LyondellBasell Industries N.V. (LYB) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-21 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: LyondellBasell Industries N.V. (LYB) CIK: 0001489393 --- Reporting Owner --- Name: Dudley Robert W. CIK: 0001855587 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Ordinary Shares Date: 2026-05-21 | Code: A (Grant or award) Shares: +2,321 | Price: $0.00 Shares Owned After: 10,528 | Ownership: D (Direct) Footnotes: [F1] Includes 5,238 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,917 that vest on May 22, 2026. The 2,321 RSUs reported on this Form 4 vest on May 21, 2027. [Transaction #2] Security: Class A Ordinary Shares Date: 2026-05-22 | Code: F (Payment of exercise/tax) Shares: -708 | Price: $69.72 Total Value: $49,361.76 Shares Owned After: 9,820 | Ownership: D (Direct) Footnotes: [F2] On May 22, 2026 the reporting person's restricted stock units automatically vested 2,917 shares. 708 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. [F3] Includes 2,321 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 21, 2027. --- Footnotes (Complete Index) --- F1: Includes 5,238 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,917 that vest on May 22, 2026. The 2,321 RSUs reported on this Form 4 vest on May 21, 2027. F2: On May 22, 2026 the reporting person's restricted stock units automatically vested 2,917 shares. 708 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. F3: Includes 2,321 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 21, 2027. --- Signature --- /s/ /s/ Lara A. Mason, Attorney-in-Fact (2026-05-26)