The Vanguard Group 13D and 13G filings for Tetra Tech, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2025-04-07 11:51 am Purchase | 2025-03-31 | 13G | Tetra Tech, Inc. TTEK | The Vanguard Group | 27,185,795 10.140% | 1,416,530 (+5.50%) | Filing |
| 2024-02-13 5:15 pm Sale | 2023-12-29 | 13G | Tetra Tech, Inc. TTEK | The Vanguard Group | 25,769,265 9.680% | -915,240 (-3.43%) | Filing |
| 2023-02-09 11:35 am Purchase | 2022-12-30 | 13G | Tetra Tech, Inc. TTEK | The Vanguard Group | 26,684,505 10.070% | 50,050 (+0.19%) | Filing |
| 2022-12-12 3:09 pm Purchase | 2022-11-30 | 13G | Tetra Tech, Inc. TTEK | The Vanguard Group | 26,634,455 10.050% | 425,950 (+1.63%) | Filing |
| 2022-02-10 08:42 am Purchase | 2021-12-31 | 13G | Tetra Tech, Inc. TTEK | The Vanguard Group | 26,208,505 9.730% | 487,400 (+1.89%) | Filing |
| 2021-02-10 11:57 am Sale | 2020-12-31 | 13G | Tetra Tech, Inc. TTEK | The Vanguard Group | 25,721,105 9.570% | -1,711,970 (-6.24%) | Filing |