Tetra Tech INC Schedule 13G passive stakes

Vanguard Capital Management has disclosed beneficial ownership of 13,656,856 shares, representing 5.23% of Tetra Tech Inc.'s common stock as of March 31, 2026.

The Vanguard Group reports zero beneficial ownership in Tetra Tech Inc. following an internal realignment, disaggregating its reporting.

The Vanguard Group has filed an amended Schedule 13G, reporting a 10.14% beneficial ownership stake in Tetra Tech Inc. as of March 31, 2025.

Pictet Asset Management SA, a Swiss-based foreign institutional investor, has reported beneficial ownership of 5.2% of Tetra Tech Inc.'s common stock as of December 31, 2024.

BlackRock, Inc. has filed an amended Schedule 13G, revealing a beneficial ownership of 9.7% of Tetra Tech Inc.'s common stock as of December 31, 2024.