GPGI, Inc. (GPGI)
NYSE: GPGI · Finance Services · Somerset, NJ · filing with the SEC since 2020
Who owns GPGI, Inc.
As filed with the SECHolders of 5% or more
5
Platinum Equity, LLC holds 18.3% of Class A Common Stock, par value $0.0001 per share, as its SCHEDULE 13D filed Jan 20, 2026 says.
Directors and officers
22
report now, of 37 people on the record since 2020. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Platinum Equity, LLC
SCHEDULE 13D · filed Jan 20, 2026 · Class A Common Stock, par value $0.0001 per share
John D. Cote
SCHEDULE 13D/A · filed Jan 14, 2026 · Class A Common Stock, $0.0001 Par Value per share · 41.1% in Nov 4, 2025
Fmr LLC
SCHEDULE 13G/A · filed Aug 6, 2026 · CLASS A COMMON STOCK · 13.7% in May 6, 2026
Alyeska Investment Group, L.P.
SCHEDULE 13G · filed May 15, 2026 · Class A Common stock, par value $0.0001 per share
Locust Wood Capital Advisers, LLC
SCHEDULE 13G · filed Jun 22, 2026 · GPGI, Inc. ("Issuer") (formerly, CompoSecure, Inc.) · 8.1% in Aug 13, 2025
Bleichroeder LP
SCHEDULE 13G/A · filed Oct 3, 2024 · Class A Common Stock, $0.0001 par value per share · reported falling below 5%
Tikvah Management LLC
SCHEDULE 13G/A · filed Feb 12, 2025 · Common Stock, par value $0.0001 per share · reported falling below 5%
Capital Research Global Investors
SCHEDULE 13G/A · filed May 14, 2026 · Common Stock · reported falling below 5%, from 7.3% in Feb 12, 2026
Steamboat Capital Partners, LLC
SCHEDULE 13G/A · filed Nov 14, 2024 · Class A Common Stock, $0.0001 par value per share · reported falling below 5%
Spurwink Management LLC
SCHEDULE 13G/A · filed Feb 12, 2025 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 6.8% in Feb 14, 2024
LMR Partners LLP
SCHEDULE 13G/A · filed Nov 14, 2025 · Class A Common Stock, par value $0.0001 per share · reported falling below 5%, from 7.9% in Aug 14, 2025
What GPGI reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
CompoSecure Holdings, L.L.C.
An investee · investee · invested in, named in the 10-K filed Mar 12, 2026
49 subsidiaries in 31 countries, from the list filed with the 10-K filed Mar 12, 2026.
Insider tradesForm 4
2sales
8purchases
0sales on a scheduled plan
1people selling
$500,000sold, in dollars
$2.1Mbought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window7 of 55 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Thompson Jane J. | director | 2 | $500,000 | 0 | 0 | $0 |
| Knott Thomas R. | Principal executive officer and Chief Investment Officer | 0 | $0 | 0 | 2 | $1.7M |
| Schoen Kurt | Principal financial officer and principal accounting officer | 0 | $0 | 0 | 2 | $100,000 |
| Cote John D. | director | 0 | $0 | 0 | 1 | $100,000 |
| Loree Rebecca Corbin | director | 0 | $0 | 0 | 1 | $100,000 |
| Mikkilineni Krishna | director | 0 | $0 | 0 | 1 | $100,000 |
| Moriarty Kevin M | director | 0 | $0 | 0 | 1 | $100,000 |