ACCO director granted 32,809 RSUs in equity award

Keller Robert J reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Keller Robert J reported acquisition or exercise transactions in this Form 4 filing.

ACCO BRANDS Corp director Robert J. Keller received a grant of 32,809 Restricted Stock Units (RSUs) as equity compensation. The RSUs were awarded at a price of $0.00 per unit and are tied to the company’s common stock on a one-for-one basis.

After this grant, Keller holds a total of 255,140.87 RSUs directly. According to the terms, these RSUs are granted under the company’s Incentive Plan and have been deferred under the Deferred Compensation Plan for Non-Employee Directors. They either vest immediately or on the one-year anniversary of the grant date, and each RSU will settle into one share of common stock upon the earlier of Keller’s death or disability, or when he ceases to serve on the Board of Directors.

Insider Trade Summary

Grant/Award: 32,809 shares

Grant/Award 1 txn

Insider Keller Robert J

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	32,809	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 255,140.87 contracts (Direct)

Footnotes (1)

1. F1. Restricted Stock Units (RSUs) granted under the Issuer's Incentive Plan. RSUs are immediately vested or vest on the one year anniversary of the grant date, but in either case, have been deferred under the Issuer's Deferred Compensation Plan for Non-Employee Directors. Each RSU represents the right to receive one share of the Issuer's common stock upon the earlier of the date of the reporting person's death or disability, or cessation of service as a member of the Board of Directors.

Key Figures

RSUs granted: 32,809 units Grant price per RSU: $0.00 per unit Total RSUs after grant: 255,140.87 units +1 more

4 metrics

RSUs granted 32,809 units Restricted Stock Units granted to director on May 19, 2026

Grant price per RSU $0.00 per unit Equity award under Incentive Plan

Total RSUs after grant 255,140.87 units Director’s RSU balance following the transaction

Underlying common shares 32,809 shares Each RSU represents one share of common stock

Key Terms

Restricted Stock Units, Incentive Plan, Deferred Compensation Plan for Non-Employee Directors, cessation of service

4 terms

Restricted Stock Units financial

"Restricted Stock Units (RSUs) granted under the Issuer's Incentive Plan."

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.

Incentive Plan financial

"RSUs granted under the Issuer's Incentive Plan."

Deferred Compensation Plan for Non-Employee Directors financial

"have been deferred under the Issuer's Deferred Compensation Plan for Non-Employee Directors."

cessation of service regulatory

"upon the earlier of the date of the reporting person's death or disability, or cessation of service as a member of the Board of Directors."

FAQ

What did ACCO (ACCO) director Robert J. Keller report in this Form 4?

Robert J. Keller reported receiving a grant of 32,809 Restricted Stock Units from ACCO BRANDS Corp. These RSUs are a form of stock-based compensation and increase his total deferred equity holdings to 255,140.87 units tied to the company’s common stock.

How many ACCO (ACCO) Restricted Stock Units did Robert J. Keller receive?

Robert J. Keller received 32,809 Restricted Stock Units. Each unit represents the right to receive one share of ACCO BRANDS common stock in the future, subject to vesting and settlement conditions linked to his service on the Board of Directors.

What are the vesting terms of Robert J. Keller’s new ACCO RSU grant?

The RSUs either vest immediately or on the one-year anniversary of the grant date. However, settlement into common stock is deferred until the earlier of Keller’s death, disability, or when he stops serving as a member of ACCO’s Board of Directors.

When will Robert J. Keller receive ACCO common stock from these RSUs?

Each RSU converts into one ACCO BRANDS common share upon the earlier of his death, disability, or cessation of service as a director. Until that settlement date, the units remain deferred under the company’s Deferred Compensation Plan for Non-Employee Directors.

What is Robert J. Keller’s total ACCO RSU holding after this transaction?

Following this grant, Robert J. Keller directly holds 255,140.87 Restricted Stock Units. This figure reflects his cumulative deferred stock-based compensation as a non-employee director, all ultimately payable in shares of ACCO BRANDS common stock under plan terms.

Did Robert J. Keller buy or sell ACCO shares in the market in this Form 4?

No market purchase or sale occurred in this Form 4. The filing shows a grant of 32,809 Restricted Stock Units as compensation, awarded at a price of $0.00 per unit, rather than an open-market buy or sell transaction.

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Accepted by SEC EDGAR 05/20/2026 - 02:44 PM Learn about SEC filing dates

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^*

Keller Robert J

(Last) (First) (Middle)

C/O ACCO BRANDS CORPORATION

(Street)

LAKE ZURICH ILLINOIS 60047

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ACCO BRANDS Corp [ ACCO ]

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)
05/19/2026

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)
			Code	V	Amount	(A) or (D)	Price

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
Restricted Stock Units	$0	05/19/2026		A		32,809		(1)	(1)	Common Stock	32,809	$0	255,140.87	D

Explanation of Responses:

1. Restricted Stock Units (RSUs) granted under the Issuer's Incentive Plan. RSUs are immediately vested or vest on the one year anniversary of the grant date, but in either case, have been deferred under the Issuer's Deferred Compensation Plan for Non-Employee Directors. Each RSU represents the right to receive one share of the Issuer's common stock upon the earlier of the date of the reporting person's death or disability, or cessation of service as a member of the Board of Directors.

	/s/ Kathryn D. Ingraham, Attorney-in-fact for Robert J. Keller	05/20/2026
	** 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)