X0508 4 2026-02-18 false 0001489393 LyondellBasell Industries N.V. LYB 0001911538 Vanacker Peter Z. E. 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM true true false false Chief Executive Officer false Class A Ordinary Shares 2026-02-18 4 A false 5102.00 55.97 A 165453.00 D Class A Ordinary Shares 2026-02-18 4 F false 3435.00 55.97 D 162018.00 D Class A Ordinary Shares 2026-02-18 4 F false 1448.00 55.97 D 160570.00 D Class A Ordinary Shares 2026-02-18 4 A false 14106.00 55.97 A 174676.00 D 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. Includes 116,241 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 28,211 granted on February 23, 2023 that vest on February 23, 2026; 15,406 granted on February 22, 2024 that vest on February 22, 2026; 15,406 granted on February 22, 2024 that vest on February 22, 2027; 19,074 granted on February 27, 2025 that vest on February 27, 2026; 19,072 granted on February 27, 2025 that vest on February 27, 2027 and 19,072 granted on February 27, 2025 vest on February 27, 2028. Represents shares required to satisfy tax withholding obligations in connection with the vesting of 14,106 shares of performance-based stock units granted to the Reporting Person on February 23, 2023. Represents shares required to satisfy tax withholding obligations for dividend equivalents accrued of 5,102 shares in connection with performance-based stock units granted to the Reporting Person on February 23, 2023. 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. /s/ Lara A. Mason, Attorney-in-Fact 2026-02-20