X0508 4 2024-09-18 0002005951 Smurfit Westrock plc SW 0002029262 Page Irene BEECH HILL CLONSKEAGH DUBLIN 4 L2 D04 N242 IRELAND 0 1 0 0 Chief Accounting Officer 0 Restricted Stock Units (PSP) 2024-09-18 4 A 0 265 0 A Ordinary Shares 265 42380 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 42,380 restricted stock units vest and are settled as follows: (i) 13,070 restricted stock units in February 2025, (ii) 16,051 restricted stock units in February 2026, (iii) and 13,259 restricted stock units in February 2027. Exhibit 24.1 Power of Attorney /s/ Ciara O'Riordan, attorney-in-fact for Irene Page 2024-09-20