X0306 4 2018-02-21 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 Vice President, HSE Class A Ordinary Shares 2018-02-21 4 F false 308.00 109.09 D 1791.00 D Class A Ordinary Shares 2018-02-21 4 A false 1834.00 0.00 A 3625.00 D Class A Ordinary Shares 2018-02-21 4 A false 596.00 0.00 A 4221.00 D Class A Ordinary Shares 2018-02-21 4 A false 1101.00 109.09 A 5322.00 D Stock Options (Right to Buy) 109.09 2018-02-21 4 A false 3007.00 0.00 A 2028-02-21 Class A Ordinary Shares 3007.00 3007.00 D Represents shares required to satisfy tax withholding obligations in connection with the vesting of 1,101 shares of performance-based stock granted to the Reporting Person on February 17, 2015. Includes 3,098 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 668 granted on February 16, 2017 that vest on February 16, 2020 and 1,834 granted on February 21, 2018 that vest on February 21, 2021. The 596 RSUs reported on this Form 4 vest on February 21, 2021. Includes 2,502 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 668 granted on February 16, 2017 that vest on February 16, 2020. The 1,834 RSUs reported on this Form 4 vest on February 21, 2021. Represents shares earned in connection with the performance-based stock previously granted and unreportable on February 17, 2015 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 21, 2018 following certification by the Issuer's compensation committee. Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 1,003 vest on February 21, 2019, 1,002 vest on February 21, 2020 and 1,002 vest on February 21, 2021. /s/ Lara A. Mason, Attorney-in-Fact 2018-02-23