SW

SEC source: 0001628280-26-008419 · wk-form4_1771350322.xml · nonDerivative · entry 2

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,827

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: 0001628280-26-008419 · wk-form4_1771350322.xml · nonDerivative · entry 1

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,021

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: 0001628280-26-008418 · wk-form4_1771350315.xml · derivative · entry 5

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,907

Underlying: Ordinary Shares · 12,288 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: 0001628280-26-008418 · wk-form4_1771350315.xml · derivative · entry 4

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,788

Underlying: Ordinary Shares · 44,539 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: 0001628280-26-008418 · wk-form4_1771350315.xml · nonDerivative · entry 3

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 222,130

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: 0001628280-26-008418 · wk-form4_1771350315.xml · nonDerivative · entry 2

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 246,566

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: 0001628280-26-008418 · wk-form4_1771350315.xml · nonDerivative · entry 1

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 234,278

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: 0001628280-26-008416 · wk-form4_1771350301.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,062

Underlying: Ordinary Shares · 14,154 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: 0001628280-26-008416 · wk-form4_1771350301.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,791

Underlying: Ordinary Shares · 50,597 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: 0001628280-26-008416 · wk-form4_1771350301.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 161,644

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: 0001628280-26-008416 · wk-form4_1771350301.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: 195,445

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: 0001628280-26-008416 · wk-form4_1771350301.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: 181,291

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: 0001628280-25-058143 · wk-form4_1766163011.xml · nonDerivative · entry 1

CREWS TERRELL K · CIK 0001126219 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,432

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 $0.4308 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 4,371 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: 0001628280-25-058181 · wk-form4_1766168123.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 183,480

Underlying: Ordinary Shares · 2,023 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 $0.4308 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.

F4 · derivative.exercise_date: The 183,480 restricted stock units vest and are settled as follows:(i) 100,484 restricted stock units in February 2026, (ii) and 82,996 restricted stock units in February 2027.

F4 · derivative.expiration_date: The 183,480 restricted stock units vest and are settled as follows:(i) 100,484 restricted stock units in February 2026, (ii) and 82,996 restricted stock units in February 2027.

SEC source: 0001628280-25-058181 · wk-form4_1766168123.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: 1,570,137

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 $0.4308 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 66,592 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001628280-25-058153 · wk-form4_1766163227.xml · derivative · entry 2

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,256

Underlying: Ordinary Shares · 410 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 $0.4308 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.

F3 · derivative.exercise_date: The 37,256 restricted stock units vest and are settled as follows:(i) 18,207 restricted stock units in February 2026, (ii) and 19,049 restricted stock units in February 2027.

F3 · derivative.expiration_date: The 37,256 restricted stock units vest and are settled as follows:(i) 18,207 restricted stock units in February 2026, (ii) and 19,049 restricted stock units in February 2027.

SEC source: 0001628280-25-058153 · wk-form4_1766163227.xml · nonDerivative · entry 1

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,243

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 $0.4308 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 4,882 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001628280-25-058157 · wk-form4_1766163262.xml · nonDerivative · entry 1

Garren Ben · CIK 0002030058 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,693

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 $0.4308 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 7,693 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001628280-25-058154 · wk-form4_1766163242.xml · derivative · entry 2

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,692

Underlying: Ordinary Shares · 338 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 $0.4308 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.

F3 · derivative.exercise_date: The 30,692 restricted stock units vest and are settled as follows:(i) 16,808 restricted stock units in February 2026, (ii) and 13,884 restricted stock units in February 2027.

F3 · derivative.expiration_date: The 30,692 restricted stock units vest and are settled as follows:(i) 16,808 restricted stock units in February 2026, (ii) and 13,884 restricted stock units in February 2027.

SEC source: 0001628280-25-058154 · wk-form4_1766163242.xml · nonDerivative · entry 1

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,432

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 $0.4308 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 3,195 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001628280-25-058158 · wk-form4_1766163277.xml · nonDerivative · entry 1

Fairweather Carol · CIK 0002029261 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,179

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 $0.4308 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 4,371 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: 0001628280-25-058149 · wk-form4_1766163159.xml · derivative · entry 3

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,499

Underlying: Ordinary Shares · 754 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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.

F3 · derivative.exercise_date: The 68,499 restricted stock units vest and are settled as follows:(i) 37,885 restricted stock units in February 2026, (ii) and 30,614 restricted stock units in February 2027.

