Sec Form 4 Filing - AI INVESTMENTS HOLDINGS LLC @ LyondellBasell Industries N.V. - 2021-02-12

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 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 INVESTMENTS HOLDINGS LLC 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) C/O ACCESS INDUSTRIES, INC., 40 WEST 57TH STREET, 28TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 02/12/2021 (Street) NEW YORK, NY10019 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Ordinary shares 02/12/2021 S 53 D $ 95.3895 ( 1 ) 763,822 D ( 2 ) ( 3 ) Ordinary shares 02/12/2021 S 23 D $ 96.1148 ( 4 ) 763,799 D ( 2 ) ( 3 ) Ordinary shares 02/12/2021 S 10,336 D $ 95.3895 ( 1 ) 163,924 I ( 3 ) ( 5 ) ( 6 ) ( 7 ) By partnerships Ordinary shares 02/12/2021 S 4,530 D $ 96.1148 ( 4 ) 159,394 I ( 3 ) ( 5 ) ( 6 ) ( 7 ) By partnerships Ordinary shares 02/12/2021 S 12,312 D $ 95.3895 ( 1 ) 10,639,539 I ( 3 ) ( 6 ) ( 8 ) ( 9 ) By LLCs Ordinary shares 02/12/2021 S 5,396 D $ 96.1148 ( 4 ) 10,634,143 I ( 3 ) ( 6 ) ( 8 ) ( 9 ) By LLCs Ordinary shares 02/12/2021 S 251,080 D $ 95.3895 ( 1 ) 43,009,549 I ( 3 ) ( 10 ) By LLC Ordinary shares 02/12/2021 S 110,050 D $ 96.1148 ( 4 ) 42,899,499 I ( 3 ) ( 10 ) By LLC Ordinary shares 16,000,000 I ( 3 ) ( 11 ) By partnership Ordinary shares 3,522,699 I ( 3 ) ( 12 ) By LLC

