帕卡 2025年度报告

REQUIRED INFORMATION A.Financial Statements and Supplemental Schedule Report of Independent Registered Public Accounting Firm B.Exhibits SIGNATURE The Plan. Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer theemployee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized. Date: June 24, 2026 Financial Statements and Supplemental Schedule PACCAR Inc Savings Investment PlanDecember 31, 2025 and 2024and for the Year Ended December 31, 2025 PACCAR IncSavings Investment PlanFinancial Statements and Supplemental ScheduleDecember 31, 2025 and 2024 andfor the Year Ended December 31, 2025 Contents Financial Statements Statements of Net Assets Available for BenefitsStatement of Changes in Net Assets Available for BenefitsNotes to Financial Statements Supplemental Schedule Schedule H, Line 4a – Schedule of Delinquent Participant Contributions10Schedule H, Line 4i – Schedule of Assets (Held at End of Year)11 Report of Independent Registered Public Accounting Firm To the Plan Participants and the Plan Administrator of PACCAR Inc Savings Investment Plan Opinion on the Financial Statements We have audited the accompanying statements of net assets available for benefits of PACCAR Inc Savings Investment Plan (thePlan) as of December 31, 2025 and 2024, and the related statement of changes in net assets available for benefits for the year endedDecember 31, 2025, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financialstatements present fairly, in all material respects, the net assets available for benefits of the Plan at December 31, 2025 and 2024, Basis for Opinion These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on the Plan’sfinancial statements based on our audits. We are a public accounting firm registered with the Public Company AccountingOversight Board (United States) (PCAOB) and are required to be independent with respect to the Plan in accordance with the U.S. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform theaudit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to erroror fraud. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting.As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due toerror or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidenceregarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles Supplemental Schedules Required by ERISA The accompanying supplemental schedules of assets (held at end of year) as of December 31, 2025, and delinquent participantcontributions for the year then ended (referred to as the “supplemental schedules”), have been subjected to audit proceduresperformed in conjunction with the audit of the Plan’s financial statements. The information in the supplemental schedules is theresponsibility of the Plan’s management. Our audit procedures included determining whether the information reconciles to thefinancial statements or the underlying accounting and other records, as applicable, and performing procedures to test the We have served as the Plan’s auditor since 1991. PACCAR IncSavings Investment PlanStatement of Changes in Net Assets Available for BenefitsYear Ended December 31, 2025 PACCAR IncSavings Investment PlanNotes to Financial StatementsDecember 31, 2025 1. Description of the Plan The PACCAR Inc Savings Investment Plan (the Plan) is a defined contribution plan covering substantially all non-union U.S.employees of PACCAR Inc and its U.S. subsidiaries (collectively, the Company). Covered employees are eligible to participate inthe Plan and receive employer contributions immediately upon participation. The Plan is subject to the provisions of the EmployeeRetirement Income Security Act of 1974 (ERISA) and the Internal Revenue Code (the Code). This description of the Plan provides Contributions Newly hired employees are automatically enrolled in the Plan at a pre-tax contribution rate of 5% unless they elect to notparticipate in the Plan within 45 days. Participants may elect to contribute no less than 1% and no more than 75% of their respectiveannual compensation (as defined in the Plan document) subject to the Code’s annual maximum of $23,500 for 2025. Participantsmay elect to contribute pre-tax contributions, Roth post-tax contributions, or a