X0508 4 2026-02-23 false 0001489393 LyondellBasell Industries N.V. LYB 0001948900 Campbell Tracey D 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false EVP, Sustainability & Corp Aff false Class A Ordinary Shares 2026-02-23 4 F false 340.00 56.66 D 13326.36 D Class A Ordinary Shares 5359.09 I By Spouse On February 23, 2026 the reporting person's restricted stock units automatically vested 1,155 shares. 340 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 5,272 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,205 granted on February 22, 2024 of which 735 were deferred on February 22, 2025, 735 were deferred on February 22, 2026; 735 vest on February 22, 2027 and 3,067 granted on February 27, 2025 of which 1,023 vest on February 27, 2026, 1,022 vest on February 27, 2027 and 1,022 vest on February 27, 2028. /s/ Lara A. Mason, Attorney-in-Fact 2026-02-24