Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person * Peters John 2. Issuer Name and Ticker or Trading Symbol ACCO BRANDS Corp [ACCO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP ACCO Brands, Pres. No. Ame (Last) (First) (Middle) C/O ACCO BRANDS 3. Date of Earliest Transaction (Month/Day/Year) 09/10/2025 (Street) LAKE ZURICH, IL 60047 4. If Amendment, Date 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 (City) (State) (Zip) 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

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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 Underlying Securities (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 of Derivative Security: 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

Restricted Stock Units(1)

$ 0

09/10/2025

A

405.20(2)

07/01/2028

07/01/2028

Common Stock

405.20

$ 0

21,853.20

D

Restricted Stock Units(3)

$ 0

09/10/2025

A

332.10(2)

03/14/2026

03/14/2026

Common Stock

332.10

$ 0

17,909.10(4)

D

Restricted Stock Units(5)

$ 0

09/10/2025

A

386.80(2)

03/12/2027

03/12/2027

Common Stock

386.80

$ 0

20,860.80(6)

D

Restricted Stock Units(7)

$ 0

09/10/2025

A

406.50(2)

03/11/2028

03/11/2028

Common Stock

406.50

$ 0

21,924.50(8)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Peters John C/O ACCO BRANDS LAKE ZURICH, IL 60047			SVP ACCO Brands, Pres. No. Ame

Signatures

Kathryn D. Ingraham, attorney-in-fact for John Peters		09/12/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Restricted Stock Units (RSUs) granted under the Issuer's Incentive Plan. Each RSU represents the right to receive one share of the Issuer's common stock on July 1, 2028, provided that the Reporting Person remains employed by the Issuer at that time, subject to acceleration as provided in said Plan.
(2)	Represents Restricted Stock Units (RSUs) acquired pursuant to the dividend equivalent provisions of the Reporting Person's earned and outstanding RSU awards.
(3)	Restricted Stock Units (RSUs) granted under the Issuer's Incentive Plan. Each RSU represents the right to receive one share of the Issuer's common stock on March 14, 2026, provided that the Reporting Person remains employed by the Issuer at that time, subject to acceleration as provided in said Plan.
(4)	The number of derivative securities beneficially owned includes an additional 2,221 shares underlying the RSUs that were inadvertently excluded in the total number reported in the Reporting Person's Form 3.
(5)	Restricted Stock Unites (RSUs) granted under the Issuer's Incentive Plan. Each RSU represents the right to receive one share of the Issuer's common stock March 12, 2027, provided that the Reporting Person remains employed by the Issuer at that time, subject to acceleration as provided in said Plan.
(6)	The number of derivative securities beneficially owned includes an additional 1,817 shares underlying the RSUs that were inadvertently excluded in the total number reported in the Reporting Person's Form 3.
(7)	Restricted Stock Units (RSUs) granted under the Issuer's Incentive Plan. Each RSU represents the right to receive one share of the Issuer's common stock on March 11, 2028, provided that the Reporting Person remains employed by the Issuer at that time, subject to acceleration as provided in said Plan.
(8)	The number of derivative securities beneficially owned includes an additional 814 shares underlying the RSUs that were inadvertently excluded in the total number reported in the Reporting Person's Form 3.

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