X0306 4 2020-02-19 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 Resources Class A Ordinary Shares 2020-02-19 4 A false 668.00 81.95 A 7387.00 D Class A Ordinary Shares 2020-02-19 4 A false 83.00 81.95 A 7470.00 D Class A Ordinary Shares 2020-02-19 4 F false 173.00 81.95 D 7297.00 D Class A Ordinary Shares 2020-02-19 4 F false 20.00 81.95 D 7277.00 D Represents shares earned in connection with the performance-based stock units previously granted and unreportable on February 16, 2017 pursuant to the issuer's long-term incentive plan. Shares were earned based upon the level of attainment of certain performance objectives and continued employment. These shares fully vested on February 19, 2020 following certification by the Issuer's compensation committee. Includes 3,278 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; 1,834 granted on February 21, 2018 that vest on February 21, 2021 and 848 granted on February 21, 2019 that vest on February 21, 2022. Represents shares from the settlement of dividend equivalents that accrued on the performance-based stock units prior to vesting. Represents shares required to satisfy tax withholding obligations in connection with the vesting of 668 shares of performance-based stock units granted to the Reporting Person on February 16, 2017. Represents shares required to satisfy tax withholding obligations in connection with the settlement of dividend equivalents accrued of 83 shares of performance-based stock units granted to the Reporting Person on February 16, 2017. /s/ Lara A. Mason, Attorney-in-Fact 2020-02-21