X0508 4 2026-02-22 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 2026-02-22 4 F false 6063.00 56.67 D 168613.00 D Class A Ordinary Shares 2026-02-23 4 F false 11102.00 56.66 D 157511.00 D On February 22, 2026 the reporting person's restricted stock units automatically vested 15,406 shares. 6,063 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 100,835 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, 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. On February 23, 2026 the reporting person's restricted stock units automatically vested 28,211 shares. 11,102 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 72,624 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 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. /s/ Lara A. Mason, Attorney-in-Fact 2026-02-24