Smurfit Westrock director adds 344 dividend stock units

A Smurfit Westrock plc director increased her RSU-based holdings via dividend-equivalent accruals tied to a quarterly dividend.

Rhea-AI Filing Summary

Smurfit Westrock plc (SW) director Colleen F. Arnold reported an acquisition of 343.768 ordinary shares on September 10, 2026, through additional restricted stock units that accrued as dividend equivalents on an existing award. After this accrual, she holds 36,622.748 ordinary shares directly, primarily in the form of restricted stock units, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Grant/Award: 343.768 shares

Grant/Award 1 txn

Insider Arnold Colleen F.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Ordinary Shares F1, F2	343.768	$0.00	$0.00

Holdings After Transaction: Ordinary Shares — 36,622.748 shares (Direct)

Footnotes (2)

1. F1. In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4523 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.
2. F2. Includes 4,537 restricted stock units which will vest on the earlier of (i) May 1, 2027, or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders and 27,897.748 fully vested restricted stock units that will be settled in ordinary shares following the Reporting Person's cessation of service as a member of the Issuer's board of directors in accordance with the terms of the WestRock Company 2016 Deferred Compensation Plan for Non-Employee Directors.

Key Figures

Shares acquired: 343.768 shares Total direct holdings after transaction: 36,622.748 shares Quarterly dividend per ordinary share: $0.4523 per share +2 more

5 metrics

Shares acquired 343.768 shares Additional restricted stock units accrued on September 10, 2026 as dividend equivalents

Total direct holdings after transaction 36,622.748 shares Ordinary shares (largely RSUs) held by Colleen F. Arnold after the reported acquisition

Quarterly dividend per ordinary share $0.4523 per share Dividend that generated the dividend-equivalent RSU accrual

Unvested RSUs 4,537 units RSUs vesting on the earlier of May 1, 2027, or the next annual stockholders’ meeting

Fully vested deferred RSUs 27,897.748 units Fully vested RSUs to be settled in ordinary shares after cessation of board service

Key Terms

restricted stock units, dividend equivalents, cessation of service, Deferred Compensation Plan

4 terms

restricted stock units financial

"In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued"

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.

dividend equivalents financial

"additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment"

Payments tied to employee or contractor equity awards that mirror the cash dividends paid on the company’s stock; they give the holder the same economic benefit as owning the shares without transferring actual shares—often paid in cash or additional award units when the award becomes payable. Investors care because these payments affect a company’s compensation costs, cash flow and potential share dilution, and they signal how management is being rewarded and aligned with shareholders.

cessation of service regulatory

"will be settled in ordinary shares following the Reporting Person's cessation of service as a member"

Deferred Compensation Plan financial

"in accordance with the terms of the WestRock Company 2016 Deferred Compensation Plan for Non-Employee Directors"

A deferred compensation plan is an arrangement where an employer agrees to pay part of an employee’s pay or bonus at a later date instead of immediately, often to reduce current tax bills or to tie rewards to long-term performance. For investors it matters because these promises create future cash obligations and influence executive incentives and retention; they can affect a company’s reported liabilities, cash flow planning and the risk profile if the business faces financial trouble.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Smurfit Westrock plc (SW) report for Colleen F. Arnold?

Colleen F. Arnold reported an acquisition of 343.768 ordinary shares on September 10, 2026, via additional restricted stock units that accrued as dividend equivalents on an existing award.

How many Smurfit Westrock (SW) shares does Colleen F. Arnold hold after this Form 4 transaction?

Following the reported transaction, Colleen F. Arnold holds 36,622.748 ordinary shares directly, largely in the form of restricted stock units linked to her board service compensation.

What triggered the new restricted stock units reported for Smurfit Westrock (SW)?

The additional restricted stock units accrued as dividend equivalents in connection with Smurfit Westrock plc’s payment of a quarterly dividend of $0.4523 per ordinary share, in line with the terms of the existing RSU award.

When will Colleen F. Arnold’s unvested Smurfit Westrock (SW) restricted stock units vest?

The filing states that 4,537 restricted stock units will vest on the earlier of May 1, 2027, or the date of the next annual meeting of Smurfit Westrock plc’s stockholders.

What portion of Colleen F. Arnold’s Smurfit Westrock (SW) RSUs are already vested but deferred?

The filing notes 27,897.748 fully vested restricted stock units that will be settled in ordinary shares after her cessation of service as a board member under the WestRock Company 2016 Deferred Compensation Plan for Non-Employee Directors.

Was the Smurfit Westrock (SW) insider transaction under a Rule 10b5-1 plan?

No. The Form 4 indicates that no Rule 10b5-1 trading plan is reported for this transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/14/2026 - 11:21 AM Accepted by SEC EDGAR 09/14/2026 - 11:20 AM 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^*

Arnold Colleen F.

(Last) (First) (Middle)

BEECH HILL, CLONSKEAGH

(Street)

DUBLIN 4 D04 N2R2

(City) (State) (Zip)

IRELAND

(Country)

2. Issuer Name and Ticker or Trading Symbol
Smurfit Westrock plc [ SW ]

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)
09/10/2026

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
Ordinary Shares	09/10/2026		A		343.768	A	$0(1)	36,622.748(2)	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. In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4523 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

2. Includes 4,537 restricted stock units which will vest on the earlier of (i) May 1, 2027, or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders and 27,897.748 fully vested restricted stock units that will be settled in ordinary shares following the Reporting Person's cessation of service as a member of the Issuer's board of directors in accordance with the terms of the WestRock Company 2016 Deferred Compensation Plan for Non-Employee Directors.

Remarks:

	/s/ Ciara O'Riordan, attorney-in-fact for Colleen F. Arnold	09/14/2026
	** 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)