LYB

SEC source: 0001562180-20-000095 · primarydocument.xml · nonDerivative · entry 1

Hanley Michael Sean · CIK 0001760238 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,566

F1 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-20-000090 · primarydocument.xml · nonDerivative · entry 6

Aebischer Thomas · CIK 0001662213 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,265

F7 · shares: The reporting person's employment with the company ended on December 31, 2019 due to retirement and, pursuant to the terms of his restricted stock unit award, forfeited the 1,973 shares reported on this Form 4.

F5 · price: Price is not applicable.

SEC source: 0001562180-20-000090 · primarydocument.xml · nonDerivative · entry 5

Aebischer Thomas · CIK 0001662213 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,238

F6 · shares: The reporting person's employment with the company ended on December 31, 2019 due to retirement and, pursuant to the terms of his restricted stock unit award, forfeited the 173 shares reported on this Form 4.

F5 · price: Price is not applicable.

SEC source: 0001562180-20-000090 · primarydocument.xml · nonDerivative · entry 4

Aebischer Thomas · CIK 0001662213 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,411

F4 · shares: The reporting person's employment with the company ended on December 31, 2019 due to retirement and, pursuant to the terms of his restricted stock unit award, forfeited the 4,841 shares reported on this Form 4.

F5 · price: Price is not applicable.

SEC source: 0001562180-20-000090 · primarydocument.xml · nonDerivative · entry 3

Aebischer Thomas · CIK 0001662213 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,252

F3 · shares: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 3,492 shares of restricted stock units granted to the reporting person on February 21, 2018.

SEC source: 0001562180-20-000090 · primarydocument.xml · nonDerivative · entry 2

Aebischer Thomas · CIK 0001662213 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,627

F2 · shares: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 6,071 shares of restricted stock units granted to the reporting person on February 16, 2017.

SEC source: 0001562180-20-000090 · primarydocument.xml · nonDerivative · entry 1

Aebischer Thomas · CIK 0001662213 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,016

F1 · shares: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 2,131 shares of restricted stock units granted to the reporting person on February 21, 2019.

SEC source: 0001562180-20-000096 · primarydocument.xml · nonDerivative · entry 1

Cooper Stephen Forbes · CIK 0001335032 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,836

F1 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-20-000092 · primarydocument.xml · nonDerivative · entry 2

DICCIANI NANCE K · CIK 0001198097 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,170.612

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-20-000092 · primarydocument.xml · nonDerivative · entry 1

DICCIANI NANCE K · CIK 0001198097 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,257.612

F1 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-20-000094 · primarydocument.xml · nonDerivative · entry 2

FARLEY CLAIRE S · CIK 0001204506 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,598

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-20-000094 · primarydocument.xml · nonDerivative · entry 1

FARLEY CLAIRE S · CIK 0001204506 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,677

F1 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-20-000091 · primarydocument.xml · nonDerivative · entry 2

Buchanan Robin W.T. · CIK 0001519805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,640.573

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-20-000091 · primarydocument.xml · nonDerivative · entry 1

Buchanan Robin W.T. · CIK 0001519805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,714.573

F1 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $91.65, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-22-001424 · primarydocument.xml · nonDerivative · entry 4

Buchanan Robin W.T. · CIK 0001519805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,594.026

F1 · security: This Form 4 is being filed late due to inadvertent administrative error. The Reporting Person has agreed to voluntarily disgorge to the Issuer all short-swing profits realized by the Reporting Person from relevant transactions.

F2 · shares: Represents shares accumulated through inadvertent automatic dividend reinvestment in reporting person's personal brokerage account, contrary to written directions provided to the financial institution by reporting person.

F3 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 1,531 granted on May 27, 2021 that vest on May 27, 2022.

SEC source: 0001562180-19-005798 · primarydocument.xml · nonDerivative · entry 1

Hanley Michael Sean · CIK 0001760238 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,447

F1 · shares: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting 914 shares of restricted stock units granted to the reporting person on November 30, 2018.

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-005407 · primarydocument.xml · derivative · entry 4

Covezzi Massimo · CIK 0001500649 · SVP Research & Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Ordinary Shares · 5,568 shares

Expires 2026-02-16

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.

F3 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vested in three equal installments on the 1st, 2nd and 3rd anniversaries of the date of grant of February 16, 2016.

SEC source: 0001562180-19-005407 · primarydocument.xml · nonDerivative · entry 3

Covezzi Massimo · CIK 0001500649 · SVP Research & Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,634

F2 · price: This transaction was executed in multiple trades at prices ranging from $96.75 to $96.90. The price reported above reflects the weighted-average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F1 · balance_after: Includes 3,899 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,234 granted on February 16, 2017 that vest on February 16, 2020; 1,247 granted on February 21, 2018 that vest on February 21, 2021 and 1,418 granted on February 21, 2019 that vest on February 21, 2022.

