SW

SEC source: 0001628280-26-042710 · wk-form4_1781279965.xml · nonDerivative · entry 1

WILSON ALAN D · CIK 0001216704 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,906.508

F1 · price: 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 $0.4523 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 4,489 restricted stock units which will vest on the earlier of (i) May 1, 2027 or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders and and 58,391.508 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: 0001628280-26-042709 · wk-form4_1781279954.xml · nonDerivative · entry 1

BERNLOHR TIMOTHY J · CIK 0001286593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,571

F1 · price: 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 $0.4523 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 4,489 restricted stock units which will vest on the earlier of (i) May 1, 2027 or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

SEC source: 0001628280-26-042708 · wk-form4_1781279941.xml · nonDerivative · entry 1

Hietala Kaisa · CIK 0001868531 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,067

F1 · price: 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 $0.4523 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 4,489 restricted stock units which will vest on the earlier of (i) May 1, 2027, or (ii) the date of the next annual meeting of Smurfit Westrock plc's stockholders.

SEC source: 0001628280-26-036205 · wk-form4_1779202856.xml · nonDerivative · entry 1

SMURFIT ANTHONY P J · CIK 0001133264 · Director · President and Group CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,727,203

F1 · price: In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 130,353 restricted stock unit awards. Each restricted stock unit 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: 0001628280-26-036203 · wk-form4_1779202829.xml · nonDerivative · entry 1

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,731

F1 · price: In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 10,638 restricted stock unit awards. Each restricted stock unit 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: 0001628280-26-036204 · wk-form4_1779202844.xml · nonDerivative · entry 1

Garren Ben · CIK 0002030058 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,809

F1 · price: In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 12,981 restricted stock unit awards. Each restricted stock unit 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: 0001628280-26-036206 · wk-form4_1779202867.xml · nonDerivative · entry 1

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,710

F1 · price: In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 5,392 restricted stock unit awards. Each restricted stock unit 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: 0001628280-26-036201 · wk-form4_1779202798.xml · nonDerivative · entry 1

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,491

F1 · price: In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 38,456 restricted stock unit awards. Each restricted stock unit 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: 0001628280-26-036202 · wk-form4_1779202814.xml · nonDerivative · entry 1

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 241,243

F1 · price: In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 32,263 restricted stock unit awards. Each restricted stock unit 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: 0001628280-26-036200 · wk-form4_1779202777.xml · nonDerivative · entry 1

Bowles Ken · CIK 0002026939 · Director · Executive VP and Group CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 173,963

F1 · price: In accordance with the terms of the restricted stock unit award, additional restricted stock units accrued as dividend equivalents based on the Issuer's quarterly dividend of $0.4523 per ordinary share, with such accrual determined as of the dividend record date. 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 38,456 restricted stock unit awards. Each restricted stock unit 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: 0001628280-26-030314 · wk-form4_1777999938.xml · nonDerivative · entry 1

CREWS TERRELL K · CIK 0001126219 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,360

F1 · 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: 0001628280-26-030309 · wk-form4_1777999892.xml · nonDerivative · entry 2

Rasmussen Jorgen Buhl · CIK 0002029266 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,691

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: 0001628280-26-030309 · wk-form4_1777999892.xml · nonDerivative · entry 1

Rasmussen Jorgen Buhl · CIK 0002029266 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,814

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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: 0001628280-26-030315 · wk-form4_1777999949.xml · nonDerivative · entry 2

Fairweather Carol · CIK 0002029261 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,545

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: 0001628280-26-030315 · wk-form4_1777999949.xml · nonDerivative · entry 1

Fairweather Carol · CIK 0002029261 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,668

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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: 0001628280-26-030306 · wk-form4_1777999843.xml · nonDerivative · entry 1

Melgar Lourdes · CIK 0002029405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,107

F1 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting persons tax withholding obligation upon vesting and settlement of their restricted stock units.

