LyondellBasell holders report 19.6% stake after transfers

The reported 63,435,504-share position is attributed to five direct holders, while several reporting persons share voting and investment powers.

Available on EDGAR 11/05/2026 - 04:45 PM EST Accepted by SEC EDGAR 11/05/2026 - 04:44 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

For LyondellBasell Industries N.V. (LYB), reporting persons disclosed an internal reorganization involving ordinary shares on November 3, 2026. AI European Holdings L.P. distributed 4,000,000 shares pro rata and for no consideration to Access Industries, LLC and Access Industries Holdings LLC, which then contributed those shares to Access Industries Core Holdings LLC. AI European Holdings also contributed 12,000,000 shares to LYB Holdco, and Access Industries Core Holdings donated 1,000,000 shares to a charitable foundation.

The reporting persons reported aggregate beneficial ownership of 63,435,504 shares, or 19.6% of the class, based on 323,242,496 ordinary shares issued and outstanding as of October 28, 2026. Direct holdings listed include 53,195,179 shares at LYB Holdco, 4,000,000 at Access Industries Core Holdings, 5,270,918 at AI Chemical Holdings, 765,154 at AI Investments Holdings and 204,253 at AILEB. Several reporting persons may be deemed to share voting and investment power over shares held by these entities.

Key Figures

Aggregate beneficial ownership: 63,435,504 ordinary shares Class ownership: 19.6% Ordinary shares outstanding: 323,242,496 ordinary shares +3 more

6 metrics

Aggregate beneficial ownership 63,435,504 ordinary shares Reported by the reporting persons

Class ownership 19.6% Percentage represented by aggregate beneficial ownership

Ordinary shares outstanding 323,242,496 ordinary shares As of October 28, 2026

Contribution to LYB Holdco 12,000,000 ordinary shares Contributed by AI European Holdings L.P. on November 3, 2026

Shares contributed to Access Industries Core Holdings 4,000,000 ordinary shares Distributed by AI European Holdings L.P. to its partners, then contributed to their subsidiary, on November 3, 2026

Charitable donation 1,000,000 ordinary shares Donated by Access Industries Core Holdings on November 3, 2026

Key Terms

beneficial ownership, shared voting power, dispositive power, pro rata

4 terms

beneficial ownership regulatory

"disclaims beneficial ownership of the shares held directly by LYB Holdco"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

shared voting power regulatory

"Shared Voting Power 63,435,504.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

dispositive power regulatory

"sole or shared power to dispose of"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

pro rata financial

"distributed 4,000,000 ordinary shares to its partners pro rata and for no consideration"

Pro rata means dividing or distributing something proportionally based on a specific factor, such as ownership or contribution. For example, if an investor owns 10% of a company, they would receive 10% of any dividends or benefits allocated. This approach ensures everyone gets their fair share relative to their stake or input, helping investors understand how benefits, costs, or responsibilities are fairly shared.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many LYB shares do the reporting persons beneficially own?

The reporting persons state aggregate beneficial ownership of 63,435,504 ordinary shares, or 19.6% of the class. The percentage is based on 323,242,496 ordinary shares issued and outstanding as of October 28, 2026.

What LYB share transactions occurred on November 3, 2026?

AI European Holdings L.P. distributed 4,000,000 ordinary shares pro rata and for no consideration to Access Industries, LLC and Access Industries Holdings LLC, which contributed them to Access Industries Core Holdings LLC. AI European Holdings also contributed 12,000,000 shares to LYB Holdco, and Access Industries Core Holdings donated 1,000,000 shares to a charitable foundation.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 21)

LyondellBasell Industries N.V.

(Name of Issuer)

Ordinary shares, par value Euro 0.04 per share

(Title of Class of Securities)

N53745100

(CUSIP Number)

Alejandro Moreno
c/o Access Industries, Inc., 40 West 57th Street, 28th Floor
New York, NY, 10019
(212) 247-6400

Langhorne S. Perrow
c/o Access Industries, Inc., 40 West 57th Street, 28th Floor
New York, NY, 10019
(212) 247-6400

Nicholas P. Pellicani
Debevoise & Plimpton LLP, The Northcliffe, 28 Tudor St.
London, X0, EC4Y 0AY
44 20 7786 9000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

11/03/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): N53745100

1

Name of reporting person

LYB Holdco LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

LUXEMBOURG

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 53,195,179.00
8	Shared Voting Power 10,240,325.00
9	Sole Dispositive Power 53,195,179.00
10	Shared Dispositive Power 10,240,325.00

11

Aggregate amount beneficially owned by each reporting person

63,435,504.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

19.6 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

All percentages are based on an aggregate of 323,242,496 ordinary shares issued and outstanding as of October 28, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2026, filed by the Issuer on October 30, 2026.

