X0508 4 2025-12-15 false 0001489393 LyondellBasell Industries N.V. LYB 0002012815 Ledet Aaron J 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false EVP, I&D & Supply Chain false Class A Ordinary Shares 2025-12-15 4 F false 50.00 43.34 D 15066.5326 D 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. 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. Employee Stock Purchase Plan purchase of 16.69334 shares for $63.36 per share were allocated on March 31, 2025. Employee Stock Purchase Plan purchase of 131.839306 shares for $52.07 per share were allocated on June 30, 2025. /s/ Lara A. Mason, Attorney-in-Fact 2025-12-16