Form 4 for LYB LyondellBasell

Accepted 2026-02-24 00:00:00 ET · period of report 2026-02-22 · accession 0001783902-26-000004 · 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
M	2026-02-24	2026-02-22+	LYB	Seward James Malcolm	EVP, Chief Innovation Off	F - Tax	$56.66	-2,147	34.6K	-6%	-$121.7K

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	2026-02-22	F	D	840	$56.67	35,869	D	—	—	(F1) On February 22, 2026 the reporting person's restricted stock units automatically vested 1,696 shares. 840 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. (F2) Includes 10,633 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; 1,696 granted on February 22, 2024 that vest on February 22, 2027; 2,100 granted on February 27, 2025 that vest on February 27, 2026, 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.
2	Common	Class A Ordinary Shares	2026-02-23	F	D	1,307	$56.66	34,562	D	—	—	(F3) On February 23, 2026 the reporting person's restricted stock units automatically vested 2,639 shares. 1,307 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. (F4) Includes 7,994 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; 2,100 granted on February 27, 2025 that vest on February 27, 2026, 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.