SW

SEC source: 0001104659-25-044979 · tm2514162-10_4seq1.xml · nonDerivative · entry 1

WILSON ALAN D · CIK 0001216704 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,921.824

F1 · shares: On May 2nd, 2025, the Reporting Person was granted 4,239 restricted stock units (RSUs). Each RSU represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest on the earlier of (i) the first anniversary of the date of grant of the RSU or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

F3 · balance_after: Includes 57,042.824 fully vested RSUs that will be settled in ordinary shares following the Reporting Person's cessation of service as a member of Smurfit Westrock plc's board of directors in accordance with the terms of the WestRock Company 2016 Deferred Compensation Plan for Non-Employee Directors.

SEC source: 0001104659-25-044976 · tm2514162-8_4seq1.xml · nonDerivative · entry 2

Finan Irial · CIK 0001299112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,713

F2 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

SEC source: 0001104659-25-044976 · tm2514162-8_4seq1.xml · nonDerivative · entry 1

Finan Irial · CIK 0001299112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,718

F1 · shares: On May 2nd, 2025, the Reporting Person was granted 6,662 restricted stock units (RSUs). Each RSU represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest on the earlier of (i) the first anniversary of the date of grant of the RSU or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

SEC source: 0001104659-25-044974 · tm2514162-7_4seq1.xml · nonDerivative · entry 2

BERNLOHR TIMOTHY J · CIK 0001286593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,022

F2 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

SEC source: 0001104659-25-044974 · tm2514162-7_4seq1.xml · nonDerivative · entry 1

BERNLOHR TIMOTHY J · CIK 0001286593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,662

F1 · shares: On May 2nd, 2025, the Reporting Person was granted 4,239 restricted stock units (RSUs). Each RSU represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest on the earlier of (i) the first anniversary of the date of grant of the RSU or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

SEC source: 0001104659-25-044971 · tm2514162-4_4seq1.xml · nonDerivative · entry 2

FergusonMchugh MaryLynn · CIK 0001613133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,047

F2 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

SEC source: 0001104659-25-044971 · tm2514162-4_4seq1.xml · nonDerivative · entry 1

FergusonMchugh MaryLynn · CIK 0001613133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,687

F1 · shares: On May 2nd, 2025, the Reporting Person was granted 4,239 restricted stock units (RSUs). Each RSU represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest on the earlier of (i) the first anniversary of the date of grant of the RSU or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

SEC source: 0001104659-25-044972 · tm2514162-5_4seq1.xml · nonDerivative · entry 2

Harrison Suzan F. · CIK 0001706044 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,457

F2 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

SEC source: 0001104659-25-044972 · tm2514162-5_4seq1.xml · nonDerivative · entry 1

Harrison Suzan F. · CIK 0001706044 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,097

F1 · shares: On May 2nd, 2025, the Reporting Person was granted 4,239 restricted stock units (RSUs). Each RSU represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest on the earlier of (i) the first anniversary of the date of grant of the RSU or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

SEC source: 0001104659-25-044969 · tm2514162-2_4seq1.xml · nonDerivative · entry 2

Hietala Kaisa · CIK 0001868531 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,518

F2 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

SEC source: 0001104659-25-044969 · tm2514162-2_4seq1.xml · nonDerivative · entry 1

Hietala Kaisa · CIK 0001868531 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,158

F1 · shares: On May 2nd, 2025, the Reporting Person was granted 4,239 restricted stock units (RSUs). Each RSU represents a contingent right to receive one ordinary share. The RSUs are scheduled to vest on the earlier of (i) the first anniversary of the date of grant of the RSU or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

SEC source: 0001104659-25-044968 · tm2514162-1_4seq1.xml · nonDerivative · entry 1

STOCKTON DMITRI L · CIK 0001614734 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,937.697

F1 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of restricted stock units (RSUs).

F2 · balance_after: Reflects 11,937.697 fully vested RSUs that will be settled in ordinary shares following the Reporting Person's cessation of service as a member of Smurfit Westrock plc's board of directors in accordance with the terms of the WestRock Company 2016 Deferred Compensation Plan for Non-Employee Directors.

SEC source: 0001104659-25-026261 · tm259928-1_4seq1.xml · derivative · entry 1

SMURFIT ANTHONY P J · CIK 0001133264 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 177,899

Underlying: Ordinary Shares · 1,683 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · derivative.exercise_date: The 177,899 restricted stock units vest and are settled as follows: (i) 97,427 restricted stock units in February 2026 and (ii) 80,472 restricted stock units in February 2027.

F2 · derivative.expiration_date: The 177,899 restricted stock units vest and are settled as follows: (i) 97,427 restricted stock units in February 2026 and (ii) 80,472 restricted stock units in February 2027.

