LyondellBasell withholds 152 Hayes shares for taxes

Hayes’s reported direct holdings included 5,205 restricted stock units granted under the issuer’s long-term incentive plan.

Rhea-AI Filing Summary

LyondellBasell Industries N.V. reported that SVP & CAO Matthew D. Hayes disposed of 152 Class A ordinary shares through tax withholding at 62.67 per share on October 15, 2026. The issuer withheld the shares to satisfy its tax withholding obligations as 623 restricted stock units automatically vested. Hayes’s reported direct holdings after the transaction were 8,970 shares, including 5,205 restricted stock units granted under the issuer’s long-term incentive plan.

Insider Trade Summary

Tax Withholding: 152 shares

Tax Withholding 1 txn

Insider Hayes Matthew D

Role SVP & CAO

Type	Security	Shares	Price	Value
Tax Withholding	Class A Ordinary Shares F1, F2, F3	152	$62.67	$10K

Holdings After Transaction: Class A Ordinary Shares — 8,970.0043 shares (Direct)

Footnotes (3)

1. F1. On October 15, 2026 the reporting person's restricted stock units automatically vested 623 shares. 152 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.
2. F2. Includes 5,205 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 237 granted on February 22, 2024 that vest on February 22, 2027; 305 granted on February 27, 2025 that vest on February 27, 2027; 305 granted on February 27, 2025 that vest on February 27, 2028; 163 granted on April 15, 2025 that vest on April 15, 2027; 163 granted on April 15, 2025 that vest on April 15, 2028; 1,344 granted on February 28, 2026 that vest on February 28, 2027, 1,344 granted on February 28, 2026 that vest on February 28, 2028 and 1,344 granted on February 28, 2026 that vest on February 28, 2029.
3. F3. ESPP purchase of 151.703071 shares for $47.385 per share were allocated on June 30, 2026.

Key Figures

Shares withheld: 152 shares Price per share: 62.67 per share Restricted stock units vested: 623 shares +2 more

5 metrics

Shares withheld 152 shares Tax withholding on October 15, 2026

Price per share 62.67 per share Shares withheld on October 15, 2026

Restricted stock units vested 623 shares Automatically vested on October 15, 2026

Direct holdings after transaction 8,970 shares Reported following the October 15, 2026 transaction

Restricted stock units included in holdings 5,205 RSUs Granted under the issuer’s long-term incentive plan

Key Terms

restricted stock units, tax withholding obligations, long-term incentive plan, ESPP

4 terms

restricted stock units financial

"restricted stock units automatically vested 623 shares"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligations financial

"satisfy the issuer's tax withholding obligations"

long-term incentive plan financial

"granted pursuant to the issuer's long-term incentive plan"

A long-term incentive plan is a company program that pays executives or employees with stock, options, or cash tied to multi-year performance goals, where the rewards become theirs only after meeting conditions over time. Think of it as a delayed bonus or retirement-style reward that aligns employees’ interests with shareholders by encouraging them to boost long-term value; investors watch these plans because they affect pay costs, share dilution and management incentives.

ESPP financial

"ESPP purchase of 151.703071 shares"

An Employee Stock Purchase Plan (ESPP) is a company program that lets employees buy the company’s shares at a reduced price, usually by setting aside a small portion of their pay over time. It matters to investors because it encourages employees to own part of the business—like giving staff a discounted membership— which can boost commitment and performance, while also potentially increasing the number of shares available and affecting shareholder value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many LYB shares were withheld from Matthew D. Hayes?

Matthew D. Hayes, LyondellBasell’s SVP & CAO, had 152 Class A ordinary shares withheld at 62.67 per share on October 15, 2026, to satisfy the issuer’s tax withholding obligations as 623 restricted stock units automatically vested.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/16/2026 - 04:03 PM EDT Accepted by SEC EDGAR 10/16/2026 - 04:02 PM EDT Learn about SEC filing dates

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^*

Hayes Matthew D

(Last) (First) (Middle)

4TH FLOOR

ONE VINE STREET

(Street)

LONDON UNITED KINGDOM W1J 0AH

(City) (State) (Zip)

UNITED KINGDOM

(Country)

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)
	SVP & CAO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/15/2026

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price
Class A Ordinary Shares	10/15/2026		F		152(1)	D	$62.67	8,970.0043(2)(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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. On October 15, 2026 the reporting person's restricted stock units automatically vested 623 shares. 152 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

2. Includes 5,205 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 237 granted on February 22, 2024 that vest on February 22, 2027; 305 granted on February 27, 2025 that vest on February 27, 2027; 305 granted on February 27, 2025 that vest on February 27, 2028; 163 granted on April 15, 2025 that vest on April 15, 2027; 163 granted on April 15, 2025 that vest on April 15, 2028; 1,344 granted on February 28, 2026 that vest on February 28, 2027, 1,344 granted on February 28, 2026 that vest on February 28, 2028 and 1,344 granted on February 28, 2026 that vest on February 28, 2029.

3. ESPP purchase of 151.703071 shares for $47.385 per share were allocated on June 30, 2026.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	10/16/2026
	** 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.
* Form 4: SEC 1474 (03-26)