Jacques Aigrain - 21 May 2026 Form 4 Insider Report for LyondellBasell Industries N.V. (LYB)

Reporting relationship: Director
Issuer ticker: LYB
Reported as of: 21 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 May 2026, 16:03:40 UTC
Prior SEC filing: 20 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Lara A. Mason, Attorney-in-Fact

Key filing fact

Jacques Aigrain filed Form 4 for LyondellBasell Industries N.V. (LYB) on 26 May 2026.

Key facts

This page summarizes Jacques Aigrain's Form 4 filing for LyondellBasell Industries N.V. (LYB).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 26 May 2026, 16:03.

Change

Previous filing in this sequence was filed on 20 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001094730 Primary reporting owner

AIGRAIN JACQUES

Relationship: Director
Address: 4TH FLOOR, ONE VINE STREET, LONDON, UNITED KINGDOM
Signature: /s/ Lara A. Mason, Attorney-in-Fact
Signature date: 26 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

LYB transaction

Class A Ordinary Shares

Award

Transaction value
Shares: +4,437
Change %: +13%
Price: $0.000000^*
Shares after: 38,109
Date: 21 May 2026
Ownership: Direct
Footnotes: F1

LYB transaction

Class A Ordinary Shares

Tax liability

Transaction value
Shares: -575
Change %: -1.5%
Price: $69.72^*
Shares after: 37,534
Date: 22 May 2026
Ownership: Direct
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote 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.

Footnote 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.

Footnote F3

Includes 4,437 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 21, 2027.