Smurfit Westrock (SW) director adds RSU dividend units to board holdings

Rhea-AI Filing Summary

Smurfit Westrock plc director Colleen F. Arnold received an automatic grant of 367.176 ordinary share units on account of dividend equivalents tied to a prior restricted stock unit award. This administrative acquisition increased her directly held ordinary shares and share-based units to 33,596.136 in total.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Arnold Colleen F.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Ordinary Shares	367.176	$0.00	--

Holdings After Transaction: Ordinary Shares — 33,596.136 shares (Direct)

Footnotes (1)

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. Includes 4,422 restricted stock units which will vest on the earlier of (i) May 2, 2026 or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders and 27,285.136 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.

Form 4 Insider Transactions: What Each Field Means →

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)
03/18/2026

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	03/18/2026		A		367.176	A	$0(1)	33,596.136(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 4,422 restricted stock units which will vest on the earlier of (i) May 2, 2026 or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders and 27,285.136 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	03/20/2026
	** 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)

FAQ

What did Smurfit Westrock (SW) director Colleen Arnold report on this Form 4?

Colleen F. Arnold reported an acquisition of 367.176 ordinary share units at a price of $0.0000 per share. These were additional restricted stock units credited as dividend equivalents under an existing award and not an open-market purchase or sale.

Why did Colleen Arnold receive 367.176 additional share units in Smurfit Westrock (SW)?

The 367.176 additional restricted stock units accrued as dividend equivalents in connection with a quarterly dividend of $0.4523 per ordinary share. They follow the same terms and conditions as the underlying restricted stock unit award originally granted to Arnold.

How many Smurfit Westrock (SW) shares and units does Colleen Arnold hold after this transaction?

After the transaction, Arnold’s direct holdings increased to 33,596.136 ordinary shares and share-based units. This total includes her existing restricted stock units and deferred share units, plus the 367.176 additional units credited as dividend equivalents.

What portion of Colleen Arnold’s Smurfit Westrock (SW) units is unvested or deferred?

Her holdings include 4,422 restricted stock units scheduled to vest on the earlier of May 2, 2026 or the next annual stockholder meeting, and 27,285.136 fully vested restricted stock units that will be settled after her service on the board ends.

Was Colleen Arnold’s Smurfit Westrock (SW) Form 4 transaction a market buy or sell?

No. The Form 4 reports a grant-type acquisition coded “A,” reflecting dividend-equivalent restricted stock units. It was a compensation-related share unit credit, not an open-market purchase or sale of Smurfit Westrock ordinary shares.

How are Colleen Arnold’s deferred Smurfit Westrock (SW) units settled?

The 27,285.136 fully vested restricted stock units are deferred and will be settled in ordinary shares after Arnold ceases serving on the board. This timing follows the terms of the WestRock Company 2016 Deferred Compensation Plan for Non-Employee Directors.