Smurfit Westrock (SW)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-01 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Smurfit Westrock plc (SW) CIK: 0002005951 --- Reporting Owner --- Name: WILSON ALAN D CIK: 0001216704 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Ordinary Shares Date: 2026-05-01 | Code: A (Grant or award) Shares: +4,438 | Price: $0.00 Shares Owned After: 68,308.23 | Ownership: D (Direct) Footnotes: [F1] 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. [F2] Includes 57,721.23 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. [Transaction #2] Security: Ordinary Shares Date: 2026-05-01 | Code: F (Payment of exercise/tax) Shares: -2,123 | Price: $38.39 Total Value: $81,501.97 Shares Owned After: 66,185.23 | Ownership: D (Direct) Footnotes: [F3] Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs. [F2] Includes 57,721.23 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. --- Footnotes (Complete Index) --- F1: 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. F2: Includes 57,721.23 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. F3: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs. --- Signature --- /s/ /s/ Ciara O'Riordan, attorney-in-fact-pursuant for Alan D. Wilson (2026-05-05)