SEC source: 0001628280-26-030317 · wk-form4_1777999967.xml · nonDerivative · entry 2

Finan Irial · CIK 0001299112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 58,818

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: 0001628280-26-030317 · wk-form4_1777999967.xml · nonDerivative · entry 1

Finan Irial · CIK 0001299112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,154

F1 · shares: On May 1st, 2026, the Reporting Person was granted 6,974 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: 0001628280-26-030316 · wk-form4_1777999957.xml · nonDerivative · entry 2

FergusonMchugh MaryLynn · CIK 0001613133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,545

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: 0001628280-26-030316 · wk-form4_1777999957.xml · nonDerivative · entry 1

FergusonMchugh MaryLynn · CIK 0001613133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,668

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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: 0001628280-26-030312 · wk-form4_1777999920.xml · nonDerivative · entry 2

BERNLOHR TIMOTHY J · CIK 0001286593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,520

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: 0001628280-26-030312 · wk-form4_1777999920.xml · nonDerivative · entry 1

BERNLOHR TIMOTHY J · CIK 0001286593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,643

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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: 0001628280-26-030313 · wk-form4_1777999929.xml · nonDerivative · entry 2

Brown Carole Lynnette · CIK 0001820224 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,737

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: 0001628280-26-030313 · wk-form4_1777999929.xml · nonDerivative · entry 1

Brown Carole Lynnette · CIK 0001820224 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,860

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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: 0001628280-26-030311 · wk-form4_1777999911.xml · nonDerivative · entry 2

Arnold Colleen F. · CIK 0001409123 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,911.136

F3 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

F2 · balance_after: Includes 27,285.136 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: 0001628280-26-030311 · wk-form4_1777999911.xml · nonDerivative · entry 1

Arnold Colleen F. · CIK 0001409123 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,034.136

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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.

F2 · balance_after: Includes 27,285.136 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: 0001628280-26-030310 · wk-form4_1777999901.xml · nonDerivative · entry 2

WILSON ALAN D · CIK 0001216704 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,185.23

F3 · shares: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the Reporting Person's tax withholding obligation upon vesting and settlement of RSUs.

F2 · balance_after: Includes 57,721.23 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: 0001628280-26-030310 · wk-form4_1777999901.xml · nonDerivative · entry 1

WILSON ALAN D · CIK 0001216704 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,308.23

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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.

F2 · balance_after: Includes 57,721.23 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: 0001628280-26-030307 · wk-form4_1777999857.xml · nonDerivative · entry 2

Harrison Suzan F. · CIK 0001706044 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,955

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: 0001628280-26-030307 · wk-form4_1777999857.xml · nonDerivative · entry 1

Harrison Suzan F. · CIK 0001706044 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,078

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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: 0001628280-26-030308 · wk-form4_1777999876.xml · nonDerivative · entry 2

Hietala Kaisa · CIK 0001868531 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,016

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: 0001628280-26-030308 · wk-form4_1777999876.xml · nonDerivative · entry 1

Hietala Kaisa · CIK 0001868531 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,139

F1 · shares: On May 1st, 2026, the Reporting Person was granted 4,438 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: 0001628280-26-020105 · wk-form4_1774027612.xml · nonDerivative · entry 2

SMURFIT ANTHONY P J · CIK 0001133264 · Director · President and Group CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,726,185

F2 · kind: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting person's tax withholding obligation upon the vesting and settlement of dividend equivalents, which accrued on 18 March 2026. Since these dividend equivalents were associated with restricted stock units that vested and settled on 12 March 2026, the dividend equivalents immediately vested and settled on 19 March 2026 in accordance with the terms of the associated restricted stock unit award.

SEC source: 0001628280-26-020111 · wk-form4_1774027678.xml · nonDerivative · entry 2

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,644

F2 · kind: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting person's tax withholding obligation upon the vesting and settlement of dividend equivalents, which accrued on 18 March 2026. Since these dividend equivalents were associated with restricted stock units that vested and settled on 12 March 2026, the dividend equivalents immediately vested and settled on 19 March 2026 in accordance with the terms of the associated restricted stock unit award.

SEC source: 0001628280-26-020107 · wk-form4_1774027648.xml · nonDerivative · entry 2

Garren Ben · CIK 0002030058 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,717

F2 · kind: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting person's tax withholding obligation upon the vesting and settlement of dividend equivalents, which accrued on 18 March 2026. Since these dividend equivalents were associated with restricted stock units that vested and settled on 12 March 2026, the dividend equivalents immediately vested and settled on 19 March 2026 in accordance with the terms of the associated restricted stock unit award.

SEC source: 0001628280-26-020104 · wk-form4_1774027587.xml · nonDerivative · entry 2

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,672

F2 · kind: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting person's tax withholding obligation upon the vesting and settlement of dividend equivalents, which accrued on 18 March 2026. Since these dividend equivalents were associated with restricted stock units that vested and settled on 12 March 2026, the dividend equivalents immediately vested and settled on 19 March 2026 in accordance with the terms of the associated restricted stock unit award.

