[Form 4] Dorman Products, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Dorman Products, Inc. director and President and CEO Kevin M. Olsen reported tax-related stock transactions. On 2026-03-03 and 2026-03-04, common shares were withheld by the company upon the vesting of restricted stock units to satisfy his tax withholding obligations, which are treated as dispositions under Section 16. After the 2026-03-04 withholding transaction, he held 99,137.0283 shares of common stock directly.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Olsen Kevin M.

Role President and CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	2,724	$116.16	$316K
Tax Withholding	Common Stock	2,072	$116.22	$241K

Holdings After Transaction: Common Stock — 99,137.028 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Olsen Kevin M.

(Last) (First) (Middle)

C/O DORMAN PRODUCTS, INC.

3400 EAST WALNUT STREET

(Street)

COLMAR PA 18915

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Dorman Products, Inc. [ DORM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
03/03/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/03/2026		F		2,072(1)	D	$116.22	101,861.0283	D
Common Stock	03/04/2026		F		2,724(1)	D	$116.16	99,137.0283	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These shares were withheld by the Issuer upon the vesting of restricted stock units to satisfy the Reporting Person's tax withholding obligations. Such withholding is treated as a disposition of securities under Section 16 of the Securities Exchange Act of 1934, as amended.

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.

	/s/ Frank J. Mahr, by Power of Attorney	03/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider activity did Dorman Products (DORM) report for Kevin M. Olsen?

Dorman Products reported that Kevin M. Olsen, its President and CEO, had common shares withheld by the company to cover tax obligations from vesting restricted stock units. These withholdings are classified as dispositions of securities under Section 16 rules.

How many Dorman Products (DORM) shares did Kevin M. Olsen hold after the latest transaction?

After the most recent reported tax-withholding disposition on 2026-03-04, Kevin M. Olsen directly owned 99,137.0283 shares of Dorman Products common stock. This figure reflects his holdings immediately following that specific withholding transaction.

Were Kevin M. Olsen’s Dorman Products (DORM) transactions open-market sales?

No, the transactions were not open-market sales. The filing states the shares were withheld by Dorman Products upon restricted stock unit vesting to satisfy Kevin M. Olsen’s tax withholding obligations, treated as dispositions for Section 16 reporting purposes.

What does transaction code “F” mean in the Dorman Products (DORM) Form 4?

In this Form 4, transaction code “F” indicates payment of an exercise price or tax liability by delivering securities. Here, Dorman Products withheld shares from Kevin M. Olsen to satisfy his tax withholding obligations on vesting restricted stock units.

How many tax-withholding dispositions were reported for Dorman Products (DORM)?

The insider data show two non-derivative transactions coded as tax-withholding dispositions. Both involved common stock withheld by Dorman Products to cover Kevin M. Olsen’s tax obligations upon restricted stock unit vesting and are reported as dispositions under Section 16.