Form 4 for LYB LyondellBasell

Accepted 2026-03-03 00:00:00 ET · period of report 2026-02-27 · accession 0001964403-26-000006 · 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	Conley Trisha L	EVP, People, Culture	A - Grant	$0.00	+15.1K	33.8K	+81%	$0
	2026-03-03	2026-02-27	LYB	Conley Trisha L	EVP, People, Culture	F - Tax	$57.52	-711	18.7K	-4%	-$40.9K

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	15,068	$0.00	33,766	D	—	—	(F3) Includes 23,165 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,265 granted on February 22, 2024 that vest on February 22, 2027; 2,916 granted on February 27, 2025 that vest on February 27, 2027 and 2,916 granted on February 27, 2025 that vest on February 27, 2028. The 15,068 RSUs reported on this Form 4 vest as follows: 5,024 vest on February 28, 2027, 5,022 vest on February 28, 2028 and 5,022 vest on February 28, 2029.
2	Common	Class A Ordinary Shares	2026-02-27	F	D	711	$57.52	18,698	D	—	—	(F1) On February 27, 2026 the reporting person's restricted stock units automatically vested 2,917 shares. 711 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. (F2) Includes 8,097 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,265 granted on February 22, 2024 that vest on February 22, 2027; 2,916 granted on February 27, 2025 that vest on February 27, 2027 and 2,916 granted on February 27, 2025 that vest on February 27, 2028.