Director of Dorman Products (NASDAQ: DORM) reports minor tax withholding of shares

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Dorman Products director Richard T. Riley reported a small, routine tax-related share disposition. On the vesting of restricted stock units, 33 shares of Common Stock were withheld by the company at $116.16 per share to satisfy his tax withholding obligations. After this withholding, he directly holds 28,968 Common shares, so the transaction represents a very minor adjustment tied to equity compensation rather than an open-market trade.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider RILEY RICHARD T

Role null

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	33	$116.16	$4K

Holdings After Transaction: Common Stock — 28,968 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares withheld for taxes: 33 shares Withholding price: $116.16 per share Shares held after transaction: 28,968 shares +2 more

5 metrics

Shares withheld for taxes 33 shares Tax-withholding disposition on restricted stock unit vesting

Withholding price $116.16 per share Value used for 33-share tax withholding

Shares held after transaction 28,968 shares Direct Common Stock ownership following tax withholding

Transaction code F Payment of tax liability by delivering securities

Transaction direction dispose Tax-withholding disposition, not an open-market sale

Key Terms

restricted stock units, tax withholding obligations, Section 16 of the Securities Exchange Act of 1934, disposition of securities

4 terms

restricted stock units financial

"These shares were withheld by the Issuer upon the vesting of restricted stock units to satisfy the Reporting Person's tax withholding obligations."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligations financial

"These shares were withheld by the Issuer upon the vesting of restricted stock units to satisfy the Reporting Person's tax withholding obligations."

Section 16 of the Securities Exchange Act of 1934 regulatory

"Such withholding is treated as a disposition of securities under Section 16 of the Securities Exchange Act of 1934, as amended."

A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.

disposition of securities regulatory

"Such withholding is treated as a disposition of securities under Section 16 of the Securities Exchange Act of 1934, as amended."

Form 4 Insider Transactions: What Each Field Means →

05/19/2026 - 04:02 PM

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^*

RILEY RICHARD T

(Last)

(First)

(Middle)

C/O DORMAN PRODUCTS, INC.

3400 E. WALNUT ST.

(Street)

COLMAR

PENNSYLVANIA

18915

(City)

(State)

(Zip)

UNITED STATES

(Country)

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
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/15/2026		F		33⁽¹⁾	D	$116.16	28,968	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 equity 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	05/18/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Dorman Products (DORM) director Richard T. Riley report?

Director Richard T. Riley reported a small tax-withholding disposition of 33 shares of Dorman Products Common Stock. The shares were withheld by the company when restricted stock units vested to cover his tax obligations, not sold in the open market.

How many Dorman Products (DORM) shares were involved in Richard T. Riley’s Form 4 filing?

The filing shows 33 Common Stock shares were withheld to satisfy tax obligations at $116.16 per share. This occurred when restricted stock units vested, and it is treated as a disposition under Section 16 rather than a discretionary buy or sell transaction.

What is Richard T. Riley’s ownership in Dorman Products (DORM) after this transaction?

After the tax-withholding disposition, Richard T. Riley directly holds 28,968 shares of Dorman Products Common Stock. This indicates the 33 shares withheld for taxes are very small relative to his overall direct equity position in the company.

Was the Dorman Products (DORM) Form 4 transaction an open-market sale?

No, the transaction was not an open-market sale. The 33 shares of Common Stock were withheld by Dorman Products upon restricted stock unit vesting to pay Richard T. Riley’s tax withholding obligations, which is reported as a disposition under Section 16 rules.

Why is a tax-withholding disposition like this reported on a Form 4 for Dorman Products (DORM)?

Tax-withholding dispositions must be reported because they count as dispositions of securities under Section 16. When Dorman Products withholds shares from Richard T. Riley’s vested restricted stock units to cover taxes, those 33 shares are treated as a reportable transaction.