X0306 4 2021-02-21 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 SVP, Human Res & Global Proj Class A Ordinary Shares 2021-02-21 4 F false 482.00 100.22 D 9171.00 D Class A Ordinary Shares 2021-02-21 4 F false 146.00 100.22 D 9025.00 D Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting 1,834 shares of restricted stock units granted to the reporting person on February 21, 2018. Includes 3,820 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 596 granted on February 21, 2018 that vest on February 21, 2021; 848 granted on February 21, 2019 that vest on February 21, 2022 and 2,376 granted on February 20, 2020 that vest on February 20, 2023. Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting 596 shares of restricted stock units granted to the reporting person on February 21, 2018. Includes 3,224 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 848 granted on February 21, 2019 that vest on February 21, 2022 and 2,376 granted on February 20, 2020 that vest on February 20, 2023. /s/ Lara A. Mason, Attorney-in-Fact 2021-02-22