X0306 4 2018-02-21 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 2018-02-21 4 F false 988.00 109.09 D 13643.00 D Class A Ordinary Shares 2018-02-21 4 F false 445.00 109.09 D 13198.00 D Class A Ordinary Shares 2018-02-21 4 A false 3248.00 0.00 A 16446.00 D Class A Ordinary Shares 2018-02-21 4 A false 2751.00 0.00 A 19197.00 D Class A Ordinary Shares 2018-02-21 4 A false 4054.00 109.09 A 23251.00 D Class A Ordinary Shares 2018-02-21 4 A false 1827.00 109.09 A 25078.00 D Stock Options (Right to Buy) 109.09 2018-02-21 4 A false 16396.00 0.00 A 2028-02-21 Class A Ordinary Shares 16396.00 16396.00 D Represents shares required to satisfy tax withholding obligations in connection with the vesting of 4,054 shares of performance-based stock granted to the Reporting Person on February 17, 2015. Includes 13,352 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 761 granted on May 7, 2015 that vest on May 7, 2018; 3,268 granted on February 16, 2016 that vest on February 16, 2019; 3,324 granted on February 16, 2017 that vest on February 16, 2020 and 3,248 granted on February 21, 2018 that vest on February 21, 2021. The 2,751 RSUs reported on this Form 4 vest on February 21, 2021. Represents shares required to satisfy tax withholding obligations in connection with the vesting of 1,827 shares of performance-based stock granted to the Reporting Person on May 7, 2015. 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. Represents shares earned in connection with the performance-based stock previously granted and unreportable on May 7, 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: 5,466 vest on February 21, 2019, 5,465 vest on February 21, 2020 and 5,465 vest on February 21, 2021. /s/ Lara A. Mason, Attorney-in-Fact 2018-02-23