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The 17,247 RSUs reported on this Form 4 vest as follows: 5,749 vest on February 28, 2027, 5,749 vest on February 28, 2028 and 5,749 vest on February 28, 2029."}],"balance_after":31713.5326,"source":{"system":"sec-edgar","filing":"0002012815-26-000006","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281526000006/primarydocument.xml","form_type":"4"}},{"id":868630,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2026-03-03T16:37:50.000Z","date":"2026-02-27","kind":"tax_withholding","planned":false,"acquired":false,"shares":609,"price":57.52,"value":35029.68,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 27, 2026 the reporting person's restricted stock units automatically vested 2,497 shares. 609 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 6,226 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028."}],"balance_after":14466.5326,"source":{"system":"sec-edgar","filing":"0002012815-26-000006","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281526000006/primarydocument.xml","form_type":"4"}},{"id":885387,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2026-02-24T16:31:21.000Z","date":"2026-02-23","kind":"tax_withholding","planned":false,"acquired":false,"shares":354,"price":56.66,"value":20057.64,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On February 23, 2026 the reporting person's restricted stock units automatically vested 1,453 shares. 354 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 8,723 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 27, 2026; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028."}],"balance_after":15075.5326,"source":{"system":"sec-edgar","filing":"0002012815-26-000004","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281526000004/primarydocument.xml","form_type":"4"}},{"id":885386,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2026-02-24T16:31:21.000Z","date":"2026-02-22","kind":"tax_withholding","planned":false,"acquired":false,"shares":333,"price":56.67,"value":18871.11,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 22, 2026 the reporting person's restricted stock units automatically vested 1,232 shares. 333 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 10,176 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 1,453 granted on February 23, 2023 that vest on February 23, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 27, 2026; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028."}],"balance_after":15429.5326,"source":{"system":"sec-edgar","filing":"0002012815-26-000004","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281526000004/primarydocument.xml","form_type":"4"}},{"id":890985,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2026-02-20T17:20:24.000Z","date":"2026-02-18","kind":"grant","planned":false,"acquired":true,"shares":263,"price":55.97,"value":14720.11,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"Represents shares from the settlement of dividend equivalents that accrued on the performance-based stock units prior to vesting and granted to the Reporting Person on February 23, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 11,408 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 1,453 granted on February 23, 2023 that vest on February 23, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 27, 2026; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028."}],"balance_after":15762.5326,"source":{"system":"sec-edgar","filing":"0002012815-26-000002","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281526000002/primarydocument.xml","form_type":"4"}},{"id":890984,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2026-02-20T17:20:24.000Z","date":"2026-02-18","kind":"grant","planned":false,"acquired":true,"shares":727,"price":55.97,"value":40690.19,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"Represents shares earned in connection with the performance-based stock units previously granted and unreportable on February 23, 2023 pursuant to the issuer's long-term incentive plan. Shares were earned based upon the level of attainment of certain performance objectives and continued employment. These shares fully vested on February 18, 2026 following certification by the Issuer's Compensation & Talent Development Committee."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 11,408 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 1,453 granted on February 23, 2023 that vest on February 23, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 27, 2026; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028."}],"balance_after":15499.5326,"source":{"system":"sec-edgar","filing":"0002012815-26-000002","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281526000002/primarydocument.xml","form_type":"4"}},{"id":890983,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2026-02-20T17:20:24.000Z","date":"2026-02-18","kind":"tax_withholding","planned":false,"acquired":false,"shares":216,"price":55.97,"value":12089.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents shares required to satisfy tax withholding obligations in connection with the vesting of 727 shares of performance-based stock units granted to the Reporting Person on February 23, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 11,408 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 1,453 granted on February 23, 2023 that vest on February 23, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 27, 2026; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028."}],"balance_after":14772.5326,"source":{"system":"sec-edgar","filing":"0002012815-26-000002","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281526000002/primarydocument.xml","form_type":"4"}},{"id":890982,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2026-02-20T17:20:24.000Z","date":"2026-02-18","kind":"tax_withholding","planned":false,"acquired":false,"shares":78,"price":55.97,"value":4365.66,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares required to satisfy tax withholding obligations for dividend equivalents accrued of 263 shares in connection with performance-based stock units granted to the Reporting Person on February 23, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 11,408 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 1,453 granted on February 23, 2023 that vest on February 23, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2026; 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 27, 2026; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028."