UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2022 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from ____ to ____. Commission File Number 001-14817 PACCAR Inc (Exact name of Registrant as specified in its charter) Delaware 91-0351110 (State or other jurisdiction of incorpora ...