Saverio Mayer - 18 Dec 2025 Form 4 Insider Report for Smurfit Westrock plc (SW)

Signature
/s/ Ciara O'Riordan (attorney-in-fact for Saverio Mayer)
Issuer symbol
SW
Transactions as of
18 Dec 2025
Net transactions value
$0
Form type
4
Filing time
19 Dec 2025, 11:53:25 UTC
Previous filing
22 Sep 2025
Next filing
17 Feb 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Mayer Saverio President and Chief Executive Officer, Europe, MEA and APAC BEECH HILL, CLONSKEAGH, DUBLIN 4, IRELAND /s/ Ciara O'Riordan (attorney-in-fact for Saverio Mayer) 19 Dec 2025 0002028256

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SW Ordinary Shares Award $0 +179 +0.09% $0.000000 189,739 18 Dec 2025 Direct F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction SW Restricted Stock Units (PSP) Award $0 +896 +1.1% $0.000000 81,327 18 Dec 2025 Ordinary Shares 896 Direct F1, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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.
F2 Includes 16,277 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.
F3 The 81,327 restricted stock units vest and are settled as follows:(i) 44,539 restricted stock units in February 2026, (ii) and 36,788 restricted stock units in February 2027.

Remarks:

President and Chief Executive Officer, Europe, MEA and APAC