X0306 4 2021-02-21 false 0001489393 LyondellBasell Industries N.V. LYB 0001634184 Kaplan Jeffrey A 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false EVP & Chief Legal Officer Class A Ordinary Shares 2021-02-21 4 F false 670.00 100.22 D 39227.00 D Class A Ordinary Shares 2021-02-21 4 F false 808.00 100.22 D 38419.00 D Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting 2,751 shares of restricted stock units granted to the reporting person on February 21, 2018. Includes 12,356 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 3,248 granted on February 21, 2018 that vest on February 21, 2021; 4,306 granted on February 21, 2019 that vest on February 21, 2022 and 4,802 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 3,248 shares of restricted stock units granted to the reporting person on February 21, 2018. Includes 9,108 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 4,306 granted on February 21, 2019 that vest on February 21, 2022 and 4,802 granted on February 20, 2020 that vest on February 20, 2023. /s/ Lara A. Mason, Attorney-in-Fact 2021-02-22