SEC ownership of GPGI, Inc.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001823144.

Comparable stake leader

PLATINUM EQUITY, LLC

Disclosed value leader

PLATINUM EQUITY, LLC

Comparable rows

50/50

Latest evidence

31 Mar 2026

Top shareholders Insider holders Latest transactions
Public ticker
GPGI on NYSE
Parsed ownership sources
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
PLATINUM EQUITY, LLC
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
PLATINUM EQUITY, LLC
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
31 Mar 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0001823144
Issuer location
Somerset, NJ

Ownership snapshot

Top shareholders of GPGI, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
PLATINUM EQUITY, LLC
Disclosed value leader
PLATINUM EQUITY, LLC
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G 3/4/5 13F Lead comparable stake: 18% 13D/G row: PLATINUM EQUITY, LLC Showing 1-8 of 50 holder rows.

Quick read

PLATINUM EQUITY, LLC leads the comparable SEC ownership view at 18%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens PLATINUM EQUITY, LLC's linked filing trail.
Comparable ownership Top 5
PLATINUM EQUITY, LLC 18%
Resolute Compo Holdings LLC 18%
FMR LLC 14%
Alyeska Investment Group, L.P. 7.4%
LOCUST WOOD CAPITAL ADVISERS, LLC 5.1%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
PLATINUM EQUITY, LLC
13D/G 3/4/5
10%+ Owner
13D/G 3/4/5
18%
$1,018,557,715
52,829,757 shares
 $0 12 Jan 2026
Resolute Compo Holdings LLC
13D/G 3/4/5
John D. Cote · Director, 10%+ Owner
13D/G 3/4/5
18%
$996,466,884
51,683,967 shares
 +$4,755,701 12 Jan 2026
FMR LLC
13F 13D/G
Company
13F 13D/G
14%
from 13D/G
$676,338,044
39,551,933 shares
 — 31 Mar 2026
Alyeska Investment Group, L.P.
13F 13D/G
Company
13F 13D/G
7.4%
from 13D/G
$365,858,827
21,395,253 shares
 — 31 Mar 2026
LOCUST WOOD CAPITAL ADVISERS, LLC
13F 13D/G
Company
13F 13D/G
5.1%
from 13D/G
$235,700,471
13,783,653 shares
 — 31 Mar 2026
Bleichroeder LP
13F 13D/G 3/4/5
Company · 10%+ Owner
13F 13D/G 3/4/5
4.7%
from 13D/G
$67,881,454
3,969,676 shares
 — 31 Mar 2026
Tikvah Management LLC
13D/G 3/4/5 13F
10%+ Owner · Company
13D/G 3/4/5 13F
4.2%
$48,280,555
4,295,423 shares
 $0 31 Dec 2024
Capital Research Global Investors
13F 13D/G
Company
13F 13D/G
3.9%
from 13D/G
$192,558,192
11,260,713 shares
 — 31 Mar 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$3,727,330.

Buys
$2,498,080
Insiders: 6
Sells
$6,225,410
Insiders: 4
Net
-$3,727,330
Shares: -153,547
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 176,277 Shares: 329,824
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 105,237 0 $1,245,733 $0 +$1,245,733
3-6 52,800 27,334 $901,700 $462,218 +$439,482
6-9 0 0 $0 $0 $0
9-12 18,240 302,490 $350,647 $5,763,192 -$5,412,545

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 36 reporting-owner rows connected to GPGI, Inc.. Open a relationship link for the CIK-to-CIK filing trail.

