X0306 4 2019-02-21 false 0001489393 LyondellBasell Industries N.V. LYB 0001735999 Smiley Jacinth C 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false Chief Accounting Officer Class A Ordinary Shares 2019-02-21 4 A false 678.00 0.00 A 1611.00 D Stock Options (Right to Buy) 88.50 2019-02-21 4 A false 3716.00 0.00 A 2029-02-21 Class A Ordinary Shares 3716.00 3716.00 D Includes 1,611 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 627 granted on April 2, 2018 that vest on April 2, 2021 and 306 granted on April 2, 2018 that vest on April 2, 2021. The 678 RSUs reported on this Form 4 vest on February 21, 2022. Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 1,240 vest on February 21, 2020, 1,238 vest on February 21, 2021 and 1,238 vest on February 21, 2022. /s/ Lara A. Mason, Attorney-in-Fact 2019-02-25