Smurfit Westrock (SW) awards 21,031 RSUs to executive Saverio Mayer

Rhea-AI Filing Summary

Smurfit Westrock plc executive Saverio Mayer reported routine equity compensation activity. On March 11, 2026, he received a grant of 21,031 restricted stock units, each representing a contingent right to one ordinary share. These RSUs are scheduled to vest in three equal annual installments starting on the first anniversary of the grant date.

On March 12, 2026, 2,333 ordinary shares were withheld to satisfy his tax withholding obligation upon vesting and settlement of restricted stock units, a non-market, tax-related disposition. Following these transactions, Mayer directly holds 240,828 ordinary shares.

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

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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^*

Mayer Saverio

(Last) (First) (Middle)

BEECH HILL, CLONSKEAGH

(Street)

DUBLIN 4 L2 D04 N2R2

(City) (State) (Zip)

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

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See remarks

3. Date of Earliest Transaction (Month/Day/Year)
03/11/2026

4. If Amendment, Date of 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

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	03/11/2026		A(1)		21,031	A	$0	243,161	D
Ordinary Shares	03/12/2026		F(2)		2,333	D	$42.2	240,828	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 March 11, 2026, the Reporting Person was granted 21,031 restricted stock units. Each restricted stock unit represents a contingent right to receive one ordinary share. The restricted stock units are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

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

Remarks:

President and Chief Executive Officer, Europe, MEA and APAC

	/s/ Ciara O'Riordan (attorney-in-fact for Saverio Mayer)	03/13/2026
	** 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.

FAQ

What insider transactions did Smurfit Westrock (SW) report for Saverio Mayer?

Smurfit Westrock reported a grant of 21,031 restricted stock units to Saverio Mayer and a withholding of 2,333 ordinary shares to cover related tax obligations. These are compensation and tax events, not open-market purchases or sales.

How many restricted stock units did Saverio Mayer receive from Smurfit Westrock (SW)?

Saverio Mayer received 21,031 restricted stock units, each tied to one ordinary share. The units vest in three equal annual installments beginning on the first anniversary of the March 11, 2026 grant date, aligning compensation with multi-year service.

How will Saverio Mayer’s Smurfit Westrock (SW) RSUs vest over time?

The 21,031 restricted stock units granted to Saverio Mayer are scheduled to vest in three equal annual installments. Vesting starts on the first anniversary of the March 11, 2026 grant date, creating a three-year vesting schedule tied to continued service.

Why were 2,333 Smurfit Westrock (SW) shares disposed of in this Form 4?

The 2,333 ordinary shares were withheld to satisfy Saverio Mayer’s tax withholding obligation when restricted stock units vested and settled. This tax-withholding disposition is an automatic, non-market event rather than a discretionary sale of shares.

What is Saverio Mayer’s Smurfit Westrock (SW) shareholding after these transactions?

After the reported grant and tax-withholding disposition, Saverio Mayer directly holds 240,828 ordinary shares of Smurfit Westrock plc. This figure reflects his post-transaction position as disclosed in the Form 4 insider filing.

Does this Smurfit Westrock (SW) Form 4 show open-market buying or selling?

No, the Form 4 shows a restricted stock unit grant and shares withheld for taxes, not open-market buying or selling. The acquisition is compensation-related, and the disposition strictly covers tax obligations tied to RSU vesting and settlement.