Dorman Products, Inc. — Director's Dealing 2025

Dec 3, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Dorman Products, Inc. (DORM)
CIK: 0000868780
Period of Report: 2025-12-01

Reporting Person: McKnight John (President, Heavy Duty)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-01	Common Stock	M	1356	$73.72	Acquired	12734.1061	Direct
2025-12-01	Common Stock	M	1950	$101.45	Acquired	14684.1061	Direct
2025-12-01	Common Stock	M	623	$96.36	Acquired	15307.1061	Direct
2025-12-01	Common Stock	M	703	$91.28	Acquired	16010.1061	Direct
2025-12-01	Common Stock	S	3987	$130.595	Disposed	12023.1061	Direct
2025-12-01	Common Stock	S	911	$131.19	Disposed	11112.1061	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-12-01	Employee Stock Option (right to buy)	$73.72	M	1356	Disposed	2027-11-01	Common Stock (1356)	Direct
2025-12-01	Employee Stock Option (right to buy)	$101.45	M	1950	Disposed	2029-03-02	Common Stock (1950)	Direct
2025-12-01	Employee Stock Option (right to buy)	$96.36	M	623	Disposed	2030-03-02	Common Stock (623)	Direct
2025-12-01	Employee Stock Option (right to buy)	$91.28	M	703	Disposed	2031-03-02	Common Stock (703)	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $130.18 to $131.135. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $131.175 to $131.35. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3: The option vests in four equal annual installments beginning on November 1, 2020, which was the first anniversary of the date of grant.

F4: The option vests in four equal annual installments beginning on March 2, 2022, which was the first anniversary of the date of grant.

F5: The option vests in four equal annual installments beginning on March 2, 2023, which is the first anniversary of the date of grant.

F6: The option vests in four equal annual installments beginning on March 2, 2024, which is the first anniversary of the date of grant.