X0306 4 2021-09-30 false 0001489393 LyondellBasell Industries N.V. LYB 0001335032 Cooper Stephen Forbes 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM true false false false Class A Ordinary Shares 2021-09-30 4 A false 321.00 0.00 A 20325.00 D Class A Ordinary Shares 16389.00 I By Spouse Prior to the beginning of the year, 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 $98.21, which is the average of the daily closing prices of the issuer's shares over the applicable quarter. Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 1,531 granted on May 27, 2021 that vest May 27, 2022. The reporting person disclaims beneficial ownership of the shares held by his spouse, and this report should not be deemed an admission that the reporting person is the beneficial owner of his spouse's shares for purposes of Section 16 or any other purpose. /s/ Lara A. Mason, Attorney-in-Fact 2021-10-01