SCHEDULE 13D

CUSIP Number(s): N53745100

1

Name of reporting person

Access Industries, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 63,435,504.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 63,435,504.00

11

Aggregate amount beneficially owned by each reporting person

63,435,504.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

19.6 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

All percentages are based on an aggregate of 323,242,496 ordinary shares issued and outstanding as of October 28, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2026, filed by the Issuer on October 30, 2026.

SCHEDULE 13D

CUSIP Number(s): N53745100

1

Name of reporting person

Access Industries Holdings LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 63,435,504.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 63,435,504.00

11

Aggregate amount beneficially owned by each reporting person

63,435,504.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

19.6 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

All percentages are based on an aggregate of 323,242,496 ordinary shares issued and outstanding as of October 28, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2026, filed by the Issuer on October 30, 2026.

SCHEDULE 13D

CUSIP Number(s): N53745100

1

Name of reporting person

Access Industries Management, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 63,435,504.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 63,435,504.00

11

Aggregate amount beneficially owned by each reporting person

63,435,504.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

19.6 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

All percentages are based on an aggregate of 323,242,496 ordinary shares issued and outstanding as of October 28, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2026, filed by the Issuer on October 30, 2026.

SCHEDULE 13D

CUSIP Number(s): N53745100

1

Name of reporting person

AI Investments Holdings LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 765,154.00
8	Shared Voting Power 62,670,350.00
9	Sole Dispositive Power 765,154.00
10	Shared Dispositive Power 62,670,350.00

11

Aggregate amount beneficially owned by each reporting person

63,435,504.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

19.6 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

All percentages are based on an aggregate of 323,242,496 ordinary shares issued and outstanding as of October 28, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2026, filed by the Issuer on October 30, 2026.

SCHEDULE 13D

CUSIP Number(s): N53745100

1

Name of reporting person

Len Blavatnik

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 63,435,504.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 63,435,504.00

