LYB

SEC source: 0001562180-21-001930 · primarydocument.xml · derivative · entry 14

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 1,663 shares

Expires 2025-02-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F4 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 555 vested on February 17, 2016, 554 vested on February 17, 2017 and 554 vested on February 17, 2018.

SEC source: 0001562180-21-001930 · primarydocument.xml · derivative · entry 13

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 1,997 shares

Expires 2027-02-16

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F3 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 667 vested on February 16, 2018, 665 vested on February 16, 2019 and 665 vested on February 16, 2020.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 12

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,624

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 11

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,055

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 10

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,412

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 9

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,946

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 8

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,122

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 7

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,990

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 6

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,795

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 5

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,371

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 4

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,994

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 3

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,908

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 2

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,911

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001930 · primarydocument.xml · nonDerivative · entry 1

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,183

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F2 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022; 1,198 granted on February 20, 2020 that vest on February 20, 2023 and 1,433 granted on February 25, 2021 that vest on February 25, 2024.

SEC source: 0001562180-21-001697 · primarydocument.xml · derivative · entry 2

Smiley Jacinth C · CIK 0001735999 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,389

Underlying: Class A Ordinary Shares · 5,389 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 1,797 vest February 25, 2022, 1,796 vest February 25, 2023 and 1,796 vest February 25, 2024.

SEC source: 0001562180-21-001697 · primarydocument.xml · nonDerivative · entry 1

Smiley Jacinth C · CIK 0001735999 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,311

F1 · balance_after: Includes 6,428 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 627 granted on April 2, 2018 that vest on April 2, 2021; 306 granted on April 2, 2018 that vest on April 2, 2021; 678 granted on February 21, 2019 that vest on February 21, 2022; 1,166 granted on July 18, 2019 that vest on July 18, 2021; 1,166 granted on July 18, 2019 that vest on July 18, 2022 and 1,008 granted on February 20, 2020 that vest on February 20, 2023. The 1,477 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001688 · primarydocument.xml · derivative · entry 3

Patel Bhavesh V. · CIK 0001500293 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 163,337

Underlying: Class A Ordinary Shares · 163,337 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 54,447 vest February 25, 2022, 54,445 vest February 25, 2023 and 54,445 vest February 25, 2024.

SEC source: 0001562180-21-001688 · primarydocument.xml · nonDerivative · entry 1

Patel Bhavesh V. · CIK 0001500293 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 187,500

F1 · balance_after: Includes 101,480 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 34,782 granted on February 21, 2019 that vest on February 21, 2022 and 35,431 granted on February 20, 2020 that vest on February 20, 2023. The 31,267 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001209191-21-015458 · doc4.xml · nonDerivative · entry 3

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By LLC

Disclosed balance after: 41,395,260

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.0000 to $107.8050, 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.

F3 · ownership.direct: 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.

F7 · ownership.direct: 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.

SEC source: 0001209191-21-015458 · doc4.xml · nonDerivative · entry 2

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By partnerships

Disclosed balance after: 116,878

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.0000 to $107.8050, 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.

F3 · ownership.direct: 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.

F4 · ownership.direct: 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.

F5 · ownership.direct: 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.

F6 · ownership.direct: The securities reported are held directly as follows: (i) 15,528 ordinary shares by Altep 2010, (ii) 30,735 ordinary shares by Altep 2011, and (iii) 70,615 ordinary shares by Altep 2014.

SEC source: 0001209191-21-015458 · doc4.xml · nonDerivative · entry 1

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 763,494

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.0000 to $107.8050, 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.

F2 · ownership.direct: 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 majority of the outstanding voting interests in Access Industries, LLC.

F3 · ownership.direct: 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.

SEC source: 0001562180-21-001703 · primarydocument.xml · derivative · entry 2

Lane Kenneth Todd · CIK 0001782276 · EVP, Global O&P

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,707

Underlying: Class A Ordinary Shares · 30,707 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 10,237 vest February 25, 2022, 10,235 vest February 25, 2023 and 10,235 vest February 25, 2024.

SEC source: 0001562180-21-001703 · primarydocument.xml · nonDerivative · entry 1

Lane Kenneth Todd · CIK 0001782276 · EVP, Global O&P

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,400

F1 · balance_after: Includes 25,349 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 5,628 granted on July 15, 2019 that vest on July 15, 2021; 5,628 granted on July 15, 2019 that vest on July 15, 2022; 2,441 granted on July 15, 2019 that vest on July 15, 2022 and 5,774 granted on February 20, 2020 that vest on February 20, 2023. The 5,878 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001702 · primarydocument.xml · derivative · entry 2

Foley Kimberly A · CIK 0001791947 · SVP HSE, Glob Eng & Turnarnds

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,540

Underlying: Class A Ordinary Shares · 7,540 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 2,514 vest February 25, 2022, 2,513 vest February 25, 2023 and 2513 vest February 25, 2024.

