17,247-share RSU grant to LyondellBasell (LYB) EVP Aaron Ledet detailed

Rhea-AI Filing Summary

LyondellBasell Industries N.V. executive vice president Aaron J. Ledet reported equity compensation and related tax withholding activity. He received a grant of 17,247 Class A Ordinary Share restricted stock units at no cost, which vest in three equal annual installments starting on February 28, 2027. Separately, 609 shares were withheld on February 27, 2026 to cover tax obligations when 2,497 previously granted restricted stock units vested. Following these transactions, his directly held and RSU-based ownership totaled 31,713.5326 shares, including 23,473 restricted stock units scheduled to vest between 2027 and 2029.

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
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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^*

Ledet Aaron J

(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, I&D & Supply Chain

3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026

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	02/27/2026		F		609(1)	D	$57.52	14,466.5326(2)	D
Class A Ordinary Shares	02/28/2026		A		17,247	A	$0.00	31,713.5326(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 February 27, 2026 the reporting person's restricted stock units automatically vested 2,497 shares. 609 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

2. Includes 6,226 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028.

3. Includes 23,473 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,232 granted on February 22, 2024 that vest on February 22, 2027; 2,497 granted on February 27, 2025 that vest on February 26, 2027 and 2,497 granted on February 27, 2025 that vest on February 26, 2028. The 17,247 RSUs reported on this Form 4 vest as follows: 5,749 vest on February 28, 2027, 5,749 vest on February 28, 2028 and 5,749 vest on February 28, 2029.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	03/03/2026
	** 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.
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FAQ

What insider transactions did LYB executive Aaron J. Ledet report?

Aaron J. Ledet reported a grant of 17,247 Class A Ordinary Share restricted stock units and a withholding of 609 shares for taxes. The tax withholding related to the vesting of 2,497 previously granted restricted stock units under LyondellBasell’s long-term incentive plan.

Was the 609-share disposition by LYB’s Aaron J. Ledet an open-market sale?

No, the 609-share disposition was for tax withholding, not an open-market sale. Shares were withheld by LyondellBasell to satisfy tax obligations triggered when 2,497 restricted stock units vested on February 27, 2026 under the company’s long-term incentive program.

How many restricted stock units did LYB grant to Aaron J. Ledet?

LyondellBasell granted Aaron J. Ledet 17,247 restricted stock units tied to Class A Ordinary Shares. These units vest in three equal tranches of 5,749 each on February 28, 2027, February 28, 2028, and February 28, 2029, subject to the plan’s terms.

What is Aaron J. Ledet’s LYB share and RSU ownership after these transactions?

After the reported transactions, Aaron J. Ledet held a total of 31,713.5326 Class A Ordinary Shares, including 23,473 restricted stock units. Those restricted stock units are scheduled to vest between February 2027 and February 2029 under LyondellBasell’s long-term incentive plan.

How do the new LYB RSUs granted to Aaron J. Ledet vest over time?

The 17,247 newly granted restricted stock units vest in three equal installments. Specifically, 5,749 units vest on February 28, 2027, another 5,749 on February 28, 2028, and the final 5,749 on February 28, 2029, assuming continued eligibility.