X0306 4 2021-04-02 true 0001489393 LyondellBasell Industries N.V. LYB 0001735999 Smiley Jacinth C 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false Chief Accounting Officer Class A Ordinary Shares 2021-04-02 4 F false 75.00 105.55 D 7236.00 D Class A Ordinary Shares 2021-04-02 4 F false 153.00 105.55 D 7083.00 D Class A Ordinary Shares 2021-04-02 4 D false 678.00 0.00 D 6405.00 D Class A Ordinary Shares 2021-04-02 4 D false 445.00 0.00 D 5960.00 D Class A Ordinary Shares 2021-04-02 4 D false 2332.00 0.00 D 3628.00 D Class A Ordinary Shares 2021-04-02 4 D false 1008.00 0.00 D 2620.00 D Class A Ordinary Shares 2021-04-02 4 D false 1032.00 0.00 D 1588.00 D Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting of 306 shares of restricted stock units granted to the reporting person on April 2, 2018. Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting of 627 shares of restricted stock units granted to the reporting person on April 2, 2018. The reporting person's employment with the company ended on April 3, 2021 and, pursuant to the terms of her restricted stock unit award, forfeited the 678 shares reported on this Form 4. Price is not applicable. The reporting person's employment with the company ended on April 3, 2021 and, pursuant to the terms of her restricted stock unit award, forfeited the 445 shares reported on this Form 4. The reporting person's employment with the company ended on April 3, 2021 and, pursuant to the terms of her restricted stock unit award, forfeited the 2,332 shares reported on this Form 4. The reporting person's employment with the company ended on April 3, 2021 and, pursuant to the terms of her restricted stock unit award, forfeited the 1,008 shares reported on this Form 4. The reporting person's employment with the company ended on April 3, 2021 and, pursuant to the terms of her restricted stock unit award, forfeited the 1,032 shares reported on this Form 4. /s/ Lara A. Mason, Attorney-in-Fact 2021-04-06