X0306 4 2018-11-30 false 0001489393 LyondellBasell Industries N.V. LYB 0001277260 GWIN ROBERT G 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM true false false false Class A Ordinary Shares 2018-11-30 4 F false 464.00 93.31 D 21471.00 D On November 30, 2018 the reporting person's restricted stock units vested 2,765 shares, upon accelerated vesting, pursuant to the terms of the award agreement. 464 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. /s/ Lara A. Mason, Attorney-in-Fact 2018-12-04