F3 · derivative.expiration_date: The 68,499 restricted stock units vest and are settled as follows:(i) 37,885 restricted stock units in February 2026, (ii) and 30,614 restricted stock units in February 2027.

SEC source: 0001628280-25-058149 · wk-form4_1766163159.xml · nonDerivative · entry 1

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,136

F1 · price: In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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 19,236 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001628280-25-058165 · wk-form4_1766163481.xml · nonDerivative · entry 1

Rasmussen Jorgen Buhl · CIK 0002029266 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,325

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 $0.4308 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 4,371 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: 0001628280-25-058151 · wk-form4_1766163202.xml · derivative · entry 2

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,327

Underlying: Ordinary Shares · 896 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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.

F3 · derivative.exercise_date: The 81,327 restricted stock units vest and are settled as follows:(i) 44,539 restricted stock units in February 2026, (ii) and 36,788 restricted stock units in February 2027.

F3 · derivative.expiration_date: The 81,327 restricted stock units vest and are settled as follows:(i) 44,539 restricted stock units in February 2026, (ii) and 36,788 restricted stock units in February 2027.

SEC source: 0001628280-25-058151 · wk-form4_1766163202.xml · nonDerivative · entry 1

Mayer Saverio · CIK 0002028256 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 189,739

F1 · price: In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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 16,277 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001628280-25-058146 · wk-form4_1766163081.xml · nonDerivative · entry 1

Melgar Lourdes · CIK 0002029405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,179

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 $0.4308 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 4,371 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: 0001628280-25-058150 · wk-form4_1766163183.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,388

Underlying: Ordinary Shares · 1,019 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.

F2 · derivative.exercise_date: The 92,388 restricted stock units vest and are settled as follows:(i) 50,597 restricted stock units in February 2026, (ii) and 41,791 restricted stock units in February 2027.

F2 · derivative.expiration_date: The 92,388 restricted stock units vest and are settled as follows:(i) 50,597 restricted stock units in February 2026, (ii) and 41,791 restricted stock units in February 2027.

SEC source: 0001628280-25-058150 · wk-form4_1766163183.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: 130,694

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.

SEC source: 0001628280-25-058168 · wk-form4_1766163536.xml · nonDerivative · entry 1

Brown Carole Lynnette · CIK 0001820224 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,371

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 $0.4308 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 4,371 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: 0001628280-25-058167 · wk-form4_1766163521.xml · nonDerivative · entry 1

Harrison Suzan F. · CIK 0001706044 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,589

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 $0.4308 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 4,371 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: 0001628280-25-058166 · wk-form4_1766163497.xml · nonDerivative · entry 1

FergusonMchugh MaryLynn · CIK 0001613133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,179

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 $0.4308 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 4,371 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: 0001628280-25-058164 · wk-form4_1766163464.xml · nonDerivative · entry 1

Finan Irial · CIK 0001299112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,100

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 $0.4308 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 6,869 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: 0001628280-25-058163 · wk-form4_1766163386.xml · nonDerivative · entry 1

Arnold Colleen F. · CIK 0001409123 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,228.96

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 $0.4308 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 4,371 restricted stock units which are scheduled to 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 26,968.96 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: 0001628280-25-058162 · wk-form4_1766163364.xml · nonDerivative · entry 1

WILSON ALAN D · CIK 0001216704 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,150.366

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 $0.4308 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 4,371 restricted stock units which are scheduled to 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 57,052.366 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: 0001628280-25-058147 · wk-form4_1766163107.xml · nonDerivative · entry 1

Hietala Kaisa · CIK 0001868531 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,650

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 $0.4308 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 4,371 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: 0001628280-25-058145 · wk-form4_1766163061.xml · nonDerivative · entry 1

BERNLOHR TIMOTHY J · CIK 0001286593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,154

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 $0.4308 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 4,371 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: 0001104659-25-091920 · tm2526572-11_4seq1.xml · nonDerivative · entry 1

CREWS TERRELL K · CIK 0001126219 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,384

F1 · price: In accordance with the terms of outstanding restricted stock units, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

F2 · balance_after: Includes 4,323 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: 0001104659-25-091922 · tm2526572-12_4seq1.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 181,457

Underlying: Ordinary Shares · 1,751 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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.

F3 · derivative.exercise_date: The 181,457 restricted stock units vest and are settled as follows:(i) 99,376 restricted stock units in February 2026, (ii) and 82,081 restricted stock units in February 2027.

