James Malcolm Seward - 15 Oct 2025 Form 4 Insider Report for LyondellBasell Industries N.V. (LYB)

Role: EVP & Chief Innovation Officer
Signature: /s/ Lara A. Mason, Attorney-in-Fact
Issuer symbol: LYB
Transactions as of: 15 Oct 2025
Transactions value $: -$3,928
Form type: 4
Filing time: 17 Oct 2025, 16:43:58 UTC
Previous filing: 03 Mar 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Seward James Malcolm	EVP & Chief Innovation Officer	4TH FLOOR, ONE VINE STREET, LONDON, UNITED KINGDOM	/s/ Lara A. Mason, Attorney-in-Fact	17 Oct 2025	0001783902

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	LYB	Class A Ordinary Shares	Tax liability	-$3,927	-84	-0.23%	$46.76	35,803	15 Oct 2025	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	On October 15, 2025 the reporting person's restricted stock units automatically vested 168 shares. 84 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.
F2	Includes 12,329 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,639 granted on February 23, 2023 that vest on February 23, 2026; 5,088 granted on February 22, 2024 of which 1,696 vested on February 22, 2025, 1,696 vest on February 22, 2026; 1,696 vest on February 22, 2027 and 6,298 granted on February 27, 2025 of which 2,100 vest on February 27, 2026, 2,099 vest on February 27, 2027 and 2,099 vest on February 27, 2028.

Content

On October 15, 2025 the reporting person's restricted stock units automatically vested 168 shares. 84 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

Includes 12,329 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,639 granted on February 23, 2023 that vest on February 23, 2026; 5,088 granted on February 22, 2024 of which 1,696 vested on February 22, 2025, 1,696 vest on February 22, 2026; 1,696 vest on February 22, 2027 and 6,298 granted on February 27, 2025 of which 2,100 vest on February 27, 2026, 2,099 vest on February 27, 2027 and 2,099 vest on February 27, 2028.