FMR LLC reports 39.55M shares of GPGI Inc. (CMPO) — 13.7% stake

Rhea-AI Filing Summary

FMR LLC filed an amendment to Schedule 13G reporting beneficial ownership of 39,551,932.38 shares of GPGI Inc. Class A common stock, equal to 13.7% of the class. The filing lists sole dispositive power of 39,551,932.38 shares and sole voting power of 36,647,259.86 shares for FMR LLC. The cover also shows Abigail P. Johnson with dispositive power over 39,551,932.38 shares. The filing cites a power of attorney and references Exhibit 99 and Exhibit 24 for related agreements and authority.

Insights

Institutional Ownership Analyst

FMR LLC reports a significant passive stake in GPGI Inc., holding 13.7% of Class A shares.

FMR LLC reports beneficial ownership of 39,551,932.38 shares with sole dispositive power and substantial sole voting power, consistent with an institutional investor filing a Schedule 13G/A. The filing references a power of attorney and attached exhibits for subsidiary/agency details.

Cash‑flow treatment and trading intentions are not included in the excerpt; subsequent exhibit disclosures cited may show the underlying allocation among funds or subsidiaries. Future filings may provide further allocation or role clarifications.

Key Figures

Beneficial ownership: 39,551,932.38 shares Percent of class: 13.7% FMR sole voting power: 36,647,259.86 shares +3 more

6 metrics

Beneficial ownership 39,551,932.38 shares Amount beneficially owned reported on Schedule 13G/A

Percent of class 13.7% Percent of Class A common stock reported

FMR sole voting power 36,647,259.86 shares Sole power to vote as listed on cover page

FMR sole dispositive power 39,551,932.38 shares Sole power to dispose as listed on cover page

CUSIP 20459V105 CUSIP for Class A common stock

Reporting date (cover line) 03/31/2026 Date shown on the cover line of the filing

Key Terms

Schedule 13G/A, Beneficial ownership, Sole dispositive power, Power of Attorney

4 terms

Schedule 13G/A regulatory

"Amendment to Schedule 13G filing reporting beneficial ownership"

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

"Amount beneficially owned: 39551932.38"

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.

Sole dispositive power regulatory

"Sole Dispositive Power 39,551,932.38"

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.

Power of Attorney legal

"Duly authorized under Power of Attorney effective as of April 13, 2026"

A power of attorney is a legal document that allows one person to make decisions and act on behalf of another person, often in financial or legal matters. It’s like giving someone a trusted helper or agent the authority to handle important tasks if you are unable to do so yourself. This matters to investors because it can impact how their assets are managed or transferred if they become unable to oversee their affairs.

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)

CLASS A 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

FMR LLC

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 36,647,259.86
6	Shared Voting Power 0.00
7	Sole Dispositive Power 39,551,932.38
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

39,551,932.38

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)

13.7 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 20459V105

1

Names of Reporting Persons

Abigail P. Johnson

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 39,551,932.38
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

39,551,932.38

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)

13.7 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: GPGI INC
(b)	Address of issuer's principal executive offices: 309 PIERCE STREET,SOMERSET,NJ,US,08873
Item 2.
(a)	Name of person filing: FMR LLC
(b)	Address or principal business office or, if none, residence: 245 Summer Street, Boston, Massachusetts 02210
(c)	Citizenship: Not applicable
(d)	Title of class of securities: CLASS A 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: 39551932.38
(b)	Percent of class: 13.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Please see the responses to Items 5 and 6 on the cover page.
	(ii) Shared power to vote or to direct the vote: 0.00
	(iii) Sole power to dispose or to direct the disposition of: 39551932.38
	(iv) Shared power to dispose or to direct the disposition of: 0.00
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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. One or more other persons are known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the CLASS A COMMON STOCK of GPGI INC. No one other person's interest in the CLASS A COMMON STOCK of GPGI INC is more than five percent of the total outstanding CLASS A COMMON STOCK.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See attached Exhibit 99.
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.

FMR LLC

Signature:	Richard Bourgelas
Name/Title:	Duly authorized under Power of Attorney effective as of April 13, 2026, by and on behalf of FMR LLC and its direct and indirect subsidiaries*
Date:	05/05/2026

Abigail P. Johnson

Signature:	Richard Bourgelas
Name/Title:	Duly authorized under Power of Attorney effective as of April 13, 2026, by and on behalf of Abigail P. Johnson*
Date:	05/05/2026

Comments accompanying signature: *This power of attorney is incorporated herein by reference to Exhibit 24 to the Schedule 13G filed by FMR LLC on April 29,2026, accession number: 0000315066-26-000738.

Exhibit Information

Please see Exhibit 99 for 13d-1(k) (1) agreement.

FAQ

What stake does FMR LLC report in GPGI Inc. (CMPO)?

FMR LLC reports beneficial ownership of 39,551,932.38 shares, representing 13.7% of GPGI Inc. Class A common stock. The filing lists sole dispositive power over the same 39,551,932.38 shares and sole voting power of 36,647,259.86 shares.

Who else is named in the Schedule 13G/A for CMPO?

The filing also names Abigail P. Johnson as having dispositive power over 39,551,932.38 shares. The cover references authority exercised under a power of attorney incorporated by reference to Exhibit 24 in related filings.

Does the Schedule 13G/A state FMR LLC will sell or buy shares?

The excerpt does not state any sale or purchase intentions. It reports beneficial ownership and voting/dispositive powers, and references exhibits for subsidiary and agreement details rather than describing trading plans or transactions.

Where can I find more detail on how these shares are held or allocated?

The filing references Exhibit 99 for a 13d-1(k)(1) agreement and cites a power of attorney incorporated by reference to Exhibit 24. Those exhibits likely describe subsidiary allocations or authority; check the referenced exhibits in the full filing.