Capital Research reports 3.9% stake in GPGI

GPGI, Inc. ownership update: Capital Research Global Investors reports beneficial ownership of 11,260,713 shares, representing 3.9% of the outstanding common stock.

Rhea-AI Filing Summary

GPGI, Inc. ownership update: Capital Research Global Investors reports beneficial ownership of 11,260,713 shares, representing 3.9% of the outstanding common stock. The filing identifies sole voting and dispositive power over the reported shares and is signed by a Capital Research officer.

Insights

Institutional Ownership Analyst

Large asset manager discloses a passive sub-5% stake.

Capital Research Global Investors reports beneficial ownership of 3.9% (11,260,713 shares) in GPGI, Inc.. The filing follows Schedule 13G/A conventions for large institutional holders and shows sole voting and dispositive authority for the disclosed shares.

Implications are factual and routine: this level of ownership is publicly reportable but below control thresholds. Subsequent filings would show any material changes in percentage or voting arrangements.

Key Figures

Beneficially owned shares: 11,260,713 shares Percent of class: 3.9% Shares believed outstanding: 289,642,587 shares +1 more

4 metrics

Beneficially owned shares 11,260,713 shares reported beneficial ownership

Percent of class 3.9% percentage of outstanding common stock

Shares believed outstanding 289,642,587 shares used to calculate ownership percentage

Filing signature date 05/11/2026 signature on Schedule 13G/A

Key Terms

Schedule 13G/A, Beneficial ownership, CUSIP

3 terms

Schedule 13G/A regulatory

"Capital Research Global Investors reports beneficial owner on Schedule 13G/A"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership financial

"CRGI is deemed to be the beneficial owner of 11,260,713 shares"

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.

CUSIP financial

"CUSIP No.: 20459V105 listed for the Common Stock"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

FAQ

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

What stake does Capital Research Global Investors report in GPGI (CMPO)?

Capital Research Global Investors reports beneficial ownership of 11,260,713 shares, equal to 3.9% of GPGI's common stock. The filing states sole voting and dispositive power over these shares and is signed on 05/11/2026.

What does 3.9% ownership reported on a Schedule 13G/A mean for CMPO shareholders?

A 3.9% position signals an institutional stake below typical control levels. It reflects beneficial ownership reporting by an asset manager and does not, by itself, change company governance or control.

Who has voting and dispositive power over the reported CMPO shares?

The filing states that Capital Research Global Investors has sole voting and sole dispositive power over all 11,260,713 shares reported, with no shared voting or dispositive power disclosed in the Schedule 13G/A.

How many GPGI shares are outstanding per the filing?

The filing references 289,642,587 shares believed to be outstanding and calculates Capital Research's 3.9% stake against that figure. The outstanding-share count appears in the ownership disclosure.

Who signed the Schedule 13G/A for Capital Research Global Investors?

The Schedule 13G/A is signed by Jae Won Chung, Vice President and Senior Counsel II of Capital Research and Management Company, dated 05/11/2026.

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

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Accepted by SEC EDGAR 05/14/2026 - 10:19 AM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

GPGI, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

20459V105

(CUSIP Number)

03/31/2026

(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): 20459V105

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 11,260,713.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 11,260,713.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

11,260,713.00

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)

3.9 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: GPGI, Inc.
(b)	Address of issuer's principal executive offices: 309 Pierce Street, Somerset, NJ 08873
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.: 20459V105
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: 11,260,713 ** **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 11,260,713 shares or 3.9% of the 289,642,587 shares believed to be outstanding.
(b)	Percent of class: 3.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 11,260,713
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 11,260,713
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	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:	05/11/2026