SEC source: 0001562180-21-001702 · primarydocument.xml · nonDerivative · entry 1

Foley Kimberly A · CIK 0001791947 · SVP HSE, Glob Eng & Turnarnds

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,177.547

F1 · balance_after: 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 and 234 granted on August 1, 2020 that vest on August 1, 2023. The 1,444 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001698 · primarydocument.xml · derivative · entry 2

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,485

Underlying: Class A Ordinary Shares · 7,485 shares

Expires 2031-02-25

F2 · derivative.exercise_date: 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 25, 2021.

SEC source: 0001562180-21-001698 · primarydocument.xml · nonDerivative · entry 1

Seward James Malcolm · CIK 0001783902 · SVP, R&D, Tech & Sustain.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,520

F1 · balance_after: Includes 5,232 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,740 granted on August 29, 2018 that vest on August 29, 2021; 651 granted on February 21, 2019 that vest on February 21, 2022; 210 granted on August 15, 2019 that vest on August 15, 2022 and 1,198 granted on February 20, 2020 that vest on February 20, 2023. The 1,433 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001696 · primarydocument.xml · derivative · entry 2

McMurray Michael C. · CIK 0001556386 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,461

Underlying: Class A Ordinary Shares · 36,461 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 12,155 vest February 25, 2022, 12,153 vest February 25, 2023 and 12,153 vest February 25, 2024.

SEC source: 0001562180-21-001696 · primarydocument.xml · nonDerivative · entry 1

McMurray Michael C. · CIK 0001556386 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,769

F1 · balance_after: Includes 29,823 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 7,702 granted on November 5, 2019 that vest on November 5, 2021; 7,702 granted on November 5, 2019 that vest on November 5, 2022 and 7,439 granted on February 20, 2020 that vest on February 20, 2023. The 6,980 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001695 · primarydocument.xml · derivative · entry 2

Sharma Anup · CIK 0001767575 · SVP, Global Business Services

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,988

Underlying: Class A Ordinary Shares · 10,988 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 3,664 vest February 25, 2022, 3,662 vest February 25, 2023 and 3,662 vest February 25, 2024.

SEC source: 0001562180-21-001695 · primarydocument.xml · nonDerivative · entry 1

Sharma Anup · CIK 0001767575 · SVP, Global Business Services

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,185

F1 · balance_after: Includes 7,538 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,034 granted on February 21, 2019 that vest on February 21, 2022; 1,130 granted on February 21, 2019 that vest on February 21, 2022 and 2,270 granted on February 20, 2020 that vest on February 20, 2023. The 2,104 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001694 · primarydocument.xml · derivative · entry 2

Kaplan Jeffrey A · CIK 0001634184 · EVP & Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,948

Underlying: Class A Ordinary Shares · 25,948 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 8,650 vest February 25, 2022, 8,649 vest February 25, 2023 and 8,649 vest February 25, 2024.

SEC source: 0001562180-21-001694 · primarydocument.xml · nonDerivative · entry 1

Kaplan Jeffrey A · CIK 0001634184 · EVP & Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,386

F1 · balance_after: Includes 14,075 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 4,306 granted on February 21, 2019 that vest on February 21, 2022 and 4,802 granted on February 20, 2020 that vest on February 20, 2023. The 4,967 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001692 · primarydocument.xml · derivative · entry 2

Guilfoyle James D · CIK 0001649570 · EVP, Adv Polymer Sol & Sup Chn

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,102

Underlying: Class A Ordinary Shares · 27,102 shares

Expires 2031-02-25

F2 · derivative.exercise_date: 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 25, 2021.

SEC source: 0001562180-21-001692 · primarydocument.xml · nonDerivative · entry 1

Guilfoyle James D · CIK 0001649570 · EVP, Adv Polymer Sol & Sup Chn

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,408.65

F1 · balance_after: Includes 16,386 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 3,443 granted on February 21, 2019 that vest on February 21, 2022; 3,390 granted on February 21, 2019 that vest on February 21, 2022 and 4,365 granted on February 20, 2020 that vest on February 20, 2023. The 5,188 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001691 · primarydocument.xml · derivative · entry 2

Friedrichs Dale D · CIK 0001697503 · SVP, Human Res & Global Proj

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,602

Underlying: Class A Ordinary Shares · 14,602 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 4,868 vest February 25, 2022, 4,867 vest February 25, 2023 and 4,867 vest February 25, 2024.

