X0609 4 2026-03-31 false 0001489393 LyondellBasell Industries N.V. LYB 0001797157 Karlin Bridget E true 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM true false false false false Class A Ordinary Shares 2026-03-31 4 A false 708.00 0.00 A 5016.00 D Class A Ordinary Shares 2026-03-31 4 F false 111.00 80.56 D 4905.00 D Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which is paid in quarterly installments. The number of shares issued was calculated based on $59.31, which is the average of the daily closing prices of the issuer's shares over the applicable quarter. Includes 2,917 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 22, 2026. /s/ Lara A. Mason, Attorney-in-Fact 2026-04-02