[Form 4] Smurfit Westrock plc Insider Trading Activity

Rhea-AI Filing Summary

Smurfit Westrock plc director Carole Lynnette Brown reported routine equity compensation activity involving restricted stock units (RSUs). On May 1, 2026, she was granted 4,438 RSUs, each representing a contingent right to receive one ordinary share, scheduled to vest on the earlier of the first anniversary of grant or the next annual stockholder meeting.

In connection with RSU vesting and settlement, 2,123 ordinary shares were withheld to satisfy her tax withholding obligation, a non-market disposition. Following these transactions, she holds 8,860 ordinary shares directly. These events reflect compensation and tax mechanics rather than open-market buying or selling.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Brown Carole Lynnette

Role null

Type	Security	Shares	Price	Value
Grant/Award	Ordinary Shares	4,438	$0.00	--
Tax Withholding	Ordinary Shares	2,123	$38.39	$82K

Holdings After Transaction: Ordinary Shares — 8,860 shares (Direct, null)

Footnotes (1)

1. On May 1st, 2026, the Reporting Person was granted 4,438 restricted stock units (RSUs). Each RSU represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest on the earlier of (i) the first anniversary of the date of grant of the RSU or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders. Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

Key Figures

RSUs granted: 4,438 RSUs Shares withheld for taxes: 2,123 shares at $38.39 Shares held after transactions: 8,860 ordinary shares

3 metrics

RSUs granted 4,438 RSUs Granted on May 1, 2026 to director Brown

Shares withheld for taxes 2,123 shares at $38.39 Ordinary shares withheld to satisfy tax obligation

Shares held after transactions 8,860 ordinary shares Direct ownership after RSU grant and tax withholding

Key Terms

restricted stock units (RSUs), vest, tax withholding obligation

3 terms

restricted stock units (RSUs) financial

"the Reporting Person was granted 4,438 restricted stock units (RSUs). Each RSU represents a contingent right"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

vest financial

"The RSUs are scheduled to vest on the earlier of (i) the first anniversary"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

tax withholding obligation financial

"withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement"

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^*

Brown Carole Lynnette

(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)
05/01/2026

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	05/01/2026		A		4,438(1)	A	$0	8,860	D
Ordinary Shares	05/01/2026		F		2,123(2)	D	$38.39	6,737	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. On May 1st, 2026, the Reporting Person was granted 4,438 restricted stock units (RSUs). Each RSU represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest on the earlier of (i) the first anniversary of the date of grant of the RSU or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

2. Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

Remarks:

	/s/ Ciara O'Riordan, attorney-in-fact-pursuant for Carole Lynnette Brown	05/05/2026
	** 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)