FORM 10-Q ☒Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of1934 For the quarterly period ended June 30, 2026 OR ☐Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of1934 For the transition period fromto Commission File No. 001-14817 PACCAR Inc (Exact name of registrant as specified in its charter) (425) 468-7400(Registrant's telephone number, including area code) Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) ofthe Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrantwas required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to besubmitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or forsuch shorter period that the registrant was required to submit such files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer,a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,”“accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b‑2 of the ExchangeAct. If an emerging growth company, indicate by check mark if the registrant has elected not to use the extendedtransition period for complying with any new or revised financial accounting standards provided pursuant to Section13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☒ Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicabledate. Common Stock, $1 par value — 526,364,953shares as of July 24, 2026 PACCAR Inc – Form 10-Q INDEX PagePART I.FINANCIAL INFORMATION:ITEM 1.FINANCIAL STATEMENTS:Consolidated Statements of Comprehensive Income –Three and Six Months Ended June 30, 2026 and 2025 (Unaudited)3Consolidated Balance Sheets –June 30, 2026 (Unaudited) and December 31, 20254Condensed Consolidated Statements of Cash Flows –Six Months Ended June 30, 2026 and 2025 (Unaudited)6Consolidated Statements of Stockholders’ Equity –Three and Six Months Ended June 30, 2026 and 2025 (Unaudited)7Notes to Consolidated Financial Statements (Unaudited)8ITEM 2.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITIONAND RESULTS OF OPERATIONS36ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK55ITEM 4.CONTROLS AND PROCEDURES55PART II.OTHER INFORMATION:ITEM 1.LEGAL PROCEEDINGS56ITEM 1A.RISK FACTORS56ITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS56ITEM 3.DEFAULTS UPON SENIOR SECURITIES56ITEM 4.MINE SAFETY DISCLOSURES56ITEM 5.OTHER INFORMATION56ITEM 6.EXHIBITS57INDEX TO EXHIBITS57SIGNATURE59 PART I – FINANCIAL INFORMATION See Notes to Consolidated Financial Statements. See Notes to Consolidated Financial Statements. Notes to Consolidated Financial Statements(Unaudited) NOTE A - Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in accordancewith generally accepted accounting principles (GAAP) for interim financial information and with theinstructions to Form 10‑Q and Article 10 of Regulation S-X. Accordingly, they do not include all ofthe information and footnotes required by GAAP for complete financial statements. In the opinion ofmanagement, all adjustments (consisting of normal recurring accruals) considered necessary for a fairpresentation have been included. Operating results for the three and six months ended June 30, 2026are not necessarily indicative of the results that may be expected for the year ending December 31,2026. For further information, refer to the consolidated financial statements and footnotes included inPACCAR Inc’s (PACCAR or the Company) Annual Report on Form 10‑K for the year endedDecember 31, 2025. Equity Method Investment: In 2024, PACCAR and three partners completed the formation of a U.S.-based battery manufacturing joint venture, Amplify Cell Technologies, with PACCAR owning a 30percent interest. The joint venture meets the definition of a variable interest entity since the equity-at-risk is not currently sufficient to support the future operations of the joint venture. All significantdecisions require majority or super-majority approval of the board. As a result, PACCAR is not theprimary beneficiary and the Company uses the equity method to account for the investment. Under theequity method, the original investments in the joint venture are recorded at cost and subsequentlyadjusted by the Company's share of equity in income or losses. The investment is include