X0508 4 2024-09-18 0002005951 Smurfit Westrock plc SW 0001614734 STOCKTON DMITRI L 777 LONG RIDGE ROAD SYNCHRONY FINANCIAL C/O CORP. SECRETARY STAMFORD CT 06902 1 0 0 0 0 Ordinary Shares 2024-09-18 4 A 0 68 0 A 11077 D In accordance with the terms of outstanding time-based restricted stock units, 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. Restricted stock units are fully vested and will be settled in ordinary shares following the Reporting Person's cessation of service as a member of the Issuer's board of directors in accordance with the terms of the WestRock Company 2016 Deferred Compensation Plan for Non-Employee Directors. Exhibit 24.1 Power of Attorney /s/ Ciara O'Riordan, attorney-in-fact for Dmitri L. Stockton 2024-09-20