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: AIGRAIN JACQUES CIK: 0001094730 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Ordinary Shares Date: 2026-05-21 | Code: A (Grant or award) Shares: +4,437 | Price: $0.00 Shares Owned After: 38,109 | Ownership: D (Direct) Footnotes: [F1] Includes 10,014 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 5,577 that vest on May 22, 2026. The 4,437 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: -575 | Price: $69.72 Total Value: $40,089.00 Shares Owned After: 37,534 | Ownership: D (Direct) Footnotes: [F2] On May 22, 2026 the reporting person's restricted stock units automatically vested 5,577 shares. 575 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. [F3] Includes 4,437 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 10,014 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 5,577 that vest on May 22, 2026. The 4,437 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 5,577 shares. 575 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. F3: Includes 4,437 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)