Rows
36
Largest Forms 3/4/5 holder
John D. Cote
Net 12M change
-$3,727,329
Latest report
11 Jun 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
John D. Cote Director $1,174,493,659 +$99,180 +0.01% Mixed 11 Jun 2026
PLATINUM EQUITY, LLC 10%+ Owner $1,018,557,714 Mixed 12 Jan 2026
Thomas R. Knott Principal executive officer and Chief Investment Officer, Director, 10%+ Owner $847,981,969 +$1,746,388 +0.21% Mixed 11 Jun 2026
Jonathan Wilk President and CEO, Director $66,861,921 Mixed 09 Sep 2025
Michele Logan Director, 10%+ Owner $65,092,710 Mixed 17 Sep 2024
Dixon Doll Jr. 10%+ Owner $25,731,049 Mixed 12 Sep 2022
Adam Joseph Lowe Chief Product & Innov. Officer $25,594,084 Mixed 01 Jan 2026
Bleichroeder LP 10%+ Owner $24,684,075 Filing P/S 09 May 2024
Timothy Walter Fitzsimmons Chief Financial Officer $15,226,574 -$1,874,000 -11% Mixed 08 Sep 2025
Resolute Compo Holdings LLC Director, 10%+ Owner $14,580,987 Filing P/S 20 Feb 2025
Amanda Mandy Gourbault Chief Revenue Officer $13,978,829 -$1,623,642 -10% Mixed 01 Jan 2026
Gregoire Maes Chief Operating Officer $13,085,073 -$2,265,550 -15% Mixed 01 Jan 2026
Kurt Schoen Principal financial officer and principal accounting officer $7,375,867 +$101,320 +1.4% Filing P/S 13 May 2026
Bradley J. Selleck President and Chief Executive Officer of Husky reporting segment // Exhibit 24 - Power of Attorney $6,355,395 Mixed 22 Jan 2026
Joseph J. DeAngelo Director $5,953,569 Mixed 11 Jun 2026
Tikvah Management LLC 10%+ Owner $5,068,957 Mixed 10 Oct 2022
Graham Robinson President and Chief Executive Officer of CompoSecure reporting segment $4,499,988 Mixed 22 Jan 2026
Paul Galant Director $2,727,382 Mixed 11 Jun 2026
Brian F. Hughes Director $2,266,029 Mixed 11 Jun 2026
Mark R. James Director $1,949,569 Mixed 11 Jun 2026

Recent insider transactions for GPGI, Inc.