SEC source: 0001562180-19-005407 · primarydocument.xml · nonDerivative · entry 2

Covezzi Massimo · CIK 0001500649 · SVP Research & Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,828

F2 · price: This transaction was executed in multiple trades at prices ranging from $96.75 to $96.90. The price reported above reflects the weighted-average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F1 · balance_after: Includes 3,899 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,234 granted on February 16, 2017 that vest on February 16, 2020; 1,247 granted on February 21, 2018 that vest on February 21, 2021 and 1,418 granted on February 21, 2019 that vest on February 21, 2022.

SEC source: 0001562180-19-005407 · primarydocument.xml · nonDerivative · entry 1

Covezzi Massimo · CIK 0001500649 · SVP Research & Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,396

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 · balance_after: Includes 3,899 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 1,234 granted on February 16, 2017 that vest on February 16, 2020; 1,247 granted on February 21, 2018 that vest on February 21, 2021 and 1,418 granted on February 21, 2019 that vest on February 21, 2022.

SEC source: 0001562180-19-005396 · primarydocument.xml · derivative · entry 2

McMurray Michael C. · CIK 0001556386 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 103,306

Underlying: Class A Ordinary Shares · 103,306 shares

Expires 2029-11-05

F2 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 34,436 vest on November 5, 2020; 34,435 vest on November 5, 2021 and 34,435 vest on November, 2022.

SEC source: 0001562180-19-005396 · primarydocument.xml · nonDerivative · entry 1

McMurray Michael C. · CIK 0001556386 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,108

F1 · balance_after: Includes 23,108 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 7,704 granted on November 5, 2019 that vest on November 5, 2020; 7,702 granted on November 5, 2019 that vest on November 5, 2021 and 7,702 granted on November 5, 2019 that vest on November 5, 2022.

SEC source: 0001562180-19-005067 · primarydocument.xml · nonDerivative · entry 1

Hanley Michael Sean · CIK 0001760238 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,573

F1 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · balance_after: Includes 3,111 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 914 granted on November 30, 2018 that vest on November 30, 2019 and 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-005064 · primarydocument.xml · nonDerivative · entry 2

Buchanan Robin W.T. · CIK 0001519805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,342.573

F2 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-005064 · primarydocument.xml · nonDerivative · entry 1

Buchanan Robin W.T. · CIK 0001519805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,863.573

F1 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-005065 · primarydocument.xml · nonDerivative · entry 2

DICCIANI NANCE K · CIK 0001198097 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,783.612

F2 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-005065 · primarydocument.xml · nonDerivative · entry 1

DICCIANI NANCE K · CIK 0001198097 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,250.612

F1 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-005066 · primarydocument.xml · nonDerivative · entry 2

FARLEY CLAIRE S · CIK 0001204506 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,223

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-005066 · primarydocument.xml · nonDerivative · entry 1

FARLEY CLAIRE S · CIK 0001204506 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,260

F1 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for her annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-005063 · primarydocument.xml · nonDerivative · entry 1

Cooper Stephen Forbes · CIK 0001335032 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,437

F1 · kind: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F1 · shares: Prior to the beginning of the year, the reporting person elected to receive common stock in lieu of cash for his annual retainer, which retainer is paid in quarterly installments. The number of shares issued was calculated based on $81.54, which is the average of the daily closing prices of the issuer's shares over the applicable quarter.

F2 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-22-001424 · primarydocument.xml · nonDerivative · entry 3

Buchanan Robin W.T. · CIK 0001519805 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,127.465

F1 · security: This Form 4 is being filed late due to inadvertent administrative error. The Reporting Person has agreed to voluntarily disgorge to the Issuer all short-swing profits realized by the Reporting Person from relevant transactions.

F2 · shares: Represents shares accumulated through inadvertent automatic dividend reinvestment in reporting person's personal brokerage account, contrary to written directions provided to the financial institution by reporting person.

F3 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 1,531 granted on May 27, 2021 that vest on May 27, 2022.

SEC source: 0000899243-19-022684 · 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: Direct

Disclosed balance after: 5,864,501

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.00 to $75.00, 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: 0000899243-19-022684 · 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: Direct

Disclosed balance after: 5,214,864

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.90 to $73.995, 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: 0001562180-19-004629 · primarydocument.xml · nonDerivative · entry 6

Augustowski Paul A · CIK 0001697502 · SVP, O&P - Americas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,133

F7 · shares: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 382 shares of restricted stock units granted to the reporting person on February 21, 2019.

SEC source: 0001562180-19-004629 · primarydocument.xml · nonDerivative · entry 5

Augustowski Paul A · CIK 0001697502 · SVP, O&P - Americas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,227

F6 · shares: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 1,130 shares of restricted stock units granted to the reporting person on February 16, 2017.

