X0306 4 2021-02-21 false 0001489393 LyondellBasell Industries N.V. LYB 0001649570 Guilfoyle James D 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false EVP, Adv Polymer Sol & Sup Chn Class A Ordinary Shares 2021-02-21 4 F false 564.00 100.22 D 26220.65 D Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting 2,308 shares of restricted stock units granted to the reporting person on February 21, 2018. Includes 11,198 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 3,443 granted on February 21, 2019 that vest on February 21, 2022; 3,390 granted on February 21, 2019 that vest on February 21, 2022 and 4,365 granted on February 20, 2020 that vest on February 20, 2023. /s/ Lara A. Mason, Attorney-in-Fact 2021-02-22