X0306 4 2018-12-31 false 0001489393 LyondellBasell Industries N.V. LYB 0001760238 Hanley Michael Sean 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM true false false false Class A Ordinary Shares 2018-12-31 4 A false 68.00 0.00 A 982.00 D Upon his appointment, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.48, which is the average of the daily closing prices of the issuer's shares over the applicable quarter. Incudes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 914 granted on November 30, 2018 that vest on November 30, 2019. /s/ Lara A. Mason, Attorney-in-Fact 2019-01-03