How does this LYB Form 4 affect Trisha Conley’s share ownership?

Following the 15,068-share grant, her direct ownership after that transaction is reported at 33,766 Class A ordinary shares. After the separate tax-withholding disposition of 711 shares, a subsequent line shows 18,698 shares, reflecting a different point in time relative to the award grant.

LyondellBasell (LYB) EVP gets 15,068-share grant, withholds 711 for taxes

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

LyondellBasell Industries N.V. executive Trisha L. Conley reported two equity-related transactions. On February 28, 2026, she acquired 15,068 Class A ordinary shares at a price of $0.00 per share as a grant or award, bringing her direct holdings after that transaction to 33,766 shares. On February 27, 2026, 711 Class A ordinary shares were disposed of at $57.52 per share to cover tax withholding obligations when 2,917 restricted stock units vested. The filing notes that her holdings include restricted stock units granted under the company’s long-term incentive plan, with portions scheduled to vest between 2027 and 2029.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Conley Trisha L

Role EVP, People and Culture

Type	Security	Shares	Price	Value
Grant/Award	Class A Ordinary Shares	15,068	$0.00	--
Tax Withholding	Class A Ordinary Shares	711	$57.52	$41K

Holdings After Transaction: Class A Ordinary Shares — 33,766 shares (Direct)

Footnotes (1)

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. 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. 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.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 03/03/2026 - 04:37 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Conley Trisha L

(Last)

(First)

(Middle)

4TH FLOOR

ONE VINE STREET

(Street)

LONDON

W1J 0AH

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
LyondellBasell Industries N.V. [ LYB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	EVP, People and Culture

3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Ordinary Shares	02/27/2026		F		711⁽¹⁾	D	$57.52	18,698⁽²⁾	D
Class A Ordinary Shares	02/28/2026		A		15,068	A	$0.00	33,766⁽³⁾	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. 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.

2. 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.

3. 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.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	03/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did LYB executive Trisha Conley report?

Trisha L. Conley reported acquiring 15,068 Class A ordinary shares as a grant at $0.00 per share and disposing of 711 shares at $57.52 per share to satisfy tax withholding tied to vested restricted stock units under LyondellBasell’s long-term incentive plan.

How many LyondellBasell shares did Trisha Conley acquire in the latest Form 4?

She acquired 15,068 Class A ordinary shares through a grant or award transaction. These shares were reported at a price of $0.00 per share and increased her direct share ownership, as recorded after the acquisition, to a total of 33,766 Class A ordinary shares.

Why were 711 LYB shares disposed of in Trisha Conley’s Form 4 filing?

The 711 Class A ordinary shares were withheld to cover the issuer’s tax withholding obligations when 2,917 restricted stock units vested on February 27, 2026. This disposition is categorized as payment of tax liability by delivering securities rather than an open-market sale.

What restricted stock units are included in Trisha Conley’s LYB holdings?

Her reported holdings include restricted stock units granted under LyondellBasell’s long-term incentive plan. These RSUs include prior grants from February 2024 and February 2025 and 15,068 additional RSUs that vest in tranches scheduled for February 2027, February 2028, and February 2029.

What do the tax-withholding transactions mean for LYB investors?

The 711-share tax-withholding disposition reflects standard handling of equity compensation taxes rather than an open-market sale. Such transactions typically occur automatically when restricted stock units vest and do not represent a discretionary decision to sell shares for investment reasons.