SEC source: 0001562180-21-001691 · primarydocument.xml · nonDerivative · entry 1

Friedrichs Dale D · CIK 0001697503 · SVP, Human Res & Global Proj

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,821

F1 · balance_after: Includes 6,020 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan including 848 granted on February 21, 2019 that vest on February 21, 2022 and 2,376 granted on February 20, 2020 that vest on February 20, 2023. The 2,796 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001562180-21-001690 · primarydocument.xml · derivative · entry 2

Rhenman Torkel · CIK 0001780174 · EVP, I&D and Refining

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,707

Underlying: Class A Ordinary Shares · 30,707 shares

Expires 2031-02-25

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 10,237 vest February 25, 2022, 10,235 vest February 25, 2023 and 10,235 vest February 25, 2024.

SEC source: 0001562180-21-001690 · primarydocument.xml · nonDerivative · entry 1

Rhenman Torkel · CIK 0001780174 · EVP, I&D and Refining

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,790

F1 · balance_after: Includes 19,882 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 2,523 granted on July 15, 2019 that vest on July 15, 2021; 2,523 granted on July 15, 2019 that vest on July 15, 2022; 2,722 granted on July 15, 2019 that vest on July 15, 2022 and 6,236 granted on February 20, 2020 that vest on February 20, 2023. The 5,878 RSUs reported on this Form 4 vest on February 25, 2024.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 15

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By LLC

Disclosed balance after: 41,399,757

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.4300 to $107.8300, 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.

F3 · ownership.direct: 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.

F11 · ownership.direct: 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.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 14

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By LLC

Disclosed balance after: 41,597,993

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.4300 to $107.4275, 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.

F3 · ownership.direct: 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.

F11 · ownership.direct: 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.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 13

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By LLC

Disclosed balance after: 41,875,387

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.3800 to $106.3600, 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.

F3 · ownership.direct: 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.

F11 · ownership.direct: 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.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 12

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By LLC

Disclosed balance after: 41,906,930

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.2300 to $104.7500, 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.

F3 · ownership.direct: 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.

F11 · ownership.direct: 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.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 11

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By LLC

Disclosed balance after: 41,998,194

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.2300 to $104.2200, 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.

F3 · ownership.direct: 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.

F11 · ownership.direct: 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.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 10

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By partnerships

Disclosed balance after: 116,880

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.4300 to $107.8300, 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.

F3 · ownership.direct: 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.

F8 · ownership.direct: 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.

F9 · ownership.direct: 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.

F10 · ownership.direct: The securities reported are held directly as follows: (i) 15,528 ordinary shares by Altep 2010, (ii) 30,735 ordinary shares by Altep 2011, and (iii) 70,617 ordinary shares by Altep 2014.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 9

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By partnerships

Disclosed balance after: 119,703

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.4300 to $107.4275, 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.

F3 · ownership.direct: 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.

F8 · ownership.direct: 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.

F9 · ownership.direct: 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.

F10 · ownership.direct: The securities reported are held directly as follows: (i) 15,528 ordinary shares by Altep 2010, (ii) 30,735 ordinary shares by Altep 2011, and (iii) 70,617 ordinary shares by Altep 2014.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 8

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By partnerships

Disclosed balance after: 123,653

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.3800 to $106.3600, 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.

F3 · ownership.direct: 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.

F8 · ownership.direct: 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.

F9 · ownership.direct: 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.

F10 · ownership.direct: The securities reported are held directly as follows: (i) 15,528 ordinary shares by Altep 2010, (ii) 30,735 ordinary shares by Altep 2011, and (iii) 70,617 ordinary shares by Altep 2014.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 7

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By partnerships

Disclosed balance after: 124,103

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.2300 to $104.7500, 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.

F3 · ownership.direct: 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.

F8 · ownership.direct: 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.

F9 · ownership.direct: 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.

F10 · ownership.direct: The securities reported are held directly as follows: (i) 15,528 ordinary shares by Altep 2010, (ii) 30,735 ordinary shares by Altep 2011, and (iii) 70,617 ordinary shares by Altep 2014.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 6

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By partnerships

Disclosed balance after: 125,402

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.2300 to $104.2200, 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.

F3 · ownership.direct: 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.

F8 · ownership.direct: 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.

F9 · ownership.direct: 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.

F10 · ownership.direct: The securities reported are held directly as follows: (i) 15,528 ordinary shares by Altep 2010, (ii) 30,735 ordinary shares by Altep 2011, and (iii) 70,617 ordinary shares by Altep 2014.

SEC source: 0001209191-21-014899 · doc4.xml · nonDerivative · entry 5

AI INVESTMENTS HOLDINGS LLC · CIK 0001508237 · 10% owner

Access Industries Holdings LLC · CIK 0001391297 · 10% owner

ACCESS INDUSTRIES, LLC · CIK 0001508227 · 10% owner

ACCESS INDUSTRIES MANAGEMENT, LLC · CIK 0001508226 · 10% owner

Blavatnik Len · CIK 0001326628 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 763,495

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.4300 to $107.8300, 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.

F2 · ownership.direct: 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 majority of the outstanding voting interests in Access Industries, LLC.

F3 · ownership.direct: 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.