Darrin C. Siver - 01 Jan 2026 Form 4 Insider Report for PACCAR INC (PCAR)

Role: EXECUTIVE VICE PRESIDENT
Signature: Michael R. Beers, by Power of Attorney
Issuer symbol: PCAR
Transactions as of: 01 Jan 2026
Net transactions value: -$166,017
Form type: 4
Filing time: 02 Jan 2026, 17:56:55 UTC
Previous filing: 05 Dec 2025
Next filing: 08 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
SIVER DARRIN C	EXECUTIVE VICE PRESIDENT	777 - 106TH AVE. N.E., BELLEVUE	Michael R. Beers, by Power of Attorney	02 Jan 2026	0001664292

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PCAR	Common Stock	Options Exercise	$0	+5,915	+9.5%	$0.000000	68,037	01 Jan 2026	Direct	F1
transaction	PCAR	Common Stock	Tax liability	$166,017	-1,516	-2.2%	$109.51	66,521	02 Jan 2026	Direct	F2
holding	PCAR	Common Stock						24,646	01 Jan 2026	By PACCAR Savings Investment Plan (SIP)

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	PCAR	Stock Units (LTIP)	Options Exercise	$0	-5,915	-51%	$0.000000	5,754	01 Jan 2026	Common Stock	5,915		Direct	F1, F3
holding	PCAR	Stock Option						38,900	01 Jan 2026	Common Stock	38,900	$71.95	Direct
holding	PCAR	Stock Option						28,610	01 Jan 2026	Common Stock	28,610	$104.16	Direct
holding	PCAR	Stock Option						25,460	01 Jan 2026	Common Stock	25,460	$109.13	Direct
holding	PCAR	Stock Units (DCP)						19,702	01 Jan 2026	Common Stock	19,702		Direct	F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Restricted stock units converted to common stock on a one-for-one basis upon satisfaction of all applicable vesting conditions.
F2	Shares withheld for payment of tax liability in connection with the vesting of restricted shares and/or restricted stock units.
F3	Restricted stock units awarded under PACCAR Long Term Incentive Plan (LTIP) and convertible to common stock on a one-for-one basis upon satisfaction of all applicable vesting conditions. Each award vests in four equal installments commencing on March 1 following the award and January 1 of the next three years.
F4	Share units held in deferred phantom stock account under PACCAR Deferred Compensation Plan (DCP) convertible to common stock on a one-for-one basis upon satisfaction of all applicable conditions.