X0508 4 2024-12-18 0002005951 Smurfit Westrock plc SW 0002028256 Mayer Saverio BEECH HILL CLONSKEAGH DUBLIN 4 L2 D04N2R2 IRELAND 0 1 0 0 See Remarks 0 Restricted Stock Units (PSP) 2024-12-18 4 A 0 636 0 A Ordinary Shares 636 109594 D In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.3025 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. The 109,594 restricted stock units vest and are settled as follows: (i) 31,484 restricted stock units in February 2025, (ii) 42,777 restricted stock units in February 2026, (iii) and 35,333 restricted stock units in February 2027. President and Chief Executive Officer, Europe, MEA and APAC - /s/ Ciara O'Riordan, attorney-in-fact for Saverio Mayer 2024-12-20