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 INVESTMENTS HOLDINGS LLC C/O ACCESS INDUSTRIES, INC. 40 WEST 57TH STREET, 28TH FLOOR NEW YORK, NY10019 X Access Industries Holdings LLC C/O ACCESS INDUSTRIES, INC. 40 WEST 57TH STREET, 28TH FLOOR NEW YORK, NY10019 X ACCESS INDUSTRIES, LLC C/O ACCESS INDUSTRIES, INC. 40 WEST 57TH STREET, 28TH FLOOR NEW YORK, NY10019 X ACCESS INDUSTRIES MANAGEMENT, LLC C/O ACCESS INDUSTRIES, INC. 40 WEST 57TH STREET, 28TH FLOOR NEW YORK, NY10019 X Blavatnik Len C/O ACCESS INDUSTRIES, INC. 40 WEST 57TH STREET, 28TH FLOOR NEW YORK, NY10019 X Signatures /s/ Alejandro Moreno for AI Investments Holdings LLC 02/17/2021 Signature of Reporting Person Date /s/ Alejandro Moreno for Access Industries Holdings LLC 02/17/2021 Signature of Reporting Person Date /s/ Alejandro Moreno for Access Industries, LLC 02/17/2021 Signature of Reporting Person Date /s/ Alejandro Moreno for Access Industries Management, LLC 02/17/2021 Signature of Reporting Person Date /s/ Alejandro Moreno, as Attorney-in-Fact for Mr. Blavatnik 02/17/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.02 to $95.67, inclusive. The reporting person undertakes to provide to LyondellBasell Industries N.V., any security holder of LyondellBasell Industries N.V., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4. ( 2 )The securities reported are held directly by AI Investments Holdings LLC ("AIIH") and may be deemed to be indirectly beneficially owned by Access Industries, LLC, Access Industries Holdings LLC, Access Industries Management, LLC and Len Blavatnik because Access Industries Holdings LLC controls a majority of the outstanding voting interests in AIIH, Access Industries, LLC controls a majority of the outstanding voting interests in Access Industries Holdings LLC, Access Industries Management, LLC controls Access Industries, LLC, Access Industries Holdings LLC and AIIH, and Mr. Blavatnik controls Access Industries Management, LLC and a maj ority of the outstanding voting interests in Access Industries, LLC. ( 3 )Each of the reporting persons (other than the direct holder) 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. ( 4 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $96.00 to $96.27, inclusive. The reporting person undertakes to provide to LyondellBasell Industries N.V., any security holder of LyondellBasell Industries N.V., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4. ( 5 )Len Blavatnik may be deemed to indirectly beneficially own the ordinary shares held directly by Altep 2010 L.P. ("Altep 2010"), Altep 2011 L.P. ("Altep 2011") and Altep 2014 L.P. ("Altep 2014") because he controls AI Altep Holdings, Inc. and AI Altep Holdings, Inc. is the general partner of each of Altep 2010, Altep 2011 and Altep 2014. ( 6 )Because of their relationships with the other Reporting Persons, each of Access Industries Holdings LLC, Access Industries, LLC and Access Industries Management, LLC may be deemed to beneficially own the ordinary shares held directly by Altep 2010, Altep 2011, Altep 2014, AI Altep Investments LLC (formerly AI New Holdings LLC) and AI Chemical Holdings LLC (formerly, AI New Holdings 2 LLC). Each of the Reporting Persons, and each of their affiliated entities and the officers, partners, members, and managers thereof, disclaims beneficial ownership of the ordinary shares held directly by each of Altep 2010, Altep 2011, Altep 2014, AI Altep Investments LLC and AI Chemical Holdings LLC. ( 7 )The securities reported are held directly as follows: (i) 15,600 ordinary shares by Altep 2010, (ii) 72,526 ordinary shares by Altep 2011, and (iii) 71,268 ordinary shares by Altep 2014. ( 8 )Each of Access Industries Management, LLC, Access Industries Holdings LLC and Len Blavatnik may be deemed to indirectly beneficially own the ordinary shares held directly by AI Chemical Holdings LLC because Mr. Blavatnik controls Access Industries Management, LLC, Access Industries Holdings LLC owns a majority of the outstanding voting interests in RSB 2 Limited which is the sole member of AI Chemical Holdings LLC, and Access Industries Management, LLC controls AI Chemical Holdings LLC and Access Industries Holdings LLC. Len Blavatnik may be deemed to indirectly beneficially own the ordinary shares held directly by AI Altep Investments LLC because he controls AI Altep Holdings, Inc. and AI Altep Holdings, Inc. holds all of the outstanding voting interests in AI Altep Investments LLC. ( 9 )The securities reported are held directly as follows: (i) 10,456,829 ordinary shares owned directly by AI Chemical Holdings LLC, and (ii) 177,314 ordinary shares owned directly by AI Altep Investments LLC. ( 10 )The securities reported are held directly by AI International Chemicals LLC ("AIIC") and may be deemed to be indirectly beneficially owned by AIIH, Access Industries, LLC, Access Industries Holdings LLC, Access Industries Management, LLC and Len Blavatnik because AIIH holds a majority of the outstanding voting interests in AIIC, Access Industries Holdings LLC controls a majority of the outstanding voting interests in AIIH, Access Industries, LLC controls a majority of the outstanding voting interests in Access Industries Holdings LLC, Access Industries Management, LLC controls Access Industries, LLC, Access Industries Holdings LLC, AIIH and AIIC, and Mr. Blavatnik controls Access Industries Management, LLC and a majority of the outstanding voting interests in Access Industries, LLC. ( 11 )The securities reported are held directly by AI European Holdings L.P. ("AIEH") and may be deemed to be indirectly beneficially owned by Access Industries Holdings LLC, Access Industries, LLC, Access Industries Management, LLC, and Len Blavatnik because Access Industries Holdings LLC, Access Industries, LLC and Access Industries Management, LLC control, or hold a majority of the outstanding voting interests in, entities that directly or indirectly control AIEH, Access Industries, LLC controls a majority of the outstanding voting interests in Access Industries Holdings LLC, Access Industries Management, LLC controls Access Industries, LLC and Access Industries Holdings LLC and Mr. Blavatnik controls Access Industries Management, LLC and a majority of the outstanding voting interests in Access Industries, LLC. ( 12 )The securities reported are held directly by AIPH Holdings LLC ("AIPH") and may be deemed to be indirectly beneficially owned by Access Industries, LLC, Access Industries Holdings LLC, Access Industries Management, LLC and Len Blavatnik because Access Industries Holdings LLC controls a majority of the outstanding voting interests in AIPH, Access Industries, LLC controls a majority of the outstanding voting interests in Access Industries Holdings LLC, Access Industries Management, LLC controls Access Industries, LLC, Access Industries Holdings LLC and AIPH and Mr. Blavatnik controls Access Industries Management, LLC and a majority of the outstanding voting interests in Access Industries, LLC.

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