SW

SEC source: 0001628280-26-020101 · wk-form4_1774027006.xml · nonDerivative · entry 1

Melgar Lourdes · CIK 0002029405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,230

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: 0001628280-26-020100 · wk-form4_1774026957.xml · nonDerivative · entry 1

Rasmussen Jorgen Buhl · CIK 0002029266 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,376

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: 0001628280-26-020106 · wk-form4_1774027637.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,280

Underlying: Ordinary Shares · 489 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 42,280 restricted stock units vest and are due to be settled in February 2027.

F3 · derivative.expiration_date: The 42,280 restricted stock units vest and are due to be settled in February 2027.

SEC source: 0001628280-26-020106 · wk-form4_1774027637.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: 173,699

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: 0001628280-26-020109 · wk-form4_1774027662.xml · derivative · entry 3

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,219

Underlying: Ordinary Shares · 431 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 37,219 restricted stock units vest and are due to be settled in February 2027

F3 · derivative.expiration_date: The 37,219 restricted stock units vest and are due to be settled in February 2027

SEC source: 0001628280-26-020109 · wk-form4_1774027662.xml · nonDerivative · entry 1

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 241,018

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: 0001628280-26-020103 · wk-form4_1774027062.xml · nonDerivative · entry 1

Finan Irial · CIK 0001299112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,180

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 6,949 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: 0001628280-26-020102 · wk-form4_1774027031.xml · nonDerivative · entry 1

Hietala Kaisa · CIK 0001868531 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,701

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: 0001628280-26-020098 · wk-form4_1774026926.xml · nonDerivative · entry 1

FergusonMchugh MaryLynn · CIK 0001613133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,230

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: 0001628280-26-020097 · wk-form4_1774026908.xml · nonDerivative · entry 1

Arnold Colleen F. · CIK 0001409123 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,596.136

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 and 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: 0001628280-26-020096 · wk-form4_1774026889.xml · nonDerivative · entry 1

Harrison Suzan F. · CIK 0001706044 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,640

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: 0001628280-26-020095 · wk-form4_1774026871.xml · nonDerivative · entry 1

Brown Carole Lynnette · CIK 0001820224 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,422

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: 0001628280-26-020091 · wk-form4_1774026754.xml · nonDerivative · entry 1

BERNLOHR TIMOTHY J · CIK 0001286593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,205

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: 0001628280-26-020094 · wk-form4_1774026853.xml · nonDerivative · entry 1

WILSON ALAN D · CIK 0001216704 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,870.23

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 and 57,721.230 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: 0001628280-26-017586 · wk-form4_1773420389.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: 1,725,424

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

SEC source: 0001628280-26-017588 · wk-form4_1773420407.xml · nonDerivative · entry 2

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,595

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

SEC source: 0001628280-26-017590 · wk-form4_1773420432.xml · nonDerivative · entry 2

Garren Ben · CIK 0002030058 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,636

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

SEC source: 0001628280-26-017584 · wk-form4_1773420367.xml · nonDerivative · entry 2

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,642

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

SEC source: 0001628280-26-017587 · wk-form4_1773420397.xml · nonDerivative · entry 2

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 240,828

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

SEC source: 0001628280-26-017585 · wk-form4_1773420379.xml · nonDerivative · entry 2

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,993

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

SEC source: 0001628280-26-017589 · wk-form4_1773420422.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: 173,474

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

SEC source: 0001628280-26-017586 · wk-form4_1773420389.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: 1,727,029

F1 · kind: On March 11, 2026, the reporting person was granted 84,419 restricted stock units. Each restricted stock unit represents a contingent right to receive one ordinary share. The restricted stock units are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001628280-26-017588 · wk-form4_1773420407.xml · nonDerivative · entry 1

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,236

F1 · kind: On March 11, 2026, the Reporting Person was granted 7,257 restricted stock units. Each restricted stock unit represents a contingent right to receive one ordinary share. The restricted stock units are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001628280-26-017590 · wk-form4_1773420432.xml · nonDerivative · entry 1

Garren Ben · CIK 0002030058 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,394

F1 · kind: On March 11, 2026, the reporting person was granted 7,701 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: 0001628280-26-017584 · wk-form4_1773420367.xml · nonDerivative · entry 1

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,198

F1 · kind: On March 11, 2026, the Reporting Person was granted 3,199 restricted stock units (RSUs). Each restricted stock unit represents a contingent right to receive one ordinary share. The restricted stock units are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001628280-26-017587 · wk-form4_1773420397.xml · nonDerivative · entry 1

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 243,161

F1 · kind: On March 11, 2026, the Reporting Person was granted 21,031 restricted stock units. Each restricted stock unit represents a contingent right to receive one ordinary share. The restricted stock units are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001628280-26-017585 · wk-form4_1773420379.xml · nonDerivative · entry 1

