2 institutions reported holding $369,640 of MATRIX SVC CO (MTRX) in SEC 13F filings for 2026-06-30. Largest institutional holders: Assenagon Asset Management S.A. ($364,667), GAMMA Investing LLC ($4,973). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Assenagon Asset Management S.A. | $364,667 | 26,618 | Hold |
| 2 | GAMMA Investing LLC | $4,973 | 363 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30