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Each restricted stock unit represents the right to receive one ordinary share."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"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."}],"balance_after":49243,"source":{"system":"sec-edgar","filing":"0001628280-25-058153","document":"wk-form4_1766163227.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053658/000162828025058153/wk-form4_1766163227.xml","form_type":"4"}},{"id":1034904,"issuer":{"id":3199,"kind":"organization","name":"Smurfit Westrock plc","symbol":"SW"},"owners":[{"id":22385,"kind":"person","name":"Henao Alvaro","position":1,"cik":"0002053658","reported_name":"Henao Alvaro","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Restricted Stock Units (PSP)","published_at":"2025-09-22T13:22:38.000Z","date":"2025-09-18","kind":"grant","planned":false,"acquired":true,"shares":354,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"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."}],"balance_after":36846,"derivative":{"underlying":"Ordinary Shares","underlying_shares":354},"source":{"system":"sec-edgar","filing":"0001104659-25-091924","document":"tm2526572-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2053658/000110465925091924/tm2526572-4_4seq1.xml","form_type":"4"}},{"id":1034903,"issuer":{"id":3199,"kind":"organization","name":"Smurfit Westrock plc","symbol":"SW"},"owners":[{"id":22385,"kind":"person","name":"Henao Alvaro","position":1,"cik":"0002053658","reported_name":"Henao Alvaro","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See remarks"}}],"security":"Ordinary Shares","published_at":"2025-09-22T13:22:38.000Z","date":"2025-09-18","kind":"grant","planned":false,"acquired":true,"shares":46,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"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."}],"balance_after":49190,"source":{"system":"sec-edgar","filing":"0001104659-25-091924","document":"tm2526572-4_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053658/000110465925091924/tm2526572-4_4seq1.xml","form_type":"4"}},{"id":1104111,"issuer":{"id":3199,"kind":"organization","name":"Smurfit Westrock plc","symbol":"SW"},"owners":[{"id":22385,"kind":"person","name":"Henao Alvaro","position":1,"cik":"0002053658","reported_name":"Henao Alvaro","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"see remarks"}}],"security":"Restricted Stock Units (PSP)","published_at":"2025-06-23T18:45:34.000Z","date":"2025-06-18","kind":"grant","planned":false,"acquired":true,"shares":366,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The 36,492 restricted stock units vest and are settled as follows:(i) 17,834 restricted stock units in February 2026, (ii) and 18,658 restricted stock units in February 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The 36,492 restricted stock units vest and are settled as follows:(i) 17,834 restricted stock units in February 2026, (ii) and 18,658 restricted stock units in February 2027."}],"balance_after":36492,"derivative":{"underlying":"Ordinary Shares","underlying_shares":366},"source":{"system":"sec-edgar","filing":"0001062993-25-012021","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2053658/000106299325012021/form4.xml","form_type":"4"}},{"id":1104110,"issuer":{"id":3199,"kind":"organization","name":"Smurfit Westrock plc","symbol":"SW"},"owners":[{"id":22385,"kind":"person","name":"Henao Alvaro","position":1,"cik":"0002053658","reported_name":"Henao Alvaro","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"see remarks"}}],"security":"Ordinary Shares","published_at":"2025-06-23T18:45:34.000Z","date":"2025-06-18","kind":"grant","planned":false,"acquired":true,"shares":48,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 4,783 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."}],"balance_after":49144,"source":{"system":"sec-edgar","filing":"0001062993-25-012021","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053658/000106299325012021/form4.xml","form_type":"4"}},{"id":1195945,"issuer":{"id":3199,"kind":"organization","name":"Smurfit Westrock plc","symbol":"SW"},"owners":[{"id":22385,"kind":"person","name":"Henao Alvaro","position":1,"cik":"0002053658","reported_name":"Henao Alvaro","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Restricted Stock Units (PSP)","published_at":"2025-03-20T22:09:14.000Z","date":"2025-03-18","kind":"grant","planned":false,"acquired":true,"shares":341,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The 36,126 restricted stock units vest and are settled as follows: (i) 17,655 restricted stock units in February 2026 and (ii) 18,471 restricted stock units in February 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The 36,126 restricted stock units vest and are settled as follows: (i) 17,655 restricted stock units in February 2026 and (ii) 18,471 restricted stock units in February 2027."}],"balance_after":36126,"derivative":{"underlying":"Ordinary Shares","underlying_shares":341},"source":{"system":"sec-edgar","filing":"0001104659-25-026266","document":"tm259928-6_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053658/000110465925026266/tm259928-6_4seq1.xml","form_type":"4"}},{"id":1208131,"issuer":{"id":3199,"kind":"organization","name":"Smurfit Westrock plc","symbol":"SW"},"owners":[{"id":22385,"kind":"person","name":"Henao Alvaro","position":1,"cik":"0002053658","reported_name":"Henao Alvaro","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2025-03-13T20:11:28.000Z","date":"2025-03-11","kind":"grant","planned":false,"acquired":true,"shares":4735,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 11, 2025, the reporting person was granted 4,735 restricted stock units (RSUs). Each RSU represents a contingent right to receive one Ordinary Share. 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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."}],"balance_after":55449,"source":{"system":"sec-edgar","filing":"0001062993-25-002727","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2053658/000106299325002727/form4.xml","form_type":"4"}},{"id":1264414,"issuer":{"id":3199,"kind":"organization","name":"Smurfit Westrock plc","symbol":"SW"},"owners":[{"id":22385,"kind":"person","name":"Henao Alvaro","position":1,"cik":"0002053658","reported_name":"Henao Alvaro","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Ordinary Shares","published_at":"2025-02-18T22:53:16.000Z","date":"2025-02-14","kind":"exercise","planned":false,"acquired":true,"shares":14149,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the acquisition of common stock upon vesting and settlement of performance share plan awards. 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