11

Aggregate amount beneficially owned by each reporting person

63,435,504.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

19.6 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

All percentages are based on an aggregate of 323,242,496 ordinary shares issued and outstanding as of October 28, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2026, filed by the Issuer on October 30, 2026.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Ordinary shares, par value Euro 0.04 per share
(b)	Name of Issuer: LyondellBasell Industries N.V.
(c)	Address of Issuer's Principal Executive Offices: 2800 Post Oak Boulevard, Suite 5100, Houston, TEXAS , 77056.
Item 1 Comment: This amendment to Schedule 13D is being filed by LYB Holdco LLC ("LYB Holdco"), Len Blavatnik, Access Industries, LLC, Access Industries Holdings LLC, Access Industries Management, LLC and AI Investments Holdings LLC ("AIIH") (collectively, the "Reporting Persons", and each, a "Reporting Person") to report changes in beneficial ownership of the Reporting Persons in the ordinary shares of LyondellBasell Industries N.V. (the "Issuer"). The Schedule 13D (the "Schedule") filed with the Securities and Exchange Commission on January 10, 2011, as amended and supplemented by Amendment No. 1, filed on February 23, 2011, Amendment No. 2, filed on February 16, 2012, Amendment No. 3, filed on December 17, 2012, Amendment No. 4, filed on August 5, 2013, Amendment No. 5, filed on December 31, 2014, Amendment No. 6, filed on June 10, 2015, Amendment No. 7, filed on March 17, 2016, Amendment No. 8, filed on February 6, 2017, Amendment No. 9, filed on February 14, 2017, Amendment No. 10, filed on January 8, 2018, Amendment No. 11, filed on November 14, 2018, Amendment No. 12, filed on July 15, 2019, Amendment No. 13, filed on November 8, 2019, Amendment No. 14 filed on February 18, 2021, Amendment No. 15 filed on May 6, 2021, Amendment No. 16 filed on November 17, 2022, Amendment No. 17 filed on November 21, 2022, Amendment No. 18 filed on August 10, 2023, Amendment No. 19 filed on June 11, 2025 and Amendment No. 20 filed on June 13, 2025 is hereby amended and supplemented by the Reporting Persons as set forth below in this Amendment No. 21. This amendment is filed by the Reporting Persons in accordance with Rule 13d-2 of the Securities Exchange Act of 1934, as amended, and refers only to information that has materially changed since the filing of the Schedule 13D. The items identified below, or the particular paragraphs of such items which are identified below, are amended as set forth below. Unless otherwise indicated, all capitalized terms used and not defined herein have the respective meanings assigned to them in the Schedule.
Item 4.	Purpose of Transaction
	The information set forth in Item 5(c) of this amendment to Schedule 13D is incorporated herein by reference.
Item 5.	Interest in Securities of the Issuer
(a)	The disclosure in Item 5(a) is hereby amended and restated in its entirety to read as follows: The responses of each of the Reporting Persons with respect to Rows 11, 12, and 13 of the cover pages of this Schedule 13D that relate to the aggregate number and percentage of ordinary shares (including, but not limited to, footnotes to such information) are incorporated herein by reference. The responses of each of the Reporting Persons with respect to Rows 7, 8, 9, and 10 of the cover pages of this Schedule 13D that relate to the number of ordinary shares as to which each of the persons or entities referenced in Item 2 above has sole or shared power to vote or to direct the vote of and sole or shared power to dispose of or to direct the disposition of (including, but not limited to, footnotes to such information) are incorporated herein by reference. The 63,435,504 ordinary shares reported in this Schedule 13D include (i) 53,195,179 ordinary shares owned directly by LYB Holdco, (ii) 4,000,000 ordinary shares owned directly by Access Industries Core Holdings LLC (formerly AIPH Holdings LLC) ("AICH"), (iii) 5,270,918 ordinary shares owned directly by AI Chemical Holdings LLC, (iv) 765,154 ordinary shares owned directly by AIIH, and (v) 204,253 ordinary shares owned directly by AILEB LLC (formerly AI Altep Investments LLC). Each of AIIH, Access Industries, LLC, Access Industries Holdings LLC, Access Industries Management, LLC and Len Blavatnik may be deemed to beneficially own, and share investment and voting power over, the ordinary shares held directly by LYB Holdco because (i) Mr. Blavatnik controls Access Industries Management, LLC and a majority of the outstanding voting interests in Access Industries, LLC, (ii) Access Industries Management, LLC controls Access Industries, LLC, Access Industries Holdings LLC and AIIH, which controls a majority of the outstanding voting interests in LYB Holdco, and (iii) Access Industries Holdings LLC controls a majority of the outstanding voting interests in AIIH. Each of the Reporting Persons and each of their affiliated entities and the officers, partners, members, and managers thereof, other than LYB Holdco, disclaims beneficial ownership of the shares held directly by LYB Holdco. Each of Access Industries, LLC, Access Industries Holdings LLC, Access Industries Management, LLC and Len Blavatnik may be deemed to beneficially own and share voting and investment power over the ordinary shares held directly by AICH because (i) Access Industries Holdings LLC controls a majority of the outstanding voting interests in AICH, (ii) Access Industries, LLC controls a majority of the outstanding voting interests in Access Industries Holdings LLC, (iii) Access Industries Management, LLC controls Access Industries, LLC, Access Industries Holdings LLC and AICH, and (iv) Mr. Blavatnik controls Access Industries Management, LLC and a majority of the outstanding voting interests in Access Industries, LLC. Because of its relationships with the other Reporting Persons, LYB Holdco may be deemed to share investment and voting power over the ordinary shares held directly by AICH. Each of the Reporting Persons and each of their affiliated entities and the officers, partners, members, and managers thereof, other than AICH, disclaims beneficial ownership of the ordinary shares held directly by AICH. Len Blavatnik may be deemed to beneficially own, and share investment and voting power over, the ordinary shares held directly by AILEB LLC because (i) he controls AI Altep Holdings, Inc. and (ii) AI Altep Holdings, Inc. owns all of the membership interests in AILEB LLC. Each of the Reporting Persons, and each of their affiliated entities and the officers, partners, members, and managers thereof, other than AILEB LLC, disclaims beneficial ownership of the ordinary shares held directly by AILEB LLC. Each of Access Industries Management, LLC, Access Industries Holdings LLC and Len Blavatnik may be deemed to beneficially own and share voting and investment power over the ordinary shares held directly by AI Chemical Holdings LLC because (i) Mr. Blavatnik controls Access Industries Management, LLC, (ii) Access Industries Holdings LLC owns a majority of the membership interests in RSB 2 Limited, which is the sole member of AI Chemical Holdings LLC, and (iii) Access Industries Management, LLC controls AI Chemical Holdings LLC. Because of their relationships with the other Reporting Persons, each of LYB Holdco and Access Industries, LLC may be deemed to share investment and voting power over the ordinary shares held directly by AI Chemical Holdings LLC. Each of the Reporting Persons, and each of their affiliated entities and the officers, partners, members, and managers thereof, other than AI Chemical Holdings LLC, disclaims beneficial ownership of the shares held by AI Chemical Holdings LLC. Each of Access Industries, LLC, Access Industries Holdings LLC, Access Industries Management, LLC and Len Blavatnik may be deemed to beneficially own, and share investment and voting power over, the ordinary shares held directly by AIIH because (i) Access Industries Holdings LLC controls a majority of the outstanding voting interests in AIIH, (ii) Access Industries, LLC controls a majority of the outstanding voting interests in Access Industries Holdings LLC, (iii) Access Industries Management, LLC controls Access Industries, LLC, Access Industries Holdings LLC and AIIH, and (iv) Mr. Blavatnik controls Access Industries Management, LLC and a majority of the outstanding voting interests in Access Industries, LLC. Each of the Reporting Persons and each of their affiliated entities and the officers, partners, members, and managers thereof, other than AIIH, disclaims beneficial ownership of the ordinary shares held directly by AIIH.
(b)	In addition to the description set forth above in Item 5(a), see the cover pages of this Schedule 13D for a description of the respective voting powers and disposition powers of the Reporting Persons.
(c)	The disclosure in Item 5(c) is hereby supplemented by adding the following at the end thereof: (c) The following transactions in the Issuer's securities have been effected by Reporting Persons within the 60 days prior to this filing: On November 3, 2026, pursuant to an internal reorganization, (i) AI European Holdings L.P. ("AIEH") distributed 4,000,000 ordinary shares to its partners Access Industries, LLC and Access Industries Holdings LLC, pro rata and for no consideration, which then contributed such shares to their subsidiary, AICH, and (ii) AIEH contributed 12,000,000 ordinary shares to its indirect subsidiary, LYB Holdco. In addition, on November 3, 2026, AICH donated 1,000,000 ordinary shares to a charitable foundation.
Item 7.	Material to be Filed as Exhibits.
	99.1.21 Joint Filing Agreement, dated as of November 5, 2026, by and among the Reporting Persons

