2 institutions reported holding $68,155 of GPGI INC (CMPOW) in SEC 13F filings for 2026-06-30. Largest institutional holders: GROUP ONE TRADING LLC ($36,455), SIMPLEX TRADING, LLC ($31,700). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $36,455 | 2,300 | Added |
| 2 | SIMPLEX TRADING, LLC | $31,700 | 2,000 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30