X0508 4 2026-02-22 false 0001489393 LyondellBasell Industries N.V. LYB 0002062500 Hayes Matthew D 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false SVP & CAO false Class A Ordinary Shares 2026-02-22 4 F false 71.00 56.67 D 5052.1796 D Class A Ordinary Shares 2026-02-23 4 F false 124.00 56.66 D 4928.1796 D On February 22, 2026 the reporting person's restricted stock units automatically vested 237 shares. 71 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 2,683 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 417 granted on February 23, 2023 that vest on February 23, 2026; 237 granted on February 22, 2024 that vest on February 22, 2027; 307 granted on February 27, 2025 that vest on February 27, 2026; 623 granted on October 15, 2024 that vest on October 15, 2026; 305 granted on February 27, 2025 that vest on February 27, 2027; 305 granted on February 27, 2025 that vest on February 27, 2028 and 489 granted on April 15, 2025 of which 163 vest on April 15, 2026, 163 vest on April 15, 2027 and 163 vest on April 15, 2028. On February 23, 2026 the reporting person's restricted stock units automatically vested 417 shares. 124 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 2,266 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 237 granted on February 22, 2024 that vest on February 22, 2027; 307 granted on February 27, 2025 that vest on February 27, 2026; 623 granted on October 15, 2024 that vest on October 15, 2026; 305 granted on February 27, 2025 that vest on February 27, 2027; 305 granted on February 27, 2025 that vest on February 27, 2028 and 489 granted on April 15, 2025 of which 163 vest on April 15, 2026, 163 vest on April 15, 2027 and 163 vest on April 15, 2028. /s/ Lara A. Mason, Attorney-in-Fact 2026-02-24