Form 4 for LYB LyondellBasell

Accepted 2026-03-03 00:00:00 ET · period of report 2026-02-27 · accession 0001783902-26-000006 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
	2026-03-03	2026-02-28	LYB	Seward James Malcolm	EVP, Chief Innovation Off	A - Grant	$0.00	+12.2K	45.7K	+36%	$0
	2026-03-03	2026-02-27	LYB	Seward James Malcolm	EVP, Chief Innovation Off	F - Tax	$57.52	-1,040	33.5K	-3%	-$59.8K

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Class A Ordinary Shares	2026-02-28	A	A	12,209	$0.00	45,731	D	—	—	(F3) Includes 18,103 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,696 granted on February 22, 2024 that vest on February 22, 2027; 2,099 granted on February 27, 2025 that vest on February 27, 2027 and 2,099 granted on February 27, 2025 that vest on February 27, 2028. The 12,209 RSUs reported on this Form 4 vest as follows: 4,071 vest on February 28, 2027, 4,069 vest on February 28, 2028 and 4,069 vest on February 28, 2029.
2	Common	Class A Ordinary Shares	2026-02-27	F	D	1,040	$57.52	33,522	D	—	—	(F1) On February 27, 2026 the reporting person's restricted stock units automatically vested 2,100 shares. 1,040 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. (F2) Includes 5,894 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,696 granted on February 22, 2024 that vest on February 22, 2027; 2,099 granted on February 27, 2025 that vest on February 27, 2027 and 2,099 granted on February 27, 2025 that vest on February 27, 2028.