X0306 4 2019-01-12 false 0001489393 LyondellBasell Industries N.V. LYB 0001500293 Patel Bhavesh V. 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false Chief Executive Officer Class A Ordinary Shares 2019-01-12 4 F false 7525.00 86.00 D 136242.00 D Class A ordinary shares 130618.00 I By Family Trust Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting 23,638 shares of restricted stock units granted to the reporting person on January 12, 2015. Includes 107,118 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 23,637 granted on January 12, 2015 that vest on January 12, 2020; 26,066 granted on February 16, 2016 that vest on February 16, 2019; 30,344 granted on February 16, 2017 that vest on February 16, 2020 and 27,071 granted on February 21, 2018 that vest on February 21, 2021. Represents shares held by the reporting person's family trust including an additional 68,808 shares transferred to the trust on May 16, 2018. /s/ Lara A. Mason, Attorney-in-Fact 2019-01-14