John McKnight - 01 Dec 2025 Form 4 Insider Report for Dorman Products, Inc. (DORM)

Reporting relationship: President, Heavy Duty
Issuer ticker: DORM
Reported as of: 01 Dec 2025
Net transaction value: -$218,202
SEC form: 4
Accepted by SEC: 03 Dec 2025, 16:05:53 UTC
Prior SEC filing: 05 Mar 2025
Next SEC filing: 15 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ Frank J. Mahr, by Power of Attorney

Key filing fact

John McKnight filed Form 4 for Dorman Products, Inc. (DORM) on 03 Dec 2025.

Key facts

This page summarizes John McKnight's Form 4 filing for Dorman Products, Inc. (DORM).
10 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 03 Dec 2025, 16:05.

Change

Previous filing in this sequence was filed on 05 Mar 2025.
Current net transaction value: -$218,202.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001932069 Primary reporting owner

McKnight John

Relationship: President, Heavy Duty
Address: C/O DORMAN PRODUCTS, INC., 3400 EAST WALNUT STREET, COLMAR
Signature: /s/ Frank J. Mahr, by Power of Attorney
Signature date: 03 Dec 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DORM transaction

Common Stock

Options Exercise

Transaction value: $99,964
Shares: +1,356
Change %: +12%
Price: $73.72
Shares after: 12,734
Date: 01 Dec 2025
Ownership: Direct

DORM transaction

Common Stock

Options Exercise

Transaction value: $197,828
Shares: +1,950
Change %: +15%
Price: $101.45
Shares after: 14,684
Date: 01 Dec 2025
Ownership: Direct

DORM transaction

Common Stock

Options Exercise

Transaction value: $60,032
Shares: +623
Change %: +4.2%
Price: $96.36
Shares after: 15,307
Date: 01 Dec 2025
Ownership: Direct

DORM transaction

Common Stock

Options Exercise

Transaction value: $64,170
Shares: +703
Change %: +4.6%
Price: $91.28
Shares after: 16,010
Date: 01 Dec 2025
Ownership: Direct

DORM transaction

Common Stock

Sale

Transaction value: $520,682
Shares: -3,987
Change %: -25%
Price: $130.60
Shares after: 12,023
Date: 01 Dec 2025
Ownership: Direct
Footnotes: F1

DORM transaction

Common Stock

Sale

Transaction value: $119,514
Shares: -911
Change %: -7.6%
Price: $131.19
Shares after: 11,112
Date: 01 Dec 2025
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

DORM transaction Derivative

Employee Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -1,356
Change %: -49%
Price: $0.000000
Shares after: 1,392
Date: 01 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,356
Exercise price: $73.72
Footnotes: F3

DORM transaction Derivative

Employee Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -1,950
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 01 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,950
Exercise price: $101.45
Footnotes: F4

DORM transaction Derivative

Employee Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -623
Change %: -50%
Price: $0.000000
Shares after: 623
Date: 01 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 623
Exercise price: $96.36
Footnotes: F5

DORM transaction Derivative

Employee Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -703
Change %: -33%
Price: $0.000000
Shares after: 1,406
Date: 01 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 703
Exercise price: $91.28
Footnotes: F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote 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.

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.

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.

Footnote F4

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

Footnote F5

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

Footnote F6

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

SEC remarks

The filing of this Statement shall not be construed as an admission (a) that the person filing this Statement is, for the purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the beneficial owner of any securities covered by this Statement, or (b) that this Statement is legally required to be filed by such person.