FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * AI INTERNATIONAL CHEMICALS S.A.R.L.   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) (Last) (First) (Middle) 15-17 AVE. GASTON DIDERICH 3. Date of Earliest Transaction (Month/Day/Year) 02/22/2011 (Street) LUXEMBOURG, N4 L-1420 4. If Amendment, Date 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 (City) (State) (Zip) 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)

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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 Underlying Securities (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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
AI INTERNATIONAL CHEMICALS S.A.R.L. 15-17 AVE. GASTON DIDERICH LUXEMBOURG, N4 L-1420		X
AI CHEMICAL HOLDINGS LLC 730 FIFTH AVENUE NEW YORK, NY 10019		X
AI SMS L.P. TRINITY CHAMBERS, ROAD TOWN TORTOLA, D8		X
AI SMS GP Ltd TRINITY CHAMBERS, ROAD TOWN TORTOLA, D8		X
ACCESS INDUSTRIES, LLC 730 FIFTH AVENUE NEW YORK, NY 10019		X
ACCESS INDUSTRIES MANAGEMENT, LLC 730 FIFTH AVENUE NEW YORK, NY 10019		X
Blavatnik Len 730 FIFTH AVENUE NEW YORK, NY 10019		X
ALTEP 2010 L.P. 730 FIFTH AVENUE NEW YORK, NY 10019		X
ACCESS INDUSTRIES INC 730 FIFTH AVENUE NEW YORK, NY 10019		X

Signatures

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
**Signature of Reporting Person		Date
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

Explanation of Responses:

*	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).
(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.

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