exar Capital are accounted for using the equity method of accounting (the investment in Minera Exar and investment in Exar Capital together, the “Investment in Cauchari-Olaroz project”).

In Q2 2024, Lithium Argentina and Ganfeng, as the shareholders and lender of Exar Capital, provided an irrevocable commitment to Minera Exar that they would not seek repayment of the amounts advanced or loaned to the Company for a period of twelve months from July 1, 2025.

Investment in Cauchari-Olaroz Project

Changes in the Investment in Cauchari-Olaroz Project are summarized below:

As of October 1, 2024, Minera Exar determined that commercial production had been achieved for the Cauchari-Olaroz project after reaching elevated production levels for a sustained period. As a result, the Cauchari-Olaroz project’s assets were considered ready for their intended use, and depreciation of these assets commenced on October 1, 2024.

6. INVESTMENT IN CAUCHARI-OLAROZ PROJECT (continued)

The following is the condensed financial information of Minera Exar on a 100% basis, as amended to reflect the Company’s accounting policies.

As of June 30, 2025, Minera Exar’s outstanding third-party debt amounted to $257,537 (2024 – $210,400), while its cash balance was $24,995 (2024 – $11,190). The total debt includes the following:

As of June 30, 2025, Minera Exar also had an undrawn balance of $85,000 available under one of its bank debt facilities, of which $23,000 was drawn subsequent to period end. This facility is secured by guarantees and standby letters of credit arranged by Ganfeng. The Company has also provided a guarantee to Ganfeng for its 49% share of the facility, amounting to $11,270.

6. INVESTMENT IN CAUCHARI-OLAROZ PROJECT (continued)

Minera Exar has to settle the loans provided by Exar Capital and PGCo in US$ with sufficient Argentine Pesos (“ARS$”) at the implied market exchange rate. This settlement mechanism requires Minera Exar to repay the loans with more US$ at the official exchange rate. Since the repayment mechanism for the USD loans provided by Exar Capital and PGCo to Minera Exar is linked to the implied market foreign exchange rate in Argentina rather than the official foreign exchange rate, it results in an embedded derivative in the loans payable by Minera Exar. The fair value of this embedded derivative fluctuates with changes in the spread between the implied market exchange rate and the official exchange rate. During the second quarter of 2025, changes in Argentine foreign exchange regulations caused the implied exchange rate to converge with the official rate, resulting in a gain of $96,512, which was recognized in the other income line item in Minera Exar’s condensed statement of comprehensive income/(loss). This gain partially offset derivative losses recognized in the first quarter of 2025. Other income for the second quarter of 2025 also includes a deferred tax expense of $35,448.

As of January 1, 2025, the Company’s investment in Minera Exar was $Nil, and its investment in Exar Capital was $32,919. For the six months ended June 30, 2025, the Company’s share of the losses of Minera Exar and Exar Capital were $1,036 and $923, respectively. Since the Company’s investment in Minera Exar was $Nil as of January 1, 2025, it did not recognize its share of Minera Exar’s losses for the period. The accumulated unrecognized share of Minera Exar’s losses as of June 30, 2025, was $27,079 (2024 – $26,043).

As of June 30, 2025, the carrying value of the Company’s investment in Minera Exar remained $Nil, and its investment in Exar Capital was $31,996.

7. LOANS TO EXAR CAPITAL

The Company has entered into loan agreements with Exar Capital. Changes in the balances of loans to Exar Capital are summarized below.

7. LOANS TO EXAR CAPITAL (continued)

The loans provided by the Company to Exar Capital are thereafter advanced to Minera Exar to finance the construction of Cauchari-Olaroz, and to support its working capital and other funding requirements. Each loan has a maturity of seven years from the date of drawdown. Loans advanced prior to January 1, 2022, carried an interest rate of London Interbank Offered Rate (“LIBOR”) plus 9.495%, while loans advanced on or after January 1, 2022, carry an interest rate of the Secured Overnight Financing Rate (“SOFR”) plus 10.305%.