F3 · derivative.expiration_date: The 181,457 restricted stock units vest and are settled as follows:(i) 99,376 restricted stock units in February 2026, (ii) and 82,081 restricted stock units in February 2027.

SEC source: 0001104659-25-091922 · tm2526572-12_4seq1.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: 1,570,403

F1 · price: In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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 65,858 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001104659-25-091924 · tm2526572-4_4seq1.xml · derivative · entry 2

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,846

Underlying: Ordinary Shares · 354 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of applicable outstanding restricted stock units, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

F3 · derivative.exercise_date: The 36,846 restricted stock units vest and are settled as follows:(i) 18,007 restricted stock units in February 2026, (ii) and 18,839 restricted stock units in February 2027.

F3 · derivative.expiration_date: The 36,846 restricted stock units vest and are settled as follows:(i) 18,007 restricted stock units in February 2026, (ii) and 18,839 restricted stock units in February 2027.

SEC source: 0001104659-25-091924 · tm2526572-4_4seq1.xml · nonDerivative · entry 1

Henao Alvaro · CIK 0002053658 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,190

F1 · price: In accordance with the terms of applicable outstanding restricted stock units, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

F2 · balance_after: Includes 4,829 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001104659-25-091937 · tm2526572-18_4seq1.xml · derivative · entry 3

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,745

Underlying: Ordinary Shares · 653 shares

Expires not disclosed

F1 · derivative.exercise_price: In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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.

F3 · derivative.exercise_date: The 67,745 restricted stock units vest and are settled as follows:(i) 37,468 restricted stock units in February 2026, (ii) and 30,277 restricted stock units in February 2027.

F3 · derivative.expiration_date: The 67,745 restricted stock units vest and are settled as follows:(i) 37,468 restricted stock units in February 2026, (ii) and 30,277 restricted stock units in February 2027.

SEC source: 0001104659-25-091937 · tm2526572-18_4seq1.xml · nonDerivative · entry 1

Sellier Laurent · CIK 0002029274 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,924

F1 · price: In accordance with the terms of the applicable outstanding restricted stock unit award, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 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 19,024 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001104659-25-091926 · tm2526572d5_4seq1.xml · nonDerivative · entry 1

Garren Ben · CIK 0002030058 · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,609

F1 · price: In accordance with the terms of applicable outstanding restricted stock units, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

F2 · balance_after: Includes 7,609 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001104659-25-091931 · tm2526572d8_4seq1.xml · derivative · entry 2

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,354

Underlying: Ordinary Shares · 292 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 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 30,354 restricted stock units vest and are settled as follows:(i) 16,623 restricted stock units in February 2026, (ii) and 13,731 restricted stock units in February 2027.

F3 · derivative.expiration_date: The 30,354 restricted stock units vest and are settled as follows:(i) 16,623 restricted stock units in February 2026, (ii) and 13,731 restricted stock units in February 2027.

SEC source: 0001104659-25-091931 · tm2526572d8_4seq1.xml · nonDerivative · entry 1

Page Irene · CIK 0002029262 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,397

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 same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

F2 · balance_after: Includes 3,160 restricted stock units which are scheduled to vest in three equal annual installments beginning on March 11, 2026, the first anniversary of the grant date.

SEC source: 0001104659-25-091919 · tm2526572-1_4seq1.xml · nonDerivative · entry 1

Fairweather Carol · CIK 0002029261 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,131

F1 · price: In accordance with the terms of outstanding restricted stock units, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

F2 · balance_after: Includes 4,323 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: 0001104659-25-091935 · tm2526572d17_4seq1.xml · nonDerivative · entry 1

Melgar Lourdes · CIK 0002029405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,131

F1 · price: In accordance with the terms of outstanding restricted stock units, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

F2 · balance_after: Includes 4,323 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: 0001104659-25-091933 · tm2526572-9_4seq1.xml · nonDerivative · entry 1

Rasmussen Jorgen Buhl · CIK 0002029266 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,277

F1 · price: In accordance with the terms of outstanding restricted stock units, additional restricted stock units accrued as dividend equivalents in connection with the Issuer's payment of a quarterly dividend of $0.4308 per ordinary share. Such additional restricted stock units are subject to the same terms and conditions as the underlying award. Each restricted stock unit represents the right to receive one ordinary share.

F2 · balance_after: Includes 4,323 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.