LyondellBasell (NYSE: LYB) director gets 4,437 RSUs; 575 shares withheld for taxes

Rhea-AI Filing Summary

LyondellBasell Industries N.V. director Jacques Aigrain reported routine equity compensation activity in Class A Ordinary Shares. On May 21, 2026, he acquired 4,437 restricted stock units (RSUs) at $0.00 per share under the company’s long-term incentive plan; these RSUs vest on May 21, 2027.

On May 22, 2026, 5,577 RSUs automatically vested, and 575 shares were withheld by the issuer at $69.72 per share to satisfy tax withholding obligations, which is not an open-market sale. Following these transactions, Aigrain directly owns 37,534 Class A shares and a total of 10,014 RSUs, including 4,437 that vest on May 21, 2027.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider AIGRAIN JACQUES

Role null

Type	Security	Shares	Price	Value
Tax Withholding	Class A Ordinary Shares	575	$69.72	$40K
Grant/Award	Class A Ordinary Shares	4,437	$0.00	--

Holdings After Transaction: Class A Ordinary Shares — 37,534 shares (Direct, null)

Footnotes (1)

1. Includes 10,014 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 5,577 that vest on May 22, 2026. The 4,437 RSUs reported on this Form 4 vest on May 21, 2027. On May 22, 2026 the reporting person's restricted stock units automatically vested 5,577 shares. 575 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 4,437 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 21, 2027.

Key Figures

RSUs granted: 4,437 RSUs RSUs vested: 5,577 RSUs Shares withheld for taxes: 575 shares at $69.72 +3 more

6 metrics

RSUs granted 4,437 RSUs Grant on May 21, 2026; vesting May 21, 2027

RSUs vested 5,577 RSUs Automatically vested on May 22, 2026

Shares withheld for taxes 575 shares at $69.72 Tax withholding on May 22, 2026 RSU vesting

Shares held after transactions 37,534 shares Direct Class A Ordinary Shares following Form 4 transactions

Total RSUs outstanding 10,014 RSUs Includes 5,577 vesting May 22, 2026 and 4,437 vesting May 21, 2027

Grant price per RSU $0.00 per unit RSU grant on May 21, 2026 under long-term incentive plan

Key Terms

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

5 terms

restricted stock units ("RSUs") financial

"Includes 10,014 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

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

"575 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"

Form 4 Insider Transactions: What Each Field Means →

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^*

AIGRAIN JACQUES

(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		4,437	A	$0.00	38,109(1)	D
Class A Ordinary Shares	05/22/2026		F		575(2)	D	$69.72	37,534(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 10,014 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 5,577 that vest on May 22, 2026. The 4,437 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 5,577 shares. 575 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

3. Includes 4,437 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)

FAQ

What did LyondellBasell (LYB) director Jacques Aigrain report on this Form 4?

Jacques Aigrain reported a grant of 4,437 restricted stock units and tax-related share withholding. The filing reflects routine equity compensation activity, including vesting RSUs and shares withheld to cover tax obligations, rather than an open-market purchase or sale.

How many RSUs did Jacques Aigrain receive from LyondellBasell (LYB)?

He received 4,437 restricted stock units on May 21, 2026 at zero cost. These RSUs were granted under LyondellBasell’s long-term incentive plan and are scheduled to vest on May 21, 2027, adding to his existing unvested equity awards.

Why were 575 LyondellBasell (LYB) shares disposed of in this Form 4?

The 575 shares were withheld by LyondellBasell to satisfy tax withholding obligations when RSUs vested. This tax-withholding disposition is coded “F” and is not an open-market sale, but a standard method of covering required taxes on equity compensation.

How many LyondellBasell (LYB) shares does Jacques Aigrain own after these transactions?

After these transactions, Jacques Aigrain directly owns 37,534 Class A Ordinary Shares. In addition, he holds 10,014 restricted stock units, including 4,437 that vest on May 21, 2027, representing future potential shares subject to vesting conditions.

What RSU vesting events are disclosed for LyondellBasell (LYB) director Jacques Aigrain?

The filing states that 5,577 RSUs vested on May 22, 2026, with 575 shares withheld for taxes. It also notes that 4,437 newly granted RSUs vest on May 21, 2027, under LyondellBasell’s long-term incentive plan, pending continued service or other conditions.