[Form 4] UNIFIRST CORP Insider Trading Activity

Rhea-AI Filing Summary

UniFirst (UNF) reported insider transactions by its President and CEO, who is also a Director, dated 10/31/2025.

The filing shows a disposition of 1,696 shares under code F at $154.35 per share, representing shares withheld to cover taxes upon restricted stock unit vesting. It also reports an acquisition of 1,898 restricted stock units at $0 based on performance achievement, with 50% scheduled to vest on 10/31/2026 and 50% on 10/31/2027.

Following these transactions, the reporting person’s beneficial ownership was 29,102 shares, held directly.

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

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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^*

Sintros Steven S

(Last) (First) (Middle)

C/O UNIFIRST CORP

68 JONSPIN ROAD

(Street)

WILMINGTON MA 01887

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
UNIFIRST CORP [ UNF ]

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)
10/31/2025

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	10/31/2025		F		1,696(1)	D	$154.35	27,204	D
Common Stock	10/31/2025		A		1,898(2)	A	$0	29,102(3)	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. Represents shares of Common Stock withheld by UniFirst Corporation to satisfy certain tax withholding obligations in connection with the vesting of certain restricted stock units.

2. Represents restricted stock units that were earned based on the achievement of certain performance criteria and that 50% of such restricted stock units remain subject to vesting on October 31, 2026 and 50% of such restricted stock units remain subject to vesting on October 31, 2027.

3. Consists of (i) 18,385 shares of Common Stock owned by the reporting person, (ii) 645 restricted stock units that will vest in one remaining annual installment on November 19, 2025, (iii) 747 restricted stock units that vest in one remaining annual installment on October 31, 2026, (iv) 1,576 restricted stock units that vest in two remaining equal annual installments on October 31, 2026 and October 31, 2027, (v) 2,738 restricted stock units that vest in three equal annual installments on October 31, 2026, October 31, 2027 and October 31, 2028, (vi) 3,113 restricted stock units that vest in two equal annual installments on October 31, 2026 and October 31, 2027 and (vii) 1,898 restricted stock units that vest in two equal annual installments on October 31, 2026 and October 31, 2027.

	/s/ John Dowd, Attorney-in-Fact	11/04/2025
	** 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 did UniFirst (UNF) disclose in this Form 4?

The President and CEO reported a tax withholding disposition of 1,696 shares and the acquisition of 1,898 RSUs on 10/31/2025.

Why were 1,696 UniFirst shares disposed of?

They were withheld by the company to satisfy tax obligations upon RSU vesting, reported under transaction code F at $154.35 per share.

What RSUs were reported and when do they vest?

The officer earned 1,898 RSUs at $0, with 50% vesting on 10/31/2026 and 50% on 10/31/2027.

What is the officer’s beneficial ownership after these transactions?

Beneficial ownership was reported as 29,102 shares, held directly.

What is the reporting person’s relationship to UniFirst (UNF)?

The reporting person is a Director and serves as President and CEO.

What was the transaction date for the reported activities?

The earliest transaction date was 10/31/2025.

What transaction codes were used in the filing?

Code F for tax withholding on vested shares and code A for RSU acquisition.