660 institutions reported holding $8.06B of TETRA TECH INC NEW (TTEK) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($840.7M), VANGUARD GROUP INC ($757.0M), Capital International Investors ($336.6M), STATE STREET CORP ($297.9M), FMR LLC ($264.4M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30