[SCHEDULE 13G] Smurfit Westrock plc SEC Filing

Rhea-AI Filing Summary

Capital Research Global Investors (CRGI) reports beneficial ownership of 27,671,873 shares of Smurfit Westrock plc common stock, equal to 5.3% of the 522,012,629 shares the filer believes to be outstanding. The filing states CRGI has sole voting power and sole dispositive power over all 27,671,873 shares and shared voting/dispositive power of 0.

CRGI is identified as a division of Capital Research and Management Company and affiliated investment management entities that provide services under the Capital Research Global Investors name. The filing includes a certification that the securities are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

Positive

• Material institutional stake: CRGI beneficially owns 27,671,873 shares (5.3%), a disclosure-significant position
• Sole voting and dispositive power: CRGI reports exclusive control over voting and disposition of the reported shares

Negative

• None.

Insights

Securities Analyst

TL;DR: Institutional passive stake of 5.3% with sole voting/dispositive power; filing indicates ordinary-course, non-control intent.

The filing documents a material institutional position: 27,671,873 shares (5.3%) of Smurfit Westrock plc. As a Schedule 13G, the submission indicates CRGI is reporting as an investment adviser with a passive intent rather than an activist or control-seeking investor. Notably, CRGI reports sole voting and dispositive power over the entire position, which means the entity controls voting and sale decisions for the stake. For market participants, this is an informative disclosure of ownership concentration but, standing alone, does not signal a change in corporate control or a planned activist campaign.

Corporate Governance Expert

TL;DR: A 5.3% passive holding under one manager can influence close shareholder votes but the filing certifies no intent to change control.

The report names CRGI and affiliated investment management entities as the beneficial owner and classifies the filer as an investment adviser (IA). The combination of a material stake and sole voting power means CRGI will cast votes for this block, which can be consequential in contested or close governance matters. However, the certification in the filing states the shares are held in the ordinary course of business and not to influence control, consistent with a passive Schedule 13G disclosure. From a governance perspective, the disclosure increases transparency about a significant shareholder who will exercise voting rights through a single manager.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Smurfit Westrock PLC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

G8267P108

(CUSIP Number)

06/30/2025

(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)

SCHEDULE 13G

CUSIP No. 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 27,671,873.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 27,671,873.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

27,671,873.00

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)

5.3 %

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: 27,671,873 ** **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 27,671,873 shares or 5.3% of the 522,012,629 shares believed to be outstanding.
(b)	Percent of class: 5.3 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 27,671,873
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 27,671,873
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
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:	Vice President and Senior Counsel II, Capital Research and Management Company
Date:	08/05/2025

FAQ

How many Smurfit Westrock (SW) shares does Capital Research Global Investors own?

CRGI beneficially owns 27,671,873 shares of Smurfit Westrock common stock.

What percentage of Smurfit Westrock does CRGI hold?

The filing reports CRGI holds 5.3% of the 522,012,629 shares the filer believes to be outstanding.

Does CRGI have voting power over the shares?

Yes. The filing reports CRGI has sole voting power and sole dispositive power for all 27,671,873 shares; shared powers are reported as 0.

Is this filing indicative of an activist or control-seeking intent?

No. CRGI filed a Schedule 13G and included a certification that the securities are held in the ordinary course of business and not to change or influence control, consistent with passive investor reporting.

Who is the reporting entity for this Schedule 13G?

The reporting person is Capital Research Global Investors, a division of Capital Research and Management Company and affiliated investment management entities.