X0306 4 2019-12-31 true 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 2019-12-31 4 F false 839.00 94.48 D 38016.00 D Class A Ordinary Shares 2019-12-31 4 F false 2389.00 94.48 D 35627.00 D Class A Ordinary Shares 2019-12-31 4 F false 1375.00 94.48 D 34252.00 D Class A Ordinary Shares 2019-12-31 4 D false 4841.00 0.00 D 29411.00 D Class A Ordinary Shares 2019-12-31 4 D false 173.00 0.00 D 29238.00 D Class A Ordinary Shares 2019-12-31 4 D false 1973.00 0.00 D 27265.00 D Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 2,131 shares of restricted stock units granted to the reporting person on February 21, 2019. Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 6,071 shares of restricted stock units granted to the reporting person on February 16, 2017. Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 3,492 shares of restricted stock units granted to the reporting person on February 21, 2018. The reporting person's employment with the company ended on December 31, 2019 due to retirement and, pursuant to the terms of his restricted stock unit award, forfeited the 4,841 shares reported on this Form 4. Price is not applicable. The reporting person's employment with the company ended on December 31, 2019 due to retirement and, pursuant to the terms of his restricted stock unit award, forfeited the 173 shares reported on this Form 4. The reporting person's employment with the company ended on December 31, 2019 due to retirement and, pursuant to the terms of his restricted stock unit award, forfeited the 1,973 shares reported on this Form 4. /s/ N. Elizabeth Campell, Attorney-in-Fact 2020-01-03