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Jane J. Thompson GPGI Stock Option (Right to Buy) Award 30,738 30,738 11 Jun 2026 Direct
Kevin M. Moriarty GPGI Stock Option (Right to Buy) Award 81,968 71,722 11 Jun 2026 Direct
Krishna Mikkilineni GPGI Stock Option (Right to Buy) Award 43,033 30,738 11 Jun 2026 Direct
Rebecca Corbin Loree GPGI Stock Option (Right to Buy) Award 61,476 51,230 11 Jun 2026 Direct
Mark R. James GPGI Stock Option (Right to Buy) Award 40,984 40,984 11 Jun 2026 Direct
Brian F. Hughes GPGI Stock Option (Right to Buy) Award 30,738 30,738 11 Jun 2026 Direct
Paul Galant GPGI Stock Option (Right to Buy) Award 40,984 30,738 11 Jun 2026 Direct
Joseph J. DeAngelo GPGI Stock Option (Right to Buy) Award 46,107 30,738 11 Jun 2026 Direct
John D. Cote GPGI Stock Option (Right to Buy) Award 30,738 30,738 11 Jun 2026 Direct
Thomas R. Knott GPGI Class A Common Stock Purchase 193.8% $994,868 $11.67 85,250 129,250 11 Jun 2026 Direct
Kevin M. Moriarty GPGI Class A Common Stock Purchase 5.9% $50,000 $12.64 3,956 71,011 26 May 2026 Direct
Krishna Mikkilineni GPGI Class A Common Stock Purchase 300.5% $100,031 $12.34 8,106 10,804 14 May 2026 Direct
Kurt Schoen GPGI Class A Common Stock Purchase 0.69% $50,320 $12.58 4,000 586,317 13 May 2026 Direct
Rebecca Corbin Loree GPGI Class A Common Stock Purchase 6.62% $50,515 $12.87 3,925 63,220 12 May 2026 Direct
Jane J. Thompson GPGI Class A Common Stock Sale -14% $231,109 $16.91 -13,667 83,813 17 Mar 2026 Direct
Jane J. Thompson GPGI Class A Common Stock Sale -14% $231,109 $16.91 -13,667 83,813 17 Mar 2026 Direct
Kurt Schoen GPGI Class A Common Stock Purchase $51,000 $17.00 3,000 3,000 17 Mar 2026 Direct
John D. Cote GPGI Class A Common Stock Purchase $99,180 $17.10 5,800 5,800 17 Mar 2026 By Spouse
Thomas R. Knott GPGI Class A Common Stock Purchase $751,520 $17.08 44,000 44,000 17 Mar 2026 Direct
Kurt Schoen GPGI Stock Option (Right to Buy) Award 143,754 143,754 26 Feb 2026 Direct
Thomas R. Knott GPGI Stock Option (Right to Buy) Award 1,150,029 1,150,029 26 Feb 2026 Direct
David M. Cote GPGI Stock Option (Right to Buy) Award 1,265,032 1,265,032 26 Feb 2026 Direct
Graham Robinson GPGI Class A Common Stock Award 178,926 178,926 22 Jan 2026 Direct
Kevin M. Moriarty CMPO Class A Common Stock Award 415.8% 54,055 67,055 12 Jan 2026 Direct
Krishna Mikkilineni CMPO Class A Common Stock Award 64,865 64,865 12 Jan 2026 Direct
Mark R. James CMPO Class A Common Stock Award 54,055 54,055 12 Jan 2026 Direct
Brian F. Hughes CMPO Class A Common Stock Award 28.6% 27,028 121,405 12 Jan 2026 Direct
Paul Galant CMPO Class A Common Stock Award 58.6% 54,055 146,343 12 Jan 2026 Direct
Joseph J. Deangelo CMPO Class A Common Stock Award 600% 270,271 315,316 12 Jan 2026 Direct
David M. Cote CMPO Class A Common Stock Award 241.4% 54,055 76,449 12 Jan 2026 By Spouse
Rebecca Corbin Loree CMPO Class A Common Stock Award 1031.6% 54,055 59,295 12 Jan 2026 Direct
Jonathan Wilk CMPO Class A Common Stock Tax liability -1.79% -49,112 2,697,647 02 Jan 2026 Direct
Gregoire Maes CMPO Class A Common Stock Tax liability -4.51% -30,515 645,653 02 Jan 2026 Direct
Adam Joseph Lowe CMPO Class A Common Stock Tax liability -1.82% -24,649 1,327,494 02 Jan 2026 Direct
Amanda Mandy Gourbault CMPO Class A Common Stock Tax liability -2.14% -15,868 725,043 02 Jan 2026 Direct
Jonathan Wilk CMPO Class A Common Stock Tax liability -14.9% -512,892 2,937,389 01 Jan 2026 Direct
Gregoire Maes CMPO Class A Common Stock Tax liability -13.5% -105,812 676,168 01 Jan 2026 Direct
Adam Joseph Lowe CMPO Class A Common Stock Tax liability -9.53% -142,515 1,352,143 01 Jan 2026 Direct
Amanda Mandy Gourbault CMPO Class A Common Stock Tax liability -7.35% -58,757 740,911 01 Jan 2026 Direct
Jonathan Wilk CMPO Class A Common Stock Tax liability -4.68% -169,439 3,450,281 09 Sep 2025 Direct
Jonathan Wilk CMPO Class A Common Stock, $0.0001 par value Award 11.9% 82,094 770,295 08 Sep 2025 By CompoSecure Employee LLC
Timothy Walter Fitzsimmons CMPO Class A Common Stock Tax liability -2.39% -19,250 784,875 08 Sep 2025 Direct
Timothy Walter Fitzsimmons CMPO Class A Common Stock Award 5.84% 44,336 804,125 08 Sep 2025 Direct
Gregoire Maes CMPO Class A Common Stock Tax liability -0.44% -3,452 781,980 08 Sep 2025 Direct
Gregoire Maes CMPO Class A Common Stock Award 0.82% 6,370 785,432 08 Sep 2025 Direct
Adam Joseph Lowe CMPO Class A Common Stock Tax liability -0.94% -14,116 1,494,658 08 Sep 2025 Direct
Adam Joseph Lowe CMPO Class A Common Stock Award 1.87% 27,738 1,508,774 08 Sep 2025 Direct
Rebecca Corbin Loree CMPO Class A Common Stock Purchase $100,007 $19.09 5,240 5,240 29 Aug 2025 Direct
Gregoire Maes CMPO Class A Common Stock Sale -11.1% $1,882,295 $19.36 -97,226 779,062 14 Aug 2025 Direct
Gregoire Maes CMPO Class A Common Stock Options Exercise 12.5% 97,226 876,288 14 Aug 2025 Direct
* marks a reported price that did not pass the local price check.
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