Sec Form 4 Filing - Foley Kimberly A @ LyondellBasell Industries N.V. - 2021-03-10

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 Foley Kimberly A 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) SVP HSE, Glob Eng & Turnarnds (Last) (First) (Middle) 4TH FLOOR, ONE VINE STREET 3. Date of Earliest Transaction (MM/DD/YY) 03/10/2021 (Street) LONDON, X0W1J 0AH 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 Class A Ordinary Shares 03/10/2021 M( 1 ) 2,237 A $ 92.69 21,414.547 ( 2 ) D Class A Ordinary Shares 03/10/2021 M( 1 ) 1,304 A $ 89.94 22,718.547 ( 2 ) D Class A Ordinary Shares 03/10/2021 M( 1 ) 1,707 A $ 83.35 24,425.547 ( 2 ) D Class A Ordinary Shares 03/10/2021 M( 1 ) 2,236 A $ 88.5 26,661.547 ( 2 ) D Class A Ordinary Shares 03/10/2021 F( 1 ) 1,405 D $ 108.9 25,256.547 ( 2 ) D Class A Ordinary Shares 03/10/2021 F( 1 ) 1,131 D $ 108.9 24,125.547 ( 2 ) D Class A Ordinary Shares 03/10/2021 F( 1 ) 1,920 D $ 108.9 22,205.547 ( 2 ) D Class A Ordinary Shares 03/10/2021 F( 1 ) 1,986 D $ 108.9 20,219.547 ( 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 (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 Stock Options (Right to Buy) $ 92.69 03/10/2021 M( 1 ) 2,237 ( 3 ) 02/16/2027 Class A Ordinary Shares 2,237 $ 0 0 D Stock Options (Right to Buy) $ 89.94 03/10/2021 M( 1 ) 1,304 ( 4 ) 02/17/2025 Class A Ordinary Shares 1,304 $ 0 0 D Stock Options (Right to Buy) $ 88.5 03/10/2021 M( 1 ) 2,236 ( 5 ) 02/21/2029 Class A Ordinary Shares 2,236 $ 0 1,117 D Stock Options (Right to Buy) $ 83.35 03/10/2021 M( 1 ) 1,707 ( 6 ) 02/20/2030 Class A Ordinary Shares 1,707 $ 0 3,414 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Foley Kimberly A 4TH FLOOR ONE VINE STREET LONDON, X0W1J 0AH SVP HSE, Glob Eng & Turnarnds Signatures /s/ Lara A. Mason, Attorney-in-Fact 03/11/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents a cashless exercise-and-hold, where shares were withheld to cover the option exercise price and anticipated taxes, and the remaining shares are retained by the reporting person. ( 2 )Includes 3,040 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 612 granted on February 21, 2019 that vest on February 21, 2022; 750 granted on February 20, 2020 that vest on February 20, 2023; 234 granted on August 1, 2020 that vest on August 1, 2023 and 1,444 granted on February 25, 2021 that vest on February 25, 2024. ( 3 )Granted pursuant to the issuer's long-term incentive plan. Award vested as follows: 747 vested on February 16, 2018, 745 vested on February 16, 2019 and 745 vested on February 16, 2020. ( 4 )Granted pursuant to the issuer's long-term incentive plan. Award vested as follows: 436 vested on February 17, 2016, 434 vested on February 17, 2017 and 434 vest on February 17, 2018. ( 5 )Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 1,119 vested on February 21, 2020, 1,117 vested on February 21, 2021 and 1,117 vest on February 21, 2022. ( 6 )Granted pursuant to the issuer's long-term incentive plan. Award vests in three equal installments on the 1st, 2nd and 3rd anniversaries of the date of grant of February 20, 2020.

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