Smurfit Westrock (SW): Capital Research Global Investors reports 8.1% stake

Rhea-AI Filing Summary

Smurfit Westrock plc received an updated ownership report indicating that Capital Research Global Investors is the beneficial owner of 42,655,360 shares of its common stock. This position represents 8.1% of the 524,514,988 shares that Capital Research Global Investors believes are outstanding as of June 30, 2026.

Capital Research Global Investors, a division of Capital Research and Management Company and related investment management entities, reports sole voting power over 42,648,917 shares and sole dispositive power over 42,655,360 shares, with no shared voting or dispositive power.

Key Figures

Shares beneficially owned: 42,655,360 shares Percent of class: 8.1% Shares believed outstanding: 524,514,988 shares +2 more

5 metrics

Shares beneficially owned 42,655,360 shares Common stock beneficially owned by Capital Research Global Investors

Percent of class 8.1% Portion of Smurfit Westrock plc common stock class held by Capital Research Global Investors

Shares believed outstanding 524,514,988 shares Total Smurfit Westrock plc common shares believed to be outstanding

Sole voting power 42,648,917 shares Shares over which Capital Research Global Investors has sole voting power

Sole dispositive power 42,655,360 shares Shares over which Capital Research Global Investors has sole dispositive power

Key Terms

beneficial owner, sole voting power, sole dispositive power, Schedule 13G

4 terms

beneficial owner financial

"CRGI is deemed to be the beneficial owner of 42,655,360 shares"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

sole voting power financial

"Sole Voting Power 42,648,917.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"Sole Dispositive Power 42,655,360.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Schedule 13G regulatory

"CRGI is deemed to be the beneficial owner... in this Schedule 13G/A"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

What ownership stake in Smurfit Westrock plc (SW) does Capital Research Global Investors report?

Capital Research Global Investors reports beneficial ownership of 42,655,360 Smurfit Westrock plc common shares. This accounts for 8.1% of the 524,514,988 shares it believes are outstanding, based on information as of June 30, 2026.

How much voting power does Capital Research Global Investors have in Smurfit Westrock plc (SW)?

Capital Research Global Investors reports sole voting power over 42,648,917 Smurfit Westrock plc shares. It indicates no shared voting power, meaning all reported voting authority is held on a sole basis for those shares.

What is the total share count underlying the 8.1% ownership in Smurfit Westrock plc (SW)?

The 8.1% ownership reported by Capital Research Global Investors is based on 524,514,988 Smurfit Westrock plc shares. It states it is deemed beneficial owner of 42,655,360 of those believed-to-be-outstanding shares.

Does Capital Research Global Investors share dispositive power over Smurfit Westrock plc (SW) shares?

Capital Research Global Investors reports sole dispositive power over 42,655,360 Smurfit Westrock plc shares. It reports no shared dispositive power, indicating exclusive authority to dispose of or direct the disposition of these shares.

Who signed the Schedule 13G/A filing for Smurfit Westrock plc (SW) on behalf of Capital Research Global Investors?

The filing is signed by Jae Won Chung, identified as Senior Vice President and Associate General Counsel of Capital Research and Management Company. The signature date on the filing is August 11, 2026.

What is the class of securities reported in the Smurfit Westrock plc (SW) Schedule 13G/A?

The Schedule 13G/A relates to Smurfit Westrock plc Common Stock. The securities are identified with CUSIP number G8267P108, and Capital Research Global Investors reports its beneficial ownership and related voting and dispositive powers for this class.

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Available on EDGAR 08/12/2026 - 05:08 PM Accepted by SEC EDGAR 08/12/2026 - 05:08 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Smurfit Westrock plc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

G8267P108

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G8267P108

1

Names of Reporting Persons

Capital Research Global Investors

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 42,648,917.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 42,655,360.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

42,655,360.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.1 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Smurfit Westrock plc
(b)	Address of issuer's principal executive offices: BEECH HILL, CLONSKEAGH,, DUBLIN D04 N2R2, Ireland
Item 2.
(a)	Name of person filing: Capital Research Global Investors
(b)	Address or principal business office or, if none, residence: 333 South Hope Street, 55th Fl, Los Angeles, CA 90071
(c)	Citizenship: N/A
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: G8267P108
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 42,655,360 ** **Capital Research Global Investors ("CRGI") is a division of Capital Research and Management Company ("CRMC"), as well as its investment management subsidiaries and affiliates Capital Bank and Trust Company, Capital International, Inc., Capital International Limited, Capital International Sarl, Capital International K.K., Capital Group Private Client Services, Inc., and Capital Group Investment Management Private Limited (together with CRMC, the "investment management entities"). CRGI's divisions of each of the investment management entities collectively provide investment management services under the name "Capital Research Global Investors." CRGI is deemed to be the beneficial owner of 42,655,360 shares or 8.1% of the 524,514,988 shares believed to be outstanding.
(b)	Percent of class: 8.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 42,648,917
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 42,655,360
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

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.

Capital Research Global Investors

Signature:	Jae Won Chung
Name/Title:	Senior Vice President and Associate General Counsel, Capital Research and Management Company
Date:	08/11/2026