LyondellBasell (LYB) SVP sees RSUs vest and shares withheld for tax

Rhea-AI Filing Summary

LyondellBasell Industries N.V. senior vice president and chief accounting officer Matthew D. Hayes reported a routine tax-related share disposition. On April 15, 2026, 163 restricted stock units vested, and 40 Class A Ordinary Shares were withheld by the company at $73.13 per share to cover tax obligations.

After this withholding, Hayes directly held about 8,970 Class A Ordinary Shares, along with 5,828 unvested restricted stock units scheduled to vest between 2026 and 2029. The filing also notes a prior ESPP purchase of 142.1216 shares at $38.97 per share on March 31, 2026.

Insights

Equity compensation analyst

Routine RSU vesting with tax withholding; no open-market trading.

Matthew D. Hayes, SVP & CAO of LyondellBasell, reported 40 Class A Ordinary Shares disposed at $73.13 per share to satisfy tax withholding arising from 163 vested restricted stock units on April 15, 2026. This is coded as a tax-withholding disposition, not a market sale.

The transaction is small relative to his position, leaving 8,970.3012 shares directly held plus 5,828 unvested RSUs with vesting dates through 2029. The footnotes also reference a prior ESPP purchase of 142.1216 shares at $38.97 per share, reinforcing that this filing mainly documents normal compensation and tax mechanics.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Hayes Matthew D

Role SVP & CAO

Type	Security	Shares	Price	Value
Tax Withholding	Class A Ordinary Shares	40	$73.13	$3K

Holdings After Transaction: Class A Ordinary Shares — 8,970.301 shares (Direct)

Footnotes (1)

1. On April 15, 2026 the reporting person's restricted stock units automatically vested 163 shares. 40 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 5,828 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; 623 granted on October 15, 2024 that vest on October 15, 2026; 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. ESPP purchase of 142.1216 shares for $38.97 per share were allocated on March 31, 2026.

Key Figures

Tax-withheld shares: 40 shares at $73.13 Shares held after transaction: 8,970.3012 shares RSUs vested: 163 units +2 more

5 metrics

Tax-withheld shares 40 shares at $73.13 Shares withheld to satisfy tax obligations on April 15, 2026

Shares held after transaction 8,970.3012 shares Direct Class A Ordinary Shares following tax withholding

RSUs vested 163 units Restricted stock units that automatically vested on April 15, 2026

Unvested RSUs outstanding 5,828 units RSUs under long-term incentive plan vesting 2026–2029

ESPP purchase 142.1216 shares at $38.97 Employee stock purchase plan allocation on March 31, 2026

Key Terms

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

4 terms

restricted stock units financial

"the reporting person's restricted stock units automatically vested 163 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

"40 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations"

long-term incentive plan financial

"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.

ESPP financial

"ESPP purchase of 142.1216 shares for $38.97 per share"

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.

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^*

Hayes Matthew D

(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)

	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)
04/15/2026

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	04/15/2026		F		40(1)	D	$73.13	8,970.3012(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 April 15, 2026 the reporting person's restricted stock units automatically vested 163 shares. 40 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

2. Includes 5,828 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; 623 granted on October 15, 2024 that vest on October 15, 2026; 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 142.1216 shares for $38.97 per share were allocated on March 31, 2026.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	04/17/2026
	** 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 insider transaction did LYB executive Matthew Hayes report?

Matthew D. Hayes reported a small tax-related share disposition. When 163 restricted stock units vested, 40 Class A Ordinary Shares were withheld by LyondellBasell at $73.13 per share to satisfy tax withholding obligations, rather than being sold on the open market.

Did the LYB SVP & CAO sell shares on the open market?

No, the filing shows a tax-withholding disposition, not an open-market sale. Forty shares were withheld by the issuer to cover tax obligations triggered by the vesting of 163 restricted stock units on April 15, 2026, a standard equity compensation process.

How many LYB shares does Matthew Hayes hold after this transaction?

After the tax withholding, Matthew Hayes directly holds 8,970.3012 Class A Ordinary Shares. In addition, he has 5,828 unvested restricted stock units scheduled to vest on various dates between 2026 and 2029 under LyondellBasell’s long-term incentive plan.

What restricted stock units are outstanding for the LYB SVP & CAO?

The filing lists 5,828 restricted stock units outstanding for Matthew Hayes. These RSUs come from multiple grants between 2024 and 2026, with vesting dates spread across February 2026 to February 2029, reflecting ongoing participation in the long-term incentive plan.

What ESPP activity is disclosed for LyondellBasell insider Matthew Hayes?

The footnotes disclose an ESPP purchase of 142.1216 LyondellBasell shares allocated on March 31, 2026 at $38.97 per share. This reflects routine participation in the company’s employee stock purchase plan, separate from the restricted stock unit vesting and associated tax withholding.