X0306 4 2019-02-20 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 SVP, Global I&D, Supply Chain Class A Ordinary Shares 2019-02-20 4 F false 577.00 89.16 D 11273.00 D Class A Ordinary Shares 2019-02-20 4 A false 2369.00 89.16 A 13642.00 D Represents shares required to satisfy tax withholding obligations in connection with the vesting of 2,369 shares of performance-based stock granted to the Reporting Person on February 16, 2016. Includes 4,434 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,126 granted on February 16, 2017 that vest on February 16, 2020 and 2,308 granted on February 21, 2018 that vest on February 21, 2021. Represents shares earned in connection with the performance-based stock previously granted and unreportable on February 16, 2016 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 20, 2019 following certification by the Issuer's compensation committee. /s/ Lara A. Mason, Attorney-in-Fact 2019-02-22