X0508 4 2025-10-15 false 0001489393 LyondellBasell Industries N.V. LYB 0001697503 Friedrichs Dale D 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false EVP, Ops Excellence, HSE false Class A Ordinary Shares 2025-10-15 4 F false 74.00 46.76 D 47530.00 D On October 15, 2025 the reporting person's restricted stock units automatically vested 188 shares. 74 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 18,441 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 4,296 granted on February 23, 2023 that vest on February 23, 2026; 7,285 granted on February 22, 2024 of which 2,429 vested on February 22, 2025, 2,428 vest on February 22, 2026; 2,428 vest on February 22, 2027 and 9,289 granted on February 27, 2025 of which 3,097 vest on February 27, 2026, 3,096 vest on February 27, 2027 and 3,096 vest on February 27, 2028. /s/ Lara A. Mason, Attorney-in-Fact 2025-10-17