SEC source: 0001628280-26-020108 · wk-form4_1774027656.xml · nonDerivative · entry 2

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,188

F2 · kind: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting person's tax withholding obligation upon the vesting and settlement of dividend equivalents, which accrued on 18 March 2026. Since these dividend equivalents were associated with restricted stock units that vested and settled on 12 March 2026, the dividend equivalents immediately vested and settled on 19 March 2026 in accordance with the terms of the associated restricted stock unit award.

SEC source: 0001628280-26-020106 · wk-form4_1774027637.xml · nonDerivative · entry 2

Bowles Ken · CIK 0002026939 · Director · Executive VP and Group CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 173,660

F2 · kind: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting person's tax withholding obligation upon the vesting and settlement of dividend equivalents, which accrued on 18 March 2026. Since these dividend equivalents were associated with restricted stock units that vested and settled on 12 March 2026, the dividend equivalents immediately vested and settled on 19 March 2026 in accordance with the terms of the associated restricted stock unit award.

SEC source: 0001628280-26-020109 · wk-form4_1774027662.xml · nonDerivative · entry 2

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 240,990

F2 · kind: Reflects ordinary shares of Smurfit Westrock plc withheld to satisfy the reporting person's tax withholding obligation upon the vesting and settlement of dividend equivalents, which accrued on 18 March 2026. Since these dividend equivalents were associated with restricted stock units that vested and settled on 12 March 2026, the dividend equivalents immediately vested and settled on 19 March 2026 in accordance with the terms of the associated restricted stock unit award.

SEC source: 0001628280-26-020093 · wk-form4_1774026820.xml · nonDerivative · entry 1

CREWS TERRELL K · CIK 0001126219 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,483

F1 · price: 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 $0.4523 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 4,422 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

SEC source: 0001628280-26-020105 · wk-form4_1774027612.xml · derivative · entry 4

SMURFIT ANTHONY P J · CIK 0001133264 · Director · President and Group CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,969

Underlying: Ordinary Shares · 973 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 $0.4523 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.

F4 · derivative.exercise_date: The 83,969 restricted stock units vest and are due to be settled in February 2027.

F4 · derivative.expiration_date: The 83,969 restricted stock units vest and are due to be settled in February 2027.

SEC source: 0001628280-26-020105 · wk-form4_1774027612.xml · nonDerivative · entry 1

SMURFIT ANTHONY P J · CIK 0001133264 · Director · President and Group CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,726,204

F1 · kind: 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 $0.4523 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.

SEC source: 0001628280-26-020111 · wk-form4_1774027678.xml · derivative · entry 3

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,272

Underlying: Ordinary Shares · 223 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 $0.4523 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.

F3 · derivative.exercise_date: The 19,272 restricted stock units vest and are due to be settled in February 2027.

F3 · derivative.expiration_date: The 19,272 restricted stock units vest and are due to be settled in February 2027.

SEC source: 0001628280-26-020111 · wk-form4_1774027678.xml · nonDerivative · entry 1

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,652

F1 · kind: 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 $0.4523 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.

SEC source: 0001628280-26-020107 · wk-form4_1774027648.xml · nonDerivative · entry 1

Garren Ben · CIK 0002030058 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,726

F1 · kind: 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 $0.4523 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.

SEC source: 0001628280-26-020104 · wk-form4_1774027587.xml · derivative · entry 3

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,046

Underlying: Ordinary Shares · 162 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 $0.4523 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.

F3 · derivative.exercise_date: The 14,046 restricted stock units vest and are due to be settled in February 2027.

F3 · derivative.expiration_date: The 14,046 restricted stock units vest and are due to be settled in February 2027.

SEC source: 0001628280-26-020104 · wk-form4_1774027587.xml · nonDerivative · entry 1

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,679

F1 · kind: 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 $0.4523 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.

SEC source: 0001628280-26-020099 · wk-form4_1774026941.xml · nonDerivative · entry 1

Fairweather Carol · CIK 0002029261 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,230

F1 · price: 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 $0.4523 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 4,422 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.

SEC source: 0001628280-26-020108 · wk-form4_1774027656.xml · derivative · entry 4

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,972

Underlying: Ordinary Shares · 358 shares

Expires not disclosed

F1 · derivative.exercise_price: 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 $0.4523 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.

F3 · derivative.exercise_date: The 30,972 restricted stock units vest and are due to be settled in February 2027.

F3 · derivative.expiration_date: The 30,972 restricted stock units vest and are due to be settled in February 2027.

SEC source: 0001628280-26-020108 · wk-form4_1774027656.xml · nonDerivative · entry 1

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,218

F1 · kind: 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 $0.4523 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.