1 institutions reported holding $6,544 of M TRON INDS INC COM (MPTI) in SEC 13F filings for 2026-06-30. Largest institutional holders: GAMMA Investing LLC ($6,544). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GAMMA Investing LLC | $6,544 | 66 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30