[Form 4] LyondellBasell Industries N.V. Insider Trading Activity

Rhea-AI Filing Summary

Peter Z. E. Vanacker, Chief Executive Officer and Director of LyondellBasell Industries N.V. (LYB), sold 20,000 Class A ordinary shares on 08/15/2025 at a weighted-average price of $53.5711 per share. After the reported sale, the filing shows the reporting person beneficially owns 160,351 shares, which include 116,241 restricted stock units granted under the issuer's long-term incentive plan with specified vesting tranches in 2026, 2027 and 2028. The sale was executed in multiple trades at prices between $53.39 and $53.67 as disclosed, and the Form 4 was signed by an attorney-in-fact on behalf of the reporting person.

Positive

• Form 4 discloses the sale and remaining beneficial ownership, including detailed RSU grant dates and vesting schedules, supporting transparency

Negative

• None.

Insights

Financial Analyst

TL;DR: Insider sale of 20,000 shares is documented and appears immaterial to LYB's market capitalization.

The Form 4 reports an open-market sale of 20,000 Class A ordinary shares by CEO and Director Peter Vanacker at a weighted-average price of $53.5711 on 08/15/2025. The filing discloses remaining beneficial ownership of 160,351 shares, including 116,241 RSUs with multi-year vesting. Given the disclosed size of the holding and that the sale was executed across multiple trades at prices between $53.39 and $53.67, this transaction appears to be a routine insider sale rather than a material corporate event. The filing provides the necessary trade-price range and offers to supply full trade details upon request, supporting transparency.

Corporate Governance Expert

TL;DR: The disclosure is procedurally compliant and includes vesting detail for RSUs, supporting governance transparency.

The Form 4 clearly identifies the reporting person as both CEO and Director and discloses the relationship to the issuer, the transaction date, transaction code (S, sale), and weighted-average price. It also specifies the composition of beneficial ownership by referencing 116,241 RSUs with explicit grant dates and vesting schedules. The signature by an attorney-in-fact and the explanation of price range meet disclosure expectations. There is no indication in the form of unusual governance concerns or atypical insider activity beyond a documented sale.

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^*

Vanacker Peter Z. E.

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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	08/15/2025		S		20,000	D	$53.5711(1)	160,351(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. This transaction was executed in multiple trades at prices ranging from $53.39 to $53.67. The price reported above reflects the weighted-average sale price. The reporting person herby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

2. Includes 116,241 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 28,211 granted on February 23, 2023 that vest on February 23, 2026; 15,406 vest on February 22, 2026 and 15,406 vest on February 22, 2027 and 57,218 granted on February 27, 2025 of which 19,074 vest on February 27, 2026, 19,072 vest on February 27, 2027 and 19,072 vest on February 27, 2028.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	08/15/2025
	** 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.

FAQ

What did LYB insider Peter Vanacker do on 08/15/2025?

He sold 20,000 Class A ordinary shares in multiple trades at a weighted-average price of $53.5711 per share on 08/15/2025.

How many LYB shares does Peter Vanacker beneficially own after the sale?

160,351 shares beneficially owned following the reported transaction, including restricted stock units.

How many RSUs are included in Vanacker's reported beneficial ownership and what are the vesting tranches?

116,241 RSUs comprised of grants on 02/23/2023 (28,211 vest 02/23/2026), 02/22/2024 grants with 15,406 vesting 02/22/2026 and 15,406 vesting 02/22/2027, and 02/27/2025 grant of 57,218 with vesting in 2026–2028 as specified.

At what prices were the shares sold?

The trades occurred between $53.39 and $53.67, and the filing reports a weighted-average sale price of $53.5711.

Who signed the Form 4 for the reporting person?

The Form 4 was signed by Lara A. Mason, Attorney-in-Fact, on 08/15/2025.