}],"balance_after":14988.5326,"source":{"system":"sec-edgar","filing":"0002012815-26-000002","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281526000002/primarydocument.xml","form_type":"4"}},{"id":967903,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2025-12-16T17:04:22.000Z","date":"2025-12-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":50,"price":43.34,"value":2167.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting 202 shares of restricted stock units granted to the reporting person on December 15, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 11,408 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 1,453 granted on February 23, 2023 that vest on February 23, 2026; 3,698 granted on February 22, 2024 of which 1,234 vested on February 22, 2025, 1,232 vest on February 22, 2026; 1,232 vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 27, 2026; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Employee Stock Purchase Plan purchase of 16.69334 shares for $63.36 per share were allocated on March 31, 2025."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Employee Stock Purchase Plan purchase of 131.839306 shares for $52.07 per share were allocated on June 30, 2025."}],"balance_after":15066.5326,"source":{"system":"sec-edgar","filing":"0002012815-25-000004","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000201281525000004/primarydocument.xml","form_type":"4"}},{"id":1236289,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2025-03-03T16:41:41.000Z","date":"2025-02-27","kind":"grant","planned":false,"acquired":true,"shares":7491,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes 11,610 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 202 granted on December 15, 2022 that vest on December 15, 2025; 1,453 granted on February 23, 2023 that vest on February 23, 2026 and 3,698 granted on February 22, 2024 of which 1,234 vested on February 22, 2025, 1,232 vest on February 22, 2026 and 1,232 vest on February 22, 2027.  The 7,491 RSUs reported on this Form 4 vest as follows: 2,497 vest on February 27, 2026, 2,497 vest on February 26, 2027 and 2,497 vest on February 26, 2028."}],"balance_after":14968,"source":{"system":"sec-edgar","filing":"0001562180-25-001859","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000156218025001859/primarydocument.xml","form_type":"4"}},{"id":1238856,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2025-02-28T16:07:09.000Z","date":"2025-02-26","kind":"grant","planned":false,"acquired":true,"shares":245,"price":76.2,"value":18669.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F9","text":"Represents shares from the settlement of dividend equivalents that accrued on the performance-based stock units prior to vesting and granted to the Reporting Person on February 24, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 4,119 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 202 granted on December 15, 2022 that vest on December 15, 2025; 1,453 granted on February 23, 2023 that vest on February 23, 2026 and 3,698 granted on February 22, 2024 of which 1,234 vested on February 22, 2025, 1,232 vest on February 22, 2026 and 1,232 vest on February 22, 2027."}],"balance_after":7477,"source":{"system":"sec-edgar","filing":"0001562180-25-001794","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000156218025001794/primarydocument.xml","form_type":"4"}},{"id":1238855,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2025-02-28T16:07:09.000Z","date":"2025-02-26","kind":"grant","planned":false,"acquired":true,"shares":46,"price":76.2,"value":3505.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F8","text":"Represents shares from the settlement of dividend equivalents that accrued on the performance-based stock units prior to vesting and granted to the Reporting Person on December 15, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 4,119 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 202 granted on December 15, 2022 that vest on December 15, 2025; 1,453 granted on February 23, 2023 that vest on February 23, 2026 and 3,698 granted on February 22, 2024 of which 1,234 vested on February 22, 2025, 1,232 vest on February 22, 2026 and 1,232 vest on February 22, 2027."}],"balance_after":7232,"source":{"system":"sec-edgar","filing":"0001562180-25-001794","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000156218025001794/primarydocument.xml","form_type":"4"}},{"id":1238854,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2025-02-28T16:07:09.000Z","date":"2025-02-26","kind":"grant","planned":false,"acquired":true,"shares":319,"price":76.2,"value":24307.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F7","text":"Represents shares earned in connection with the performance-based stock units previously granted and unreportable on December 15, 2022 pursuant to the issuer's long-term incentive plan. Shares were earned based upon the level of attainment of certain performance objectives and continued employment. These shares fully vested on February 26, 2025 following certification by the Issuer's Compensation & Talent Development Committee."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 4,119 restricted stock units (\"RSUs\") granted pursuant to the issuer's long-term incentive plan: 202 granted on December 15, 2022 that vest on December 15, 2025; 1,453 granted on February 23, 2023 that vest on February 23, 2026 and 3,698 granted on February 22, 2024 of which 1,234 vested on February 22, 2025, 1,232 vest on February 22, 2026 and 1,232 vest on February 22, 2027."}],"balance_after":7186,"source":{"system":"sec-edgar","filing":"0001562180-25-001794","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/2012815/000156218025001794/primarydocument.xml","form_type":"4"}},{"id":1238853,"issuer":{"id":3246,"kind":"organization","name":"LyondellBasell Industries N.V."},"owners":[{"id":63412,"kind":"person","name":"Ledet Aaron J","position":1,"cik":"0002012815","reported_name":"Ledet Aaron J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, I&D & Supply Chain"}}],"security":"Class A Ordinary Shares","published_at":"2025-02-28T16:07:09.000Z","date":"2025-02-26","kind":"grant","planned":false,"acquired":true,"shares":901,"price":76.2,"value":68656.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"Represents shares earned in connection with the performance-based stock units previously granted and unreportable on February 24, 2022 pursuant to the issuer's long-term incentive plan. Shares were earned based upon the level of attainment of certain performance objectives and continued employment. 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