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).

1. Name and Address of Reporting Person* AI INTERNATIONAL CHEMICALS S.A.R.L. (Last) (First) (Middle) 15-17 AVE. GASTON DIDERICH (Street) LUXEMBOURG N4 L-1420 (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 X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 02/22/2011
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X 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	02/22/2011		S		208,262	D	$28	89,901,094	D(1)
Class A Ordinary Shares	02/22/2011		P		208,262	A	$28	208,262	I(2)	By partnership
Class A Ordinary Shares								334,010	D(3)

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

1. Name and Address of Reporting Person* AI INTERNATIONAL CHEMICALS S.A.R.L. (Last) (First) (Middle) 15-17 AVE. GASTON DIDERICH (Street) LUXEMBOURG N4 L-1420 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* AI CHEMICAL HOLDINGS LLC (Last) (First) (Middle) 730 FIFTH AVENUE (Street) NEW YORK NY 10019 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* AI SMS L.P. (Last) (First) (Middle) TRINITY CHAMBERS, ROAD TOWN (Street) TORTOLA D8 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* AI SMS GP Ltd (Last) (First) (Middle) TRINITY CHAMBERS, ROAD TOWN (Street) TORTOLA D8 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ACCESS INDUSTRIES, LLC (Last) (First) (Middle) 730 FIFTH AVENUE (Street) NEW YORK NY 10019 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ACCESS INDUSTRIES MANAGEMENT, LLC (Last) (First) (Middle) 730 FIFTH AVENUE (Street) NEW YORK NY 10019 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Blavatnik Len (Last) (First) (Middle) 730 FIFTH AVENUE (Street) NEW YORK NY 10019 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ALTEP 2010 L.P. (Last) (First) (Middle) 730 FIFTH AVENUE (Street) NEW YORK NY 10019 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ACCESS INDUSTRIES INC (Last) (First) (Middle) 730 FIFTH AVENUE (Street) NEW YORK NY 10019 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. The securities reported are held directly by AI International Chemicals S.A.R.L. ("AIIC") and may be deemed to be held indirectly by each of the other reporting persons (other than Altep 2010 L.P. and Access Industries, Inc.), because AIIC is a wholly owned subsidiary of AI Chemical Holdings LLC, which is a wholly owned subsidiary of AI SMS L.P., a partnership of which AI SMS GP Limited is the general partner, which is a wholly owned subsidiary of Access Industries, LLC, which is controlled by Access Industries Management, LLC, which is controlled by Mr. Blavatnik. Each of the reporting persons (other than AIIC) disclaims beneficial ownership of these securities, except to the extent of its or his pecuniary interest therein, and this Form shall not be construed as an admission that any such reporting person is the beneficial owner of any of the securities reported on this Form.

2. The securities reported are held directly by Altep 2011 L.P. ("Altep 2011") and may be deemed to be beneficially owned by Access Industries, Inc. and Mr. Blavatnik because Access Industries, Inc. is the general partner of Altep 2011 and Mr. Blavatnik controls Access Industries, Inc. Each of the reporting persons disclaims beneficial ownership of these securities, except to the extent of its or his pecuniary interest therein, and this Form shall not be construed as an admission that any such reporting person is the beneficial owner of any such securities.

3. The securities reported are held directly by Altep 2010 L.P. ("Altep 2010") and may be deemed to be beneficially owned by Access Industries, Inc. and Mr. Blavatnik because Access Industries, Inc. is the general partner of Altep 2010 and Mr. Blavatnik controls Access Industries, Inc. Each of the reporting persons (other than Altep 2010) disclaims beneficial ownership of these securities, except to the extent of its or his pecuniary interest therein, and this Form shall not be construed as an admission that any such reporting person is the beneficial owner of any such securities.

	Alejandro Moreno for AI International Chemicals S.A.R.L., AI Chemical Holdings LLC, Access Industries, LLC, Access Industries Management, LLC, Altep 2010 L.P. and Access Industries, Inc. and as Attorney-in-Fact for Mr. Blavatnik	02/22/2011
	Ronan J.E. Kuczaj for Belvaux Management Limited for AI SMS L.P. and AI SMS GP Limited	02/22/2011
	** Signature of Reporting Person	Date
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