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,517

F1 · kind: On March 11, 2026, the Reporting Person was granted 25,178 restricted stock units. Each restricted stock unit represents a contingent right to receive one ordinary share. The restricted stock units are scheduled to vest in three equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001628280-26-017589 · wk-form4_1773420422.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: 176,822

F1 · kind: On March 11, 2026, the Reporting Person was granted 25,178 restricted stock units. 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: 0001628280-26-010081 · wk-form4_1771607254.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: 1,642,610

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $51.48 to $51.61. 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: 0001628280-26-010082 · wk-form4_1771607266.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: 151,644

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $51.25 to $51.27. 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: 0001628280-26-010083 · wk-form4_1771607274.xml · nonDerivative · entry 2

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 115,339

F1 · price: The shares were sold on the London Stock Exchange and the price of GBP36.99 was converted to USD using the closing European Central Bank Rate on 18 February 2026.

SEC source: 0001628280-26-010083 · wk-form4_1771607274.xml · nonDerivative · entry 1

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,216

SEC source: 0001628280-26-008415 · wk-form4_1771350291.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,996

Underlying: Ordinary Shares · 100,484 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.

F5 · derivative.exercise_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 22 September 2023 and performance share plan awards granted on 22 September 2023.

F5 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 22 September 2023 and performance share plan awards granted on 22 September 2023.

SEC source: 0001628280-26-008415 · wk-form4_1771350291.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,050

Underlying: Ordinary Shares · 23,049 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.

F5 · derivative.exercise_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 22 September 2023 and performance share plan awards granted on 22 September 2023.

F5 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 22 September 2023 and performance share plan awards granted on 22 September 2023.

SEC source: 0001628280-26-008415 · wk-form4_1771350291.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,682,610

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: 0001628280-26-008415 · wk-form4_1771350291.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: 1,693,670

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: 0001628280-26-008415 · wk-form4_1771350291.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: 1,670,621

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: 0001628280-26-008420 · wk-form4_1771350329.xml · derivative · entry 5

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,810

Underlying: Ordinary Shares · 4,789 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 2023 and performance share plan awards granted on 28 March 2023.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2023 and performance share plan awards granted on 28 March 2023.

SEC source: 0001628280-26-008420 · wk-form4_1771350329.xml · derivative · entry 4

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,049

Underlying: Ordinary Shares · 18,207 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 2023 and performance share plan awards granted on 28 March 2023.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 28 March 2023 and performance share plan awards granted on 28 March 2023.

SEC source: 0001628280-26-008420 · wk-form4_1771350329.xml · nonDerivative · entry 3

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,979

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: 0001628280-26-008420 · wk-form4_1771350329.xml · nonDerivative · entry 2

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,239

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: 0001628280-26-008420 · wk-form4_1771350329.xml · nonDerivative · entry 1

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,450

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: 0001628280-26-008417 · wk-form4_1771350309.xml · derivative · entry 5

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,805

Underlying: Ordinary Shares · 5,301 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 22 September 2023 and performance share plan awards granted on 22 September 2023.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 22 September 2023 and performance share plan awards granted on 22 September 2023.

SEC source: 0001628280-26-008417 · wk-form4_1771350309.xml · derivative · entry 4

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,884

Underlying: Ordinary Shares · 16,808 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 22 September 2023 and performance share plan awards granted on 22 September 2023.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 22 September 2023 and performance share plan awards granted on 22 September 2023.

SEC source: 0001628280-26-008417 · wk-form4_1771350309.xml · nonDerivative · entry 3

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,999

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: 0001628280-26-008417 · wk-form4_1771350309.xml · nonDerivative · entry 2

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,541

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: 0001628280-26-008417 · wk-form4_1771350309.xml · nonDerivative · entry 1

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,240

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: 0001628280-26-008419 · wk-form4_1771350322.xml · derivative · entry 6

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,999

Underlying: Ordinary Shares · 9,806 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 22 September 2023 and performance share plan awards granted on 22 September 2023.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 22 September 2023 and performance share plan awards granted on 22 September 2023.

SEC source: 0001628280-26-008419 · wk-form4_1771350322.xml · derivative · entry 5

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,614

Underlying: Ordinary Shares · 37,885 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 22 September 2023 and performance share plan awards granted on 22 September 2023.

F4 · derivative.expiration_date: Reflects the vesting and settlement of deferred bonus plan awards granted on 22 September 2023 and performance share plan awards granted on 22 September 2023.

SEC source: 0001628280-26-008419 · wk-form4_1771350322.xml · nonDerivative · entry 3

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,901

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.