SEC source: 0001562180-19-004629 · primarydocument.xml · nonDerivative · entry 4

Augustowski Paul A · CIK 0001697502 · SVP, O&P - Americas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,503

F5 · shares: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the pro-rata vesting of 711 shares of restricted stock units granted to the reporting person on February 21, 2018.

SEC source: 0001562180-19-004629 · primarydocument.xml · nonDerivative · entry 3

Augustowski Paul A · CIK 0001697502 · SVP, O&P - Americas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,677

F4 · shares: The reporting person's employment with the company ended on September 2, 2019 and, pursuant to the terms of his restricted stock unit award, forfeited the 141 shares reported on this Form 4.

F2 · price: Price is not applicable.

SEC source: 0001562180-19-004629 · primarydocument.xml · nonDerivative · entry 2

Augustowski Paul A · CIK 0001697502 · SVP, O&P - Americas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,818

F3 · shares: The reporting person's employment with the company ended on September 2, 2019 and, pursuant to the terms of his restricted stock unit award, forfeited the 1,333 shares reported on this Form 4.

F2 · price: Price is not applicable.

SEC source: 0001562180-19-004629 · primarydocument.xml · nonDerivative · entry 1

Augustowski Paul A · CIK 0001697502 · SVP, O&P - Americas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,151

F1 · shares: The reporting person's employment with the company ended on September 2, 2019 and, pursuant to the terms of his restricted stock unit award, forfeited the 568 shares reported on this Form 4.

F2 · price: Price is not applicable.

SEC source: 0000899243-19-022684 · 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: 5,198,583

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.63 to $75.00, 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: 0001562180-19-004486 · primarydocument.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Family Trust

Disclosed balance after: 195,375

F1 · shares: Represents shares purchased by the reporting person's family trust on August 23, 2019.

F2 · balance_after: Represents shares held by the reporting person's family trust including 57,511 shares transferred to the trust on March 13, 2019.

SEC source: 0001562180-19-004377 · 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: 1,272

Underlying: Class A Ordinary Shares · 1,272 shares

Expires 2029-08-15

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 August 15, 2019.

SEC source: 0001562180-19-004377 · 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: 11,974

F1 · balance_after: Includes 3,537 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 464 granted on February 16, 2017 that vest on February 16, 2020; 472 granted on February 21, 2018 that vest on February 21, 2021; 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 and 210 granted on August 15, 2019 that vest on August 15, 2022.

SEC source: 0001562180-19-004275 · primarydocument.xml · nonDerivative · entry 1

Bindra Jagjeet S. · CIK 0001490079 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,529

F1 · balance_after: Includes restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,197 granted on May 30, 2019 that vest on May 30, 2020.

SEC source: 0001562180-19-004026 · primarydocument.xml · nonDerivative · entry 1

Smiley Jacinth C · CIK 0001735999 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,111

F1 · balance_after: Includes 5,111 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; 1,168 granted on July 18, 2019 that vest July 18, 2020; 1,166 granted on July 18, 2019 that vest on July 18, 2021 and 1,166 granted on July 18, 2019 that vest on July 18, 2022.

SEC source: 0001562180-19-003979 · primarydocument.xml · derivative · entry 3

Rhenman Torkel · CIK 0001780174 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,999

Underlying: Class A Ordinary Shares · 15,999 shares

Expires 2029-07-15

F3 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 5,333 vest on July 15, 2020, 5,333 vest on July 15, 2021 and 5,333 vest on July 15, 2022.

SEC source: 0001562180-19-003979 · primarydocument.xml · nonDerivative · entry 2

Rhenman Torkel · CIK 0001780174 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,791

F2 · balance_after: Includes 10,291 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, 2020; 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 and 2,722 granted on July 15, 2019 that vest on July 15, 2022.

SEC source: 0001562180-19-003979 · primarydocument.xml · nonDerivative · entry 1

Rhenman Torkel · CIK 0001780174 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,222

F1 · balance_after: Includes 2,722 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on July 15, 2022.

SEC source: 0001562180-19-003978 · primarydocument.xml · derivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,346

Underlying: Class A Ordinary Shares · 14,346 shares

Expires 2029-07-15

F3 · derivative.exercise_date: Granted pursuant to the issuer's long-term incentive plan. Award vests as follows: 4,782 vest on July 15, 2020; 4,782 vest on July 15, 2021 and 4,782 vest on July 15, 2022.

SEC source: 0001562180-19-003978 · primarydocument.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,119

F2 · balance_after: Includes 19,326 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 5,629 granted on July 15, 2019 that vest on July 15, 2020; 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 and 2,441 granted on July 15, 2019 that vest on July 15, 2022.