LYB director reports RSU grant and tax withholding

LyondellBasell Industries N.V. director Robin W.T.

Rhea-AI Filing Summary

LyondellBasell Industries N.V. director Robin W.T. Buchanan reported routine equity compensation activity. On May 21, 2026, he received 2,321 Class A Ordinary Shares as a grant under the company’s long-term incentive plan, at no cash cost to him.

On May 22, 2026, 2,917 restricted stock units vested, and 1,247 shares were withheld by the issuer at a price of $69.72 per share to cover tax obligations, rather than being sold on the market. After these transactions, Buchanan directly holds 22,165.345 Class A Ordinary Shares, and the filing notes 2,321 remaining restricted stock units scheduled to vest on May 21, 2027.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Buchanan Robin W.T.

Role Director

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Class A Ordinary Shares	1,247	$69.72	$87K
Grant/Award	Class A Ordinary Shares	2,321	$0.00	$0.00

Holdings After Transaction: Class A Ordinary Shares — 22,165.345 shares (Direct)

Footnotes (3)

1. F1. Includes 5,238 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,917 that vest on May 22, 2026. The 2,321 RSUs reported on this Form 4 vest on May 21, 2027.
2. F2. On May 22, 2026 the reporting person's restricted stock units automatically vested 2,917 shares. 1,247 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.
3. F3. Includes 2,321 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 21, 2027.

Key Figures

RSU grant shares: 2,321 shares Tax-withheld shares: 1,247 shares Withholding price: $69.72 per share +3 more

6 metrics

RSU grant shares 2,321 shares Class A Ordinary Shares granted on May 21, 2026

Tax-withheld shares 1,247 shares Withheld on May 22, 2026 to satisfy tax obligations

Withholding price $69.72 per share Price applied to the 1,247 withheld shares

Shares after transactions 22,165.345 shares Direct Class A Ordinary Shares held following transactions

RSUs vesting 2026 2,917 RSUs Restricted stock units that vested on May 22, 2026

RSUs vesting 2027 2,321 RSUs Restricted stock units vesting on May 21, 2027

Key Terms

restricted stock units, long-term incentive plan, tax withholding obligations, grant, award, or other acquisition, +1 more

5 terms

restricted stock units financial

"Includes 5,238 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan"

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.

long-term incentive plan financial

"restricted stock units ("RSUs") 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.

tax withholding obligations financial

"1,247 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations"

grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

Payment of exercise price or tax liability by delivering securities financial

"transaction_code_description": "Payment of exercise price or tax liability by delivering securities""

FAQ

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

What insider transactions did LYB director Robin Buchanan report on this Form 4?

Robin Buchanan reported a grant of 2,321 Class A Ordinary Shares and a separate tax-withholding disposition of 1,247 shares. The disposition satisfied tax obligations on vested restricted stock units, not an open-market sale, making these routine compensation-related transactions.

How many LYB shares does Robin Buchanan hold after these transactions?

After the reported transactions, Robin Buchanan directly holds 22,165.345 Class A Ordinary Shares. This reflects his position following the equity grant and the issuer’s withholding of 1,247 shares to cover tax obligations on recently vested restricted stock units.

What restricted stock unit (RSU) awards did LYB grant to Robin Buchanan?

Buchanan holds 2,321 restricted stock units granted under LyondellBasell’s long-term incentive plan that vest on May 21, 2027. These RSUs represent additional future share delivery, separate from the 22,165.345 Class A Ordinary Shares he currently holds directly.

Was the 1,247-share disposition by Robin Buchanan a sale of LYB stock?

The 1,247-share disposition was not an open-market sale. The issuer withheld these shares at $69.72 per share to satisfy tax withholding obligations when 2,917 restricted stock units vested on May 22, 2026, a common mechanism for covering equity award taxes.

What LYB equity awards vested for Robin Buchanan on May 22, 2026?

On May 22, 2026, 2,917 of Buchanan’s restricted stock units automatically vested. To cover related tax withholding obligations, LyondellBasell withheld 1,247 of the resulting shares, while the remainder contributed to his direct share ownership position.

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

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Accepted by SEC EDGAR 05/26/2026 - 04:04 PM 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^*

Buchanan Robin W.T.

(Last) (First) (Middle)

4TH FLOOR

ONE VINE STREET

(Street)

LONDON 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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

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	05/21/2026		A		2,321	A	$0.00	23,412.345(1)	D
Class A Ordinary Shares	05/22/2026		F		1,247(2)	D	$69.72	22,165.345(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. Includes 5,238 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,917 that vest on May 22, 2026. The 2,321 RSUs reported on this Form 4 vest on May 21, 2027.

2. On May 22, 2026 the reporting person's restricted stock units automatically vested 2,917 shares. 1,247 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

3. Includes 2,321 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 21, 2027.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	05/26/2026
	** 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)