Dorman Products (DORM) SVP reports tax-withholding share disposals

Rhea-AI Filing Summary

Dorman Products, Inc. reported that SVP and CIO Donna M. Long disposed of shares of common stock to cover tax withholding obligations tied to restricted stock unit vesting. On March 3, 2026, 221 shares were withheld at $116.2200 per share. On March 4, 2026, 531 shares were withheld at $116.1600 per share. After these tax-withholding dispositions, Long held 21,019.8738 shares of Dorman Products common stock directly.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Long Donna M.

Role SVP, CIO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	531	$116.16	$62K
Tax Withholding	Common Stock	221	$116.22	$26K

Holdings After Transaction: Common Stock — 21,019.874 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^*

Long Donna 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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, CIO

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		221(1)	D	$116.22	21,550.8738	D
Common Stock	03/04/2026		F		531(1)	D	$116.16	21,019.8738	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 transactions did Dorman Products (DORM) report for Donna M. Long?

Dorman Products reported that SVP and CIO Donna M. Long disposed of common stock shares through tax-withholding transactions related to restricted stock unit vesting, rather than open-market sales, across two dates in early March 2026.

How many Dorman Products (DORM) shares were withheld for Donna M. Long’s taxes?

A total of 221 common shares were withheld on March 3, 2026, at $116.2200 per share and 531 common shares on March 4, 2026, at $116.1600 per share to satisfy Donna M. Long’s tax withholding obligations.

What was Donna M. Long’s Dorman Products (DORM) shareholding after these transactions?

Following the March 4, 2026 tax-withholding disposition, SVP and CIO Donna M. Long directly held 21,019.8738 shares of Dorman Products common stock, as reported in the Form 4 insider filing data.

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

No, the transactions were coded as tax-withholding dispositions. The shares were withheld by Dorman Products upon vesting of restricted stock units to satisfy Donna M. Long’s tax obligations, rather than executed as open-market share sales.

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

Transaction code F indicates that shares were disposed of to pay an exercise price or tax liability. For Donna M. Long, the filing states that Dorman Products withheld shares upon restricted stock unit vesting to cover her tax withholding obligations.

Does the Dorman Products (DORM) Form 4 show buying or selling activity by Donna M. Long?

The Form 4 shows disposition activity classified as tax-withholding, not open-market buying or selling. Shares were withheld by Dorman Products upon restricted stock unit vesting, and are treated as dispositions under Section 16 reporting rules.