Was the 540-share disposition by LYB director Anthony R. Chase an open-market sale?

No. The 540-share disposition was for tax withholding on vested restricted stock units. The issuer withheld these shares at $69.72 per share to satisfy tax obligations, so it does not represent an open-market sale by the director or a discretionary trade.

LyondellBasell (NYSE: LYB) director logs RSU grant and 540-share tax withholding

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

LyondellBasell Industries N.V. director Anthony R. Chase reported routine equity compensation activity involving Class A Ordinary Shares. On May 21, 2026, he acquired 2,321 shares at $0.00 per share as a grant under the company’s long-term incentive plan, which represents restricted stock units vesting on May 21, 2027.

On May 22, 2026, 2,917 restricted stock units vested automatically, and 540 shares were withheld by the issuer at $69.72 per share to cover tax obligations, a non-market tax-withholding disposition rather than an open-market sale. After these transactions, Chase directly owned 13,603 shares of LyondellBasell common stock, in addition to unvested restricted stock units noted in the filing.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider CHASE ANTHONY R

Role null

Type	Security	Shares	Price	Value
Tax Withholding	Class A Ordinary Shares	540	$69.72	$38K
Grant/Award	Class A Ordinary Shares	2,321	$0.00	--

Holdings After Transaction: Class A Ordinary Shares — 13,603 shares (Direct, null)

Footnotes (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. On May 22, 2026 the reporting person's restricted stock units automatically vested 2,917 shares. 540 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. 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: 2,321 shares at $0.00 Tax-withheld shares: 540 shares at $69.72 Post-transaction holdings: 13,603 shares +2 more

5 metrics

RSU grant 2,321 shares at $0.00 Class A Ordinary Shares granted on May 21, 2026

Tax-withheld shares 540 shares at $69.72 Shares withheld for tax obligations on May 22, 2026

Post-transaction holdings 13,603 shares Direct Class A Ordinary Shares after transactions

Tax-withholding shares total 540 shares TaxWithholdingShares in transaction summary

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

Key Terms

restricted stock units, RSUs, long-term incentive plan, tax withholding obligations, +1 more

5 terms

restricted stock units financial

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

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.

RSUs financial

"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."

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

long-term incentive plan financial

"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."

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

"540 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""

Form 4 Insider Transactions: What Each Field Means →

05/26/2026 - 04:04 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^*

CHASE ANTHONY R

(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)
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	05/21/2026		A		2,321	A	$0.00	14,143⁽¹⁾	D
Class A Ordinary Shares	05/22/2026		F		540⁽²⁾	D	$69.72	13,603⁽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. 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. 540 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did LyondellBasell (LYB) director Anthony R. Chase report?

Anthony R. Chase reported receiving 2,321 Class A shares as a stock grant and a separate tax-withholding disposition of 540 shares. Both transactions are tied to restricted stock units granted under LyondellBasell’s long-term incentive plan, reflecting routine equity compensation activity.

What equity award did Anthony R. Chase receive from LyondellBasell (LYB)?

Chase received 2,321 Class A Ordinary Shares as a grant with a $0.00 grant price. These shares represent restricted stock units under LyondellBasell’s long-term incentive plan and are scheduled to vest on May 21, 2027, subject to the plan’s normal conditions and service requirements.

How many LyondellBasell (LYB) shares does Anthony R. Chase hold after these transactions?

Following the reported transactions, Chase directly owned 13,603 Class A Ordinary Shares. This figure reflects his position after the 2,321-share grant and the 540 shares withheld for taxes, and it is separate from any remaining unvested restricted stock units reported.

How are restricted stock units (RSUs) described in the LyondellBasell (LYB) Form 4?

The Form 4 describes RSUs as awards under LyondellBasell’s long-term incentive plan that convert into shares upon vesting. One footnote notes RSUs that vested into 2,917 shares on May 22, 2026 and others, including 2,321 units, scheduled to vest on May 21, 2027.

Does the LYB Form 4 indicate any derivative option exercises by Anthony R. Chase?

No. The filing shows no derivative security exercises, with derivative transaction counts at zero. The reported activity involves only non-derivative Class A Ordinary Shares linked to restricted stock unit grants and tax-withholding on RSU vesting, not options or other derivative instruments.