X0508 4 2025-06-18 0002005951 Smurfit Westrock plc SW 0001126219 CREWS TERRELL K BEECH HILL CLONSKEAGH DUBLIN 4 L2 D04 N2R2 IRELAND 1 0 0 0 0 Ordinary Shares 2025-06-18 4 A 0 43 0 A 32343 D Ordinary Shares 22635 I Shares held in Trust In accordance with the terms of outstanding restricted stock units, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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. Includes 4,282 restricted stock units which will vest on the earlier of (i) May 2, 2026, or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders. /s/ Ciara O'Riordan, attorney-in-fact pursuant for Terrell K. Crews 2025-06-23