X0306 4 2021-02-25 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 2021-02-25 4 A false 4967.00 0.00 A 43386.00 D Stock Options (Right to Buy) 104.41 2021-02-25 4 A false 25948.00 0.00 A 2031-02-25 Class A Ordinary Shares 25948.00 25948.00 D Includes 14,075 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 4,306 granted on February 21, 2019 that vest on February 21, 2022 and 4,802 granted on February 20, 2020 that vest on February 20, 2023. The 4,967 RSUs reported on this Form 4 vest on February 25, 2024. Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 8,650 vest February 25, 2022, 8,649 vest February 25, 2023 and 8,649 vest February 25, 2024. /s/ Lara A. Mason, Attorney-in-Fact 2021-03-01