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

Rhea-AI Filing Summary

Donna M. Long, SVP and Chief Information Officer of Dorman Products, Inc. (DORM), reported an acquisition on 08/14/2025 of 807 shares through an employee stock option transaction priced at $84.93 per share. Following the reported transaction, she beneficially owns 18,667.8738 shares directly. The filing notes the option grant originally covered 1,615 shares and vested in four equal annual installments beginning March 6, 2020. The Form 4 was signed by Frank J. Mahr by power of attorney on 08/18/2025.

Positive

• Increased insider alignment: SVP/CIO acquired 807 shares, bringing direct beneficial ownership to 18,667.8738 shares.
• Transparent disclosure: Filing includes vesting history (original 1,615-share grant vesting in four annual installments beginning 03/06/2020) and was properly executed by power of attorney.

Negative

• None.

Insights

Financial Analyst

TL;DR Insider exercised/received 807 shares at $84.93, modestly increasing direct ownership to 18,667.8738 shares.

The transaction represents a routine employee stock option vesting/exercise for a senior executive rather than a market purchase or sale. The reported per-share price of $84.93 reflects the option exercise price tied to the grant. The increase of 807 shares is small relative to total ownership but aligns executive compensation with shareholder value through equity participation. No cash proceeds, sales, or other disposition are reported in this Form 4.

Corporate Governance Expert

TL;DR This is a standard, disclosed option vesting/exercise by an officer under an existing equity plan.

The filing clearly documents an option-related acquisition and provides the grant vesting schedule, which supports proper disclosure and compliance with Section 16. The explanation states the original option covered 1,615 shares and vested in four equal annual installments beginning March 6, 2020, which explains the partial vesting and the 807-share movement. The Form 4 was executed via power of attorney and signed on 08/18/2025, indicating administrative handling consistent with routine filings.

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
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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)
08/14/2025

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	08/14/2025		M		807	A	$84.93	18,667.8738	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
Employee Stock Option (right to buy)	$84.93	08/14/2025		M			807	(1)	03/06/2027	Common Stock	807	$0	424	D

Explanation of Responses:

1. The option, originally an option for a total of 1,615 shares, vested in four equal annual installments beginning on March 6, 2020, which was the first anniversary of the date of grant.

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	08/18/2025
	** 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.
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FAQ

What transaction did Donna M. Long report on Form 4 for DORM?

The Form 4 reports an acquisition of 807 shares on 08/14/2025 via an employee stock option transaction priced at $84.93 per share.

How many DORM shares does Donna Long beneficially own after the transaction?

After the reported transaction Donna Long beneficially owns 18,667.8738 shares directly.

Was this option grant previously disclosed and how did it vest?

Yes; the filing explains the original option covered 1,615 shares and vested in four equal annual installments beginning on 03/06/2020.

Who signed the Form 4 and when was it signed?

The Form 4 was signed by Frank J. Mahr, by Power of Attorney on 08/18/2025.

What role does Donna Long hold at Dorman Products?

The filing lists Donna M. Long as SVP, CIO (Senior Vice President, Chief Information Officer).