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

LYB Holdco LLC

Signature:	/s/ Alejandro Moreno
Name/Title:	By: Access Industries Management, LLC, its Manager; its Executive Vice President/Alejandro Moreno
Date:	11/05/2026

Access Industries, LLC

Signature:	/s/ Alejandro Moreno
Name/Title:	By: Access Industries Management, LLC, its Manager; its Executive Vice President/Alejandro Moreno
Date:	11/05/2026

Access Industries Holdings LLC

Signature:	/s/ Alejandro Moreno
Name/Title:	By: Access Industries Management, LLC, its Manager; its Executive Vice President/Alejandro Moreno
Date:	11/05/2026

Access Industries Management, LLC

Signature:	/s/ Alejandro Moreno
Name/Title:	By: Executive Vice President/Alejandro Moreno
Date:	11/05/2026

AI Investments Holdings LLC

Signature:	/s/ Alejandro Moreno
Name/Title:	By: Access Industries Management, LLC, its Manager; its Executive Vice President/Alejandro Moreno
Date:	11/05/2026

Len Blavatnik

Signature:	*/s/Alejandro Moreno
Name/Title:	By: Alejandro Moreno/Attorney-in-Fact
Date:	11/05/2026

Comments accompanying signature:

* The undersigned, by signing his name hereto, executes this Schedule 13D pursuant to the Power of Attorney executed on behalf of Mr. Blavatnik and filed herewith.