SEC source: 0001104659-25-026266 · tm259928-6_4seq1.xml · derivative · entry 1

Henao Alvaro · CIK 0002053658 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,126

Underlying: Ordinary Shares · 341 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · derivative.exercise_date: The 36,126 restricted stock units vest and are settled as follows: (i) 17,655 restricted stock units in February 2026 and (ii) 18,471 restricted stock units in February 2027.

F2 · derivative.expiration_date: The 36,126 restricted stock units vest and are settled as follows: (i) 17,655 restricted stock units in February 2026 and (ii) 18,471 restricted stock units in February 2027.

SEC source: 0001104659-25-026268 · tm259928-8_4seq1.xml · derivative · entry 1

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,761

Underlying: Ordinary Shares · 281 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · derivative.exercise_date: The 29,761 restricted stock units vest and are settled as follows: (i) 16,298 restricted stock units in February 2026 and (ii) 13,463 restricted stock units in February 2027.

F2 · derivative.expiration_date: The 29,761 restricted stock units vest and are settled as follows: (i) 16,298 restricted stock units in February 2026 and (ii) 13,463 restricted stock units in February 2027.

SEC source: 0001104659-25-026269 · tm259928-9_4seq1.xml · derivative · entry 1

Sellier Laurent · CIK 0002029274 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,418

Underlying: Ordinary Shares · 628 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · derivative.exercise_date: The 66,418 restricted stock units vest and are settled as follows: (i) 36,734 restricted stock units in February 2026 and (ii) 29,684 restricted stock units in February 2027.

F2 · derivative.expiration_date: The 66,418 restricted stock units vest and are settled as follows: (i) 36,734 restricted stock units in February 2026 and (ii) 29,684 restricted stock units in February 2027.

SEC source: 0001104659-25-026267 · tm259928-7_4seq1.xml · derivative · entry 1

Mayer Saverio · CIK 0002028256 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,855

Underlying: Ordinary Shares · 745 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · derivative.exercise_date: The 78,855 restricted stock units vest and are settled as follows: (i) 43,185 restricted stock units in February 2026 and (ii) 35,670 restricted stock units in February 2027.

F2 · derivative.expiration_date: The 78,855 restricted stock units vest and are settled as follows: (i) 43,185 restricted stock units in February 2026 and (ii) 35,670 restricted stock units in February 2027.

SEC source: 0001104659-25-026265 · tm259928-5_4seq1.xml · derivative · entry 1

Bowles Ken · CIK 0002026939 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,578

Underlying: Ordinary Shares · 847 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · derivative.exercise_date: The 89,578 restricted stock units vest and are settled as follows: (i) 49,058 restricted stock units in February 2026 and (ii) 40,520 restricted stock units in February 2027.

F2 · derivative.expiration_date: The 89,578 restricted stock units vest and are settled as follows: (i) 49,058 restricted stock units in February 2026 and (ii) 40,520 restricted stock units in February 2027.

SEC source: 0001104659-25-026264 · tm259928-4_4seq1.xml · nonDerivative · entry 1

Arnold Colleen F. · CIK 0001409123 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,678.097

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · balance_after: Includes 1,332 restricted stock units which vest on May 1, 2025 and 26,149.097 fully vested restricted stock units that 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.

SEC source: 0001104659-25-026262 · tm259928-2_4seq1.xml · nonDerivative · entry 1

STOCKTON DMITRI L · CIK 0001614734 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,577.697

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · balance_after: Includes 1,332 restricted stock units which vest on May 1, 2025 and 11,245.697 fully vested restricted stock units that 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.

SEC source: 0001104659-25-026263 · tm259928-3_4seq1.xml · nonDerivative · entry 1

WILSON ALAN D · CIK 0001216704 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,682.824

F1 · price: In accordance with the terms of outstanding restricted stock unit awards, 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.

F2 · balance_after: Includes 1,332 restricted stock units which vest on May 1, 2025 and 55,315.824 fully vested restricted stock units that 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.

SEC source: 0001062993-25-005376 · form4.xml · nonDerivative · entry 1

CREWS TERRELL K · CIK 0001126219 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,701

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005367 · form4.xml · nonDerivative · entry 1

SMURFIT ANTHONY P J · CIK 0001133264 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,569,111

F1 · shares: On March 11, 2025, the reporting person was granted 64,566 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001062993-25-005370 · form4.xml · nonDerivative · entry 1

Henao Alvaro · CIK 0002053658 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,096

F1 · shares: On March 11, 2025, the reporting person was granted 4,735 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001062993-25-005372 · form4.xml · nonDerivative · entry 1

Garren Ben · CIK 0002030058 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,461

F1 · shares: On March 11, 2025, the reporting person was granted 7,461 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001062993-25-005371 · form4.xml · nonDerivative · entry 1

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,336

F1 · shares: On March 11, 2025, the reporting person was granted 3,099 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001062993-25-005350 · form4.xml · nonDerivative · entry 1

Fairweather Carol · CIK 0002029261 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,448

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005373 · form4.xml · nonDerivative · entry 1