During the six months ended June 30, 2025, the Company did not advance any new loans to Exar Capital. Exar Capital utilized its existing cash balance to repay a portion of its outstanding loan, amounting to $3,920.

As of June 30, 2025, the total outstanding loans to Exar Capital, including accrued interest, amounted to $399,734. The recoverability of these loans is dependent on the future cash flows and performance of Cauchari-Olaroz. The Company performed an expected credit loss assessment based on the anticipated future performance of Cauchari-Olaroz and its associated cash flows. The assessment did not indicate any significant credit risk or factors that would result in default.

As at June 30, 2025, a total of 49 loans had been advanced to Exar Capital by the Company, with maturities (inclusive of accrued interest to June 30, 2025) as follows: $37,907 due in the second half of 2026, $32,079 due in 2027, $77,191 due in 2028, $112,207 due in 2029, $89,165 due in 2030, and $51,185 due in 2031.

8. PURCHASES AND SALES OF LITHIUM CARBONATE

Offtake Agreement with Ganfeng and Bangchak

The Company and Ganfeng are entitled to a share of offtake from production at Cauchari-Olaroz. The Company is entitled to 49% of the offtake, which would amount to approximately 19,600 tonnes per annum (“tpa”) of lithium carbonate assuming full capacity is achieved. The Company has entered into an offtake agreement with each of Ganfeng and BCP Innovation PTE. LTD (“Bangchak”), a wholly-owned subsidiary of Bangchak Corporation Public Company Ltd., to sell a fixed amount of offtake production at market-based prices, with Ganfeng entitled to 80% of the first 12,250 tpa of lithium carbonate (9,800 tpa assuming full production capacity) and Bangchak entitled to up to 6,000 tpa of lithium carbonate (assuming full production capacity).

The balance of the Company’s offtake entitlement, amounting to up to approximately 3,800 tpa of lithium carbonate, is uncommitted, but for limited residual rights available to Bangchak to the extent production does not meet full capacity.

Purchases and sales of lithium carbonate

During the six months ended June 30, 2025, the Company purchased its 49% share of Minera Exar’s lithium carbonate shipped during the period. The Company sold the purchased lithium carbonate to Ganfeng and Bangchak and acted in the capacity of agent in such sales transactions, as the Company’s acquisition of title to lithium carbonate was simultaneous with the sale of lithium carbonate to Ganfeng and Bangchak and the Company was not directly exposed to inventory or price risk related to lithium carbonate.

8. PURCHASES AND SALES OF LITHIUM CARBONATE (continued)

During the six months ended June 30, 2025, the Company made approximately $59,265 worth of purchases of lithium carbonate from Minera Exar and sold an equivalent amount, totaling approximately $59,265, to Ganfeng and Bangchak. Since there was no net commission earned by the Company, there was no impact on the Company’s statement of comprehensive loss for six months ended June 30, 2025.

As at June 30, 2025, the Company had a payable of $24,036 to Minera Exar for lithium carbonate purchases, and receivables totaling $24,036 from Ganfeng for sales of lithium carbonate, as disclosed on the statement of financial position. The Company performed an expected credit loss assessment for these receivables, which did not indicate any significant credit risk or factors that would result in default, as the majority of the receivables were settled after June 30, 2025.

9. PASTOS GRANDES

On August 16, 2024, Proyecto Pastos Grandes S.A. (“PGCo”), a wholly-owned subsidiary of the Company holding the Pastos Grandes project in Salta, Argentina, issued common shares representing approximately 14.9% of PGCo to Ganfeng for a consideration of approximately $70,000 (the “Pastos Grandes transaction”). As the Company retained control of PGCo, the transaction was accounted for as an equity transaction, resulting in the recognition of a non-controlling interest representing Ganfeng Lithium’s 14.9% share in the net assets of PGCo.

In Q3 2024, PGCo utilized the proceeds from the Pastos Grandes transaction to enter into $65,000 loan facility agreement with Minera Exar to fund its debt repayment, working capital and other requirements. The loan matures in five years and carries an interest rate of SOFR plus 4.0%.

10. PROPERTY, PLANT AND EQUIPMENT