Item 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE.

Item 401(a), (d), and (e) of Regulation S-K:

The following information is included in the proxy statement for the annual stockholders meeting of April 29, 2025 and is incorporated herein by reference:

Identification of directors, family relationships, and business experience is included under the caption “ITEM 1: ELECTION OF DIRECTORS.”

Item 401(b) of Regulation S-K:

Information about the Company’s executive officers is included in Part I, Item 1 of this Form 10-K.

Item 405 of Regulation S-K:

The information required by this item is included in the proxy statement for the annual stockholders meeting of April 29, 2025 and is incorporated herein by reference.

Item 406 of Regulation S-K:

The Company has adopted a Code of Ethics applicable to the registrant’s senior financial officers including the Chief Executive Officer and Chief Financial Officer. The Company, in accordance with Item 406 of Regulation S‑K, has posted this Code of Ethics on its website at www.paccar.com. The Company intends to disclose on its website any amendments to, or waivers from, its Code of Ethics that are required to be publicly disclosed pursuant to the rules of the Securities and Exchange Commission. The information on the Company’s website is not incorporated by reference into this report.

Item 407(d)(4) and 407(d)(5) of Regulation S‑K:

The following information is included in the proxy statement for the annual stockholders meeting of April 29, 2025 and is incorporated herein by reference:

Identification of the audit committee is included under the caption “THE AUDIT COMMITTEE.”

Identification of audit committee financial experts is included under the caption “AUDIT COMMITTEE REPORT.”

Item 408(b) of Regulation S-K:

The Company has adopted insider trading policies and procedures governing the purchase and sale of the Company’s securities by directors, officers and employees that are reasonably designed to promote compliance with applicable insider trading laws, rules and regulations and Nasdaq listing standards. The Company’s insider trading policies and procedures are filed as Exhibit 19 to this Form 10-K.