Sellier Laurent · CIK 0002029274 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,552

F1 · shares: On March 11, 2025, the reporting person was granted 18,652 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001062993-25-005352 · form4.xml · nonDerivative · entry 1

Rasmussen Jorgen Buhl · CIK 0002029266 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,594

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005357 · form4.xml · nonDerivative · entry 1

Melgar Lourdes · CIK 0002029405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,448

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005378 · form4.xml · nonDerivative · entry 1

Mayer Saverio · CIK 0002028256 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 189,245

F1 · shares: On March 11, 2025, the reporting person was granted 15,783 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001062993-25-005368 · form4.xml · nonDerivative · entry 1

Bowles Ken · CIK 0002026939 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,110

F1 · shares: On March 11, 2025, the reporting person was granted 18,652 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001062993-25-005375 · form4.xml · nonDerivative · entry 1

BERNLOHR TIMOTHY J · CIK 0001286593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,423

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005364 · form4.xml · nonDerivative · entry 1

STOCKTON DMITRI L · CIK 0001614734 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,471

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005365 · form4.xml · nonDerivative · entry 1

WILSON ALAN D · CIK 0001216704 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,158

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005362 · form4.xml · nonDerivative · entry 1

Harrison Suzan F. · CIK 0001706044 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,858

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005361 · form4.xml · nonDerivative · entry 1

Arnold Colleen F. · CIK 0001409123 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,430

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005359 · form4.xml · nonDerivative · entry 1

Finan Irial · CIK 0001299112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,056

F1 · shares: On March 11, 2025, the reporting person was granted 2,093 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005355 · form4.xml · nonDerivative · entry 1

Hietala Kaisa · CIK 0001868531 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,919

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-005351 · form4.xml · nonDerivative · entry 1

FergusonMchugh MaryLynn · CIK 0001613133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,448

F1 · shares: On March 11, 2025, the reporting person was granted 1,332 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. The RSUs are scheduled to vest on May 1, 2025.

SEC source: 0001062993-25-003590 · form4.xml · nonDerivative · entry 1

Henao Alvaro · CIK 0002053658 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,361

SEC source: 0001062993-25-003002 · form4.xml · nonDerivative · entry 1

SMURFIT ANTHONY P J · CIK 0001133264 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,504,545

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.01 to $55.05, inclusive. The reporting person undertakes to provide to Smurfit Westrock plc (the Company), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4.

SEC source: 0001062993-25-003003 · form4.xml · nonDerivative · entry 1

Bowles Ken · CIK 0002026939 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,458

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.02 to $55.13, inclusive. The reporting person undertakes to provide to Smurfit Westrock plc (the Company), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4.

SEC source: 0001062993-25-002728 · form4.xml · derivative · entry 5

SMURFIT ANTHONY P J · CIK 0001133264 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,099

Underlying: Ordinary Shares · 17,779 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2022 and performance share plan awards granted on 28 March 2022.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2022 and performance share plan awards granted on 28 March 2022.

SEC source: 0001062993-25-002728 · form4.xml · derivative · entry 4

SMURFIT ANTHONY P J · CIK 0001133264 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 176,216

Underlying: Ordinary Shares · 78,925 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2022 and performance share plan awards granted on 28 March 2022.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2022 and performance share plan awards granted on 28 March 2022.

SEC source: 0001062993-25-002728 · form4.xml · nonDerivative · entry 3

SMURFIT ANTHONY P J · CIK 0001133264 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,582,545

F3 · kind: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting persons tax withholding obligation upon vesting and settlement of deferred bonus plan awards and performance share plan awards.

SEC source: 0001062993-25-002728 · form4.xml · nonDerivative · entry 2

SMURFIT ANTHONY P J · CIK 0001133264 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,590,582

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · kind: Reflects the acquisition of common stock upon vesting and settlement of deferred bonus plan awards. Each deferred bonus plan award represents a right to receive one ordinary share of Smurfit Westrock plc upon vesting and settlement of the applicable award.

SEC source: 0001062993-25-002728 · form4.xml · nonDerivative · entry 1

SMURFIT ANTHONY P J · CIK 0001133264 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,572,803

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Reflects the acquisition of common stock upon vesting and settlement of performance share plan awards. Each performance share plan award represents a right to receive one ordinary share of Smurfit Westrock plc upon vesting and settlement of the applicable award.

SEC source: 0001062993-25-002727 · form4.xml · derivative · entry 5

Henao Alvaro · CIK 0002053658 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,599

Underlying: Ordinary Shares · 4,038 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2022 and performance share plan awards granted on 28 March 2022.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2022 and performance share plan awards granted on 28 March 2022.

SEC source: 0001062993-25-002727 · form4.xml · derivative · entry 4

Henao Alvaro · CIK 0002053658 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,785

Underlying: Ordinary Shares · 14,149 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2022 and performance share plan awards granted on 28 March 2022.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2022 and performance share plan awards granted on 28 March 2022.