X0306 4 2018-02-21 false 0001489393 LyondellBasell Industries N.V. LYB 0001642974 Coombs Daniel M 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false EVP - Global O&P, Proc, Tech Class A Ordinary Shares 2018-02-21 4 F false 759.00 109.09 D 10869.674 D Class A Ordinary Shares 2018-02-21 4 A false 1531.00 0.00 A 12400.674 D Class A Ordinary Shares 2018-02-21 4 A false 4877.00 0.00 A 17277.674 D Class A Ordinary Shares 2018-02-21 4 A false 3088.00 109.09 A 20365.674 D Stock Options (Right to Buy) 109.09 2018-02-21 4 A false 24617.00 0.00 A 2028-02-21 Class A Ordinary Shares 24617.00 24617.00 D Represents shares required to satisfy tax withholding obligations in connection with the vesting of 3,088 shares of performance-based stock granted to the Reporting Person on May 29, 2015. Includes 17,271 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,287 granted on May 29, 2015 that vest on May 29, 2018; 4,235 granted on February 16, 2016 that vest on February 16, 2019; 5,341 granted on February 16, 2017 that vest on February 16, 2020 and 1,531 granted on February 21, 2018 that vest on February 21, 2021. The 4,877 RSUs reported on this Form 4 vest on February 21, 2021. Includes 12,394 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,287 granted on May 29, 2015 that vest on May 29, 2018; 4,235 granted on February 16, 2016 that vest on February 16, 2019; 5,341 granted on February 16, 2017 that vest on February 16, 2020. The 1,531 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 May 29, 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: 8,207 vest on February 21, 2019, 8,205 vest on February 21, 2020 and 8,205 vest on February 21, 2021. /s/ Lara A. Mason, Attorney-in-Fact 2018-02-23