LyondellBasell (NYSE: LYB) director granted 708 shares with 111 withheld for taxes

Rhea-AI Filing Summary

LyondellBasell Industries N.V. director Bridget E. Karlin received a stock award and related tax withholding on Class A Ordinary Shares. She acquired 708 shares on March 31, 2026 as part of her annual retainer, which she had elected to receive in common stock rather than cash.

The number of shares for this retainer installment was calculated using a share value of $59.31, the average of daily closing prices over the applicable quarter. On the same date, 111 shares valued at $80.56 per share were withheld to satisfy tax obligations, a non‑market disposition. After these transactions, she directly holds 4,905 shares, including 2,917 restricted stock units that are scheduled to vest on May 22, 2026.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Karlin Bridget E

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Class A Ordinary Shares	708	$0.00	--
Tax Withholding	Class A Ordinary Shares	111	$80.56	$9K

Holdings After Transaction: Class A Ordinary Shares — 5,016 shares (Direct)

Footnotes (1)

1. Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which is paid in quarterly installments. The number of shares issued was calculated based on $59.31, which is the average of the daily closing prices of the issuer's shares over the applicable quarter. Includes 2,917 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 22, 2026.

Key Figures

Stock award shares: 708 shares Tax withholding shares: 111 shares Post-transaction holdings: 4,905 shares +3 more

6 metrics

Stock award shares 708 shares Class A Ordinary Shares granted on March 31, 2026

Tax withholding shares 111 shares Shares withheld for tax liability at $80.56 per share

Post-transaction holdings 4,905 shares Total Class A Ordinary Shares directly held after transactions

Restricted stock units 2,917 RSUs RSUs vesting on May 22, 2026 under long-term incentive plan

Retainer reference price $59.31 per share Average of daily closing prices used to calculate retainer shares

Tax withholding price $80.56 per share Value applied to 111 shares withheld for tax obligations

Key Terms

restricted stock units, long-term incentive plan, annual retainer, tax liability

4 terms

restricted stock units financial

"Includes 2,917 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

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

annual retainer financial

"elected to receive common stock in lieu of cash for her annual retainer, which is paid in quarterly installments"

tax liability financial

"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^*

Karlin Bridget E

(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)
03/31/2026

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	03/31/2026		A		708(1)	A	$0.00	5,016(2)	D
Class A Ordinary Shares	03/31/2026		F		111	D	$80.56	4,905(2)	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. Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which is paid in quarterly installments. The number of shares issued was calculated based on $59.31, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

2. Includes 2,917 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 22, 2026.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	04/02/2026
	** 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 director Bridget E. Karlin report?

Bridget E. Karlin reported receiving 708 Class A Ordinary Shares as a stock award on March 31, 2026. The award reflects her elected annual retainer in stock rather than cash, calculated from the average closing price over the quarter.

How were the 708 LYB shares for Bridget Karlin’s retainer calculated?

The 708 shares were calculated using a value of $59.31 per share, the average of LyondellBasell’s daily closing prices for the applicable quarter. This formula determined how many shares matched her quarterly director retainer.

Why were 111 LYB shares disposed of in Bridget Karlin’s Form 4?

The 111 shares were withheld to cover tax liabilities related to the stock award, not sold on the open market. They were valued at $80.56 per share and represent a tax-withholding disposition rather than a discretionary share sale.

How many LYB shares does Bridget Karlin hold after these transactions?

After the March 31, 2026 transactions, Bridget Karlin directly holds 4,905 Class A Ordinary Shares. This total includes 2,917 restricted stock units that are scheduled to vest on May 22, 2026 under LyondellBasell’s long-term incentive plan.

What LYB restricted stock units does Bridget Karlin have outstanding?

Bridget Karlin holds 2,917 restricted stock units under LyondellBasell’s long-term incentive plan. These RSUs are scheduled to vest on May 22, 2026, potentially converting into an equal number of shares if all vesting conditions are satisfied.

Is Bridget Karlin’s LYB Form 4 a market purchase or sale?

The Form 4 reflects a stock grant and tax withholding, not open-market trading. She received 708 shares as compensation for her director retainer, while 111 shares were withheld to pay taxes, a non-market disposition by the issuer.