X0306 4 2020-04-06 false 0001489393 LyondellBasell Industries N.V. LYB 0001500293 Patel Bhavesh V. 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM true true false false Chief Executive Officer Class A Ordinary Shares 2020-04-06 4 P false 4654.00 49.35 A 207375.00 I By Family Trust Class A Ordinary Shares 165389.00 D Represents shares purchased by the reporting person's family trust on April 6, 2020 which purchase was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in March 2020. This transaction was executed in multiple trades at prices ranging from $48.33 to $50.25. The price reported above reflects the weighted-average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. Represents shares held by the reporting person's family trust. Includes 97,284 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 27,071 granted on February 21, 2018 that vest on February 21, 2021; 34,782 granted on February 21, 2019 that vest on February 21, 2022 and 35,431 granted on February 20, 2020 that vest on February 20, 2023. /s/ Lara A. Mason, Attorney-in-Fact 2020-04-07