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Interim Financial Statements | 9 Months Ended
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Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Interim Financial Statements | Interim Financial Statements Basis of Presentation. The Consolidated Financial Statements and related disclosures as of September 30, 2025, and for the three and nine months ended September 30, 2025 and 2024, contained in this Form 10-Q (the “Consolidated Financial Statements”) are unaudited pursuant to the rules and regulations of the SEC. The December 31, 2024 Consolidated Balance Sheet data contained in this Form 10-Q was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to SEC rules and regulations. In our opinion, the Consolidated Financial Statements include all adjustments (consisting only of normal recurring adjustments) necessary for the fair statement of the results for the interim periods and should be read in conjunction with the financial statements included in the 2024 Form 10-K. The results of operations for the three and nine months ended September 30, 2025 are not necessarily indicative of the results to be expected for the full year ending December 31, 2025. Unless the context otherwise requires, all references to “Amkor,” “we,” “us” or “our” are to Amkor Technology, Inc. and its wholly and majority-owned subsidiaries. Use of Estimates. The Consolidated Financial Statements have been prepared in conformity with U.S. GAAP, using management’s best estimates and judgments where appropriate. These estimates and judgments affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The estimates and judgments will also affect the reported amounts for certain revenues and expenses during the reporting period. Actual results could differ materially from these estimates and judgments as a result of, for example, any worsening of the global business and economic environment. Restricted Cash. Restricted cash, non-current, mainly consists of collateral to fulfill construction requirements. Leases. Total long-term finance lease liabilities as of September 30, 2025 and December 31, 2024 were $89.3 million and $122.7 million, respectively. Goodwill. The balance of goodwill in the Consolidated Balance Sheets contained in this Form 10-Q reflects adjustments for foreign currency translation. Unbilled Receivables. Total unbilled receivables as of September 30, 2025 and December 31, 2024 were $332.4 million and $210.1 million, respectively. Contract Liabilities. Contract liabilities were $83.1 million and $95.6 million as of September 30, 2025 and December 31, 2024, respectively. As of September 30, 2025 and December 31, 2024, the short-term portions of the liabilities were $56.2 million and $59.7 million, respectively. Of the remaining September 30, 2025 contract liability balance, $24.0 million is expected to be recognized in revenue over the next 1-5 years, and $2.9 million thereafter. Revenue recognized during the nine months ended September 30, 2025 and 2024 that was included in the contract liabilities balance at the beginning of the period was $48.7 million and $54.4 million, respectively. Grant Accounting. From time to time, we may receive grants from governmental agencies. We recognize grants in our financial statements when there is reasonable assurance that we will comply with conditions attached to the grants and the grants will be received. On July 4, 2025, the One Big Beautiful Bill Act (the “OBBBA”) was enacted in the United States, which includes a provision to increase the investment tax credit rate under the CHIPS Act from 25% to 35% for qualified property placed in service after 2025. Investment tax credits and grants receivable recorded reduce the carrying amounts of the qualifying property, plant and equipment in our Consolidated Balance Sheets. The following table presents investment tax credits and grants receivable as of September 30, 2025 and December 31, 2024:
| September 30, 2025 |  | December 31, 2024
| (In thousands)
Investment tax credits recorded in: |  |  |
Other current assets | $ | 3,938 |  |  | $ | — |
Other assets | 23,456 |  |  | 1,403 |
Grants receivable recorded in: |  |  |
Other assets | 7,270 |  |  | — |
In September 2025, we entered into an agreement to exchange approximately 56 acres of land acquired in 2024 for approximately 104 acres of land related to the Arizona Facility. The transaction is structured as a nonmonetary asset exchange with no cash consideration. The 104 acre parcel will be recorded at the carrying value of the land relinquished with no gain or loss recognized. The transaction is expected to close in the fourth quarter of 2025. Recently Issued Standards. In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”). ASU 2023-09 requires disclosure of additional income tax information, primarily related to effective tax rate reconciliation and income taxes paid. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. Adoption of this ASU should be applied on a prospective basis, but retrospective application is permitted. We plan to adopt the new standard in the fourth quarter of 2025 using the prospective method, which will result in enhanced disclosures in our financial statements. In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (“ASU 2024-03”), which was subsequently amended and clarified. ASU 2024-03 requires disaggregation of key expense categories such as inventory purchases, employee compensation, depreciation and intangible asset amortization in the financial statements. ASU 2024-03 is effective for annual reporting periods beginning after December 15, 2026, and interim periods within annual reporting periods beginning after December 15, 2027. Early adoption is permitted. Adoption of this ASU should be applied either prospectively after the effective date or retrospectively to any or all periods presented in the financial statements. We are currently evaluating the impact of this new standard on our financial statements, and we expect the new standard to result in enhanced disclosures. In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40) (“ASU 2025-06”). ASU 2025-06 removes all references to project stages throughout ASC 350-40 and clarifies the applicable threshold to begin capitalizing costs. ASU 2025-06 is effective for annual reporting periods beginning after December 15, 2027, and interim periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual reporting period. Adoption of this ASU should be applied using a prospective transition approach, a modified transition approach based on project status or a retrospective transition approach. We are currently evaluating the impact of this new standard on our financial statements and disclosures.

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