=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-05-13
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: LyondellBasell Industries N.V. (LYB)
CIK: 0001489393
--- Reporting Owner ---
Name: Kaplan Jeffrey A
CIK: 0001634184
Role: Officer (EVP, Chief PC, Leg & Corp Ofc)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Class A Ordinary Shares
Date: 2026-05-13 | Code: S (Open market sale)
Shares: -10,000 | Price: $74.16
Total Value: $741,573.00
Shares Owned After: 96,674 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was executed in multiple trades at prices ranging from $74.13 USD to $74.21 USD. The price reported above reflects the weighted-average sale 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.
[F2] Includes 32,627 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 3,218 granted on February 22, 2024 that vest on February 22, 2027; 4,103 granted on February 27, 2025 that vest on February 27, 2027; 4,103 granted on February 27, 2025 that vest on February 27, 2028 and 21,203 granted on February 28, 2026 of which: 7,069 vest on February 28, 2027, 7,067 vest on February 28, 2028 and 7,067 vest on February 28, 2029.
--- Footnotes (Complete Index) ---
F1: This transaction was executed in multiple trades at prices ranging from $74.13 USD to $74.21 USD. The price reported above reflects the weighted-average sale 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.
F2: Includes 32,627 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 3,218 granted on February 22, 2024 that vest on February 22, 2027; 4,103 granted on February 27, 2025 that vest on February 27, 2027; 4,103 granted on February 27, 2025 that vest on February 27, 2028 and 21,203 granted on February 28, 2026 of which: 7,069 vest on February 28, 2027, 7,067 vest on February 28, 2028 and 7,067 vest on February 28, 2029.
--- Signature ---
/s/ /s/ Lara A. Mason, Attorney-in-Fact (2026-05-15)
