LyondellBasell (LYB) EVP reports RSU vesting and tax-withheld shares

Rhea-AI Filing Summary

LyondellBasell Industries N.V. executive vice president for People and Culture, Trisha L. Conley, reported automatic dispositions of shares to cover tax withholding tied to restricted stock unit (RSU) vesting. On February 22 and 23, 2026, a total of 1,528 Class A Ordinary Shares were withheld by the issuer at prices around $56.66 per share.

These transactions were coded as tax-withholding dispositions rather than open-market sales, and Conley held 19,409 shares directly after the later transaction. Footnotes show she also holds 11,014 unvested RSUs granted under the company’s long-term incentive plan, scheduled to vest between 2026 and 2028.

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

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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^*

Conley Trisha L

(Last) (First) (Middle)

4TH FLOOR

ONE VINE STREET

(Street)

LONDON X0 W1J 0AH

(City) (State) (Zip)

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)
	EVP, People and Culture

3. Date of Earliest Transaction (Month/Day/Year)
02/22/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	02/22/2026		F		552(1)	D	$56.67	20,385(2)	D
Class A Ordinary Shares	02/23/2026		F		976(3)	D	$56.66	19,409(4)	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 February 22, 2026 the reporting person's restricted stock units automatically vested 2,265 shares. 552 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

2. Includes 15,022 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 4,008 granted on February 23, 2023 that vest on February 23, 2026; 2,265 granted on February 22, 2024 that vest on February 22, 2027; 2,917 granted on February 27, 2025 that vest on February 27, 2026; 2,916 granted on February 27, 2025 that vest on February 27, 2027 and 2,916 granted on February 27, 2025 that vest on February 27, 2028.

3. On February 23, 2026 the reporting person's restricted stock units automatically vested 4,008 shares. 976 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

4. Includes 11,014 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,265 granted on February 22, 2024 that vest on February 22, 2027; 2,917 granted on February 27, 2025 that vest on February 27, 2026; 2,916 granted on February 27, 2025 that vest on February 27, 2027 and 2,916 granted on February 27, 2025 that vest on February 27, 2028.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	02/24/2026
	** 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).
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FAQ

What insider activity did LyondellBasell (LYB) report for Trisha Conley?

LyondellBasell reported that EVP Trisha L. Conley had shares withheld to cover taxes on RSU vesting. Two Form 4 transactions show automatic dispositions of 552 and 976 Class A shares, both coded as tax-withholding events rather than open-market sales.

How many LyondellBasell (LYB) shares were disposed of for tax withholding?

A total of 1,528 LyondellBasell Class A shares were disposed of through tax withholding. The Form 4 shows 552 shares withheld on February 22, 2026, and 976 shares withheld on February 23, 2026, at per-share prices around $56.66–$56.67.

Did LyondellBasell EVP Trisha Conley sell LYB shares on the open market?

The filing indicates tax-withholding dispositions, not open-market sales. Both transactions are coded “F” for payment of tax liability by delivering securities, meaning the issuer withheld shares when RSUs vested to satisfy withholding obligations, rather than Conley selling shares in the market.

How many LyondellBasell (LYB) shares does Trisha Conley hold after these transactions?

After the February 23, 2026 transaction, Trisha Conley directly held 19,409 Class A shares. This figure appears in the Form 4 as the total shares following that tax-withholding disposition, reflecting her remaining directly owned equity stake after the RSU-related withholding.

What restricted stock units (RSUs) were involved for LyondellBasell EVP Trisha Conley?

Footnotes state that 2,265 RSUs vested on February 22, 2026 and 4,008 RSUs vested on February 23, 2026. Additional footnotes show she still holds 11,014 unvested RSUs scheduled to vest between 2026 and 2028 under LyondellBasell’s long-term incentive plan.

What is the role of Trisha Conley at LyondellBasell (LYB) in this Form 4?

Trisha L. Conley is listed as an officer of LyondellBasell with the title EVP, People and Culture. As a company executive, her equity transactions, including RSU vesting and related tax-withholding dispositions, must be reported publicly through Form 4 insider transaction filings.