164 institutions reported holding $343.0M of MATRIX SVC CO (MTRX) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($29.3M), VANGUARD GROUP INC ($22.3M), NEEDHAM INVESTMENT MANAGEMENT LLC ($19.7M), AMERICAN CENTURY COMPANIES INC ($16.5M), GENDELL JEFFREY L ($16.3M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30