X0306 4 2019-01-01 false 0001489393 LyondellBasell Industries N.V. LYB 0001662213 Aebischer Thomas 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false EVP & CFO Class A Ordinary Shares 2019-01-01 4 F false 919.00 83.16 D 26561.00 D Includes 18,687 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 6,978 granted on February 16, 2016 that vest on February 16, 2019, 6,244 granted on February 16, 2017 that vest on February 16, 2020, and 5,465 granted on February 21, 2018 that vest on February 21, 2021. /s/ Lara A. Mason, Attorney-in-Fact 2019-01-03