X0508 4 2024-09-18 0002005951 Smurfit Westrock plc SW 0002026939 Bowles Ken BEECH HILL CLONSKEAGH DUBLIN 4 L2 D04 N2R2 IRELAND 0 1 0 0 See Remarks 0 Restricted Stock Units (PSP) 2024-09-18 4 A 0 801 0 A Ordinary Shares 801 127726 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 127,726 restricted stock units vest and are settled as follows: (i) 39,510 restricted stock units in February 2025, (ii) 48,312 restricted stock units in February 2026, (iii) and 39,904 restricted stock units in February 2027 Executive Vice President and Group Chief Financial Officer - Exhibit 24.1 Power of Attorney /s/ Ciara O'Riordan, attorney-in-fact for Ken Bowles 2024-09-20