Tetra Tech Inc SEC filings TTEK
Tetra Tech Inc has 1,000 filings in SEC EDGAR's recent list, going back to Jan 8, 2015. Its latest annual report, Form ARS, was filed on Jan 9, 2026 for the period ended Sep 28, 2025. The latest quarterly report (Form 10-Q) was filed on Jul 31, 2026, covering the quarter ended Jun 28, 2026. The most recent current report (Form 8-K) was filed on Sep 10, 2026 (other events). The company's fiscal year ends on September 27.
| Form | Description | Filed | Period |
|---|---|---|---|
| DEFA14A | Additional proxy material | Jan 9, 2026 | — |
| DEF 14A | Proxy statement | Jan 9, 2026 | Feb 19, 2026 |
| DEFA14A | Additional proxy material | Jan 16, 2025 | — |
| DEF 14A | Proxy statement | Jan 16, 2025 | Feb 27, 2025 |
| DEFA14A | Additional proxy material | Jan 18, 2024 | — |
| DEF 14A | Proxy statement | Jan 18, 2024 | Feb 29, 2024 |
| DEFA14A | Additional proxy material | Jan 17, 2023 | — |
| DEF 14A | Proxy statement | Jan 17, 2023 | Feb 28, 2023 |
| DEFA14A | Additional proxy material | Jan 18, 2022 | — |
| DEF 14A | Proxy statement | Jan 18, 2022 | Mar 1, 2022 |
| DEFA14A | Additional proxy material | Jan 14, 2021 | — |
| DEF 14A | Proxy statement | Jan 14, 2021 | Feb 24, 2021 |
| DEFA14A | Additional proxy material | Jan 15, 2020 | — |
| DEF 14A | Proxy statement | Jan 15, 2020 | Feb 26, 2020 |
| DEFA14A | Additional proxy material | Jan 18, 2019 | — |
| DEF 14A | Proxy statement | Jan 18, 2019 | Feb 28, 2019 |
| DEFA14A | Additional proxy material | Jan 24, 2018 | — |
| DEF 14A | Proxy statement | Jan 24, 2018 | Mar 8, 2018 |
| DEFA14A | Additional proxy material | Jan 18, 2017 | — |
| DEF 14A | Proxy statement | Jan 18, 2017 | Mar 2, 2017 |
| DEFA14A | Additional proxy material | Jan 19, 2016 | — |
| DEF 14A | Proxy statement | Jan 19, 2016 | Mar 3, 2016 |
| DEFA14A | Additional proxy material | Jan 15, 2015 | — |
| DEF 14A | Proxy statement | Jan 15, 2015 | Mar 5, 2015 |
Showing 24 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Services-Engineering Services (SIC 8711)
- Listed as
- TTEK (Nasdaq)
- Fiscal year ends
- September 27
- Incorporated in
- DE
- Headquarters
- Pasadena, CA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 831641
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.