X0306 4 2021-02-21 false 0001489393 LyondellBasell Industries N.V. LYB 0001783902 Seward James Malcolm 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false SVP, R&D, Tech & Sustain. Class A Ordinary Shares 2021-02-21 4 F false 234.00 100.22 D 13087.00 D Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting 472 shares of restricted stock units granted to the reporting person on February 21, 2018. Includes 3,799 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022 and 1,198 granted on February 20, 2020 that vest on February 20, 2023. /s/ Lara A. Mason, Attorney-in-Fact 2021-02-22