Smurfit Westrock (SW)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-14 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Smurfit Westrock plc (SW) CIK: 0002005951 --- Reporting Owner --- Name: SMURFIT ANTHONY P J CIK: 0001133264 Role: Director, Officer (President and Group CEO) --- Non-Derivative Transactions --- [Transaction #1] Security: Ordinary Shares Date: 2026-08-14 | Code: A (Grant or award) Shares: +784 | Price: $0.00 Shares Owned After: 1,728,508 | Ownership: D (Direct) Footnotes: [F1] In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 131,658 restricted stock unit awards. Each restricted stock unit represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date. --- Holdings --- [Holding #1] Security: Ordinary Shares Ownership: I (Indirect) Footnotes: [F3] These shares are held by the Reporting Person's child who is part of the Reporting Person's household. The Reporting Person disclaims ownership of the shares held by this child, and this report is not an admission that the Reporting Person is the beneficial owner of these shares for the purposes of Section 16 or for any other purposes. --- Footnotes (Complete Index) --- F1: In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 131,658 restricted stock unit awards. Each restricted stock unit represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date. F3: These shares are held by the Reporting Person's child who is part of the Reporting Person's household. The Reporting Person disclaims ownership of the shares held by this child, and this report is not an admission that the Reporting Person is the beneficial owner of these shares for the purposes of Section 16 or for any other purposes. --- Signature --- /s/ /s/ Ciara O'Riordan (attorney-in-fact for Anthony Smurfit) (2026-08-18)